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Commit | Line | Data |
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6973dcae JH |
1 | /* |
2 | * Copyright (C) 2005 Junio C Hamano | |
3 | */ | |
6973dcae | 4 | #include "cache.h" |
b2141fc1 | 5 | #include "config.h" |
284098f1 | 6 | #include "tempfile.h" |
6973dcae JH |
7 | #include "quote.h" |
8 | #include "diff.h" | |
9 | #include "diffcore.h" | |
051308f6 | 10 | #include "delta.h" |
6973dcae | 11 | #include "xdiff-interface.h" |
7c92fe0e | 12 | #include "color.h" |
8c701249 | 13 | #include "attr.h" |
d5535ec7 | 14 | #include "run-command.h" |
23707811 | 15 | #include "utf8.h" |
be58e70d | 16 | #include "userdiff.h" |
851e18c3 | 17 | #include "submodule-config.h" |
752c0c24 | 18 | #include "submodule.h" |
a757c646 | 19 | #include "ll-merge.h" |
02e8ca0e | 20 | #include "string-list.h" |
82fbf269 | 21 | #include "argv-array.h" |
660e113c | 22 | #include "graph.h" |
6973dcae | 23 | |
1510fea7 SP |
24 | #ifdef NO_FAST_WORKING_DIRECTORY |
25 | #define FAST_WORKING_DIRECTORY 0 | |
26 | #else | |
27 | #define FAST_WORKING_DIRECTORY 1 | |
28 | #endif | |
29 | ||
96f1e58f | 30 | static int diff_detect_rename_default; |
33de7163 | 31 | static int diff_indent_heuristic = 1; |
92c57e5c | 32 | static int diff_rename_limit_default = 400; |
a624eaa7 | 33 | static int diff_suppress_blank_empty; |
d2aea137 | 34 | static int diff_use_color_default = -1; |
6468a4e5 | 35 | static int diff_context_default = 3; |
c4888677 | 36 | static int diff_interhunk_context_default; |
98a4d87b | 37 | static const char *diff_word_regex_cfg; |
cbe02100 | 38 | static const char *external_diff_cmd_cfg; |
6d8940b5 | 39 | static const char *diff_order_file_cfg; |
aecbf914 | 40 | int diff_auto_refresh_index = 1; |
a5a818ee | 41 | static int diff_mnemonic_prefix; |
f89504dd | 42 | static int diff_no_prefix; |
df44483a | 43 | static int diff_stat_graph_width; |
712d2c7d | 44 | static int diff_dirstat_permille_default = 30; |
be4f2b40 | 45 | static struct diff_options default_diff_options; |
07ab4dec | 46 | static long diff_algorithm; |
a17505f2 | 47 | static unsigned ws_error_highlight_default = WSEH_NEW; |
6973dcae | 48 | |
7c92fe0e | 49 | static char diff_colors[][COLOR_MAXLEN] = { |
dc6ebd4c | 50 | GIT_COLOR_RESET, |
8dbf3eb6 | 51 | GIT_COLOR_NORMAL, /* CONTEXT */ |
dc6ebd4c AL |
52 | GIT_COLOR_BOLD, /* METAINFO */ |
53 | GIT_COLOR_CYAN, /* FRAGINFO */ | |
54 | GIT_COLOR_RED, /* OLD */ | |
55 | GIT_COLOR_GREEN, /* NEW */ | |
56 | GIT_COLOR_YELLOW, /* COMMIT */ | |
57 | GIT_COLOR_BG_RED, /* WHITESPACE */ | |
89cb73a1 | 58 | GIT_COLOR_NORMAL, /* FUNCINFO */ |
cd112cef JS |
59 | }; |
60 | ||
a2f05c94 JNA |
61 | static NORETURN void die_want_option(const char *option_name) |
62 | { | |
63 | die(_("option '%s' requires a value"), option_name); | |
64 | } | |
65 | ||
9e1a5ebe | 66 | static int parse_diff_color_slot(const char *var) |
801235c5 | 67 | { |
74b15bfb | 68 | if (!strcasecmp(var, "context") || !strcasecmp(var, "plain")) |
8dbf3eb6 | 69 | return DIFF_CONTEXT; |
9e1a5ebe | 70 | if (!strcasecmp(var, "meta")) |
801235c5 | 71 | return DIFF_METAINFO; |
9e1a5ebe | 72 | if (!strcasecmp(var, "frag")) |
801235c5 | 73 | return DIFF_FRAGINFO; |
9e1a5ebe | 74 | if (!strcasecmp(var, "old")) |
801235c5 | 75 | return DIFF_FILE_OLD; |
9e1a5ebe | 76 | if (!strcasecmp(var, "new")) |
801235c5 | 77 | return DIFF_FILE_NEW; |
9e1a5ebe | 78 | if (!strcasecmp(var, "commit")) |
ce436973 | 79 | return DIFF_COMMIT; |
9e1a5ebe | 80 | if (!strcasecmp(var, "whitespace")) |
448c3ef1 | 81 | return DIFF_WHITESPACE; |
9e1a5ebe | 82 | if (!strcasecmp(var, "func")) |
89cb73a1 | 83 | return DIFF_FUNCINFO; |
8b8e8624 | 84 | return -1; |
801235c5 JH |
85 | } |
86 | ||
02e8ca0e | 87 | static int parse_dirstat_params(struct diff_options *options, const char *params_string, |
51670fc8 | 88 | struct strbuf *errmsg) |
333f3fb0 | 89 | { |
02e8ca0e MH |
90 | char *params_copy = xstrdup(params_string); |
91 | struct string_list params = STRING_LIST_INIT_NODUP; | |
92 | int ret = 0; | |
93 | int i; | |
51670fc8 | 94 | |
02e8ca0e MH |
95 | if (*params_copy) |
96 | string_list_split_in_place(¶ms, params_copy, ',', -1); | |
97 | for (i = 0; i < params.nr; i++) { | |
98 | const char *p = params.items[i].string; | |
99 | if (!strcmp(p, "changes")) { | |
1c57a627 JH |
100 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
101 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); | |
02e8ca0e | 102 | } else if (!strcmp(p, "lines")) { |
