]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
4 | #include "cache.h" | |
5 | #include "config.h" | |
6 | #include "tempfile.h" | |
7 | #include "quote.h" | |
8 | #include "diff.h" | |
9 | #include "diffcore.h" | |
10 | #include "delta.h" | |
11 | #include "xdiff-interface.h" | |
12 | #include "color.h" | |
13 | #include "attr.h" | |
14 | #include "run-command.h" | |
15 | #include "utf8.h" | |
16 | #include "userdiff.h" | |
17 | #include "submodule-config.h" | |
18 | #include "submodule.h" | |
19 | #include "hashmap.h" | |
20 | #include "ll-merge.h" | |
21 | #include "string-list.h" | |
22 | #include "argv-array.h" | |
23 | #include "graph.h" | |
24 | #include "packfile.h" | |
25 | ||
26 | #ifdef NO_FAST_WORKING_DIRECTORY | |
27 | #define FAST_WORKING_DIRECTORY 0 | |
28 | #else | |
29 | #define FAST_WORKING_DIRECTORY 1 | |
30 | #endif | |
31 | ||
32 | static int diff_detect_rename_default; | |
33 | static int diff_indent_heuristic = 1; | |
34 | static int diff_rename_limit_default = 400; | |
35 | static int diff_suppress_blank_empty; | |
36 | static int diff_use_color_default = -1; | |
37 | static int diff_color_moved_default; | |
38 | static int diff_context_default = 3; | |
39 | static int diff_interhunk_context_default; | |
40 | static const char *diff_word_regex_cfg; | |
41 | static const char *external_diff_cmd_cfg; | |
42 | static const char *diff_order_file_cfg; | |
43 | int diff_auto_refresh_index = 1; | |
44 | static int diff_mnemonic_prefix; | |
45 | static int diff_no_prefix; | |
46 | static int diff_stat_graph_width; | |
47 | static int diff_dirstat_permille_default = 30; | |
48 | static struct diff_options default_diff_options; | |
49 | static long diff_algorithm; | |
50 | static unsigned ws_error_highlight_default = WSEH_NEW; | |
51 | ||
52 | static char diff_colors[][COLOR_MAXLEN] = { | |
53 | GIT_COLOR_RESET, | |
54 | GIT_COLOR_NORMAL, /* CONTEXT */ | |
55 | GIT_COLOR_BOLD, /* METAINFO */ | |
56 | GIT_COLOR_CYAN, /* FRAGINFO */ | |
57 | GIT_COLOR_RED, /* OLD */ | |
58 | GIT_COLOR_GREEN, /* NEW */ | |
59 | GIT_COLOR_YELLOW, /* COMMIT */ | |
60 | GIT_COLOR_BG_RED, /* WHITESPACE */ | |
61 | GIT_COLOR_NORMAL, /* FUNCINFO */ | |
62 | GIT_COLOR_BOLD_MAGENTA, /* OLD_MOVED */ | |
63 | GIT_COLOR_BOLD_BLUE, /* OLD_MOVED ALTERNATIVE */ | |
64 | GIT_COLOR_FAINT, /* OLD_MOVED_DIM */ | |
65 | GIT_COLOR_FAINT_ITALIC, /* OLD_MOVED_ALTERNATIVE_DIM */ | |
66 | GIT_COLOR_BOLD_CYAN, /* NEW_MOVED */ | |
67 | GIT_COLOR_BOLD_YELLOW, /* NEW_MOVED ALTERNATIVE */ | |
68 | GIT_COLOR_FAINT, /* NEW_MOVED_DIM */ | |
69 | GIT_COLOR_FAINT_ITALIC, /* NEW_MOVED_ALTERNATIVE_DIM */ | |
70 | }; | |
71 | ||
72 | static NORETURN void die_want_option(const char *option_name) | |
73 | { | |
74 | die(_("option '%s' requires a value"), option_name); | |
75 | } | |
76 | ||
77 | static int parse_diff_color_slot(const char *var) | |
78 | { | |
79 | if (!strcasecmp(var, "context") || !strcasecmp(var, "plain")) | |
80 | return DIFF_CONTEXT; | |
81 | if (!strcasecmp(var, "meta")) | |
82 | return DIFF_METAINFO; | |
83 | if (!strcasecmp(var, "frag")) | |
84 | return DIFF_FRAGINFO; | |
85 | if (!strcasecmp(var, "old")) | |
86 | return DIFF_FILE_OLD; | |
87 | if (!strcasecmp(var, "new")) | |
88 | return DIFF_FILE_NEW; | |
89 | if (!strcasecmp(var, "commit")) | |
90 | return DIFF_COMMIT; | |
91 | if (!strcasecmp(var, "whitespace")) | |
92 | return DIFF_WHITESPACE; | |
93 | if (!strcasecmp(var, "func")) | |
94 | return DIFF_FUNCINFO; | |
95 | if (!strcasecmp(var, "oldmoved")) | |
96 | return DIFF_FILE_OLD_MOVED; | |
97 | if (!strcasecmp(var, "oldmovedalternative")) | |
98 | return DIFF_FILE_OLD_MOVED_ALT; | |
99 | if (!strcasecmp(var, "oldmoveddimmed")) | |
100 | return DIFF_FILE_OLD_MOVED_DIM; | |
101 | if (!strcasecmp(var, "oldmovedalternativedimmed")) | |
102 | return DIFF_FILE_OLD_MOVED_ALT_DIM; | |
103 | if (!strcasecmp(var, "newmoved")) | |
104 | return DIFF_FILE_NEW_MOVED; | |
105 | if (!strcasecmp(var, "newmovedalternative")) | |
106 | return DIFF_FILE_NEW_MOVED_ALT; | |
107 | if (!strcasecmp(var, "newmoveddimmed")) | |
108 | return DIFF_FILE_NEW_MOVED_DIM; | |
109 | if (!strcasecmp(var, "newmovedalternativedimmed")) | |
110 | return DIFF_FILE_NEW_MOVED_ALT_DIM; | |
111 | return -1; | |
112 | } | |
113 | ||
114 | static int parse_dirstat_params(struct diff_options *options, const char *params_string, | |
115 | struct strbuf *errmsg) | |
116 | { | |
117 | char *params_copy = xstrdup(params_string); | |
118 | struct string_list params = STRING_LIST_INIT_NODUP; | |
119 | int ret = 0; | |
120 | int i; | |
121 | ||
122 | if (*params_copy) | |
123 | string_list_split_in_place(¶ms, params_copy, ',', -1); | |
124 | for (i = 0; i < params.nr; i++) { | |
125 | const char *p = params.items[i].string; | |
126 | if (!strcmp(p, "changes")) { | |
127 | options->flags.dirstat_by_line = 0; | |
128 | options->flags.dirstat_by_file = 0; | |
129 | } else if (!strcmp(p, "lines")) { | |
130 | options->flags.dirstat_by_line = 1; | |
131 | options->flags.dirstat_by_file = 0; | |
132 | } else if (!strcmp(p, "files")) { | |
133 | options->flags.dirstat_by_line = 0; | |
134 | options->flags.dirstat_by_file = 1; | |
135 | } else if (!strcmp(p, "noncumulative")) { | |
136 | options->flags.dirstat_cumulative = 0; | |
137 | } else if (!strcmp(p, "cumulative")) { | |
138 | options->flags.dirstat_cumulative = 1; | |
139 | } else if (isdigit(*p)) { | |
140 | char *end; | |
141 | int permille = strtoul(p, &end, 10) * 10; | |
142 | if (*end == '.' && isdigit(*++end)) { | |
143 | /* only use first digit */ | |
144 | permille += *end - '0'; | |
145 | /* .. and ignore any further digits */ | |
146 | while (isdigit(*++end)) | |
147 | ; /* nothing */ | |
148 | } | |
149 | if (!*end) | |
150 | options->dirstat_permille = permille; | |
151 | else { | |
152 | strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%s'\n"), | |
153 | p); | |
154 | ret++; | |
155 | } | |
156 | } else { | |
157 | strbuf_addf(errmsg, _(" Unknown dirstat parameter '%s'\n"), p); | |
158 | ret++; | |
159 | } | |
160 | ||
161 | } | |
162 | string_list_clear(¶ms, 0); | |
163 | free(params_copy); | |
164 | return ret; | |
165 | } | |
166 | ||
167 | static int parse_submodule_params(struct diff_options *options, const char *value) | |
168 | { | |
169 | if (!strcmp(value, "log")) | |
170 | options->submodule_format = DIFF_SUBMODULE_LOG; | |
171 | else if (!strcmp(value, "short")) | |
172 | options->submodule_format = DIFF_SUBMODULE_SHORT; | |
173 | else if (!strcmp(value, "diff")) | |
174 | options->submodule_format = DIFF_SUBMODULE_INLINE_DIFF; | |
175 | else | |
176 | return -1; | |
177 | return 0; | |
178 | } | |
179 | ||
180 | static int git_config_rename(const char *var, const char *value) | |
181 | { | |
182 | if (!value) | |
183 | return DIFF_DETECT_RENAME; | |
184 | if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) | |
185 | return DIFF_DETECT_COPY; | |
186 | return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; | |
187 | } | |
188 | ||
189 | long parse_algorithm_value(const char *value) | |
190 | { | |
191 | if (!value) | |
192 | return -1; | |
193 | else if (!strcasecmp(value, "myers") || !strcasecmp(value, "default")) | |
194 | return 0; | |
195 | else if (!strcasecmp(value, "minimal")) | |
196 | return XDF_NEED_MINIMAL; | |
197 | else if (!strcasecmp(value, "patience")) | |
198 | return XDF_PATIENCE_DIFF; | |
199 | else if (!strcasecmp(value, "histogram")) | |
200 | return XDF_HISTOGRAM_DIFF; | |
201 | return -1; | |
202 | } | |
203 | ||
204 | static int parse_one_token(const char **arg, const char *token) | |
205 | { | |
206 | const char *rest; | |
207 | if (skip_prefix(*arg, token, &rest) && (!*rest || *rest == ',')) { | |
208 | *arg = rest; | |
209 | return 1; | |
210 | } | |
211 | return 0; | |
212 | } | |
213 | ||
214 | static int parse_ws_error_highlight(const char *arg) | |
215 | { | |
216 | const char *orig_arg = arg; | |
217 | unsigned val = 0; | |
218 | ||
219 | while (*arg) { | |
220 | if (parse_one_token(&arg, "none")) | |
221 | val = 0; | |
222 | else if (parse_one_token(&arg, "default")) | |
223 | val = WSEH_NEW; | |
224 | else if (parse_one_token(&arg, "all")) | |
225 | val = WSEH_NEW | WSEH_OLD | WSEH_CONTEXT; | |
226 | else if (parse_one_token(&arg, "new")) | |
227 | val |= WSEH_NEW; | |
228 | else if (parse_one_token(&arg, "old")) | |
229 | val |= WSEH_OLD; | |
230 | else if (parse_one_token(&arg, "context")) | |
231 | val |= WSEH_CONTEXT; | |
232 | else { | |
233 | return -1 - (int)(arg - orig_arg); | |
234 | } | |
235 | if (*arg) | |
236 | arg++; | |
237 | } | |
238 | return val; | |
239 | } | |
240 | ||
241 | /* | |
242 | * These are to give UI layer defaults. | |
243 | * The core-level commands such as git-diff-files should | |
244 | * never be affected by the setting of diff.renames | |
245 | * the user happens to have in the configuration file. | |
246 | */ | |
247 | void init_diff_ui_defaults(void) | |
248 | { | |
249 | diff_detect_rename_default = DIFF_DETECT_RENAME; | |
250 | } | |
251 | ||
252 | int git_diff_heuristic_config(const char *var, const char *value, void *cb) | |
253 | { | |
254 | if (!strcmp(var, "diff.indentheuristic")) | |
255 | diff_indent_heuristic = git_config_bool(var, value); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static int parse_color_moved(const char *arg) | |
260 | { | |
261 | switch (git_parse_maybe_bool(arg)) { | |
262 | case 0: | |
263 | return COLOR_MOVED_NO; | |
264 | case 1: | |
265 | return COLOR_MOVED_DEFAULT; | |
266 | default: | |
267 | break; | |
268 | } | |
269 | ||
270 | if (!strcmp(arg, "no")) | |
271 | return COLOR_MOVED_NO; | |
272 | else if (!strcmp(arg, "plain")) | |
273 | return COLOR_MOVED_PLAIN; | |
274 | else if (!strcmp(arg, "zebra")) | |
275 | return COLOR_MOVED_ZEBRA; | |
276 | else if (!strcmp(arg, "default")) | |
277 | return COLOR_MOVED_DEFAULT; | |
278 | else if (!strcmp(arg, "dimmed_zebra")) | |
279 | return COLOR_MOVED_ZEBRA_DIM; | |
280 | else | |
281 | return error(_("color moved setting must be one of 'no', 'default', 'zebra', 'dimmed_zebra', 'plain'")); | |
282 | } | |
283 | ||
284 | int git_diff_ui_config(const char *var, const char *value, void *cb) | |
285 | { | |
286 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { | |
287 | diff_use_color_default = git_config_colorbool(var, value); | |
288 | return 0; | |
289 | } | |
290 | if (!strcmp(var, "diff.colormoved")) { | |
291 | int cm = parse_color_moved(value); | |
292 | if (cm < 0) | |
293 | return -1; | |
294 | diff_color_moved_default = cm; | |
295 | return 0; | |
296 | } | |
297 | if (!strcmp(var, "diff.context")) { | |
298 | diff_context_default = git_config_int(var, value); | |
299 | if (diff_context_default < 0) | |
300 | return -1; | |
301 | return 0; | |
302 | } | |
303 | if (!strcmp(var, "diff.interhunkcontext")) { | |
304 | diff_interhunk_context_default = git_config_int(var, value); | |
305 | if (diff_interhunk_context_default < 0) | |
306 | return -1; | |
307 | return 0; | |
308 | } | |
309 | if (!strcmp(var, "diff.renames")) { | |
310 | diff_detect_rename_default = git_config_rename(var, value); | |
311 | return 0; | |
312 | } | |
313 | if (!strcmp(var, "diff.autorefreshindex")) { | |
314 | diff_auto_refresh_index = git_config_bool(var, value); | |
315 | return 0; | |
316 | } | |
317 | if (!strcmp(var, "diff.mnemonicprefix")) { | |
318 | diff_mnemonic_prefix = git_config_bool(var, value); | |
319 | return 0; | |
320 | } | |
321 | if (!strcmp(var, "diff.noprefix")) { | |
322 | diff_no_prefix = git_config_bool(var, value); | |
323 | return 0; | |
324 | } | |
325 | if (!strcmp(var, "diff.statgraphwidth")) { | |
326 | diff_stat_graph_width = git_config_int(var, value); | |
327 | return 0; | |
328 | } | |
329 | if (!strcmp(var, "diff.external")) | |
330 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
331 | if (!strcmp(var, "diff.wordregex")) | |
332 | return git_config_string(&diff_word_regex_cfg, var, value); | |
333 | if (!strcmp(var, "diff.orderfile")) | |
334 | return git_config_pathname(&diff_order_file_cfg, var, value); | |
335 | ||
336 | if (!strcmp(var, "diff.ignoresubmodules")) | |
337 | handle_ignore_submodules_arg(&default_diff_options, value); | |
338 | ||
339 | if (!strcmp(var, "diff.submodule")) { | |
340 | if (parse_submodule_params(&default_diff_options, value)) | |
341 | warning(_("Unknown value for 'diff.submodule' config variable: '%s'"), | |
342 | value); | |
343 | return 0; | |
344 | } | |
345 | ||
346 | if (!strcmp(var, "diff.algorithm")) { | |
347 | diff_algorithm = parse_algorithm_value(value); | |
348 | if (diff_algorithm < 0) | |
349 | return -1; | |
350 | return 0; | |
351 | } | |
352 | ||
353 | if (!strcmp(var, "diff.wserrorhighlight")) { | |
354 | int val = parse_ws_error_highlight(value); | |
355 | if (val < 0) | |
356 | return -1; | |
357 | ws_error_highlight_default = val; | |
358 | return 0; | |
359 | } | |
360 | ||
361 | if (git_color_config(var, value, cb) < 0) | |
362 | return -1; | |
363 | ||
364 | return git_diff_basic_config(var, value, cb); | |
365 | } | |
366 | ||
367 | int git_diff_basic_config(const char *var, const char *value, void *cb) | |
368 | { | |
369 | const char *name; | |
370 | ||
371 | if (!strcmp(var, "diff.renamelimit")) { | |
372 | diff_rename_limit_default = git_config_int(var, value); | |
373 | return 0; | |
374 | } | |
375 | ||
376 | if (userdiff_config(var, value) < 0) | |
377 | return -1; | |
378 | ||
379 | if (skip_prefix(var, "diff.color.", &name) || | |
380 | skip_prefix(var, "color.diff.", &name)) { | |
381 | int slot = parse_diff_color_slot(name); | |
382 | if (slot < 0) | |
383 | return 0; | |
384 | if (!value) | |
385 | return config_error_nonbool(var); | |
386 | return color_parse(value, diff_colors[slot]); | |
387 | } | |
388 | ||
389 | /* like GNU diff's --suppress-blank-empty option */ | |
390 | if (!strcmp(var, "diff.suppressblankempty") || | |
391 | /* for backwards compatibility */ | |
392 | !strcmp(var, "diff.suppress-blank-empty")) { | |
393 | diff_suppress_blank_empty = git_config_bool(var, value); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | if (!strcmp(var, "diff.dirstat")) { | |
398 | struct strbuf errmsg = STRBUF_INIT; | |
399 | default_diff_options.dirstat_permille = diff_dirstat_permille_default; | |
400 | if (parse_dirstat_params(&default_diff_options, value, &errmsg)) | |
401 | warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), | |
402 | errmsg.buf); | |
403 | strbuf_release(&errmsg); | |
404 | diff_dirstat_permille_default = default_diff_options.dirstat_permille; | |
405 | return 0; | |
406 | } | |
407 | ||
408 | if (git_diff_heuristic_config(var, value, cb) < 0) | |
409 | return -1; | |
410 | ||
411 | return git_default_config(var, value, cb); | |
412 | } | |
413 | ||
414 | static char *quote_two(const char *one, const char *two) | |
415 | { | |
416 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
417 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
418 | struct strbuf res = STRBUF_INIT; | |
419 | ||
420 | if (need_one + need_two) { | |
421 | strbuf_addch(&res, '"'); | |
422 | quote_c_style(one, &res, NULL, 1); | |
423 | quote_c_style(two, &res, NULL, 1); | |
424 | strbuf_addch(&res, '"'); | |
425 | } else { | |
426 | strbuf_addstr(&res, one); | |
427 | strbuf_addstr(&res, two); | |
428 | } | |
429 | return strbuf_detach(&res, NULL); | |
430 | } | |
431 | ||
432 | static const char *external_diff(void) | |
433 | { | |
434 | static const char *external_diff_cmd = NULL; | |
435 | static int done_preparing = 0; | |
436 | ||
437 | if (done_preparing) | |
438 | return external_diff_cmd; | |
439 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
440 | if (!external_diff_cmd) | |
441 | external_diff_cmd = external_diff_cmd_cfg; | |
442 | done_preparing = 1; | |
443 | return external_diff_cmd; | |
444 | } | |
445 | ||
446 | /* | |
447 | * Keep track of files used for diffing. Sometimes such an entry | |
448 | * refers to a temporary file, sometimes to an existing file, and | |
449 | * sometimes to "/dev/null". | |
450 | */ | |
451 | static struct diff_tempfile { | |
452 | /* | |
453 | * filename external diff should read from, or NULL if this | |
454 | * entry is currently not in use: | |
455 | */ | |
456 | const char *name; | |
457 | ||
458 | char hex[GIT_MAX_HEXSZ + 1]; | |
459 | char mode[10]; | |
460 | ||
461 | /* | |
462 | * If this diff_tempfile instance refers to a temporary file, | |
463 | * this tempfile object is used to manage its lifetime. | |
464 | */ | |
465 | struct tempfile *tempfile; | |
466 | } diff_temp[2]; | |
467 | ||
468 | struct emit_callback { | |
469 | int color_diff; | |
470 | unsigned ws_rule; | |
471 | int blank_at_eof_in_preimage; | |
472 | int blank_at_eof_in_postimage; | |
473 | int lno_in_preimage; | |
474 | int lno_in_postimage; | |
475 | const char **label_path; | |
476 | struct diff_words_data *diff_words; | |
477 | struct diff_options *opt; | |
478 | struct strbuf *header; | |
479 | }; | |
480 | ||
481 | static int count_lines(const char *data, int size) | |
482 | { | |
483 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
484 | count = 0; | |
485 | while (0 < size--) { | |
486 | ch = *data++; | |
487 | if (ch == '\n') { | |
488 | count++; | |
489 | nl_just_seen = 1; | |
490 | completely_empty = 0; | |
491 | } | |
492 | else { | |
493 | nl_just_seen = 0; | |
494 | completely_empty = 0; | |
495 | } | |
496 | } | |
497 | if (completely_empty) | |
498 | return 0; | |
499 | if (!nl_just_seen) | |
500 | count++; /* no trailing newline */ | |
501 | return count; | |
502 | } | |
503 | ||
504 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) | |
505 | { | |
506 | if (!DIFF_FILE_VALID(one)) { | |
507 | mf->ptr = (char *)""; /* does not matter */ | |
508 | mf->size = 0; | |
509 | return 0; | |
510 | } | |
511 | else if (diff_populate_filespec(one, 0)) | |
512 | return -1; | |
513 | ||
514 | mf->ptr = one->data; | |
515 | mf->size = one->size; | |
516 | return 0; | |
517 | } | |
518 | ||
519 | /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ | |
520 | static unsigned long diff_filespec_size(struct diff_filespec *one) | |
521 | { | |
522 | if (!DIFF_FILE_VALID(one)) | |
523 | return 0; | |
524 | diff_populate_filespec(one, CHECK_SIZE_ONLY); | |
525 | return one->size; | |
526 | } | |
527 | ||
528 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) | |
529 | { | |
530 | char *ptr = mf->ptr; | |
531 | long size = mf->size; | |
532 | int cnt = 0; | |
533 | ||
534 | if (!size) | |
535 | return cnt; | |
536 | ptr += size - 1; /* pointing at the very end */ | |
537 | if (*ptr != '\n') | |
538 | ; /* incomplete line */ | |
539 | else | |
540 | ptr--; /* skip the last LF */ | |
541 | while (mf->ptr < ptr) { | |
542 | char *prev_eol; | |
543 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
544 | if (*prev_eol == '\n') | |
545 | break; | |
546 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
547 | break; | |
548 | cnt++; | |
549 | ptr = prev_eol - 1; | |
550 | } | |
551 | return cnt; | |
552 | } | |
553 | ||
554 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
555 | struct emit_callback *ecbdata) | |
556 | { | |
557 | int l1, l2, at; | |
558 | unsigned ws_rule = ecbdata->ws_rule; | |
559 | l1 = count_trailing_blank(mf1, ws_rule); | |
560 | l2 = count_trailing_blank(mf2, ws_rule); | |
561 | if (l2 <= l1) { | |
562 | ecbdata->blank_at_eof_in_preimage = 0; | |
563 | ecbdata->blank_at_eof_in_postimage = 0; | |
564 | return; | |
565 | } | |
566 | at = count_lines(mf1->ptr, mf1->size); | |
567 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
568 | ||
569 | at = count_lines(mf2->ptr, mf2->size); | |
570 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
571 | } | |
572 | ||
573 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, | |
574 | int first, const char *line, int len) | |
575 | { | |
576 | int has_trailing_newline, has_trailing_carriage_return; | |
577 | int nofirst; | |
578 | FILE *file = o->file; | |
579 | ||
580 | fputs(diff_line_prefix(o), file); | |
581 | ||
582 | if (len == 0) { | |
583 | has_trailing_newline = (first == '\n'); | |
584 | has_trailing_carriage_return = (!has_trailing_newline && | |
585 | (first == '\r')); | |
586 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
587 | } else { | |
588 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
589 | if (has_trailing_newline) | |
590 | len--; | |
591 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
592 | if (has_trailing_carriage_return) | |
593 | len--; | |
594 | nofirst = 0; | |
595 | } | |
596 | ||
597 | if (len || !nofirst) { | |
598 | fputs(set, file); | |
599 | if (!nofirst) | |
600 | fputc(first, file); | |
601 | fwrite(line, len, 1, file); | |
602 | fputs(reset, file); | |
603 | } | |
604 | if (has_trailing_carriage_return) | |
605 | fputc('\r', file); | |
606 | if (has_trailing_newline) | |
607 | fputc('\n', file); | |
608 | } | |
609 | ||
610 | static void emit_line(struct diff_options *o, const char *set, const char *reset, | |
611 | const char *line, int len) | |
612 | { | |
613 | emit_line_0(o, set, reset, line[0], line+1, len-1); | |
614 | } | |
615 | ||
616 | enum diff_symbol { | |
617 | DIFF_SYMBOL_BINARY_DIFF_HEADER, | |
618 | DIFF_SYMBOL_BINARY_DIFF_HEADER_DELTA, | |
619 | DIFF_SYMBOL_BINARY_DIFF_HEADER_LITERAL, | |
620 | DIFF_SYMBOL_BINARY_DIFF_BODY, | |
621 | DIFF_SYMBOL_BINARY_DIFF_FOOTER, | |
622 | DIFF_SYMBOL_STATS_SUMMARY_NO_FILES, | |
623 | DIFF_SYMBOL_STATS_SUMMARY_ABBREV, | |
624 | DIFF_SYMBOL_STATS_SUMMARY_INSERTS_DELETES, | |
625 | DIFF_SYMBOL_STATS_LINE, | |
626 | DIFF_SYMBOL_WORD_DIFF, | |
627 | DIFF_SYMBOL_STAT_SEP, | |
628 | DIFF_SYMBOL_SUMMARY, | |
629 | DIFF_SYMBOL_SUBMODULE_ADD, | |
630 | DIFF_SYMBOL_SUBMODULE_DEL, | |
631 | DIFF_SYMBOL_SUBMODULE_UNTRACKED, | |
632 | DIFF_SYMBOL_SUBMODULE_MODIFIED, | |
633 | DIFF_SYMBOL_SUBMODULE_HEADER, | |
634 | DIFF_SYMBOL_SUBMODULE_ERROR, | |
635 | DIFF_SYMBOL_SUBMODULE_PIPETHROUGH, | |
636 | DIFF_SYMBOL_REWRITE_DIFF, | |
637 | DIFF_SYMBOL_BINARY_FILES, | |
638 | DIFF_SYMBOL_HEADER, | |
639 | DIFF_SYMBOL_FILEPAIR_PLUS, | |
640 | DIFF_SYMBOL_FILEPAIR_MINUS, | |
641 | DIFF_SYMBOL_WORDS_PORCELAIN, | |
642 | DIFF_SYMBOL_WORDS, | |
643 | DIFF_SYMBOL_CONTEXT, | |
644 | DIFF_SYMBOL_CONTEXT_INCOMPLETE, | |
645 | DIFF_SYMBOL_PLUS, | |
646 | DIFF_SYMBOL_MINUS, | |
647 | DIFF_SYMBOL_NO_LF_EOF, | |
648 | DIFF_SYMBOL_CONTEXT_FRAGINFO, | |
649 | DIFF_SYMBOL_CONTEXT_MARKER, | |
650 | DIFF_SYMBOL_SEPARATOR | |
651 | }; | |
652 | /* | |
653 | * Flags for content lines: | |
654 | * 0..12 are whitespace rules | |
655 | * 13-15 are WSEH_NEW | WSEH_OLD | WSEH_CONTEXT | |
656 | * 16 is marking if the line is blank at EOF | |
657 | */ | |
658 | #define DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF (1<<16) | |
659 | #define DIFF_SYMBOL_MOVED_LINE (1<<17) | |
660 | #define DIFF_SYMBOL_MOVED_LINE_ALT (1<<18) | |
661 | #define DIFF_SYMBOL_MOVED_LINE_UNINTERESTING (1<<19) | |
662 | #define DIFF_SYMBOL_CONTENT_WS_MASK (WSEH_NEW | WSEH_OLD | WSEH_CONTEXT | WS_RULE_MASK) | |
663 | ||
664 | /* | |
665 | * This struct is used when we need to buffer the output of the diff output. | |
666 | * | |
667 | * NEEDSWORK: Instead of storing a copy of the line, add an offset pointer | |
668 | * into the pre/post image file. This pointer could be a union with the | |
669 | * line pointer. By storing an offset into the file instead of the literal line, | |
670 | * we can decrease the memory footprint for the buffered output. At first we | |
671 | * may want to only have indirection for the content lines, but we could also | |
672 | * enhance the state for emitting prefabricated lines, e.g. the similarity | |
673 | * score line or hunk/file headers would only need to store a number or path | |
674 | * and then the output can be constructed later on depending on state. | |
675 | */ | |
676 | struct emitted_diff_symbol { | |
677 | const char *line; | |
678 | int len; | |
679 | int flags; | |
680 | enum diff_symbol s; | |
681 | }; | |
682 | #define EMITTED_DIFF_SYMBOL_INIT {NULL} | |
683 | ||
684 | struct emitted_diff_symbols { | |
685 | struct emitted_diff_symbol *buf; | |
686 | int nr, alloc; | |
687 | }; | |
688 | #define EMITTED_DIFF_SYMBOLS_INIT {NULL, 0, 0} | |
689 | ||
690 | static void append_emitted_diff_symbol(struct diff_options *o, | |
691 | struct emitted_diff_symbol *e) | |
692 | { | |
693 | struct emitted_diff_symbol *f; | |
694 | ||
695 | ALLOC_GROW(o->emitted_symbols->buf, | |
696 | o->emitted_symbols->nr + 1, | |
697 | o->emitted_symbols->alloc); | |
698 | f = &o->emitted_symbols->buf[o->emitted_symbols->nr++]; | |
699 | ||
700 | memcpy(f, e, sizeof(struct emitted_diff_symbol)); | |
701 | f->line = e->line ? xmemdupz(e->line, e->len) : NULL; | |
702 | } | |
703 | ||
704 | struct moved_entry { | |
705 | struct hashmap_entry ent; | |
706 | const struct emitted_diff_symbol *es; | |
707 | struct moved_entry *next_line; | |
708 | }; | |
709 | ||
710 | static int moved_entry_cmp(const struct diff_options *diffopt, | |
711 | const struct moved_entry *a, | |
712 | const struct moved_entry *b, | |
713 | const void *keydata) | |
714 | { | |
715 | return !xdiff_compare_lines(a->es->line, a->es->len, | |
716 | b->es->line, b->es->len, | |
717 | diffopt->xdl_opts); | |
718 | } | |
719 | ||
720 | static struct moved_entry *prepare_entry(struct diff_options *o, | |
721 | int line_no) | |
722 | { | |
723 | struct moved_entry *ret = xmalloc(sizeof(*ret)); | |
724 | struct emitted_diff_symbol *l = &o->emitted_symbols->buf[line_no]; | |
725 | ||
726 | ret->ent.hash = xdiff_hash_string(l->line, l->len, o->xdl_opts); | |
727 | ret->es = l; | |
728 | ret->next_line = NULL; | |
729 | ||
730 | return ret; | |
731 | } | |
732 | ||
733 | static void add_lines_to_move_detection(struct diff_options *o, | |
734 | struct hashmap *add_lines, | |
735 | struct hashmap *del_lines) | |
736 | { | |
737 | struct moved_entry *prev_line = NULL; | |
738 | ||
739 | int n; | |
740 | for (n = 0; n < o->emitted_symbols->nr; n++) { | |
741 | struct hashmap *hm; | |
742 | struct moved_entry *key; | |
743 | ||
744 | switch (o->emitted_symbols->buf[n].s) { | |
745 | case DIFF_SYMBOL_PLUS: | |
746 | hm = add_lines; | |
747 | break; | |
748 | case DIFF_SYMBOL_MINUS: | |
749 | hm = del_lines; | |
750 | break; | |
751 | default: | |
752 | prev_line = NULL; | |
753 | continue; | |
754 | } | |
755 | ||
756 | key = prepare_entry(o, n); | |
757 | if (prev_line && prev_line->es->s == o->emitted_symbols->buf[n].s) | |
758 | prev_line->next_line = key; | |
759 | ||
760 | hashmap_add(hm, key); | |
761 | prev_line = key; | |
762 | } | |
763 | } | |
764 | ||
765 | static int shrink_potential_moved_blocks(struct moved_entry **pmb, | |
766 | int pmb_nr) | |
767 | { | |
768 | int lp, rp; | |
769 | ||
770 | /* Shrink the set of potential block to the remaining running */ | |
771 | for (lp = 0, rp = pmb_nr - 1; lp <= rp;) { | |
772 | while (lp < pmb_nr && pmb[lp]) | |
773 | lp++; | |
774 | /* lp points at the first NULL now */ | |
775 | ||
776 | while (rp > -1 && !pmb[rp]) | |
777 | rp--; | |
778 | /* rp points at the last non-NULL */ | |
779 | ||
780 | if (lp < pmb_nr && rp > -1 && lp < rp) { | |
781 | pmb[lp] = pmb[rp]; | |
782 | pmb[rp] = NULL; | |
783 | rp--; | |
784 | lp++; | |
785 | } | |
786 | } | |
787 | ||
788 | /* Remember the number of running sets */ | |
789 | return rp + 1; | |
790 | } | |
791 | ||
792 | /* | |
793 | * If o->color_moved is COLOR_MOVED_PLAIN, this function does nothing. | |
794 | * | |
795 | * Otherwise, if the last block has fewer alphanumeric characters than | |
