]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
4 | #include "cache.h" | |
5 | #include "quote.h" | |
6 | #include "diff.h" | |
7 | #include "diffcore.h" | |
8 | #include "delta.h" | |
9 | #include "xdiff-interface.h" | |
10 | #include "color.h" | |
11 | #include "attr.h" | |
12 | #include "run-command.h" | |
13 | #include "utf8.h" | |
14 | #include "userdiff.h" | |
15 | #include "sigchain.h" | |
16 | #include "submodule.h" | |
17 | #include "ll-merge.h" | |
18 | #include "string-list.h" | |
19 | #include "argv-array.h" | |
20 | ||
21 | #ifdef NO_FAST_WORKING_DIRECTORY | |
22 | #define FAST_WORKING_DIRECTORY 0 | |
23 | #else | |
24 | #define FAST_WORKING_DIRECTORY 1 | |
25 | #endif | |
26 | ||
27 | static int diff_detect_rename_default; | |
28 | static int diff_rename_limit_default = 400; | |
29 | static int diff_suppress_blank_empty; | |
30 | static int diff_use_color_default = -1; | |
31 | static int diff_context_default = 3; | |
32 | static const char *diff_word_regex_cfg; | |
33 | static const char *external_diff_cmd_cfg; | |
34 | static const char *diff_order_file_cfg; | |
35 | int diff_auto_refresh_index = 1; | |
36 | static int diff_mnemonic_prefix; | |
37 | static int diff_no_prefix; | |
38 | static int diff_stat_graph_width; | |
39 | static int diff_dirstat_permille_default = 30; | |
40 | static struct diff_options default_diff_options; | |
41 | static long diff_algorithm; | |
42 | ||
43 | static char diff_colors[][COLOR_MAXLEN] = { | |
44 | GIT_COLOR_RESET, | |
45 | GIT_COLOR_NORMAL, /* PLAIN */ | |
46 | GIT_COLOR_BOLD, /* METAINFO */ | |
47 | GIT_COLOR_CYAN, /* FRAGINFO */ | |
48 | GIT_COLOR_RED, /* OLD */ | |
49 | GIT_COLOR_GREEN, /* NEW */ | |
50 | GIT_COLOR_YELLOW, /* COMMIT */ | |
51 | GIT_COLOR_BG_RED, /* WHITESPACE */ | |
52 | GIT_COLOR_NORMAL, /* FUNCINFO */ | |
53 | }; | |
54 | ||
55 | static int parse_diff_color_slot(const char *var) | |
56 | { | |
57 | if (!strcasecmp(var, "plain")) | |
58 | return DIFF_PLAIN; | |
59 | if (!strcasecmp(var, "meta")) | |
60 | return DIFF_METAINFO; | |
61 | if (!strcasecmp(var, "frag")) | |
62 | return DIFF_FRAGINFO; | |
63 | if (!strcasecmp(var, "old")) | |
64 | return DIFF_FILE_OLD; | |
65 | if (!strcasecmp(var, "new")) | |
66 | return DIFF_FILE_NEW; | |
67 | if (!strcasecmp(var, "commit")) | |
68 | return DIFF_COMMIT; | |
69 | if (!strcasecmp(var, "whitespace")) | |
70 | return DIFF_WHITESPACE; | |
71 | if (!strcasecmp(var, "func")) | |
72 | return DIFF_FUNCINFO; | |
73 | return -1; | |
74 | } | |
75 | ||
76 | static int parse_dirstat_params(struct diff_options *options, const char *params_string, | |
77 | struct strbuf *errmsg) | |
78 | { | |
79 | char *params_copy = xstrdup(params_string); | |
80 | struct string_list params = STRING_LIST_INIT_NODUP; | |
81 | int ret = 0; | |
82 | int i; | |
83 | ||
84 | if (*params_copy) | |
85 | string_list_split_in_place(¶ms, params_copy, ',', -1); | |
86 | for (i = 0; i < params.nr; i++) { | |
87 | const char *p = params.items[i].string; | |
88 | if (!strcmp(p, "changes")) { | |
89 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); | |
90 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); | |
91 | } else if (!strcmp(p, "lines")) { | |
92 | DIFF_OPT_SET(options, DIRSTAT_BY_LINE); | |
93 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); | |
94 | } else if (!strcmp(p, "files")) { | |
95 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); | |
96 | DIFF_OPT_SET(options, DIRSTAT_BY_FILE); | |
97 | } else if (!strcmp(p, "noncumulative")) { | |
98 | DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); | |
99 | } else if (!strcmp(p, "cumulative")) { | |
100 | DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); | |
101 | } else if (isdigit(*p)) { | |
102 | char *end; | |
103 | int permille = strtoul(p, &end, 10) * 10; | |
104 | if (*end == '.' && isdigit(*++end)) { | |
105 | /* only use first digit */ | |
106 | permille += *end - '0'; | |
107 | /* .. and ignore any further digits */ | |
108 | while (isdigit(*++end)) | |
109 | ; /* nothing */ | |
110 | } | |
111 | if (!*end) | |
112 | options->dirstat_permille = permille; | |
113 | else { | |
114 | strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%s'\n"), | |
115 | p); | |
116 | ret++; | |
117 | } | |
118 | } else { | |
119 | strbuf_addf(errmsg, _(" Unknown dirstat parameter '%s'\n"), p); | |
120 | ret++; | |
121 | } | |
122 | ||
123 | } | |
124 | string_list_clear(¶ms, 0); | |
125 | free(params_copy); | |
126 | return ret; | |
127 | } | |
128 | ||
129 | static int parse_submodule_params(struct diff_options *options, const char *value) | |
130 | { | |
131 | if (!strcmp(value, "log")) | |
132 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
133 | else if (!strcmp(value, "short")) | |
134 | DIFF_OPT_CLR(options, SUBMODULE_LOG); | |
135 | else | |
136 | return -1; | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static int git_config_rename(const char *var, const char *value) | |
141 | { | |
142 | if (!value) | |
143 | return DIFF_DETECT_RENAME; | |
144 | if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) | |
145 | return DIFF_DETECT_COPY; | |
146 | return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; | |
147 | } | |
148 | ||
149 | long parse_algorithm_value(const char *value) | |
150 | { | |
151 | if (!value) | |
152 | return -1; | |
153 | else if (!strcasecmp(value, "myers") || !strcasecmp(value, "default")) | |
154 | return 0; | |
155 | else if (!strcasecmp(value, "minimal")) | |
156 | return XDF_NEED_MINIMAL; | |
157 | else if (!strcasecmp(value, "patience")) | |
158 | return XDF_PATIENCE_DIFF; | |
159 | else if (!strcasecmp(value, "histogram")) | |
160 | return XDF_HISTOGRAM_DIFF; | |
161 | return -1; | |
162 | } | |
163 | ||
164 | /* | |
165 | * These are to give UI layer defaults. | |
166 | * The core-level commands such as git-diff-files should | |
167 | * never be affected by the setting of diff.renames | |
168 | * the user happens to have in the configuration file. | |
169 | */ | |
170 | int git_diff_ui_config(const char *var, const char *value, void *cb) | |
171 | { | |
172 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { | |
173 | diff_use_color_default = git_config_colorbool(var, value); | |
174 | return 0; | |
175 | } | |
176 | if (!strcmp(var, "diff.context")) { | |
177 | diff_context_default = git_config_int(var, value); | |
178 | if (diff_context_default < 0) | |
179 | return -1; | |
180 | return 0; | |
181 | } | |
182 | if (!strcmp(var, "diff.renames")) { | |
183 | diff_detect_rename_default = git_config_rename(var, value); | |
184 | return 0; | |
185 | } | |
186 | if (!strcmp(var, "diff.autorefreshindex")) { | |
187 | diff_auto_refresh_index = git_config_bool(var, value); | |
188 | return 0; | |
189 | } | |
190 | if (!strcmp(var, "diff.mnemonicprefix")) { | |
191 | diff_mnemonic_prefix = git_config_bool(var, value); | |
192 | return 0; | |
193 | } | |
194 | if (!strcmp(var, "diff.noprefix")) { | |
195 | diff_no_prefix = git_config_bool(var, value); | |
196 | return 0; | |
197 | } | |
198 | if (!strcmp(var, "diff.statgraphwidth")) { | |
199 | diff_stat_graph_width = git_config_int(var, value); | |
200 | return 0; | |
201 | } | |
202 | if (!strcmp(var, "diff.external")) | |
203 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
204 | if (!strcmp(var, "diff.wordregex")) | |
205 | return git_config_string(&diff_word_regex_cfg, var, value); | |
206 | if (!strcmp(var, "diff.orderfile")) | |
207 | return git_config_pathname(&diff_order_file_cfg, var, value); | |
208 | ||
209 | if (!strcmp(var, "diff.ignoresubmodules")) | |
210 | handle_ignore_submodules_arg(&default_diff_options, value); | |
211 | ||
212 | if (!strcmp(var, "diff.submodule")) { | |
213 | if (parse_submodule_params(&default_diff_options, value)) | |
214 | warning(_("Unknown value for 'diff.submodule' config variable: '%s'"), | |
215 | value); | |
216 | return 0; | |
217 | } | |
218 | ||
219 | if (!strcmp(var, "diff.algorithm")) { | |
220 | diff_algorithm = parse_algorithm_value(value); | |
221 | if (diff_algorithm < 0) | |
222 | return -1; | |
223 | return 0; | |
224 | } | |
225 | ||
226 | if (git_color_config(var, value, cb) < 0) | |
227 | return -1; | |
228 | ||
229 | return git_diff_basic_config(var, value, cb); | |
230 | } | |
231 | ||
232 | int git_diff_basic_config(const char *var, const char *value, void *cb) | |
233 | { | |
234 | const char *name; | |
235 | ||
236 | if (!strcmp(var, "diff.renamelimit")) { | |
237 | diff_rename_limit_default = git_config_int(var, value); | |
238 | return 0; | |
239 | } | |
240 | ||
241 | if (userdiff_config(var, value) < 0) | |
242 | return -1; | |
243 | ||
244 | if (skip_prefix(var, "diff.color.", &name) || | |
245 | skip_prefix(var, "color.diff.", &name)) { | |
246 | int slot = parse_diff_color_slot(name); | |
247 | if (slot < 0) | |
248 | return 0; | |
249 | if (!value) | |
250 | return config_error_nonbool(var); | |
251 | return color_parse(value, diff_colors[slot]); | |
252 | } | |
253 | ||
254 | /* like GNU diff's --suppress-blank-empty option */ | |
255 | if (!strcmp(var, "diff.suppressblankempty") || | |
256 | /* for backwards compatibility */ | |
257 | !strcmp(var, "diff.suppress-blank-empty")) { | |
258 | diff_suppress_blank_empty = git_config_bool(var, value); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | if (!strcmp(var, "diff.dirstat")) { | |
263 | struct strbuf errmsg = STRBUF_INIT; | |
264 | default_diff_options.dirstat_permille = diff_dirstat_permille_default; | |
265 | if (parse_dirstat_params(&default_diff_options, value, &errmsg)) | |
266 | warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), | |
267 | errmsg.buf); | |
268 | strbuf_release(&errmsg); | |
269 | diff_dirstat_permille_default = default_diff_options.dirstat_permille; | |
270 | return 0; | |
271 | } | |
272 | ||
273 | if (starts_with(var, "submodule.")) | |
274 | return parse_submodule_config_option(var, value); | |
275 | ||
276 | return git_default_config(var, value, cb); | |
277 | } | |
278 | ||
279 | static char *quote_two(const char *one, const char *two) | |
280 | { | |
281 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
282 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
283 | struct strbuf res = STRBUF_INIT; | |
284 | ||
285 | if (need_one + need_two) { | |
286 | strbuf_addch(&res, '"'); | |
287 | quote_c_style(one, &res, NULL, 1); | |
288 | quote_c_style(two, &res, NULL, 1); | |
289 | strbuf_addch(&res, '"'); | |
290 | } else { | |
291 | strbuf_addstr(&res, one); | |
292 | strbuf_addstr(&res, two); | |
293 | } | |
294 | return strbuf_detach(&res, NULL); | |
295 | } | |
296 | ||
297 | static const char *external_diff(void) | |
298 | { | |
299 | static const char *external_diff_cmd = NULL; | |
300 | static int done_preparing = 0; | |
301 | ||
302 | if (done_preparing) | |
303 | return external_diff_cmd; | |
304 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
305 | if (!external_diff_cmd) | |
306 | external_diff_cmd = external_diff_cmd_cfg; | |
307 | done_preparing = 1; | |
308 | return external_diff_cmd; | |
309 | } | |
310 | ||
311 | static struct diff_tempfile { | |
312 | const char *name; /* filename external diff should read from */ | |
313 | char hex[41]; | |
314 | char mode[10]; | |
315 | char tmp_path[PATH_MAX]; | |
316 | } diff_temp[2]; | |
317 | ||
318 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); | |
319 | ||
320 | struct emit_callback { | |
321 | int color_diff; | |
322 | unsigned ws_rule; | |
323 | int blank_at_eof_in_preimage; | |
324 | int blank_at_eof_in_postimage; | |
325 | int lno_in_preimage; | |
326 | int lno_in_postimage; | |
327 | sane_truncate_fn truncate; | |
328 | const char **label_path; | |
329 | struct diff_words_data *diff_words; | |
330 | struct diff_options *opt; | |
331 | int *found_changesp; | |
332 | struct strbuf *header; | |
333 | }; | |
334 | ||
335 | static int count_lines(const char *data, int size) | |
336 | { | |
337 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
338 | count = 0; | |
339 | while (0 < size--) { | |
340 | ch = *data++; | |
341 | if (ch == '\n') { | |
342 | count++; | |
343 | nl_just_seen = 1; | |
344 | completely_empty = 0; | |
345 | } | |
346 | else { | |
347 | nl_just_seen = 0; | |
348 | completely_empty = 0; | |
349 | } | |
350 | } | |
351 | if (completely_empty) | |
352 | return 0; | |
353 | if (!nl_just_seen) | |
354 | count++; /* no trailing newline */ | |
355 | return count; | |
356 | } | |
357 | ||
358 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) | |
359 | { | |
360 | if (!DIFF_FILE_VALID(one)) { | |
361 | mf->ptr = (char *)""; /* does not matter */ | |
362 | mf->size = 0; | |
363 | return 0; | |
364 | } | |
365 | else if (diff_populate_filespec(one, 0)) | |
366 | return -1; | |
367 | ||
368 | mf->ptr = one->data; | |
369 | mf->size = one->size; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ | |
374 | static unsigned long diff_filespec_size(struct diff_filespec *one) | |
375 | { | |
376 | if (!DIFF_FILE_VALID(one)) | |
377 | return 0; | |
378 | diff_populate_filespec(one, CHECK_SIZE_ONLY); | |
379 | return one->size; | |
380 | } | |
381 | ||
382 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) | |
383 | { | |
384 | char *ptr = mf->ptr; | |
385 | long size = mf->size; | |
386 | int cnt = 0; | |
387 | ||
388 | if (!size) | |
389 | return cnt; | |
390 | ptr += size - 1; /* pointing at the very end */ | |
391 | if (*ptr != '\n') | |
392 | ; /* incomplete line */ | |
393 | else | |
394 | ptr--; /* skip the last LF */ | |
395 | while (mf->ptr < ptr) { | |
396 | char *prev_eol; | |
397 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
398 | if (*prev_eol == '\n') | |
399 | break; | |
400 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
401 | break; | |
402 | cnt++; | |
403 | ptr = prev_eol - 1; | |
404 | } | |
405 | return cnt; | |
406 | } | |
407 | ||
408 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
409 | struct emit_callback *ecbdata) | |
410 | { | |
411 | int l1, l2, at; | |
412 | unsigned ws_rule = ecbdata->ws_rule; | |
413 | l1 = count_trailing_blank(mf1, ws_rule); | |
414 | l2 = count_trailing_blank(mf2, ws_rule); | |
415 | if (l2 <= l1) { | |
416 | ecbdata->blank_at_eof_in_preimage = 0; | |
417 | ecbdata->blank_at_eof_in_postimage = 0; | |
418 | return; | |
419 | } | |
420 | at = count_lines(mf1->ptr, mf1->size); | |
421 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
422 | ||
423 | at = count_lines(mf2->ptr, mf2->size); | |
424 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
425 | } | |
426 | ||
427 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, | |
428 | int first, const char *line, int len) | |
429 | { | |
430 | int has_trailing_newline, has_trailing_carriage_return; | |
431 | int nofirst; | |
432 | FILE *file = o->file; | |
433 | ||
434 | fputs(diff_line_prefix(o), file); | |
435 | ||
436 | if (len == 0) { | |
437 | has_trailing_newline = (first == '\n'); | |
438 | has_trailing_carriage_return = (!has_trailing_newline && | |
439 | (first == '\r')); | |
440 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
441 | } else { | |
442 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
443 | if (has_trailing_newline) | |
444 | len--; | |
445 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
446 | if (has_trailing_carriage_return) | |
447 | len--; | |
448 | nofirst = 0; | |
449 | } | |
450 | ||
451 | if (len || !nofirst) { | |
452 | fputs(set, file); | |
453 | if (!nofirst) | |
454 | fputc(first, file); | |
455 | fwrite(line, len, 1, file); | |
456 | fputs(reset, file); | |
457 | } | |
458 | if (has_trailing_carriage_return) | |
459 | fputc('\r', file); | |
460 | if (has_trailing_newline) | |
461 | fputc('\n', file); | |
462 | } | |
463 | ||
464 | static void emit_line(struct diff_options *o, const char *set, const char *reset, | |
465 | const char *line, int len) | |
466 | { | |
467 | emit_line_0(o, set, reset, line[0], line+1, len-1); | |
468 | } | |
469 | ||
470 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) | |
471 | { | |
472 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
473 | ecbdata->blank_at_eof_in_preimage && | |
474 | ecbdata->blank_at_eof_in_postimage && | |
475 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
476 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
477 | return 0; | |
478 | return ws_blank_line(line, len, ecbdata->ws_rule); | |
479 | } | |
480 | ||
481 | static void emit_add_line(const char *reset, | |
482 | struct emit_callback *ecbdata, | |
483 | const char *line, int len) | |
484 | { | |
485 | const char *ws = diff_get_color(ecbdata->color_diff, DIFF_WHITESPACE); | |
486 | const char *set = diff_get_color(ecbdata->color_diff, DIFF_FILE_NEW); | |
487 | ||
488 | if (!*ws) | |
489 | emit_line_0(ecbdata->opt, set, reset, '+', line, len); | |
490 | else if (new_blank_line_at_eof(ecbdata, line, len)) | |
491 | /* Blank line at EOF - paint '+' as well */ | |
492 | emit_line_0(ecbdata->opt, ws, reset, '+', line, len); | |
493 | else { | |
494 | /* Emit just the prefix, then the rest. */ | |
495 | emit_line_0(ecbdata->opt, set, reset, '+', "", 0); | |
496 | ws_check_emit(line, len, ecbdata->ws_rule, | |
497 | ecbdata->opt->file, set, reset, ws); | |
498 | } | |
499 | } | |
500 | ||
501 | static void emit_hunk_header(struct emit_callback *ecbdata, | |
502 | const char *line, int len) | |
503 | { | |
504 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
505 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); | |
506 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
507 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
508 | static const char atat[2] = { '@', '@' }; | |
509 | const char *cp, *ep; | |
510 | struct strbuf msgbuf = STRBUF_INIT; | |
511 | int org_len = len; | |
512 | int i = 1; | |
513 | ||
514 | /* | |
515 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
516 | * it always is at least 10 bytes long. | |
517 | */ | |
518 | if (len < 10 || | |
519 | memcmp(line, atat, 2) || | |
520 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
521 | emit_line(ecbdata->opt, plain, reset, line, len); | |
522 | return; | |
523 | } | |
524 | ep += 2; /* skip over @@ */ | |
525 | ||
526 | /* The hunk header in fraginfo color */ | |
527 | strbuf_addstr(&msgbuf, frag); | |
528 | strbuf_add(&msgbuf, line, ep - line); | |
529 | strbuf_addstr(&msgbuf, reset); | |
530 | ||
531 | /* | |
532 | * trailing "\r\n" | |
533 | */ | |
534 | for ( ; i < 3; i++) | |
535 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
536 | len--; | |
537 | ||
538 | /* blank before the func header */ | |
539 | for (cp = ep; ep - line < len; ep++) | |
540 | if (*ep != ' ' && *ep != '\t') | |
541 | break; | |
542 | if (ep != cp) { | |
543 | strbuf_addstr(&msgbuf, plain); | |
544 | strbuf_add(&msgbuf, cp, ep - cp); | |
545 | strbuf_addstr(&msgbuf, reset); | |
546 | } | |
547 | ||
548 | if (ep < line + len) { | |
549 | strbuf_addstr(&msgbuf, func); | |
550 | strbuf_add(&msgbuf, ep, line + len - ep); | |
551 | strbuf_addstr(&msgbuf, reset); | |
552 | } | |
553 | ||
554 | strbuf_add(&msgbuf, line + len, org_len - len); | |
555 | emit_line(ecbdata->opt, "", "", msgbuf.buf, msgbuf.len); | |
556 | strbuf_release(&msgbuf); | |
557 | } | |
558 | ||
559 | static struct diff_tempfile *claim_diff_tempfile(void) { | |
560 | int i; | |
561 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
562 | if (!diff_temp[i].name) | |
563 | return diff_temp + i; | |
564 | die("BUG: diff is failing to clean up its tempfiles"); | |
565 | } | |
566 | ||
567 | static int remove_tempfile_installed; | |
568 | ||
569 | static void remove_tempfile(void) | |
570 | { | |
571 | int i; | |
572 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { | |
573 | if (diff_temp[i].name == diff_temp[i].tmp_path) | |
574 | unlink_or_warn(diff_temp[i].name); | |
575 | diff_temp[i].name = NULL; | |
576 | } | |
577 | } | |
578 | ||
579 | static void remove_tempfile_on_signal(int signo) | |
580 | { | |
581 | remove_tempfile(); | |
582 | sigchain_pop(signo); | |
583 | raise(signo); | |
584 | } | |
585 | ||
586 | static void print_line_count(FILE *file, int count) | |
587 | { | |
588 | switch (count) { | |
589 | case 0: | |
590 | fprintf(file, "0,0"); | |
591 | break; | |
592 | case 1: | |
593 | fprintf(file, "1"); | |
594 | break; | |
595 | default: | |
596 | fprintf(file, "1,%d", count); | |
597 | break; | |
598 | } | |
599 | } | |
600 | ||
601 | static void emit_rewrite_lines(struct emit_callback *ecb, | |
602 | int prefix, const char *data, int size) | |
603 | { | |
604 | const char *endp = NULL; | |
605 | static const char *nneof = " No newline at end of file\n"; | |
606 | const char *old = diff_get_color(ecb->color_diff, DIFF_FILE_OLD); | |
607 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); | |
608 | ||
609 | while (0 < size) { | |
610 | int len; | |
611 | ||
612 | endp = memchr(data, '\n', size); | |
613 | len = endp ? (endp - data + 1) : size; | |
614 | if (prefix != '+') { | |
615 | ecb->lno_in_preimage++; | |
616 | emit_line_0(ecb->opt, old, reset, '-', | |
617 | data, len); | |
618 | } else { | |
619 | ecb->lno_in_postimage++; | |
620 | emit_add_line(reset, ecb, data, len); | |
621 | } | |
622 | size -= len; | |
623 | data += len; | |
624 | } | |
625 | if (!endp) { | |
626 | const char *plain = diff_get_color(ecb->color_diff, | |
627 | DIFF_PLAIN); | |
628 | putc('\n', ecb->opt->file); | |
629 | emit_line_0(ecb->opt, plain, reset, '\\', | |
630 | nneof, strlen(nneof)); | |
631 | } | |
632 | } | |
633 | ||
634 | static void emit_rewrite_diff(const char *name_a, | |
635 | const char *name_b, | |
636 | struct diff_filespec *one, | |
637 | struct diff_filespec *two, | |
638 | struct userdiff_driver *textconv_one, | |
639 | struct userdiff_driver *textconv_two, | |
640 | struct diff_options *o) | |
641 | { | |
642 | int lc_a, lc_b; | |
643 | const char *name_a_tab, *name_b_tab; | |
644 | const char *metainfo = diff_get_color(o->use_color, DIFF_METAINFO); | |
645 | const char *fraginfo = diff_get_color(o->use_color, DIFF_FRAGINFO); | |
646 | const char *reset = diff_get_color(o->use_color, DIFF_RESET); | |
647 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; | |
648 | const char *a_prefix, *b_prefix; | |
649 | char *data_one, *data_two; | |
650 | size_t size_one, size_two; | |
651 | struct emit_callback ecbdata; | |
652 | const char *line_prefix = diff_line_prefix(o); | |
653 | ||
654 | if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
655 | a_prefix = o->b_prefix; | |
656 | b_prefix = o->a_prefix; | |
657 | } else { | |
658 | a_prefix = o->a_prefix; | |
659 | b_prefix = o->b_prefix; | |