1c57a627 | 103 | DIFF_OPT_SET(options, DIRSTAT_BY_LINE); |
333f3fb0 | 104 | DIFF_OPT_CLR(options, DIRSTAT_BY_FILE); |
02e8ca0e | 105 | } else if (!strcmp(p, "files")) { |
1c57a627 | 106 | DIFF_OPT_CLR(options, DIRSTAT_BY_LINE); |
333f3fb0 | 107 | DIFF_OPT_SET(options, DIRSTAT_BY_FILE); |
02e8ca0e | 108 | } else if (!strcmp(p, "noncumulative")) { |
333f3fb0 | 109 | DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE); |
02e8ca0e | 110 | } else if (!strcmp(p, "cumulative")) { |
333f3fb0 JH |
111 | DIFF_OPT_SET(options, DIRSTAT_CUMULATIVE); |
112 | } else if (isdigit(*p)) { | |
113 | char *end; | |
51670fc8 JH |
114 | int permille = strtoul(p, &end, 10) * 10; |
115 | if (*end == '.' && isdigit(*++end)) { | |
712d2c7d | 116 | /* only use first digit */ |
51670fc8 | 117 | permille += *end - '0'; |
712d2c7d | 118 | /* .. and ignore any further digits */ |
51670fc8 | 119 | while (isdigit(*++end)) |
712d2c7d JH |
120 | ; /* nothing */ |
121 | } | |
02e8ca0e | 122 | if (!*end) |
51670fc8 JH |
123 | options->dirstat_permille = permille; |
124 | else { | |
02e8ca0e MH |
125 | strbuf_addf(errmsg, _(" Failed to parse dirstat cut-off percentage '%s'\n"), |
126 | p); | |
51670fc8 JH |
127 | ret++; |
128 | } | |
129 | } else { | |
02e8ca0e | 130 | strbuf_addf(errmsg, _(" Unknown dirstat parameter '%s'\n"), p); |
51670fc8 | 131 | ret++; |
333f3fb0 | 132 | } |
51670fc8 | 133 | |
333f3fb0 | 134 | } |
02e8ca0e MH |
135 | string_list_clear(¶ms, 0); |
136 | free(params_copy); | |
51670fc8 | 137 | return ret; |
333f3fb0 JH |
138 | } |
139 | ||
c47ef57c RR |
140 | static int parse_submodule_params(struct diff_options *options, const char *value) |
141 | { | |
142 | if (!strcmp(value, "log")) | |
61cfbc05 | 143 | options->submodule_format = DIFF_SUBMODULE_LOG; |
c47ef57c | 144 | else if (!strcmp(value, "short")) |
61cfbc05 | 145 | options->submodule_format = DIFF_SUBMODULE_SHORT; |
fd47ae6a JK |
146 | else if (!strcmp(value, "diff")) |
147 | options->submodule_format = DIFF_SUBMODULE_INLINE_DIFF; | |
c47ef57c RR |
148 | else |
149 | return -1; | |
150 | return 0; | |
151 | } | |
152 | ||
cced5fbc LT |
153 | static int git_config_rename(const char *var, const char *value) |
154 | { | |
155 | if (!value) | |
156 | return DIFF_DETECT_RENAME; | |
157 | if (!strcasecmp(value, "copies") || !strcasecmp(value, "copy")) | |
158 | return DIFF_DETECT_COPY; | |
159 | return git_config_bool(var,value) ? DIFF_DETECT_RENAME : 0; | |
160 | } | |
161 | ||
07924d4d | 162 | long parse_algorithm_value(const char *value) |
07ab4dec MP |
163 | { |
164 | if (!value) | |
165 | return -1; | |
166 | else if (!strcasecmp(value, "myers") || !strcasecmp(value, "default")) | |
167 | return 0; | |
168 | else if (!strcasecmp(value, "minimal")) | |
169 | return XDF_NEED_MINIMAL; | |
170 | else if (!strcasecmp(value, "patience")) | |
171 | return XDF_PATIENCE_DIFF; | |
172 | else if (!strcasecmp(value, "histogram")) | |
173 | return XDF_HISTOGRAM_DIFF; | |
174 | return -1; | |
175 | } | |
176 | ||
0b4b42e7 JH |
177 | static int parse_one_token(const char **arg, const char *token) |
178 | { | |
179 | const char *rest; | |
180 | if (skip_prefix(*arg, token, &rest) && (!*rest || *rest == ',')) { | |
181 | *arg = rest; | |
182 | return 1; | |
183 | } | |
184 | return 0; | |
185 | } | |
186 | ||
187 | static int parse_ws_error_highlight(const char *arg) | |
188 | { | |
189 | const char *orig_arg = arg; | |
190 | unsigned val = 0; | |
191 | ||
192 | while (*arg) { | |
193 | if (parse_one_token(&arg, "none")) | |
194 | val = 0; | |
195 | else if (parse_one_token(&arg, "default")) | |
196 | val = WSEH_NEW; | |
197 | else if (parse_one_token(&arg, "all")) | |
198 | val = WSEH_NEW | WSEH_OLD | WSEH_CONTEXT; | |
199 | else if (parse_one_token(&arg, "new")) | |
200 | val |= WSEH_NEW; | |
201 | else if (parse_one_token(&arg, "old")) | |
202 | val |= WSEH_OLD; | |
203 | else if (parse_one_token(&arg, "context")) | |
204 | val |= WSEH_CONTEXT; | |
205 | else { | |
206 | return -1 - (int)(arg - orig_arg); | |
207 | } | |
208 | if (*arg) | |
209 | arg++; | |
210 | } | |
211 | return val; | |
212 | } | |
213 | ||
83ad63cf JH |
214 | /* |
215 | * These are to give UI layer defaults. | |
216 | * The core-level commands such as git-diff-files should | |
217 | * never be affected by the setting of diff.renames | |
218 | * the user happens to have in the configuration file. | |
219 | */ | |
5404c116 MM |
220 | void init_diff_ui_defaults(void) |
221 | { | |
222 | diff_detect_rename_default = 1; | |
223 | } | |
224 | ||
5b162879 MH |