796 | * COLOR_MOVED_MIN_ALNUM_COUNT, unset DIFF_SYMBOL_MOVED_LINE on all lines in | |
797 | * that block. | |
798 | * | |
799 | * The last block consists of the (n - block_length)'th line up to but not | |
800 | * including the nth line. | |
801 | * | |
802 | * NEEDSWORK: This uses the same heuristic as blame_entry_score() in blame.c. | |
803 | * Think of a way to unify them. | |
804 | */ | |
805 | static void adjust_last_block(struct diff_options *o, int n, int block_length) | |
806 | { | |
807 | int i, alnum_count = 0; | |
808 | if (o->color_moved == COLOR_MOVED_PLAIN) | |
809 | return; | |
810 | for (i = 1; i < block_length + 1; i++) { | |
811 | const char *c = o->emitted_symbols->buf[n - i].line; | |
812 | for (; *c; c++) { | |
813 | if (!isalnum(*c)) | |
814 | continue; | |
815 | alnum_count++; | |
816 | if (alnum_count >= COLOR_MOVED_MIN_ALNUM_COUNT) | |
817 | return; | |
818 | } | |
819 | } | |
820 | for (i = 1; i < block_length + 1; i++) | |
821 | o->emitted_symbols->buf[n - i].flags &= ~DIFF_SYMBOL_MOVED_LINE; | |
822 | } | |
823 | ||
824 | /* Find blocks of moved code, delegate actual coloring decision to helper */ | |
825 | static void mark_color_as_moved(struct diff_options *o, | |
826 | struct hashmap *add_lines, | |
827 | struct hashmap *del_lines) | |
828 | { | |
829 | struct moved_entry **pmb = NULL; /* potentially moved blocks */ | |
830 | int pmb_nr = 0, pmb_alloc = 0; | |
831 | int n, flipped_block = 1, block_length = 0; | |
832 | ||
833 | ||
834 | for (n = 0; n < o->emitted_symbols->nr; n++) { | |
835 | struct hashmap *hm = NULL; | |
836 | struct moved_entry *key; | |
837 | struct moved_entry *match = NULL; | |
838 | struct emitted_diff_symbol *l = &o->emitted_symbols->buf[n]; | |
839 | int i; | |
840 | ||
841 | switch (l->s) { | |
842 | case DIFF_SYMBOL_PLUS: | |
843 | hm = del_lines; | |
844 | key = prepare_entry(o, n); | |
845 | match = hashmap_get(hm, key, o); | |
846 | free(key); | |
847 | break; | |
848 | case DIFF_SYMBOL_MINUS: | |
849 | hm = add_lines; | |
850 | key = prepare_entry(o, n); | |
851 | match = hashmap_get(hm, key, o); | |
852 | free(key); | |
853 | break; | |
854 | default: | |
855 | flipped_block = 1; | |
856 | } | |
857 | ||
858 | if (!match) { | |
859 | adjust_last_block(o, n, block_length); | |
860 | pmb_nr = 0; | |
861 | block_length = 0; | |
862 | continue; | |
863 | } | |
864 | ||
865 | l->flags |= DIFF_SYMBOL_MOVED_LINE; | |
866 | ||
867 | if (o->color_moved == COLOR_MOVED_PLAIN) | |
868 | continue; | |
869 | ||
870 | /* Check any potential block runs, advance each or nullify */ | |
871 | for (i = 0; i < pmb_nr; i++) { | |
872 | struct moved_entry *p = pmb[i]; | |
873 | struct moved_entry *pnext = (p && p->next_line) ? | |
874 | p->next_line : NULL; | |
875 | if (pnext && !hm->cmpfn(o, pnext, match, NULL)) { | |
876 | pmb[i] = p->next_line; | |
877 | } else { | |
878 | pmb[i] = NULL; | |
879 | } | |
880 | } | |
881 | ||
882 | pmb_nr = shrink_potential_moved_blocks(pmb, pmb_nr); | |
883 | ||
884 | if (pmb_nr == 0) { | |
885 | /* | |
886 | * The current line is the start of a new block. | |
887 | * Setup the set of potential blocks. | |
888 | */ | |
889 | for (; match; match = hashmap_get_next(hm, match)) { | |
890 | ALLOC_GROW(pmb, pmb_nr + 1, pmb_alloc); | |
891 | pmb[pmb_nr++] = match; | |
892 | } | |
893 | ||
894 | flipped_block = (flipped_block + 1) % 2; | |
895 | ||
896 | adjust_last_block(o, n, block_length); | |
897 | block_length = 0; | |
898 | } | |
899 | ||
900 | block_length++; | |
901 | ||
902 | if (flipped_block) | |
903 | l->flags |= DIFF_SYMBOL_MOVED_LINE_ALT; | |
904 | } | |
905 | adjust_last_block(o, n, block_length); | |
906 | ||
907 | free(pmb); | |
908 | } | |
909 | ||
910 | #define DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK \ | |
911 | (DIFF_SYMBOL_MOVED_LINE | DIFF_SYMBOL_MOVED_LINE_ALT) | |
912 | static void dim_moved_lines(struct diff_options *o) | |
913 | { | |
914 | int n; | |
915 | for (n = 0; n < o->emitted_symbols->nr; n++) { | |
916 | struct emitted_diff_symbol *prev = (n != 0) ? | |
917 | &o->emitted_symbols->buf[n - 1] : NULL; | |
918 | struct emitted_diff_symbol *l = &o->emitted_symbols->buf[n]; | |
919 | struct emitted_diff_symbol *next = | |
920 | (n < o->emitted_symbols->nr - 1) ? | |
921 | &o->emitted_symbols->buf[n + 1] : NULL; | |
922 | ||
923 | /* Not a plus or minus line? */ | |
924 | if (l->s != DIFF_SYMBOL_PLUS && l->s != DIFF_SYMBOL_MINUS) | |
925 | continue; | |
926 | ||
927 | /* Not a moved line? */ | |
928 | if (!(l->flags & DIFF_SYMBOL_MOVED_LINE)) | |
929 | continue; | |
930 | ||
931 | /* | |
932 | * If prev or next are not a plus or minus line, | |
933 | * pretend they don't exist | |
934 | */ | |
935 | if (prev && prev->s != DIFF_SYMBOL_PLUS && | |
936 | prev->s != DIFF_SYMBOL_MINUS) | |
937 | prev = NULL; | |
938 | if (next && next->s != DIFF_SYMBOL_PLUS && | |
939 | next->s != DIFF_SYMBOL_MINUS) | |
940 | next = NULL; | |
941 | ||
942 | /* Inside a block? */ | |
943 | if ((prev && | |
944 | (prev->flags & DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK) == | |
945 | (l->flags & DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK)) && | |
946 | (next && | |
947 | (next->flags & DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK) == | |
948 | (l->flags & DIFF_SYMBOL_MOVED_LINE_ZEBRA_MASK))) { | |
949 | l->flags |= DIFF_SYMBOL_MOVED_LINE_UNINTERESTING; | |
950 | continue; | |
951 | } | |
952 | ||
953 | /* Check if we are at an interesting bound: */ | |
954 | if (prev && (prev->flags & DIFF_SYMBOL_MOVED_LINE) && | |
955 | (prev->flags & DIFF_SYMBOL_MOVED_LINE_ALT) != | |
956 | (l->flags & DIFF_SYMBOL_MOVED_LINE_ALT)) | |
957 | continue; | |
958 | if (next && (next->flags & DIFF_SYMBOL_MOVED_LINE) && | |
959 | (next->flags & DIFF_SYMBOL_MOVED_LINE_ALT) != | |
960 | (l->flags & DIFF_SYMBOL_MOVED_LINE_ALT)) | |
961 | continue; | |
962 | ||
963 | /* | |
964 | * The boundary to prev and next are not interesting, | |
965 | * so this line is not interesting as a whole | |
966 | */ | |
967 | l->flags |= DIFF_SYMBOL_MOVED_LINE_UNINTERESTING; | |
968 | } | |
969 | } | |
970 | ||
971 | static void emit_line_ws_markup(struct diff_options *o, | |
972 | const char *set, const char *reset, | |
973 | const char *line, int len, char sign, | |
974 | unsigned ws_rule, int blank_at_eof) | |
975 | { | |
976 | const char *ws = NULL; | |
977 | ||
978 | if (o->ws_error_highlight & ws_rule) { | |
979 | ws = diff_get_color_opt(o, DIFF_WHITESPACE); | |
980 | if (!*ws) | |
981 | ws = NULL; | |
982 | } | |
983 | ||
984 | if (!ws) | |
985 | emit_line_0(o, set, reset, sign, line, len); | |
986 | else if (blank_at_eof) | |
987 | /* Blank line at EOF - paint '+' as well */ | |
988 | emit_line_0(o, ws, reset, sign, line, len); | |
989 | else { | |
990 | /* Emit just the prefix, then the rest. */ | |
991 | emit_line_0(o, set, reset, sign, "", 0); | |
992 | ws_check_emit(line, len, ws_rule, | |
993 | o->file, set, reset, ws); | |
994 | } | |
995 | } | |
996 | ||
997 | static void emit_diff_symbol_from_struct(struct diff_options *o, | |
998 | struct emitted_diff_symbol *eds) | |
999 | { | |
1000 | static const char *nneof = " No newline at end of file\n"; | |
1001 | const char *context, *reset, *set, *meta, *fraginfo; | |
1002 | struct strbuf sb = STRBUF_INIT; | |
1003 | ||
1004 | enum diff_symbol s = eds->s; | |
1005 | const char *line = eds->line; | |
1006 | int len = eds->len; | |
1007 | unsigned flags = eds->flags; | |
1008 | ||
1009 | switch (s) { | |
1010 | case DIFF_SYMBOL_NO_LF_EOF: | |
1011 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
1012 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1013 | putc('\n', o->file); | |
1014 | emit_line_0(o, context, reset, '\\', | |
1015 | nneof, strlen(nneof)); | |
1016 | break; | |
1017 | case DIFF_SYMBOL_SUBMODULE_HEADER: | |
1018 | case DIFF_SYMBOL_SUBMODULE_ERROR: | |
1019 | case DIFF_SYMBOL_SUBMODULE_PIPETHROUGH: | |
1020 | case DIFF_SYMBOL_STATS_SUMMARY_INSERTS_DELETES: | |
1021 | case DIFF_SYMBOL_SUMMARY: | |
1022 | case DIFF_SYMBOL_STATS_LINE: | |
1023 | case DIFF_SYMBOL_BINARY_DIFF_BODY: | |
1024 | case DIFF_SYMBOL_CONTEXT_FRAGINFO: | |
1025 | emit_line(o, "", "", line, len); | |
1026 | break; | |
1027 | case DIFF_SYMBOL_CONTEXT_INCOMPLETE: | |
1028 | case DIFF_SYMBOL_CONTEXT_MARKER: | |
1029 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
1030 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1031 | emit_line(o, context, reset, line, len); | |
1032 | break; | |
1033 | case DIFF_SYMBOL_SEPARATOR: | |
1034 | fprintf(o->file, "%s%c", | |
1035 | diff_line_prefix(o), | |
1036 | o->line_termination); | |
1037 | break; | |
1038 | case DIFF_SYMBOL_CONTEXT: | |
1039 | set = diff_get_color_opt(o, DIFF_CONTEXT); | |
1040 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1041 | emit_line_ws_markup(o, set, reset, line, len, ' ', | |
1042 | flags & (DIFF_SYMBOL_CONTENT_WS_MASK), 0); | |
1043 | break; | |
1044 | case DIFF_SYMBOL_PLUS: | |
1045 | switch (flags & (DIFF_SYMBOL_MOVED_LINE | | |
1046 | DIFF_SYMBOL_MOVED_LINE_ALT | | |
1047 | DIFF_SYMBOL_MOVED_LINE_UNINTERESTING)) { | |
1048 | case DIFF_SYMBOL_MOVED_LINE | | |
1049 | DIFF_SYMBOL_MOVED_LINE_ALT | | |
1050 | DIFF_SYMBOL_MOVED_LINE_UNINTERESTING: | |
1051 | set = diff_get_color_opt(o, DIFF_FILE_NEW_MOVED_ALT_DIM); | |
1052 | break; | |
1053 | case DIFF_SYMBOL_MOVED_LINE | | |
1054 | DIFF_SYMBOL_MOVED_LINE_ALT: | |
1055 | set = diff_get_color_opt(o, DIFF_FILE_NEW_MOVED_ALT); | |
1056 | break; | |
1057 | case DIFF_SYMBOL_MOVED_LINE | | |
1058 | DIFF_SYMBOL_MOVED_LINE_UNINTERESTING: | |
1059 | set = diff_get_color_opt(o, DIFF_FILE_NEW_MOVED_DIM); | |
1060 | break; | |
1061 | case DIFF_SYMBOL_MOVED_LINE: | |
1062 | set = diff_get_color_opt(o, DIFF_FILE_NEW_MOVED); | |
1063 | break; | |
1064 | default: | |
1065 | set = diff_get_color_opt(o, DIFF_FILE_NEW); | |
1066 | } | |
1067 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1068 | emit_line_ws_markup(o, set, reset, line, len, '+', | |
1069 | flags & DIFF_SYMBOL_CONTENT_WS_MASK, | |
1070 | flags & DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF); | |
1071 | break; | |
1072 | case DIFF_SYMBOL_MINUS: | |
1073 | switch (flags & (DIFF_SYMBOL_MOVED_LINE | | |
1074 | DIFF_SYMBOL_MOVED_LINE_ALT | | |
1075 | DIFF_SYMBOL_MOVED_LINE_UNINTERESTING)) { | |
1076 | case DIFF_SYMBOL_MOVED_LINE | | |
1077 | DIFF_SYMBOL_MOVED_LINE_ALT | | |
1078 | DIFF_SYMBOL_MOVED_LINE_UNINTERESTING: | |
1079 | set = diff_get_color_opt(o, DIFF_FILE_OLD_MOVED_ALT_DIM); | |
1080 | break; | |
1081 | case DIFF_SYMBOL_MOVED_LINE | | |
1082 | DIFF_SYMBOL_MOVED_LINE_ALT: | |
1083 | set = diff_get_color_opt(o, DIFF_FILE_OLD_MOVED_ALT); | |
1084 | break; | |
1085 | case DIFF_SYMBOL_MOVED_LINE | | |
1086 | DIFF_SYMBOL_MOVED_LINE_UNINTERESTING: | |
1087 | set = diff_get_color_opt(o, DIFF_FILE_OLD_MOVED_DIM); | |
1088 | break; | |
1089 | case DIFF_SYMBOL_MOVED_LINE: | |
1090 | set = diff_get_color_opt(o, DIFF_FILE_OLD_MOVED); | |
1091 | break; | |
1092 | default: | |
1093 | set = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1094 | } | |
1095 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1096 | emit_line_ws_markup(o, set, reset, line, len, '-', | |
1097 | flags & DIFF_SYMBOL_CONTENT_WS_MASK, 0); | |
1098 | break; | |
1099 | case DIFF_SYMBOL_WORDS_PORCELAIN: | |
1100 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
1101 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1102 | emit_line(o, context, reset, line, len); | |
1103 | fputs("~\n", o->file); | |
1104 | break; | |
1105 | case DIFF_SYMBOL_WORDS: | |
1106 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
1107 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1108 | /* | |
1109 | * Skip the prefix character, if any. With | |
1110 | * diff_suppress_blank_empty, there may be | |
1111 | * none. | |
1112 | */ | |
1113 | if (line[0] != '\n') { | |
1114 | line++; | |
1115 | len--; | |
1116 | } | |
1117 | emit_line(o, context, reset, line, len); | |
1118 | break; | |
1119 | case DIFF_SYMBOL_FILEPAIR_PLUS: | |
1120 | meta = diff_get_color_opt(o, DIFF_METAINFO); | |
1121 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1122 | fprintf(o->file, "%s%s+++ %s%s%s\n", diff_line_prefix(o), meta, | |
1123 | line, reset, | |
1124 | strchr(line, ' ') ? "\t" : ""); | |
1125 | break; | |
1126 | case DIFF_SYMBOL_FILEPAIR_MINUS: | |
1127 | meta = diff_get_color_opt(o, DIFF_METAINFO); | |
1128 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1129 | fprintf(o->file, "%s%s--- %s%s%s\n", diff_line_prefix(o), meta, | |
1130 | line, reset, | |
1131 | strchr(line, ' ') ? "\t" : ""); | |
1132 | break; | |
1133 | case DIFF_SYMBOL_BINARY_FILES: | |
1134 | case DIFF_SYMBOL_HEADER: | |
1135 | fprintf(o->file, "%s", line); | |
1136 | break; | |
1137 | case DIFF_SYMBOL_BINARY_DIFF_HEADER: | |
1138 | fprintf(o->file, "%sGIT binary patch\n", diff_line_prefix(o)); | |
1139 | break; | |
1140 | case DIFF_SYMBOL_BINARY_DIFF_HEADER_DELTA: | |
1141 | fprintf(o->file, "%sdelta %s\n", diff_line_prefix(o), line); | |
1142 | break; | |
1143 | case DIFF_SYMBOL_BINARY_DIFF_HEADER_LITERAL: | |
1144 | fprintf(o->file, "%sliteral %s\n", diff_line_prefix(o), line); | |
1145 | break; | |
1146 | case DIFF_SYMBOL_BINARY_DIFF_FOOTER: | |
1147 | fputs(diff_line_prefix(o), o->file); | |
1148 | fputc('\n', o->file); | |
1149 | break; | |
1150 | case DIFF_SYMBOL_REWRITE_DIFF: | |
1151 | fraginfo = diff_get_color(o->use_color, DIFF_FRAGINFO); | |
1152 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1153 | emit_line(o, fraginfo, reset, line, len); | |
1154 | break; | |
1155 | case DIFF_SYMBOL_SUBMODULE_ADD: | |
1156 | set = diff_get_color_opt(o, DIFF_FILE_NEW); | |
1157 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1158 | emit_line(o, set, reset, line, len); | |
1159 | break; | |
1160 | case DIFF_SYMBOL_SUBMODULE_DEL: | |
1161 | set = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1162 | reset = diff_get_color_opt(o, DIFF_RESET); | |
1163 | emit_line(o, set, reset, line, len); | |
1164 | break; | |
1165 | case DIFF_SYMBOL_SUBMODULE_UNTRACKED: | |
1166 | fprintf(o->file, "%sSubmodule %s contains untracked content\n", | |
1167 | diff_line_prefix(o), line); | |
1168 | break; | |
1169 | case DIFF_SYMBOL_SUBMODULE_MODIFIED: | |
1170 | fprintf(o->file, "%sSubmodule %s contains modified content\n", | |
1171 | diff_line_prefix(o), line); | |
1172 | break; | |
1173 | case DIFF_SYMBOL_STATS_SUMMARY_NO_FILES: | |
1174 | emit_line(o, "", "", " 0 files changed\n", | |
1175 | strlen(" 0 files changed\n")); | |
1176 | break; | |
1177 | case DIFF_SYMBOL_STATS_SUMMARY_ABBREV: | |
1178 | emit_line(o, "", "", " ...\n", strlen(" ...\n")); | |
1179 | break; | |
1180 | case DIFF_SYMBOL_WORD_DIFF: | |
1181 | fprintf(o->file, "%.*s", len, line); | |
1182 | break; | |
1183 | case DIFF_SYMBOL_STAT_SEP: | |
1184 | fputs(o->stat_sep, o->file); | |
1185 | break; | |
1186 | default: | |
1187 | die("BUG: unknown diff symbol"); | |
1188 | } | |
1189 | strbuf_release(&sb); | |
1190 | } | |
1191 | ||
1192 | static void emit_diff_symbol(struct diff_options *o, enum diff_symbol s, | |
1193 | const char *line, int len, unsigned flags) | |
1194 | { | |
1195 | struct emitted_diff_symbol e = {line, len, flags, s}; | |
1196 | ||
1197 | if (o->emitted_symbols) | |
1198 | append_emitted_diff_symbol(o, &e); | |
1199 | else | |
1200 | emit_diff_symbol_from_struct(o, &e); | |
1201 | } | |
1202 | ||
1203 | void diff_emit_submodule_del(struct diff_options *o, const char *line) | |
1204 | { | |
1205 | emit_diff_symbol(o, DIFF_SYMBOL_SUBMODULE_DEL, line, strlen(line), 0); | |
1206 | } | |
1207 | ||
1208 | void diff_emit_submodule_add(struct diff_options *o, const char *line) | |
1209 | { | |
1210 | emit_diff_symbol(o, DIFF_SYMBOL_SUBMODULE_ADD, line, strlen(line), 0); | |
1211 | } | |
1212 | ||
1213 | void diff_emit_submodule_untracked(struct diff_options *o, const char *path) | |
1214 | { | |
1215 | emit_diff_symbol(o, DIFF_SYMBOL_SUBMODULE_UNTRACKED, | |
1216 | path, strlen(path), 0); | |
1217 | } | |
1218 | ||
1219 | void diff_emit_submodule_modified(struct diff_options *o, const char *path) | |
1220 | { | |
1221 | emit_diff_symbol(o, DIFF_SYMBOL_SUBMODULE_MODIFIED, | |
1222 | path, strlen(path), 0); | |
1223 | } | |
1224 | ||
1225 | void diff_emit_submodule_header(struct diff_options *o, const char *header) | |
1226 | { | |
1227 | emit_diff_symbol(o, DIFF_SYMBOL_SUBMODULE_HEADER, | |
1228 | header, strlen(header), 0); | |
1229 | } | |
1230 | ||
1231 | void diff_emit_submodule_error(struct diff_options *o, const char *err) | |
1232 | { | |
1233 | emit_diff_symbol(o, DIFF_SYMBOL_SUBMODULE_ERROR, err, strlen(err), 0); | |
1234 | } | |
1235 | ||
1236 | void diff_emit_submodule_pipethrough(struct diff_options *o, | |
1237 | const char *line, int len) | |
1238 | { | |
1239 | emit_diff_symbol(o, DIFF_SYMBOL_SUBMODULE_PIPETHROUGH, line, len, 0); | |
1240 | } | |
1241 | ||
1242 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) | |
1243 | { | |
1244 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
1245 | ecbdata->blank_at_eof_in_preimage && | |
1246 | ecbdata->blank_at_eof_in_postimage && | |
1247 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
1248 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
1249 | return 0; | |
1250 | return ws_blank_line(line, len, ecbdata->ws_rule); | |
1251 | } | |
1252 | ||
1253 | static void emit_add_line(const char *reset, | |
1254 | struct emit_callback *ecbdata, | |
1255 | const char *line, int len) | |
1256 | { | |
1257 | unsigned flags = WSEH_NEW | ecbdata->ws_rule; | |
1258 | if (new_blank_line_at_eof(ecbdata, line, len)) | |
1259 | flags |= DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF; | |
1260 | ||
1261 | emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_PLUS, line, len, flags); | |
1262 | } | |
1263 | ||
1264 | static void emit_del_line(const char *reset, | |
1265 | struct emit_callback *ecbdata, | |
1266 | const char *line, int len) | |
1267 | { | |
1268 | unsigned flags = WSEH_OLD | ecbdata->ws_rule; | |
1269 | emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_MINUS, line, len, flags); | |
1270 | } | |
1271 | ||
1272 | static void emit_context_line(const char *reset, | |
1273 | struct emit_callback *ecbdata, | |
1274 | const char *line, int len) | |
1275 | { | |
1276 | unsigned flags = WSEH_CONTEXT | ecbdata->ws_rule; | |
1277 | emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_CONTEXT, line, len, flags); | |
1278 | } | |
1279 | ||
1280 | static void emit_hunk_header(struct emit_callback *ecbdata, | |
1281 | const char *line, int len) | |
1282 | { | |
1283 | const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT); | |
1284 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); | |
1285 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
1286 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
1287 | static const char atat[2] = { '@', '@' }; | |
1288 | const char *cp, *ep; | |
1289 | struct strbuf msgbuf = STRBUF_INIT; | |
1290 | int org_len = len; | |
1291 | int i = 1; | |
1292 | ||
1293 | /* | |
1294 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
1295 | * it always is at least 10 bytes long. | |
1296 | */ | |
1297 | if (len < 10 || | |
1298 | memcmp(line, atat, 2) || | |
1299 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
1300 | emit_diff_symbol(ecbdata->opt, | |
1301 | DIFF_SYMBOL_CONTEXT_MARKER, line, len, 0); | |
1302 | return; | |
1303 | } | |
1304 | ep += 2; /* skip over @@ */ | |
1305 | ||
1306 | /* The hunk header in fraginfo color */ | |
1307 | strbuf_addstr(&msgbuf, frag); | |
1308 | strbuf_add(&msgbuf, line, ep - line); | |
1309 | strbuf_addstr(&msgbuf, reset); | |
1310 | ||
1311 | /* | |
1312 | * trailing "\r\n" | |
1313 | */ | |
1314 | for ( ; i < 3; i++) | |
1315 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
1316 | len--; | |
1317 | ||
1318 | /* blank before the func header */ | |
1319 | for (cp = ep; ep - line < len; ep++) | |
1320 | if (*ep != ' ' && *ep != '\t') | |
1321 | break; | |
1322 | if (ep != cp) { | |
1323 | strbuf_addstr(&msgbuf, context); | |
1324 | strbuf_add(&msgbuf, cp, ep - cp); | |
1325 | strbuf_addstr(&msgbuf, reset); | |
1326 | } | |
1327 | ||
1328 | if (ep < line + len) { | |
1329 | strbuf_addstr(&msgbuf, func); | |
1330 | strbuf_add(&msgbuf, ep, line + len - ep); | |
1331 | strbuf_addstr(&msgbuf, reset); | |
1332 | } | |
1333 | ||
1334 | strbuf_add(&msgbuf, line + len, org_len - len); | |
1335 | strbuf_complete_line(&msgbuf); | |
1336 | emit_diff_symbol(ecbdata->opt, | |
1337 | DIFF_SYMBOL_CONTEXT_FRAGINFO, msgbuf.buf, msgbuf.len, 0); | |
1338 | strbuf_release(&msgbuf); | |
1339 | } | |
1340 | ||
1341 | static struct diff_tempfile *claim_diff_tempfile(void) { | |
1342 | int i; | |
1343 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
1344 | if (!diff_temp[i].name) | |
1345 | return diff_temp + i; | |
1346 | die("BUG: diff is failing to clean up its tempfiles"); | |
1347 | } | |
1348 | ||
1349 | static void remove_tempfile(void) | |
1350 | { | |
1351 | int i; | |
1352 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { | |
1353 | if (is_tempfile_active(diff_temp[i].tempfile)) | |
1354 | delete_tempfile(&diff_temp[i].tempfile); | |
1355 | diff_temp[i].name = NULL; | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | static void add_line_count(struct strbuf *out, int count) | |
1360 | { | |
1361 | switch (count) { | |
1362 | case 0: | |
1363 | strbuf_addstr(out, "0,0"); | |
1364 | break; | |
1365 | case 1: | |
1366 | strbuf_addstr(out, "1"); | |
1367 | break; | |
1368 | default: | |
1369 | strbuf_addf(out, "1,%d", count); | |
1370 | break; | |
1371 | } | |
1372 | } | |
1373 | ||
1374 | static void emit_rewrite_lines(struct emit_callback *ecb, | |
1375 | int prefix, const char *data, int size) | |
1376 | { | |
1377 | const char *endp = NULL; | |
1378 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); | |
1379 | ||
1380 | while (0 < size) { | |
1381 | int len; | |
1382 | ||
1383 | endp = memchr(data, '\n', size); | |
1384 | len = endp ? (endp - data + 1) : size; | |
1385 | if (prefix != '+') { | |
1386 | ecb->lno_in_preimage++; | |
1387 | emit_del_line(reset, ecb, data, len); | |
1388 | } else { | |
1389 | ecb->lno_in_postimage++; | |
1390 | emit_add_line(reset, ecb, data, len); | |
1391 | } | |
1392 | size -= len; | |
1393 | data += len; | |
1394 | } | |
1395 | if (!endp) | |
1396 | emit_diff_symbol(ecb->opt, DIFF_SYMBOL_NO_LF_EOF, NULL, 0, 0); | |
1397 | } | |
1398 | ||
1399 | static void emit_rewrite_diff(const char *name_a, | |
1400 | const char *name_b, | |
1401 | struct diff_filespec *one, | |
1402 | struct diff_filespec *two, | |
1403 | struct userdiff_driver *textconv_one, | |
1404 | struct userdiff_driver *textconv_two, | |
1405 | struct diff_options *o) | |
1406 | { | |
1407 | int lc_a, lc_b; | |
1408 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; | |
1409 | const char *a_prefix, *b_prefix; | |
1410 | char *data_one, *data_two; | |
1411 | size_t size_one, size_two; | |
1412 | struct emit_callback ecbdata; | |
1413 | struct strbuf out = STRBUF_INIT; | |
1414 | ||
1415 | if (diff_mnemonic_prefix && o->flags.reverse_diff) { | |
1416 | a_prefix = o->b_prefix; | |
1417 | b_prefix = o->a_prefix; | |
1418 | } else { | |
1419 | a_prefix = o->a_prefix; | |
1420 | b_prefix = o->b_prefix; | |
1421 | } | |
1422 | ||
1423 | name_a += (*name_a == '/'); | |
1424 | name_b += (*name_b == '/'); | |
1425 | ||
1426 | strbuf_reset(&a_name); | |
1427 | strbuf_reset(&b_name); | |
1428 | quote_two_c_style(&a_name, a_prefix, name_a, 0); | |
1429 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
1430 | ||
1431 | size_one = fill_textconv(textconv_one, one, &data_one); | |
1432 | size_two = fill_textconv(textconv_two, two, &data_two); | |
1433 | ||
1434 | memset(&ecbdata, 0, sizeof(ecbdata)); | |
1435 | ecbdata.color_diff = want_color(o->use_color); | |
1436 | ecbdata.ws_rule = whitespace_rule(name_b); | |
1437 | ecbdata.opt = o; | |
1438 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { | |
1439 | mmfile_t mf1, mf2; | |
1440 | mf1.ptr = (char *)data_one; | |
1441 | mf2.ptr = (char *)data_two; | |
1442 | mf1.size = size_one; | |
1443 | mf2.size = size_two; | |
1444 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
1445 | } | |
1446 | ecbdata.lno_in_preimage = 1; | |
1447 | ecbdata.lno_in_postimage = 1; | |
1448 | ||
1449 | lc_a = count_lines(data_one, size_one); | |
1450 | lc_b = count_lines(data_two, size_two); | |
1451 | ||
1452 | emit_diff_symbol(o, DIFF_SYMBOL_FILEPAIR_MINUS, | |
1453 | a_name.buf, a_name.len, 0); | |
1454 | emit_diff_symbol(o, DIFF_SYMBOL_FILEPAIR_PLUS, | |
1455 | b_name.buf, b_name.len, 0); | |
1456 | ||
1457 | strbuf_addstr(&out, "@@ -"); | |
1458 | if (!o->irreversible_delete) | |
1459 | add_line_count(&out, lc_a); | |
1460 | else | |
1461 | strbuf_addstr(&out, "?,?"); | |
1462 | strbuf_addstr(&out, " +"); | |
1463 | add_line_count(&out, lc_b); | |
1464 | strbuf_addstr(&out, " @@\n"); | |
1465 | emit_diff_symbol(o, DIFF_SYMBOL_REWRITE_DIFF, out.buf, out.len, 0); | |
1466 | strbuf_release(&out); | |
1467 | ||
1468 | if (lc_a && !o->irreversible_delete) | |
1469 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); | |
1470 | if (lc_b) | |
1471 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); | |
1472 | if (textconv_one) | |
1473 | free((char *)data_one); | |
1474 | if (textconv_two) | |
1475 | free((char *)data_two); | |
1476 | } | |
1477 | ||
1478 | struct diff_words_buffer { | |
1479 | mmfile_t text; | |
1480 | unsigned long alloc; | |
1481 | struct diff_words_orig { | |
1482 | const char *begin, *end; | |
1483 | } *orig; | |
1484 | int orig_nr, orig_alloc; | |
1485 | }; | |
1486 | ||
1487 | static void diff_words_append(char *line, unsigned long len, | |
1488 | struct diff_words_buffer *buffer) | |
1489 | { | |
1490 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); | |
1491 | line++; | |
1492 | len--; | |
1493 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
1494 | buffer->text.size += len; | |
1495 | buffer->text.ptr[buffer->text.size] = '\0'; | |
1496 | } | |
1497 | ||
1498 | struct diff_words_style_elem { | |
1499 | const char *prefix; | |
1500 | const char *suffix; | |
1501 | const char *color; /* NULL; filled in by the setup code if | |
1502 | * color is enabled */ | |
1503 | }; | |
1504 | ||
1505 | struct diff_words_style { | |
1506 | enum diff_words_type type; | |
1507 | struct diff_words_style_elem new_word, old_word, ctx; | |
1508 | const char *newline; | |
1509 | }; | |
1510 | ||
1511 | static struct diff_words_style diff_words_styles[] = { | |
1512 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, | |
1513 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
1514 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
1515 | }; | |
1516 | ||
1517 | struct diff_words_data { | |
1518 | struct diff_words_buffer minus, plus; | |
1519 | const char *current_plus; | |
1520 | int last_minus; | |
1521 | struct diff_options *opt; | |
1522 | regex_t *word_regex; | |
1523 | enum diff_words_type type; | |
1524 | struct diff_words_style *style; | |
1525 | }; | |
1526 | ||
1527 | static int fn_out_diff_words_write_helper(struct diff_options *o, | |
1528 | struct diff_words_style_elem *st_el, | |
1529 | const char *newline, | |
1530 | size_t count, const char *buf) | |
1531 | { | |
1532 | int print = 0; | |
1533 | struct strbuf sb = STRBUF_INIT; | |
1534 | ||
1535 | while (count) { | |
1536 | char *p = memchr(buf, '\n', count); | |
1537 | if (print) | |
1538 | strbuf_addstr(&sb, diff_line_prefix(o)); | |