660 | } | |
661 | ||
662 | name_a += (*name_a == '/'); | |
663 | name_b += (*name_b == '/'); | |
664 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; | |
665 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
666 | ||
667 | strbuf_reset(&a_name); | |
668 | strbuf_reset(&b_name); | |
669 | quote_two_c_style(&a_name, a_prefix, name_a, 0); | |
670 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
671 | ||
672 | size_one = fill_textconv(textconv_one, one, &data_one); | |
673 | size_two = fill_textconv(textconv_two, two, &data_two); | |
674 | ||
675 | memset(&ecbdata, 0, sizeof(ecbdata)); | |
676 | ecbdata.color_diff = want_color(o->use_color); | |
677 | ecbdata.found_changesp = &o->found_changes; | |
678 | ecbdata.ws_rule = whitespace_rule(name_b); | |
679 | ecbdata.opt = o; | |
680 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { | |
681 | mmfile_t mf1, mf2; | |
682 | mf1.ptr = (char *)data_one; | |
683 | mf2.ptr = (char *)data_two; | |
684 | mf1.size = size_one; | |
685 | mf2.size = size_two; | |
686 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
687 | } | |
688 | ecbdata.lno_in_preimage = 1; | |
689 | ecbdata.lno_in_postimage = 1; | |
690 | ||
691 | lc_a = count_lines(data_one, size_one); | |
692 | lc_b = count_lines(data_two, size_two); | |
693 | fprintf(o->file, | |
694 | "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", | |
695 | line_prefix, metainfo, a_name.buf, name_a_tab, reset, | |
696 | line_prefix, metainfo, b_name.buf, name_b_tab, reset, | |
697 | line_prefix, fraginfo); | |
698 | if (!o->irreversible_delete) | |
699 | print_line_count(o->file, lc_a); | |
700 | else | |
701 | fprintf(o->file, "?,?"); | |
702 | fprintf(o->file, " +"); | |
703 | print_line_count(o->file, lc_b); | |
704 | fprintf(o->file, " @@%s\n", reset); | |
705 | if (lc_a && !o->irreversible_delete) | |
706 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); | |
707 | if (lc_b) | |
708 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); | |
709 | if (textconv_one) | |
710 | free((char *)data_one); | |
711 | if (textconv_two) | |
712 | free((char *)data_two); | |
713 | } | |
714 | ||
715 | struct diff_words_buffer { | |
716 | mmfile_t text; | |
717 | long alloc; | |
718 | struct diff_words_orig { | |
719 | const char *begin, *end; | |
720 | } *orig; | |
721 | int orig_nr, orig_alloc; | |
722 | }; | |
723 | ||
724 | static void diff_words_append(char *line, unsigned long len, | |
725 | struct diff_words_buffer *buffer) | |
726 | { | |
727 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); | |
728 | line++; | |
729 | len--; | |
730 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
731 | buffer->text.size += len; | |
732 | buffer->text.ptr[buffer->text.size] = '\0'; | |
733 | } | |
734 | ||
735 | struct diff_words_style_elem { | |
736 | const char *prefix; | |
737 | const char *suffix; | |
738 | const char *color; /* NULL; filled in by the setup code if | |
739 | * color is enabled */ | |
740 | }; | |
741 | ||
742 | struct diff_words_style { | |
743 | enum diff_words_type type; | |
744 | struct diff_words_style_elem new, old, ctx; | |
745 | const char *newline; | |
746 | }; | |
747 | ||
748 | static struct diff_words_style diff_words_styles[] = { | |
749 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, | |
750 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
751 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
752 | }; | |
753 | ||
754 | struct diff_words_data { | |
755 | struct diff_words_buffer minus, plus; | |
756 | const char *current_plus; | |
757 | int last_minus; | |
758 | struct diff_options *opt; | |
759 | regex_t *word_regex; | |
760 | enum diff_words_type type; | |
761 | struct diff_words_style *style; | |
762 | }; | |
763 | ||
764 | static int fn_out_diff_words_write_helper(FILE *fp, | |
765 | struct diff_words_style_elem *st_el, | |
766 | const char *newline, | |
767 | size_t count, const char *buf, | |
768 | const char *line_prefix) | |
769 | { | |
770 | int print = 0; | |
771 | ||
772 | while (count) { | |
773 | char *p = memchr(buf, '\n', count); | |
774 | if (print) | |
775 | fputs(line_prefix, fp); | |
776 | if (p != buf) { | |
777 | if (st_el->color && fputs(st_el->color, fp) < 0) | |
778 | return -1; | |
779 | if (fputs(st_el->prefix, fp) < 0 || | |
780 | fwrite(buf, p ? p - buf : count, 1, fp) != 1 || | |
781 | fputs(st_el->suffix, fp) < 0) | |
782 | return -1; | |
783 | if (st_el->color && *st_el->color | |
784 | && fputs(GIT_COLOR_RESET, fp) < 0) | |
785 | return -1; | |
786 | } | |
787 | if (!p) | |
788 | return 0; | |
789 | if (fputs(newline, fp) < 0) | |
790 | return -1; | |
791 | count -= p + 1 - buf; | |
792 | buf = p + 1; | |
793 | print = 1; | |
794 | } | |
795 | return 0; | |
796 | } | |
797 | ||
798 | /* | |
799 | * '--color-words' algorithm can be described as: | |
800 | * | |
801 | * 1. collect a the minus/plus lines of a diff hunk, divided into | |
802 | * minus-lines and plus-lines; | |
803 | * | |
804 | * 2. break both minus-lines and plus-lines into words and | |
805 | * place them into two mmfile_t with one word for each line; | |
806 | * | |
807 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
808 | * | |
809 | * And for the common parts of the both file, we output the plus side text. | |
810 | * diff_words->current_plus is used to trace the current position of the plus file | |
811 | * which printed. diff_words->last_minus is used to trace the last minus word | |
812 | * printed. | |
813 | * | |
814 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
815 | * on each line of color words output. Generally, there are two conditions on | |
816 | * which we should output the prefix. | |
817 | * | |
818 | * 1. diff_words->last_minus == 0 && | |
819 | * diff_words->current_plus == diff_words->plus.text.ptr | |
820 | * | |
821 | * that is: the plus text must start as a new line, and if there is no minus | |
822 | * word printed, a graph prefix must be printed. | |
823 | * | |
824 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
825 | * *(diff_words->current_plus - 1) == '\n' | |
826 | * | |
827 | * that is: a graph prefix must be printed following a '\n' | |
828 | */ | |
829 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
830 | { | |
831 | if ((diff_words->last_minus == 0 && | |
832 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
833 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
834 | *(diff_words->current_plus - 1) == '\n')) { | |
835 | return 1; | |
836 | } else { | |
837 | return 0; | |
838 | } | |
839 | } | |
840 | ||
841 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) | |
842 | { | |
843 | struct diff_words_data *diff_words = priv; | |
844 | struct diff_words_style *style = diff_words->style; | |
845 | int minus_first, minus_len, plus_first, plus_len; | |
846 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
847 | struct diff_options *opt = diff_words->opt; | |
848 | const char *line_prefix; | |
849 | ||
850 | if (line[0] != '@' || parse_hunk_header(line, len, | |
851 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
852 | return; | |
853 | ||
854 | assert(opt); | |
855 | line_prefix = diff_line_prefix(opt); | |
856 | ||
857 | /* POSIX requires that first be decremented by one if len == 0... */ | |
858 | if (minus_len) { | |
859 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
860 | minus_end = | |
861 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
862 | } else | |
863 | minus_begin = minus_end = | |
864 | diff_words->minus.orig[minus_first].end; | |
865 | ||
866 | if (plus_len) { | |
867 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
868 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
869 | } else | |
870 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
871 | ||
872 | if (color_words_output_graph_prefix(diff_words)) { | |
873 | fputs(line_prefix, diff_words->opt->file); | |
874 | } | |
875 | if (diff_words->current_plus != plus_begin) { | |
876 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
877 | &style->ctx, style->newline, | |
878 | plus_begin - diff_words->current_plus, | |
879 | diff_words->current_plus, line_prefix); | |
880 | if (*(plus_begin - 1) == '\n') | |
881 | fputs(line_prefix, diff_words->opt->file); | |
882 | } | |
883 | if (minus_begin != minus_end) { | |
884 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
885 | &style->old, style->newline, | |
886 | minus_end - minus_begin, minus_begin, | |
887 | line_prefix); | |
888 | } | |
889 | if (plus_begin != plus_end) { | |
890 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
891 | &style->new, style->newline, | |
892 | plus_end - plus_begin, plus_begin, | |
893 | line_prefix); | |
894 | } | |
895 | ||
896 | diff_words->current_plus = plus_end; | |
897 | diff_words->last_minus = minus_first; | |
898 | } | |
899 | ||
900 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ | |
901 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
902 | int *begin, int *end) | |
903 | { | |
904 | if (word_regex && *begin < buffer->size) { | |
905 | regmatch_t match[1]; | |
906 | if (!regexec(word_regex, buffer->ptr + *begin, 1, match, 0)) { | |
907 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, | |
908 | '\n', match[0].rm_eo - match[0].rm_so); | |
909 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
910 | *begin += match[0].rm_so; | |
911 | return *begin >= *end; | |
912 | } | |
913 | return -1; | |
914 | } | |
915 | ||
916 | /* find the next word */ | |
917 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
918 | (*begin)++; | |
919 | if (*begin >= buffer->size) | |
920 | return -1; | |
921 | ||
922 | /* find the end of the word */ | |
923 | *end = *begin + 1; | |
924 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
925 | (*end)++; | |
926 | ||
927 | return 0; | |
928 | } | |
929 | ||
930 | /* | |
931 | * This function splits the words in buffer->text, stores the list with | |
932 | * newline separator into out, and saves the offsets of the original words | |
933 | * in buffer->orig. | |
934 | */ | |
935 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, | |
936 | regex_t *word_regex) | |
937 | { | |
938 | int i, j; | |
939 | long alloc = 0; | |
940 | ||
941 | out->size = 0; | |
942 | out->ptr = NULL; | |
943 | ||
944 | /* fake an empty "0th" word */ | |
945 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
946 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
947 | buffer->orig_nr = 1; | |
948 | ||
949 | for (i = 0; i < buffer->text.size; i++) { | |
950 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) | |
951 | return; | |
952 | ||
953 | /* store original boundaries */ | |
954 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
955 | buffer->orig_alloc); | |
956 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
957 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
958 | buffer->orig_nr++; | |
959 | ||
960 | /* store one word */ | |
961 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); | |
962 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); | |
963 | out->ptr[out->size + j - i] = '\n'; | |
964 | out->size += j - i + 1; | |
965 | ||
966 | i = j - 1; | |
967 | } | |
968 | } | |
969 | ||
970 | /* this executes the word diff on the accumulated buffers */ | |
971 | static void diff_words_show(struct diff_words_data *diff_words) | |
972 | { | |
973 | xpparam_t xpp; | |
974 | xdemitconf_t xecfg; | |
975 | mmfile_t minus, plus; | |
976 | struct diff_words_style *style = diff_words->style; | |
977 | ||
978 | struct diff_options *opt = diff_words->opt; | |
979 | const char *line_prefix; | |
980 | ||
981 | assert(opt); | |
982 | line_prefix = diff_line_prefix(opt); | |
983 | ||
984 | /* special case: only removal */ | |
985 | if (!diff_words->plus.text.size) { | |
986 | fputs(line_prefix, diff_words->opt->file); | |
987 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
988 | &style->old, style->newline, | |
989 | diff_words->minus.text.size, | |
990 | diff_words->minus.text.ptr, line_prefix); | |
991 | diff_words->minus.text.size = 0; | |
992 | return; | |
993 | } | |
994 | ||
995 | diff_words->current_plus = diff_words->plus.text.ptr; | |
996 | diff_words->last_minus = 0; | |
997 | ||
998 | memset(&xpp, 0, sizeof(xpp)); | |
999 | memset(&xecfg, 0, sizeof(xecfg)); | |
1000 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); | |
1001 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
1002 | xpp.flags = 0; | |
1003 | /* as only the hunk header will be parsed, we need a 0-context */ | |
1004 | xecfg.ctxlen = 0; | |
1005 | xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, | |
1006 | &xpp, &xecfg); | |
1007 | free(minus.ptr); | |
1008 | free(plus.ptr); | |
1009 | if (diff_words->current_plus != diff_words->plus.text.ptr + | |
1010 | diff_words->plus.text.size) { | |
1011 | if (color_words_output_graph_prefix(diff_words)) | |
1012 | fputs(line_prefix, diff_words->opt->file); | |
1013 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
1014 | &style->ctx, style->newline, | |
1015 | diff_words->plus.text.ptr + diff_words->plus.text.size | |
1016 | - diff_words->current_plus, diff_words->current_plus, | |
1017 | line_prefix); | |
1018 | } | |
1019 | diff_words->minus.text.size = diff_words->plus.text.size = 0; | |
1020 | } | |
1021 | ||
1022 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ | |
1023 | static void diff_words_flush(struct emit_callback *ecbdata) | |
1024 | { | |
1025 | if (ecbdata->diff_words->minus.text.size || | |
1026 | ecbdata->diff_words->plus.text.size) | |
1027 | diff_words_show(ecbdata->diff_words); | |
1028 | } | |
1029 | ||
1030 | static void diff_filespec_load_driver(struct diff_filespec *one) | |
1031 | { | |
1032 | /* Use already-loaded driver */ | |
1033 | if (one->driver) | |
1034 | return; | |
1035 | ||
1036 | if (S_ISREG(one->mode)) | |
1037 | one->driver = userdiff_find_by_path(one->path); | |
1038 | ||
1039 | /* Fallback to default settings */ | |
1040 | if (!one->driver) | |
1041 | one->driver = userdiff_find_by_name("default"); | |
1042 | } | |
1043 | ||
1044 | static const char *userdiff_word_regex(struct diff_filespec *one) | |
1045 | { | |
1046 | diff_filespec_load_driver(one); | |
1047 | return one->driver->word_regex; | |
1048 | } | |
1049 | ||
1050 | static void init_diff_words_data(struct emit_callback *ecbdata, | |
1051 | struct diff_options *orig_opts, | |
1052 | struct diff_filespec *one, | |
1053 | struct diff_filespec *two) | |
1054 | { | |
1055 | int i; | |
1056 | struct diff_options *o = xmalloc(sizeof(struct diff_options)); | |
1057 | memcpy(o, orig_opts, sizeof(struct diff_options)); | |
1058 | ||
1059 | ecbdata->diff_words = | |
1060 | xcalloc(1, sizeof(struct diff_words_data)); | |
1061 | ecbdata->diff_words->type = o->word_diff; | |
1062 | ecbdata->diff_words->opt = o; | |
1063 | if (!o->word_regex) | |
1064 | o->word_regex = userdiff_word_regex(one); | |
1065 | if (!o->word_regex) | |
1066 | o->word_regex = userdiff_word_regex(two); | |
1067 | if (!o->word_regex) | |
1068 | o->word_regex = diff_word_regex_cfg; | |
1069 | if (o->word_regex) { | |
1070 | ecbdata->diff_words->word_regex = (regex_t *) | |
1071 | xmalloc(sizeof(regex_t)); | |
1072 | if (regcomp(ecbdata->diff_words->word_regex, | |
1073 | o->word_regex, | |
1074 | REG_EXTENDED | REG_NEWLINE)) | |
1075 | die ("Invalid regular expression: %s", | |
1076 | o->word_regex); | |
1077 | } | |
1078 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { | |
1079 | if (o->word_diff == diff_words_styles[i].type) { | |
1080 | ecbdata->diff_words->style = | |
1081 | &diff_words_styles[i]; | |
1082 | break; | |
1083 | } | |
1084 | } | |
1085 | if (want_color(o->use_color)) { | |
1086 | struct diff_words_style *st = ecbdata->diff_words->style; | |
1087 | st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1088 | st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
1089 | st->ctx.color = diff_get_color_opt(o, DIFF_PLAIN); | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | static void free_diff_words_data(struct emit_callback *ecbdata) | |
1094 | { | |
1095 | if (ecbdata->diff_words) { | |
1096 | diff_words_flush(ecbdata); | |
1097 | free (ecbdata->diff_words->opt); | |
1098 | free (ecbdata->diff_words->minus.text.ptr); | |
1099 | free (ecbdata->diff_words->minus.orig); | |
1100 | free (ecbdata->diff_words->plus.text.ptr); | |
1101 | free (ecbdata->diff_words->plus.orig); | |
1102 | if (ecbdata->diff_words->word_regex) { | |
1103 | regfree(ecbdata->diff_words->word_regex); | |
1104 | free(ecbdata->diff_words->word_regex); | |
1105 | } | |
1106 | free(ecbdata->diff_words); | |
1107 | ecbdata->diff_words = NULL; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | const char *diff_get_color(int diff_use_color, enum color_diff ix) | |
1112 | { | |
1113 | if (want_color(diff_use_color)) | |
1114 | return diff_colors[ix]; | |
1115 | return ""; | |
1116 | } | |
1117 | ||
1118 | const char *diff_line_prefix(struct diff_options *opt) | |
1119 | { | |
1120 | struct strbuf *msgbuf; | |
1121 | if (!opt->output_prefix) | |
1122 | return ""; | |
1123 | ||
1124 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
1125 | return msgbuf->buf; | |
1126 | } | |
1127 | ||
1128 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) | |
1129 | { | |
1130 | const char *cp; | |
1131 | unsigned long allot; | |
1132 | size_t l = len; | |
1133 | ||
1134 | if (ecb->truncate) | |
1135 | return ecb->truncate(line, len); | |
1136 | cp = line; | |
1137 | allot = l; | |
1138 | while (0 < l) { | |
1139 | (void) utf8_width(&cp, &l); | |
1140 | if (!cp) | |
1141 | break; /* truncated in the middle? */ | |
1142 | } | |
1143 | return allot - l; | |
1144 | } | |
1145 | ||
1146 | static void find_lno(const char *line, struct emit_callback *ecbdata) | |
1147 | { | |
1148 | const char *p; | |
1149 | ecbdata->lno_in_preimage = 0; | |
1150 | ecbdata->lno_in_postimage = 0; | |
1151 | p = strchr(line, '-'); | |
1152 | if (!p) | |
1153 | return; /* cannot happen */ | |
1154 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
1155 | p = strchr(p, '+'); | |
1156 | if (!p) | |
1157 | return; /* cannot happen */ | |
1158 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
1159 | } | |
1160 | ||
1161 | static void fn_out_consume(void *priv, char *line, unsigned long len) | |
1162 | { | |
1163 | struct emit_callback *ecbdata = priv; | |
1164 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); | |
1165 | const char *plain = diff_get_color(ecbdata->color_diff, DIFF_PLAIN); | |
1166 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
1167 | struct diff_options *o = ecbdata->opt; | |
1168 | const char *line_prefix = diff_line_prefix(o); | |
1169 | ||
1170 | if (ecbdata->header) { | |
1171 | fprintf(ecbdata->opt->file, "%s", ecbdata->header->buf); | |
1172 | strbuf_reset(ecbdata->header); | |
1173 | ecbdata->header = NULL; | |
1174 | } | |
1175 | *(ecbdata->found_changesp) = 1; | |
1176 | ||
1177 | if (ecbdata->label_path[0]) { | |
1178 | const char *name_a_tab, *name_b_tab; | |
1179 | ||
1180 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
1181 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
1182 | ||
1183 | fprintf(ecbdata->opt->file, "%s%s--- %s%s%s\n", | |
1184 | line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); | |
1185 | fprintf(ecbdata->opt->file, "%s%s+++ %s%s%s\n", | |
1186 | line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); | |
1187 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; | |
1188 | } | |
1189 | ||
1190 | if (diff_suppress_blank_empty | |
1191 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1192 | line[0] = '\n'; | |
1193 | len = 1; | |
1194 | } | |
1195 | ||
1196 | if (line[0] == '@') { | |
1197 | if (ecbdata->diff_words) | |
1198 | diff_words_flush(ecbdata); | |
1199 | len = sane_truncate_line(ecbdata, line, len); | |
1200 | find_lno(line, ecbdata); | |
1201 | emit_hunk_header(ecbdata, line, len); | |
1202 | if (line[len-1] != '\n') | |
1203 | putc('\n', ecbdata->opt->file); | |
1204 | return; | |
1205 | } | |
1206 | ||
1207 | if (len < 1) { | |
1208 | emit_line(ecbdata->opt, reset, reset, line, len); | |
1209 | if (ecbdata->diff_words | |
1210 | && ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) | |
1211 | fputs("~\n", ecbdata->opt->file); | |
1212 | return; | |
1213 | } | |
1214 | ||
1215 | if (ecbdata->diff_words) { | |
1216 | if (line[0] == '-') { | |
1217 | diff_words_append(line, len, | |
1218 | &ecbdata->diff_words->minus); | |
1219 | return; | |
1220 | } else if (line[0] == '+') { | |
1221 | diff_words_append(line, len, | |
1222 | &ecbdata->diff_words->plus); | |
1223 | return; | |
1224 | } else if (starts_with(line, "\\ ")) { | |
1225 | /* | |
1226 | * Eat the "no newline at eof" marker as if we | |
1227 | * saw a "+" or "-" line with nothing on it, | |
1228 | * and return without diff_words_flush() to | |
1229 | * defer processing. If this is the end of | |
1230 | * preimage, more "+" lines may come after it. | |
1231 | */ | |
1232 | return; | |
1233 | } | |
1234 | diff_words_flush(ecbdata); | |
1235 | if (ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN) { | |
1236 | emit_line(ecbdata->opt, plain, reset, line, len); | |
1237 | fputs("~\n", ecbdata->opt->file); | |
1238 | } else { | |
1239 | /* | |
1240 | * Skip the prefix character, if any. With | |
1241 | * diff_suppress_blank_empty, there may be | |
1242 | * none. | |
1243 | */ | |
1244 | if (line[0] != '\n') { | |
1245 | line++; | |
1246 | len--; | |
1247 | } | |
1248 | emit_line(ecbdata->opt, plain, reset, line, len); | |
1249 | } | |
1250 | return; | |
1251 | } | |
1252 | ||
1253 | if (line[0] != '+') { | |
1254 | const char *color = | |
1255 | diff_get_color(ecbdata->color_diff, | |
1256 | line[0] == '-' ? DIFF_FILE_OLD : DIFF_PLAIN); | |
1257 | ecbdata->lno_in_preimage++; | |
1258 | if (line[0] == ' ') | |
1259 | ecbdata->lno_in_postimage++; | |
1260 | emit_line(ecbdata->opt, color, reset, line, len); | |
1261 | } else { | |
1262 | ecbdata->lno_in_postimage++; | |
1263 | emit_add_line(reset, ecbdata, line + 1, len - 1); | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | static char *pprint_rename(const char *a, const char *b) | |
1268 | { | |
1269 | const char *old = a; | |
1270 | const char *new = b; | |
1271 | struct strbuf name = STRBUF_INIT; | |
1272 | int pfx_length, sfx_length; | |
1273 | int pfx_adjust_for_slash; | |
1274 | int len_a = strlen(a); | |
1275 | int len_b = strlen(b); | |
1276 | int a_midlen, b_midlen; | |
1277 | int qlen_a = quote_c_style(a, NULL, NULL, 0); | |
1278 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
1279 | ||
1280 | if (qlen_a || qlen_b) { | |