225 | int git_diff_heuristic_config(const char *var, const char *value, void *cb) |
226 | { | |
3cde4e02 | 227 | if (!strcmp(var, "diff.indentheuristic")) |
5b162879 | 228 | diff_indent_heuristic = git_config_bool(var, value); |
5b162879 MH |
229 | return 0; |
230 | } | |
231 | ||
ef90d6d4 | 232 | int git_diff_ui_config(const char *var, const char *value, void *cb) |
801235c5 | 233 | { |
a159ca0c | 234 | if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) { |
e269eb79 | 235 | diff_use_color_default = git_config_colorbool(var, value); |
801235c5 JH |
236 | return 0; |
237 | } | |
6468a4e5 JM |
238 | if (!strcmp(var, "diff.context")) { |
239 | diff_context_default = git_config_int(var, value); | |
240 | if (diff_context_default < 0) | |
241 | return -1; | |
242 | return 0; | |
243 | } | |
c4888677 VN |
244 | if (!strcmp(var, "diff.interhunkcontext")) { |
245 | diff_interhunk_context_default = git_config_int(var, value); | |
246 | if (diff_interhunk_context_default < 0) | |
247 | return -1; | |
248 | return 0; | |
249 | } | |
b68ea12e | 250 | if (!strcmp(var, "diff.renames")) { |
cced5fbc | 251 | diff_detect_rename_default = git_config_rename(var, value); |
b68ea12e EW |
252 | return 0; |
253 | } | |
aecbf914 JH |
254 | if (!strcmp(var, "diff.autorefreshindex")) { |
255 | diff_auto_refresh_index = git_config_bool(var, value); | |
256 | return 0; | |
257 | } | |
a5a818ee JH |
258 | if (!strcmp(var, "diff.mnemonicprefix")) { |
259 | diff_mnemonic_prefix = git_config_bool(var, value); | |
260 | return 0; | |
261 | } | |
f89504dd EC |
262 | if (!strcmp(var, "diff.noprefix")) { |
263 | diff_no_prefix = git_config_bool(var, value); | |
264 | return 0; | |
265 | } | |
df44483a ZJS |
266 | if (!strcmp(var, "diff.statgraphwidth")) { |
267 | diff_stat_graph_width = git_config_int(var, value); | |
268 | return 0; | |
269 | } | |
daec808c BH |
270 | if (!strcmp(var, "diff.external")) |
271 | return git_config_string(&external_diff_cmd_cfg, var, value); | |
98a4d87b BSSJ |
272 | if (!strcmp(var, "diff.wordregex")) |
273 | return git_config_string(&diff_word_regex_cfg, var, value); | |
6d8940b5 SB |
274 | if (!strcmp(var, "diff.orderfile")) |
275 | return git_config_pathname(&diff_order_file_cfg, var, value); | |
f1af60bd | 276 | |
be4f2b40 JS |
277 | if (!strcmp(var, "diff.ignoresubmodules")) |
278 | handle_ignore_submodules_arg(&default_diff_options, value); | |
279 | ||
c47ef57c RR |
280 | if (!strcmp(var, "diff.submodule")) { |
281 | if (parse_submodule_params(&default_diff_options, value)) | |
282 | warning(_("Unknown value for 'diff.submodule' config variable: '%s'"), | |
283 | value); | |
284 | return 0; | |
285 | } | |
286 | ||
07ab4dec MP |
287 | if (!strcmp(var, "diff.algorithm")) { |
288 | diff_algorithm = parse_algorithm_value(value); | |
289 | if (diff_algorithm < 0) | |
290 | return -1; | |
291 | return 0; | |
292 | } | |
293 | ||
a17505f2 JH |
294 | if (!strcmp(var, "diff.wserrorhighlight")) { |
295 | int val = parse_ws_error_highlight(value); | |
296 | if (val < 0) | |
297 | return -1; | |
298 | ws_error_highlight_default = val; | |
299 | return 0; | |
300 | } | |
301 | ||
3e1dd17a JK |
302 | if (git_color_config(var, value, cb) < 0) |
303 | return -1; | |
304 | ||
ef90d6d4 | 305 | return git_diff_basic_config(var, value, cb); |
9a1805a8 JK |
306 | } |
307 | ||
ef90d6d4 | 308 | int git_diff_basic_config(const char *var, const char *value, void *cb) |
9a1805a8 | 309 | { |
ae021d87 JK |
310 | const char *name; |
311 | ||
2b6ca6df LT |
312 | if (!strcmp(var, "diff.renamelimit")) { |
313 | diff_rename_limit_default = git_config_int(var, value); | |
314 | return 0; | |
315 | } | |
316 | ||
6680a087 JK |
317 | if (userdiff_config(var, value) < 0) |
318 | return -1; | |
c7534ef4 | 319 | |
ae021d87 JK |
320 | if (skip_prefix(var, "diff.color.", &name) || |
321 | skip_prefix(var, "color.diff.", &name)) { | |
322 | int slot = parse_diff_color_slot(name); | |
8b8e8624 JK |
323 | if (slot < 0) |
324 | return 0; | |
64f30e94 JH |
325 | if (!value) |
326 | return config_error_nonbool(var); | |
f6c5a296 | 327 | return color_parse(value, diff_colors[slot]); |
801235c5 | 328 | } |
f1af60bd | 329 | |
a624eaa7 | 330 | /* like GNU diff's --suppress-blank-empty option */ |
950db879 JS |
331 | if (!strcmp(var, "diff.suppressblankempty") || |
332 | /* for backwards compatibility */ | |
333 | !strcmp(var, "diff.suppress-blank-empty")) { | |
a624eaa7 JM |
334 | diff_suppress_blank_empty = git_config_bool(var, value); |
335 | return 0; | |
336 | } | |
337 | ||