1539 | ||
1540 | if (p != buf) { | |
1541 | const char *reset = st_el->color && *st_el->color ? | |
1542 | GIT_COLOR_RESET : NULL; | |
1543 | if (st_el->color && *st_el->color) | |
1544 | strbuf_addstr(&sb, st_el->color); | |
1545 | strbuf_addstr(&sb, st_el->prefix); | |
1546 | strbuf_add(&sb, buf, p ? p - buf : count); | |
1547 | strbuf_addstr(&sb, st_el->suffix); | |
1548 | if (reset) | |
1549 | strbuf_addstr(&sb, reset); | |
1550 | } | |
1551 | if (!p) | |
1552 | goto out; | |
1553 | ||
1554 | strbuf_addstr(&sb, newline); | |
1555 | count -= p + 1 - buf; | |
1556 | buf = p + 1; | |
1557 | print = 1; | |
1558 | if (count) { | |
1559 | emit_diff_symbol(o, DIFF_SYMBOL_WORD_DIFF, | |
1560 | sb.buf, sb.len, 0); | |
1561 | strbuf_reset(&sb); | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | out: | |
1566 | if (sb.len) | |
1567 | emit_diff_symbol(o, DIFF_SYMBOL_WORD_DIFF, | |
1568 | sb.buf, sb.len, 0); | |
1569 | strbuf_release(&sb); | |
1570 | return 0; | |
1571 | } | |
1572 | ||
1573 | /* | |
1574 | * '--color-words' algorithm can be described as: | |
1575 | * | |
1576 | * 1. collect the minus/plus lines of a diff hunk, divided into | |
1577 | * minus-lines and plus-lines; | |
1578 | * | |
1579 | * 2. break both minus-lines and plus-lines into words and | |
1580 | * place them into two mmfile_t with one word for each line; | |
1581 | * | |
1582 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
1583 | * | |
1584 | * And for the common parts of the both file, we output the plus side text. | |
1585 | * diff_words->current_plus is used to trace the current position of the plus file | |
1586 | * which printed. diff_words->last_minus is used to trace the last minus word | |
1587 | * printed. | |
1588 | * | |
1589 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
1590 | * on each line of color words output. Generally, there are two conditions on | |
1591 | * which we should output the prefix. | |
1592 | * | |
1593 | * 1. diff_words->last_minus == 0 && | |
1594 | * diff_words->current_plus == diff_words->plus.text.ptr | |
1595 | * | |
1596 | * that is: the plus text must start as a new line, and if there is no minus | |
1597 | * word printed, a graph prefix must be printed. | |
1598 | * | |
1599 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
1600 | * *(diff_words->current_plus - 1) == '\n' | |
1601 | * | |
1602 | * that is: a graph prefix must be printed following a '\n' | |
1603 | */ | |
1604 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
1605 | { | |
1606 | if ((diff_words->last_minus == 0 && | |
1607 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
1608 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
1609 | *(diff_words->current_plus - 1) == '\n')) { | |
1610 | return 1; | |
1611 | } else { | |
1612 | return 0; | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) | |
1617 | { | |
1618 | struct diff_words_data *diff_words = priv; | |
1619 | struct diff_words_style *style = diff_words->style; | |
1620 | int minus_first, minus_len, plus_first, plus_len; | |
1621 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
1622 | struct diff_options *opt = diff_words->opt; | |
1623 | const char *line_prefix; | |
1624 | ||
1625 | if (line[0] != '@' || parse_hunk_header(line, len, | |
1626 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
1627 | return; | |
1628 | ||
1629 | assert(opt); | |
1630 | line_prefix = diff_line_prefix(opt); | |
1631 | ||
1632 | /* POSIX requires that first be decremented by one if len == 0... */ | |
1633 | if (minus_len) { | |
1634 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
1635 | minus_end = | |
1636 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
1637 | } else | |
1638 | minus_begin = minus_end = | |
1639 | diff_words->minus.orig[minus_first].end; | |
1640 | ||
1641 | if (plus_len) { | |
1642 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
1643 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
1644 | } else | |
1645 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
1646 | ||
1647 | if (color_words_output_graph_prefix(diff_words)) { | |
1648 | fputs(line_prefix, diff_words->opt->file); | |
1649 | } | |
1650 | if (diff_words->current_plus != plus_begin) { | |
1651 | fn_out_diff_words_write_helper(diff_words->opt, | |
1652 | &style->ctx, style->newline, | |
1653 | plus_begin - diff_words->current_plus, | |
1654 | diff_words->current_plus); | |
1655 | } | |
1656 | if (minus_begin != minus_end) { | |
1657 | fn_out_diff_words_write_helper(diff_words->opt, | |
1658 | &style->old_word, style->newline, | |
1659 | minus_end - minus_begin, minus_begin); | |
1660 | } | |
1661 | if (plus_begin != plus_end) { | |
1662 | fn_out_diff_words_write_helper(diff_words->opt, | |
1663 | &style->new_word, style->newline, | |
1664 | plus_end - plus_begin, plus_begin); | |
1665 | } | |
1666 | ||
1667 | diff_words->current_plus = plus_end; | |
1668 | diff_words->last_minus = minus_first; | |
1669 | } | |
1670 | ||
1671 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ | |
1672 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
1673 | int *begin, int *end) | |
1674 | { | |
1675 | if (word_regex && *begin < buffer->size) { | |
1676 | regmatch_t match[1]; | |
1677 | if (!regexec_buf(word_regex, buffer->ptr + *begin, | |
1678 | buffer->size - *begin, 1, match, 0)) { | |
1679 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, | |
1680 | '\n', match[0].rm_eo - match[0].rm_so); | |
1681 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
1682 | *begin += match[0].rm_so; | |
1683 | return *begin >= *end; | |
1684 | } | |
1685 | return -1; | |
1686 | } | |
1687 | ||
1688 | /* find the next word */ | |
1689 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
1690 | (*begin)++; | |
1691 | if (*begin >= buffer->size) | |
1692 | return -1; | |
1693 | ||
1694 | /* find the end of the word */ | |
1695 | *end = *begin + 1; | |
1696 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
1697 | (*end)++; | |
1698 | ||
1699 | return 0; | |
1700 | } | |
1701 | ||
1702 | /* | |
1703 | * This function splits the words in buffer->text, stores the list with | |
1704 | * newline separator into out, and saves the offsets of the original words | |
1705 | * in buffer->orig. | |
1706 | */ | |
1707 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, | |
1708 | regex_t *word_regex) | |
1709 | { | |
1710 | int i, j; | |
1711 | long alloc = 0; | |
1712 | ||
1713 | out->size = 0; | |
1714 | out->ptr = NULL; | |
1715 | ||
1716 | /* fake an empty "0th" word */ | |
1717 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
1718 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
1719 | buffer->orig_nr = 1; | |
1720 | ||
1721 | for (i = 0; i < buffer->text.size; i++) { | |
1722 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) | |
1723 | return; | |
1724 | ||
1725 | /* store original boundaries */ | |
1726 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
1727 | buffer->orig_alloc); | |
1728 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
1729 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
1730 | buffer->orig_nr++; | |
1731 | ||
1732 | /* store one word */ | |
1733 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); | |
1734 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); | |
1735 | out->ptr[out->size + j - i] = '\n'; | |
1736 | out->size += j - i + 1; | |
1737 | ||
1738 | i = j - 1; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | /* this executes the word diff on the accumulated buffers */ | |
1743 | static void diff_words_show(struct diff_words_data *diff_words) | |
1744 | { | |
1745 | xpparam_t xpp; | |
1746 | xdemitconf_t xecfg; | |
1747 | mmfile_t minus, plus; | |
1748 | struct diff_words_style *style = diff_words->style; | |
1749 | ||
1750 | struct diff_options *opt = diff_words->opt; | |
1751 | const char *line_prefix; | |
1752 | ||
1753 | assert(opt); | |
1754 | line_prefix = diff_line_prefix(opt); | |
1755 | ||
1756 | /* special case: only removal */ | |
1757 | if (!diff_words->plus.text.size) { | |
1758 | emit_diff_symbol(diff_words->opt, DIFF_SYMBOL_WORD_DIFF, | |
1759 | line_prefix, strlen(line_prefix), 0); | |
1760 | fn_out_diff_words_write_helper(diff_words->opt, | |
1761 | &style->old_word, style->newline, | |
1762 | diff_words->minus.text.size, | |
1763 | diff_words->minus.text.ptr); | |
1764 | diff_words->minus.text.size = 0; | |
1765 | return; | |
1766 | } | |
1767 | ||
1768 | diff_words->current_plus = diff_words->plus.text.ptr; | |
1769 | diff_words->last_minus = 0; | |
1770 | ||
1771 | memset(&xpp, 0, sizeof(xpp)); | |
1772 | memset(&xecfg, 0, sizeof(xecfg)); | |
1773 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); | |
1774 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
1775 | xpp.flags = 0; | |
1776 | /* as only the hunk header will be parsed, we need a 0-context */ | |
1777 | xecfg.ctxlen = 0; | |
1778 | if (xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, | |
1779 | &xpp, &xecfg)) | |
1780 | die("unable to generate word diff"); | |
1781 | free(minus.ptr); | |
1782 | free(plus.ptr); | |
1783 | if (diff_words->current_plus != diff_words->plus.text.ptr + | |
1784 | diff_words->plus.text.size) { | |
1785 | if (color_words_output_graph_prefix(diff_words)) | |
1786 | emit_diff_symbol(diff_words->opt, DIFF_SYMBOL_WORD_DIFF, | |
1787 | line_prefix, strlen(line_prefix), 0); | |
1788 | fn_out_diff_words_write_helper(diff_words->opt, | |
1789 | &style->ctx, style->newline, | |
1790 | diff_words->plus.text.ptr + diff_words->plus.text.size | |
1791 | - diff_words->current_plus, diff_words->current_plus); | |
1792 | } | |
1793 | diff_words->minus.text.size = diff_words->plus.text.size = 0; | |
1794 | } | |
1795 | ||
1796 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ | |
1797 | static void diff_words_flush(struct emit_callback *ecbdata) | |
1798 | { | |
1799 | struct diff_options *wo = ecbdata->diff_words->opt; | |
1800 | ||
1801 | if (ecbdata->diff_words->minus.text.size || | |
1802 | ecbdata->diff_words->plus.text.size) | |
1803 | diff_words_show(ecbdata->diff_words); | |
1804 | ||
1805 | if (wo->emitted_symbols) { | |
1806 | struct diff_options *o = ecbdata->opt; | |
1807 | struct emitted_diff_symbols *wol = wo->emitted_symbols; | |
1808 | int i; | |
1809 | ||
1810 | /* | |
1811 | * NEEDSWORK: | |
1812 | * Instead of appending each, concat all words to a line? | |
1813 | */ | |
1814 | for (i = 0; i < wol->nr; i++) | |
1815 | append_emitted_diff_symbol(o, &wol->buf[i]); | |
1816 | ||
1817 | for (i = 0; i < wol->nr; i++) | |
1818 | free((void *)wol->buf[i].line); | |
1819 | ||
1820 | wol->nr = 0; | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | static void diff_filespec_load_driver(struct diff_filespec *one) | |
1825 | { | |
1826 | /* Use already-loaded driver */ | |
1827 | if (one->driver) | |
1828 | return; | |
1829 | ||
1830 | if (S_ISREG(one->mode)) | |
1831 | one->driver = userdiff_find_by_path(one->path); | |
1832 | ||
1833 | /* Fallback to default settings */ | |
1834 | if (!one->driver) | |
1835 | one->driver = userdiff_find_by_name("default"); | |
1836 | } | |
1837 | ||
1838 | static const char *userdiff_word_regex(struct diff_filespec *one) | |
1839 | { | |
1840 | diff_filespec_load_driver(one); | |
1841 | return one->driver->word_regex; | |
1842 | } | |
1843 | ||
1844 | static void init_diff_words_data(struct emit_callback *ecbdata, | |
1845 | struct diff_options *orig_opts, | |
1846 | struct diff_filespec *one, | |
1847 | struct diff_filespec *two) | |
1848 | { | |
1849 | int i; | |
1850 | struct diff_options *o = xmalloc(sizeof(struct diff_options)); | |
1851 | memcpy(o, orig_opts, sizeof(struct diff_options)); | |
1852 | ||
1853 | ecbdata->diff_words = | |
1854 | xcalloc(1, sizeof(struct diff_words_data)); | |
1855 | ecbdata->diff_words->type = o->word_diff; | |
1856 | ecbdata->diff_words->opt = o; | |
1857 | ||
1858 | if (orig_opts->emitted_symbols) | |
1859 | o->emitted_symbols = | |
1860 | xcalloc(1, sizeof(struct emitted_diff_symbols)); | |
1861 | ||
1862 | if (!o->word_regex) | |
1863 | o->word_regex = userdiff_word_regex(one); | |
1864 | if (!o->word_regex) | |
1865 | o->word_regex = userdiff_word_regex(two); | |
1866 | if (!o->word_regex) | |
1867 | o->word_regex = diff_word_regex_cfg; | |
1868 | if (o->word_regex) { | |
1869 | ecbdata->diff_words->word_regex = (regex_t *) | |
1870 | xmalloc(sizeof(regex_t)); | |
1871 | if (regcomp(ecbdata->diff_words->word_regex, | |
1872 | o->word_regex, | |
1873 | REG_EXTENDED | REG_NEWLINE)) | |
1874 | die ("Invalid regular expression: %s", | |
1875 | o->word_regex); | |
1876 | } | |
1877 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { | |
1878 | if (o->word_diff == diff_words_styles[i].type) { | |
1879 | ecbdata->diff_words->style = | |
1880 | &diff_words_styles[i]; | |
1881 | break; | |
1882 | } | |
1883 | } | |
1884 | if (want_color(o->use_color)) { | |
1885 | struct diff_words_style *st = ecbdata->diff_words->style; | |
1886 | st->old_word.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1887 | st->new_word.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
1888 | st->ctx.color = diff_get_color_opt(o, DIFF_CONTEXT); | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | static void free_diff_words_data(struct emit_callback *ecbdata) | |
1893 | { | |
1894 | if (ecbdata->diff_words) { | |
1895 | diff_words_flush(ecbdata); | |
1896 | free (ecbdata->diff_words->opt->emitted_symbols); | |
1897 | free (ecbdata->diff_words->opt); | |
1898 | free (ecbdata->diff_words->minus.text.ptr); | |
1899 | free (ecbdata->diff_words->minus.orig); | |
1900 | free (ecbdata->diff_words->plus.text.ptr); | |
1901 | free (ecbdata->diff_words->plus.orig); | |
1902 | if (ecbdata->diff_words->word_regex) { | |
1903 | regfree(ecbdata->diff_words->word_regex); | |
1904 | free(ecbdata->diff_words->word_regex); | |
1905 | } | |
1906 | FREE_AND_NULL(ecbdata->diff_words); | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | const char *diff_get_color(int diff_use_color, enum color_diff ix) | |
1911 | { | |
1912 | if (want_color(diff_use_color)) | |
1913 | return diff_colors[ix]; | |
1914 | return ""; | |
1915 | } | |
1916 | ||
1917 | const char *diff_line_prefix(struct diff_options *opt) | |
1918 | { | |
1919 | struct strbuf *msgbuf; | |
1920 | if (!opt->output_prefix) | |
1921 | return ""; | |
1922 | ||
1923 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
1924 | return msgbuf->buf; | |
1925 | } | |
1926 | ||
1927 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) | |
1928 | { | |
1929 | const char *cp; | |
1930 | unsigned long allot; | |
1931 | size_t l = len; | |
1932 | ||
1933 | cp = line; | |
1934 | allot = l; | |
1935 | while (0 < l) { | |
1936 | (void) utf8_width(&cp, &l); | |
1937 | if (!cp) | |
1938 | break; /* truncated in the middle? */ | |
1939 | } | |
1940 | return allot - l; | |
1941 | } | |
1942 | ||
1943 | static void find_lno(const char *line, struct emit_callback *ecbdata) | |
1944 | { | |
1945 | const char *p; | |
1946 | ecbdata->lno_in_preimage = 0; | |
1947 | ecbdata->lno_in_postimage = 0; | |
1948 | p = strchr(line, '-'); | |
1949 | if (!p) | |
1950 | return; /* cannot happen */ | |
1951 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
1952 | p = strchr(p, '+'); | |
1953 | if (!p) | |
1954 | return; /* cannot happen */ | |
1955 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
1956 | } | |
1957 | ||
1958 | static void fn_out_consume(void *priv, char *line, unsigned long len) | |
1959 | { | |
1960 | struct emit_callback *ecbdata = priv; | |
1961 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
1962 | struct diff_options *o = ecbdata->opt; | |
1963 | ||
1964 | o->found_changes = 1; | |
1965 | ||
1966 | if (ecbdata->header) { | |
1967 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, | |
1968 | ecbdata->header->buf, ecbdata->header->len, 0); | |
1969 | strbuf_reset(ecbdata->header); | |
1970 | ecbdata->header = NULL; | |
1971 | } | |
1972 | ||
1973 | if (ecbdata->label_path[0]) { | |
1974 | emit_diff_symbol(o, DIFF_SYMBOL_FILEPAIR_MINUS, | |
1975 | ecbdata->label_path[0], | |
1976 | strlen(ecbdata->label_path[0]), 0); | |
1977 | emit_diff_symbol(o, DIFF_SYMBOL_FILEPAIR_PLUS, | |
1978 | ecbdata->label_path[1], | |
1979 | strlen(ecbdata->label_path[1]), 0); | |
1980 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; | |
1981 | } | |
1982 | ||
1983 | if (diff_suppress_blank_empty | |
1984 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1985 | line[0] = '\n'; | |
1986 | len = 1; | |
1987 | } | |
1988 | ||
1989 | if (line[0] == '@') { | |
1990 | if (ecbdata->diff_words) | |
1991 | diff_words_flush(ecbdata); | |
1992 | len = sane_truncate_line(ecbdata, line, len); | |
1993 | find_lno(line, ecbdata); | |
1994 | emit_hunk_header(ecbdata, line, len); | |
1995 | return; | |
1996 | } | |
1997 | ||
1998 | if (ecbdata->diff_words) { | |
1999 | enum diff_symbol s = | |
2000 | ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN ? | |
2001 | DIFF_SYMBOL_WORDS_PORCELAIN : DIFF_SYMBOL_WORDS; | |
2002 | if (line[0] == '-') { | |
2003 | diff_words_append(line, len, | |
2004 | &ecbdata->diff_words->minus); | |
2005 | return; | |
2006 | } else if (line[0] == '+') { | |
2007 | diff_words_append(line, len, | |
2008 | &ecbdata->diff_words->plus); | |
2009 | return; | |
2010 | } else if (starts_with(line, "\\ ")) { | |
2011 | /* | |
2012 | * Eat the "no newline at eof" marker as if we | |
2013 | * saw a "+" or "-" line with nothing on it, | |
2014 | * and return without diff_words_flush() to | |
2015 | * defer processing. If this is the end of | |
2016 | * preimage, more "+" lines may come after it. | |
2017 | */ | |
2018 | return; | |
2019 | } | |
2020 | diff_words_flush(ecbdata); | |
2021 | emit_diff_symbol(o, s, line, len, 0); | |
2022 | return; | |
2023 | } | |
2024 | ||
2025 | switch (line[0]) { | |
2026 | case '+': | |
2027 | ecbdata->lno_in_postimage++; | |
2028 | emit_add_line(reset, ecbdata, line + 1, len - 1); | |
2029 | break; | |
2030 | case '-': | |
2031 | ecbdata->lno_in_preimage++; | |
2032 | emit_del_line(reset, ecbdata, line + 1, len - 1); | |
2033 | break; | |
2034 | case ' ': | |
2035 | ecbdata->lno_in_postimage++; | |
2036 | ecbdata->lno_in_preimage++; | |
2037 | emit_context_line(reset, ecbdata, line + 1, len - 1); | |
2038 | break; | |
2039 | default: | |
2040 | /* incomplete line at the end */ | |
2041 | ecbdata->lno_in_preimage++; | |
2042 | emit_diff_symbol(o, DIFF_SYMBOL_CONTEXT_INCOMPLETE, | |
2043 | line, len, 0); | |
2044 | break; | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | static char *pprint_rename(const char *a, const char *b) | |
2049 | { | |
2050 | const char *old_name = a; | |
2051 | const char *new_name = b; | |
2052 | struct strbuf name = STRBUF_INIT; | |
2053 | int pfx_length, sfx_length; | |
2054 | int pfx_adjust_for_slash; | |
2055 | int len_a = strlen(a); | |
2056 | int len_b = strlen(b); | |
2057 | int a_midlen, b_midlen; | |
2058 | int qlen_a = quote_c_style(a, NULL, NULL, 0); | |
2059 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
2060 | ||
2061 | if (qlen_a || qlen_b) { | |
2062 | quote_c_style(a, &name, NULL, 0); | |
2063 | strbuf_addstr(&name, " => "); | |
2064 | quote_c_style(b, &name, NULL, 0); | |
2065 | return strbuf_detach(&name, NULL); | |
2066 | } | |
2067 | ||
2068 | /* Find common prefix */ | |
2069 | pfx_length = 0; | |
2070 | while (*old_name && *new_name && *old_name == *new_name) { | |
2071 | if (*old_name == '/') | |
2072 | pfx_length = old_name - a + 1; | |
2073 | old_name++; | |
2074 | new_name++; | |
2075 | } | |
2076 | ||
2077 | /* Find common suffix */ | |
2078 | old_name = a + len_a; | |
2079 | new_name = b + len_b; | |
2080 | sfx_length = 0; | |
2081 | /* | |
2082 | * If there is a common prefix, it must end in a slash. In | |
2083 | * that case we let this loop run 1 into the prefix to see the | |
2084 | * same slash. | |
2085 | * | |
2086 | * If there is no common prefix, we cannot do this as it would | |
2087 | * underrun the input strings. | |
2088 | */ | |
2089 | pfx_adjust_for_slash = (pfx_length ? 1 : 0); | |
2090 | while (a + pfx_length - pfx_adjust_for_slash <= old_name && | |
2091 | b + pfx_length - pfx_adjust_for_slash <= new_name && | |
2092 | *old_name == *new_name) { | |
2093 | if (*old_name == '/') | |
2094 | sfx_length = len_a - (old_name - a); | |
2095 | old_name--; | |
2096 | new_name--; | |
2097 | } | |
2098 | ||
2099 | /* | |
2100 | * pfx{mid-a => mid-b}sfx | |
2101 | * {pfx-a => pfx-b}sfx | |
2102 | * pfx{sfx-a => sfx-b} | |
2103 | * name-a => name-b | |
2104 | */ | |
2105 | a_midlen = len_a - pfx_length - sfx_length; | |
2106 | b_midlen = len_b - pfx_length - sfx_length; | |
2107 | if (a_midlen < 0) | |
2108 | a_midlen = 0; | |
2109 | if (b_midlen < 0) | |
2110 | b_midlen = 0; | |
2111 | ||
2112 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
2113 | if (pfx_length + sfx_length) { | |
2114 | strbuf_add(&name, a, pfx_length); | |
2115 | strbuf_addch(&name, '{'); | |
2116 | } | |
2117 | strbuf_add(&name, a + pfx_length, a_midlen); | |
2118 | strbuf_addstr(&name, " => "); | |
2119 | strbuf_add(&name, b + pfx_length, b_midlen); | |
2120 | if (pfx_length + sfx_length) { | |
2121 | strbuf_addch(&name, '}'); | |
2122 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
2123 | } | |
2124 | return strbuf_detach(&name, NULL); | |
2125 | } | |
2126 | ||
2127 | struct diffstat_t { | |
2128 | int nr; | |
2129 | int alloc; | |
2130 | struct diffstat_file { | |
2131 | char *from_name; | |
2132 | char *name; | |
2133 | char *print_name; | |
2134 | unsigned is_unmerged:1; | |
2135 | unsigned is_binary:1; | |
2136 | unsigned is_renamed:1; | |
2137 | unsigned is_interesting:1; | |
2138 | uintmax_t added, deleted; | |
2139 | } **files; | |
2140 | }; | |
2141 | ||
2142 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
2143 | const char *name_a, | |
2144 | const char *name_b) | |
2145 | { | |
2146 | struct diffstat_file *x; | |
2147 | x = xcalloc(1, sizeof(*x)); | |
2148 | ALLOC_GROW(diffstat->files, diffstat->nr + 1, diffstat->alloc); | |
2149 | diffstat->files[diffstat->nr++] = x; | |
2150 | if (name_b) { | |
2151 | x->from_name = xstrdup(name_a); | |
2152 | x->name = xstrdup(name_b); | |
2153 | x->is_renamed = 1; | |
2154 | } | |
2155 | else { | |
2156 | x->from_name = NULL; | |
2157 | x->name = xstrdup(name_a); | |
2158 | } | |
2159 | return x; | |
2160 | } | |
2161 | ||
2162 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
2163 | { | |
2164 | struct diffstat_t *diffstat = priv; | |
2165 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
2166 | ||
2167 | if (line[0] == '+') | |
2168 | x->added++; | |
2169 | else if (line[0] == '-') | |
2170 | x->deleted++; | |
2171 | } | |
2172 | ||
2173 | const char mime_boundary_leader[] = "------------"; | |
2174 | ||
2175 | static int scale_linear(int it, int width, int max_change) | |
2176 | { | |
2177 | if (!it) | |
2178 | return 0; | |
2179 | /* | |
2180 | * make sure that at least one '-' or '+' is printed if | |
2181 | * there is any change to this path. The easiest way is to | |
2182 | * scale linearly as if the alloted width is one column shorter | |
2183 | * than it is, and then add 1 to the result. | |
2184 | */ | |
2185 | return 1 + (it * (width - 1) / max_change); | |
2186 | } | |
2187 | ||
2188 | static void show_graph(struct strbuf *out, char ch, int cnt, | |
2189 | const char *set, const char *reset) | |
2190 | { | |
2191 | if (cnt <= 0) | |
2192 | return; | |
2193 | strbuf_addstr(out, set); | |
2194 | strbuf_addchars(out, ch, cnt); | |
2195 | strbuf_addstr(out, reset); | |
2196 | } | |
2197 | ||
2198 | static void fill_print_name(struct diffstat_file *file) | |
2199 | { | |
2200 | char *pname; | |
2201 | ||
2202 | if (file->print_name) | |
2203 | return; | |
2204 | ||
2205 | if (!file->is_renamed) { | |
2206 | struct strbuf buf = STRBUF_INIT; | |
2207 | if (quote_c_style(file->name, &buf, NULL, 0)) { | |
2208 | pname = strbuf_detach(&buf, NULL); | |
2209 | } else { | |
2210 | pname = file->name; | |
2211 | strbuf_release(&buf); | |
2212 | } | |
2213 | } else { | |
2214 | pname = pprint_rename(file->from_name, file->name); | |
2215 | } | |
2216 | file->print_name = pname; | |
2217 | } | |
2218 | ||
2219 | static void print_stat_summary_inserts_deletes(struct diff_options *options, | |
2220 | int files, int insertions, int deletions) | |
2221 | { | |
2222 | struct strbuf sb = STRBUF_INIT; | |
2223 | ||
2224 | if (!files) { | |
2225 | assert(insertions == 0 && deletions == 0); | |
2226 | emit_diff_symbol(options, DIFF_SYMBOL_STATS_SUMMARY_NO_FILES, | |
2227 | NULL, 0, 0); | |
2228 | return; | |
2229 | } | |
2230 | ||
2231 | strbuf_addf(&sb, | |
2232 | (files == 1) ? " %d file changed" : " %d files changed", | |
2233 | files); | |
2234 | ||
2235 | /* | |
2236 | * For binary diff, the caller may want to print "x files | |
2237 | * changed" with insertions == 0 && deletions == 0. | |
2238 | * | |
2239 | * Not omitting "0 insertions(+), 0 deletions(-)" in this case | |
2240 | * is probably less confusing (i.e skip over "2 files changed | |
2241 | * but nothing about added/removed lines? Is this a bug in Git?"). | |
2242 | */ | |
2243 | if (insertions || deletions == 0) { | |
2244 | strbuf_addf(&sb, | |
2245 | (insertions == 1) ? ", %d insertion(+)" : ", %d insertions(+)", | |
2246 | insertions); | |
2247 | } | |
2248 | ||
2249 | if (deletions || insertions == 0) { | |
2250 | strbuf_addf(&sb, | |
2251 | (deletions == 1) ? ", %d deletion(-)" : ", %d deletions(-)", | |
2252 | deletions); | |
2253 | } | |
2254 | strbuf_addch(&sb, '\n'); | |
2255 | emit_diff_symbol(options, DIFF_SYMBOL_STATS_SUMMARY_INSERTS_DELETES, | |
2256 | sb.buf, sb.len, 0); | |
2257 | strbuf_release(&sb); | |
2258 | } | |
2259 | ||
2260 | void print_stat_summary(FILE *fp, int files, | |
2261 | int insertions, int deletions) | |
2262 | { | |
2263 | struct diff_options o; | |
2264 | memset(&o, 0, sizeof(o)); | |
2265 | o.file = fp; | |
2266 | ||
2267 | print_stat_summary_inserts_deletes(&o, files, insertions, deletions); | |
2268 | } | |
2269 | ||
2270 | static void show_stats(struct diffstat_t *data, struct diff_options *options) | |
2271 | { | |
2272 | int i, len, add, del, adds = 0, dels = 0; | |
2273 | uintmax_t max_change = 0, max_len = 0; | |
2274 | int total_files = data->nr, count; | |
2275 | int width, name_width, graph_width, number_width = 0, bin_width = 0; | |
2276 | const char *reset, *add_c, *del_c; | |
2277 | int extra_shown = 0; | |
2278 | const char *line_prefix = diff_line_prefix(options); | |
2279 | struct strbuf out = STRBUF_INIT; | |
2280 | ||
2281 | if (data->nr == 0) | |
2282 | return; | |
2283 | ||
2284 | count = options->stat_count ? options->stat_count : data->nr; | |
2285 | ||
2286 | reset = diff_get_color_opt(options, DIFF_RESET); | |
2287 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); | |
2288 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
2289 | ||
2290 | /* | |
2291 | * Find the longest filename and max number of changes | |
2292 | */ | |
2293 | for (i = 0; (i < count) && (i < data->nr); i++) { | |
2294 | struct diffstat_file *file = data->files[i]; | |
2295 | uintmax_t change = file->added + file->deleted; | |
2296 | ||
2297 | if (!file->is_interesting && (change == 0)) { | |
2298 | count++; /* not shown == room for one more */ | |
2299 | continue; | |
2300 | } | |
2301 | fill_print_name(file); | |
2302 | len = strlen(file->print_name); | |
2303 | if (max_len < len) | |
2304 | max_len = len; | |
2305 | ||
2306 | if (file->is_unmerged) { | |