1281 | quote_c_style(a, &name, NULL, 0); | |
1282 | strbuf_addstr(&name, " => "); | |
1283 | quote_c_style(b, &name, NULL, 0); | |
1284 | return strbuf_detach(&name, NULL); | |
1285 | } | |
1286 | ||
1287 | /* Find common prefix */ | |
1288 | pfx_length = 0; | |
1289 | while (*old && *new && *old == *new) { | |
1290 | if (*old == '/') | |
1291 | pfx_length = old - a + 1; | |
1292 | old++; | |
1293 | new++; | |
1294 | } | |
1295 | ||
1296 | /* Find common suffix */ | |
1297 | old = a + len_a; | |
1298 | new = b + len_b; | |
1299 | sfx_length = 0; | |
1300 | /* | |
1301 | * If there is a common prefix, it must end in a slash. In | |
1302 | * that case we let this loop run 1 into the prefix to see the | |
1303 | * same slash. | |
1304 | * | |
1305 | * If there is no common prefix, we cannot do this as it would | |
1306 | * underrun the input strings. | |
1307 | */ | |
1308 | pfx_adjust_for_slash = (pfx_length ? 1 : 0); | |
1309 | while (a + pfx_length - pfx_adjust_for_slash <= old && | |
1310 | b + pfx_length - pfx_adjust_for_slash <= new && | |
1311 | *old == *new) { | |
1312 | if (*old == '/') | |
1313 | sfx_length = len_a - (old - a); | |
1314 | old--; | |
1315 | new--; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * pfx{mid-a => mid-b}sfx | |
1320 | * {pfx-a => pfx-b}sfx | |
1321 | * pfx{sfx-a => sfx-b} | |
1322 | * name-a => name-b | |
1323 | */ | |
1324 | a_midlen = len_a - pfx_length - sfx_length; | |
1325 | b_midlen = len_b - pfx_length - sfx_length; | |
1326 | if (a_midlen < 0) | |
1327 | a_midlen = 0; | |
1328 | if (b_midlen < 0) | |
1329 | b_midlen = 0; | |
1330 | ||
1331 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
1332 | if (pfx_length + sfx_length) { | |
1333 | strbuf_add(&name, a, pfx_length); | |
1334 | strbuf_addch(&name, '{'); | |
1335 | } | |
1336 | strbuf_add(&name, a + pfx_length, a_midlen); | |
1337 | strbuf_addstr(&name, " => "); | |
1338 | strbuf_add(&name, b + pfx_length, b_midlen); | |
1339 | if (pfx_length + sfx_length) { | |
1340 | strbuf_addch(&name, '}'); | |
1341 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
1342 | } | |
1343 | return strbuf_detach(&name, NULL); | |
1344 | } | |
1345 | ||
1346 | struct diffstat_t { | |
1347 | int nr; | |
1348 | int alloc; | |
1349 | struct diffstat_file { | |
1350 | char *from_name; | |
1351 | char *name; | |
1352 | char *print_name; | |
1353 | unsigned is_unmerged:1; | |
1354 | unsigned is_binary:1; | |
1355 | unsigned is_renamed:1; | |
1356 | unsigned is_interesting:1; | |
1357 | uintmax_t added, deleted; | |
1358 | } **files; | |
1359 | }; | |
1360 | ||
1361 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
1362 | const char *name_a, | |
1363 | const char *name_b) | |
1364 | { | |
1365 | struct diffstat_file *x; | |
1366 | x = xcalloc(1, sizeof(*x)); | |
1367 | ALLOC_GROW(diffstat->files, diffstat->nr + 1, diffstat->alloc); | |
1368 | diffstat->files[diffstat->nr++] = x; | |
1369 | if (name_b) { | |
1370 | x->from_name = xstrdup(name_a); | |
1371 | x->name = xstrdup(name_b); | |
1372 | x->is_renamed = 1; | |
1373 | } | |
1374 | else { | |
1375 | x->from_name = NULL; | |
1376 | x->name = xstrdup(name_a); | |
1377 | } | |
1378 | return x; | |
1379 | } | |
1380 | ||
1381 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
1382 | { | |
1383 | struct diffstat_t *diffstat = priv; | |
1384 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
1385 | ||
1386 | if (line[0] == '+') | |
1387 | x->added++; | |
1388 | else if (line[0] == '-') | |
1389 | x->deleted++; | |
1390 | } | |
1391 | ||
1392 | const char mime_boundary_leader[] = "------------"; | |
1393 | ||
1394 | static int scale_linear(int it, int width, int max_change) | |
1395 | { | |
1396 | if (!it) | |
1397 | return 0; | |
1398 | /* | |
1399 | * make sure that at least one '-' or '+' is printed if | |
1400 | * there is any change to this path. The easiest way is to | |
1401 | * scale linearly as if the alloted width is one column shorter | |
1402 | * than it is, and then add 1 to the result. | |
1403 | */ | |
1404 | return 1 + (it * (width - 1) / max_change); | |
1405 | } | |
1406 | ||
1407 | static void show_name(FILE *file, | |
1408 | const char *prefix, const char *name, int len) | |
1409 | { | |
1410 | fprintf(file, " %s%-*s |", prefix, len, name); | |
1411 | } | |
1412 | ||
1413 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) | |
1414 | { | |
1415 | if (cnt <= 0) | |
1416 | return; | |
1417 | fprintf(file, "%s", set); | |
1418 | while (cnt--) | |
1419 | putc(ch, file); | |
1420 | fprintf(file, "%s", reset); | |
1421 | } | |
1422 | ||
1423 | static void fill_print_name(struct diffstat_file *file) | |
1424 | { | |
1425 | char *pname; | |
1426 | ||
1427 | if (file->print_name) | |
1428 | return; | |
1429 | ||
1430 | if (!file->is_renamed) { | |
1431 | struct strbuf buf = STRBUF_INIT; | |
1432 | if (quote_c_style(file->name, &buf, NULL, 0)) { | |
1433 | pname = strbuf_detach(&buf, NULL); | |
1434 | } else { | |
1435 | pname = file->name; | |
1436 | strbuf_release(&buf); | |
1437 | } | |
1438 | } else { | |
1439 | pname = pprint_rename(file->from_name, file->name); | |
1440 | } | |
1441 | file->print_name = pname; | |
1442 | } | |
1443 | ||
1444 | int print_stat_summary(FILE *fp, int files, int insertions, int deletions) | |
1445 | { | |
1446 | struct strbuf sb = STRBUF_INIT; | |
1447 | int ret; | |
1448 | ||
1449 | if (!files) { | |
1450 | assert(insertions == 0 && deletions == 0); | |
1451 | return fprintf(fp, "%s\n", " 0 files changed"); | |
1452 | } | |
1453 | ||
1454 | strbuf_addf(&sb, | |
1455 | (files == 1) ? " %d file changed" : " %d files changed", | |
1456 | files); | |
1457 | ||
1458 | /* | |
1459 | * For binary diff, the caller may want to print "x files | |
1460 | * changed" with insertions == 0 && deletions == 0. | |
1461 | * | |
1462 | * Not omitting "0 insertions(+), 0 deletions(-)" in this case | |
1463 | * is probably less confusing (i.e skip over "2 files changed | |
1464 | * but nothing about added/removed lines? Is this a bug in Git?"). | |
1465 | */ | |
1466 | if (insertions || deletions == 0) { | |
1467 | strbuf_addf(&sb, | |
1468 | (insertions == 1) ? ", %d insertion(+)" : ", %d insertions(+)", | |
1469 | insertions); | |
1470 | } | |
1471 | ||
1472 | if (deletions || insertions == 0) { | |
1473 | strbuf_addf(&sb, | |
1474 | (deletions == 1) ? ", %d deletion(-)" : ", %d deletions(-)", | |
1475 | deletions); | |
1476 | } | |
1477 | strbuf_addch(&sb, '\n'); | |
1478 | ret = fputs(sb.buf, fp); | |
1479 | strbuf_release(&sb); | |
1480 | return ret; | |
1481 | } | |
1482 | ||
1483 | static void show_stats(struct diffstat_t *data, struct diff_options *options) | |
1484 | { | |
1485 | int i, len, add, del, adds = 0, dels = 0; | |
1486 | uintmax_t max_change = 0, max_len = 0; | |
1487 | int total_files = data->nr, count; | |
1488 | int width, name_width, graph_width, number_width = 0, bin_width = 0; | |
1489 | const char *reset, *add_c, *del_c; | |
1490 | const char *line_prefix = ""; | |
1491 | int extra_shown = 0; | |
1492 | ||
1493 | if (data->nr == 0) | |
1494 | return; | |
1495 | ||
1496 | line_prefix = diff_line_prefix(options); | |
1497 | count = options->stat_count ? options->stat_count : data->nr; | |
1498 | ||
1499 | reset = diff_get_color_opt(options, DIFF_RESET); | |
1500 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); | |
1501 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
1502 | ||
1503 | /* | |
1504 | * Find the longest filename and max number of changes | |
1505 | */ | |
1506 | for (i = 0; (i < count) && (i < data->nr); i++) { | |
1507 | struct diffstat_file *file = data->files[i]; | |
1508 | uintmax_t change = file->added + file->deleted; | |
1509 | ||
1510 | if (!file->is_interesting && (change == 0)) { | |
1511 | count++; /* not shown == room for one more */ | |
1512 | continue; | |
1513 | } | |
1514 | fill_print_name(file); | |
1515 | len = strlen(file->print_name); | |
1516 | if (max_len < len) | |
1517 | max_len = len; | |
1518 | ||
1519 | if (file->is_unmerged) { | |
1520 | /* "Unmerged" is 8 characters */ | |
1521 | bin_width = bin_width < 8 ? 8 : bin_width; | |
1522 | continue; | |
1523 | } | |
1524 | if (file->is_binary) { | |
1525 | /* "Bin XXX -> YYY bytes" */ | |
1526 | int w = 14 + decimal_width(file->added) | |
1527 | + decimal_width(file->deleted); | |
1528 | bin_width = bin_width < w ? w : bin_width; | |
1529 | /* Display change counts aligned with "Bin" */ | |
1530 | number_width = 3; | |
1531 | continue; | |
1532 | } | |
1533 | ||
1534 | if (max_change < change) | |
1535 | max_change = change; | |
1536 | } | |
1537 | count = i; /* where we can stop scanning in data->files[] */ | |
1538 | ||
1539 | /* | |
1540 | * We have width = stat_width or term_columns() columns total. | |
1541 | * We want a maximum of min(max_len, stat_name_width) for the name part. | |
1542 | * We want a maximum of min(max_change, stat_graph_width) for the +- part. | |
1543 | * We also need 1 for " " and 4 + decimal_width(max_change) | |
1544 | * for " | NNNN " and one the empty column at the end, altogether | |
1545 | * 6 + decimal_width(max_change). | |
1546 | * | |
1547 | * If there's not enough space, we will use the smaller of | |
1548 | * stat_name_width (if set) and 5/8*width for the filename, | |
1549 | * and the rest for constant elements + graph part, but no more | |
1550 | * than stat_graph_width for the graph part. | |
1551 | * (5/8 gives 50 for filename and 30 for the constant parts + graph | |
1552 | * for the standard terminal size). | |
1553 | * | |
1554 | * In other words: stat_width limits the maximum width, and | |
1555 | * stat_name_width fixes the maximum width of the filename, | |
1556 | * and is also used to divide available columns if there | |
1557 | * aren't enough. | |
1558 | * | |
1559 | * Binary files are displayed with "Bin XXX -> YYY bytes" | |
1560 | * instead of the change count and graph. This part is treated | |
1561 | * similarly to the graph part, except that it is not | |
1562 | * "scaled". If total width is too small to accommodate the | |
1563 | * guaranteed minimum width of the filename part and the | |
1564 | * separators and this message, this message will "overflow" | |
1565 | * making the line longer than the maximum width. | |
1566 | */ | |
1567 | ||
1568 | if (options->stat_width == -1) | |
1569 | width = term_columns() - options->output_prefix_length; | |
1570 | else | |
1571 | width = options->stat_width ? options->stat_width : 80; | |
1572 | number_width = decimal_width(max_change) > number_width ? | |
1573 | decimal_width(max_change) : number_width; | |
1574 | ||
1575 | if (options->stat_graph_width == -1) | |
1576 | options->stat_graph_width = diff_stat_graph_width; | |
1577 | ||
1578 | /* | |
1579 | * Guarantee 3/8*16==6 for the graph part | |
1580 | * and 5/8*16==10 for the filename part | |
1581 | */ | |
1582 | if (width < 16 + 6 + number_width) | |
1583 | width = 16 + 6 + number_width; | |
1584 | ||
1585 | /* | |
1586 | * First assign sizes that are wanted, ignoring available width. | |
1587 | * strlen("Bin XXX -> YYY bytes") == bin_width, and the part | |
1588 | * starting from "XXX" should fit in graph_width. | |
1589 | */ | |
1590 | graph_width = max_change + 4 > bin_width ? max_change : bin_width - 4; | |
1591 | if (options->stat_graph_width && | |
1592 | options->stat_graph_width < graph_width) | |
1593 | graph_width = options->stat_graph_width; | |
1594 | ||
1595 | name_width = (options->stat_name_width > 0 && | |
1596 | options->stat_name_width < max_len) ? | |
1597 | options->stat_name_width : max_len; | |
1598 | ||
1599 | /* | |
1600 | * Adjust adjustable widths not to exceed maximum width | |
1601 | */ | |
1602 | if (name_width + number_width + 6 + graph_width > width) { | |
1603 | if (graph_width > width * 3/8 - number_width - 6) { | |
1604 | graph_width = width * 3/8 - number_width - 6; | |
1605 | if (graph_width < 6) | |
1606 | graph_width = 6; | |
1607 | } | |
1608 | ||
1609 | if (options->stat_graph_width && | |
1610 | graph_width > options->stat_graph_width) | |
1611 | graph_width = options->stat_graph_width; | |
1612 | if (name_width > width - number_width - 6 - graph_width) | |
1613 | name_width = width - number_width - 6 - graph_width; | |
1614 | else | |
1615 | graph_width = width - number_width - 6 - name_width; | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * From here name_width is the width of the name area, | |
1620 | * and graph_width is the width of the graph area. | |
1621 | * max_change is used to scale graph properly. | |
1622 | */ | |
1623 | for (i = 0; i < count; i++) { | |
1624 | const char *prefix = ""; | |
1625 | struct diffstat_file *file = data->files[i]; | |
1626 | char *name = file->print_name; | |
1627 | uintmax_t added = file->added; | |
1628 | uintmax_t deleted = file->deleted; | |
1629 | int name_len; | |
1630 | ||
1631 | if (!file->is_interesting && (added + deleted == 0)) | |
1632 | continue; | |
1633 | ||
1634 | /* | |
1635 | * "scale" the filename | |
1636 | */ | |
1637 | len = name_width; | |
1638 | name_len = strlen(name); | |
1639 | if (name_width < name_len) { | |
1640 | char *slash; | |
1641 | prefix = "..."; | |
1642 | len -= 3; | |
1643 | name += name_len - len; | |
1644 | slash = strchr(name, '/'); | |
1645 | if (slash) | |
1646 | name = slash; | |
1647 | } | |
1648 | ||
1649 | if (file->is_binary) { | |
1650 | fprintf(options->file, "%s", line_prefix); | |
1651 | show_name(options->file, prefix, name, len); | |
1652 | fprintf(options->file, " %*s", number_width, "Bin"); | |
1653 | if (!added && !deleted) { | |
1654 | putc('\n', options->file); | |
1655 | continue; | |
1656 | } | |
1657 | fprintf(options->file, " %s%"PRIuMAX"%s", | |
1658 | del_c, deleted, reset); | |
1659 | fprintf(options->file, " -> "); | |
1660 | fprintf(options->file, "%s%"PRIuMAX"%s", | |
1661 | add_c, added, reset); | |
1662 | fprintf(options->file, " bytes"); | |
1663 | fprintf(options->file, "\n"); | |
1664 | continue; | |
1665 | } | |
1666 | else if (file->is_unmerged) { | |
1667 | fprintf(options->file, "%s", line_prefix); | |
1668 | show_name(options->file, prefix, name, len); | |
1669 | fprintf(options->file, " Unmerged\n"); | |
1670 | continue; | |
1671 | } | |
1672 | ||
1673 | /* | |
1674 | * scale the add/delete | |
1675 | */ | |
1676 | add = added; | |
1677 | del = deleted; | |
1678 | ||
1679 | if (graph_width <= max_change) { | |
1680 | int total = scale_linear(add + del, graph_width, max_change); | |
1681 | if (total < 2 && add && del) | |
1682 | /* width >= 2 due to the sanity check */ | |
1683 | total = 2; | |
1684 | if (add < del) { | |
1685 | add = scale_linear(add, graph_width, max_change); | |
1686 | del = total - add; | |
1687 | } else { | |
1688 | del = scale_linear(del, graph_width, max_change); | |
1689 | add = total - del; | |
1690 | } | |
1691 | } | |
1692 | fprintf(options->file, "%s", line_prefix); | |
1693 | show_name(options->file, prefix, name, len); | |
1694 | fprintf(options->file, " %*"PRIuMAX"%s", | |
1695 | number_width, added + deleted, | |
1696 | added + deleted ? " " : ""); | |
1697 | show_graph(options->file, '+', add, add_c, reset); | |
1698 | show_graph(options->file, '-', del, del_c, reset); | |
1699 | fprintf(options->file, "\n"); | |
1700 | } | |
1701 | ||
1702 | for (i = 0; i < data->nr; i++) { | |
1703 | struct diffstat_file *file = data->files[i]; | |
1704 | uintmax_t added = file->added; | |
1705 | uintmax_t deleted = file->deleted; | |
1706 | ||
1707 | if (file->is_unmerged || | |
1708 | (!file->is_interesting && (added + deleted == 0))) { | |
1709 | total_files--; | |
1710 | continue; | |
1711 | } | |
1712 | ||
1713 | if (!file->is_binary) { | |
1714 | adds += added; | |
1715 | dels += deleted; | |
1716 | } | |
1717 | if (i < count) | |
1718 | continue; | |
1719 | if (!extra_shown) | |
1720 | fprintf(options->file, "%s ...\n", line_prefix); | |
1721 | extra_shown = 1; | |
1722 | } | |
1723 | fprintf(options->file, "%s", line_prefix); | |
1724 | print_stat_summary(options->file, total_files, adds, dels); | |
1725 | } | |
1726 | ||
1727 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) | |
1728 | { | |
1729 | int i, adds = 0, dels = 0, total_files = data->nr; | |
1730 | ||
1731 | if (data->nr == 0) | |
1732 | return; | |
1733 | ||
1734 | for (i = 0; i < data->nr; i++) { | |
1735 | int added = data->files[i]->added; | |
1736 | int deleted= data->files[i]->deleted; | |
1737 | ||
1738 | if (data->files[i]->is_unmerged || | |
1739 | (!data->files[i]->is_interesting && (added + deleted == 0))) { | |
1740 | total_files--; | |
1741 | } else if (!data->files[i]->is_binary) { /* don't count bytes */ | |
1742 | adds += added; | |
1743 | dels += deleted; | |
1744 | } | |
1745 | } | |
1746 | fprintf(options->file, "%s", diff_line_prefix(options)); | |
1747 | print_stat_summary(options->file, total_files, adds, dels); | |
1748 | } | |
1749 | ||
1750 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) | |
1751 | { | |
1752 | int i; | |
1753 | ||
1754 | if (data->nr == 0) | |
1755 | return; | |
1756 | ||
1757 | for (i = 0; i < data->nr; i++) { | |
1758 | struct diffstat_file *file = data->files[i]; | |
1759 | ||
1760 | fprintf(options->file, "%s", diff_line_prefix(options)); | |
1761 | ||
1762 | if (file->is_binary) | |
1763 | fprintf(options->file, "-\t-\t"); | |
1764 | else | |
1765 | fprintf(options->file, | |
1766 | "%"PRIuMAX"\t%"PRIuMAX"\t", | |
1767 | file->added, file->deleted); | |
1768 | if (options->line_termination) { | |
1769 | fill_print_name(file); | |
1770 | if (!file->is_renamed) | |
1771 | write_name_quoted(file->name, options->file, | |
1772 | options->line_termination); | |
1773 | else { | |
1774 | fputs(file->print_name, options->file); | |
1775 | putc(options->line_termination, options->file); | |
1776 | } | |
1777 | } else { | |
1778 | if (file->is_renamed) { | |
1779 | putc('\0', options->file); | |
1780 | write_name_quoted(file->from_name, options->file, '\0'); | |
1781 | } | |
1782 | write_name_quoted(file->name, options->file, '\0'); | |
1783 | } | |
1784 | } | |
1785 | } | |
1786 | ||
1787 | struct dirstat_file { | |
1788 | const char *name; | |
1789 | unsigned long changed; | |
1790 | }; | |
1791 | ||
1792 | struct dirstat_dir { | |
1793 | struct dirstat_file *files; | |
1794 | int alloc, nr, permille, cumulative; | |
1795 | }; | |
1796 | ||
1797 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, | |
1798 | unsigned long changed, const char *base, int baselen) | |
1799 | { | |
1800 | unsigned long this_dir = 0; | |
1801 | unsigned int sources = 0; | |
1802 | const char *line_prefix = diff_line_prefix(opt); | |
1803 | ||
1804 | while (dir->nr) { | |
1805 | struct dirstat_file *f = dir->files; | |
1806 | int namelen = strlen(f->name); | |
1807 | unsigned long this; | |
1808 | char *slash; | |
1809 | ||
1810 | if (namelen < baselen) | |
1811 | break; | |
1812 | if (memcmp(f->name, base, baselen)) | |
1813 | break; | |
1814 | slash = strchr(f->name + baselen, '/'); | |
1815 | if (slash) { | |
1816 | int newbaselen = slash + 1 - f->name; | |
1817 | this = gather_dirstat(opt, dir, changed, f->name, newbaselen); | |
1818 | sources++; | |
1819 | } else { | |
1820 | this = f->changed; | |
1821 | dir->files++; | |
1822 | dir->nr--; | |
1823 | sources += 2; | |
1824 | } | |
1825 | this_dir += this; | |
1826 | } | |
1827 | ||
1828 | /* | |
1829 | * We don't report dirstat's for | |
1830 | * - the top level | |
1831 | * - or cases where everything came from a single directory | |
1832 | * under this directory (sources == 1). | |
1833 | */ | |
1834 | if (baselen && sources != 1) { | |
1835 | if (this_dir) { | |
1836 | int permille = this_dir * 1000 / changed; | |
1837 | if (permille >= dir->permille) { | |
1838 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, | |
1839 | permille / 10, permille % 10, baselen, base); | |
1840 | if (!dir->cumulative) | |
1841 | return 0; | |
1842 | } | |
1843 | } | |
1844 | } | |
1845 | return this_dir; | |
1846 | } | |
1847 | ||
1848 | static int dirstat_compare(const void *_a, const void *_b) | |
1849 | { | |
1850 | const struct dirstat_file *a = _a; | |
1851 | const struct dirstat_file *b = _b; | |
1852 | return strcmp(a->name, b->name); | |
1853 | } | |
1854 | ||
1855 | static void show_dirstat(struct diff_options *options) | |
1856 | { | |
1857 | int i; | |
1858 | unsigned long changed; | |
1859 | struct dirstat_dir dir; | |
1860 | struct diff_queue_struct *q = &diff_queued_diff; | |
1861 | ||
1862 | dir.files = NULL; | |
1863 | dir.alloc = 0; | |
1864 | dir.nr = 0; | |
1865 | dir.permille = options->dirstat_permille; | |
1866 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); | |
1867 | ||
1868 | changed = 0; | |
1869 | for (i = 0; i < q->nr; i++) { | |
1870 | struct diff_filepair *p = q->queue[i]; | |
1871 | const char *name; | |
1872 | unsigned long copied, added, damage; | |
1873 | int content_changed; | |
1874 | ||
1875 | name = p->two->path ? p->two->path : p->one->path; | |
1876 | ||
1877 | if (p->one->sha1_valid && p->two->sha1_valid) | |
1878 | content_changed = hashcmp(p->one->sha1, p->two->sha1); | |
1879 | else | |
1880 | content_changed = 1; | |
1881 | ||
1882 | if (!content_changed) { | |
1883 | /* | |
1884 | * The SHA1 has not changed, so pre-/post-content is | |
1885 | * identical. We can therefore skip looking at the | |
1886 | * file contents altogether. | |
1887 | */ | |
1888 | damage = 0; | |
1889 | goto found_damage; | |
1890 | } | |
1891 | ||
1892 | if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { | |
1893 | /* | |
1894 | * In --dirstat-by-file mode, we don't really need to | |
1895 | * look at the actual file contents at all. | |
1896 | * The fact that the SHA1 changed is enough for us to | |
1897 | * add this file to the list of results | |
1898 | * (with each file contributing equal damage). | |
1899 | */ | |
1900 | damage = 1; | |
1901 | goto found_damage; | |
1902 | } | |
1903 | ||
1904 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
1905 | diff_populate_filespec(p->one, 0); | |
1906 | diff_populate_filespec(p->two, 0); | |
1907 | diffcore_count_changes(p->one, p->two, NULL, NULL, 0, | |
1908 | &copied, &added); | |
1909 | diff_free_filespec_data(p->one); | |
1910 | diff_free_filespec_data(p->two); | |
1911 | } else if (DIFF_FILE_VALID(p->one)) { | |
1912 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY); | |
1913 | copied = added = 0; | |
1914 | diff_free_filespec_data(p->one); | |
1915 | } else if (DIFF_FILE_VALID(p->two)) { | |
1916 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY); | |
1917 | copied = 0; | |