2d174951 | 338 | if (!strcmp(var, "diff.dirstat")) { |
51670fc8 | 339 | struct strbuf errmsg = STRBUF_INIT; |
712d2c7d | 340 | default_diff_options.dirstat_permille = diff_dirstat_permille_default; |
51670fc8 | 341 | if (parse_dirstat_params(&default_diff_options, value, &errmsg)) |
7478ac57 | 342 | warning(_("Found errors in 'diff.dirstat' config variable:\n%s"), |
51670fc8 JH |
343 | errmsg.buf); |
344 | strbuf_release(&errmsg); | |
712d2c7d | 345 | diff_dirstat_permille_default = default_diff_options.dirstat_permille; |
2d174951 JH |
346 | return 0; |
347 | } | |
348 | ||
59556548 | 349 | if (starts_with(var, "submodule.")) |
aee9c7d6 JL |
350 | return parse_submodule_config_option(var, value); |
351 | ||
cf5e7722 MB |
352 | if (git_diff_heuristic_config(var, value, cb) < 0) |
353 | return -1; | |
354 | ||
3e1dd17a | 355 | return git_default_config(var, value, cb); |
801235c5 JH |
356 | } |
357 | ||
6973dcae JH |
358 | static char *quote_two(const char *one, const char *two) |
359 | { | |
360 | int need_one = quote_c_style(one, NULL, NULL, 1); | |
361 | int need_two = quote_c_style(two, NULL, NULL, 1); | |
f285a2d7 | 362 | struct strbuf res = STRBUF_INIT; |
6973dcae JH |
363 | |
364 | if (need_one + need_two) { | |
663af342 PH |
365 | strbuf_addch(&res, '"'); |
366 | quote_c_style(one, &res, NULL, 1); | |
367 | quote_c_style(two, &res, NULL, 1); | |
368 | strbuf_addch(&res, '"'); | |
369 | } else { | |
370 | strbuf_addstr(&res, one); | |
371 | strbuf_addstr(&res, two); | |
6973dcae | 372 | } |
b315c5c0 | 373 | return strbuf_detach(&res, NULL); |
6973dcae JH |
374 | } |
375 | ||
376 | static const char *external_diff(void) | |
377 | { | |
378 | static const char *external_diff_cmd = NULL; | |
379 | static int done_preparing = 0; | |
380 | ||
381 | if (done_preparing) | |
382 | return external_diff_cmd; | |
383 | external_diff_cmd = getenv("GIT_EXTERNAL_DIFF"); | |
cbe02100 JS |
384 | if (!external_diff_cmd) |
385 | external_diff_cmd = external_diff_cmd_cfg; | |
6973dcae JH |
386 | done_preparing = 1; |
387 | return external_diff_cmd; | |
388 | } | |
389 | ||
284098f1 MH |
390 | /* |
391 | * Keep track of files used for diffing. Sometimes such an entry | |
392 | * refers to a temporary file, sometimes to an existing file, and | |
393 | * sometimes to "/dev/null". | |
394 | */ | |
6973dcae | 395 | static struct diff_tempfile { |
284098f1 MH |
396 | /* |
397 | * filename external diff should read from, or NULL if this | |
398 | * entry is currently not in use: | |
399 | */ | |
400 | const char *name; | |
401 | ||
dc01505f | 402 | char hex[GIT_MAX_HEXSZ + 1]; |
6973dcae | 403 | char mode[10]; |
284098f1 MH |
404 | |
405 | /* | |
406 | * If this diff_tempfile instance refers to a temporary file, | |
407 | * this tempfile object is used to manage its lifetime. | |
408 | */ | |
409 | struct tempfile tempfile; | |
6973dcae JH |
410 | } diff_temp[2]; |
411 | ||
6957eb9a JH |
412 | typedef unsigned long (*sane_truncate_fn)(char *line, unsigned long len); |
413 | ||
414 | struct emit_callback { | |
6957eb9a JH |
415 | int color_diff; |
416 | unsigned ws_rule; | |
417 | int blank_at_eof_in_preimage; | |
418 | int blank_at_eof_in_postimage; | |
419 | int lno_in_preimage; | |
420 | int lno_in_postimage; | |
421 | sane_truncate_fn truncate; | |
422 | const char **label_path; | |
423 | struct diff_words_data *diff_words; | |
a3c158d4 | 424 | struct diff_options *opt; |
3e97c7c6 | 425 | struct strbuf *header; |
6957eb9a JH |
426 | }; |
427 | ||
6973dcae JH |
428 | static int count_lines(const char *data, int size) |
429 | { | |
430 | int count, ch, completely_empty = 1, nl_just_seen = 0; | |
431 | count = 0; | |
432 | while (0 < size--) { | |
433 | ch = *data++; | |
434 | if (ch == '\n') { | |
435 | count++; | |
436 | nl_just_seen = 1; | |
437 | completely_empty = 0; | |
438 | } | |
439 | else { | |
440 | nl_just_seen = 0; | |
441 | completely_empty = 0; | |
442 | } | |
443 | } | |
444 | if (completely_empty) | |
445 | return 0; | |
446 | if (!nl_just_seen) | |
447 | count++; /* no trailing newline */ | |
448 | return count; | |
449 | } | |
450 | ||
6957eb9a JH |
451 | static int fill_mmfile(mmfile_t *mf, struct diff_filespec *one) |
452 | { | |
453 | if (!DIFF_FILE_VALID(one)) { | |
454 | mf->ptr = (char *)""; /* does not matter */ | |
455 | mf->size = 0; | |
456 | return 0; | |
457 | } | |
458 | else if (diff_populate_filespec(one, 0)) | |
459 | return -1; | |
bb35fefb | 460 | |
6957eb9a JH |
461 | mf->ptr = one->data; |
462 | mf->size = one->size; | |
463 | return 0; | |