2307 | /* "Unmerged" is 8 characters */ | |
2308 | bin_width = bin_width < 8 ? 8 : bin_width; | |
2309 | continue; | |
2310 | } | |
2311 | if (file->is_binary) { | |
2312 | /* "Bin XXX -> YYY bytes" */ | |
2313 | int w = 14 + decimal_width(file->added) | |
2314 | + decimal_width(file->deleted); | |
2315 | bin_width = bin_width < w ? w : bin_width; | |
2316 | /* Display change counts aligned with "Bin" */ | |
2317 | number_width = 3; | |
2318 | continue; | |
2319 | } | |
2320 | ||
2321 | if (max_change < change) | |
2322 | max_change = change; | |
2323 | } | |
2324 | count = i; /* where we can stop scanning in data->files[] */ | |
2325 | ||
2326 | /* | |
2327 | * We have width = stat_width or term_columns() columns total. | |
2328 | * We want a maximum of min(max_len, stat_name_width) for the name part. | |
2329 | * We want a maximum of min(max_change, stat_graph_width) for the +- part. | |
2330 | * We also need 1 for " " and 4 + decimal_width(max_change) | |
2331 | * for " | NNNN " and one the empty column at the end, altogether | |
2332 | * 6 + decimal_width(max_change). | |
2333 | * | |
2334 | * If there's not enough space, we will use the smaller of | |
2335 | * stat_name_width (if set) and 5/8*width for the filename, | |
2336 | * and the rest for constant elements + graph part, but no more | |
2337 | * than stat_graph_width for the graph part. | |
2338 | * (5/8 gives 50 for filename and 30 for the constant parts + graph | |
2339 | * for the standard terminal size). | |
2340 | * | |
2341 | * In other words: stat_width limits the maximum width, and | |
2342 | * stat_name_width fixes the maximum width of the filename, | |
2343 | * and is also used to divide available columns if there | |
2344 | * aren't enough. | |
2345 | * | |
2346 | * Binary files are displayed with "Bin XXX -> YYY bytes" | |
2347 | * instead of the change count and graph. This part is treated | |
2348 | * similarly to the graph part, except that it is not | |
2349 | * "scaled". If total width is too small to accommodate the | |
2350 | * guaranteed minimum width of the filename part and the | |
2351 | * separators and this message, this message will "overflow" | |
2352 | * making the line longer than the maximum width. | |
2353 | */ | |
2354 | ||
2355 | if (options->stat_width == -1) | |
2356 | width = term_columns() - strlen(line_prefix); | |
2357 | else | |
2358 | width = options->stat_width ? options->stat_width : 80; | |
2359 | number_width = decimal_width(max_change) > number_width ? | |
2360 | decimal_width(max_change) : number_width; | |
2361 | ||
2362 | if (options->stat_graph_width == -1) | |
2363 | options->stat_graph_width = diff_stat_graph_width; | |
2364 | ||
2365 | /* | |
2366 | * Guarantee 3/8*16==6 for the graph part | |
2367 | * and 5/8*16==10 for the filename part | |
2368 | */ | |
2369 | if (width < 16 + 6 + number_width) | |
2370 | width = 16 + 6 + number_width; | |
2371 | ||
2372 | /* | |
2373 | * First assign sizes that are wanted, ignoring available width. | |
2374 | * strlen("Bin XXX -> YYY bytes") == bin_width, and the part | |
2375 | * starting from "XXX" should fit in graph_width. | |
2376 | */ | |
2377 | graph_width = max_change + 4 > bin_width ? max_change : bin_width - 4; | |
2378 | if (options->stat_graph_width && | |
2379 | options->stat_graph_width < graph_width) | |
2380 | graph_width = options->stat_graph_width; | |
2381 | ||
2382 | name_width = (options->stat_name_width > 0 && | |
2383 | options->stat_name_width < max_len) ? | |
2384 | options->stat_name_width : max_len; | |
2385 | ||
2386 | /* | |
2387 | * Adjust adjustable widths not to exceed maximum width | |
2388 | */ | |
2389 | if (name_width + number_width + 6 + graph_width > width) { | |
2390 | if (graph_width > width * 3/8 - number_width - 6) { | |
2391 | graph_width = width * 3/8 - number_width - 6; | |
2392 | if (graph_width < 6) | |
2393 | graph_width = 6; | |
2394 | } | |
2395 | ||
2396 | if (options->stat_graph_width && | |
2397 | graph_width > options->stat_graph_width) | |
2398 | graph_width = options->stat_graph_width; | |
2399 | if (name_width > width - number_width - 6 - graph_width) | |
2400 | name_width = width - number_width - 6 - graph_width; | |
2401 | else | |
2402 | graph_width = width - number_width - 6 - name_width; | |
2403 | } | |
2404 | ||
2405 | /* | |
2406 | * From here name_width is the width of the name area, | |
2407 | * and graph_width is the width of the graph area. | |
2408 | * max_change is used to scale graph properly. | |
2409 | */ | |
2410 | for (i = 0; i < count; i++) { | |
2411 | const char *prefix = ""; | |
2412 | struct diffstat_file *file = data->files[i]; | |
2413 | char *name = file->print_name; | |
2414 | uintmax_t added = file->added; | |
2415 | uintmax_t deleted = file->deleted; | |
2416 | int name_len; | |
2417 | ||
2418 | if (!file->is_interesting && (added + deleted == 0)) | |
2419 | continue; | |
2420 | ||
2421 | /* | |
2422 | * "scale" the filename | |
2423 | */ | |
2424 | len = name_width; | |
2425 | name_len = strlen(name); | |
2426 | if (name_width < name_len) { | |
2427 | char *slash; | |
2428 | prefix = "..."; | |
2429 | len -= 3; | |
2430 | name += name_len - len; | |
2431 | slash = strchr(name, '/'); | |
2432 | if (slash) | |
2433 | name = slash; | |
2434 | } | |
2435 | ||
2436 | if (file->is_binary) { | |
2437 | strbuf_addf(&out, " %s%-*s |", prefix, len, name); | |
2438 | strbuf_addf(&out, " %*s", number_width, "Bin"); | |
2439 | if (!added && !deleted) { | |
2440 | strbuf_addch(&out, '\n'); | |
2441 | emit_diff_symbol(options, DIFF_SYMBOL_STATS_LINE, | |
2442 | out.buf, out.len, 0); | |
2443 | strbuf_reset(&out); | |
2444 | continue; | |
2445 | } | |
2446 | strbuf_addf(&out, " %s%"PRIuMAX"%s", | |
2447 | del_c, deleted, reset); | |
2448 | strbuf_addstr(&out, " -> "); | |
2449 | strbuf_addf(&out, "%s%"PRIuMAX"%s", | |
2450 | add_c, added, reset); | |
2451 | strbuf_addstr(&out, " bytes\n"); | |
2452 | emit_diff_symbol(options, DIFF_SYMBOL_STATS_LINE, | |
2453 | out.buf, out.len, 0); | |
2454 | strbuf_reset(&out); | |
2455 | continue; | |
2456 | } | |
2457 | else if (file->is_unmerged) { | |
2458 | strbuf_addf(&out, " %s%-*s |", prefix, len, name); | |
2459 | strbuf_addstr(&out, " Unmerged\n"); | |
2460 | emit_diff_symbol(options, DIFF_SYMBOL_STATS_LINE, | |
2461 | out.buf, out.len, 0); | |
2462 | strbuf_reset(&out); | |
2463 | continue; | |
2464 | } | |
2465 | ||
2466 | /* | |
2467 | * scale the add/delete | |
2468 | */ | |
2469 | add = added; | |
2470 | del = deleted; | |
2471 | ||
2472 | if (graph_width <= max_change) { | |
2473 | int total = scale_linear(add + del, graph_width, max_change); | |
2474 | if (total < 2 && add && del) | |
2475 | /* width >= 2 due to the sanity check */ | |
2476 | total = 2; | |
2477 | if (add < del) { | |
2478 | add = scale_linear(add, graph_width, max_change); | |
2479 | del = total - add; | |
2480 | } else { | |
2481 | del = scale_linear(del, graph_width, max_change); | |
2482 | add = total - del; | |
2483 | } | |
2484 | } | |
2485 | strbuf_addf(&out, " %s%-*s |", prefix, len, name); | |
2486 | strbuf_addf(&out, " %*"PRIuMAX"%s", | |
2487 | number_width, added + deleted, | |
2488 | added + deleted ? " " : ""); | |
2489 | show_graph(&out, '+', add, add_c, reset); | |
2490 | show_graph(&out, '-', del, del_c, reset); | |
2491 | strbuf_addch(&out, '\n'); | |
2492 | emit_diff_symbol(options, DIFF_SYMBOL_STATS_LINE, | |
2493 | out.buf, out.len, 0); | |
2494 | strbuf_reset(&out); | |
2495 | } | |
2496 | ||
2497 | for (i = 0; i < data->nr; i++) { | |
2498 | struct diffstat_file *file = data->files[i]; | |
2499 | uintmax_t added = file->added; | |
2500 | uintmax_t deleted = file->deleted; | |
2501 | ||
2502 | if (file->is_unmerged || | |
2503 | (!file->is_interesting && (added + deleted == 0))) { | |
2504 | total_files--; | |
2505 | continue; | |
2506 | } | |
2507 | ||
2508 | if (!file->is_binary) { | |
2509 | adds += added; | |
2510 | dels += deleted; | |
2511 | } | |
2512 | if (i < count) | |
2513 | continue; | |
2514 | if (!extra_shown) | |
2515 | emit_diff_symbol(options, | |
2516 | DIFF_SYMBOL_STATS_SUMMARY_ABBREV, | |
2517 | NULL, 0, 0); | |
2518 | extra_shown = 1; | |
2519 | } | |
2520 | ||
2521 | print_stat_summary_inserts_deletes(options, total_files, adds, dels); | |
2522 | strbuf_release(&out); | |
2523 | } | |
2524 | ||
2525 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) | |
2526 | { | |
2527 | int i, adds = 0, dels = 0, total_files = data->nr; | |
2528 | ||
2529 | if (data->nr == 0) | |
2530 | return; | |
2531 | ||
2532 | for (i = 0; i < data->nr; i++) { | |
2533 | int added = data->files[i]->added; | |
2534 | int deleted = data->files[i]->deleted; | |
2535 | ||
2536 | if (data->files[i]->is_unmerged || | |
2537 | (!data->files[i]->is_interesting && (added + deleted == 0))) { | |
2538 | total_files--; | |
2539 | } else if (!data->files[i]->is_binary) { /* don't count bytes */ | |
2540 | adds += added; | |
2541 | dels += deleted; | |
2542 | } | |
2543 | } | |
2544 | print_stat_summary_inserts_deletes(options, total_files, adds, dels); | |
2545 | } | |
2546 | ||
2547 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) | |
2548 | { | |
2549 | int i; | |
2550 | ||
2551 | if (data->nr == 0) | |
2552 | return; | |
2553 | ||
2554 | for (i = 0; i < data->nr; i++) { | |
2555 | struct diffstat_file *file = data->files[i]; | |
2556 | ||
2557 | fprintf(options->file, "%s", diff_line_prefix(options)); | |
2558 | ||
2559 | if (file->is_binary) | |
2560 | fprintf(options->file, "-\t-\t"); | |
2561 | else | |
2562 | fprintf(options->file, | |
2563 | "%"PRIuMAX"\t%"PRIuMAX"\t", | |
2564 | file->added, file->deleted); | |
2565 | if (options->line_termination) { | |
2566 | fill_print_name(file); | |
2567 | if (!file->is_renamed) | |
2568 | write_name_quoted(file->name, options->file, | |
2569 | options->line_termination); | |
2570 | else { | |
2571 | fputs(file->print_name, options->file); | |
2572 | putc(options->line_termination, options->file); | |
2573 | } | |
2574 | } else { | |
2575 | if (file->is_renamed) { | |
2576 | putc('\0', options->file); | |
2577 | write_name_quoted(file->from_name, options->file, '\0'); | |
2578 | } | |
2579 | write_name_quoted(file->name, options->file, '\0'); | |
2580 | } | |
2581 | } | |
2582 | } | |
2583 | ||
2584 | struct dirstat_file { | |
2585 | const char *name; | |
2586 | unsigned long changed; | |
2587 | }; | |
2588 | ||
2589 | struct dirstat_dir { | |
2590 | struct dirstat_file *files; | |
2591 | int alloc, nr, permille, cumulative; | |
2592 | }; | |
2593 | ||
2594 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, | |
2595 | unsigned long changed, const char *base, int baselen) | |
2596 | { | |
2597 | unsigned long sum_changes = 0; | |
2598 | unsigned int sources = 0; | |
2599 | const char *line_prefix = diff_line_prefix(opt); | |
2600 | ||
2601 | while (dir->nr) { | |
2602 | struct dirstat_file *f = dir->files; | |
2603 | int namelen = strlen(f->name); | |
2604 | unsigned long changes; | |
2605 | char *slash; | |
2606 | ||
2607 | if (namelen < baselen) | |
2608 | break; | |
2609 | if (memcmp(f->name, base, baselen)) | |
2610 | break; | |
2611 | slash = strchr(f->name + baselen, '/'); | |
2612 | if (slash) { | |
2613 | int newbaselen = slash + 1 - f->name; | |
2614 | changes = gather_dirstat(opt, dir, changed, f->name, newbaselen); | |
2615 | sources++; | |
2616 | } else { | |
2617 | changes = f->changed; | |
2618 | dir->files++; | |
2619 | dir->nr--; | |
2620 | sources += 2; | |
2621 | } | |
2622 | sum_changes += changes; | |
2623 | } | |
2624 | ||
2625 | /* | |
2626 | * We don't report dirstat's for | |
2627 | * - the top level | |
2628 | * - or cases where everything came from a single directory | |
2629 | * under this directory (sources == 1). | |
2630 | */ | |
2631 | if (baselen && sources != 1) { | |
2632 | if (sum_changes) { | |
2633 | int permille = sum_changes * 1000 / changed; | |
2634 | if (permille >= dir->permille) { | |
2635 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, | |
2636 | permille / 10, permille % 10, baselen, base); | |
2637 | if (!dir->cumulative) | |
2638 | return 0; | |
2639 | } | |
2640 | } | |
2641 | } | |
2642 | return sum_changes; | |
2643 | } | |
2644 | ||
2645 | static int dirstat_compare(const void *_a, const void *_b) | |
2646 | { | |
2647 | const struct dirstat_file *a = _a; | |
2648 | const struct dirstat_file *b = _b; | |
2649 | return strcmp(a->name, b->name); | |
2650 | } | |
2651 | ||
2652 | static void show_dirstat(struct diff_options *options) | |
2653 | { | |
2654 | int i; | |
2655 | unsigned long changed; | |
2656 | struct dirstat_dir dir; | |
2657 | struct diff_queue_struct *q = &diff_queued_diff; | |
2658 | ||
2659 | dir.files = NULL; | |
2660 | dir.alloc = 0; | |
2661 | dir.nr = 0; | |
2662 | dir.permille = options->dirstat_permille; | |
2663 | dir.cumulative = options->flags.dirstat_cumulative; | |
2664 | ||
2665 | changed = 0; | |
2666 | for (i = 0; i < q->nr; i++) { | |
2667 | struct diff_filepair *p = q->queue[i]; | |
2668 | const char *name; | |
2669 | unsigned long copied, added, damage; | |
2670 | int content_changed; | |
2671 | ||
2672 | name = p->two->path ? p->two->path : p->one->path; | |
2673 | ||
2674 | if (p->one->oid_valid && p->two->oid_valid) | |
2675 | content_changed = oidcmp(&p->one->oid, &p->two->oid); | |
2676 | else | |
2677 | content_changed = 1; | |
2678 | ||
2679 | if (!content_changed) { | |
2680 | /* | |
2681 | * The SHA1 has not changed, so pre-/post-content is | |
2682 | * identical. We can therefore skip looking at the | |
2683 | * file contents altogether. | |
2684 | */ | |
2685 | damage = 0; | |
2686 | goto found_damage; | |
2687 | } | |
2688 | ||
2689 | if (options->flags.dirstat_by_file) { | |
2690 | /* | |
2691 | * In --dirstat-by-file mode, we don't really need to | |
2692 | * look at the actual file contents at all. | |
2693 | * The fact that the SHA1 changed is enough for us to | |
2694 | * add this file to the list of results | |
2695 | * (with each file contributing equal damage). | |
2696 | */ | |
2697 | damage = 1; | |
2698 | goto found_damage; | |
2699 | } | |
2700 | ||
2701 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
2702 | diff_populate_filespec(p->one, 0); | |
2703 | diff_populate_filespec(p->two, 0); | |
2704 | diffcore_count_changes(p->one, p->two, NULL, NULL, | |
2705 | &copied, &added); | |
2706 | diff_free_filespec_data(p->one); | |
2707 | diff_free_filespec_data(p->two); | |
2708 | } else if (DIFF_FILE_VALID(p->one)) { | |
2709 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY); | |
2710 | copied = added = 0; | |
2711 | diff_free_filespec_data(p->one); | |
2712 | } else if (DIFF_FILE_VALID(p->two)) { | |
2713 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY); | |
2714 | copied = 0; | |
2715 | added = p->two->size; | |
2716 | diff_free_filespec_data(p->two); | |
2717 | } else | |
2718 | continue; | |
2719 | ||
2720 | /* | |
2721 | * Original minus copied is the removed material, | |
2722 | * added is the new material. They are both damages | |
2723 | * made to the preimage. | |
2724 | * If the resulting damage is zero, we know that | |
2725 | * diffcore_count_changes() considers the two entries to | |
2726 | * be identical, but since content_changed is true, we | |
2727 | * know that there must have been _some_ kind of change, | |
2728 | * so we force all entries to have damage > 0. | |
2729 | */ | |
2730 | damage = (p->one->size - copied) + added; | |
2731 | if (!damage) | |
2732 | damage = 1; | |
2733 | ||
2734 | found_damage: | |
2735 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
2736 | dir.files[dir.nr].name = name; | |
2737 | dir.files[dir.nr].changed = damage; | |
2738 | changed += damage; | |
2739 | dir.nr++; | |
2740 | } | |
2741 | ||
2742 | /* This can happen even with many files, if everything was renames */ | |
2743 | if (!changed) | |
2744 | return; | |
2745 | ||
2746 | /* Show all directories with more than x% of the changes */ | |
2747 | QSORT(dir.files, dir.nr, dirstat_compare); | |
2748 | gather_dirstat(options, &dir, changed, "", 0); | |
2749 | } | |
2750 | ||
2751 | static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) | |
2752 | { | |
2753 | int i; | |
2754 | unsigned long changed; | |
2755 | struct dirstat_dir dir; | |
2756 | ||
2757 | if (data->nr == 0) | |
2758 | return; | |
2759 | ||
2760 | dir.files = NULL; | |
2761 | dir.alloc = 0; | |
2762 | dir.nr = 0; | |
2763 | dir.permille = options->dirstat_permille; | |
2764 | dir.cumulative = options->flags.dirstat_cumulative; | |
2765 | ||
2766 | changed = 0; | |
2767 | for (i = 0; i < data->nr; i++) { | |
2768 | struct diffstat_file *file = data->files[i]; | |
2769 | unsigned long damage = file->added + file->deleted; | |
2770 | if (file->is_binary) | |
2771 | /* | |
2772 | * binary files counts bytes, not lines. Must find some | |
2773 | * way to normalize binary bytes vs. textual lines. | |
2774 | * The following heuristic assumes that there are 64 | |
2775 | * bytes per "line". | |
2776 | * This is stupid and ugly, but very cheap... | |
2777 | */ | |
2778 | damage = DIV_ROUND_UP(damage, 64); | |
2779 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
2780 | dir.files[dir.nr].name = file->name; | |
2781 | dir.files[dir.nr].changed = damage; | |
2782 | changed += damage; | |
2783 | dir.nr++; | |
2784 | } | |
2785 | ||
2786 | /* This can happen even with many files, if everything was renames */ | |
2787 | if (!changed) | |
2788 | return; | |
2789 | ||
2790 | /* Show all directories with more than x% of the changes */ | |
2791 | QSORT(dir.files, dir.nr, dirstat_compare); | |
2792 | gather_dirstat(options, &dir, changed, "", 0); | |
2793 | } | |
2794 | ||
2795 | static void free_diffstat_info(struct diffstat_t *diffstat) | |
2796 | { | |
2797 | int i; | |
2798 | for (i = 0; i < diffstat->nr; i++) { | |
2799 | struct diffstat_file *f = diffstat->files[i]; | |
2800 | if (f->name != f->print_name) | |
2801 | free(f->print_name); | |
2802 | free(f->name); | |
2803 | free(f->from_name); | |
2804 | free(f); | |
2805 | } | |
2806 | free(diffstat->files); | |
2807 | } | |
2808 | ||
2809 | struct checkdiff_t { | |
2810 | const char *filename; | |
2811 | int lineno; | |
2812 | int conflict_marker_size; | |
2813 | struct diff_options *o; | |
2814 | unsigned ws_rule; | |
2815 | unsigned status; | |
2816 | }; | |
2817 | ||
2818 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) | |
2819 | { | |
2820 | char firstchar; | |
2821 | int cnt; | |
2822 | ||
2823 | if (len < marker_size + 1) | |
2824 | return 0; | |
2825 | firstchar = line[0]; | |
2826 | switch (firstchar) { | |
2827 | case '=': case '>': case '<': case '|': | |
2828 | break; | |
2829 | default: | |
2830 | return 0; | |
2831 | } | |
2832 | for (cnt = 1; cnt < marker_size; cnt++) | |
2833 | if (line[cnt] != firstchar) | |
2834 | return 0; | |
2835 | /* line[1] thru line[marker_size-1] are same as firstchar */ | |
2836 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
2837 | return 0; | |
2838 | return 1; | |
2839 | } | |
2840 | ||
2841 | static void checkdiff_consume(void *priv, char *line, unsigned long len) | |
2842 | { | |
2843 | struct checkdiff_t *data = priv; | |
2844 | int marker_size = data->conflict_marker_size; | |
2845 | const char *ws = diff_get_color(data->o->use_color, DIFF_WHITESPACE); | |
2846 | const char *reset = diff_get_color(data->o->use_color, DIFF_RESET); | |
2847 | const char *set = diff_get_color(data->o->use_color, DIFF_FILE_NEW); | |
2848 | char *err; | |
2849 | const char *line_prefix; | |
2850 | ||
2851 | assert(data->o); | |
2852 | line_prefix = diff_line_prefix(data->o); | |
2853 | ||
2854 | if (line[0] == '+') { | |
2855 | unsigned bad; | |
2856 | data->lineno++; | |
2857 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { | |
2858 | data->status |= 1; | |
2859 | fprintf(data->o->file, | |
2860 | "%s%s:%d: leftover conflict marker\n", | |
2861 | line_prefix, data->filename, data->lineno); | |
2862 | } | |
2863 | bad = ws_check(line + 1, len - 1, data->ws_rule); | |
2864 | if (!bad) | |
2865 | return; | |
2866 | data->status |= bad; | |
2867 | err = whitespace_error_string(bad); | |
2868 | fprintf(data->o->file, "%s%s:%d: %s.\n", | |
2869 | line_prefix, data->filename, data->lineno, err); | |
2870 | free(err); | |
2871 | emit_line(data->o, set, reset, line, 1); | |
2872 | ws_check_emit(line + 1, len - 1, data->ws_rule, | |
2873 | data->o->file, set, reset, ws); | |
2874 | } else if (line[0] == ' ') { | |
2875 | data->lineno++; | |
2876 | } else if (line[0] == '@') { | |
2877 | char *plus = strchr(line, '+'); | |
2878 | if (plus) | |
2879 | data->lineno = strtol(plus, NULL, 10) - 1; | |
2880 | else | |
2881 | die("invalid diff"); | |
2882 | } | |
2883 | } | |
2884 | ||
2885 | static unsigned char *deflate_it(char *data, | |
2886 | unsigned long size, | |
2887 | unsigned long *result_size) | |
2888 | { | |
2889 | int bound; | |
2890 | unsigned char *deflated; | |
2891 | git_zstream stream; | |
2892 | ||
2893 | git_deflate_init(&stream, zlib_compression_level); | |
2894 | bound = git_deflate_bound(&stream, size); | |
2895 | deflated = xmalloc(bound); | |
2896 | stream.next_out = deflated; | |
2897 | stream.avail_out = bound; | |
2898 | ||
2899 | stream.next_in = (unsigned char *)data; | |
2900 | stream.avail_in = size; | |
2901 | while (git_deflate(&stream, Z_FINISH) == Z_OK) | |
2902 | ; /* nothing */ | |
2903 | git_deflate_end(&stream); | |
2904 | *result_size = stream.total_out; | |
2905 | return deflated; | |
2906 | } | |
2907 | ||
2908 | static void emit_binary_diff_body(struct diff_options *o, | |
2909 | mmfile_t *one, mmfile_t *two) | |
2910 | { | |
2911 | void *cp; | |
2912 | void *delta; | |
2913 | void *deflated; | |
2914 | void *data; | |
2915 | unsigned long orig_size; | |
2916 | unsigned long delta_size; | |
2917 | unsigned long deflate_size; | |
2918 | unsigned long data_size; | |
2919 | ||
2920 | /* We could do deflated delta, or we could do just deflated two, | |
2921 | * whichever is smaller. | |
2922 | */ | |
2923 | delta = NULL; | |
2924 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
2925 | if (one->size && two->size) { | |
2926 | delta = diff_delta(one->ptr, one->size, | |
2927 | two->ptr, two->size, | |
2928 | &delta_size, deflate_size); | |
2929 | if (delta) { | |
2930 | void *to_free = delta; | |
2931 | orig_size = delta_size; | |
2932 | delta = deflate_it(delta, delta_size, &delta_size); | |
2933 | free(to_free); | |
2934 | } | |
2935 | } | |
2936 | ||
2937 | if (delta && delta_size < deflate_size) { | |
2938 | char *s = xstrfmt("%lu", orig_size); | |
2939 | emit_diff_symbol(o, DIFF_SYMBOL_BINARY_DIFF_HEADER_DELTA, | |
2940 | s, strlen(s), 0); | |
2941 | free(s); | |
2942 | free(deflated); | |
2943 | data = delta; | |
2944 | data_size = delta_size; | |
2945 | } else { | |
2946 | char *s = xstrfmt("%lu", two->size); | |
2947 | emit_diff_symbol(o, DIFF_SYMBOL_BINARY_DIFF_HEADER_LITERAL, | |
2948 | s, strlen(s), 0); | |
2949 | free(s); | |
2950 | free(delta); | |
2951 | data = deflated; | |
2952 | data_size = deflate_size; | |
2953 | } | |
2954 | ||
2955 | /* emit data encoded in base85 */ | |
2956 | cp = data; | |
2957 | while (data_size) { | |
2958 | int len; | |
2959 | int bytes = (52 < data_size) ? 52 : data_size; | |
2960 | char line[71]; | |
2961 | data_size -= bytes; | |
2962 | if (bytes <= 26) | |
2963 | line[0] = bytes + 'A' - 1; | |
2964 | else | |
2965 | line[0] = bytes - 26 + 'a' - 1; | |
2966 | encode_85(line + 1, cp, bytes); | |
2967 | cp = (char *) cp + bytes; | |
2968 | ||
2969 | len = strlen(line); | |
2970 | line[len++] = '\n'; | |
2971 | line[len] = '\0'; | |
2972 | ||
2973 | emit_diff_symbol(o, DIFF_SYMBOL_BINARY_DIFF_BODY, | |
2974 | line, len, 0); | |
2975 | } | |
2976 | emit_diff_symbol(o, DIFF_SYMBOL_BINARY_DIFF_FOOTER, NULL, 0, 0); | |
2977 | free(data); | |
2978 | } | |
2979 | ||
2980 | static void emit_binary_diff(struct diff_options *o, | |
2981 | mmfile_t *one, mmfile_t *two) | |
2982 | { | |
2983 | emit_diff_symbol(o, DIFF_SYMBOL_BINARY_DIFF_HEADER, NULL, 0, 0); | |
2984 | emit_binary_diff_body(o, one, two); | |
2985 | emit_binary_diff_body(o, two, one); | |
2986 | } | |
2987 | ||
2988 | int diff_filespec_is_binary(struct diff_filespec *one) | |
2989 | { | |
2990 | if (one->is_binary == -1) { | |
2991 | diff_filespec_load_driver(one); | |
2992 | if (one->driver->binary != -1) | |
2993 | one->is_binary = one->driver->binary; | |
2994 | else { | |
2995 | if (!one->data && DIFF_FILE_VALID(one)) | |
2996 | diff_populate_filespec(one, CHECK_BINARY); | |
2997 | if (one->is_binary == -1 && one->data) | |
2998 | one->is_binary = buffer_is_binary(one->data, | |
2999 | one->size); | |
3000 | if (one->is_binary == -1) | |
3001 | one->is_binary = 0; | |
3002 | } | |
3003 | } | |
3004 | return one->is_binary; | |
3005 | } | |
3006 | ||
3007 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) | |
3008 | { | |
3009 | diff_filespec_load_driver(one); | |
3010 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
3011 | } | |
3012 | ||
3013 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) | |
3014 | { | |
3015 | if (!options->a_prefix) | |
3016 | options->a_prefix = a; | |
3017 | if (!options->b_prefix) | |
3018 | options->b_prefix = b; | |
3019 | } | |
3020 | ||
3021 | struct userdiff_driver *get_textconv(struct diff_filespec *one) | |
3022 | { | |
3023 | if (!DIFF_FILE_VALID(one)) | |
3024 | return NULL; | |
3025 | ||
3026 | diff_filespec_load_driver(one); | |
3027 | return userdiff_get_textconv(one->driver); | |
3028 | } | |
3029 | ||
3030 | static void builtin_diff(const char *name_a, | |
3031 | const char *name_b, | |
3032 | struct diff_filespec *one, | |
3033 | struct diff_filespec *two, | |
3034 | const char *xfrm_msg, | |
3035 | int must_show_header, | |
3036 | struct diff_options *o, | |
3037 | int complete_rewrite) | |
3038 | { | |
3039 | mmfile_t mf1, mf2; | |
3040 | const char *lbl[2]; | |
3041 | char *a_one, *b_two; | |
3042 | const char *meta = diff_get_color_opt(o, DIFF_METAINFO); | |
3043 | const char *reset = diff_get_color_opt(o, DIFF_RESET); | |
3044 | const char *a_prefix, *b_prefix; | |
3045 | struct userdiff_driver *textconv_one = NULL; | |
3046 | struct userdiff_driver *textconv_two = NULL; | |
3047 | struct strbuf header = STRBUF_INIT; | |
3048 | const char *line_prefix = diff_line_prefix(o); | |
3049 | ||
3050 | diff_set_mnemonic_prefix(o, "a/", "b/"); | |
3051 | if (o->flags.reverse_diff) { | |
3052 | a_prefix = o->b_prefix; | |
3053 | b_prefix = o->a_prefix; | |
3054 | } else { | |
3055 | a_prefix = o->a_prefix; | |
3056 | b_prefix = o->b_prefix; | |
3057 | } | |
3058 | ||
3059 | if (o->submodule_format == DIFF_SUBMODULE_LOG && | |
3060 | (!one->mode || S_ISGITLINK(one->mode)) && | |
3061 | (!two->mode || S_ISGITLINK(two->mode))) { | |
3062 | show_submodule_summary(o, one->path ? one->path : two->path, | |
3063 | &one->oid, &two->oid, | |
3064 | two->dirty_submodule); | |
3065 | return; | |
3066 | } else if (o->submodule_format == DIFF_SUBMODULE_INLINE_DIFF && | |
3067 | (!one->mode || S_ISGITLINK(one->mode)) && | |
3068 | (!two->mode || S_ISGITLINK(two->mode))) { | |
3069 | show_submodule_inline_diff(o, one->path ? one->path : two->path, | |
3070 | &one->oid, &two->oid, | |
3071 | two->dirty_submodule); | |
3072 | return; | |
3073 | } | |
3074 | ||
3075 | if (o->flags.allow_textconv) { | |
3076 | textconv_one = get_textconv(one); | |
3077 | textconv_two = get_textconv(two); | |
3078 | } | |
3079 | ||
3080 | /* Never use a non-valid filename anywhere if at all possible */ | |