1918 | added = p->two->size; | |
1919 | diff_free_filespec_data(p->two); | |
1920 | } else | |
1921 | continue; | |
1922 | ||
1923 | /* | |
1924 | * Original minus copied is the removed material, | |
1925 | * added is the new material. They are both damages | |
1926 | * made to the preimage. | |
1927 | * If the resulting damage is zero, we know that | |
1928 | * diffcore_count_changes() considers the two entries to | |
1929 | * be identical, but since content_changed is true, we | |
1930 | * know that there must have been _some_ kind of change, | |
1931 | * so we force all entries to have damage > 0. | |
1932 | */ | |
1933 | damage = (p->one->size - copied) + added; | |
1934 | if (!damage) | |
1935 | damage = 1; | |
1936 | ||
1937 | found_damage: | |
1938 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
1939 | dir.files[dir.nr].name = name; | |
1940 | dir.files[dir.nr].changed = damage; | |
1941 | changed += damage; | |
1942 | dir.nr++; | |
1943 | } | |
1944 | ||
1945 | /* This can happen even with many files, if everything was renames */ | |
1946 | if (!changed) | |
1947 | return; | |
1948 | ||
1949 | /* Show all directories with more than x% of the changes */ | |
1950 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); | |
1951 | gather_dirstat(options, &dir, changed, "", 0); | |
1952 | } | |
1953 | ||
1954 | static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) | |
1955 | { | |
1956 | int i; | |
1957 | unsigned long changed; | |
1958 | struct dirstat_dir dir; | |
1959 | ||
1960 | if (data->nr == 0) | |
1961 | return; | |
1962 | ||
1963 | dir.files = NULL; | |
1964 | dir.alloc = 0; | |
1965 | dir.nr = 0; | |
1966 | dir.permille = options->dirstat_permille; | |
1967 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); | |
1968 | ||
1969 | changed = 0; | |
1970 | for (i = 0; i < data->nr; i++) { | |
1971 | struct diffstat_file *file = data->files[i]; | |
1972 | unsigned long damage = file->added + file->deleted; | |
1973 | if (file->is_binary) | |
1974 | /* | |
1975 | * binary files counts bytes, not lines. Must find some | |
1976 | * way to normalize binary bytes vs. textual lines. | |
1977 | * The following heuristic assumes that there are 64 | |
1978 | * bytes per "line". | |
1979 | * This is stupid and ugly, but very cheap... | |
1980 | */ | |
1981 | damage = (damage + 63) / 64; | |
1982 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
1983 | dir.files[dir.nr].name = file->name; | |
1984 | dir.files[dir.nr].changed = damage; | |
1985 | changed += damage; | |
1986 | dir.nr++; | |
1987 | } | |
1988 | ||
1989 | /* This can happen even with many files, if everything was renames */ | |
1990 | if (!changed) | |
1991 | return; | |
1992 | ||
1993 | /* Show all directories with more than x% of the changes */ | |
1994 | qsort(dir.files, dir.nr, sizeof(dir.files[0]), dirstat_compare); | |
1995 | gather_dirstat(options, &dir, changed, "", 0); | |
1996 | } | |
1997 | ||
1998 | static void free_diffstat_info(struct diffstat_t *diffstat) | |
1999 | { | |
2000 | int i; | |
2001 | for (i = 0; i < diffstat->nr; i++) { | |
2002 | struct diffstat_file *f = diffstat->files[i]; | |
2003 | if (f->name != f->print_name) | |
2004 | free(f->print_name); | |
2005 | free(f->name); | |
2006 | free(f->from_name); | |
2007 | free(f); | |
2008 | } | |
2009 | free(diffstat->files); | |
2010 | } | |
2011 | ||
2012 | struct checkdiff_t { | |
2013 | const char *filename; | |
2014 | int lineno; | |
2015 | int conflict_marker_size; | |
2016 | struct diff_options *o; | |
2017 | unsigned ws_rule; | |
2018 | unsigned status; | |
2019 | }; | |
2020 | ||
2021 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) | |
2022 | { | |
2023 | char firstchar; | |
2024 | int cnt; | |
2025 | ||
2026 | if (len < marker_size + 1) | |
2027 | return 0; | |
2028 | firstchar = line[0]; | |
2029 | switch (firstchar) { | |
2030 | case '=': case '>': case '<': case '|': | |
2031 | break; | |
2032 | default: | |
2033 | return 0; | |
2034 | } | |
2035 | for (cnt = 1; cnt < marker_size; cnt++) | |
2036 | if (line[cnt] != firstchar) | |
2037 | return 0; | |
2038 | /* line[1] thru line[marker_size-1] are same as firstchar */ | |
2039 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
2040 | return 0; | |
2041 | return 1; | |
2042 | } | |
2043 | ||
2044 | static void checkdiff_consume(void *priv, char *line, unsigned long len) | |
2045 | { | |
2046 | struct checkdiff_t *data = priv; | |
2047 | int marker_size = data->conflict_marker_size; | |
2048 | const char *ws = diff_get_color(data->o->use_color, DIFF_WHITESPACE); | |
2049 | const char *reset = diff_get_color(data->o->use_color, DIFF_RESET); | |
2050 | const char *set = diff_get_color(data->o->use_color, DIFF_FILE_NEW); | |
2051 | char *err; | |
2052 | const char *line_prefix; | |
2053 | ||
2054 | assert(data->o); | |
2055 | line_prefix = diff_line_prefix(data->o); | |
2056 | ||
2057 | if (line[0] == '+') { | |
2058 | unsigned bad; | |
2059 | data->lineno++; | |
2060 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { | |
2061 | data->status |= 1; | |
2062 | fprintf(data->o->file, | |
2063 | "%s%s:%d: leftover conflict marker\n", | |
2064 | line_prefix, data->filename, data->lineno); | |
2065 | } | |
2066 | bad = ws_check(line + 1, len - 1, data->ws_rule); | |
2067 | if (!bad) | |
2068 | return; | |
2069 | data->status |= bad; | |
2070 | err = whitespace_error_string(bad); | |
2071 | fprintf(data->o->file, "%s%s:%d: %s.\n", | |
2072 | line_prefix, data->filename, data->lineno, err); | |
2073 | free(err); | |
2074 | emit_line(data->o, set, reset, line, 1); | |
2075 | ws_check_emit(line + 1, len - 1, data->ws_rule, | |
2076 | data->o->file, set, reset, ws); | |
2077 | } else if (line[0] == ' ') { | |
2078 | data->lineno++; | |
2079 | } else if (line[0] == '@') { | |
2080 | char *plus = strchr(line, '+'); | |
2081 | if (plus) | |
2082 | data->lineno = strtol(plus, NULL, 10) - 1; | |
2083 | else | |
2084 | die("invalid diff"); | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | static unsigned char *deflate_it(char *data, | |
2089 | unsigned long size, | |
2090 | unsigned long *result_size) | |
2091 | { | |
2092 | int bound; | |
2093 | unsigned char *deflated; | |
2094 | git_zstream stream; | |
2095 | ||
2096 | git_deflate_init(&stream, zlib_compression_level); | |
2097 | bound = git_deflate_bound(&stream, size); | |
2098 | deflated = xmalloc(bound); | |
2099 | stream.next_out = deflated; | |
2100 | stream.avail_out = bound; | |
2101 | ||
2102 | stream.next_in = (unsigned char *)data; | |
2103 | stream.avail_in = size; | |
2104 | while (git_deflate(&stream, Z_FINISH) == Z_OK) | |
2105 | ; /* nothing */ | |
2106 | git_deflate_end(&stream); | |
2107 | *result_size = stream.total_out; | |
2108 | return deflated; | |
2109 | } | |
2110 | ||
2111 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, | |
2112 | const char *prefix) | |
2113 | { | |
2114 | void *cp; | |
2115 | void *delta; | |
2116 | void *deflated; | |
2117 | void *data; | |
2118 | unsigned long orig_size; | |
2119 | unsigned long delta_size; | |
2120 | unsigned long deflate_size; | |
2121 | unsigned long data_size; | |
2122 | ||
2123 | /* We could do deflated delta, or we could do just deflated two, | |
2124 | * whichever is smaller. | |
2125 | */ | |
2126 | delta = NULL; | |
2127 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
2128 | if (one->size && two->size) { | |
2129 | delta = diff_delta(one->ptr, one->size, | |
2130 | two->ptr, two->size, | |
2131 | &delta_size, deflate_size); | |
2132 | if (delta) { | |
2133 | void *to_free = delta; | |
2134 | orig_size = delta_size; | |
2135 | delta = deflate_it(delta, delta_size, &delta_size); | |
2136 | free(to_free); | |
2137 | } | |
2138 | } | |
2139 | ||
2140 | if (delta && delta_size < deflate_size) { | |
2141 | fprintf(file, "%sdelta %lu\n", prefix, orig_size); | |
2142 | free(deflated); | |
2143 | data = delta; | |
2144 | data_size = delta_size; | |
2145 | } | |
2146 | else { | |
2147 | fprintf(file, "%sliteral %lu\n", prefix, two->size); | |
2148 | free(delta); | |
2149 | data = deflated; | |
2150 | data_size = deflate_size; | |
2151 | } | |
2152 | ||
2153 | /* emit data encoded in base85 */ | |
2154 | cp = data; | |
2155 | while (data_size) { | |
2156 | int bytes = (52 < data_size) ? 52 : data_size; | |
2157 | char line[70]; | |
2158 | data_size -= bytes; | |
2159 | if (bytes <= 26) | |
2160 | line[0] = bytes + 'A' - 1; | |
2161 | else | |
2162 | line[0] = bytes - 26 + 'a' - 1; | |
2163 | encode_85(line + 1, cp, bytes); | |
2164 | cp = (char *) cp + bytes; | |
2165 | fprintf(file, "%s", prefix); | |
2166 | fputs(line, file); | |
2167 | fputc('\n', file); | |
2168 | } | |
2169 | fprintf(file, "%s\n", prefix); | |
2170 | free(data); | |
2171 | } | |
2172 | ||
2173 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, | |
2174 | const char *prefix) | |
2175 | { | |
2176 | fprintf(file, "%sGIT binary patch\n", prefix); | |
2177 | emit_binary_diff_body(file, one, two, prefix); | |
2178 | emit_binary_diff_body(file, two, one, prefix); | |
2179 | } | |
2180 | ||
2181 | int diff_filespec_is_binary(struct diff_filespec *one) | |
2182 | { | |
2183 | if (one->is_binary == -1) { | |
2184 | diff_filespec_load_driver(one); | |
2185 | if (one->driver->binary != -1) | |
2186 | one->is_binary = one->driver->binary; | |
2187 | else { | |
2188 | if (!one->data && DIFF_FILE_VALID(one)) | |
2189 | diff_populate_filespec(one, CHECK_BINARY); | |
2190 | if (one->is_binary == -1 && one->data) | |
2191 | one->is_binary = buffer_is_binary(one->data, | |
2192 | one->size); | |
2193 | if (one->is_binary == -1) | |
2194 | one->is_binary = 0; | |
2195 | } | |
2196 | } | |
2197 | return one->is_binary; | |
2198 | } | |
2199 | ||
2200 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) | |
2201 | { | |
2202 | diff_filespec_load_driver(one); | |
2203 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
2204 | } | |
2205 | ||
2206 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) | |
2207 | { | |
2208 | if (!options->a_prefix) | |
2209 | options->a_prefix = a; | |
2210 | if (!options->b_prefix) | |
2211 | options->b_prefix = b; | |
2212 | } | |
2213 | ||
2214 | struct userdiff_driver *get_textconv(struct diff_filespec *one) | |
2215 | { | |
2216 | if (!DIFF_FILE_VALID(one)) | |
2217 | return NULL; | |
2218 | ||
2219 | diff_filespec_load_driver(one); | |
2220 | return userdiff_get_textconv(one->driver); | |
2221 | } | |
2222 | ||
2223 | static void builtin_diff(const char *name_a, | |
2224 | const char *name_b, | |
2225 | struct diff_filespec *one, | |
2226 | struct diff_filespec *two, | |
2227 | const char *xfrm_msg, | |
2228 | int must_show_header, | |
2229 | struct diff_options *o, | |
2230 | int complete_rewrite) | |
2231 | { | |
2232 | mmfile_t mf1, mf2; | |
2233 | const char *lbl[2]; | |
2234 | char *a_one, *b_two; | |
2235 | const char *meta = diff_get_color_opt(o, DIFF_METAINFO); | |
2236 | const char *reset = diff_get_color_opt(o, DIFF_RESET); | |
2237 | const char *a_prefix, *b_prefix; | |
2238 | struct userdiff_driver *textconv_one = NULL; | |
2239 | struct userdiff_driver *textconv_two = NULL; | |
2240 | struct strbuf header = STRBUF_INIT; | |
2241 | const char *line_prefix = diff_line_prefix(o); | |
2242 | ||
2243 | if (DIFF_OPT_TST(o, SUBMODULE_LOG) && | |
2244 | (!one->mode || S_ISGITLINK(one->mode)) && | |
2245 | (!two->mode || S_ISGITLINK(two->mode))) { | |
2246 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2247 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
2248 | show_submodule_summary(o->file, one->path ? one->path : two->path, | |
2249 | line_prefix, | |
2250 | one->sha1, two->sha1, two->dirty_submodule, | |
2251 | meta, del, add, reset); | |
2252 | return; | |
2253 | } | |
2254 | ||
2255 | if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { | |
2256 | textconv_one = get_textconv(one); | |
2257 | textconv_two = get_textconv(two); | |
2258 | } | |
2259 | ||
2260 | diff_set_mnemonic_prefix(o, "a/", "b/"); | |
2261 | if (DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
2262 | a_prefix = o->b_prefix; | |
2263 | b_prefix = o->a_prefix; | |
2264 | } else { | |
2265 | a_prefix = o->a_prefix; | |
2266 | b_prefix = o->b_prefix; | |
2267 | } | |
2268 | ||
2269 | /* Never use a non-valid filename anywhere if at all possible */ | |
2270 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
2271 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
2272 | ||
2273 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); | |
2274 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
2275 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; | |
2276 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
2277 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, meta, a_one, b_two, reset); | |
2278 | if (lbl[0][0] == '/') { | |
2279 | /* /dev/null */ | |
2280 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, meta, two->mode, reset); | |
2281 | if (xfrm_msg) | |
2282 | strbuf_addstr(&header, xfrm_msg); | |
2283 | must_show_header = 1; | |
2284 | } | |
2285 | else if (lbl[1][0] == '/') { | |
2286 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, meta, one->mode, reset); | |
2287 | if (xfrm_msg) | |
2288 | strbuf_addstr(&header, xfrm_msg); | |
2289 | must_show_header = 1; | |
2290 | } | |
2291 | else { | |
2292 | if (one->mode != two->mode) { | |
2293 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, meta, one->mode, reset); | |
2294 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, meta, two->mode, reset); | |
2295 | must_show_header = 1; | |
2296 | } | |
2297 | if (xfrm_msg) | |
2298 | strbuf_addstr(&header, xfrm_msg); | |
2299 | ||
2300 | /* | |
2301 | * we do not run diff between different kind | |
2302 | * of objects. | |
2303 | */ | |
2304 | if ((one->mode ^ two->mode) & S_IFMT) | |
2305 | goto free_ab_and_return; | |
2306 | if (complete_rewrite && | |
2307 | (textconv_one || !diff_filespec_is_binary(one)) && | |
2308 | (textconv_two || !diff_filespec_is_binary(two))) { | |
2309 | fprintf(o->file, "%s", header.buf); | |
2310 | strbuf_reset(&header); | |
2311 | emit_rewrite_diff(name_a, name_b, one, two, | |
2312 | textconv_one, textconv_two, o); | |
2313 | o->found_changes = 1; | |
2314 | goto free_ab_and_return; | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | if (o->irreversible_delete && lbl[1][0] == '/') { | |
2319 | fprintf(o->file, "%s", header.buf); | |
2320 | strbuf_reset(&header); | |
2321 | goto free_ab_and_return; | |
2322 | } else if (!DIFF_OPT_TST(o, TEXT) && | |
2323 | ( (!textconv_one && diff_filespec_is_binary(one)) || | |
2324 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
2325 | if (!one->data && !two->data && | |
2326 | S_ISREG(one->mode) && S_ISREG(two->mode) && | |
2327 | !DIFF_OPT_TST(o, BINARY)) { | |
2328 | if (!hashcmp(one->sha1, two->sha1)) { | |
2329 | if (must_show_header) | |
2330 | fprintf(o->file, "%s", header.buf); | |
2331 | goto free_ab_and_return; | |
2332 | } | |
2333 | fprintf(o->file, "%s", header.buf); | |
2334 | fprintf(o->file, "%sBinary files %s and %s differ\n", | |
2335 | line_prefix, lbl[0], lbl[1]); | |
2336 | goto free_ab_and_return; | |
2337 | } | |
2338 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2339 | die("unable to read files to diff"); | |
2340 | /* Quite common confusing case */ | |
2341 | if (mf1.size == mf2.size && | |
2342 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { | |
2343 | if (must_show_header) | |
2344 | fprintf(o->file, "%s", header.buf); | |
2345 | goto free_ab_and_return; | |
2346 | } | |
2347 | fprintf(o->file, "%s", header.buf); | |
2348 | strbuf_reset(&header); | |
2349 | if (DIFF_OPT_TST(o, BINARY)) | |
2350 | emit_binary_diff(o->file, &mf1, &mf2, line_prefix); | |
2351 | else | |
2352 | fprintf(o->file, "%sBinary files %s and %s differ\n", | |
2353 | line_prefix, lbl[0], lbl[1]); | |
2354 | o->found_changes = 1; | |
2355 | } else { | |
2356 | /* Crazy xdl interfaces.. */ | |
2357 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
2358 | const char *v; | |
2359 | xpparam_t xpp; | |
2360 | xdemitconf_t xecfg; | |
2361 | struct emit_callback ecbdata; | |
2362 | const struct userdiff_funcname *pe; | |
2363 | ||
2364 | if (must_show_header) { | |
2365 | fprintf(o->file, "%s", header.buf); | |
2366 | strbuf_reset(&header); | |
2367 | } | |
2368 | ||
2369 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); | |
2370 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
2371 | ||
2372 | pe = diff_funcname_pattern(one); | |
2373 | if (!pe) | |
2374 | pe = diff_funcname_pattern(two); | |
2375 | ||
2376 | memset(&xpp, 0, sizeof(xpp)); | |
2377 | memset(&xecfg, 0, sizeof(xecfg)); | |
2378 | memset(&ecbdata, 0, sizeof(ecbdata)); | |
2379 | ecbdata.label_path = lbl; | |
2380 | ecbdata.color_diff = want_color(o->use_color); | |
2381 | ecbdata.found_changesp = &o->found_changes; | |
2382 | ecbdata.ws_rule = whitespace_rule(name_b); | |
2383 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) | |
2384 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
2385 | ecbdata.opt = o; | |
2386 | ecbdata.header = header.len ? &header : NULL; | |
2387 | xpp.flags = o->xdl_opts; | |
2388 | xecfg.ctxlen = o->context; | |
2389 | xecfg.interhunkctxlen = o->interhunkcontext; | |
2390 | xecfg.flags = XDL_EMIT_FUNCNAMES; | |
2391 | if (DIFF_OPT_TST(o, FUNCCONTEXT)) | |
2392 | xecfg.flags |= XDL_EMIT_FUNCCONTEXT; | |
2393 | if (pe) | |
2394 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); | |
2395 | if (!diffopts) | |
2396 | ; | |
2397 | else if (skip_prefix(diffopts, "--unified=", &v)) | |
2398 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
2399 | else if (skip_prefix(diffopts, "-u", &v)) | |
2400 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
2401 | if (o->word_diff) | |
2402 | init_diff_words_data(&ecbdata, o, one, two); | |
2403 | xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, | |
2404 | &xpp, &xecfg); | |
2405 | if (o->word_diff) | |
2406 | free_diff_words_data(&ecbdata); | |
2407 | if (textconv_one) | |
2408 | free(mf1.ptr); | |
2409 | if (textconv_two) | |
2410 | free(mf2.ptr); | |
2411 | xdiff_clear_find_func(&xecfg); | |
2412 | } | |
2413 | ||
2414 | free_ab_and_return: | |
2415 | strbuf_release(&header); | |
2416 | diff_free_filespec_data(one); | |
2417 | diff_free_filespec_data(two); | |
2418 | free(a_one); | |
2419 | free(b_two); | |
2420 | return; | |
2421 | } | |
2422 | ||
2423 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
2424 | struct diff_filespec *one, | |
2425 | struct diff_filespec *two, | |
2426 | struct diffstat_t *diffstat, | |
2427 | struct diff_options *o, | |
2428 | struct diff_filepair *p) | |
2429 | { | |
2430 | mmfile_t mf1, mf2; | |
2431 | struct diffstat_file *data; | |
2432 | int same_contents; | |
2433 | int complete_rewrite = 0; | |
2434 | ||
2435 | if (!DIFF_PAIR_UNMERGED(p)) { | |
2436 | if (p->status == DIFF_STATUS_MODIFIED && p->score) | |
2437 | complete_rewrite = 1; | |
2438 | } | |
2439 | ||
2440 | data = diffstat_add(diffstat, name_a, name_b); | |
2441 | data->is_interesting = p->status != DIFF_STATUS_UNKNOWN; | |
2442 | ||
2443 | if (!one || !two) { | |
2444 | data->is_unmerged = 1; | |
2445 | return; | |
2446 | } | |
2447 | ||
2448 | same_contents = !hashcmp(one->sha1, two->sha1); | |
2449 | ||
2450 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { | |
2451 | data->is_binary = 1; | |
2452 | if (same_contents) { | |
2453 | data->added = 0; | |
2454 | data->deleted = 0; | |
2455 | } else { | |
2456 | data->added = diff_filespec_size(two); | |
2457 | data->deleted = diff_filespec_size(one); | |
2458 | } | |
2459 | } | |
2460 | ||
2461 | else if (complete_rewrite) { | |
2462 | diff_populate_filespec(one, 0); | |
2463 | diff_populate_filespec(two, 0); | |
2464 | data->deleted = count_lines(one->data, one->size); | |
2465 | data->added = count_lines(two->data, two->size); | |
2466 | } | |
2467 | ||
2468 | else if (!same_contents) { | |
2469 | /* Crazy xdl interfaces.. */ | |
2470 | xpparam_t xpp; | |
2471 | xdemitconf_t xecfg; | |
2472 | ||
2473 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2474 | die("unable to read files to diff"); | |
2475 | ||
2476 | memset(&xpp, 0, sizeof(xpp)); | |
2477 | memset(&xecfg, 0, sizeof(xecfg)); | |
2478 | xpp.flags = o->xdl_opts; | |
2479 | xecfg.ctxlen = o->context; | |
2480 | xecfg.interhunkctxlen = o->interhunkcontext; | |
2481 | xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, | |
2482 | &xpp, &xecfg); | |
2483 | } | |
2484 | ||
2485 | diff_free_filespec_data(one); | |
2486 | diff_free_filespec_data(two); | |
2487 | } | |
2488 | ||
2489 | static void builtin_checkdiff(const char *name_a, const char *name_b, | |
2490 | const char *attr_path, | |
2491 | struct diff_filespec *one, | |
2492 | struct diff_filespec *two, | |
2493 | struct diff_options *o) | |
2494 | { | |
2495 | mmfile_t mf1, mf2; | |
2496 | struct checkdiff_t data; | |
2497 | ||
2498 | if (!two) | |
2499 | return; | |
2500 | ||
2501 | memset(&data, 0, sizeof(data)); | |
2502 | data.filename = name_b ? name_b : name_a; | |
2503 | data.lineno = 0; | |
2504 | data.o = o; | |
2505 | data.ws_rule = whitespace_rule(attr_path); | |
2506 | data.conflict_marker_size = ll_merge_marker_size(attr_path); | |
2507 | ||
2508 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2509 | die("unable to read files to diff"); | |
2510 | ||
2511 | /* | |
2512 | * All the other codepaths check both sides, but not checking | |
2513 | * the "old" side here is deliberate. We are checking the newly | |
2514 | * introduced changes, and as long as the "new" side is text, we | |
2515 | * can and should check what it introduces. | |
2516 | */ | |
2517 | if (diff_filespec_is_binary(two)) | |
2518 | goto free_and_return; | |
2519 | else { | |
2520 | /* Crazy xdl interfaces.. */ | |
2521 | xpparam_t xpp; | |
2522 | xdemitconf_t xecfg; | |
2523 | ||
2524 | memset(&xpp, 0, sizeof(xpp)); | |
2525 | memset(&xecfg, 0, sizeof(xecfg)); | |
2526 | xecfg.ctxlen = 1; /* at least one context line */ | |
2527 | xpp.flags = 0; | |
2528 | xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, | |
2529 | &xpp, &xecfg); | |
2530 | ||
2531 | if (data.ws_rule & WS_BLANK_AT_EOF) { | |
2532 | struct emit_callback ecbdata; | |
2533 | int blank_at_eof; | |
2534 | ||
2535 | ecbdata.ws_rule = data.ws_rule; | |
2536 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
2537 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; | |
2538 | ||
2539 | if (blank_at_eof) { | |
2540 | static char *err; | |
2541 | if (!err) | |
2542 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
2543 | fprintf(o->file, "%s:%d: %s.\n", | |