464 | } | |
465 | ||
abb371a1 JK |
466 | /* like fill_mmfile, but only for size, so we can avoid retrieving blob */ |
467 | static unsigned long diff_filespec_size(struct diff_filespec *one) | |
468 | { | |
469 | if (!DIFF_FILE_VALID(one)) | |
470 | return 0; | |
8e5dd3d6 | 471 | diff_populate_filespec(one, CHECK_SIZE_ONLY); |
abb371a1 JK |
472 | return one->size; |
473 | } | |
474 | ||
6957eb9a JH |
475 | static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule) |
476 | { | |
477 | char *ptr = mf->ptr; | |
478 | long size = mf->size; | |
479 | int cnt = 0; | |
480 | ||
481 | if (!size) | |
482 | return cnt; | |
483 | ptr += size - 1; /* pointing at the very end */ | |
484 | if (*ptr != '\n') | |
485 | ; /* incomplete line */ | |
486 | else | |
487 | ptr--; /* skip the last LF */ | |
488 | while (mf->ptr < ptr) { | |
489 | char *prev_eol; | |
490 | for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--) | |
491 | if (*prev_eol == '\n') | |
492 | break; | |
493 | if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule)) | |
494 | break; | |
495 | cnt++; | |
496 | ptr = prev_eol - 1; | |
497 | } | |
498 | return cnt; | |
499 | } | |
500 | ||
501 | static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2, | |
502 | struct emit_callback *ecbdata) | |
503 | { | |
504 | int l1, l2, at; | |
505 | unsigned ws_rule = ecbdata->ws_rule; | |
506 | l1 = count_trailing_blank(mf1, ws_rule); | |
507 | l2 = count_trailing_blank(mf2, ws_rule); | |
508 | if (l2 <= l1) { | |
509 | ecbdata->blank_at_eof_in_preimage = 0; | |
510 | ecbdata->blank_at_eof_in_postimage = 0; | |
511 | return; | |
512 | } | |
513 | at = count_lines(mf1->ptr, mf1->size); | |
514 | ecbdata->blank_at_eof_in_preimage = (at - l1) + 1; | |
515 | ||
516 | at = count_lines(mf2->ptr, mf2->size); | |
517 | ecbdata->blank_at_eof_in_postimage = (at - l2) + 1; | |
518 | } | |
519 | ||
a3c158d4 | 520 | static void emit_line_0(struct diff_options *o, const char *set, const char *reset, |
250f7993 | 521 | int first, const char *line, int len) |
6957eb9a JH |
522 | { |
523 | int has_trailing_newline, has_trailing_carriage_return; | |
250f7993 | 524 | int nofirst; |
a3c158d4 BY |
525 | FILE *file = o->file; |
526 | ||
30997bb8 | 527 | fputs(diff_line_prefix(o), file); |
6957eb9a | 528 | |
250f7993 JH |
529 | if (len == 0) { |
530 | has_trailing_newline = (first == '\n'); | |
531 | has_trailing_carriage_return = (!has_trailing_newline && | |
532 | (first == '\r')); | |
533 | nofirst = has_trailing_newline || has_trailing_carriage_return; | |
534 | } else { | |
535 | has_trailing_newline = (len > 0 && line[len-1] == '\n'); | |
536 | if (has_trailing_newline) | |
537 | len--; | |
538 | has_trailing_carriage_return = (len > 0 && line[len-1] == '\r'); | |
539 | if (has_trailing_carriage_return) | |
540 | len--; | |
541 | nofirst = 0; | |
542 | } | |
6957eb9a | 543 | |
06a47552 JH |
544 | if (len || !nofirst) { |
545 | fputs(set, file); | |
546 | if (!nofirst) | |
547 | fputc(first, file); | |
548 | fwrite(line, len, 1, file); | |
549 | fputs(reset, file); | |
550 | } | |
6957eb9a JH |
551 | if (has_trailing_carriage_return) |
552 | fputc('\r', file); | |
553 | if (has_trailing_newline) | |
554 | fputc('\n', file); | |
555 | } | |
556 | ||
a3c158d4 | 557 | static void emit_line(struct diff_options *o, const char *set, const char *reset, |
250f7993 JH |
558 | const char *line, int len) |
559 | { | |
a3c158d4 | 560 | emit_line_0(o, set, reset, line[0], line+1, len-1); |
250f7993 JH |
561 | } |
562 | ||
36a4cefd | 563 | enum diff_symbol { |
ff958679 SB |
564 | DIFF_SYMBOL_WORDS_PORCELAIN, |
565 | DIFF_SYMBOL_WORDS, | |
091f8e28 | 566 | DIFF_SYMBOL_CONTEXT, |
f2bb1218 | 567 | DIFF_SYMBOL_CONTEXT_INCOMPLETE, |
091f8e28 SB |
568 | DIFF_SYMBOL_PLUS, |
569 | DIFF_SYMBOL_MINUS, | |
b9cbfde6 | 570 | DIFF_SYMBOL_NO_LF_EOF, |
68abc6f1 | 571 | DIFF_SYMBOL_CONTEXT_FRAGINFO, |
c64b420b | 572 | DIFF_SYMBOL_CONTEXT_MARKER, |
36a4cefd SB |
573 | DIFF_SYMBOL_SEPARATOR |
574 | }; | |
091f8e28 SB |
575 | /* |
576 | * Flags for content lines: | |
577 | * 0..12 are whitespace rules | |
578 | * 13-15 are WSEH_NEW | WSEH_OLD | WSEH_CONTEXT | |
579 | * 16 is marking if the line is blank at EOF | |
580 | */ | |
581 | #define DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF (1<<16) | |
582 | #define DIFF_SYMBOL_CONTENT_WS_MASK (WSEH_NEW | WSEH_OLD | WSEH_CONTEXT | WS_RULE_MASK) | |
583 | ||
584 | static void emit_line_ws_markup(struct diff_options *o, | |
585 | const char *set, const char *reset, | |