3081 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
3082 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
3083 | ||
3084 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); | |
3085 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
3086 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; | |
3087 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
3088 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, meta, a_one, b_two, reset); | |
3089 | if (lbl[0][0] == '/') { | |
3090 | /* /dev/null */ | |
3091 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, meta, two->mode, reset); | |
3092 | if (xfrm_msg) | |
3093 | strbuf_addstr(&header, xfrm_msg); | |
3094 | must_show_header = 1; | |
3095 | } | |
3096 | else if (lbl[1][0] == '/') { | |
3097 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, meta, one->mode, reset); | |
3098 | if (xfrm_msg) | |
3099 | strbuf_addstr(&header, xfrm_msg); | |
3100 | must_show_header = 1; | |
3101 | } | |
3102 | else { | |
3103 | if (one->mode != two->mode) { | |
3104 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, meta, one->mode, reset); | |
3105 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, meta, two->mode, reset); | |
3106 | must_show_header = 1; | |
3107 | } | |
3108 | if (xfrm_msg) | |
3109 | strbuf_addstr(&header, xfrm_msg); | |
3110 | ||
3111 | /* | |
3112 | * we do not run diff between different kind | |
3113 | * of objects. | |
3114 | */ | |
3115 | if ((one->mode ^ two->mode) & S_IFMT) | |
3116 | goto free_ab_and_return; | |
3117 | if (complete_rewrite && | |
3118 | (textconv_one || !diff_filespec_is_binary(one)) && | |
3119 | (textconv_two || !diff_filespec_is_binary(two))) { | |
3120 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, | |
3121 | header.buf, header.len, 0); | |
3122 | strbuf_reset(&header); | |
3123 | emit_rewrite_diff(name_a, name_b, one, two, | |
3124 | textconv_one, textconv_two, o); | |
3125 | o->found_changes = 1; | |
3126 | goto free_ab_and_return; | |
3127 | } | |
3128 | } | |
3129 | ||
3130 | if (o->irreversible_delete && lbl[1][0] == '/') { | |
3131 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, header.buf, | |
3132 | header.len, 0); | |
3133 | strbuf_reset(&header); | |
3134 | goto free_ab_and_return; | |
3135 | } else if (!o->flags.text && | |
3136 | ( (!textconv_one && diff_filespec_is_binary(one)) || | |
3137 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
3138 | struct strbuf sb = STRBUF_INIT; | |
3139 | if (!one->data && !two->data && | |
3140 | S_ISREG(one->mode) && S_ISREG(two->mode) && | |
3141 | !o->flags.binary) { | |
3142 | if (!oidcmp(&one->oid, &two->oid)) { | |
3143 | if (must_show_header) | |
3144 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, | |
3145 | header.buf, header.len, | |
3146 | 0); | |
3147 | goto free_ab_and_return; | |
3148 | } | |
3149 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, | |
3150 | header.buf, header.len, 0); | |
3151 | strbuf_addf(&sb, "%sBinary files %s and %s differ\n", | |
3152 | diff_line_prefix(o), lbl[0], lbl[1]); | |
3153 | emit_diff_symbol(o, DIFF_SYMBOL_BINARY_FILES, | |
3154 | sb.buf, sb.len, 0); | |
3155 | strbuf_release(&sb); | |
3156 | goto free_ab_and_return; | |
3157 | } | |
3158 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
3159 | die("unable to read files to diff"); | |
3160 | /* Quite common confusing case */ | |
3161 | if (mf1.size == mf2.size && | |
3162 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { | |
3163 | if (must_show_header) | |
3164 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, | |
3165 | header.buf, header.len, 0); | |
3166 | goto free_ab_and_return; | |
3167 | } | |
3168 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, header.buf, header.len, 0); | |
3169 | strbuf_reset(&header); | |
3170 | if (o->flags.binary) | |
3171 | emit_binary_diff(o, &mf1, &mf2); | |
3172 | else { | |
3173 | strbuf_addf(&sb, "%sBinary files %s and %s differ\n", | |
3174 | diff_line_prefix(o), lbl[0], lbl[1]); | |
3175 | emit_diff_symbol(o, DIFF_SYMBOL_BINARY_FILES, | |
3176 | sb.buf, sb.len, 0); | |
3177 | strbuf_release(&sb); | |
3178 | } | |
3179 | o->found_changes = 1; | |
3180 | } else { | |
3181 | /* Crazy xdl interfaces.. */ | |
3182 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
3183 | const char *v; | |
3184 | xpparam_t xpp; | |
3185 | xdemitconf_t xecfg; | |
3186 | struct emit_callback ecbdata; | |
3187 | const struct userdiff_funcname *pe; | |
3188 | ||
3189 | if (must_show_header) { | |
3190 | emit_diff_symbol(o, DIFF_SYMBOL_HEADER, | |
3191 | header.buf, header.len, 0); | |
3192 | strbuf_reset(&header); | |
3193 | } | |
3194 | ||
3195 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); | |
3196 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
3197 | ||
3198 | pe = diff_funcname_pattern(one); | |
3199 | if (!pe) | |
3200 | pe = diff_funcname_pattern(two); | |
3201 | ||
3202 | memset(&xpp, 0, sizeof(xpp)); | |
3203 | memset(&xecfg, 0, sizeof(xecfg)); | |
3204 | memset(&ecbdata, 0, sizeof(ecbdata)); | |
3205 | ecbdata.label_path = lbl; | |
3206 | ecbdata.color_diff = want_color(o->use_color); | |
3207 | ecbdata.ws_rule = whitespace_rule(name_b); | |
3208 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) | |
3209 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
3210 | ecbdata.opt = o; | |
3211 | ecbdata.header = header.len ? &header : NULL; | |
3212 | xpp.flags = o->xdl_opts; | |
3213 | xpp.anchors = o->anchors; | |
3214 | xpp.anchors_nr = o->anchors_nr; | |
3215 | xecfg.ctxlen = o->context; | |
3216 | xecfg.interhunkctxlen = o->interhunkcontext; | |
3217 | xecfg.flags = XDL_EMIT_FUNCNAMES; | |
3218 | if (o->flags.funccontext) | |
3219 | xecfg.flags |= XDL_EMIT_FUNCCONTEXT; | |
3220 | if (pe) | |
3221 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); | |
3222 | if (!diffopts) | |
3223 | ; | |
3224 | else if (skip_prefix(diffopts, "--unified=", &v)) | |
3225 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
3226 | else if (skip_prefix(diffopts, "-u", &v)) | |
3227 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
3228 | if (o->word_diff) | |
3229 | init_diff_words_data(&ecbdata, o, one, two); | |
3230 | if (xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, | |
3231 | &xpp, &xecfg)) | |
3232 | die("unable to generate diff for %s", one->path); | |
3233 | if (o->word_diff) | |
3234 | free_diff_words_data(&ecbdata); | |
3235 | if (textconv_one) | |
3236 | free(mf1.ptr); | |
3237 | if (textconv_two) | |
3238 | free(mf2.ptr); | |
3239 | xdiff_clear_find_func(&xecfg); | |
3240 | } | |
3241 | ||
3242 | free_ab_and_return: | |
3243 | strbuf_release(&header); | |
3244 | diff_free_filespec_data(one); | |
3245 | diff_free_filespec_data(two); | |
3246 | free(a_one); | |
3247 | free(b_two); | |
3248 | return; | |
3249 | } | |
3250 | ||
3251 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
3252 | struct diff_filespec *one, | |
3253 | struct diff_filespec *two, | |
3254 | struct diffstat_t *diffstat, | |
3255 | struct diff_options *o, | |
3256 | struct diff_filepair *p) | |
3257 | { | |
3258 | mmfile_t mf1, mf2; | |
3259 | struct diffstat_file *data; | |
3260 | int same_contents; | |
3261 | int complete_rewrite = 0; | |
3262 | ||
3263 | if (!DIFF_PAIR_UNMERGED(p)) { | |
3264 | if (p->status == DIFF_STATUS_MODIFIED && p->score) | |
3265 | complete_rewrite = 1; | |
3266 | } | |
3267 | ||
3268 | data = diffstat_add(diffstat, name_a, name_b); | |
3269 | data->is_interesting = p->status != DIFF_STATUS_UNKNOWN; | |
3270 | ||
3271 | if (!one || !two) { | |
3272 | data->is_unmerged = 1; | |
3273 | return; | |
3274 | } | |
3275 | ||
3276 | same_contents = !oidcmp(&one->oid, &two->oid); | |
3277 | ||
3278 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { | |
3279 | data->is_binary = 1; | |
3280 | if (same_contents) { | |
3281 | data->added = 0; | |
3282 | data->deleted = 0; | |
3283 | } else { | |
3284 | data->added = diff_filespec_size(two); | |
3285 | data->deleted = diff_filespec_size(one); | |
3286 | } | |
3287 | } | |
3288 | ||
3289 | else if (complete_rewrite) { | |
3290 | diff_populate_filespec(one, 0); | |
3291 | diff_populate_filespec(two, 0); | |
3292 | data->deleted = count_lines(one->data, one->size); | |
3293 | data->added = count_lines(two->data, two->size); | |
3294 | } | |
3295 | ||
3296 | else if (!same_contents) { | |
3297 | /* Crazy xdl interfaces.. */ | |
3298 | xpparam_t xpp; | |
3299 | xdemitconf_t xecfg; | |
3300 | ||
3301 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
3302 | die("unable to read files to diff"); | |
3303 | ||
3304 | memset(&xpp, 0, sizeof(xpp)); | |
3305 | memset(&xecfg, 0, sizeof(xecfg)); | |
3306 | xpp.flags = o->xdl_opts; | |
3307 | xpp.anchors = o->anchors; | |
3308 | xpp.anchors_nr = o->anchors_nr; | |
3309 | xecfg.ctxlen = o->context; | |
3310 | xecfg.interhunkctxlen = o->interhunkcontext; | |
3311 | if (xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, | |
3312 | &xpp, &xecfg)) | |
3313 | die("unable to generate diffstat for %s", one->path); | |
3314 | } | |
3315 | ||
3316 | diff_free_filespec_data(one); | |
3317 | diff_free_filespec_data(two); | |
3318 | } | |
3319 | ||
3320 | static void builtin_checkdiff(const char *name_a, const char *name_b, | |
3321 | const char *attr_path, | |
3322 | struct diff_filespec *one, | |
3323 | struct diff_filespec *two, | |
3324 | struct diff_options *o) | |
3325 | { | |
3326 | mmfile_t mf1, mf2; | |
3327 | struct checkdiff_t data; | |
3328 | ||
3329 | if (!two) | |
3330 | return; | |
3331 | ||
3332 | memset(&data, 0, sizeof(data)); | |
3333 | data.filename = name_b ? name_b : name_a; | |
3334 | data.lineno = 0; | |
3335 | data.o = o; | |
3336 | data.ws_rule = whitespace_rule(attr_path); | |
3337 | data.conflict_marker_size = ll_merge_marker_size(attr_path); | |
3338 | ||
3339 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
3340 | die("unable to read files to diff"); | |
3341 | ||
3342 | /* | |
3343 | * All the other codepaths check both sides, but not checking | |
3344 | * the "old" side here is deliberate. We are checking the newly | |
3345 | * introduced changes, and as long as the "new" side is text, we | |
3346 | * can and should check what it introduces. | |
3347 | */ | |
3348 | if (diff_filespec_is_binary(two)) | |
3349 | goto free_and_return; | |
3350 | else { | |
3351 | /* Crazy xdl interfaces.. */ | |
3352 | xpparam_t xpp; | |
3353 | xdemitconf_t xecfg; | |
3354 | ||
3355 | memset(&xpp, 0, sizeof(xpp)); | |
3356 | memset(&xecfg, 0, sizeof(xecfg)); | |
3357 | xecfg.ctxlen = 1; /* at least one context line */ | |
3358 | xpp.flags = 0; | |
3359 | if (xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, | |
3360 | &xpp, &xecfg)) | |
3361 | die("unable to generate checkdiff for %s", one->path); | |
3362 | ||
3363 | if (data.ws_rule & WS_BLANK_AT_EOF) { | |
3364 | struct emit_callback ecbdata; | |
3365 | int blank_at_eof; | |
3366 | ||
3367 | ecbdata.ws_rule = data.ws_rule; | |
3368 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
3369 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; | |
3370 | ||
3371 | if (blank_at_eof) { | |
3372 | static char *err; | |
3373 | if (!err) | |
3374 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
3375 | fprintf(o->file, "%s:%d: %s.\n", | |
3376 | data.filename, blank_at_eof, err); | |
3377 | data.status = 1; /* report errors */ | |
3378 | } | |
3379 | } | |
3380 | } | |
3381 | free_and_return: | |
3382 | diff_free_filespec_data(one); | |
3383 | diff_free_filespec_data(two); | |
3384 | if (data.status) | |
3385 | o->flags.check_failed = 1; | |
3386 | } | |
3387 | ||
3388 | struct diff_filespec *alloc_filespec(const char *path) | |
3389 | { | |
3390 | struct diff_filespec *spec; | |
3391 | ||
3392 | FLEXPTR_ALLOC_STR(spec, path, path); | |
3393 | spec->count = 1; | |
3394 | spec->is_binary = -1; | |
3395 | return spec; | |
3396 | } | |
3397 | ||
3398 | void free_filespec(struct diff_filespec *spec) | |
3399 | { | |
3400 | if (!--spec->count) { | |
3401 | diff_free_filespec_data(spec); | |
3402 | free(spec); | |
3403 | } | |
3404 | } | |
3405 | ||
3406 | void fill_filespec(struct diff_filespec *spec, const struct object_id *oid, | |
3407 | int oid_valid, unsigned short mode) | |
3408 | { | |
3409 | if (mode) { | |
3410 | spec->mode = canon_mode(mode); | |
3411 | oidcpy(&spec->oid, oid); | |
3412 | spec->oid_valid = oid_valid; | |
3413 | } | |
3414 | } | |
3415 | ||
3416 | /* | |
3417 | * Given a name and sha1 pair, if the index tells us the file in | |
3418 | * the work tree has that object contents, return true, so that | |
3419 | * prepare_temp_file() does not have to inflate and extract. | |
3420 | */ | |
3421 | static int reuse_worktree_file(const char *name, const struct object_id *oid, int want_file) | |
3422 | { | |
3423 | const struct cache_entry *ce; | |
3424 | struct stat st; | |
3425 | int pos, len; | |
3426 | ||
3427 | /* | |
3428 | * We do not read the cache ourselves here, because the | |
3429 | * benchmark with my previous version that always reads cache | |
3430 | * shows that it makes things worse for diff-tree comparing | |
3431 | * two linux-2.6 kernel trees in an already checked out work | |
3432 | * tree. This is because most diff-tree comparisons deal with | |
3433 | * only a small number of files, while reading the cache is | |
3434 | * expensive for a large project, and its cost outweighs the | |
3435 | * savings we get by not inflating the object to a temporary | |
3436 | * file. Practically, this code only helps when we are used | |
3437 | * by diff-cache --cached, which does read the cache before | |
3438 | * calling us. | |
3439 | */ | |
3440 | if (!active_cache) | |
3441 | return 0; | |
3442 | ||
3443 | /* We want to avoid the working directory if our caller | |
3444 | * doesn't need the data in a normal file, this system | |
3445 | * is rather slow with its stat/open/mmap/close syscalls, | |
3446 | * and the object is contained in a pack file. The pack | |
3447 | * is probably already open and will be faster to obtain | |
3448 | * the data through than the working directory. Loose | |
3449 | * objects however would tend to be slower as they need | |
3450 | * to be individually opened and inflated. | |
3451 | */ | |
3452 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(oid->hash)) | |
3453 | return 0; | |
3454 | ||
3455 | /* | |
3456 | * Similarly, if we'd have to convert the file contents anyway, that | |
3457 | * makes the optimization not worthwhile. | |
3458 | */ | |
3459 | if (!want_file && would_convert_to_git(&the_index, name)) | |
3460 | return 0; | |
3461 | ||
3462 | len = strlen(name); | |
3463 | pos = cache_name_pos(name, len); | |
3464 | if (pos < 0) | |
3465 | return 0; | |
3466 | ce = active_cache[pos]; | |
3467 | ||
3468 | /* | |
3469 | * This is not the sha1 we are looking for, or | |
3470 | * unreusable because it is not a regular file. | |
3471 | */ | |
3472 | if (oidcmp(oid, &ce->oid) || !S_ISREG(ce->ce_mode)) | |
3473 | return 0; | |
3474 | ||
3475 | /* | |
3476 | * If ce is marked as "assume unchanged", there is no | |
3477 | * guarantee that work tree matches what we are looking for. | |
3478 | */ | |
3479 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) | |
3480 | return 0; | |
3481 | ||
3482 | /* | |
3483 | * If ce matches the file in the work tree, we can reuse it. | |
3484 | */ | |
3485 | if (ce_uptodate(ce) || | |
3486 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
3487 | return 1; | |
3488 | ||
3489 | return 0; | |
3490 | } | |
3491 | ||
3492 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) | |
3493 | { | |
3494 | struct strbuf buf = STRBUF_INIT; | |
3495 | char *dirty = ""; | |
3496 | ||
3497 | /* Are we looking at the work tree? */ | |
3498 | if (s->dirty_submodule) | |
3499 | dirty = "-dirty"; | |
3500 | ||
3501 | strbuf_addf(&buf, "Subproject commit %s%s\n", | |
3502 | oid_to_hex(&s->oid), dirty); | |
3503 | s->size = buf.len; | |
3504 | if (size_only) { | |
3505 | s->data = NULL; | |
3506 | strbuf_release(&buf); | |
3507 | } else { | |
3508 | s->data = strbuf_detach(&buf, NULL); | |
3509 | s->should_free = 1; | |
3510 | } | |
3511 | return 0; | |
3512 | } | |
3513 | ||
3514 | /* | |
3515 | * While doing rename detection and pickaxe operation, we may need to | |
3516 | * grab the data for the blob (or file) for our own in-core comparison. | |
3517 | * diff_filespec has data and size fields for this purpose. | |
3518 | */ | |
3519 | int diff_populate_filespec(struct diff_filespec *s, unsigned int flags) | |
3520 | { | |
3521 | int size_only = flags & CHECK_SIZE_ONLY; | |
3522 | int err = 0; | |
3523 | int conv_flags = global_conv_flags_eol; | |
3524 | /* | |
3525 | * demote FAIL to WARN to allow inspecting the situation | |
3526 | * instead of refusing. | |
3527 | */ | |
3528 | if (conv_flags & CONV_EOL_RNDTRP_DIE) | |
3529 | conv_flags = CONV_EOL_RNDTRP_WARN; | |
3530 | ||
3531 | if (!DIFF_FILE_VALID(s)) | |
3532 | die("internal error: asking to populate invalid file."); | |
3533 | if (S_ISDIR(s->mode)) | |
3534 | return -1; | |
3535 | ||
3536 | if (s->data) | |
3537 | return 0; | |
3538 | ||
3539 | if (size_only && 0 < s->size) | |
3540 | return 0; | |
3541 | ||
3542 | if (S_ISGITLINK(s->mode)) | |
3543 | return diff_populate_gitlink(s, size_only); | |
3544 | ||
3545 | if (!s->oid_valid || | |
3546 | reuse_worktree_file(s->path, &s->oid, 0)) { | |
3547 | struct strbuf buf = STRBUF_INIT; | |
3548 | struct stat st; | |
3549 | int fd; | |
3550 | ||
3551 | if (lstat(s->path, &st) < 0) { | |
3552 | err_empty: | |
3553 | err = -1; | |
3554 | empty: | |
3555 | s->data = (char *)""; | |
3556 | s->size = 0; | |
3557 | return err; | |
3558 | } | |
3559 | s->size = xsize_t(st.st_size); | |
3560 | if (!s->size) | |
3561 | goto empty; | |
3562 | if (S_ISLNK(st.st_mode)) { | |
3563 | struct strbuf sb = STRBUF_INIT; | |
3564 | ||
3565 | if (strbuf_readlink(&sb, s->path, s->size)) | |
3566 | goto err_empty; | |
3567 | s->size = sb.len; | |
3568 | s->data = strbuf_detach(&sb, NULL); | |
3569 | s->should_free = 1; | |
3570 | return 0; | |
3571 | } | |
3572 | ||
3573 | /* | |
3574 | * Even if the caller would be happy with getting | |
3575 | * only the size, we cannot return early at this | |
3576 | * point if the path requires us to run the content | |
3577 | * conversion. | |
3578 | */ | |
3579 | if (size_only && !would_convert_to_git(&the_index, s->path)) | |
3580 | return 0; | |
3581 | ||
3582 | /* | |
3583 | * Note: this check uses xsize_t(st.st_size) that may | |
3584 | * not be the true size of the blob after it goes | |
3585 | * through convert_to_git(). This may not strictly be | |
3586 | * correct, but the whole point of big_file_threshold | |
3587 | * and is_binary check being that we want to avoid | |
3588 | * opening the file and inspecting the contents, this | |
3589 | * is probably fine. | |
3590 | */ | |
3591 | if ((flags & CHECK_BINARY) && | |
3592 | s->size > big_file_threshold && s->is_binary == -1) { | |
3593 | s->is_binary = 1; | |
3594 | return 0; | |
3595 | } | |
3596 | fd = open(s->path, O_RDONLY); | |
3597 | if (fd < 0) | |
3598 | goto err_empty; | |
3599 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); | |
3600 | close(fd); | |
3601 | s->should_munmap = 1; | |
3602 | ||
3603 | /* | |
3604 | * Convert from working tree format to canonical git format | |
3605 | */ | |
3606 | if (convert_to_git(&the_index, s->path, s->data, s->size, &buf, conv_flags)) { | |
3607 | size_t size = 0; | |
3608 | munmap(s->data, s->size); | |
3609 | s->should_munmap = 0; | |
3610 | s->data = strbuf_detach(&buf, &size); | |
3611 | s->size = size; | |
3612 | s->should_free = 1; | |
3613 | } | |
3614 | } | |
3615 | else { | |
3616 | enum object_type type; | |
3617 | if (size_only || (flags & CHECK_BINARY)) { | |
3618 | type = sha1_object_info(s->oid.hash, &s->size); | |
3619 | if (type < 0) | |
3620 | die("unable to read %s", | |
3621 | oid_to_hex(&s->oid)); | |
3622 | if (size_only) | |
3623 | return 0; | |
3624 | if (s->size > big_file_threshold && s->is_binary == -1) { | |
3625 | s->is_binary = 1; | |
3626 | return 0; | |
3627 | } | |
3628 | } | |
3629 | s->data = read_sha1_file(s->oid.hash, &type, &s->size); | |
3630 | if (!s->data) | |
3631 | die("unable to read %s", oid_to_hex(&s->oid)); | |
3632 | s->should_free = 1; | |
3633 | } | |
3634 | return 0; | |
3635 | } | |
3636 | ||
3637 | void diff_free_filespec_blob(struct diff_filespec *s) | |
3638 | { | |
3639 | if (s->should_free) | |
3640 | free(s->data); | |
3641 | else if (s->should_munmap) | |
3642 | munmap(s->data, s->size); | |
3643 | ||
3644 | if (s->should_free || s->should_munmap) { | |
3645 | s->should_free = s->should_munmap = 0; | |
3646 | s->data = NULL; | |
3647 | } | |
3648 | } | |
3649 | ||
3650 | void diff_free_filespec_data(struct diff_filespec *s) | |
3651 | { | |
3652 | diff_free_filespec_blob(s); | |
3653 | FREE_AND_NULL(s->cnt_data); | |
3654 | } | |
3655 | ||
3656 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, | |
3657 | void *blob, | |
3658 | unsigned long size, | |
3659 | const struct object_id *oid, | |
3660 | int mode) | |
3661 | { | |
3662 | struct strbuf buf = STRBUF_INIT; | |
3663 | struct strbuf tempfile = STRBUF_INIT; | |
3664 | char *path_dup = xstrdup(path); | |
3665 | const char *base = basename(path_dup); | |
3666 | ||
3667 | /* Generate "XXXXXX_basename.ext" */ | |
3668 | strbuf_addstr(&tempfile, "XXXXXX_"); | |
3669 | strbuf_addstr(&tempfile, base); | |
3670 | ||
3671 | temp->tempfile = mks_tempfile_ts(tempfile.buf, strlen(base) + 1); | |
3672 | if (!temp->tempfile) | |
3673 | die_errno("unable to create temp-file"); | |
3674 | if (convert_to_working_tree(path, | |
3675 | (const char *)blob, (size_t)size, &buf)) { | |
3676 | blob = buf.buf; | |
3677 | size = buf.len; | |
3678 | } | |
3679 | if (write_in_full(temp->tempfile->fd, blob, size) < 0 || | |
3680 | close_tempfile_gently(temp->tempfile)) | |
3681 | die_errno("unable to write temp-file"); | |
3682 | temp->name = get_tempfile_path(temp->tempfile); | |
3683 | oid_to_hex_r(temp->hex, oid); | |
3684 | xsnprintf(temp->mode, sizeof(temp->mode), "%06o", mode); | |
3685 | strbuf_release(&buf); | |
3686 | strbuf_release(&tempfile); | |
3687 | free(path_dup); | |
3688 | } | |
3689 | ||
3690 | static struct diff_tempfile *prepare_temp_file(const char *name, | |
3691 | struct diff_filespec *one) | |
3692 | { | |
3693 | struct diff_tempfile *temp = claim_diff_tempfile(); | |
3694 | ||
3695 | if (!DIFF_FILE_VALID(one)) { | |
3696 | not_a_valid_file: | |
3697 | /* A '-' entry produces this for file-2, and | |
3698 | * a '+' entry produces this for file-1. | |
3699 | */ | |
3700 | temp->name = "/dev/null"; | |
3701 | xsnprintf(temp->hex, sizeof(temp->hex), "."); | |
3702 | xsnprintf(temp->mode, sizeof(temp->mode), "."); | |
3703 | return temp; | |
3704 | } | |
3705 | ||
3706 | if (!S_ISGITLINK(one->mode) && | |
3707 | (!one->oid_valid || | |
3708 | reuse_worktree_file(name, &one->oid, 1))) { | |
3709 | struct stat st; | |
3710 | if (lstat(name, &st) < 0) { | |
3711 | if (errno == ENOENT) | |
3712 | goto not_a_valid_file; | |
3713 | die_errno("stat(%s)", name); | |
3714 | } | |
3715 | if (S_ISLNK(st.st_mode)) { | |
3716 | struct strbuf sb = STRBUF_INIT; | |
3717 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
3718 | die_errno("readlink(%s)", name); | |
3719 | prep_temp_blob(name, temp, sb.buf, sb.len, | |
3720 | (one->oid_valid ? | |
3721 | &one->oid : &null_oid), | |
3722 | (one->oid_valid ? | |
3723 | one->mode : S_IFLNK)); | |
3724 | strbuf_release(&sb); | |
3725 | } | |
3726 | else { | |
3727 | /* we can borrow from the file in the work tree */ | |
3728 | temp->name = name; | |
3729 | if (!one->oid_valid) | |
3730 | oid_to_hex_r(temp->hex, &null_oid); | |
3731 | else | |
3732 | oid_to_hex_r(temp->hex, &one->oid); | |
3733 | /* Even though we may sometimes borrow the | |
3734 | * contents from the work tree, we always want | |
3735 | * one->mode. mode is trustworthy even when | |
3736 | * !(one->oid_valid), as long as | |
3737 | * DIFF_FILE_VALID(one). | |
3738 | */ | |
3739 | xsnprintf(temp->mode, sizeof(temp->mode), "%06o", one->mode); | |
3740 | } | |
3741 | return temp; | |
3742 | } | |
3743 | else { | |
3744 | if (diff_populate_filespec(one, 0)) | |
3745 | die("cannot read data blob for %s", one->path); | |
3746 | prep_temp_blob(name, temp, one->data, one->size, | |
3747 | &one->oid, one->mode); | |
3748 | } | |
3749 | return temp; | |
3750 | } | |
3751 | ||
3752 | static void add_external_diff_name(struct argv_array *argv, | |
3753 | const char *name, | |
3754 | struct diff_filespec *df) | |
3755 | { | |
3756 | struct diff_tempfile *temp = prepare_temp_file(name, df); | |
3757 | argv_array_push(argv, temp->name); | |
3758 | argv_array_push(argv, temp->hex); | |
3759 | argv_array_push(argv, temp->mode); | |
3760 | } | |
3761 | ||
3762 | /* An external diff command takes: | |
3763 | * | |
3764 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
3765 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
3766 | * | |
3767 | */ | |
3768 | static void run_external_diff(const char *pgm, | |
3769 | const char *name, | |
3770 | const char *other, | |
3771 | struct diff_filespec *one, | |
3772 | struct diff_filespec *two, | |
3773 | const char *xfrm_msg, | |
3774 | int complete_rewrite, | |
3775 | struct diff_options *o) | |
3776 | { | |
3777 | struct argv_array argv = ARGV_ARRAY_INIT; | |
3778 | struct argv_array env = ARGV_ARRAY_INIT; | |
3779 | struct diff_queue_struct *q = &diff_queued_diff; | |
3780 | ||
3781 | argv_array_push(&argv, pgm); | |
3782 | argv_array_push(&argv, name); | |
3783 | ||
3784 | if (one && two) { | |
3785 | add_external_diff_name(&argv, name, one); | |
3786 | if (!other) | |
3787 | add_external_diff_name(&argv, name, two); | |
3788 | else { | |
3789 | add_external_diff_name(&argv, other, two); | |
3790 | argv_array_push(&argv, other); | |
3791 | argv_array_push(&argv, xfrm_msg); | |
3792 | } | |
3793 | } | |
3794 | ||
3795 | argv_array_pushf(&env, "GIT_DIFF_PATH_COUNTER=%d", ++o->diff_path_counter); | |
3796 | argv_array_pushf(&env, "GIT_DIFF_PATH_TOTAL=%d", q->nr); | |
3797 | ||
3798 | if (run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env.argv)) | |
3799 | die(_("external diff died, stopping at %s"), name); | |
3800 | ||
3801 | remove_tempfile(); | |
3802 | argv_array_clear(&argv); | |
3803 | argv_array_clear(&env); | |
3804 | } | |
3805 | ||
3806 | static int similarity_index(struct diff_filepair *p) | |
3807 | { | |
3808 | return p->score * 100 / MAX_SCORE; | |
3809 | } | |
3810 | ||
3811 | static const char *diff_abbrev_oid(const struct object_id *oid, int abbrev) | |
3812 | { | |
3813 | if (startup_info->have_repository) | |
3814 | return find_unique_abbrev(oid->hash, abbrev); | |
3815 | else { | |
3816 | char *hex = oid_to_hex(oid); | |
3817 | if (abbrev < 0) | |
3818 | abbrev = FALLBACK_DEFAULT_ABBREV; | |
3819 | if (abbrev > GIT_SHA1_HEXSZ) | |
3820 | die("BUG: oid abbreviation out of range: %d", abbrev); | |
3821 | if (abbrev) | |
3822 | hex[abbrev] = '\0'; | |
3823 | return hex; | |
3824 | } | |
3825 | } | |
3826 | ||
3827 | static void fill_metainfo(struct strbuf *msg, | |
3828 | const char *name, | |
3829 | const char *other, | |
3830 | struct diff_filespec *one, | |
3831 | struct diff_filespec *two, | |
3832 | struct diff_options *o, | |
3833 | struct diff_filepair *p, | |
3834 | int *must_show_header, | |
3835 | int use_color) | |
3836 | { | |
3837 | const char *set = diff_get_color(use_color, DIFF_METAINFO); | |