2544 | data.filename, blank_at_eof, err); | |
2545 | data.status = 1; /* report errors */ | |
2546 | } | |
2547 | } | |
2548 | } | |
2549 | free_and_return: | |
2550 | diff_free_filespec_data(one); | |
2551 | diff_free_filespec_data(two); | |
2552 | if (data.status) | |
2553 | DIFF_OPT_SET(o, CHECK_FAILED); | |
2554 | } | |
2555 | ||
2556 | struct diff_filespec *alloc_filespec(const char *path) | |
2557 | { | |
2558 | int namelen = strlen(path); | |
2559 | struct diff_filespec *spec = xmalloc(sizeof(*spec) + namelen + 1); | |
2560 | ||
2561 | memset(spec, 0, sizeof(*spec)); | |
2562 | spec->path = (char *)(spec + 1); | |
2563 | memcpy(spec->path, path, namelen+1); | |
2564 | spec->count = 1; | |
2565 | spec->is_binary = -1; | |
2566 | return spec; | |
2567 | } | |
2568 | ||
2569 | void free_filespec(struct diff_filespec *spec) | |
2570 | { | |
2571 | if (!--spec->count) { | |
2572 | diff_free_filespec_data(spec); | |
2573 | free(spec); | |
2574 | } | |
2575 | } | |
2576 | ||
2577 | void fill_filespec(struct diff_filespec *spec, const unsigned char *sha1, | |
2578 | int sha1_valid, unsigned short mode) | |
2579 | { | |
2580 | if (mode) { | |
2581 | spec->mode = canon_mode(mode); | |
2582 | hashcpy(spec->sha1, sha1); | |
2583 | spec->sha1_valid = sha1_valid; | |
2584 | } | |
2585 | } | |
2586 | ||
2587 | /* | |
2588 | * Given a name and sha1 pair, if the index tells us the file in | |
2589 | * the work tree has that object contents, return true, so that | |
2590 | * prepare_temp_file() does not have to inflate and extract. | |
2591 | */ | |
2592 | static int reuse_worktree_file(const char *name, const unsigned char *sha1, int want_file) | |
2593 | { | |
2594 | const struct cache_entry *ce; | |
2595 | struct stat st; | |
2596 | int pos, len; | |
2597 | ||
2598 | /* | |
2599 | * We do not read the cache ourselves here, because the | |
2600 | * benchmark with my previous version that always reads cache | |
2601 | * shows that it makes things worse for diff-tree comparing | |
2602 | * two linux-2.6 kernel trees in an already checked out work | |
2603 | * tree. This is because most diff-tree comparisons deal with | |
2604 | * only a small number of files, while reading the cache is | |
2605 | * expensive for a large project, and its cost outweighs the | |
2606 | * savings we get by not inflating the object to a temporary | |
2607 | * file. Practically, this code only helps when we are used | |
2608 | * by diff-cache --cached, which does read the cache before | |
2609 | * calling us. | |
2610 | */ | |
2611 | if (!active_cache) | |
2612 | return 0; | |
2613 | ||
2614 | /* We want to avoid the working directory if our caller | |
2615 | * doesn't need the data in a normal file, this system | |
2616 | * is rather slow with its stat/open/mmap/close syscalls, | |
2617 | * and the object is contained in a pack file. The pack | |
2618 | * is probably already open and will be faster to obtain | |
2619 | * the data through than the working directory. Loose | |
2620 | * objects however would tend to be slower as they need | |
2621 | * to be individually opened and inflated. | |
2622 | */ | |
2623 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(sha1)) | |
2624 | return 0; | |
2625 | ||
2626 | len = strlen(name); | |
2627 | pos = cache_name_pos(name, len); | |
2628 | if (pos < 0) | |
2629 | return 0; | |
2630 | ce = active_cache[pos]; | |
2631 | ||
2632 | /* | |
2633 | * This is not the sha1 we are looking for, or | |
2634 | * unreusable because it is not a regular file. | |
2635 | */ | |
2636 | if (hashcmp(sha1, ce->sha1) || !S_ISREG(ce->ce_mode)) | |
2637 | return 0; | |
2638 | ||
2639 | /* | |
2640 | * If ce is marked as "assume unchanged", there is no | |
2641 | * guarantee that work tree matches what we are looking for. | |
2642 | */ | |
2643 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) | |
2644 | return 0; | |
2645 | ||
2646 | /* | |
2647 | * If ce matches the file in the work tree, we can reuse it. | |
2648 | */ | |
2649 | if (ce_uptodate(ce) || | |
2650 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
2651 | return 1; | |
2652 | ||
2653 | return 0; | |
2654 | } | |
2655 | ||
2656 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) | |
2657 | { | |
2658 | int len; | |
2659 | char *data = xmalloc(100), *dirty = ""; | |
2660 | ||
2661 | /* Are we looking at the work tree? */ | |
2662 | if (s->dirty_submodule) | |
2663 | dirty = "-dirty"; | |
2664 | ||
2665 | len = snprintf(data, 100, | |
2666 | "Subproject commit %s%s\n", sha1_to_hex(s->sha1), dirty); | |
2667 | s->data = data; | |
2668 | s->size = len; | |
2669 | s->should_free = 1; | |
2670 | if (size_only) { | |
2671 | s->data = NULL; | |
2672 | free(data); | |
2673 | } | |
2674 | return 0; | |
2675 | } | |
2676 | ||
2677 | /* | |
2678 | * While doing rename detection and pickaxe operation, we may need to | |
2679 | * grab the data for the blob (or file) for our own in-core comparison. | |
2680 | * diff_filespec has data and size fields for this purpose. | |
2681 | */ | |
2682 | int diff_populate_filespec(struct diff_filespec *s, unsigned int flags) | |
2683 | { | |
2684 | int size_only = flags & CHECK_SIZE_ONLY; | |
2685 | int err = 0; | |
2686 | /* | |
2687 | * demote FAIL to WARN to allow inspecting the situation | |
2688 | * instead of refusing. | |
2689 | */ | |
2690 | enum safe_crlf crlf_warn = (safe_crlf == SAFE_CRLF_FAIL | |
2691 | ? SAFE_CRLF_WARN | |
2692 | : safe_crlf); | |
2693 | ||
2694 | if (!DIFF_FILE_VALID(s)) | |
2695 | die("internal error: asking to populate invalid file."); | |
2696 | if (S_ISDIR(s->mode)) | |
2697 | return -1; | |
2698 | ||
2699 | if (s->data) | |
2700 | return 0; | |
2701 | ||
2702 | if (size_only && 0 < s->size) | |
2703 | return 0; | |
2704 | ||
2705 | if (S_ISGITLINK(s->mode)) | |
2706 | return diff_populate_gitlink(s, size_only); | |
2707 | ||
2708 | if (!s->sha1_valid || | |
2709 | reuse_worktree_file(s->path, s->sha1, 0)) { | |
2710 | struct strbuf buf = STRBUF_INIT; | |
2711 | struct stat st; | |
2712 | int fd; | |
2713 | ||
2714 | if (lstat(s->path, &st) < 0) { | |
2715 | if (errno == ENOENT) { | |
2716 | err_empty: | |
2717 | err = -1; | |
2718 | empty: | |
2719 | s->data = (char *)""; | |
2720 | s->size = 0; | |
2721 | return err; | |
2722 | } | |
2723 | } | |
2724 | s->size = xsize_t(st.st_size); | |
2725 | if (!s->size) | |
2726 | goto empty; | |
2727 | if (S_ISLNK(st.st_mode)) { | |
2728 | struct strbuf sb = STRBUF_INIT; | |
2729 | ||
2730 | if (strbuf_readlink(&sb, s->path, s->size)) | |
2731 | goto err_empty; | |
2732 | s->size = sb.len; | |
2733 | s->data = strbuf_detach(&sb, NULL); | |
2734 | s->should_free = 1; | |
2735 | return 0; | |
2736 | } | |
2737 | if (size_only) | |
2738 | return 0; | |
2739 | if ((flags & CHECK_BINARY) && | |
2740 | s->size > big_file_threshold && s->is_binary == -1) { | |
2741 | s->is_binary = 1; | |
2742 | return 0; | |
2743 | } | |
2744 | fd = open(s->path, O_RDONLY); | |
2745 | if (fd < 0) | |
2746 | goto err_empty; | |
2747 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); | |
2748 | close(fd); | |
2749 | s->should_munmap = 1; | |
2750 | ||
2751 | /* | |
2752 | * Convert from working tree format to canonical git format | |
2753 | */ | |
2754 | if (convert_to_git(s->path, s->data, s->size, &buf, crlf_warn)) { | |
2755 | size_t size = 0; | |
2756 | munmap(s->data, s->size); | |
2757 | s->should_munmap = 0; | |
2758 | s->data = strbuf_detach(&buf, &size); | |
2759 | s->size = size; | |
2760 | s->should_free = 1; | |
2761 | } | |
2762 | } | |
2763 | else { | |
2764 | enum object_type type; | |
2765 | if (size_only || (flags & CHECK_BINARY)) { | |
2766 | type = sha1_object_info(s->sha1, &s->size); | |
2767 | if (type < 0) | |
2768 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
2769 | if (size_only) | |
2770 | return 0; | |
2771 | if (s->size > big_file_threshold && s->is_binary == -1) { | |
2772 | s->is_binary = 1; | |
2773 | return 0; | |
2774 | } | |
2775 | } | |
2776 | s->data = read_sha1_file(s->sha1, &type, &s->size); | |
2777 | if (!s->data) | |
2778 | die("unable to read %s", sha1_to_hex(s->sha1)); | |
2779 | s->should_free = 1; | |
2780 | } | |
2781 | return 0; | |
2782 | } | |
2783 | ||
2784 | void diff_free_filespec_blob(struct diff_filespec *s) | |
2785 | { | |
2786 | if (s->should_free) | |
2787 | free(s->data); | |
2788 | else if (s->should_munmap) | |
2789 | munmap(s->data, s->size); | |
2790 | ||
2791 | if (s->should_free || s->should_munmap) { | |
2792 | s->should_free = s->should_munmap = 0; | |
2793 | s->data = NULL; | |
2794 | } | |
2795 | } | |
2796 | ||
2797 | void diff_free_filespec_data(struct diff_filespec *s) | |
2798 | { | |
2799 | diff_free_filespec_blob(s); | |
2800 | free(s->cnt_data); | |
2801 | s->cnt_data = NULL; | |
2802 | } | |
2803 | ||
2804 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, | |
2805 | void *blob, | |
2806 | unsigned long size, | |
2807 | const unsigned char *sha1, | |
2808 | int mode) | |
2809 | { | |
2810 | int fd; | |
2811 | struct strbuf buf = STRBUF_INIT; | |
2812 | struct strbuf template = STRBUF_INIT; | |
2813 | char *path_dup = xstrdup(path); | |
2814 | const char *base = basename(path_dup); | |
2815 | ||
2816 | /* Generate "XXXXXX_basename.ext" */ | |
2817 | strbuf_addstr(&template, "XXXXXX_"); | |
2818 | strbuf_addstr(&template, base); | |
2819 | ||
2820 | fd = git_mkstemps(temp->tmp_path, PATH_MAX, template.buf, | |
2821 | strlen(base) + 1); | |
2822 | if (fd < 0) | |
2823 | die_errno("unable to create temp-file"); | |
2824 | if (convert_to_working_tree(path, | |
2825 | (const char *)blob, (size_t)size, &buf)) { | |
2826 | blob = buf.buf; | |
2827 | size = buf.len; | |
2828 | } | |
2829 | if (write_in_full(fd, blob, size) != size) | |
2830 | die_errno("unable to write temp-file"); | |
2831 | close(fd); | |
2832 | temp->name = temp->tmp_path; | |
2833 | strcpy(temp->hex, sha1_to_hex(sha1)); | |
2834 | temp->hex[40] = 0; | |
2835 | sprintf(temp->mode, "%06o", mode); | |
2836 | strbuf_release(&buf); | |
2837 | strbuf_release(&template); | |
2838 | free(path_dup); | |
2839 | } | |
2840 | ||
2841 | static struct diff_tempfile *prepare_temp_file(const char *name, | |
2842 | struct diff_filespec *one) | |
2843 | { | |
2844 | struct diff_tempfile *temp = claim_diff_tempfile(); | |
2845 | ||
2846 | if (!DIFF_FILE_VALID(one)) { | |
2847 | not_a_valid_file: | |
2848 | /* A '-' entry produces this for file-2, and | |
2849 | * a '+' entry produces this for file-1. | |
2850 | */ | |
2851 | temp->name = "/dev/null"; | |
2852 | strcpy(temp->hex, "."); | |
2853 | strcpy(temp->mode, "."); | |
2854 | return temp; | |
2855 | } | |
2856 | ||
2857 | if (!remove_tempfile_installed) { | |
2858 | atexit(remove_tempfile); | |
2859 | sigchain_push_common(remove_tempfile_on_signal); | |
2860 | remove_tempfile_installed = 1; | |
2861 | } | |
2862 | ||
2863 | if (!S_ISGITLINK(one->mode) && | |
2864 | (!one->sha1_valid || | |
2865 | reuse_worktree_file(name, one->sha1, 1))) { | |
2866 | struct stat st; | |
2867 | if (lstat(name, &st) < 0) { | |
2868 | if (errno == ENOENT) | |
2869 | goto not_a_valid_file; | |
2870 | die_errno("stat(%s)", name); | |
2871 | } | |
2872 | if (S_ISLNK(st.st_mode)) { | |
2873 | struct strbuf sb = STRBUF_INIT; | |
2874 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
2875 | die_errno("readlink(%s)", name); | |
2876 | prep_temp_blob(name, temp, sb.buf, sb.len, | |
2877 | (one->sha1_valid ? | |
2878 | one->sha1 : null_sha1), | |
2879 | (one->sha1_valid ? | |
2880 | one->mode : S_IFLNK)); | |
2881 | strbuf_release(&sb); | |
2882 | } | |
2883 | else { | |
2884 | /* we can borrow from the file in the work tree */ | |
2885 | temp->name = name; | |
2886 | if (!one->sha1_valid) | |
2887 | strcpy(temp->hex, sha1_to_hex(null_sha1)); | |
2888 | else | |
2889 | strcpy(temp->hex, sha1_to_hex(one->sha1)); | |
2890 | /* Even though we may sometimes borrow the | |
2891 | * contents from the work tree, we always want | |
2892 | * one->mode. mode is trustworthy even when | |
2893 | * !(one->sha1_valid), as long as | |
2894 | * DIFF_FILE_VALID(one). | |
2895 | */ | |
2896 | sprintf(temp->mode, "%06o", one->mode); | |
2897 | } | |
2898 | return temp; | |
2899 | } | |
2900 | else { | |
2901 | if (diff_populate_filespec(one, 0)) | |
2902 | die("cannot read data blob for %s", one->path); | |
2903 | prep_temp_blob(name, temp, one->data, one->size, | |
2904 | one->sha1, one->mode); | |
2905 | } | |
2906 | return temp; | |
2907 | } | |
2908 | ||
2909 | static void add_external_diff_name(struct argv_array *argv, | |
2910 | const char *name, | |
2911 | struct diff_filespec *df) | |
2912 | { | |
2913 | struct diff_tempfile *temp = prepare_temp_file(name, df); | |
2914 | argv_array_push(argv, temp->name); | |
2915 | argv_array_push(argv, temp->hex); | |
2916 | argv_array_push(argv, temp->mode); | |
2917 | } | |
2918 | ||
2919 | /* An external diff command takes: | |
2920 | * | |
2921 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
2922 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
2923 | * | |
2924 | */ | |
2925 | static void run_external_diff(const char *pgm, | |
2926 | const char *name, | |
2927 | const char *other, | |
2928 | struct diff_filespec *one, | |
2929 | struct diff_filespec *two, | |
2930 | const char *xfrm_msg, | |
2931 | int complete_rewrite, | |
2932 | struct diff_options *o) | |
2933 | { | |
2934 | struct argv_array argv = ARGV_ARRAY_INIT; | |
2935 | struct argv_array env = ARGV_ARRAY_INIT; | |
2936 | struct diff_queue_struct *q = &diff_queued_diff; | |
2937 | ||
2938 | argv_array_push(&argv, pgm); | |
2939 | argv_array_push(&argv, name); | |
2940 | ||
2941 | if (one && two) { | |
2942 | add_external_diff_name(&argv, name, one); | |
2943 | if (!other) | |
2944 | add_external_diff_name(&argv, name, two); | |
2945 | else { | |
2946 | add_external_diff_name(&argv, other, two); | |
2947 | argv_array_push(&argv, other); | |
2948 | argv_array_push(&argv, xfrm_msg); | |
2949 | } | |
2950 | } | |
2951 | ||
2952 | argv_array_pushf(&env, "GIT_DIFF_PATH_COUNTER=%d", ++o->diff_path_counter); | |
2953 | argv_array_pushf(&env, "GIT_DIFF_PATH_TOTAL=%d", q->nr); | |
2954 | ||
2955 | if (run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env.argv)) | |
2956 | die(_("external diff died, stopping at %s"), name); | |
2957 | ||
2958 | remove_tempfile(); | |
2959 | argv_array_clear(&argv); | |
2960 | argv_array_clear(&env); | |
2961 | } | |
2962 | ||
2963 | static int similarity_index(struct diff_filepair *p) | |
2964 | { | |
2965 | return p->score * 100 / MAX_SCORE; | |
2966 | } | |
2967 | ||
2968 | static void fill_metainfo(struct strbuf *msg, | |
2969 | const char *name, | |
2970 | const char *other, | |
2971 | struct diff_filespec *one, | |
2972 | struct diff_filespec *two, | |
2973 | struct diff_options *o, | |
2974 | struct diff_filepair *p, | |
2975 | int *must_show_header, | |
2976 | int use_color) | |
2977 | { | |
2978 | const char *set = diff_get_color(use_color, DIFF_METAINFO); | |
2979 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
2980 | const char *line_prefix = diff_line_prefix(o); | |
2981 | ||
2982 | *must_show_header = 1; | |
2983 | strbuf_init(msg, PATH_MAX * 2 + 300); | |
2984 | switch (p->status) { | |
2985 | case DIFF_STATUS_COPIED: | |
2986 | strbuf_addf(msg, "%s%ssimilarity index %d%%", | |
2987 | line_prefix, set, similarity_index(p)); | |
2988 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
2989 | reset, line_prefix, set); | |
2990 | quote_c_style(name, msg, NULL, 0); | |
2991 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); | |
2992 | quote_c_style(other, msg, NULL, 0); | |
2993 | strbuf_addf(msg, "%s\n", reset); | |
2994 | break; | |
2995 | case DIFF_STATUS_RENAMED: | |
2996 | strbuf_addf(msg, "%s%ssimilarity index %d%%", | |
2997 | line_prefix, set, similarity_index(p)); | |
2998 | strbuf_addf(msg, "%s\n%s%srename from ", | |
2999 | reset, line_prefix, set); | |
3000 | quote_c_style(name, msg, NULL, 0); | |
3001 | strbuf_addf(msg, "%s\n%s%srename to ", | |
3002 | reset, line_prefix, set); | |
3003 | quote_c_style(other, msg, NULL, 0); | |
3004 | strbuf_addf(msg, "%s\n", reset); | |
3005 | break; | |
3006 | case DIFF_STATUS_MODIFIED: | |
3007 | if (p->score) { | |
3008 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", | |
3009 | line_prefix, | |
3010 | set, similarity_index(p), reset); | |
3011 | break; | |
3012 | } | |
3013 | /* fallthru */ | |
3014 | default: | |
3015 | *must_show_header = 0; | |
3016 | } | |
3017 | if (one && two && hashcmp(one->sha1, two->sha1)) { | |
3018 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; | |
3019 | ||
3020 | if (DIFF_OPT_TST(o, BINARY)) { | |
3021 | mmfile_t mf; | |
3022 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
3023 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
3024 | abbrev = 40; | |
3025 | } | |
3026 | strbuf_addf(msg, "%s%sindex %s..", line_prefix, set, | |
3027 | find_unique_abbrev(one->sha1, abbrev)); | |
3028 | strbuf_addstr(msg, find_unique_abbrev(two->sha1, abbrev)); | |
3029 | if (one->mode == two->mode) | |
3030 | strbuf_addf(msg, " %06o", one->mode); | |
3031 | strbuf_addf(msg, "%s\n", reset); | |
3032 | } | |
3033 | } | |
3034 | ||
3035 | static void run_diff_cmd(const char *pgm, | |
3036 | const char *name, | |
3037 | const char *other, | |
3038 | const char *attr_path, | |
3039 | struct diff_filespec *one, | |
3040 | struct diff_filespec *two, | |
3041 | struct strbuf *msg, | |
3042 | struct diff_options *o, | |
3043 | struct diff_filepair *p) | |
3044 | { | |
3045 | const char *xfrm_msg = NULL; | |
3046 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
3047 | int must_show_header = 0; | |
3048 | ||
3049 | ||
3050 | if (DIFF_OPT_TST(o, ALLOW_EXTERNAL)) { | |
3051 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); | |
3052 | if (drv && drv->external) | |
3053 | pgm = drv->external; | |
3054 | } | |
3055 | ||
3056 | if (msg) { | |
3057 | /* | |
3058 | * don't use colors when the header is intended for an | |
3059 | * external diff driver | |
3060 | */ | |
3061 | fill_metainfo(msg, name, other, one, two, o, p, | |
3062 | &must_show_header, | |
3063 | want_color(o->use_color) && !pgm); | |
3064 | xfrm_msg = msg->len ? msg->buf : NULL; | |
3065 | } | |
3066 | ||
3067 | if (pgm) { | |
3068 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
3069 | complete_rewrite, o); | |
3070 | return; | |
3071 | } | |
3072 | if (one && two) | |
3073 | builtin_diff(name, other ? other : name, | |
3074 | one, two, xfrm_msg, must_show_header, | |
3075 | o, complete_rewrite); | |
3076 | else | |
3077 | fprintf(o->file, "* Unmerged path %s\n", name); | |
3078 | } | |
3079 | ||
3080 | static void diff_fill_sha1_info(struct diff_filespec *one) | |
3081 | { | |
3082 | if (DIFF_FILE_VALID(one)) { | |
3083 | if (!one->sha1_valid) { | |
3084 | struct stat st; | |
3085 | if (one->is_stdin) { | |
3086 | hashcpy(one->sha1, null_sha1); | |
3087 | return; | |
3088 | } | |
3089 | if (lstat(one->path, &st) < 0) | |
3090 | die_errno("stat '%s'", one->path); | |
3091 | if (index_path(one->sha1, one->path, &st, 0)) | |
3092 | die("cannot hash %s", one->path); | |
3093 | } | |
3094 | } | |
3095 | else | |
3096 | hashclr(one->sha1); | |
3097 | } | |
3098 | ||
3099 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) | |
3100 | { | |
3101 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
3102 | if (*namep && **namep != '/') { | |
3103 | *namep += prefix_length; | |
3104 | if (**namep == '/') | |
3105 | ++*namep; | |
3106 | } | |
3107 | if (*otherp && **otherp != '/') { | |
3108 | *otherp += prefix_length; | |
3109 | if (**otherp == '/') | |
3110 | ++*otherp; | |
3111 | } | |
3112 | } | |
3113 | ||
3114 | static void run_diff(struct diff_filepair *p, struct diff_options *o) | |
3115 | { | |
3116 | const char *pgm = external_diff(); | |
3117 | struct strbuf msg; | |
3118 | struct diff_filespec *one = p->one; | |
3119 | struct diff_filespec *two = p->two; | |
3120 | const char *name; | |
3121 | const char *other; | |
3122 | const char *attr_path; | |
3123 | ||
3124 | name = p->one->path; | |
3125 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3126 | attr_path = name; | |
3127 | if (o->prefix_length) | |
3128 | strip_prefix(o->prefix_length, &name, &other); | |
3129 | ||
3130 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) | |
3131 | pgm = NULL; | |
3132 | ||
3133 | if (DIFF_PAIR_UNMERGED(p)) { | |
3134 | run_diff_cmd(pgm, name, NULL, attr_path, | |
3135 | NULL, NULL, NULL, o, p); | |
3136 | return; | |
3137 | } | |
3138 | ||
3139 | diff_fill_sha1_info(one); | |
3140 | diff_fill_sha1_info(two); | |
3141 | ||
3142 | if (!pgm && | |
3143 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
3144 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
3145 | /* | |
3146 | * a filepair that changes between file and symlink | |
3147 | * needs to be split into deletion and creation. | |
3148 | */ | |
3149 | struct diff_filespec *null = alloc_filespec(two->path); | |
3150 | run_diff_cmd(NULL, name, other, attr_path, | |
3151 | one, null, &msg, o, p); | |
3152 | free(null); | |
3153 | strbuf_release(&msg); | |
3154 | ||
3155 | null = alloc_filespec(one->path); | |
3156 | run_diff_cmd(NULL, name, other, attr_path, | |
3157 | null, two, &msg, o, p); | |
3158 | free(null); | |
3159 | } | |
3160 | else | |
3161 | run_diff_cmd(pgm, name, other, attr_path, | |
3162 | one, two, &msg, o, p); | |
3163 | ||
3164 | strbuf_release(&msg); | |
3165 | } | |
3166 | ||
3167 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
3168 | struct diffstat_t *diffstat) | |
3169 | { | |
3170 | const char *name; | |
3171 | const char *other; | |
3172 | ||
3173 | if (DIFF_PAIR_UNMERGED(p)) { | |
3174 | /* unmerged */ | |
3175 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, p); | |
3176 | return; | |
3177 | } | |
3178 | ||
3179 | name = p->one->path; | |
3180 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3181 | ||
3182 | if (o->prefix_length) | |
3183 | strip_prefix(o->prefix_length, &name, &other); | |
3184 | ||
3185 | diff_fill_sha1_info(p->one); | |
3186 | diff_fill_sha1_info(p->two); | |
3187 | ||
3188 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, p); | |
3189 | } | |
3190 | ||
3191 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) | |
3192 | { | |
3193 | const char *name; | |
3194 | const char *other; | |
3195 | const char *attr_path; | |
3196 | ||
3197 | if (DIFF_PAIR_UNMERGED(p)) { | |
3198 | /* unmerged */ | |
3199 | return; | |
3200 | } | |
3201 | ||
3202 | name = p->one->path; | |
3203 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3204 | attr_path = other ? other : name; | |