586 | const char *line, int len, char sign, | |
587 | unsigned ws_rule, int blank_at_eof) | |
588 | { | |
589 | const char *ws = NULL; | |
590 | ||
591 | if (o->ws_error_highlight & ws_rule) { | |
592 | ws = diff_get_color_opt(o, DIFF_WHITESPACE); | |
593 | if (!*ws) | |
594 | ws = NULL; | |
595 | } | |
596 | ||
597 | if (!ws) | |
598 | emit_line_0(o, set, reset, sign, line, len); | |
599 | else if (blank_at_eof) | |
600 | /* Blank line at EOF - paint '+' as well */ | |
601 | emit_line_0(o, ws, reset, sign, line, len); | |
602 | else { | |
603 | /* Emit just the prefix, then the rest. */ | |
604 | emit_line_0(o, set, reset, sign, "", 0); | |
605 | ws_check_emit(line, len, ws_rule, | |
606 | o->file, set, reset, ws); | |
607 | } | |
608 | } | |
36a4cefd SB |
609 | |
610 | static void emit_diff_symbol(struct diff_options *o, enum diff_symbol s, | |
091f8e28 | 611 | const char *line, int len, unsigned flags) |
36a4cefd | 612 | { |
b9cbfde6 | 613 | static const char *nneof = " No newline at end of file\n"; |
091f8e28 | 614 | const char *context, *reset, *set; |
36a4cefd | 615 | switch (s) { |
b9cbfde6 SB |
616 | case DIFF_SYMBOL_NO_LF_EOF: |
617 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
618 | reset = diff_get_color_opt(o, DIFF_RESET); | |
619 | putc('\n', o->file); | |
620 | emit_line_0(o, context, reset, '\\', | |
621 | nneof, strlen(nneof)); | |
622 | break; | |
68abc6f1 SB |
623 | case DIFF_SYMBOL_CONTEXT_FRAGINFO: |
624 | emit_line(o, "", "", line, len); | |
625 | break; | |
f2bb1218 | 626 | case DIFF_SYMBOL_CONTEXT_INCOMPLETE: |
c64b420b SB |
627 | case DIFF_SYMBOL_CONTEXT_MARKER: |
628 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
629 | reset = diff_get_color_opt(o, DIFF_RESET); | |
630 | emit_line(o, context, reset, line, len); | |
631 | break; | |
36a4cefd SB |
632 | case DIFF_SYMBOL_SEPARATOR: |
633 | fprintf(o->file, "%s%c", | |
634 | diff_line_prefix(o), | |
635 | o->line_termination); | |
636 | break; | |
091f8e28 SB |
637 | case DIFF_SYMBOL_CONTEXT: |
638 | set = diff_get_color_opt(o, DIFF_CONTEXT); | |
639 | reset = diff_get_color_opt(o, DIFF_RESET); | |
640 | emit_line_ws_markup(o, set, reset, line, len, ' ', | |
641 | flags & (DIFF_SYMBOL_CONTENT_WS_MASK), 0); | |
642 | break; | |
643 | case DIFF_SYMBOL_PLUS: | |
644 | set = diff_get_color_opt(o, DIFF_FILE_NEW); | |
645 | reset = diff_get_color_opt(o, DIFF_RESET); | |
646 | emit_line_ws_markup(o, set, reset, line, len, '+', | |
647 | flags & DIFF_SYMBOL_CONTENT_WS_MASK, | |
648 | flags & DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF); | |
649 | break; | |
650 | case DIFF_SYMBOL_MINUS: | |
651 | set = diff_get_color_opt(o, DIFF_FILE_OLD); | |
652 | reset = diff_get_color_opt(o, DIFF_RESET); | |
653 | emit_line_ws_markup(o, set, reset, line, len, '-', | |
654 | flags & DIFF_SYMBOL_CONTENT_WS_MASK, 0); | |
655 | break; | |
ff958679 SB |
656 | case DIFF_SYMBOL_WORDS_PORCELAIN: |
657 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
658 | reset = diff_get_color_opt(o, DIFF_RESET); | |
659 | emit_line(o, context, reset, line, len); | |
660 | fputs("~\n", o->file); | |
661 | break; | |
662 | case DIFF_SYMBOL_WORDS: | |
663 | context = diff_get_color_opt(o, DIFF_CONTEXT); | |
664 | reset = diff_get_color_opt(o, DIFF_RESET); | |
665 | /* | |
666 | * Skip the prefix character, if any. With | |
667 | * diff_suppress_blank_empty, there may be | |
668 | * none. | |
669 | */ | |
670 | if (line[0] != '\n') { | |
671 | line++; | |
672 | len--; | |
673 | } | |
674 | emit_line(o, context, reset, line, len); | |
675 | break; | |
36a4cefd SB |
676 | default: |
677 | die("BUG: unknown diff symbol"); | |
678 | } | |
679 | } | |
680 | ||
6957eb9a JH |
681 | static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line, int len) |
682 | { | |
683 | if (!((ecbdata->ws_rule & WS_BLANK_AT_EOF) && | |
684 | ecbdata->blank_at_eof_in_preimage && | |
685 | ecbdata->blank_at_eof_in_postimage && | |
686 | ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage && | |
687 | ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage)) | |
688 | return 0; | |
018cff70 | 689 | return ws_blank_line(line, len, ecbdata->ws_rule); |
6957eb9a JH |
690 | } |
691 | ||
b8767f79 | 692 | static void emit_add_line(const char *reset, |
0e383e18 JH |
693 | struct emit_callback *ecbdata, |
694 | const char *line, int len) | |
695 | { | |
091f8e28 SB |
696 | unsigned flags = WSEH_NEW | ecbdata->ws_rule; |
697 | if (new_blank_line_at_eof(ecbdata, line, len)) | |
698 | flags |= DIFF_SYMBOL_CONTENT_BLANK_LINE_EOF; | |