3838 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
3839 | const char *line_prefix = diff_line_prefix(o); | |
3840 | ||
3841 | *must_show_header = 1; | |
3842 | strbuf_init(msg, PATH_MAX * 2 + 300); | |
3843 | switch (p->status) { | |
3844 | case DIFF_STATUS_COPIED: | |
3845 | strbuf_addf(msg, "%s%ssimilarity index %d%%", | |
3846 | line_prefix, set, similarity_index(p)); | |
3847 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
3848 | reset, line_prefix, set); | |
3849 | quote_c_style(name, msg, NULL, 0); | |
3850 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); | |
3851 | quote_c_style(other, msg, NULL, 0); | |
3852 | strbuf_addf(msg, "%s\n", reset); | |
3853 | break; | |
3854 | case DIFF_STATUS_RENAMED: | |
3855 | strbuf_addf(msg, "%s%ssimilarity index %d%%", | |
3856 | line_prefix, set, similarity_index(p)); | |
3857 | strbuf_addf(msg, "%s\n%s%srename from ", | |
3858 | reset, line_prefix, set); | |
3859 | quote_c_style(name, msg, NULL, 0); | |
3860 | strbuf_addf(msg, "%s\n%s%srename to ", | |
3861 | reset, line_prefix, set); | |
3862 | quote_c_style(other, msg, NULL, 0); | |
3863 | strbuf_addf(msg, "%s\n", reset); | |
3864 | break; | |
3865 | case DIFF_STATUS_MODIFIED: | |
3866 | if (p->score) { | |
3867 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", | |
3868 | line_prefix, | |
3869 | set, similarity_index(p), reset); | |
3870 | break; | |
3871 | } | |
3872 | /* fallthru */ | |
3873 | default: | |
3874 | *must_show_header = 0; | |
3875 | } | |
3876 | if (one && two && oidcmp(&one->oid, &two->oid)) { | |
3877 | int abbrev = o->flags.full_index ? 40 : DEFAULT_ABBREV; | |
3878 | ||
3879 | if (o->flags.binary) { | |
3880 | mmfile_t mf; | |
3881 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
3882 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
3883 | abbrev = 40; | |
3884 | } | |
3885 | strbuf_addf(msg, "%s%sindex %s..%s", line_prefix, set, | |
3886 | diff_abbrev_oid(&one->oid, abbrev), | |
3887 | diff_abbrev_oid(&two->oid, abbrev)); | |
3888 | if (one->mode == two->mode) | |
3889 | strbuf_addf(msg, " %06o", one->mode); | |
3890 | strbuf_addf(msg, "%s\n", reset); | |
3891 | } | |
3892 | } | |
3893 | ||
3894 | static void run_diff_cmd(const char *pgm, | |
3895 | const char *name, | |
3896 | const char *other, | |
3897 | const char *attr_path, | |
3898 | struct diff_filespec *one, | |
3899 | struct diff_filespec *two, | |
3900 | struct strbuf *msg, | |
3901 | struct diff_options *o, | |
3902 | struct diff_filepair *p) | |
3903 | { | |
3904 | const char *xfrm_msg = NULL; | |
3905 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
3906 | int must_show_header = 0; | |
3907 | ||
3908 | ||
3909 | if (o->flags.allow_external) { | |
3910 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); | |
3911 | if (drv && drv->external) | |
3912 | pgm = drv->external; | |
3913 | } | |
3914 | ||
3915 | if (msg) { | |
3916 | /* | |
3917 | * don't use colors when the header is intended for an | |
3918 | * external diff driver | |
3919 | */ | |
3920 | fill_metainfo(msg, name, other, one, two, o, p, | |
3921 | &must_show_header, | |
3922 | want_color(o->use_color) && !pgm); | |
3923 | xfrm_msg = msg->len ? msg->buf : NULL; | |
3924 | } | |
3925 | ||
3926 | if (pgm) { | |
3927 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
3928 | complete_rewrite, o); | |
3929 | return; | |
3930 | } | |
3931 | if (one && two) | |
3932 | builtin_diff(name, other ? other : name, | |
3933 | one, two, xfrm_msg, must_show_header, | |
3934 | o, complete_rewrite); | |
3935 | else | |
3936 | fprintf(o->file, "* Unmerged path %s\n", name); | |
3937 | } | |
3938 | ||
3939 | static void diff_fill_oid_info(struct diff_filespec *one) | |
3940 | { | |
3941 | if (DIFF_FILE_VALID(one)) { | |
3942 | if (!one->oid_valid) { | |
3943 | struct stat st; | |
3944 | if (one->is_stdin) { | |
3945 | oidclr(&one->oid); | |
3946 | return; | |
3947 | } | |
3948 | if (lstat(one->path, &st) < 0) | |
3949 | die_errno("stat '%s'", one->path); | |
3950 | if (index_path(&one->oid, one->path, &st, 0)) | |
3951 | die("cannot hash %s", one->path); | |
3952 | } | |
3953 | } | |
3954 | else | |
3955 | oidclr(&one->oid); | |
3956 | } | |
3957 | ||
3958 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) | |
3959 | { | |
3960 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
3961 | if (*namep && **namep != '/') { | |
3962 | *namep += prefix_length; | |
3963 | if (**namep == '/') | |
3964 | ++*namep; | |
3965 | } | |
3966 | if (*otherp && **otherp != '/') { | |
3967 | *otherp += prefix_length; | |
3968 | if (**otherp == '/') | |
3969 | ++*otherp; | |
3970 | } | |
3971 | } | |
3972 | ||
3973 | static void run_diff(struct diff_filepair *p, struct diff_options *o) | |
3974 | { | |
3975 | const char *pgm = external_diff(); | |
3976 | struct strbuf msg; | |
3977 | struct diff_filespec *one = p->one; | |
3978 | struct diff_filespec *two = p->two; | |
3979 | const char *name; | |
3980 | const char *other; | |
3981 | const char *attr_path; | |
3982 | ||
3983 | name = one->path; | |
3984 | other = (strcmp(name, two->path) ? two->path : NULL); | |
3985 | attr_path = name; | |
3986 | if (o->prefix_length) | |
3987 | strip_prefix(o->prefix_length, &name, &other); | |
3988 | ||
3989 | if (!o->flags.allow_external) | |
3990 | pgm = NULL; | |
3991 | ||
3992 | if (DIFF_PAIR_UNMERGED(p)) { | |
3993 | run_diff_cmd(pgm, name, NULL, attr_path, | |
3994 | NULL, NULL, NULL, o, p); | |
3995 | return; | |
3996 | } | |
3997 | ||
3998 | diff_fill_oid_info(one); | |
3999 | diff_fill_oid_info(two); | |
4000 | ||
4001 | if (!pgm && | |
4002 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
4003 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
4004 | /* | |
4005 | * a filepair that changes between file and symlink | |
4006 | * needs to be split into deletion and creation. | |
4007 | */ | |
4008 | struct diff_filespec *null = alloc_filespec(two->path); | |
4009 | run_diff_cmd(NULL, name, other, attr_path, | |
4010 | one, null, &msg, o, p); | |
4011 | free(null); | |
4012 | strbuf_release(&msg); | |
4013 | ||
4014 | null = alloc_filespec(one->path); | |
4015 | run_diff_cmd(NULL, name, other, attr_path, | |
4016 | null, two, &msg, o, p); | |
4017 | free(null); | |
4018 | } | |
4019 | else | |
4020 | run_diff_cmd(pgm, name, other, attr_path, | |
4021 | one, two, &msg, o, p); | |
4022 | ||
4023 | strbuf_release(&msg); | |
4024 | } | |
4025 | ||
4026 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
4027 | struct diffstat_t *diffstat) | |
4028 | { | |
4029 | const char *name; | |
4030 | const char *other; | |
4031 | ||
4032 | if (DIFF_PAIR_UNMERGED(p)) { | |
4033 | /* unmerged */ | |
4034 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, p); | |
4035 | return; | |
4036 | } | |
4037 | ||
4038 | name = p->one->path; | |
4039 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
4040 | ||
4041 | if (o->prefix_length) | |
4042 | strip_prefix(o->prefix_length, &name, &other); | |
4043 | ||
4044 | diff_fill_oid_info(p->one); | |
4045 | diff_fill_oid_info(p->two); | |
4046 | ||
4047 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, p); | |
4048 | } | |
4049 | ||
4050 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) | |
4051 | { | |
4052 | const char *name; | |
4053 | const char *other; | |
4054 | const char *attr_path; | |
4055 | ||
4056 | if (DIFF_PAIR_UNMERGED(p)) { | |
4057 | /* unmerged */ | |
4058 | return; | |
4059 | } | |
4060 | ||
4061 | name = p->one->path; | |
4062 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
4063 | attr_path = other ? other : name; | |
4064 | ||
4065 | if (o->prefix_length) | |
4066 | strip_prefix(o->prefix_length, &name, &other); | |
4067 | ||
4068 | diff_fill_oid_info(p->one); | |
4069 | diff_fill_oid_info(p->two); | |
4070 | ||
4071 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); | |
4072 | } | |
4073 | ||
4074 | void diff_setup(struct diff_options *options) | |
4075 | { | |
4076 | memcpy(options, &default_diff_options, sizeof(*options)); | |
4077 | ||
4078 | options->file = stdout; | |
4079 | ||
4080 | options->abbrev = DEFAULT_ABBREV; | |
4081 | options->line_termination = '\n'; | |
4082 | options->break_opt = -1; | |
4083 | options->rename_limit = -1; | |
4084 | options->dirstat_permille = diff_dirstat_permille_default; | |
4085 | options->context = diff_context_default; | |
4086 | options->interhunkcontext = diff_interhunk_context_default; | |
4087 | options->ws_error_highlight = ws_error_highlight_default; | |
4088 | options->flags.rename_empty = 1; | |
4089 | options->objfind = NULL; | |
4090 | ||
4091 | /* pathchange left =NULL by default */ | |
4092 | options->change = diff_change; | |
4093 | options->add_remove = diff_addremove; | |
4094 | options->use_color = diff_use_color_default; | |
4095 | options->detect_rename = diff_detect_rename_default; | |
4096 | options->xdl_opts |= diff_algorithm; | |
4097 | if (diff_indent_heuristic) | |
4098 | DIFF_XDL_SET(options, INDENT_HEURISTIC); | |
4099 | ||
4100 | options->orderfile = diff_order_file_cfg; | |
4101 | ||
4102 | if (diff_no_prefix) { | |
4103 | options->a_prefix = options->b_prefix = ""; | |
4104 | } else if (!diff_mnemonic_prefix) { | |
4105 | options->a_prefix = "a/"; | |
4106 | options->b_prefix = "b/"; | |
4107 | } | |
4108 | ||
4109 | options->color_moved = diff_color_moved_default; | |
4110 | } | |
4111 | ||
4112 | void diff_setup_done(struct diff_options *options) | |
4113 | { | |
4114 | unsigned check_mask = DIFF_FORMAT_NAME | | |
4115 | DIFF_FORMAT_NAME_STATUS | | |
4116 | DIFF_FORMAT_CHECKDIFF | | |
4117 | DIFF_FORMAT_NO_OUTPUT; | |
4118 | ||
4119 | if (options->set_default) | |
4120 | options->set_default(options); | |
4121 | ||
4122 | if (HAS_MULTI_BITS(options->output_format & check_mask)) | |
4123 | die(_("--name-only, --name-status, --check and -s are mutually exclusive")); | |
4124 | ||
4125 | if (HAS_MULTI_BITS(options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK)) | |
4126 | die(_("-G, -S and --find-object are mutually exclusive")); | |
4127 | ||
4128 | /* | |
4129 | * Most of the time we can say "there are changes" | |
4130 | * only by checking if there are changed paths, but | |
4131 | * --ignore-whitespace* options force us to look | |
4132 | * inside contents. | |
4133 | */ | |
4134 | ||
4135 | if ((options->xdl_opts & XDF_WHITESPACE_FLAGS)) | |
4136 | options->flags.diff_from_contents = 1; | |
4137 | else | |
4138 | options->flags.diff_from_contents = 0; | |
4139 | ||
4140 | if (options->flags.find_copies_harder) | |
4141 | options->detect_rename = DIFF_DETECT_COPY; | |
4142 | ||
4143 | if (!options->flags.relative_name) | |
4144 | options->prefix = NULL; | |
4145 | if (options->prefix) | |
4146 | options->prefix_length = strlen(options->prefix); | |
4147 | else | |
4148 | options->prefix_length = 0; | |
4149 | ||
4150 | if (options->output_format & (DIFF_FORMAT_NAME | | |
4151 | DIFF_FORMAT_NAME_STATUS | | |
4152 | DIFF_FORMAT_CHECKDIFF | | |
4153 | DIFF_FORMAT_NO_OUTPUT)) | |
4154 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
4155 | DIFF_FORMAT_NUMSTAT | | |
4156 | DIFF_FORMAT_DIFFSTAT | | |
4157 | DIFF_FORMAT_SHORTSTAT | | |
4158 | DIFF_FORMAT_DIRSTAT | | |
4159 | DIFF_FORMAT_SUMMARY | | |
4160 | DIFF_FORMAT_PATCH); | |
4161 | ||
4162 | /* | |
4163 | * These cases always need recursive; we do not drop caller-supplied | |
4164 | * recursive bits for other formats here. | |
4165 | */ | |
4166 | if (options->output_format & (DIFF_FORMAT_PATCH | | |
4167 | DIFF_FORMAT_NUMSTAT | | |
4168 | DIFF_FORMAT_DIFFSTAT | | |
4169 | DIFF_FORMAT_SHORTSTAT | | |
4170 | DIFF_FORMAT_DIRSTAT | | |
4171 | DIFF_FORMAT_SUMMARY | | |
4172 | DIFF_FORMAT_CHECKDIFF)) | |
4173 | options->flags.recursive = 1; | |
4174 | /* | |
4175 | * Also pickaxe would not work very well if you do not say recursive | |
4176 | */ | |
4177 | if (options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK) | |
4178 | options->flags.recursive = 1; | |
4179 | /* | |
4180 | * When patches are generated, submodules diffed against the work tree | |
4181 | * must be checked for dirtiness too so it can be shown in the output | |
4182 | */ | |
4183 | if (options->output_format & DIFF_FORMAT_PATCH) | |
4184 | options->flags.dirty_submodules = 1; | |
4185 | ||
4186 | if (options->detect_rename && options->rename_limit < 0) | |
4187 | options->rename_limit = diff_rename_limit_default; | |
4188 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
4189 | if (!active_cache) | |
4190 | /* read-cache does not die even when it fails | |
4191 | * so it is safe for us to do this here. Also | |
4192 | * it does not smudge active_cache or active_nr | |
4193 | * when it fails, so we do not have to worry about | |
4194 | * cleaning it up ourselves either. | |
4195 | */ | |
4196 | read_cache(); | |
4197 | } | |
4198 | if (40 < options->abbrev) | |
4199 | options->abbrev = 40; /* full */ | |
4200 | ||
4201 | /* | |
4202 | * It does not make sense to show the first hit we happened | |
4203 | * to have found. It does not make sense not to return with | |
4204 | * exit code in such a case either. | |
4205 | */ | |
4206 | if (options->flags.quick) { | |
4207 | options->output_format = DIFF_FORMAT_NO_OUTPUT; | |
4208 | options->flags.exit_with_status = 1; | |
4209 | } | |
4210 | ||
4211 | options->diff_path_counter = 0; | |
4212 | ||
4213 | if (options->flags.follow_renames && options->pathspec.nr != 1) | |
4214 | die(_("--follow requires exactly one pathspec")); | |
4215 | ||
4216 | if (!options->use_color || external_diff()) | |
4217 | options->color_moved = 0; | |
4218 | } | |
4219 | ||
4220 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) | |
4221 | { | |
4222 | char c, *eq; | |
4223 | int len; | |
4224 | ||
4225 | if (*arg != '-') | |
4226 | return 0; | |
4227 | c = *++arg; | |
4228 | if (!c) | |
4229 | return 0; | |
4230 | if (c == arg_short) { | |
4231 | c = *++arg; | |
4232 | if (!c) | |
4233 | return 1; | |
4234 | if (val && isdigit(c)) { | |
4235 | char *end; | |
4236 | int n = strtoul(arg, &end, 10); | |
4237 | if (*end) | |
4238 | return 0; | |
4239 | *val = n; | |
4240 | return 1; | |
4241 | } | |
4242 | return 0; | |
4243 | } | |
4244 | if (c != '-') | |
4245 | return 0; | |
4246 | arg++; | |
4247 | eq = strchrnul(arg, '='); | |
4248 | len = eq - arg; | |
4249 | if (!len || strncmp(arg, arg_long, len)) | |
4250 | return 0; | |
4251 | if (*eq) { | |
4252 | int n; | |
4253 | char *end; | |
4254 | if (!isdigit(*++eq)) | |
4255 | return 0; | |
4256 | n = strtoul(eq, &end, 10); | |
4257 | if (*end) | |
4258 | return 0; | |
4259 | *val = n; | |
4260 | } | |
4261 | return 1; | |
4262 | } | |
4263 | ||
4264 | static int diff_scoreopt_parse(const char *opt); | |
4265 | ||
4266 | static inline int short_opt(char opt, const char **argv, | |
4267 | const char **optarg) | |
4268 | { | |
4269 | const char *arg = argv[0]; | |
4270 | if (arg[0] != '-' || arg[1] != opt) | |
4271 | return 0; | |
4272 | if (arg[2] != '\0') { | |
4273 | *optarg = arg + 2; | |
4274 | return 1; | |
4275 | } | |
4276 | if (!argv[1]) | |
4277 | die("Option '%c' requires a value", opt); | |
4278 | *optarg = argv[1]; | |
4279 | return 2; | |
4280 | } | |
4281 | ||
4282 | int parse_long_opt(const char *opt, const char **argv, | |
4283 | const char **optarg) | |
4284 | { | |
4285 | const char *arg = argv[0]; | |
4286 | if (!skip_prefix(arg, "--", &arg)) | |
4287 | return 0; | |
4288 | if (!skip_prefix(arg, opt, &arg)) | |
4289 | return 0; | |
4290 | if (*arg == '=') { /* stuck form: --option=value */ | |
4291 | *optarg = arg + 1; | |
4292 | return 1; | |
4293 | } | |
4294 | if (*arg != '\0') | |
4295 | return 0; | |
4296 | /* separate form: --option value */ | |
4297 | if (!argv[1]) | |
4298 | die("Option '--%s' requires a value", opt); | |
4299 | *optarg = argv[1]; | |
4300 | return 2; | |
4301 | } | |
4302 | ||
4303 | static int stat_opt(struct diff_options *options, const char **av) | |
4304 | { | |
4305 | const char *arg = av[0]; | |
4306 | char *end; | |
4307 | int width = options->stat_width; | |
4308 | int name_width = options->stat_name_width; | |
4309 | int graph_width = options->stat_graph_width; | |
4310 | int count = options->stat_count; | |
4311 | int argcount = 1; | |
4312 | ||
4313 | if (!skip_prefix(arg, "--stat", &arg)) | |
4314 | die("BUG: stat option does not begin with --stat: %s", arg); | |
4315 | end = (char *)arg; | |
4316 | ||
4317 | switch (*arg) { | |
4318 | case '-': | |
4319 | if (skip_prefix(arg, "-width", &arg)) { | |
4320 | if (*arg == '=') | |
4321 | width = strtoul(arg + 1, &end, 10); | |
4322 | else if (!*arg && !av[1]) | |
4323 | die_want_option("--stat-width"); | |
4324 | else if (!*arg) { | |
4325 | width = strtoul(av[1], &end, 10); | |
4326 | argcount = 2; | |
4327 | } | |
4328 | } else if (skip_prefix(arg, "-name-width", &arg)) { | |
4329 | if (*arg == '=') | |
4330 | name_width = strtoul(arg + 1, &end, 10); | |
4331 | else if (!*arg && !av[1]) | |
4332 | die_want_option("--stat-name-width"); | |
4333 | else if (!*arg) { | |
4334 | name_width = strtoul(av[1], &end, 10); | |
4335 | argcount = 2; | |
4336 | } | |
4337 | } else if (skip_prefix(arg, "-graph-width", &arg)) { | |
4338 | if (*arg == '=') | |
4339 | graph_width = strtoul(arg + 1, &end, 10); | |
4340 | else if (!*arg && !av[1]) | |
4341 | die_want_option("--stat-graph-width"); | |
4342 | else if (!*arg) { | |
4343 | graph_width = strtoul(av[1], &end, 10); | |
4344 | argcount = 2; | |
4345 | } | |
4346 | } else if (skip_prefix(arg, "-count", &arg)) { | |
4347 | if (*arg == '=') | |
4348 | count = strtoul(arg + 1, &end, 10); | |
4349 | else if (!*arg && !av[1]) | |
4350 | die_want_option("--stat-count"); | |
4351 | else if (!*arg) { | |
4352 | count = strtoul(av[1], &end, 10); | |
4353 | argcount = 2; | |
4354 | } | |
4355 | } | |
4356 | break; | |
4357 | case '=': | |
4358 | width = strtoul(arg+1, &end, 10); | |
4359 | if (*end == ',') | |
4360 | name_width = strtoul(end+1, &end, 10); | |
4361 | if (*end == ',') | |
4362 | count = strtoul(end+1, &end, 10); | |
4363 | } | |
4364 | ||
4365 | /* Important! This checks all the error cases! */ | |
4366 | if (*end) | |
4367 | return 0; | |
4368 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
4369 | options->stat_name_width = name_width; | |
4370 | options->stat_graph_width = graph_width; | |
4371 | options->stat_width = width; | |
4372 | options->stat_count = count; | |
4373 | return argcount; | |
4374 | } | |
4375 | ||
4376 | static int parse_dirstat_opt(struct diff_options *options, const char *params) | |
4377 | { | |
4378 | struct strbuf errmsg = STRBUF_INIT; | |
4379 | if (parse_dirstat_params(options, params, &errmsg)) | |
4380 | die(_("Failed to parse --dirstat/-X option parameter:\n%s"), | |
4381 | errmsg.buf); | |
4382 | strbuf_release(&errmsg); | |
4383 | /* | |
4384 | * The caller knows a dirstat-related option is given from the command | |
4385 | * line; allow it to say "return this_function();" | |
4386 | */ | |
4387 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
4388 | return 1; | |
4389 | } | |
4390 | ||
4391 | static int parse_submodule_opt(struct diff_options *options, const char *value) | |
4392 | { | |
4393 | if (parse_submodule_params(options, value)) | |
4394 | die(_("Failed to parse --submodule option parameter: '%s'"), | |
4395 | value); | |
4396 | return 1; | |
4397 | } | |
4398 | ||
4399 | static const char diff_status_letters[] = { | |
4400 | DIFF_STATUS_ADDED, | |
4401 | DIFF_STATUS_COPIED, | |
4402 | DIFF_STATUS_DELETED, | |
4403 | DIFF_STATUS_MODIFIED, | |
4404 | DIFF_STATUS_RENAMED, | |
4405 | DIFF_STATUS_TYPE_CHANGED, | |
4406 | DIFF_STATUS_UNKNOWN, | |
4407 | DIFF_STATUS_UNMERGED, | |
4408 | DIFF_STATUS_FILTER_AON, | |
4409 | DIFF_STATUS_FILTER_BROKEN, | |
4410 | '\0', | |
4411 | }; | |
4412 | ||
4413 | static unsigned int filter_bit['Z' + 1]; | |
4414 | ||
4415 | static void prepare_filter_bits(void) | |
4416 | { | |
4417 | int i; | |
4418 | ||
4419 | if (!filter_bit[DIFF_STATUS_ADDED]) { | |
4420 | for (i = 0; diff_status_letters[i]; i++) | |
4421 | filter_bit[(int) diff_status_letters[i]] = (1 << i); | |
4422 | } | |
4423 | } | |
4424 | ||
4425 | static unsigned filter_bit_tst(char status, const struct diff_options *opt) | |
4426 | { | |
4427 | return opt->filter & filter_bit[(int) status]; | |
4428 | } | |
4429 | ||
4430 | static int parse_diff_filter_opt(const char *optarg, struct diff_options *opt) | |
4431 | { | |
4432 | int i, optch; | |
4433 | ||
4434 | prepare_filter_bits(); | |
4435 | ||
4436 | /* | |
4437 | * If there is a negation e.g. 'd' in the input, and we haven't | |
4438 | * initialized the filter field with another --diff-filter, start | |
4439 | * from full set of bits, except for AON. | |
4440 | */ | |
4441 | if (!opt->filter) { | |
4442 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { | |
4443 | if (optch < 'a' || 'z' < optch) | |
4444 | continue; | |
4445 | opt->filter = (1 << (ARRAY_SIZE(diff_status_letters) - 1)) - 1; | |
4446 | opt->filter &= ~filter_bit[DIFF_STATUS_FILTER_AON]; | |
4447 | break; | |
4448 | } | |
4449 | } | |
4450 | ||
4451 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { | |
4452 | unsigned int bit; | |
4453 | int negate; | |
4454 | ||
4455 | if ('a' <= optch && optch <= 'z') { | |
4456 | negate = 1; | |
4457 | optch = toupper(optch); | |
4458 | } else { | |
4459 | negate = 0; | |
4460 | } | |
4461 | ||
4462 | bit = (0 <= optch && optch <= 'Z') ? filter_bit[optch] : 0; | |
4463 | if (!bit) | |
4464 | return optarg[i]; | |
4465 | if (negate) | |
4466 | opt->filter &= ~bit; | |
4467 | else | |
4468 | opt->filter |= bit; | |
4469 | } | |
4470 | return 0; | |
4471 | } | |
4472 | ||
4473 | static void enable_patch_output(int *fmt) { | |
4474 | *fmt &= ~DIFF_FORMAT_NO_OUTPUT; | |
4475 | *fmt |= DIFF_FORMAT_PATCH; | |
4476 | } | |
4477 | ||
4478 | static int parse_ws_error_highlight_opt(struct diff_options *opt, const char *arg) | |
4479 | { | |
4480 | int val = parse_ws_error_highlight(arg); | |
4481 | ||
4482 | if (val < 0) { | |
4483 | error("unknown value after ws-error-highlight=%.*s", | |
4484 | -1 - val, arg); | |
4485 | return 0; | |
4486 | } | |
4487 | opt->ws_error_highlight = val; | |
4488 | return 1; | |
4489 | } | |
4490 | ||
4491 | static int parse_objfind_opt(struct diff_options *opt, const char *arg) | |
4492 | { | |
4493 | struct object_id oid; | |
4494 | ||
4495 | if (get_oid(arg, &oid)) | |
4496 | return error("unable to resolve '%s'", arg); | |
4497 | ||
4498 | if (!opt->objfind) | |
4499 | opt->objfind = xcalloc(1, sizeof(*opt->objfind)); | |
4500 | ||
4501 | opt->pickaxe_opts |= DIFF_PICKAXE_KIND_OBJFIND; | |
4502 | opt->flags.recursive = 1; | |
4503 | opt->flags.tree_in_recursive = 1; | |
4504 | oidset_insert(opt->objfind, &oid); | |
4505 | return 1; | |
4506 | } | |
4507 | ||
4508 | int diff_opt_parse(struct diff_options *options, | |
4509 | const char **av, int ac, const char *prefix) | |
4510 | { | |
4511 | const char *arg = av[0]; | |
4512 | const char *optarg; | |
4513 | int argcount; | |
4514 | ||
4515 | if (!prefix) | |
4516 | prefix = ""; | |
4517 | ||
4518 | /* Output format options */ | |
4519 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch") | |
4520 | || opt_arg(arg, 'U', "unified", &options->context)) | |
4521 | enable_patch_output(&options->output_format); | |
4522 | else if (!strcmp(arg, "--raw")) | |
4523 | options->output_format |= DIFF_FORMAT_RAW; | |
4524 | else if (!strcmp(arg, "--patch-with-raw")) { | |
4525 | enable_patch_output(&options->output_format); | |
4526 | options->output_format |= DIFF_FORMAT_RAW; | |
4527 | } else if (!strcmp(arg, "--numstat")) | |
4528 | options->output_format |= DIFF_FORMAT_NUMSTAT; | |
4529 | else if (!strcmp(arg, "--shortstat")) | |
4530 | options->output_format |= DIFF_FORMAT_SHORTSTAT; | |
4531 | else if (skip_prefix(arg, "-X", &arg) || | |
4532 | skip_to_optional_arg(arg, "--dirstat", &arg)) | |
4533 | return parse_dirstat_opt(options, arg); | |
4534 | else if (!strcmp(arg, "--cumulative")) | |
4535 | return parse_dirstat_opt(options, "cumulative"); | |
4536 | else if (skip_to_optional_arg(arg, "--dirstat-by-file", &arg)) { | |
4537 | parse_dirstat_opt(options, "files"); | |
4538 | return parse_dirstat_opt(options, arg); | |
4539 | } | |
4540 | else if (!strcmp(arg, "--check")) | |
4541 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
4542 | else if (!strcmp(arg, "--summary")) | |
4543 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
4544 | else if (!strcmp(arg, "--patch-with-stat")) { | |
4545 | enable_patch_output(&options->output_format); | |
4546 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
4547 | } else if (!strcmp(arg, "--name-only")) | |
4548 | options->output_format |= DIFF_FORMAT_NAME; | |
4549 | else if (!strcmp(arg, "--name-status")) | |
4550 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
4551 | else if (!strcmp(arg, "-s") || !strcmp(arg, "--no-patch")) | |
4552 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
4553 | else if (starts_with(arg, "--stat")) | |
4554 | /* --stat, --stat-width, --stat-name-width, or --stat-count */ | |
4555 | return stat_opt(options, av); | |
4556 | ||
4557 | /* renames options */ | |
4558 | else if (starts_with(arg, "-B") || | |
4559 | skip_to_optional_arg(arg, "--break-rewrites", NULL)) { | |
4560 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) | |
4561 | return error("invalid argument to -B: %s", arg+2); | |
4562 | } | |
4563 | else if (starts_with(arg, "-M") || | |
4564 | skip_to_optional_arg(arg, "--find-renames", NULL)) { | |
4565 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
4566 | return error("invalid argument to -M: %s", arg+2); | |
4567 | options->detect_rename = DIFF_DETECT_RENAME; | |
4568 | } | |
4569 | else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { | |
4570 | options->irreversible_delete = 1; | |
4571 | } | |
4572 | else if (starts_with(arg, "-C") || | |
4573 | skip_to_optional_arg(arg, "--find-copies", NULL)) { | |
4574 | if (options->detect_rename == DIFF_DETECT_COPY) | |
4575 | options->flags.find_copies_harder = 1; | |
4576 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
4577 | return error("invalid argument to -C: %s", arg+2); | |
4578 | options->detect_rename = DIFF_DETECT_COPY; | |
4579 | } | |
4580 | else if (!strcmp(arg, "--no-renames")) | |
4581 | options->detect_rename = 0; | |
4582 | else if (!strcmp(arg, "--rename-empty")) | |
4583 | options->flags.rename_empty = 1; | |
4584 | else if (!strcmp(arg, "--no-rename-empty")) | |
4585 | options->flags.rename_empty = 0; | |
4586 | else if (skip_to_optional_arg_default(arg, "--relative", &arg, NULL)) { | |
4587 | options->flags.relative_name = 1; | |
4588 | if (arg) | |
4589 | options->prefix = arg; | |
4590 | } | |
4591 | ||
4592 | /* xdiff options */ | |
4593 | else if (!strcmp(arg, "--minimal")) | |
4594 | DIFF_XDL_SET(options, NEED_MINIMAL); | |
4595 | else if (!strcmp(arg, "--no-minimal")) | |
4596 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
4597 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) | |
4598 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); | |
4599 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) | |
4600 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); | |
4601 | else if (!strcmp(arg, "--ignore-space-at-eol")) | |
4602 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); | |
4603 | else if (!strcmp(arg, "--ignore-cr-at-eol")) | |
4604 | DIFF_XDL_SET(options, IGNORE_CR_AT_EOL); | |
4605 | else if (!strcmp(arg, "--ignore-blank-lines")) | |