3205 | ||
3206 | if (o->prefix_length) | |
3207 | strip_prefix(o->prefix_length, &name, &other); | |
3208 | ||
3209 | diff_fill_sha1_info(p->one); | |
3210 | diff_fill_sha1_info(p->two); | |
3211 | ||
3212 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); | |
3213 | } | |
3214 | ||
3215 | void diff_setup(struct diff_options *options) | |
3216 | { | |
3217 | memcpy(options, &default_diff_options, sizeof(*options)); | |
3218 | ||
3219 | options->file = stdout; | |
3220 | ||
3221 | options->line_termination = '\n'; | |
3222 | options->break_opt = -1; | |
3223 | options->rename_limit = -1; | |
3224 | options->dirstat_permille = diff_dirstat_permille_default; | |
3225 | options->context = diff_context_default; | |
3226 | DIFF_OPT_SET(options, RENAME_EMPTY); | |
3227 | ||
3228 | /* pathchange left =NULL by default */ | |
3229 | options->change = diff_change; | |
3230 | options->add_remove = diff_addremove; | |
3231 | options->use_color = diff_use_color_default; | |
3232 | options->detect_rename = diff_detect_rename_default; | |
3233 | options->xdl_opts |= diff_algorithm; | |
3234 | ||
3235 | options->orderfile = diff_order_file_cfg; | |
3236 | ||
3237 | if (diff_no_prefix) { | |
3238 | options->a_prefix = options->b_prefix = ""; | |
3239 | } else if (!diff_mnemonic_prefix) { | |
3240 | options->a_prefix = "a/"; | |
3241 | options->b_prefix = "b/"; | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | void diff_setup_done(struct diff_options *options) | |
3246 | { | |
3247 | int count = 0; | |
3248 | ||
3249 | if (options->set_default) | |
3250 | options->set_default(options); | |
3251 | ||
3252 | if (options->output_format & DIFF_FORMAT_NAME) | |
3253 | count++; | |
3254 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
3255 | count++; | |
3256 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
3257 | count++; | |
3258 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
3259 | count++; | |
3260 | if (count > 1) | |
3261 | die("--name-only, --name-status, --check and -s are mutually exclusive"); | |
3262 | ||
3263 | /* | |
3264 | * Most of the time we can say "there are changes" | |
3265 | * only by checking if there are changed paths, but | |
3266 | * --ignore-whitespace* options force us to look | |
3267 | * inside contents. | |
3268 | */ | |
3269 | ||
3270 | if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || | |
3271 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || | |
3272 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) | |
3273 | DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); | |
3274 | else | |
3275 | DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); | |
3276 | ||
3277 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) | |
3278 | options->detect_rename = DIFF_DETECT_COPY; | |
3279 | ||
3280 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) | |
3281 | options->prefix = NULL; | |
3282 | if (options->prefix) | |
3283 | options->prefix_length = strlen(options->prefix); | |
3284 | else | |
3285 | options->prefix_length = 0; | |
3286 | ||
3287 | if (options->output_format & (DIFF_FORMAT_NAME | | |
3288 | DIFF_FORMAT_NAME_STATUS | | |
3289 | DIFF_FORMAT_CHECKDIFF | | |
3290 | DIFF_FORMAT_NO_OUTPUT)) | |
3291 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
3292 | DIFF_FORMAT_NUMSTAT | | |
3293 | DIFF_FORMAT_DIFFSTAT | | |
3294 | DIFF_FORMAT_SHORTSTAT | | |
3295 | DIFF_FORMAT_DIRSTAT | | |
3296 | DIFF_FORMAT_SUMMARY | | |
3297 | DIFF_FORMAT_PATCH); | |
3298 | ||
3299 | /* | |
3300 | * These cases always need recursive; we do not drop caller-supplied | |
3301 | * recursive bits for other formats here. | |
3302 | */ | |
3303 | if (options->output_format & (DIFF_FORMAT_PATCH | | |
3304 | DIFF_FORMAT_NUMSTAT | | |
3305 | DIFF_FORMAT_DIFFSTAT | | |
3306 | DIFF_FORMAT_SHORTSTAT | | |
3307 | DIFF_FORMAT_DIRSTAT | | |
3308 | DIFF_FORMAT_SUMMARY | | |
3309 | DIFF_FORMAT_CHECKDIFF)) | |
3310 | DIFF_OPT_SET(options, RECURSIVE); | |
3311 | /* | |
3312 | * Also pickaxe would not work very well if you do not say recursive | |
3313 | */ | |
3314 | if (options->pickaxe) | |
3315 | DIFF_OPT_SET(options, RECURSIVE); | |
3316 | /* | |
3317 | * When patches are generated, submodules diffed against the work tree | |
3318 | * must be checked for dirtiness too so it can be shown in the output | |
3319 | */ | |
3320 | if (options->output_format & DIFF_FORMAT_PATCH) | |
3321 | DIFF_OPT_SET(options, DIRTY_SUBMODULES); | |
3322 | ||
3323 | if (options->detect_rename && options->rename_limit < 0) | |
3324 | options->rename_limit = diff_rename_limit_default; | |
3325 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
3326 | if (!active_cache) | |
3327 | /* read-cache does not die even when it fails | |
3328 | * so it is safe for us to do this here. Also | |
3329 | * it does not smudge active_cache or active_nr | |
3330 | * when it fails, so we do not have to worry about | |
3331 | * cleaning it up ourselves either. | |
3332 | */ | |
3333 | read_cache(); | |
3334 | } | |
3335 | if (options->abbrev <= 0 || 40 < options->abbrev) | |
3336 | options->abbrev = 40; /* full */ | |
3337 | ||
3338 | /* | |
3339 | * It does not make sense to show the first hit we happened | |
3340 | * to have found. It does not make sense not to return with | |
3341 | * exit code in such a case either. | |
3342 | */ | |
3343 | if (DIFF_OPT_TST(options, QUICK)) { | |
3344 | options->output_format = DIFF_FORMAT_NO_OUTPUT; | |
3345 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); | |
3346 | } | |
3347 | ||
3348 | options->diff_path_counter = 0; | |
3349 | ||
3350 | if (DIFF_OPT_TST(options, FOLLOW_RENAMES) && options->pathspec.nr != 1) | |
3351 | die(_("--follow requires exactly one pathspec")); | |
3352 | } | |
3353 | ||
3354 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) | |
3355 | { | |
3356 | char c, *eq; | |
3357 | int len; | |
3358 | ||
3359 | if (*arg != '-') | |
3360 | return 0; | |
3361 | c = *++arg; | |
3362 | if (!c) | |
3363 | return 0; | |
3364 | if (c == arg_short) { | |
3365 | c = *++arg; | |
3366 | if (!c) | |
3367 | return 1; | |
3368 | if (val && isdigit(c)) { | |
3369 | char *end; | |
3370 | int n = strtoul(arg, &end, 10); | |
3371 | if (*end) | |
3372 | return 0; | |
3373 | *val = n; | |
3374 | return 1; | |
3375 | } | |
3376 | return 0; | |
3377 | } | |
3378 | if (c != '-') | |
3379 | return 0; | |
3380 | arg++; | |
3381 | eq = strchrnul(arg, '='); | |
3382 | len = eq - arg; | |
3383 | if (!len || strncmp(arg, arg_long, len)) | |
3384 | return 0; | |
3385 | if (*eq) { | |
3386 | int n; | |
3387 | char *end; | |
3388 | if (!isdigit(*++eq)) | |
3389 | return 0; | |
3390 | n = strtoul(eq, &end, 10); | |
3391 | if (*end) | |
3392 | return 0; | |
3393 | *val = n; | |
3394 | } | |
3395 | return 1; | |
3396 | } | |
3397 | ||
3398 | static int diff_scoreopt_parse(const char *opt); | |
3399 | ||
3400 | static inline int short_opt(char opt, const char **argv, | |
3401 | const char **optarg) | |
3402 | { | |
3403 | const char *arg = argv[0]; | |
3404 | if (arg[0] != '-' || arg[1] != opt) | |
3405 | return 0; | |
3406 | if (arg[2] != '\0') { | |
3407 | *optarg = arg + 2; | |
3408 | return 1; | |
3409 | } | |
3410 | if (!argv[1]) | |
3411 | die("Option '%c' requires a value", opt); | |
3412 | *optarg = argv[1]; | |
3413 | return 2; | |
3414 | } | |
3415 | ||
3416 | int parse_long_opt(const char *opt, const char **argv, | |
3417 | const char **optarg) | |
3418 | { | |
3419 | const char *arg = argv[0]; | |
3420 | if (!skip_prefix(arg, "--", &arg)) | |
3421 | return 0; | |
3422 | if (!skip_prefix(arg, opt, &arg)) | |
3423 | return 0; | |
3424 | if (*arg == '=') { /* stuck form: --option=value */ | |
3425 | *optarg = arg + 1; | |
3426 | return 1; | |
3427 | } | |
3428 | if (*arg != '\0') | |
3429 | return 0; | |
3430 | /* separate form: --option value */ | |
3431 | if (!argv[1]) | |
3432 | die("Option '--%s' requires a value", opt); | |
3433 | *optarg = argv[1]; | |
3434 | return 2; | |
3435 | } | |
3436 | ||
3437 | static int stat_opt(struct diff_options *options, const char **av) | |
3438 | { | |
3439 | const char *arg = av[0]; | |
3440 | char *end; | |
3441 | int width = options->stat_width; | |
3442 | int name_width = options->stat_name_width; | |
3443 | int graph_width = options->stat_graph_width; | |
3444 | int count = options->stat_count; | |
3445 | int argcount = 1; | |
3446 | ||
3447 | if (!skip_prefix(arg, "--stat", &arg)) | |
3448 | die("BUG: stat option does not begin with --stat: %s", arg); | |
3449 | end = (char *)arg; | |
3450 | ||
3451 | switch (*arg) { | |
3452 | case '-': | |
3453 | if (skip_prefix(arg, "-width", &arg)) { | |
3454 | if (*arg == '=') | |
3455 | width = strtoul(arg + 1, &end, 10); | |
3456 | else if (!*arg && !av[1]) | |
3457 | die("Option '--stat-width' requires a value"); | |
3458 | else if (!*arg) { | |
3459 | width = strtoul(av[1], &end, 10); | |
3460 | argcount = 2; | |
3461 | } | |
3462 | } else if (skip_prefix(arg, "-name-width", &arg)) { | |
3463 | if (*arg == '=') | |
3464 | name_width = strtoul(arg + 1, &end, 10); | |
3465 | else if (!*arg && !av[1]) | |
3466 | die("Option '--stat-name-width' requires a value"); | |
3467 | else if (!*arg) { | |
3468 | name_width = strtoul(av[1], &end, 10); | |
3469 | argcount = 2; | |
3470 | } | |
3471 | } else if (skip_prefix(arg, "-graph-width", &arg)) { | |
3472 | if (*arg == '=') | |
3473 | graph_width = strtoul(arg + 1, &end, 10); | |
3474 | else if (!*arg && !av[1]) | |
3475 | die("Option '--stat-graph-width' requires a value"); | |
3476 | else if (!*arg) { | |
3477 | graph_width = strtoul(av[1], &end, 10); | |
3478 | argcount = 2; | |
3479 | } | |
3480 | } else if (skip_prefix(arg, "-count", &arg)) { | |
3481 | if (*arg == '=') | |
3482 | count = strtoul(arg + 1, &end, 10); | |
3483 | else if (!*arg && !av[1]) | |
3484 | die("Option '--stat-count' requires a value"); | |
3485 | else if (!*arg) { | |
3486 | count = strtoul(av[1], &end, 10); | |
3487 | argcount = 2; | |
3488 | } | |
3489 | } | |
3490 | break; | |
3491 | case '=': | |
3492 | width = strtoul(arg+1, &end, 10); | |
3493 | if (*end == ',') | |
3494 | name_width = strtoul(end+1, &end, 10); | |
3495 | if (*end == ',') | |
3496 | count = strtoul(end+1, &end, 10); | |
3497 | } | |
3498 | ||
3499 | /* Important! This checks all the error cases! */ | |
3500 | if (*end) | |
3501 | return 0; | |
3502 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3503 | options->stat_name_width = name_width; | |
3504 | options->stat_graph_width = graph_width; | |
3505 | options->stat_width = width; | |
3506 | options->stat_count = count; | |
3507 | return argcount; | |
3508 | } | |
3509 | ||
3510 | static int parse_dirstat_opt(struct diff_options *options, const char *params) | |
3511 | { | |
3512 | struct strbuf errmsg = STRBUF_INIT; | |
3513 | if (parse_dirstat_params(options, params, &errmsg)) | |
3514 | die(_("Failed to parse --dirstat/-X option parameter:\n%s"), | |
3515 | errmsg.buf); | |
3516 | strbuf_release(&errmsg); | |
3517 | /* | |
3518 | * The caller knows a dirstat-related option is given from the command | |
3519 | * line; allow it to say "return this_function();" | |
3520 | */ | |
3521 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3522 | return 1; | |
3523 | } | |
3524 | ||
3525 | static int parse_submodule_opt(struct diff_options *options, const char *value) | |
3526 | { | |
3527 | if (parse_submodule_params(options, value)) | |
3528 | die(_("Failed to parse --submodule option parameter: '%s'"), | |
3529 | value); | |
3530 | return 1; | |
3531 | } | |
3532 | ||
3533 | static const char diff_status_letters[] = { | |
3534 | DIFF_STATUS_ADDED, | |
3535 | DIFF_STATUS_COPIED, | |
3536 | DIFF_STATUS_DELETED, | |
3537 | DIFF_STATUS_MODIFIED, | |
3538 | DIFF_STATUS_RENAMED, | |
3539 | DIFF_STATUS_TYPE_CHANGED, | |
3540 | DIFF_STATUS_UNKNOWN, | |
3541 | DIFF_STATUS_UNMERGED, | |
3542 | DIFF_STATUS_FILTER_AON, | |
3543 | DIFF_STATUS_FILTER_BROKEN, | |
3544 | '\0', | |
3545 | }; | |
3546 | ||
3547 | static unsigned int filter_bit['Z' + 1]; | |
3548 | ||
3549 | static void prepare_filter_bits(void) | |
3550 | { | |
3551 | int i; | |
3552 | ||
3553 | if (!filter_bit[DIFF_STATUS_ADDED]) { | |
3554 | for (i = 0; diff_status_letters[i]; i++) | |
3555 | filter_bit[(int) diff_status_letters[i]] = (1 << i); | |
3556 | } | |
3557 | } | |
3558 | ||
3559 | static unsigned filter_bit_tst(char status, const struct diff_options *opt) | |
3560 | { | |
3561 | return opt->filter & filter_bit[(int) status]; | |
3562 | } | |
3563 | ||
3564 | static int parse_diff_filter_opt(const char *optarg, struct diff_options *opt) | |
3565 | { | |
3566 | int i, optch; | |
3567 | ||
3568 | prepare_filter_bits(); | |
3569 | ||
3570 | /* | |
3571 | * If there is a negation e.g. 'd' in the input, and we haven't | |
3572 | * initialized the filter field with another --diff-filter, start | |
3573 | * from full set of bits, except for AON. | |
3574 | */ | |
3575 | if (!opt->filter) { | |
3576 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { | |
3577 | if (optch < 'a' || 'z' < optch) | |
3578 | continue; | |
3579 | opt->filter = (1 << (ARRAY_SIZE(diff_status_letters) - 1)) - 1; | |
3580 | opt->filter &= ~filter_bit[DIFF_STATUS_FILTER_AON]; | |
3581 | break; | |
3582 | } | |
3583 | } | |
3584 | ||
3585 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { | |
3586 | unsigned int bit; | |
3587 | int negate; | |
3588 | ||
3589 | if ('a' <= optch && optch <= 'z') { | |
3590 | negate = 1; | |
3591 | optch = toupper(optch); | |
3592 | } else { | |
3593 | negate = 0; | |
3594 | } | |
3595 | ||
3596 | bit = (0 <= optch && optch <= 'Z') ? filter_bit[optch] : 0; | |
3597 | if (!bit) | |
3598 | return optarg[i]; | |
3599 | if (negate) | |
3600 | opt->filter &= ~bit; | |
3601 | else | |
3602 | opt->filter |= bit; | |
3603 | } | |
3604 | return 0; | |
3605 | } | |
3606 | ||
3607 | static void enable_patch_output(int *fmt) { | |
3608 | *fmt &= ~DIFF_FORMAT_NO_OUTPUT; | |
3609 | *fmt |= DIFF_FORMAT_PATCH; | |
3610 | } | |
3611 | ||
3612 | int diff_opt_parse(struct diff_options *options, const char **av, int ac) | |
3613 | { | |
3614 | const char *arg = av[0]; | |
3615 | const char *optarg; | |
3616 | int argcount; | |
3617 | ||
3618 | /* Output format options */ | |
3619 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch") | |
3620 | || opt_arg(arg, 'U', "unified", &options->context)) | |
3621 | enable_patch_output(&options->output_format); | |
3622 | else if (!strcmp(arg, "--raw")) | |
3623 | options->output_format |= DIFF_FORMAT_RAW; | |
3624 | else if (!strcmp(arg, "--patch-with-raw")) { | |
3625 | enable_patch_output(&options->output_format); | |
3626 | options->output_format |= DIFF_FORMAT_RAW; | |
3627 | } else if (!strcmp(arg, "--numstat")) | |
3628 | options->output_format |= DIFF_FORMAT_NUMSTAT; | |
3629 | else if (!strcmp(arg, "--shortstat")) | |
3630 | options->output_format |= DIFF_FORMAT_SHORTSTAT; | |
3631 | else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) | |
3632 | return parse_dirstat_opt(options, ""); | |
3633 | else if (skip_prefix(arg, "-X", &arg)) | |
3634 | return parse_dirstat_opt(options, arg); | |
3635 | else if (skip_prefix(arg, "--dirstat=", &arg)) | |
3636 | return parse_dirstat_opt(options, arg); | |
3637 | else if (!strcmp(arg, "--cumulative")) | |
3638 | return parse_dirstat_opt(options, "cumulative"); | |
3639 | else if (!strcmp(arg, "--dirstat-by-file")) | |
3640 | return parse_dirstat_opt(options, "files"); | |
3641 | else if (skip_prefix(arg, "--dirstat-by-file=", &arg)) { | |
3642 | parse_dirstat_opt(options, "files"); | |
3643 | return parse_dirstat_opt(options, arg); | |
3644 | } | |
3645 | else if (!strcmp(arg, "--check")) | |
3646 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
3647 | else if (!strcmp(arg, "--summary")) | |
3648 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
3649 | else if (!strcmp(arg, "--patch-with-stat")) { | |
3650 | enable_patch_output(&options->output_format); | |
3651 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3652 | } else if (!strcmp(arg, "--name-only")) | |
3653 | options->output_format |= DIFF_FORMAT_NAME; | |
3654 | else if (!strcmp(arg, "--name-status")) | |
3655 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
3656 | else if (!strcmp(arg, "-s") || !strcmp(arg, "--no-patch")) | |
3657 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; | |
3658 | else if (starts_with(arg, "--stat")) | |
3659 | /* --stat, --stat-width, --stat-name-width, or --stat-count */ | |
3660 | return stat_opt(options, av); | |
3661 | ||
3662 | /* renames options */ | |
3663 | else if (starts_with(arg, "-B") || starts_with(arg, "--break-rewrites=") || | |
3664 | !strcmp(arg, "--break-rewrites")) { | |
3665 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) | |
3666 | return error("invalid argument to -B: %s", arg+2); | |
3667 | } | |
3668 | else if (starts_with(arg, "-M") || starts_with(arg, "--find-renames=") || | |
3669 | !strcmp(arg, "--find-renames")) { | |
3670 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
3671 | return error("invalid argument to -M: %s", arg+2); | |
3672 | options->detect_rename = DIFF_DETECT_RENAME; | |
3673 | } | |
3674 | else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { | |
3675 | options->irreversible_delete = 1; | |
3676 | } | |
3677 | else if (starts_with(arg, "-C") || starts_with(arg, "--find-copies=") || | |
3678 | !strcmp(arg, "--find-copies")) { | |
3679 | if (options->detect_rename == DIFF_DETECT_COPY) | |
3680 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); | |
3681 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
3682 | return error("invalid argument to -C: %s", arg+2); | |
3683 | options->detect_rename = DIFF_DETECT_COPY; | |
3684 | } | |
3685 | else if (!strcmp(arg, "--no-renames")) | |
3686 | options->detect_rename = 0; | |
3687 | else if (!strcmp(arg, "--rename-empty")) | |
3688 | DIFF_OPT_SET(options, RENAME_EMPTY); | |
3689 | else if (!strcmp(arg, "--no-rename-empty")) | |
3690 | DIFF_OPT_CLR(options, RENAME_EMPTY); | |
3691 | else if (!strcmp(arg, "--relative")) | |
3692 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
3693 | else if (skip_prefix(arg, "--relative=", &arg)) { | |
3694 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
3695 | options->prefix = arg; | |
3696 | } | |
3697 | ||
3698 | /* xdiff options */ | |
3699 | else if (!strcmp(arg, "--minimal")) | |
3700 | DIFF_XDL_SET(options, NEED_MINIMAL); | |
3701 | else if (!strcmp(arg, "--no-minimal")) | |
3702 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
3703 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) | |
3704 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); | |
3705 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) | |
3706 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); | |
3707 | else if (!strcmp(arg, "--ignore-space-at-eol")) | |
3708 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); | |
3709 | else if (!strcmp(arg, "--ignore-blank-lines")) | |
3710 | DIFF_XDL_SET(options, IGNORE_BLANK_LINES); | |
3711 | else if (!strcmp(arg, "--patience")) | |
3712 | options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); | |
3713 | else if (!strcmp(arg, "--histogram")) | |
3714 | options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF); | |
3715 | else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) { | |
3716 | long value = parse_algorithm_value(optarg); | |
3717 | if (value < 0) | |
3718 | return error("option diff-algorithm accepts \"myers\", " | |
3719 | "\"minimal\", \"patience\" and \"histogram\""); | |
3720 | /* clear out previous settings */ | |
3721 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
3722 | options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK; | |
3723 | options->xdl_opts |= value; | |
3724 | return argcount; | |
3725 | } | |
3726 | ||
3727 | /* flags options */ | |
3728 | else if (!strcmp(arg, "--binary")) { | |
3729 | enable_patch_output(&options->output_format); | |
3730 | DIFF_OPT_SET(options, BINARY); | |
3731 | } | |
3732 | else if (!strcmp(arg, "--full-index")) | |
3733 | DIFF_OPT_SET(options, FULL_INDEX); | |
3734 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
3735 | DIFF_OPT_SET(options, TEXT); | |
3736 | else if (!strcmp(arg, "-R")) | |
3737 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
3738 | else if (!strcmp(arg, "--find-copies-harder")) | |
3739 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); | |
3740 | else if (!strcmp(arg, "--follow")) | |
3741 | DIFF_OPT_SET(options, FOLLOW_RENAMES); | |
3742 | else if (!strcmp(arg, "--no-follow")) | |
3743 | DIFF_OPT_CLR(options, FOLLOW_RENAMES); | |
3744 | else if (!strcmp(arg, "--color")) | |
3745 | options->use_color = 1; | |
3746 | else if (skip_prefix(arg, "--color=", &arg)) { | |
3747 | int value = git_config_colorbool(NULL, arg); | |
3748 | if (value < 0) | |
3749 | return error("option `color' expects \"always\", \"auto\", or \"never\""); | |
3750 | options->use_color = value; | |
3751 | } | |
3752 | else if (!strcmp(arg, "--no-color")) | |
3753 | options->use_color = 0; | |
3754 | else if (!strcmp(arg, "--color-words")) { | |
3755 | options->use_color = 1; | |
3756 | options->word_diff = DIFF_WORDS_COLOR; | |
3757 | } | |
3758 | else if (skip_prefix(arg, "--color-words=", &arg)) { | |
3759 | options->use_color = 1; | |
3760 | options->word_diff = DIFF_WORDS_COLOR; | |
3761 | options->word_regex = arg; | |
3762 | } | |
3763 | else if (!strcmp(arg, "--word-diff")) { | |
3764 | if (options->word_diff == DIFF_WORDS_NONE) | |
3765 | options->word_diff = DIFF_WORDS_PLAIN; | |
3766 | } | |
3767 | else if (skip_prefix(arg, "--word-diff=", &arg)) { | |
3768 | if (!strcmp(arg, "plain")) | |
3769 | options->word_diff = DIFF_WORDS_PLAIN; | |
3770 | else if (!strcmp(arg, "color")) { | |
3771 | options->use_color = 1; | |
3772 | options->word_diff = DIFF_WORDS_COLOR; | |
3773 | } | |
3774 | else if (!strcmp(arg, "porcelain")) | |
3775 | options->word_diff = DIFF_WORDS_PORCELAIN; | |
3776 | else if (!strcmp(arg, "none")) | |
3777 | options->word_diff = DIFF_WORDS_NONE; | |
3778 | else | |
3779 | die("bad --word-diff argument: %s", arg); | |
3780 | } | |
3781 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { | |
3782 | if (options->word_diff == DIFF_WORDS_NONE) | |
3783 | options->word_diff = DIFF_WORDS_PLAIN; | |
3784 | options->word_regex = optarg; | |
3785 | return argcount; | |
3786 | } | |
3787 | else if (!strcmp(arg, "--exit-code")) | |
3788 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); | |