699 | ||
700 | emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_PLUS, line, len, flags); | |
b8767f79 | 701 | } |
0e383e18 | 702 | |
b8767f79 JH |
703 | static void emit_del_line(const char *reset, |
704 | struct emit_callback *ecbdata, | |
705 | const char *line, int len) | |
706 | { | |
091f8e28 SB |
707 | unsigned flags = WSEH_OLD | ecbdata->ws_rule; |
708 | emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_MINUS, line, len, flags); | |
0e383e18 JH |
709 | } |
710 | ||
711 | static void emit_context_line(const char *reset, | |
712 | struct emit_callback *ecbdata, | |
713 | const char *line, int len) | |
714 | { | |
091f8e28 SB |
715 | unsigned flags = WSEH_CONTEXT | ecbdata->ws_rule; |
716 | emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_CONTEXT, line, len, flags); | |
0e383e18 JH |
717 | } |
718 | ||
89cb73a1 BW |
719 | static void emit_hunk_header(struct emit_callback *ecbdata, |
720 | const char *line, int len) | |
721 | { | |
8dbf3eb6 | 722 | const char *context = diff_get_color(ecbdata->color_diff, DIFF_CONTEXT); |
89cb73a1 BW |
723 | const char *frag = diff_get_color(ecbdata->color_diff, DIFF_FRAGINFO); |
724 | const char *func = diff_get_color(ecbdata->color_diff, DIFF_FUNCINFO); | |
725 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); | |
726 | static const char atat[2] = { '@', '@' }; | |
727 | const char *cp, *ep; | |
2efcc977 BY |
728 | struct strbuf msgbuf = STRBUF_INIT; |
729 | int org_len = len; | |
730 | int i = 1; | |
89cb73a1 BW |
731 | |
732 | /* | |
733 | * As a hunk header must begin with "@@ -<old>, +<new> @@", | |
734 | * it always is at least 10 bytes long. | |
735 | */ | |
736 | if (len < 10 || | |
737 | memcmp(line, atat, 2) || | |
738 | !(ep = memmem(line + 2, len - 2, atat, 2))) { | |
c64b420b | 739 | emit_diff_symbol(ecbdata->opt, |
091f8e28 | 740 | DIFF_SYMBOL_CONTEXT_MARKER, line, len, 0); |
89cb73a1 BW |
741 | return; |
742 | } | |
743 | ep += 2; /* skip over @@ */ | |
744 | ||
745 | /* The hunk header in fraginfo color */ | |
cedc61a9 | 746 | strbuf_addstr(&msgbuf, frag); |
2efcc977 | 747 | strbuf_add(&msgbuf, line, ep - line); |
cedc61a9 | 748 | strbuf_addstr(&msgbuf, reset); |
2efcc977 BY |
749 | |
750 | /* | |
751 | * trailing "\r\n" | |
752 | */ | |
753 | for ( ; i < 3; i++) | |
754 | if (line[len - i] == '\r' || line[len - i] == '\n') | |
755 | len--; | |
89cb73a1 BW |
756 | |
757 | /* blank before the func header */ | |
758 | for (cp = ep; ep - line < len; ep++) | |
759 | if (*ep != ' ' && *ep != '\t') | |
760 | break; | |
2efcc977 | 761 | if (ep != cp) { |
8dbf3eb6 | 762 | strbuf_addstr(&msgbuf, context); |
2efcc977 | 763 | strbuf_add(&msgbuf, cp, ep - cp); |
cedc61a9 | 764 | strbuf_addstr(&msgbuf, reset); |
2efcc977 BY |
765 | } |
766 | ||
767 | if (ep < line + len) { | |
cedc61a9 | 768 | strbuf_addstr(&msgbuf, func); |
2efcc977 | 769 | strbuf_add(&msgbuf, ep, line + len - ep); |
cedc61a9 | 770 | strbuf_addstr(&msgbuf, reset); |
2efcc977 | 771 | } |
89cb73a1 | 772 | |
2efcc977 | 773 | strbuf_add(&msgbuf, line + len, org_len - len); |
dfb7728f | 774 | strbuf_complete_line(&msgbuf); |
68abc6f1 | 775 | emit_diff_symbol(ecbdata->opt, |
091f8e28 | 776 | DIFF_SYMBOL_CONTEXT_FRAGINFO, msgbuf.buf, msgbuf.len, 0); |
2efcc977 | 777 | strbuf_release(&msgbuf); |
89cb73a1 BW |
778 | } |
779 | ||
479b0ae8 JK |
780 | static struct diff_tempfile *claim_diff_tempfile(void) { |
781 | int i; | |
782 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) | |
783 | if (!diff_temp[i].name) | |
784 | return diff_temp + i; | |
785 | die("BUG: diff is failing to clean up its tempfiles"); | |
786 | } | |
787 | ||
479b0ae8 JK |
788 | static void remove_tempfile(void) |
789 | { | |
790 | int i; | |
a8344abe | 791 | for (i = 0; i < ARRAY_SIZE(diff_temp); i++) { |
284098f1 MH |
792 | if (is_tempfile_active(&diff_temp[i].tempfile)) |
793 | delete_tempfile(&diff_temp[i].tempfile); | |
a8344abe NR |
794 | diff_temp[i].name = NULL; |
795 | } | |
479b0ae8 JK |
796 | } |
797 | ||
c0c77734 | 798 | static void print_line_count(FILE *file, int count) |
6973dcae JH |
799 | { |
800 | switch (count) { | |
801 | case 0: | |
c0c77734 | 802 | fprintf(file, "0,0"); |
6973dcae JH |
803 | break; |
804 | case 1: | |
c0c77734 | 805 | fprintf(file, "1"); |
6973dcae JH |
806 | break; |
807 | default: | |
c0c77734 | 808 | fprintf(file, "1,%d", count); |
6973dcae JH |
809 | break; |
810 | } | |
811 | } | |
812 | ||
7f7ee2ff JH |
813 | static void emit_rewrite_lines(struct emit_callback *ecb, |