4606 | DIFF_XDL_SET(options, IGNORE_BLANK_LINES); | |
4607 | else if (!strcmp(arg, "--indent-heuristic")) | |
4608 | DIFF_XDL_SET(options, INDENT_HEURISTIC); | |
4609 | else if (!strcmp(arg, "--no-indent-heuristic")) | |
4610 | DIFF_XDL_CLR(options, INDENT_HEURISTIC); | |
4611 | else if (!strcmp(arg, "--patience")) { | |
4612 | int i; | |
4613 | options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); | |
4614 | /* | |
4615 | * Both --patience and --anchored use PATIENCE_DIFF | |
4616 | * internally, so remove any anchors previously | |
4617 | * specified. | |
4618 | */ | |
4619 | for (i = 0; i < options->anchors_nr; i++) | |
4620 | free(options->anchors[i]); | |
4621 | options->anchors_nr = 0; | |
4622 | } else if (!strcmp(arg, "--histogram")) | |
4623 | options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF); | |
4624 | else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) { | |
4625 | long value = parse_algorithm_value(optarg); | |
4626 | if (value < 0) | |
4627 | return error("option diff-algorithm accepts \"myers\", " | |
4628 | "\"minimal\", \"patience\" and \"histogram\""); | |
4629 | /* clear out previous settings */ | |
4630 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
4631 | options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK; | |
4632 | options->xdl_opts |= value; | |
4633 | return argcount; | |
4634 | } else if (skip_prefix(arg, "--anchored=", &arg)) { | |
4635 | options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); | |
4636 | ALLOC_GROW(options->anchors, options->anchors_nr + 1, | |
4637 | options->anchors_alloc); | |
4638 | options->anchors[options->anchors_nr++] = xstrdup(arg); | |
4639 | } | |
4640 | ||
4641 | /* flags options */ | |
4642 | else if (!strcmp(arg, "--binary")) { | |
4643 | enable_patch_output(&options->output_format); | |
4644 | options->flags.binary = 1; | |
4645 | } | |
4646 | else if (!strcmp(arg, "--full-index")) | |
4647 | options->flags.full_index = 1; | |
4648 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
4649 | options->flags.text = 1; | |
4650 | else if (!strcmp(arg, "-R")) | |
4651 | options->flags.reverse_diff = 1; | |
4652 | else if (!strcmp(arg, "--find-copies-harder")) | |
4653 | options->flags.find_copies_harder = 1; | |
4654 | else if (!strcmp(arg, "--follow")) | |
4655 | options->flags.follow_renames = 1; | |
4656 | else if (!strcmp(arg, "--no-follow")) { | |
4657 | options->flags.follow_renames = 0; | |
4658 | options->flags.default_follow_renames = 0; | |
4659 | } else if (skip_to_optional_arg_default(arg, "--color", &arg, "always")) { | |
4660 | int value = git_config_colorbool(NULL, arg); | |
4661 | if (value < 0) | |
4662 | return error("option `color' expects \"always\", \"auto\", or \"never\""); | |
4663 | options->use_color = value; | |
4664 | } | |
4665 | else if (!strcmp(arg, "--no-color")) | |
4666 | options->use_color = 0; | |
4667 | else if (!strcmp(arg, "--color-moved")) { | |
4668 | if (diff_color_moved_default) | |
4669 | options->color_moved = diff_color_moved_default; | |
4670 | if (options->color_moved == COLOR_MOVED_NO) | |
4671 | options->color_moved = COLOR_MOVED_DEFAULT; | |
4672 | } else if (!strcmp(arg, "--no-color-moved")) | |
4673 | options->color_moved = COLOR_MOVED_NO; | |
4674 | else if (skip_prefix(arg, "--color-moved=", &arg)) { | |
4675 | int cm = parse_color_moved(arg); | |
4676 | if (cm < 0) | |
4677 | die("bad --color-moved argument: %s", arg); | |
4678 | options->color_moved = cm; | |
4679 | } else if (skip_to_optional_arg_default(arg, "--color-words", &options->word_regex, NULL)) { | |
4680 | options->use_color = 1; | |
4681 | options->word_diff = DIFF_WORDS_COLOR; | |
4682 | } | |
4683 | else if (!strcmp(arg, "--word-diff")) { | |
4684 | if (options->word_diff == DIFF_WORDS_NONE) | |
4685 | options->word_diff = DIFF_WORDS_PLAIN; | |
4686 | } | |
4687 | else if (skip_prefix(arg, "--word-diff=", &arg)) { | |
4688 | if (!strcmp(arg, "plain")) | |
4689 | options->word_diff = DIFF_WORDS_PLAIN; | |
4690 | else if (!strcmp(arg, "color")) { | |
4691 | options->use_color = 1; | |
4692 | options->word_diff = DIFF_WORDS_COLOR; | |
4693 | } | |
4694 | else if (!strcmp(arg, "porcelain")) | |
4695 | options->word_diff = DIFF_WORDS_PORCELAIN; | |
4696 | else if (!strcmp(arg, "none")) | |
4697 | options->word_diff = DIFF_WORDS_NONE; | |
4698 | else | |
4699 | die("bad --word-diff argument: %s", arg); | |
4700 | } | |
4701 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { | |
4702 | if (options->word_diff == DIFF_WORDS_NONE) | |
4703 | options->word_diff = DIFF_WORDS_PLAIN; | |
4704 | options->word_regex = optarg; | |
4705 | return argcount; | |
4706 | } | |
4707 | else if (!strcmp(arg, "--exit-code")) | |
4708 | options->flags.exit_with_status = 1; | |
4709 | else if (!strcmp(arg, "--quiet")) | |
4710 | options->flags.quick = 1; | |
4711 | else if (!strcmp(arg, "--ext-diff")) | |
4712 | options->flags.allow_external = 1; | |
4713 | else if (!strcmp(arg, "--no-ext-diff")) | |
4714 | options->flags.allow_external = 0; | |
4715 | else if (!strcmp(arg, "--textconv")) { | |
4716 | options->flags.allow_textconv = 1; | |
4717 | options->flags.textconv_set_via_cmdline = 1; | |
4718 | } else if (!strcmp(arg, "--no-textconv")) | |
4719 | options->flags.allow_textconv = 0; | |
4720 | else if (skip_to_optional_arg_default(arg, "--ignore-submodules", &arg, "all")) { | |
4721 | options->flags.override_submodule_config = 1; | |
4722 | handle_ignore_submodules_arg(options, arg); | |
4723 | } else if (skip_to_optional_arg_default(arg, "--submodule", &arg, "log")) | |
4724 | return parse_submodule_opt(options, arg); | |
4725 | else if (skip_prefix(arg, "--ws-error-highlight=", &arg)) | |
4726 | return parse_ws_error_highlight_opt(options, arg); | |
4727 | else if (!strcmp(arg, "--ita-invisible-in-index")) | |
4728 | options->ita_invisible_in_index = 1; | |
4729 | else if (!strcmp(arg, "--ita-visible-in-index")) | |
4730 | options->ita_invisible_in_index = 0; | |
4731 | ||
4732 | /* misc options */ | |
4733 | else if (!strcmp(arg, "-z")) | |
4734 | options->line_termination = 0; | |
4735 | else if ((argcount = short_opt('l', av, &optarg))) { | |
4736 | options->rename_limit = strtoul(optarg, NULL, 10); | |
4737 | return argcount; | |
4738 | } | |
4739 | else if ((argcount = short_opt('S', av, &optarg))) { | |
4740 | options->pickaxe = optarg; | |
4741 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; | |
4742 | return argcount; | |
4743 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
4744 | options->pickaxe = optarg; | |
4745 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
4746 | return argcount; | |
4747 | } | |
4748 | else if (!strcmp(arg, "--pickaxe-all")) | |
4749 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; | |
4750 | else if (!strcmp(arg, "--pickaxe-regex")) | |
4751 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; | |
4752 | else if ((argcount = short_opt('O', av, &optarg))) { | |
4753 | options->orderfile = prefix_filename(prefix, optarg); | |
4754 | return argcount; | |
4755 | } else if (skip_prefix(arg, "--find-object=", &arg)) | |
4756 | return parse_objfind_opt(options, arg); | |
4757 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
4758 | int offending = parse_diff_filter_opt(optarg, options); | |
4759 | if (offending) | |
4760 | die("unknown change class '%c' in --diff-filter=%s", | |
4761 | offending, optarg); | |
4762 | return argcount; | |
4763 | } | |
4764 | else if (!strcmp(arg, "--no-abbrev")) | |
4765 | options->abbrev = 0; | |
4766 | else if (!strcmp(arg, "--abbrev")) | |
4767 | options->abbrev = DEFAULT_ABBREV; | |
4768 | else if (skip_prefix(arg, "--abbrev=", &arg)) { | |
4769 | options->abbrev = strtoul(arg, NULL, 10); | |
4770 | if (options->abbrev < MINIMUM_ABBREV) | |
4771 | options->abbrev = MINIMUM_ABBREV; | |
4772 | else if (40 < options->abbrev) | |
4773 | options->abbrev = 40; | |
4774 | } | |
4775 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { | |
4776 | options->a_prefix = optarg; | |
4777 | return argcount; | |
4778 | } | |
4779 | else if ((argcount = parse_long_opt("line-prefix", av, &optarg))) { | |
4780 | options->line_prefix = optarg; | |
4781 | options->line_prefix_length = strlen(options->line_prefix); | |
4782 | graph_setup_line_prefix(options); | |
4783 | return argcount; | |
4784 | } | |
4785 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { | |
4786 | options->b_prefix = optarg; | |
4787 | return argcount; | |
4788 | } | |
4789 | else if (!strcmp(arg, "--no-prefix")) | |
4790 | options->a_prefix = options->b_prefix = ""; | |
4791 | else if (opt_arg(arg, '\0', "inter-hunk-context", | |
4792 | &options->interhunkcontext)) | |
4793 | ; | |
4794 | else if (!strcmp(arg, "-W")) | |
4795 | options->flags.funccontext = 1; | |
4796 | else if (!strcmp(arg, "--function-context")) | |
4797 | options->flags.funccontext = 1; | |
4798 | else if (!strcmp(arg, "--no-function-context")) | |
4799 | options->flags.funccontext = 0; | |
4800 | else if ((argcount = parse_long_opt("output", av, &optarg))) { | |
4801 | char *path = prefix_filename(prefix, optarg); | |
4802 | options->file = xfopen(path, "w"); | |
4803 | options->close_file = 1; | |
4804 | if (options->use_color != GIT_COLOR_ALWAYS) | |
4805 | options->use_color = GIT_COLOR_NEVER; | |
4806 | free(path); | |
4807 | return argcount; | |
4808 | } else | |
4809 | return 0; | |
4810 | return 1; | |
4811 | } | |
4812 | ||
4813 | int parse_rename_score(const char **cp_p) | |
4814 | { | |
4815 | unsigned long num, scale; | |
4816 | int ch, dot; | |
4817 | const char *cp = *cp_p; | |
4818 | ||
4819 | num = 0; | |
4820 | scale = 1; | |
4821 | dot = 0; | |
4822 | for (;;) { | |
4823 | ch = *cp; | |
4824 | if ( !dot && ch == '.' ) { | |
4825 | scale = 1; | |
4826 | dot = 1; | |
4827 | } else if ( ch == '%' ) { | |
4828 | scale = dot ? scale*100 : 100; | |
4829 | cp++; /* % is always at the end */ | |
4830 | break; | |
4831 | } else if ( ch >= '0' && ch <= '9' ) { | |
4832 | if ( scale < 100000 ) { | |
4833 | scale *= 10; | |
4834 | num = (num*10) + (ch-'0'); | |
4835 | } | |
4836 | } else { | |
4837 | break; | |
4838 | } | |
4839 | cp++; | |
4840 | } | |
4841 | *cp_p = cp; | |
4842 | ||
4843 | /* user says num divided by scale and we say internally that | |
4844 | * is MAX_SCORE * num / scale. | |
4845 | */ | |
4846 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); | |
4847 | } | |
4848 | ||
4849 | static int diff_scoreopt_parse(const char *opt) | |
4850 | { | |
4851 | int opt1, opt2, cmd; | |
4852 | ||
4853 | if (*opt++ != '-') | |
4854 | return -1; | |
4855 | cmd = *opt++; | |
4856 | if (cmd == '-') { | |
4857 | /* convert the long-form arguments into short-form versions */ | |
4858 | if (skip_prefix(opt, "break-rewrites", &opt)) { | |
4859 | if (*opt == 0 || *opt++ == '=') | |
4860 | cmd = 'B'; | |
4861 | } else if (skip_prefix(opt, "find-copies", &opt)) { | |
4862 | if (*opt == 0 || *opt++ == '=') | |
4863 | cmd = 'C'; | |
4864 | } else if (skip_prefix(opt, "find-renames", &opt)) { | |
4865 | if (*opt == 0 || *opt++ == '=') | |
4866 | cmd = 'M'; | |
4867 | } | |
4868 | } | |
4869 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
4870 | return -1; /* that is not a -M, -C, or -B option */ | |
4871 | ||
4872 | opt1 = parse_rename_score(&opt); | |
4873 | if (cmd != 'B') | |
4874 | opt2 = 0; | |
4875 | else { | |
4876 | if (*opt == 0) | |
4877 | opt2 = 0; | |
4878 | else if (*opt != '/') | |
4879 | return -1; /* we expect -B80/99 or -B80 */ | |
4880 | else { | |
4881 | opt++; | |
4882 | opt2 = parse_rename_score(&opt); | |
4883 | } | |
4884 | } | |
4885 | if (*opt != 0) | |
4886 | return -1; | |
4887 | return opt1 | (opt2 << 16); | |
4888 | } | |
4889 | ||
4890 | struct diff_queue_struct diff_queued_diff; | |
4891 | ||
4892 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
4893 | { | |
4894 | ALLOC_GROW(queue->queue, queue->nr + 1, queue->alloc); | |
4895 | queue->queue[queue->nr++] = dp; | |
4896 | } | |
4897 | ||
4898 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
4899 | struct diff_filespec *one, | |
4900 | struct diff_filespec *two) | |
4901 | { | |
4902 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); | |
4903 | dp->one = one; | |
4904 | dp->two = two; | |
4905 | if (queue) | |
4906 | diff_q(queue, dp); | |
4907 | return dp; | |
4908 | } | |
4909 | ||
4910 | void diff_free_filepair(struct diff_filepair *p) | |
4911 | { | |
4912 | free_filespec(p->one); | |
4913 | free_filespec(p->two); | |
4914 | free(p); | |
4915 | } | |
4916 | ||
4917 | const char *diff_aligned_abbrev(const struct object_id *oid, int len) | |
4918 | { | |
4919 | int abblen; | |
4920 | const char *abbrev; | |
4921 | ||
4922 | /* Do we want all 40 hex characters? */ | |
4923 | if (len == GIT_SHA1_HEXSZ) | |
4924 | return oid_to_hex(oid); | |
4925 | ||
4926 | /* An abbreviated value is fine, possibly followed by an ellipsis. */ | |
4927 | abbrev = diff_abbrev_oid(oid, len); | |
4928 | ||
4929 | if (!print_sha1_ellipsis()) | |
4930 | return abbrev; | |
4931 | ||
4932 | abblen = strlen(abbrev); | |
4933 | ||
4934 | /* | |
4935 | * In well-behaved cases, where the abbreviated result is the | |
4936 | * same as the requested length, append three dots after the | |
4937 | * abbreviation (hence the whole logic is limited to the case | |
4938 | * where abblen < 37); when the actual abbreviated result is a | |
4939 | * bit longer than the requested length, we reduce the number | |
4940 | * of dots so that they match the well-behaved ones. However, | |
4941 | * if the actual abbreviation is longer than the requested | |
4942 | * length by more than three, we give up on aligning, and add | |
4943 | * three dots anyway, to indicate that the output is not the | |
4944 | * full object name. Yes, this may be suboptimal, but this | |
4945 | * appears only in "diff --raw --abbrev" output and it is not | |
4946 | * worth the effort to change it now. Note that this would | |
4947 | * likely to work fine when the automatic sizing of default | |
4948 | * abbreviation length is used--we would be fed -1 in "len" in | |
4949 | * that case, and will end up always appending three-dots, but | |
4950 | * the automatic sizing is supposed to give abblen that ensures | |
4951 | * uniqueness across all objects (statistically speaking). | |
4952 | */ | |
4953 | if (abblen < GIT_SHA1_HEXSZ - 3) { | |
4954 | static char hex[GIT_MAX_HEXSZ + 1]; | |
4955 | if (len < abblen && abblen <= len + 2) | |
4956 | xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, ".."); | |
4957 | else | |
4958 | xsnprintf(hex, sizeof(hex), "%s...", abbrev); | |
4959 | return hex; | |
4960 | } | |
4961 | ||
4962 | return oid_to_hex(oid); | |
4963 | } | |
4964 | ||
4965 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) | |
4966 | { | |
4967 | int line_termination = opt->line_termination; | |
4968 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
4969 | ||
4970 | fprintf(opt->file, "%s", diff_line_prefix(opt)); | |
4971 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { | |
4972 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, | |
4973 | diff_aligned_abbrev(&p->one->oid, opt->abbrev)); | |
4974 | fprintf(opt->file, "%s ", | |
4975 | diff_aligned_abbrev(&p->two->oid, opt->abbrev)); | |
4976 | } | |
4977 | if (p->score) { | |
4978 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), | |
4979 | inter_name_termination); | |
4980 | } else { | |
4981 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); | |
4982 | } | |
4983 | ||
4984 | if (p->status == DIFF_STATUS_COPIED || | |
4985 | p->status == DIFF_STATUS_RENAMED) { | |
4986 | const char *name_a, *name_b; | |
4987 | name_a = p->one->path; | |
4988 | name_b = p->two->path; | |
4989 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
4990 | write_name_quoted(name_a, opt->file, inter_name_termination); | |
4991 | write_name_quoted(name_b, opt->file, line_termination); | |
4992 | } else { | |
4993 | const char *name_a, *name_b; | |
4994 | name_a = p->one->mode ? p->one->path : p->two->path; | |
4995 | name_b = NULL; | |
4996 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
4997 | write_name_quoted(name_a, opt->file, line_termination); | |
4998 | } | |
4999 | } | |
5000 | ||
5001 | int diff_unmodified_pair(struct diff_filepair *p) | |
5002 | { | |
5003 | /* This function is written stricter than necessary to support | |
5004 | * the currently implemented transformers, but the idea is to | |
5005 | * let transformers to produce diff_filepairs any way they want, | |
5006 | * and filter and clean them up here before producing the output. | |
5007 | */ | |
5008 | struct diff_filespec *one = p->one, *two = p->two; | |
5009 | ||
5010 | if (DIFF_PAIR_UNMERGED(p)) | |
5011 | return 0; /* unmerged is interesting */ | |
5012 | ||
5013 | /* deletion, addition, mode or type change | |
5014 | * and rename are all interesting. | |
5015 | */ | |
5016 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
5017 | DIFF_PAIR_MODE_CHANGED(p) || | |
5018 | strcmp(one->path, two->path)) | |
5019 | return 0; | |
5020 | ||
5021 | /* both are valid and point at the same path. that is, we are | |
5022 | * dealing with a change. | |
5023 | */ | |
5024 | if (one->oid_valid && two->oid_valid && | |
5025 | !oidcmp(&one->oid, &two->oid) && | |
5026 | !one->dirty_submodule && !two->dirty_submodule) | |
5027 | return 1; /* no change */ | |
5028 | if (!one->oid_valid && !two->oid_valid) | |
5029 | return 1; /* both look at the same file on the filesystem. */ | |
5030 | return 0; | |
5031 | } | |
5032 | ||
5033 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
5034 | { | |
5035 | if (diff_unmodified_pair(p)) | |
5036 | return; | |
5037 | ||
5038 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
5039 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
5040 | return; /* no tree diffs in patch format */ | |
5041 | ||
5042 | run_diff(p, o); | |
5043 | } | |
5044 | ||
5045 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
5046 | struct diffstat_t *diffstat) | |
5047 | { | |
5048 | if (diff_unmodified_pair(p)) | |
5049 | return; | |
5050 | ||
5051 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
5052 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
5053 | return; /* no useful stat for tree diffs */ | |
5054 | ||
5055 | run_diffstat(p, o, diffstat); | |
5056 | } | |
5057 | ||
5058 | static void diff_flush_checkdiff(struct diff_filepair *p, | |
5059 | struct diff_options *o) | |
5060 | { | |
5061 | if (diff_unmodified_pair(p)) | |
5062 | return; | |
5063 | ||
5064 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
5065 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
5066 | return; /* nothing to check in tree diffs */ | |
5067 | ||
5068 | run_checkdiff(p, o); | |
5069 | } | |
5070 | ||
5071 | int diff_queue_is_empty(void) | |
5072 | { | |
5073 | struct diff_queue_struct *q = &diff_queued_diff; | |
5074 | int i; | |
5075 | for (i = 0; i < q->nr; i++) | |
5076 | if (!diff_unmodified_pair(q->queue[i])) | |
5077 | return 0; | |
5078 | return 1; | |
5079 | } | |
5080 | ||
5081 | #if DIFF_DEBUG | |
5082 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
5083 | { | |
5084 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
5085 | x, one ? one : "", | |
5086 | s->path, | |
5087 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
5088 | s->mode, | |
5089 | s->oid_valid ? oid_to_hex(&s->oid) : ""); | |
5090 | fprintf(stderr, "queue[%d] %s size %lu\n", | |
5091 | x, one ? one : "", | |
5092 | s->size); | |
5093 | } | |
5094 | ||
5095 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
5096 | { | |
5097 | diff_debug_filespec(p->one, i, "one"); | |
5098 | diff_debug_filespec(p->two, i, "two"); | |
5099 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", | |
5100 | p->score, p->status ? p->status : '?', | |
5101 | p->one->rename_used, p->broken_pair); | |
5102 | } | |
5103 | ||
5104 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
5105 | { | |
5106 | int i; | |
5107 | if (msg) | |
5108 | fprintf(stderr, "%s\n", msg); | |
5109 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
5110 | for (i = 0; i < q->nr; i++) { | |
5111 | struct diff_filepair *p = q->queue[i]; | |
5112 | diff_debug_filepair(p, i); | |
5113 | } | |
5114 | } | |
5115 | #endif | |
5116 | ||
5117 | static void diff_resolve_rename_copy(void) | |
5118 | { | |
5119 | int i; | |
5120 | struct diff_filepair *p; | |
5121 | struct diff_queue_struct *q = &diff_queued_diff; | |
5122 | ||
5123 | diff_debug_queue("resolve-rename-copy", q); | |
5124 | ||
5125 | for (i = 0; i < q->nr; i++) { | |
5126 | p = q->queue[i]; | |
5127 | p->status = 0; /* undecided */ | |
5128 | if (DIFF_PAIR_UNMERGED(p)) | |
5129 | p->status = DIFF_STATUS_UNMERGED; | |
5130 | else if (!DIFF_FILE_VALID(p->one)) | |
5131 | p->status = DIFF_STATUS_ADDED; | |
5132 | else if (!DIFF_FILE_VALID(p->two)) | |
5133 | p->status = DIFF_STATUS_DELETED; | |
5134 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
5135 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
5136 | ||
5137 | /* from this point on, we are dealing with a pair | |
5138 | * whose both sides are valid and of the same type, i.e. | |
5139 | * either in-place edit or rename/copy edit. | |
5140 | */ | |
5141 | else if (DIFF_PAIR_RENAME(p)) { | |
5142 | /* | |
5143 | * A rename might have re-connected a broken | |
5144 | * pair up, causing the pathnames to be the | |
5145 | * same again. If so, that's not a rename at | |
5146 | * all, just a modification.. | |
5147 | * | |
5148 | * Otherwise, see if this source was used for | |
5149 | * multiple renames, in which case we decrement | |
5150 | * the count, and call it a copy. | |
5151 | */ | |
5152 | if (!strcmp(p->one->path, p->two->path)) | |
5153 | p->status = DIFF_STATUS_MODIFIED; | |
5154 | else if (--p->one->rename_used > 0) | |
5155 | p->status = DIFF_STATUS_COPIED; | |
5156 | else | |
5157 | p->status = DIFF_STATUS_RENAMED; | |
5158 | } | |
5159 | else if (oidcmp(&p->one->oid, &p->two->oid) || | |
5160 | p->one->mode != p->two->mode || | |
5161 | p->one->dirty_submodule || | |
5162 | p->two->dirty_submodule || | |
5163 | is_null_oid(&p->one->oid)) | |
5164 | p->status = DIFF_STATUS_MODIFIED; | |
5165 | else { | |
5166 | /* This is a "no-change" entry and should not | |
5167 | * happen anymore, but prepare for broken callers. | |
5168 | */ | |
5169 | error("feeding unmodified %s to diffcore", | |
5170 | p->one->path); | |
5171 | p->status = DIFF_STATUS_UNKNOWN; | |
5172 | } | |
5173 | } | |
5174 | diff_debug_queue("resolve-rename-copy done", q); | |
5175 | } | |
5176 | ||
5177 | static int check_pair_status(struct diff_filepair *p) | |
5178 | { | |
5179 | switch (p->status) { | |
5180 | case DIFF_STATUS_UNKNOWN: | |
5181 | return 0; | |
5182 | case 0: | |
5183 | die("internal error in diff-resolve-rename-copy"); | |
5184 | default: | |
5185 | return 1; | |
5186 | } | |
5187 | } | |
5188 | ||
5189 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) | |
5190 | { | |
5191 | int fmt = opt->output_format; | |
5192 | ||
5193 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
5194 | diff_flush_checkdiff(p, opt); | |
5195 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
5196 | diff_flush_raw(p, opt); | |
5197 | else if (fmt & DIFF_FORMAT_NAME) { | |
5198 | const char *name_a, *name_b; | |
5199 | name_a = p->two->path; | |
5200 | name_b = NULL; | |
5201 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
5202 | fprintf(opt->file, "%s", diff_line_prefix(opt)); | |
5203 | write_name_quoted(name_a, opt->file, opt->line_termination); | |
5204 | } | |
5205 | } | |
5206 | ||
5207 | static void show_file_mode_name(struct diff_options *opt, const char *newdelete, struct diff_filespec *fs) | |
5208 | { | |
5209 | struct strbuf sb = STRBUF_INIT; | |
5210 | if (fs->mode) | |
5211 | strbuf_addf(&sb, " %s mode %06o ", newdelete, fs->mode); | |
5212 | else | |
5213 | strbuf_addf(&sb, " %s ", newdelete); | |
5214 | ||
5215 | quote_c_style(fs->path, &sb, NULL, 0); | |
5216 | strbuf_addch(&sb, '\n'); | |
5217 | emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY, | |
5218 | sb.buf, sb.len, 0); | |
5219 | strbuf_release(&sb); | |
5220 | } | |
5221 | ||
5222 | static void show_mode_change(struct diff_options *opt, struct diff_filepair *p, | |
5223 | int show_name) | |
5224 | { | |
5225 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
5226 | struct strbuf sb = STRBUF_INIT; | |
5227 | strbuf_addf(&sb, " mode change %06o => %06o", | |
5228 | p->one->mode, p->two->mode); | |
5229 | if (show_name) { | |
5230 | strbuf_addch(&sb, ' '); | |
5231 | quote_c_style(p->two->path, &sb, NULL, 0); | |
5232 | } | |
5233 | strbuf_addch(&sb, '\n'); | |
5234 | emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY, | |
5235 | sb.buf, sb.len, 0); | |
5236 | strbuf_release(&sb); | |
5237 | } | |
5238 | } | |
5239 | ||
5240 | static void show_rename_copy(struct diff_options *opt, const char *renamecopy, | |
5241 | struct diff_filepair *p) | |
5242 | { | |
5243 | struct strbuf sb = STRBUF_INIT; | |
5244 | char *names = pprint_rename(p->one->path, p->two->path); | |
5245 | strbuf_addf(&sb, " %s %s (%d%%)\n", | |
5246 | renamecopy, names, similarity_index(p)); | |
5247 | free(names); | |
5248 | emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY, | |
5249 | sb.buf, sb.len, 0); | |
5250 | show_mode_change(opt, p, 0); | |
5251 | strbuf_release(&sb); | |
5252 | } | |
5253 | ||
5254 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) | |
5255 | { | |
5256 | switch(p->status) { | |
5257 | case DIFF_STATUS_DELETED: | |
5258 | show_file_mode_name(opt, "delete", p->one); | |
5259 | break; | |
5260 | case DIFF_STATUS_ADDED: | |
5261 | show_file_mode_name(opt, "create", p->two); | |
5262 | break; | |
5263 | case DIFF_STATUS_COPIED: | |
5264 | show_rename_copy(opt, "copy", p); | |
5265 | break; | |
5266 | case DIFF_STATUS_RENAMED: | |
5267 | show_rename_copy(opt, "rename", p); | |
5268 | break; | |
5269 | default: | |
5270 | if (p->score) { | |
5271 | struct strbuf sb = STRBUF_INIT; | |
5272 | strbuf_addstr(&sb, " rewrite "); | |
5273 | quote_c_style(p->two->path, &sb, NULL, 0); | |
5274 | strbuf_addf(&sb, " (%d%%)\n", similarity_index(p)); | |
5275 | emit_diff_symbol(opt, DIFF_SYMBOL_SUMMARY, | |
5276 | sb.buf, sb.len, 0); | |
5277 | strbuf_release(&sb); | |
5278 | } | |
5279 | show_mode_change(opt, p, !p->score); | |
5280 | break; | |
5281 | } | |
5282 | } | |
5283 | ||
5284 | struct patch_id_t { | |
5285 | git_SHA_CTX *ctx; | |
5286 | int patchlen; | |
5287 | }; | |
5288 | ||
5289 | static int remove_space(char *line, int len) | |
5290 | { | |
5291 | int i; | |
5292 | char *dst = line; | |
5293 | unsigned char c; | |
5294 | ||
5295 | for (i = 0; i < len; i++) | |
5296 | if (!isspace((c = line[i]))) | |
5297 | *dst++ = c; | |
5298 | ||
5299 | return dst - line; | |
5300 | } | |
5301 | ||
5302 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
5303 | { | |
5304 | struct patch_id_t *data = priv; | |
5305 | int new_len; | |
5306 | ||
5307 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
5308 | if (starts_with(line, "@@ -")) | |
5309 | return; | |
5310 | ||
5311 | new_len = remove_space(line, len); | |
5312 | ||
5313 | git_SHA1_Update(data->ctx, line, new_len); | |
5314 | data->patchlen += new_len; | |
5315 | } | |
5316 | ||
5317 | static void patch_id_add_string(git_SHA_CTX *ctx, const char *str) | |
5318 | { | |
5319 | git_SHA1_Update(ctx, str, strlen(str)); | |
5320 | } | |
5321 | ||
5322 | static void patch_id_add_mode(git_SHA_CTX *ctx, unsigned mode) | |