3789 | else if (!strcmp(arg, "--quiet")) | |
3790 | DIFF_OPT_SET(options, QUICK); | |
3791 | else if (!strcmp(arg, "--ext-diff")) | |
3792 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); | |
3793 | else if (!strcmp(arg, "--no-ext-diff")) | |
3794 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); | |
3795 | else if (!strcmp(arg, "--textconv")) | |
3796 | DIFF_OPT_SET(options, ALLOW_TEXTCONV); | |
3797 | else if (!strcmp(arg, "--no-textconv")) | |
3798 | DIFF_OPT_CLR(options, ALLOW_TEXTCONV); | |
3799 | else if (!strcmp(arg, "--ignore-submodules")) { | |
3800 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
3801 | handle_ignore_submodules_arg(options, "all"); | |
3802 | } else if (skip_prefix(arg, "--ignore-submodules=", &arg)) { | |
3803 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
3804 | handle_ignore_submodules_arg(options, arg); | |
3805 | } else if (!strcmp(arg, "--submodule")) | |
3806 | DIFF_OPT_SET(options, SUBMODULE_LOG); | |
3807 | else if (skip_prefix(arg, "--submodule=", &arg)) | |
3808 | return parse_submodule_opt(options, arg); | |
3809 | ||
3810 | /* misc options */ | |
3811 | else if (!strcmp(arg, "-z")) | |
3812 | options->line_termination = 0; | |
3813 | else if ((argcount = short_opt('l', av, &optarg))) { | |
3814 | options->rename_limit = strtoul(optarg, NULL, 10); | |
3815 | return argcount; | |
3816 | } | |
3817 | else if ((argcount = short_opt('S', av, &optarg))) { | |
3818 | options->pickaxe = optarg; | |
3819 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; | |
3820 | return argcount; | |
3821 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
3822 | options->pickaxe = optarg; | |
3823 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
3824 | return argcount; | |
3825 | } | |
3826 | else if (!strcmp(arg, "--pickaxe-all")) | |
3827 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; | |
3828 | else if (!strcmp(arg, "--pickaxe-regex")) | |
3829 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; | |
3830 | else if ((argcount = short_opt('O', av, &optarg))) { | |
3831 | options->orderfile = optarg; | |
3832 | return argcount; | |
3833 | } | |
3834 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
3835 | int offending = parse_diff_filter_opt(optarg, options); | |
3836 | if (offending) | |
3837 | die("unknown change class '%c' in --diff-filter=%s", | |
3838 | offending, optarg); | |
3839 | return argcount; | |
3840 | } | |
3841 | else if (!strcmp(arg, "--abbrev")) | |
3842 | options->abbrev = DEFAULT_ABBREV; | |
3843 | else if (skip_prefix(arg, "--abbrev=", &arg)) { | |
3844 | options->abbrev = strtoul(arg, NULL, 10); | |
3845 | if (options->abbrev < MINIMUM_ABBREV) | |
3846 | options->abbrev = MINIMUM_ABBREV; | |
3847 | else if (40 < options->abbrev) | |
3848 | options->abbrev = 40; | |
3849 | } | |
3850 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { | |
3851 | options->a_prefix = optarg; | |
3852 | return argcount; | |
3853 | } | |
3854 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { | |
3855 | options->b_prefix = optarg; | |
3856 | return argcount; | |
3857 | } | |
3858 | else if (!strcmp(arg, "--no-prefix")) | |
3859 | options->a_prefix = options->b_prefix = ""; | |
3860 | else if (opt_arg(arg, '\0', "inter-hunk-context", | |
3861 | &options->interhunkcontext)) | |
3862 | ; | |
3863 | else if (!strcmp(arg, "-W")) | |
3864 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
3865 | else if (!strcmp(arg, "--function-context")) | |
3866 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
3867 | else if (!strcmp(arg, "--no-function-context")) | |
3868 | DIFF_OPT_CLR(options, FUNCCONTEXT); | |
3869 | else if ((argcount = parse_long_opt("output", av, &optarg))) { | |
3870 | options->file = fopen(optarg, "w"); | |
3871 | if (!options->file) | |
3872 | die_errno("Could not open '%s'", optarg); | |
3873 | options->close_file = 1; | |
3874 | return argcount; | |
3875 | } else | |
3876 | return 0; | |
3877 | return 1; | |
3878 | } | |
3879 | ||
3880 | int parse_rename_score(const char **cp_p) | |
3881 | { | |
3882 | unsigned long num, scale; | |
3883 | int ch, dot; | |
3884 | const char *cp = *cp_p; | |
3885 | ||
3886 | num = 0; | |
3887 | scale = 1; | |
3888 | dot = 0; | |
3889 | for (;;) { | |
3890 | ch = *cp; | |
3891 | if ( !dot && ch == '.' ) { | |
3892 | scale = 1; | |
3893 | dot = 1; | |
3894 | } else if ( ch == '%' ) { | |
3895 | scale = dot ? scale*100 : 100; | |
3896 | cp++; /* % is always at the end */ | |
3897 | break; | |
3898 | } else if ( ch >= '0' && ch <= '9' ) { | |
3899 | if ( scale < 100000 ) { | |
3900 | scale *= 10; | |
3901 | num = (num*10) + (ch-'0'); | |
3902 | } | |
3903 | } else { | |
3904 | break; | |
3905 | } | |
3906 | cp++; | |
3907 | } | |
3908 | *cp_p = cp; | |
3909 | ||
3910 | /* user says num divided by scale and we say internally that | |
3911 | * is MAX_SCORE * num / scale. | |
3912 | */ | |
3913 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); | |
3914 | } | |
3915 | ||
3916 | static int diff_scoreopt_parse(const char *opt) | |
3917 | { | |
3918 | int opt1, opt2, cmd; | |
3919 | ||
3920 | if (*opt++ != '-') | |
3921 | return -1; | |
3922 | cmd = *opt++; | |
3923 | if (cmd == '-') { | |
3924 | /* convert the long-form arguments into short-form versions */ | |
3925 | if (skip_prefix(opt, "break-rewrites", &opt)) { | |
3926 | if (*opt == 0 || *opt++ == '=') | |
3927 | cmd = 'B'; | |
3928 | } else if (skip_prefix(opt, "find-copies", &opt)) { | |
3929 | if (*opt == 0 || *opt++ == '=') | |
3930 | cmd = 'C'; | |
3931 | } else if (skip_prefix(opt, "find-renames", &opt)) { | |
3932 | if (*opt == 0 || *opt++ == '=') | |
3933 | cmd = 'M'; | |
3934 | } | |
3935 | } | |
3936 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') | |
3937 | return -1; /* that is not a -M, -C, or -B option */ | |
3938 | ||
3939 | opt1 = parse_rename_score(&opt); | |
3940 | if (cmd != 'B') | |
3941 | opt2 = 0; | |
3942 | else { | |
3943 | if (*opt == 0) | |
3944 | opt2 = 0; | |
3945 | else if (*opt != '/') | |
3946 | return -1; /* we expect -B80/99 or -B80 */ | |
3947 | else { | |
3948 | opt++; | |
3949 | opt2 = parse_rename_score(&opt); | |
3950 | } | |
3951 | } | |
3952 | if (*opt != 0) | |
3953 | return -1; | |
3954 | return opt1 | (opt2 << 16); | |
3955 | } | |
3956 | ||
3957 | struct diff_queue_struct diff_queued_diff; | |
3958 | ||
3959 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
3960 | { | |
3961 | ALLOC_GROW(queue->queue, queue->nr + 1, queue->alloc); | |
3962 | queue->queue[queue->nr++] = dp; | |
3963 | } | |
3964 | ||
3965 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
3966 | struct diff_filespec *one, | |
3967 | struct diff_filespec *two) | |
3968 | { | |
3969 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); | |
3970 | dp->one = one; | |
3971 | dp->two = two; | |
3972 | if (queue) | |
3973 | diff_q(queue, dp); | |
3974 | return dp; | |
3975 | } | |
3976 | ||
3977 | void diff_free_filepair(struct diff_filepair *p) | |
3978 | { | |
3979 | free_filespec(p->one); | |
3980 | free_filespec(p->two); | |
3981 | free(p); | |
3982 | } | |
3983 | ||
3984 | /* This is different from find_unique_abbrev() in that | |
3985 | * it stuffs the result with dots for alignment. | |
3986 | */ | |
3987 | const char *diff_unique_abbrev(const unsigned char *sha1, int len) | |
3988 | { | |
3989 | int abblen; | |
3990 | const char *abbrev; | |
3991 | if (len == 40) | |
3992 | return sha1_to_hex(sha1); | |
3993 | ||
3994 | abbrev = find_unique_abbrev(sha1, len); | |
3995 | abblen = strlen(abbrev); | |
3996 | if (abblen < 37) { | |
3997 | static char hex[41]; | |
3998 | if (len < abblen && abblen <= len + 2) | |
3999 | sprintf(hex, "%s%.*s", abbrev, len+3-abblen, ".."); | |
4000 | else | |
4001 | sprintf(hex, "%s...", abbrev); | |
4002 | return hex; | |
4003 | } | |
4004 | return sha1_to_hex(sha1); | |
4005 | } | |
4006 | ||
4007 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) | |
4008 | { | |
4009 | int line_termination = opt->line_termination; | |
4010 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
4011 | ||
4012 | fprintf(opt->file, "%s", diff_line_prefix(opt)); | |
4013 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { | |
4014 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, | |
4015 | diff_unique_abbrev(p->one->sha1, opt->abbrev)); | |
4016 | fprintf(opt->file, "%s ", diff_unique_abbrev(p->two->sha1, opt->abbrev)); | |
4017 | } | |
4018 | if (p->score) { | |
4019 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), | |
4020 | inter_name_termination); | |
4021 | } else { | |
4022 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); | |
4023 | } | |
4024 | ||
4025 | if (p->status == DIFF_STATUS_COPIED || | |
4026 | p->status == DIFF_STATUS_RENAMED) { | |
4027 | const char *name_a, *name_b; | |
4028 | name_a = p->one->path; | |
4029 | name_b = p->two->path; | |
4030 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
4031 | write_name_quoted(name_a, opt->file, inter_name_termination); | |
4032 | write_name_quoted(name_b, opt->file, line_termination); | |
4033 | } else { | |
4034 | const char *name_a, *name_b; | |
4035 | name_a = p->one->mode ? p->one->path : p->two->path; | |
4036 | name_b = NULL; | |
4037 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
4038 | write_name_quoted(name_a, opt->file, line_termination); | |
4039 | } | |
4040 | } | |
4041 | ||
4042 | int diff_unmodified_pair(struct diff_filepair *p) | |
4043 | { | |
4044 | /* This function is written stricter than necessary to support | |
4045 | * the currently implemented transformers, but the idea is to | |
4046 | * let transformers to produce diff_filepairs any way they want, | |
4047 | * and filter and clean them up here before producing the output. | |
4048 | */ | |
4049 | struct diff_filespec *one = p->one, *two = p->two; | |
4050 | ||
4051 | if (DIFF_PAIR_UNMERGED(p)) | |
4052 | return 0; /* unmerged is interesting */ | |
4053 | ||
4054 | /* deletion, addition, mode or type change | |
4055 | * and rename are all interesting. | |
4056 | */ | |
4057 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
4058 | DIFF_PAIR_MODE_CHANGED(p) || | |
4059 | strcmp(one->path, two->path)) | |
4060 | return 0; | |
4061 | ||
4062 | /* both are valid and point at the same path. that is, we are | |
4063 | * dealing with a change. | |
4064 | */ | |
4065 | if (one->sha1_valid && two->sha1_valid && | |
4066 | !hashcmp(one->sha1, two->sha1) && | |
4067 | !one->dirty_submodule && !two->dirty_submodule) | |
4068 | return 1; /* no change */ | |
4069 | if (!one->sha1_valid && !two->sha1_valid) | |
4070 | return 1; /* both look at the same file on the filesystem. */ | |
4071 | return 0; | |
4072 | } | |
4073 | ||
4074 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
4075 | { | |
4076 | if (diff_unmodified_pair(p)) | |
4077 | return; | |
4078 | ||
4079 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4080 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4081 | return; /* no tree diffs in patch format */ | |
4082 | ||
4083 | run_diff(p, o); | |
4084 | } | |
4085 | ||
4086 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
4087 | struct diffstat_t *diffstat) | |
4088 | { | |
4089 | if (diff_unmodified_pair(p)) | |
4090 | return; | |
4091 | ||
4092 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4093 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4094 | return; /* no useful stat for tree diffs */ | |
4095 | ||
4096 | run_diffstat(p, o, diffstat); | |
4097 | } | |
4098 | ||
4099 | static void diff_flush_checkdiff(struct diff_filepair *p, | |
4100 | struct diff_options *o) | |
4101 | { | |
4102 | if (diff_unmodified_pair(p)) | |
4103 | return; | |
4104 | ||
4105 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4106 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4107 | return; /* nothing to check in tree diffs */ | |
4108 | ||
4109 | run_checkdiff(p, o); | |
4110 | } | |
4111 | ||
4112 | int diff_queue_is_empty(void) | |
4113 | { | |
4114 | struct diff_queue_struct *q = &diff_queued_diff; | |
4115 | int i; | |
4116 | for (i = 0; i < q->nr; i++) | |
4117 | if (!diff_unmodified_pair(q->queue[i])) | |
4118 | return 0; | |
4119 | return 1; | |
4120 | } | |
4121 | ||
4122 | #if DIFF_DEBUG | |
4123 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
4124 | { | |
4125 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
4126 | x, one ? one : "", | |
4127 | s->path, | |
4128 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
4129 | s->mode, | |
4130 | s->sha1_valid ? sha1_to_hex(s->sha1) : ""); | |
4131 | fprintf(stderr, "queue[%d] %s size %lu\n", | |
4132 | x, one ? one : "", | |
4133 | s->size); | |
4134 | } | |
4135 | ||
4136 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
4137 | { | |
4138 | diff_debug_filespec(p->one, i, "one"); | |
4139 | diff_debug_filespec(p->two, i, "two"); | |
4140 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", | |
4141 | p->score, p->status ? p->status : '?', | |
4142 | p->one->rename_used, p->broken_pair); | |
4143 | } | |
4144 | ||
4145 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
4146 | { | |
4147 | int i; | |
4148 | if (msg) | |
4149 | fprintf(stderr, "%s\n", msg); | |
4150 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
4151 | for (i = 0; i < q->nr; i++) { | |
4152 | struct diff_filepair *p = q->queue[i]; | |
4153 | diff_debug_filepair(p, i); | |
4154 | } | |
4155 | } | |
4156 | #endif | |
4157 | ||
4158 | static void diff_resolve_rename_copy(void) | |
4159 | { | |
4160 | int i; | |
4161 | struct diff_filepair *p; | |
4162 | struct diff_queue_struct *q = &diff_queued_diff; | |
4163 | ||
4164 | diff_debug_queue("resolve-rename-copy", q); | |
4165 | ||
4166 | for (i = 0; i < q->nr; i++) { | |
4167 | p = q->queue[i]; | |
4168 | p->status = 0; /* undecided */ | |
4169 | if (DIFF_PAIR_UNMERGED(p)) | |
4170 | p->status = DIFF_STATUS_UNMERGED; | |
4171 | else if (!DIFF_FILE_VALID(p->one)) | |
4172 | p->status = DIFF_STATUS_ADDED; | |
4173 | else if (!DIFF_FILE_VALID(p->two)) | |
4174 | p->status = DIFF_STATUS_DELETED; | |
4175 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
4176 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
4177 | ||
4178 | /* from this point on, we are dealing with a pair | |
4179 | * whose both sides are valid and of the same type, i.e. | |
4180 | * either in-place edit or rename/copy edit. | |
4181 | */ | |
4182 | else if (DIFF_PAIR_RENAME(p)) { | |
4183 | /* | |
4184 | * A rename might have re-connected a broken | |
4185 | * pair up, causing the pathnames to be the | |
4186 | * same again. If so, that's not a rename at | |
4187 | * all, just a modification.. | |
4188 | * | |
4189 | * Otherwise, see if this source was used for | |
4190 | * multiple renames, in which case we decrement | |
4191 | * the count, and call it a copy. | |
4192 | */ | |
4193 | if (!strcmp(p->one->path, p->two->path)) | |
4194 | p->status = DIFF_STATUS_MODIFIED; | |
4195 | else if (--p->one->rename_used > 0) | |
4196 | p->status = DIFF_STATUS_COPIED; | |
4197 | else | |
4198 | p->status = DIFF_STATUS_RENAMED; | |
4199 | } | |
4200 | else if (hashcmp(p->one->sha1, p->two->sha1) || | |
4201 | p->one->mode != p->two->mode || | |
4202 | p->one->dirty_submodule || | |
4203 | p->two->dirty_submodule || | |
4204 | is_null_sha1(p->one->sha1)) | |
4205 | p->status = DIFF_STATUS_MODIFIED; | |
4206 | else { | |
4207 | /* This is a "no-change" entry and should not | |
4208 | * happen anymore, but prepare for broken callers. | |
4209 | */ | |
4210 | error("feeding unmodified %s to diffcore", | |
4211 | p->one->path); | |
4212 | p->status = DIFF_STATUS_UNKNOWN; | |
4213 | } | |
4214 | } | |
4215 | diff_debug_queue("resolve-rename-copy done", q); | |
4216 | } | |
4217 | ||
4218 | static int check_pair_status(struct diff_filepair *p) | |
4219 | { | |
4220 | switch (p->status) { | |
4221 | case DIFF_STATUS_UNKNOWN: | |
4222 | return 0; | |
4223 | case 0: | |
4224 | die("internal error in diff-resolve-rename-copy"); | |
4225 | default: | |
4226 | return 1; | |
4227 | } | |
4228 | } | |
4229 | ||
4230 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) | |
4231 | { | |
4232 | int fmt = opt->output_format; | |
4233 | ||
4234 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
4235 | diff_flush_checkdiff(p, opt); | |
4236 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
4237 | diff_flush_raw(p, opt); | |
4238 | else if (fmt & DIFF_FORMAT_NAME) { | |
4239 | const char *name_a, *name_b; | |
4240 | name_a = p->two->path; | |
4241 | name_b = NULL; | |
4242 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
4243 | write_name_quoted(name_a, opt->file, opt->line_termination); | |
4244 | } | |
4245 | } | |
4246 | ||
4247 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) | |
4248 | { | |
4249 | if (fs->mode) | |
4250 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); | |
4251 | else | |
4252 | fprintf(file, " %s ", newdelete); | |
4253 | write_name_quoted(fs->path, file, '\n'); | |
4254 | } | |
4255 | ||
4256 | ||
4257 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, | |
4258 | const char *line_prefix) | |
4259 | { | |
4260 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
4261 | fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, | |
4262 | p->two->mode, show_name ? ' ' : '\n'); | |
4263 | if (show_name) { | |
4264 | write_name_quoted(p->two->path, file, '\n'); | |
4265 | } | |
4266 | } | |
4267 | } | |
4268 | ||
4269 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, | |
4270 | const char *line_prefix) | |
4271 | { | |
4272 | char *names = pprint_rename(p->one->path, p->two->path); | |
4273 | ||
4274 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); | |
4275 | free(names); | |
4276 | show_mode_change(file, p, 0, line_prefix); | |
4277 | } | |
4278 | ||
4279 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) | |
4280 | { | |
4281 | FILE *file = opt->file; | |
4282 | const char *line_prefix = diff_line_prefix(opt); | |
4283 | ||
4284 | switch(p->status) { | |
4285 | case DIFF_STATUS_DELETED: | |
4286 | fputs(line_prefix, file); | |
4287 | show_file_mode_name(file, "delete", p->one); | |
4288 | break; | |
4289 | case DIFF_STATUS_ADDED: | |
4290 | fputs(line_prefix, file); | |
4291 | show_file_mode_name(file, "create", p->two); | |
4292 | break; | |
4293 | case DIFF_STATUS_COPIED: | |
4294 | fputs(line_prefix, file); | |
4295 | show_rename_copy(file, "copy", p, line_prefix); | |
4296 | break; | |
4297 | case DIFF_STATUS_RENAMED: | |
4298 | fputs(line_prefix, file); | |
4299 | show_rename_copy(file, "rename", p, line_prefix); | |
4300 | break; | |
4301 | default: | |
4302 | if (p->score) { | |
4303 | fprintf(file, "%s rewrite ", line_prefix); | |
4304 | write_name_quoted(p->two->path, file, ' '); | |
4305 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
4306 | } | |
4307 | show_mode_change(file, p, !p->score, line_prefix); | |
4308 | break; | |
4309 | } | |
4310 | } | |
4311 | ||
4312 | struct patch_id_t { | |
4313 | git_SHA_CTX *ctx; | |
4314 | int patchlen; | |
4315 | }; | |
4316 | ||
4317 | static int remove_space(char *line, int len) | |
4318 | { | |
4319 | int i; | |
4320 | char *dst = line; | |
4321 | unsigned char c; | |
4322 | ||
4323 | for (i = 0; i < len; i++) | |
4324 | if (!isspace((c = line[i]))) | |
4325 | *dst++ = c; | |
4326 | ||
4327 | return dst - line; | |
4328 | } | |
4329 | ||
4330 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
4331 | { | |
4332 | struct patch_id_t *data = priv; | |
4333 | int new_len; | |
4334 | ||
4335 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
4336 | if (starts_with(line, "@@ -")) | |
4337 | return; | |
4338 | ||
4339 | new_len = remove_space(line, len); | |
4340 | ||
4341 | git_SHA1_Update(data->ctx, line, new_len); | |
4342 | data->patchlen += new_len; | |
4343 | } | |
4344 | ||
4345 | /* returns 0 upon success, and writes result into sha1 */ | |
4346 | static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1) | |
4347 | { | |
4348 | struct diff_queue_struct *q = &diff_queued_diff; | |
4349 | int i; | |
4350 | git_SHA_CTX ctx; | |
4351 | struct patch_id_t data; | |
4352 | char buffer[PATH_MAX * 4 + 20]; | |
4353 | ||
4354 | git_SHA1_Init(&ctx); | |
4355 | memset(&data, 0, sizeof(struct patch_id_t)); | |
4356 | data.ctx = &ctx; | |
4357 | ||
4358 | for (i = 0; i < q->nr; i++) { | |
4359 | xpparam_t xpp; | |
4360 | xdemitconf_t xecfg; | |
4361 | mmfile_t mf1, mf2; | |
4362 | struct diff_filepair *p = q->queue[i]; | |
4363 | int len1, len2; | |
4364 | ||
4365 | memset(&xpp, 0, sizeof(xpp)); | |
4366 | memset(&xecfg, 0, sizeof(xecfg)); | |
4367 | if (p->status == 0) | |
4368 | return error("internal diff status error"); | |
4369 | if (p->status == DIFF_STATUS_UNKNOWN) | |
4370 | continue; | |
4371 | if (diff_unmodified_pair(p)) | |
4372 | continue; | |
4373 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4374 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4375 | continue; | |
4376 | if (DIFF_PAIR_UNMERGED(p)) | |
4377 | continue; | |
4378 | ||
4379 | diff_fill_sha1_info(p->one); | |
4380 | diff_fill_sha1_info(p->two); | |
4381 | if (fill_mmfile(&mf1, p->one) < 0 || | |
4382 | fill_mmfile(&mf2, p->two) < 0) | |
4383 | return error("unable to read files to diff"); | |
4384 | ||
4385 | len1 = remove_space(p->one->path, strlen(p->one->path)); | |
4386 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
4387 | if (p->one->mode == 0) | |
4388 | len1 = snprintf(buffer, sizeof(buffer), | |
4389 | "diff--gita/%.*sb/%.*s" | |
4390 | "newfilemode%06o" | |
4391 | "---/dev/null" | |
4392 | "+++b/%.*s", | |
4393 | len1, p->one->path, | |
4394 | len2, p->two->path, | |
4395 | p->two->mode, | |
4396 | len2, p->two->path); | |
4397 | else if (p->two->mode == 0) | |
4398 | len1 = snprintf(buffer, sizeof(buffer), | |
4399 | "diff--gita/%.*sb/%.*s" | |
4400 | "deletedfilemode%06o" | |
4401 | "---a/%.*s" | |
4402 | "+++/dev/null", | |
4403 | len1, p->one->path, | |
4404 | len2, p->two->path, | |
4405 | p->one->mode, | |
4406 | len1, p->one->path); | |
4407 | else | |
4408 | len1 = snprintf(buffer, sizeof(buffer), | |
4409 | "diff--gita/%.*sb/%.*s" | |
4410 | "---a/%.*s" | |
4411 | "+++b/%.*s", | |
4412 | len1, p->one->path, | |
4413 | len2, p->two->path, | |
4414 | len1, p->one->path, | |
4415 | len2, p->two->path); | |
4416 | git_SHA1_Update(&ctx, buffer, len1); | |
4417 | ||
4418 | if (diff_filespec_is_binary(p->one) || | |
4419 | diff_filespec_is_binary(p->two)) { | |
4420 | git_SHA1_Update(&ctx, sha1_to_hex(p->one->sha1), 40); | |
4421 | git_SHA1_Update(&ctx, sha1_to_hex(p->two->sha1), 40); | |
4422 | continue; | |
4423 | } | |
4424 | ||