5323 | { | |
5324 | /* large enough for 2^32 in octal */ | |
5325 | char buf[12]; | |
5326 | int len = xsnprintf(buf, sizeof(buf), "%06o", mode); | |
5327 | git_SHA1_Update(ctx, buf, len); | |
5328 | } | |
5329 | ||
5330 | /* returns 0 upon success, and writes result into sha1 */ | |
5331 | static int diff_get_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only) | |
5332 | { | |
5333 | struct diff_queue_struct *q = &diff_queued_diff; | |
5334 | int i; | |
5335 | git_SHA_CTX ctx; | |
5336 | struct patch_id_t data; | |
5337 | ||
5338 | git_SHA1_Init(&ctx); | |
5339 | memset(&data, 0, sizeof(struct patch_id_t)); | |
5340 | data.ctx = &ctx; | |
5341 | ||
5342 | for (i = 0; i < q->nr; i++) { | |
5343 | xpparam_t xpp; | |
5344 | xdemitconf_t xecfg; | |
5345 | mmfile_t mf1, mf2; | |
5346 | struct diff_filepair *p = q->queue[i]; | |
5347 | int len1, len2; | |
5348 | ||
5349 | memset(&xpp, 0, sizeof(xpp)); | |
5350 | memset(&xecfg, 0, sizeof(xecfg)); | |
5351 | if (p->status == 0) | |
5352 | return error("internal diff status error"); | |
5353 | if (p->status == DIFF_STATUS_UNKNOWN) | |
5354 | continue; | |
5355 | if (diff_unmodified_pair(p)) | |
5356 | continue; | |
5357 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
5358 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
5359 | continue; | |
5360 | if (DIFF_PAIR_UNMERGED(p)) | |
5361 | continue; | |
5362 | ||
5363 | diff_fill_oid_info(p->one); | |
5364 | diff_fill_oid_info(p->two); | |
5365 | ||
5366 | len1 = remove_space(p->one->path, strlen(p->one->path)); | |
5367 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
5368 | patch_id_add_string(&ctx, "diff--git"); | |
5369 | patch_id_add_string(&ctx, "a/"); | |
5370 | git_SHA1_Update(&ctx, p->one->path, len1); | |
5371 | patch_id_add_string(&ctx, "b/"); | |
5372 | git_SHA1_Update(&ctx, p->two->path, len2); | |
5373 | ||
5374 | if (p->one->mode == 0) { | |
5375 | patch_id_add_string(&ctx, "newfilemode"); | |
5376 | patch_id_add_mode(&ctx, p->two->mode); | |
5377 | patch_id_add_string(&ctx, "---/dev/null"); | |
5378 | patch_id_add_string(&ctx, "+++b/"); | |
5379 | git_SHA1_Update(&ctx, p->two->path, len2); | |
5380 | } else if (p->two->mode == 0) { | |
5381 | patch_id_add_string(&ctx, "deletedfilemode"); | |
5382 | patch_id_add_mode(&ctx, p->one->mode); | |
5383 | patch_id_add_string(&ctx, "---a/"); | |
5384 | git_SHA1_Update(&ctx, p->one->path, len1); | |
5385 | patch_id_add_string(&ctx, "+++/dev/null"); | |
5386 | } else { | |
5387 | patch_id_add_string(&ctx, "---a/"); | |
5388 | git_SHA1_Update(&ctx, p->one->path, len1); | |
5389 | patch_id_add_string(&ctx, "+++b/"); | |
5390 | git_SHA1_Update(&ctx, p->two->path, len2); | |
5391 | } | |
5392 | ||
5393 | if (diff_header_only) | |
5394 | continue; | |
5395 | ||
5396 | if (fill_mmfile(&mf1, p->one) < 0 || | |
5397 | fill_mmfile(&mf2, p->two) < 0) | |
5398 | return error("unable to read files to diff"); | |
5399 | ||
5400 | if (diff_filespec_is_binary(p->one) || | |
5401 | diff_filespec_is_binary(p->two)) { | |
5402 | git_SHA1_Update(&ctx, oid_to_hex(&p->one->oid), | |
5403 | GIT_SHA1_HEXSZ); | |
5404 | git_SHA1_Update(&ctx, oid_to_hex(&p->two->oid), | |
5405 | GIT_SHA1_HEXSZ); | |
5406 | continue; | |
5407 | } | |
5408 | ||
5409 | xpp.flags = 0; | |
5410 | xecfg.ctxlen = 3; | |
5411 | xecfg.flags = 0; | |
5412 | if (xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, | |
5413 | &xpp, &xecfg)) | |
5414 | return error("unable to generate patch-id diff for %s", | |
5415 | p->one->path); | |
5416 | } | |
5417 | ||
5418 | git_SHA1_Final(oid->hash, &ctx); | |
5419 | return 0; | |
5420 | } | |
5421 | ||
5422 | int diff_flush_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only) | |
5423 | { | |
5424 | struct diff_queue_struct *q = &diff_queued_diff; | |
5425 | int i; | |
5426 | int result = diff_get_patch_id(options, oid, diff_header_only); | |
5427 | ||
5428 | for (i = 0; i < q->nr; i++) | |
5429 | diff_free_filepair(q->queue[i]); | |
5430 | ||
5431 | free(q->queue); | |
5432 | DIFF_QUEUE_CLEAR(q); | |
5433 | ||
5434 | return result; | |
5435 | } | |
5436 | ||
5437 | static int is_summary_empty(const struct diff_queue_struct *q) | |
5438 | { | |
5439 | int i; | |
5440 | ||
5441 | for (i = 0; i < q->nr; i++) { | |
5442 | const struct diff_filepair *p = q->queue[i]; | |
5443 | ||
5444 | switch (p->status) { | |
5445 | case DIFF_STATUS_DELETED: | |
5446 | case DIFF_STATUS_ADDED: | |
5447 | case DIFF_STATUS_COPIED: | |
5448 | case DIFF_STATUS_RENAMED: | |
5449 | return 0; | |
5450 | default: | |
5451 | if (p->score) | |
5452 | return 0; | |
5453 | if (p->one->mode && p->two->mode && | |
5454 | p->one->mode != p->two->mode) | |
5455 | return 0; | |
5456 | break; | |
5457 | } | |
5458 | } | |
5459 | return 1; | |
5460 | } | |
5461 | ||
5462 | static const char rename_limit_warning[] = | |
5463 | N_("inexact rename detection was skipped due to too many files."); | |
5464 | ||
5465 | static const char degrade_cc_to_c_warning[] = | |
5466 | N_("only found copies from modified paths due to too many files."); | |
5467 | ||
5468 | static const char rename_limit_advice[] = | |
5469 | N_("you may want to set your %s variable to at least " | |
5470 | "%d and retry the command."); | |
5471 | ||
5472 | void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) | |
5473 | { | |
5474 | fflush(stdout); | |
5475 | if (degraded_cc) | |
5476 | warning(_(degrade_cc_to_c_warning)); | |
5477 | else if (needed) | |
5478 | warning(_(rename_limit_warning)); | |
5479 | else | |
5480 | return; | |
5481 | if (0 < needed) | |
5482 | warning(_(rename_limit_advice), varname, needed); | |
5483 | } | |
5484 | ||
5485 | static void diff_flush_patch_all_file_pairs(struct diff_options *o) | |
5486 | { | |
5487 | int i; | |
5488 | static struct emitted_diff_symbols esm = EMITTED_DIFF_SYMBOLS_INIT; | |
5489 | struct diff_queue_struct *q = &diff_queued_diff; | |
5490 | ||
5491 | if (WSEH_NEW & WS_RULE_MASK) | |
5492 | die("BUG: WS rules bit mask overlaps with diff symbol flags"); | |
5493 | ||
5494 | if (o->color_moved) | |
5495 | o->emitted_symbols = &esm; | |
5496 | ||
5497 | for (i = 0; i < q->nr; i++) { | |
5498 | struct diff_filepair *p = q->queue[i]; | |
5499 | if (check_pair_status(p)) | |
5500 | diff_flush_patch(p, o); | |
5501 | } | |
5502 | ||
5503 | if (o->emitted_symbols) { | |
5504 | if (o->color_moved) { | |
5505 | struct hashmap add_lines, del_lines; | |
5506 | ||
5507 | hashmap_init(&del_lines, | |
5508 | (hashmap_cmp_fn)moved_entry_cmp, o, 0); | |
5509 | hashmap_init(&add_lines, | |
5510 | (hashmap_cmp_fn)moved_entry_cmp, o, 0); | |
5511 | ||
5512 | add_lines_to_move_detection(o, &add_lines, &del_lines); | |
5513 | mark_color_as_moved(o, &add_lines, &del_lines); | |
5514 | if (o->color_moved == COLOR_MOVED_ZEBRA_DIM) | |
5515 | dim_moved_lines(o); | |
5516 | ||
5517 | hashmap_free(&add_lines, 0); | |
5518 | hashmap_free(&del_lines, 0); | |
5519 | } | |
5520 | ||
5521 | for (i = 0; i < esm.nr; i++) | |
5522 | emit_diff_symbol_from_struct(o, &esm.buf[i]); | |
5523 | ||
5524 | for (i = 0; i < esm.nr; i++) | |
5525 | free((void *)esm.buf[i].line); | |
5526 | } | |
5527 | esm.nr = 0; | |
5528 | } | |
5529 | ||
5530 | void diff_flush(struct diff_options *options) | |
5531 | { | |
5532 | struct diff_queue_struct *q = &diff_queued_diff; | |
5533 | int i, output_format = options->output_format; | |
5534 | int separator = 0; | |
5535 | int dirstat_by_line = 0; | |
5536 | ||
5537 | /* | |
5538 | * Order: raw, stat, summary, patch | |
5539 | * or: name/name-status/checkdiff (other bits clear) | |
5540 | */ | |
5541 | if (!q->nr) | |
5542 | goto free_queue; | |
5543 | ||
5544 | if (output_format & (DIFF_FORMAT_RAW | | |
5545 | DIFF_FORMAT_NAME | | |
5546 | DIFF_FORMAT_NAME_STATUS | | |
5547 | DIFF_FORMAT_CHECKDIFF)) { | |
5548 | for (i = 0; i < q->nr; i++) { | |
5549 | struct diff_filepair *p = q->queue[i]; | |
5550 | if (check_pair_status(p)) | |
5551 | flush_one_pair(p, options); | |
5552 | } | |
5553 | separator++; | |
5554 | } | |
5555 | ||
5556 | if (output_format & DIFF_FORMAT_DIRSTAT && options->flags.dirstat_by_line) | |
5557 | dirstat_by_line = 1; | |
5558 | ||
5559 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || | |
5560 | dirstat_by_line) { | |
5561 | struct diffstat_t diffstat; | |
5562 | ||
5563 | memset(&diffstat, 0, sizeof(struct diffstat_t)); | |
5564 | for (i = 0; i < q->nr; i++) { | |
5565 | struct diff_filepair *p = q->queue[i]; | |
5566 | if (check_pair_status(p)) | |
5567 | diff_flush_stat(p, options, &diffstat); | |
5568 | } | |
5569 | if (output_format & DIFF_FORMAT_NUMSTAT) | |
5570 | show_numstat(&diffstat, options); | |
5571 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
5572 | show_stats(&diffstat, options); | |
5573 | if (output_format & DIFF_FORMAT_SHORTSTAT) | |
5574 | show_shortstats(&diffstat, options); | |
5575 | if (output_format & DIFF_FORMAT_DIRSTAT && dirstat_by_line) | |
5576 | show_dirstat_by_line(&diffstat, options); | |
5577 | free_diffstat_info(&diffstat); | |
5578 | separator++; | |
5579 | } | |
5580 | if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) | |
5581 | show_dirstat(options); | |
5582 | ||
5583 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { | |
5584 | for (i = 0; i < q->nr; i++) { | |
5585 | diff_summary(options, q->queue[i]); | |
5586 | } | |
5587 | separator++; | |
5588 | } | |
5589 | ||
5590 | if (output_format & DIFF_FORMAT_NO_OUTPUT && | |
5591 | options->flags.exit_with_status && | |
5592 | options->flags.diff_from_contents) { | |
5593 | /* | |
5594 | * run diff_flush_patch for the exit status. setting | |
5595 | * options->file to /dev/null should be safe, because we | |
5596 | * aren't supposed to produce any output anyway. | |
5597 | */ | |
5598 | if (options->close_file) | |
5599 | fclose(options->file); | |
5600 | options->file = xfopen("/dev/null", "w"); | |
5601 | options->close_file = 1; | |
5602 | options->color_moved = 0; | |
5603 | for (i = 0; i < q->nr; i++) { | |
5604 | struct diff_filepair *p = q->queue[i]; | |
5605 | if (check_pair_status(p)) | |
5606 | diff_flush_patch(p, options); | |
5607 | if (options->found_changes) | |
5608 | break; | |
5609 | } | |
5610 | } | |
5611 | ||
5612 | if (output_format & DIFF_FORMAT_PATCH) { | |
5613 | if (separator) { | |
5614 | emit_diff_symbol(options, DIFF_SYMBOL_SEPARATOR, NULL, 0, 0); | |
5615 | if (options->stat_sep) | |
5616 | /* attach patch instead of inline */ | |
5617 | emit_diff_symbol(options, DIFF_SYMBOL_STAT_SEP, | |
5618 | NULL, 0, 0); | |
5619 | } | |
5620 | ||
5621 | diff_flush_patch_all_file_pairs(options); | |
5622 | } | |
5623 | ||
5624 | if (output_format & DIFF_FORMAT_CALLBACK) | |
5625 | options->format_callback(q, options, options->format_callback_data); | |
5626 | ||
5627 | for (i = 0; i < q->nr; i++) | |
5628 | diff_free_filepair(q->queue[i]); | |
5629 | free_queue: | |
5630 | free(q->queue); | |
5631 | DIFF_QUEUE_CLEAR(q); | |
5632 | if (options->close_file) | |
5633 | fclose(options->file); | |
5634 | ||
5635 | /* | |
5636 | * Report the content-level differences with HAS_CHANGES; | |
5637 | * diff_addremove/diff_change does not set the bit when | |
5638 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
5639 | */ | |
5640 | if (options->flags.diff_from_contents) { | |
5641 | if (options->found_changes) | |
5642 | options->flags.has_changes = 1; | |
5643 | else | |
5644 | options->flags.has_changes = 0; | |
5645 | } | |
5646 | } | |
5647 | ||
5648 | static int match_filter(const struct diff_options *options, const struct diff_filepair *p) | |
5649 | { | |
5650 | return (((p->status == DIFF_STATUS_MODIFIED) && | |
5651 | ((p->score && | |
5652 | filter_bit_tst(DIFF_STATUS_FILTER_BROKEN, options)) || | |
5653 | (!p->score && | |
5654 | filter_bit_tst(DIFF_STATUS_MODIFIED, options)))) || | |
5655 | ((p->status != DIFF_STATUS_MODIFIED) && | |
5656 | filter_bit_tst(p->status, options))); | |
5657 | } | |
5658 | ||
5659 | static void diffcore_apply_filter(struct diff_options *options) | |
5660 | { | |
5661 | int i; | |
5662 | struct diff_queue_struct *q = &diff_queued_diff; | |
5663 | struct diff_queue_struct outq; | |
5664 | ||
5665 | DIFF_QUEUE_CLEAR(&outq); | |
5666 | ||
5667 | if (!options->filter) | |
5668 | return; | |
5669 | ||
5670 | if (filter_bit_tst(DIFF_STATUS_FILTER_AON, options)) { | |
5671 | int found; | |
5672 | for (i = found = 0; !found && i < q->nr; i++) { | |
5673 | if (match_filter(options, q->queue[i])) | |
5674 | found++; | |
5675 | } | |
5676 | if (found) | |
5677 | return; | |
5678 | ||
5679 | /* otherwise we will clear the whole queue | |
5680 | * by copying the empty outq at the end of this | |
5681 | * function, but first clear the current entries | |
5682 | * in the queue. | |
5683 | */ | |
5684 | for (i = 0; i < q->nr; i++) | |
5685 | diff_free_filepair(q->queue[i]); | |
5686 | } | |
5687 | else { | |
5688 | /* Only the matching ones */ | |
5689 | for (i = 0; i < q->nr; i++) { | |
5690 | struct diff_filepair *p = q->queue[i]; | |
5691 | if (match_filter(options, p)) | |
5692 | diff_q(&outq, p); | |
5693 | else | |
5694 | diff_free_filepair(p); | |
5695 | } | |
5696 | } | |
5697 | free(q->queue); | |
5698 | *q = outq; | |
5699 | } | |
5700 | ||
5701 | /* Check whether two filespecs with the same mode and size are identical */ | |
5702 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
5703 | struct diff_filespec *two) | |
5704 | { | |
5705 | if (S_ISGITLINK(one->mode)) | |
5706 | return 0; | |
5707 | if (diff_populate_filespec(one, 0)) | |
5708 | return 0; | |
5709 | if (diff_populate_filespec(two, 0)) | |
5710 | return 0; | |
5711 | return !memcmp(one->data, two->data, one->size); | |
5712 | } | |
5713 | ||
5714 | static int diff_filespec_check_stat_unmatch(struct diff_filepair *p) | |
5715 | { | |
5716 | if (p->done_skip_stat_unmatch) | |
5717 | return p->skip_stat_unmatch_result; | |
5718 | ||
5719 | p->done_skip_stat_unmatch = 1; | |
5720 | p->skip_stat_unmatch_result = 0; | |
5721 | /* | |
5722 | * 1. Entries that come from stat info dirtiness | |
5723 | * always have both sides (iow, not create/delete), | |
5724 | * one side of the object name is unknown, with | |
5725 | * the same mode and size. Keep the ones that | |
5726 | * do not match these criteria. They have real | |
5727 | * differences. | |
5728 | * | |
5729 | * 2. At this point, the file is known to be modified, | |
5730 | * with the same mode and size, and the object | |
5731 | * name of one side is unknown. Need to inspect | |
5732 | * the identical contents. | |
5733 | */ | |
5734 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
5735 | !DIFF_FILE_VALID(p->two) || | |
5736 | (p->one->oid_valid && p->two->oid_valid) || | |
5737 | (p->one->mode != p->two->mode) || | |
5738 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY) || | |
5739 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY) || | |
5740 | (p->one->size != p->two->size) || | |
5741 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ | |
5742 | p->skip_stat_unmatch_result = 1; | |
5743 | return p->skip_stat_unmatch_result; | |
5744 | } | |
5745 | ||
5746 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) | |
5747 | { | |
5748 | int i; | |
5749 | struct diff_queue_struct *q = &diff_queued_diff; | |
5750 | struct diff_queue_struct outq; | |
5751 | DIFF_QUEUE_CLEAR(&outq); | |
5752 | ||
5753 | for (i = 0; i < q->nr; i++) { | |
5754 | struct diff_filepair *p = q->queue[i]; | |
5755 | ||
5756 | if (diff_filespec_check_stat_unmatch(p)) | |
5757 | diff_q(&outq, p); | |
5758 | else { | |
5759 | /* | |
5760 | * The caller can subtract 1 from skip_stat_unmatch | |
5761 | * to determine how many paths were dirty only | |
5762 | * due to stat info mismatch. | |
5763 | */ | |
5764 | if (!diffopt->flags.no_index) | |
5765 | diffopt->skip_stat_unmatch++; | |
5766 | diff_free_filepair(p); | |
5767 | } | |
5768 | } | |
5769 | free(q->queue); | |
5770 | *q = outq; | |
5771 | } | |
5772 | ||
5773 | static int diffnamecmp(const void *a_, const void *b_) | |
5774 | { | |
5775 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
5776 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
5777 | const char *name_a, *name_b; | |
5778 | ||
5779 | name_a = a->one ? a->one->path : a->two->path; | |
5780 | name_b = b->one ? b->one->path : b->two->path; | |
5781 | return strcmp(name_a, name_b); | |
5782 | } | |
5783 | ||
5784 | void diffcore_fix_diff_index(struct diff_options *options) | |
5785 | { | |
5786 | struct diff_queue_struct *q = &diff_queued_diff; | |
5787 | QSORT(q->queue, q->nr, diffnamecmp); | |
5788 | } | |
5789 | ||
5790 | void diffcore_std(struct diff_options *options) | |
5791 | { | |
5792 | /* NOTE please keep the following in sync with diff_tree_combined() */ | |
5793 | if (options->skip_stat_unmatch) | |
5794 | diffcore_skip_stat_unmatch(options); | |
5795 | if (!options->found_follow) { | |
5796 | /* See try_to_follow_renames() in tree-diff.c */ | |
5797 | if (options->break_opt != -1) | |
5798 | diffcore_break(options->break_opt); | |
5799 | if (options->detect_rename) | |
5800 | diffcore_rename(options); | |
5801 | if (options->break_opt != -1) | |
5802 | diffcore_merge_broken(); | |
5803 | } | |
5804 | if (options->pickaxe_opts & DIFF_PICKAXE_KINDS_MASK) | |
5805 | diffcore_pickaxe(options); | |
5806 | if (options->orderfile) | |
5807 | diffcore_order(options->orderfile); | |
5808 | if (!options->found_follow) | |
5809 | /* See try_to_follow_renames() in tree-diff.c */ | |
5810 | diff_resolve_rename_copy(); | |
5811 | diffcore_apply_filter(options); | |
5812 | ||
5813 | if (diff_queued_diff.nr && !options->flags.diff_from_contents) | |
5814 | options->flags.has_changes = 1; | |
5815 | else | |
5816 | options->flags.has_changes = 0; | |
5817 | ||
5818 | options->found_follow = 0; | |
5819 | } | |
5820 | ||
5821 | int diff_result_code(struct diff_options *opt, int status) | |
5822 | { | |
5823 | int result = 0; | |
5824 | ||
5825 | diff_warn_rename_limit("diff.renameLimit", | |
5826 | opt->needed_rename_limit, | |
5827 | opt->degraded_cc_to_c); | |
5828 | if (!opt->flags.exit_with_status && | |
5829 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
5830 | return status; | |
5831 | if (opt->flags.exit_with_status && | |
5832 | opt->flags.has_changes) | |
5833 | result |= 01; | |
5834 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
5835 | opt->flags.check_failed) | |
5836 | result |= 02; | |
5837 | return result; | |
5838 | } | |
5839 | ||
5840 | int diff_can_quit_early(struct diff_options *opt) | |
5841 | { | |
5842 | return (opt->flags.quick && | |
5843 | !opt->filter && | |
5844 | opt->flags.has_changes); | |
5845 | } | |
5846 | ||
5847 | /* | |
5848 | * Shall changes to this submodule be ignored? | |
5849 | * | |
5850 | * Submodule changes can be configured to be ignored separately for each path, | |
5851 | * but that configuration can be overridden from the command line. | |
5852 | */ | |
5853 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
5854 | { | |
5855 | int ignored = 0; | |
5856 | struct diff_flags orig_flags = options->flags; | |
5857 | if (!options->flags.override_submodule_config) | |
5858 | set_diffopt_flags_from_submodule_config(options, path); | |
5859 | if (options->flags.ignore_submodules) | |
5860 | ignored = 1; | |
5861 | options->flags = orig_flags; | |
5862 | return ignored; | |
5863 | } | |
5864 | ||
5865 | void diff_addremove(struct diff_options *options, | |
5866 | int addremove, unsigned mode, | |
5867 | const struct object_id *oid, | |
5868 | int oid_valid, | |
5869 | const char *concatpath, unsigned dirty_submodule) | |
5870 | { | |
5871 | struct diff_filespec *one, *two; | |
5872 | ||
5873 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) | |
5874 | return; | |
5875 | ||
5876 | /* This may look odd, but it is a preparation for | |
5877 | * feeding "there are unchanged files which should | |
5878 | * not produce diffs, but when you are doing copy | |
5879 | * detection you would need them, so here they are" | |
5880 | * entries to the diff-core. They will be prefixed | |
5881 | * with something like '=' or '*' (I haven't decided | |
5882 | * which but should not make any difference). | |
5883 | * Feeding the same new and old to diff_change() | |
5884 | * also has the same effect. | |
5885 | * Before the final output happens, they are pruned after | |
5886 | * merged into rename/copy pairs as appropriate. | |
5887 | */ | |
5888 | if (options->flags.reverse_diff) | |
5889 | addremove = (addremove == '+' ? '-' : | |
5890 | addremove == '-' ? '+' : addremove); | |
5891 | ||
5892 | if (options->prefix && | |
5893 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
5894 | return; | |
5895 | ||
5896 | one = alloc_filespec(concatpath); | |
5897 | two = alloc_filespec(concatpath); | |
5898 | ||
5899 | if (addremove != '+') | |
5900 | fill_filespec(one, oid, oid_valid, mode); | |
5901 | if (addremove != '-') { | |
5902 | fill_filespec(two, oid, oid_valid, mode); | |
5903 | two->dirty_submodule = dirty_submodule; | |
5904 | } | |
5905 | ||
5906 | diff_queue(&diff_queued_diff, one, two); | |
5907 | if (!options->flags.diff_from_contents) | |
5908 | options->flags.has_changes = 1; | |
5909 | } | |
5910 | ||
5911 | void diff_change(struct diff_options *options, | |
5912 | unsigned old_mode, unsigned new_mode, | |
5913 | const struct object_id *old_oid, | |
5914 | const struct object_id *new_oid, | |
5915 | int old_oid_valid, int new_oid_valid, | |
5916 | const char *concatpath, | |
5917 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
5918 | { | |
5919 | struct diff_filespec *one, *two; | |
5920 | struct diff_filepair *p; | |
5921 | ||
5922 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && | |
5923 | is_submodule_ignored(concatpath, options)) | |
5924 | return; | |
5925 | ||
5926 | if (options->flags.reverse_diff) { | |
5927 | SWAP(old_mode, new_mode); | |
5928 | SWAP(old_oid, new_oid); | |
5929 | SWAP(old_oid_valid, new_oid_valid); | |
5930 | SWAP(old_dirty_submodule, new_dirty_submodule); | |
5931 | } | |
5932 | ||
5933 | if (options->prefix && | |
5934 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
5935 | return; | |
5936 | ||
5937 | one = alloc_filespec(concatpath); | |
5938 | two = alloc_filespec(concatpath); | |
5939 | fill_filespec(one, old_oid, old_oid_valid, old_mode); | |
5940 | fill_filespec(two, new_oid, new_oid_valid, new_mode); | |
5941 | one->dirty_submodule = old_dirty_submodule; | |
5942 | two->dirty_submodule = new_dirty_submodule; | |
5943 | p = diff_queue(&diff_queued_diff, one, two); | |
5944 | ||
5945 | if (options->flags.diff_from_contents) | |
5946 | return; | |
5947 | ||
5948 | if (options->flags.quick && options->skip_stat_unmatch && | |
5949 | !diff_filespec_check_stat_unmatch(p)) | |
5950 | return; | |
5951 | ||
5952 | options->flags.has_changes = 1; | |
5953 | } | |
5954 | ||
5955 | struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) | |
5956 | { | |
5957 | struct diff_filepair *pair; | |
5958 | struct diff_filespec *one, *two; | |
5959 | ||
5960 | if (options->prefix && | |
5961 | strncmp(path, options->prefix, options->prefix_length)) | |
5962 | return NULL; | |
5963 | ||
5964 | one = alloc_filespec(path); | |
5965 | two = alloc_filespec(path); | |
5966 | pair = diff_queue(&diff_queued_diff, one, two); | |
5967 | pair->is_unmerged = 1; | |
5968 | return pair; | |
5969 | } | |
5970 | ||
5971 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
5972 | size_t *outsize) | |
5973 | { | |
5974 | struct diff_tempfile *temp; | |
5975 | const char *argv[3]; | |
5976 | const char **arg = argv; | |
5977 | struct child_process child = CHILD_PROCESS_INIT; | |
5978 | struct strbuf buf = STRBUF_INIT; | |
5979 | int err = 0; | |
5980 | ||
5981 | temp = prepare_temp_file(spec->path, spec); | |
5982 | *arg++ = pgm; | |
5983 | *arg++ = temp->name; | |
5984 | *arg = NULL; | |
5985 | ||
5986 | child.use_shell = 1; | |
5987 | child.argv = argv; | |
5988 | child.out = -1; | |
5989 | if (start_command(&child)) { | |
5990 | remove_tempfile(); | |
5991 | return NULL; | |
5992 | } | |
5993 | ||
5994 | if (strbuf_read(&buf, child.out, 0) < 0) | |
5995 | err = error("error reading from textconv command '%s'", pgm); | |
5996 | close(child.out); | |
5997 | ||
5998 | if (finish_command(&child) || err) { | |
5999 | strbuf_release(&buf); | |
6000 | remove_tempfile(); | |
6001 | return NULL; | |
6002 | } | |
6003 | remove_tempfile(); | |
6004 | ||
6005 | return strbuf_detach(&buf, outsize); | |
6006 | } | |
6007 | ||
6008 | size_t fill_textconv(struct userdiff_driver *driver, | |
6009 | struct diff_filespec *df, | |
6010 | char **outbuf) | |
6011 | { | |
6012 | size_t size; | |
6013 | ||
6014 | if (!driver) { | |
6015 | if (!DIFF_FILE_VALID(df)) { | |
6016 | *outbuf = ""; | |
6017 | return 0; | |
6018 | } | |
6019 | if (diff_populate_filespec(df, 0)) | |
6020 | die("unable to read files to diff"); | |
6021 | *outbuf = df->data; | |
6022 | return df->size; | |
6023 | } | |
6024 | ||
6025 | if (!driver->textconv) | |
6026 | die("BUG: fill_textconv called with non-textconv driver"); | |
6027 | ||
6028 | if (driver->textconv_cache && df->oid_valid) { | |
6029 | *outbuf = notes_cache_get(driver->textconv_cache, | |
6030 | &df->oid, | |
6031 | &size); | |
6032 | if (*outbuf) | |
6033 | return size; | |
6034 | } | |
6035 | ||
6036 | *outbuf = run_textconv(driver->textconv, df, &size); | |
6037 | if (!*outbuf) | |
6038 | die("unable to read files to diff"); | |
6039 | ||
6040 | if (driver->textconv_cache && df->oid_valid) { | |
6041 | /* ignore errors, as we might be in a readonly repository */ | |
6042 | notes_cache_put(driver->textconv_cache, &df->oid, *outbuf, | |
6043 | size); | |
6044 | /* | |
6045 | * we could save up changes and flush them all at the end, | |
6046 | * but we would need an extra call after all diffing is done. | |
6047 | * Since generating a cache entry is the slow path anyway, | |
6048 | * this extra overhead probably isn't a big deal. | |
6049 | */ | |
6050 | notes_cache_write(driver->textconv_cache); | |
6051 | } | |
6052 | ||
6053 | return size; | |
6054 | } | |
6055 | ||
6056 | int textconv_object(const char *path, | |
6057 | unsigned mode, | |
6058 | const struct object_id *oid, | |
6059 | int oid_valid, | |
6060 | char **buf, | |
6061 | unsigned long *buf_size) | |
6062 | { | |
6063 | struct diff_filespec *df; | |
6064 | struct userdiff_driver *textconv; | |
6065 | ||
6066 | df = alloc_filespec(path); | |
6067 | fill_filespec(df, oid, oid_valid, mode); | |
6068 | textconv = get_textconv(df); | |
6069 | if (!textconv) { | |
6070 | free_filespec(df); | |
6071 | return 0; | |
6072 | } | |
6073 | ||
6074 | *buf_size = fill_textconv(textconv, df, buf); | |
6075 | free_filespec(df); | |
6076 | return 1; | |
6077 | } | |
6078 | ||
6079 | void setup_diff_pager(struct diff_options *opt) | |
6080 | { | |
6081 | /* | |
6082 | * If the user asked for our exit code, then either they want --quiet | |
6083 | * or --exit-code. We should definitely not bother with a pager in the | |
6084 | * former case, as we will generate no output. Since we still properly | |
6085 | * report our exit code even when a pager is run, we _could_ run a | |
6086 | * pager with --exit-code. But since we have not done so historically, | |
6087 | * and because it is easy to find people oneline advising "git diff | |
6088 | * --exit-code" in hooks and other scripts, we do not do so. | |
6089 | */ | |
6090 | if (!opt->flags.exit_with_status && | |
6091 | check_pager_config("diff") != 0) | |
6092 | setup_pager(); | |
6093 | } |