4425 | xpp.flags = 0; | |
4426 | xecfg.ctxlen = 3; | |
4427 | xecfg.flags = 0; | |
4428 | xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, | |
4429 | &xpp, &xecfg); | |
4430 | } | |
4431 | ||
4432 | git_SHA1_Final(sha1, &ctx); | |
4433 | return 0; | |
4434 | } | |
4435 | ||
4436 | int diff_flush_patch_id(struct diff_options *options, unsigned char *sha1) | |
4437 | { | |
4438 | struct diff_queue_struct *q = &diff_queued_diff; | |
4439 | int i; | |
4440 | int result = diff_get_patch_id(options, sha1); | |
4441 | ||
4442 | for (i = 0; i < q->nr; i++) | |
4443 | diff_free_filepair(q->queue[i]); | |
4444 | ||
4445 | free(q->queue); | |
4446 | DIFF_QUEUE_CLEAR(q); | |
4447 | ||
4448 | return result; | |
4449 | } | |
4450 | ||
4451 | static int is_summary_empty(const struct diff_queue_struct *q) | |
4452 | { | |
4453 | int i; | |
4454 | ||
4455 | for (i = 0; i < q->nr; i++) { | |
4456 | const struct diff_filepair *p = q->queue[i]; | |
4457 | ||
4458 | switch (p->status) { | |
4459 | case DIFF_STATUS_DELETED: | |
4460 | case DIFF_STATUS_ADDED: | |
4461 | case DIFF_STATUS_COPIED: | |
4462 | case DIFF_STATUS_RENAMED: | |
4463 | return 0; | |
4464 | default: | |
4465 | if (p->score) | |
4466 | return 0; | |
4467 | if (p->one->mode && p->two->mode && | |
4468 | p->one->mode != p->two->mode) | |
4469 | return 0; | |
4470 | break; | |
4471 | } | |
4472 | } | |
4473 | return 1; | |
4474 | } | |
4475 | ||
4476 | static const char rename_limit_warning[] = | |
4477 | "inexact rename detection was skipped due to too many files."; | |
4478 | ||
4479 | static const char degrade_cc_to_c_warning[] = | |
4480 | "only found copies from modified paths due to too many files."; | |
4481 | ||
4482 | static const char rename_limit_advice[] = | |
4483 | "you may want to set your %s variable to at least " | |
4484 | "%d and retry the command."; | |
4485 | ||
4486 | void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) | |
4487 | { | |
4488 | if (degraded_cc) | |
4489 | warning(degrade_cc_to_c_warning); | |
4490 | else if (needed) | |
4491 | warning(rename_limit_warning); | |
4492 | else | |
4493 | return; | |
4494 | if (0 < needed && needed < 32767) | |
4495 | warning(rename_limit_advice, varname, needed); | |
4496 | } | |
4497 | ||
4498 | void diff_flush(struct diff_options *options) | |
4499 | { | |
4500 | struct diff_queue_struct *q = &diff_queued_diff; | |
4501 | int i, output_format = options->output_format; | |
4502 | int separator = 0; | |
4503 | int dirstat_by_line = 0; | |
4504 | ||
4505 | /* | |
4506 | * Order: raw, stat, summary, patch | |
4507 | * or: name/name-status/checkdiff (other bits clear) | |
4508 | */ | |
4509 | if (!q->nr) | |
4510 | goto free_queue; | |
4511 | ||
4512 | if (output_format & (DIFF_FORMAT_RAW | | |
4513 | DIFF_FORMAT_NAME | | |
4514 | DIFF_FORMAT_NAME_STATUS | | |
4515 | DIFF_FORMAT_CHECKDIFF)) { | |
4516 | for (i = 0; i < q->nr; i++) { | |
4517 | struct diff_filepair *p = q->queue[i]; | |
4518 | if (check_pair_status(p)) | |
4519 | flush_one_pair(p, options); | |
4520 | } | |
4521 | separator++; | |
4522 | } | |
4523 | ||
4524 | if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) | |
4525 | dirstat_by_line = 1; | |
4526 | ||
4527 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || | |
4528 | dirstat_by_line) { | |
4529 | struct diffstat_t diffstat; | |
4530 | ||
4531 | memset(&diffstat, 0, sizeof(struct diffstat_t)); | |
4532 | for (i = 0; i < q->nr; i++) { | |
4533 | struct diff_filepair *p = q->queue[i]; | |
4534 | if (check_pair_status(p)) | |
4535 | diff_flush_stat(p, options, &diffstat); | |
4536 | } | |
4537 | if (output_format & DIFF_FORMAT_NUMSTAT) | |
4538 | show_numstat(&diffstat, options); | |
4539 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
4540 | show_stats(&diffstat, options); | |
4541 | if (output_format & DIFF_FORMAT_SHORTSTAT) | |
4542 | show_shortstats(&diffstat, options); | |
4543 | if (output_format & DIFF_FORMAT_DIRSTAT && dirstat_by_line) | |
4544 | show_dirstat_by_line(&diffstat, options); | |
4545 | free_diffstat_info(&diffstat); | |
4546 | separator++; | |
4547 | } | |
4548 | if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) | |
4549 | show_dirstat(options); | |
4550 | ||
4551 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { | |
4552 | for (i = 0; i < q->nr; i++) { | |
4553 | diff_summary(options, q->queue[i]); | |
4554 | } | |
4555 | separator++; | |
4556 | } | |
4557 | ||
4558 | if (output_format & DIFF_FORMAT_NO_OUTPUT && | |
4559 | DIFF_OPT_TST(options, EXIT_WITH_STATUS) && | |
4560 | DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4561 | /* | |
4562 | * run diff_flush_patch for the exit status. setting | |
4563 | * options->file to /dev/null should be safe, because we | |
4564 | * aren't supposed to produce any output anyway. | |
4565 | */ | |
4566 | if (options->close_file) | |
4567 | fclose(options->file); | |
4568 | options->file = fopen("/dev/null", "w"); | |
4569 | if (!options->file) | |
4570 | die_errno("Could not open /dev/null"); | |
4571 | options->close_file = 1; | |
4572 | for (i = 0; i < q->nr; i++) { | |
4573 | struct diff_filepair *p = q->queue[i]; | |
4574 | if (check_pair_status(p)) | |
4575 | diff_flush_patch(p, options); | |
4576 | if (options->found_changes) | |
4577 | break; | |
4578 | } | |
4579 | } | |
4580 | ||
4581 | if (output_format & DIFF_FORMAT_PATCH) { | |
4582 | if (separator) { | |
4583 | fprintf(options->file, "%s%c", | |
4584 | diff_line_prefix(options), | |
4585 | options->line_termination); | |
4586 | if (options->stat_sep) { | |
4587 | /* attach patch instead of inline */ | |
4588 | fputs(options->stat_sep, options->file); | |
4589 | } | |
4590 | } | |
4591 | ||
4592 | for (i = 0; i < q->nr; i++) { | |
4593 | struct diff_filepair *p = q->queue[i]; | |
4594 | if (check_pair_status(p)) | |
4595 | diff_flush_patch(p, options); | |
4596 | } | |
4597 | } | |
4598 | ||
4599 | if (output_format & DIFF_FORMAT_CALLBACK) | |
4600 | options->format_callback(q, options, options->format_callback_data); | |
4601 | ||
4602 | for (i = 0; i < q->nr; i++) | |
4603 | diff_free_filepair(q->queue[i]); | |
4604 | free_queue: | |
4605 | free(q->queue); | |
4606 | DIFF_QUEUE_CLEAR(q); | |
4607 | if (options->close_file) | |
4608 | fclose(options->file); | |
4609 | ||
4610 | /* | |
4611 | * Report the content-level differences with HAS_CHANGES; | |
4612 | * diff_addremove/diff_change does not set the bit when | |
4613 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
4614 | */ | |
4615 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4616 | if (options->found_changes) | |
4617 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4618 | else | |
4619 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4620 | } | |
4621 | } | |
4622 | ||
4623 | static int match_filter(const struct diff_options *options, const struct diff_filepair *p) | |
4624 | { | |
4625 | return (((p->status == DIFF_STATUS_MODIFIED) && | |
4626 | ((p->score && | |
4627 | filter_bit_tst(DIFF_STATUS_FILTER_BROKEN, options)) || | |
4628 | (!p->score && | |
4629 | filter_bit_tst(DIFF_STATUS_MODIFIED, options)))) || | |
4630 | ((p->status != DIFF_STATUS_MODIFIED) && | |
4631 | filter_bit_tst(p->status, options))); | |
4632 | } | |
4633 | ||
4634 | static void diffcore_apply_filter(struct diff_options *options) | |
4635 | { | |
4636 | int i; | |
4637 | struct diff_queue_struct *q = &diff_queued_diff; | |
4638 | struct diff_queue_struct outq; | |
4639 | ||
4640 | DIFF_QUEUE_CLEAR(&outq); | |
4641 | ||
4642 | if (!options->filter) | |
4643 | return; | |
4644 | ||
4645 | if (filter_bit_tst(DIFF_STATUS_FILTER_AON, options)) { | |
4646 | int found; | |
4647 | for (i = found = 0; !found && i < q->nr; i++) { | |
4648 | if (match_filter(options, q->queue[i])) | |
4649 | found++; | |
4650 | } | |
4651 | if (found) | |
4652 | return; | |
4653 | ||
4654 | /* otherwise we will clear the whole queue | |
4655 | * by copying the empty outq at the end of this | |
4656 | * function, but first clear the current entries | |
4657 | * in the queue. | |
4658 | */ | |
4659 | for (i = 0; i < q->nr; i++) | |
4660 | diff_free_filepair(q->queue[i]); | |
4661 | } | |
4662 | else { | |
4663 | /* Only the matching ones */ | |
4664 | for (i = 0; i < q->nr; i++) { | |
4665 | struct diff_filepair *p = q->queue[i]; | |
4666 | if (match_filter(options, p)) | |
4667 | diff_q(&outq, p); | |
4668 | else | |
4669 | diff_free_filepair(p); | |
4670 | } | |
4671 | } | |
4672 | free(q->queue); | |
4673 | *q = outq; | |
4674 | } | |
4675 | ||
4676 | /* Check whether two filespecs with the same mode and size are identical */ | |
4677 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
4678 | struct diff_filespec *two) | |
4679 | { | |
4680 | if (S_ISGITLINK(one->mode)) | |
4681 | return 0; | |
4682 | if (diff_populate_filespec(one, 0)) | |
4683 | return 0; | |
4684 | if (diff_populate_filespec(two, 0)) | |
4685 | return 0; | |
4686 | return !memcmp(one->data, two->data, one->size); | |
4687 | } | |
4688 | ||
4689 | static int diff_filespec_check_stat_unmatch(struct diff_filepair *p) | |
4690 | { | |
4691 | if (p->done_skip_stat_unmatch) | |
4692 | return p->skip_stat_unmatch_result; | |
4693 | ||
4694 | p->done_skip_stat_unmatch = 1; | |
4695 | p->skip_stat_unmatch_result = 0; | |
4696 | /* | |
4697 | * 1. Entries that come from stat info dirtiness | |
4698 | * always have both sides (iow, not create/delete), | |
4699 | * one side of the object name is unknown, with | |
4700 | * the same mode and size. Keep the ones that | |
4701 | * do not match these criteria. They have real | |
4702 | * differences. | |
4703 | * | |
4704 | * 2. At this point, the file is known to be modified, | |
4705 | * with the same mode and size, and the object | |
4706 | * name of one side is unknown. Need to inspect | |
4707 | * the identical contents. | |
4708 | */ | |
4709 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
4710 | !DIFF_FILE_VALID(p->two) || | |
4711 | (p->one->sha1_valid && p->two->sha1_valid) || | |
4712 | (p->one->mode != p->two->mode) || | |
4713 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY) || | |
4714 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY) || | |
4715 | (p->one->size != p->two->size) || | |
4716 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ | |
4717 | p->skip_stat_unmatch_result = 1; | |
4718 | return p->skip_stat_unmatch_result; | |
4719 | } | |
4720 | ||
4721 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) | |
4722 | { | |
4723 | int i; | |
4724 | struct diff_queue_struct *q = &diff_queued_diff; | |
4725 | struct diff_queue_struct outq; | |
4726 | DIFF_QUEUE_CLEAR(&outq); | |
4727 | ||
4728 | for (i = 0; i < q->nr; i++) { | |
4729 | struct diff_filepair *p = q->queue[i]; | |
4730 | ||
4731 | if (diff_filespec_check_stat_unmatch(p)) | |
4732 | diff_q(&outq, p); | |
4733 | else { | |
4734 | /* | |
4735 | * The caller can subtract 1 from skip_stat_unmatch | |
4736 | * to determine how many paths were dirty only | |
4737 | * due to stat info mismatch. | |
4738 | */ | |
4739 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) | |
4740 | diffopt->skip_stat_unmatch++; | |
4741 | diff_free_filepair(p); | |
4742 | } | |
4743 | } | |
4744 | free(q->queue); | |
4745 | *q = outq; | |
4746 | } | |
4747 | ||
4748 | static int diffnamecmp(const void *a_, const void *b_) | |
4749 | { | |
4750 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
4751 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
4752 | const char *name_a, *name_b; | |
4753 | ||
4754 | name_a = a->one ? a->one->path : a->two->path; | |
4755 | name_b = b->one ? b->one->path : b->two->path; | |
4756 | return strcmp(name_a, name_b); | |
4757 | } | |
4758 | ||
4759 | void diffcore_fix_diff_index(struct diff_options *options) | |
4760 | { | |
4761 | struct diff_queue_struct *q = &diff_queued_diff; | |
4762 | qsort(q->queue, q->nr, sizeof(q->queue[0]), diffnamecmp); | |
4763 | } | |
4764 | ||
4765 | void diffcore_std(struct diff_options *options) | |
4766 | { | |
4767 | /* NOTE please keep the following in sync with diff_tree_combined() */ | |
4768 | if (options->skip_stat_unmatch) | |
4769 | diffcore_skip_stat_unmatch(options); | |
4770 | if (!options->found_follow) { | |
4771 | /* See try_to_follow_renames() in tree-diff.c */ | |
4772 | if (options->break_opt != -1) | |
4773 | diffcore_break(options->break_opt); | |
4774 | if (options->detect_rename) | |
4775 | diffcore_rename(options); | |
4776 | if (options->break_opt != -1) | |
4777 | diffcore_merge_broken(); | |
4778 | } | |
4779 | if (options->pickaxe) | |
4780 | diffcore_pickaxe(options); | |
4781 | if (options->orderfile) | |
4782 | diffcore_order(options->orderfile); | |
4783 | if (!options->found_follow) | |
4784 | /* See try_to_follow_renames() in tree-diff.c */ | |
4785 | diff_resolve_rename_copy(); | |
4786 | diffcore_apply_filter(options); | |
4787 | ||
4788 | if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) | |
4789 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4790 | else | |
4791 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4792 | ||
4793 | options->found_follow = 0; | |
4794 | } | |
4795 | ||
4796 | int diff_result_code(struct diff_options *opt, int status) | |
4797 | { | |
4798 | int result = 0; | |
4799 | ||
4800 | diff_warn_rename_limit("diff.renameLimit", | |
4801 | opt->needed_rename_limit, | |
4802 | opt->degraded_cc_to_c); | |
4803 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4804 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
4805 | return status; | |
4806 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
4807 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
4808 | result |= 01; | |
4809 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
4810 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
4811 | result |= 02; | |
4812 | return result; | |
4813 | } | |
4814 | ||
4815 | int diff_can_quit_early(struct diff_options *opt) | |
4816 | { | |
4817 | return (DIFF_OPT_TST(opt, QUICK) && | |
4818 | !opt->filter && | |
4819 | DIFF_OPT_TST(opt, HAS_CHANGES)); | |
4820 | } | |
4821 | ||
4822 | /* | |
4823 | * Shall changes to this submodule be ignored? | |
4824 | * | |
4825 | * Submodule changes can be configured to be ignored separately for each path, | |
4826 | * but that configuration can be overridden from the command line. | |
4827 | */ | |
4828 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
4829 | { | |
4830 | int ignored = 0; | |
4831 | unsigned orig_flags = options->flags; | |
4832 | if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) | |
4833 | set_diffopt_flags_from_submodule_config(options, path); | |
4834 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) | |
4835 | ignored = 1; | |
4836 | options->flags = orig_flags; | |
4837 | return ignored; | |
4838 | } | |
4839 | ||
4840 | void diff_addremove(struct diff_options *options, | |
4841 | int addremove, unsigned mode, | |
4842 | const unsigned char *sha1, | |
4843 | int sha1_valid, | |
4844 | const char *concatpath, unsigned dirty_submodule) | |
4845 | { | |
4846 | struct diff_filespec *one, *two; | |
4847 | ||
4848 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) | |
4849 | return; | |
4850 | ||
4851 | /* This may look odd, but it is a preparation for | |
4852 | * feeding "there are unchanged files which should | |
4853 | * not produce diffs, but when you are doing copy | |
4854 | * detection you would need them, so here they are" | |
4855 | * entries to the diff-core. They will be prefixed | |
4856 | * with something like '=' or '*' (I haven't decided | |
4857 | * which but should not make any difference). | |
4858 | * Feeding the same new and old to diff_change() | |
4859 | * also has the same effect. | |
4860 | * Before the final output happens, they are pruned after | |
4861 | * merged into rename/copy pairs as appropriate. | |
4862 | */ | |
4863 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) | |
4864 | addremove = (addremove == '+' ? '-' : | |
4865 | addremove == '-' ? '+' : addremove); | |
4866 | ||
4867 | if (options->prefix && | |
4868 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4869 | return; | |
4870 | ||
4871 | one = alloc_filespec(concatpath); | |
4872 | two = alloc_filespec(concatpath); | |
4873 | ||
4874 | if (addremove != '+') | |
4875 | fill_filespec(one, sha1, sha1_valid, mode); | |
4876 | if (addremove != '-') { | |
4877 | fill_filespec(two, sha1, sha1_valid, mode); | |
4878 | two->dirty_submodule = dirty_submodule; | |
4879 | } | |
4880 | ||
4881 | diff_queue(&diff_queued_diff, one, two); | |
4882 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) | |
4883 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4884 | } | |
4885 | ||
4886 | void diff_change(struct diff_options *options, | |
4887 | unsigned old_mode, unsigned new_mode, | |
4888 | const unsigned char *old_sha1, | |
4889 | const unsigned char *new_sha1, | |
4890 | int old_sha1_valid, int new_sha1_valid, | |
4891 | const char *concatpath, | |
4892 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
4893 | { | |
4894 | struct diff_filespec *one, *two; | |
4895 | struct diff_filepair *p; | |
4896 | ||
4897 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && | |
4898 | is_submodule_ignored(concatpath, options)) | |
4899 | return; | |
4900 | ||
4901 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { | |
4902 | unsigned tmp; | |
4903 | const unsigned char *tmp_c; | |
4904 | tmp = old_mode; old_mode = new_mode; new_mode = tmp; | |
4905 | tmp_c = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_c; | |
4906 | tmp = old_sha1_valid; old_sha1_valid = new_sha1_valid; | |
4907 | new_sha1_valid = tmp; | |
4908 | tmp = old_dirty_submodule; old_dirty_submodule = new_dirty_submodule; | |
4909 | new_dirty_submodule = tmp; | |
4910 | } | |
4911 | ||
4912 | if (options->prefix && | |
4913 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
4914 | return; | |
4915 | ||
4916 | one = alloc_filespec(concatpath); | |
4917 | two = alloc_filespec(concatpath); | |
4918 | fill_filespec(one, old_sha1, old_sha1_valid, old_mode); | |
4919 | fill_filespec(two, new_sha1, new_sha1_valid, new_mode); | |
4920 | one->dirty_submodule = old_dirty_submodule; | |
4921 | two->dirty_submodule = new_dirty_submodule; | |
4922 | p = diff_queue(&diff_queued_diff, one, two); | |
4923 | ||
4924 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) | |
4925 | return; | |
4926 | ||
4927 | if (DIFF_OPT_TST(options, QUICK) && options->skip_stat_unmatch && | |
4928 | !diff_filespec_check_stat_unmatch(p)) | |
4929 | return; | |
4930 | ||
4931 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4932 | } | |
4933 | ||
4934 | struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) | |
4935 | { | |
4936 | struct diff_filepair *pair; | |
4937 | struct diff_filespec *one, *two; | |
4938 | ||
4939 | if (options->prefix && | |
4940 | strncmp(path, options->prefix, options->prefix_length)) | |
4941 | return NULL; | |
4942 | ||
4943 | one = alloc_filespec(path); | |
4944 | two = alloc_filespec(path); | |
4945 | pair = diff_queue(&diff_queued_diff, one, two); | |
4946 | pair->is_unmerged = 1; | |
4947 | return pair; | |
4948 | } | |
4949 | ||
4950 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
4951 | size_t *outsize) | |
4952 | { | |
4953 | struct diff_tempfile *temp; | |
4954 | const char *argv[3]; | |
4955 | const char **arg = argv; | |
4956 | struct child_process child = CHILD_PROCESS_INIT; | |
4957 | struct strbuf buf = STRBUF_INIT; | |
4958 | int err = 0; | |
4959 | ||
4960 | temp = prepare_temp_file(spec->path, spec); | |
4961 | *arg++ = pgm; | |
4962 | *arg++ = temp->name; | |
4963 | *arg = NULL; | |
4964 | ||
4965 | child.use_shell = 1; | |
4966 | child.argv = argv; | |
4967 | child.out = -1; | |
4968 | if (start_command(&child)) { | |
4969 | remove_tempfile(); | |
4970 | return NULL; | |
4971 | } | |
4972 | ||
4973 | if (strbuf_read(&buf, child.out, 0) < 0) | |
4974 | err = error("error reading from textconv command '%s'", pgm); | |
4975 | close(child.out); | |
4976 | ||
4977 | if (finish_command(&child) || err) { | |
4978 | strbuf_release(&buf); | |
4979 | remove_tempfile(); | |
4980 | return NULL; | |
4981 | } | |
4982 | remove_tempfile(); | |
4983 | ||
4984 | return strbuf_detach(&buf, outsize); | |
4985 | } | |
4986 | ||
4987 | size_t fill_textconv(struct userdiff_driver *driver, | |
4988 | struct diff_filespec *df, | |
4989 | char **outbuf) | |
4990 | { | |
4991 | size_t size; | |
4992 | ||
4993 | if (!driver || !driver->textconv) { | |
4994 | if (!DIFF_FILE_VALID(df)) { | |
4995 | *outbuf = ""; | |
4996 | return 0; | |
4997 | } | |
4998 | if (diff_populate_filespec(df, 0)) | |
4999 | die("unable to read files to diff"); | |
5000 | *outbuf = df->data; | |
5001 | return df->size; | |
5002 | } | |
5003 | ||
5004 | if (driver->textconv_cache && df->sha1_valid) { | |
5005 | *outbuf = notes_cache_get(driver->textconv_cache, df->sha1, | |
5006 | &size); | |
5007 | if (*outbuf) | |
5008 | return size; | |
5009 | } | |
5010 | ||
5011 | *outbuf = run_textconv(driver->textconv, df, &size); | |
5012 | if (!*outbuf) | |
5013 | die("unable to read files to diff"); | |
5014 | ||
5015 | if (driver->textconv_cache && df->sha1_valid) { | |
5016 | /* ignore errors, as we might be in a readonly repository */ | |
5017 | notes_cache_put(driver->textconv_cache, df->sha1, *outbuf, | |
5018 | size); | |
5019 | /* | |
5020 | * we could save up changes and flush them all at the end, | |
5021 | * but we would need an extra call after all diffing is done. | |
5022 | * Since generating a cache entry is the slow path anyway, | |
5023 | * this extra overhead probably isn't a big deal. | |
5024 | */ | |
5025 | notes_cache_write(driver->textconv_cache); | |
5026 | } | |
5027 | ||
5028 | return size; | |
5029 | } | |
5030 | ||
5031 | void setup_diff_pager(struct diff_options *opt) | |
5032 | { | |
5033 | /* | |
5034 | * If the user asked for our exit code, then either they want --quiet | |
5035 | * or --exit-code. We should definitely not bother with a pager in the | |
5036 | * former case, as we will generate no output. Since we still properly | |
5037 | * report our exit code even when a pager is run, we _could_ run a | |
5038 | * pager with --exit-code. But since we have not done so historically, | |
5039 | * and because it is easy to find people oneline advising "git diff | |
5040 | * --exit-code" in hooks and other scripts, we do not do so. | |
5041 | */ | |
5042 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
5043 | check_pager_config("diff") != 0) | |
5044 | setup_pager(); | |
5045 | } |