814 | int prefix, const char *data, int size) | |
6973dcae | 815 | { |
7f7ee2ff | 816 | const char *endp = NULL; |
7f7ee2ff JH |
817 | const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET); |
818 | ||
819 | while (0 < size) { | |
820 | int len; | |
821 | ||
822 | endp = memchr(data, '\n', size); | |
823 | len = endp ? (endp - data + 1) : size; | |
824 | if (prefix != '+') { | |
825 | ecb->lno_in_preimage++; | |
0e383e18 | 826 | emit_del_line(reset, ecb, data, len); |
7f7ee2ff JH |
827 | } else { |
828 | ecb->lno_in_postimage++; | |
829 | emit_add_line(reset, ecb, data, len); | |
13e36ec5 | 830 | } |
7f7ee2ff JH |
831 | size -= len; |
832 | data += len; | |
833 | } | |
b9cbfde6 | 834 | if (!endp) |
091f8e28 | 835 | emit_diff_symbol(ecb->opt, DIFF_SYMBOL_NO_LF_EOF, NULL, 0, 0); |
6973dcae JH |
836 | } |
837 | ||
838 | static void emit_rewrite_diff(const char *name_a, | |
839 | const char *name_b, | |
840 | struct diff_filespec *one, | |
13e36ec5 | 841 | struct diff_filespec *two, |
d9bae1a1 JK |
842 | struct userdiff_driver *textconv_one, |
843 | struct userdiff_driver *textconv_two, | |
eab9a40b | 844 | struct diff_options *o) |
6973dcae JH |
845 | { |
846 | int lc_a, lc_b; | |
1a9eb3b9 | 847 | const char *name_a_tab, *name_b_tab; |
f1c96261 JK |
848 | const char *metainfo = diff_get_color(o->use_color, DIFF_METAINFO); |
849 | const char *fraginfo = diff_get_color(o->use_color, DIFF_FRAGINFO); | |
850 | const char *reset = diff_get_color(o->use_color, DIFF_RESET); | |
d5625091 | 851 | static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT; |
a5a818ee | 852 | const char *a_prefix, *b_prefix; |
840383b2 | 853 | char *data_one, *data_two; |
3aa1f7ca | 854 | size_t size_one, size_two; |
7f7ee2ff | 855 | struct emit_callback ecbdata; |
30997bb8 | 856 | const char *line_prefix = diff_line_prefix(o); |
a5a818ee JH |
857 | |
858 | if (diff_mnemonic_prefix && DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
859 | a_prefix = o->b_prefix; | |
860 | b_prefix = o->a_prefix; | |
861 | } else { | |
862 | a_prefix = o->a_prefix; | |
863 | b_prefix = o->b_prefix; | |
864 | } | |
1a9eb3b9 | 865 | |
8a13becc JH |
866 | name_a += (*name_a == '/'); |
867 | name_b += (*name_b == '/'); | |
1a9eb3b9 JH |
868 | name_a_tab = strchr(name_a, ' ') ? "\t" : ""; |
869 | name_b_tab = strchr(name_b, ' ') ? "\t" : ""; | |
870 | ||
d5625091 JH |
871 | strbuf_reset(&a_name); |
872 | strbuf_reset(&b_name); | |
a5a818ee JH |
873 | quote_two_c_style(&a_name, a_prefix, name_a, 0); |
874 | quote_two_c_style(&b_name, b_prefix, name_b, 0); | |
d5625091 | 875 | |
840383b2 JK |
876 | size_one = fill_textconv(textconv_one, one, &data_one); |
877 | size_two = fill_textconv(textconv_two, two, &data_two); | |
3aa1f7ca | 878 | |
d91ba8fa | 879 | memset(&ecbdata, 0, sizeof(ecbdata)); |
daa0c3d9 | 880 | ecbdata.color_diff = want_color(o->use_color); |
c189c4f2 | 881 | ecbdata.ws_rule = whitespace_rule(name_b); |
a3c158d4 | 882 | ecbdata.opt = o; |
d91ba8fa JH |
883 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) { |
884 | mmfile_t mf1, mf2; | |
885 | mf1.ptr = (char *)data_one; | |
886 | mf2.ptr = (char *)data_two; | |
887 | mf1.size = size_one; | |
888 | mf2.size = size_two; | |
889 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
890 | } | |
891 | ecbdata.lno_in_preimage = 1; | |
892 | ecbdata.lno_in_postimage = 1; | |
893 | ||
3aa1f7ca JK |
894 | lc_a = count_lines(data_one, size_one); |
895 | lc_b = count_lines(data_two, size_two); | |
c0c77734 | 896 | fprintf(o->file, |
7be57610 BY |
897 | "%s%s--- %s%s%s\n%s%s+++ %s%s%s\n%s%s@@ -", |
898 | line_prefix, metainfo, a_name.buf, name_a_tab, reset, | |
899 | line_prefix, metainfo, b_name.buf, name_b_tab, reset, | |
900 | line_prefix, fraginfo); | |
467ddc14 JH |
901 | if (!o->irreversible_delete) |
902 | print_line_count(o->file, lc_a); | |
903 | else | |
904 | fprintf(o->file, "?,?"); | |
c0c77734 DB |
905 | fprintf(o->file, " +"); |
906 | print_line_count(o->file, lc_b); | |
907 | fprintf(o->file, " @@%s\n", reset); | |
467ddc14 | 908 | if (lc_a && !o->irreversible_delete) |
d91ba8fa | 909 | emit_rewrite_lines(&ecbdata, '-', data_one, size_one); |
6973dcae | 910 | if (lc_b) |
d91ba8fa | 911 | emit_rewrite_lines(&ecbdata, '+', data_two, size_two); |
b76c056b | 912 | if (textconv_one) |
aed6ca52 | 913 | free((char *)data_one); |
b76c056b | 914 | if (textconv_two) |
aed6ca52 | 915 | free((char *)data_two); |
6973dcae JH |
916 | } |
917 | ||
f59a59e2 JS |
918 | struct diff_words_buffer { |
919 | mmfile_t text; | |
920 | long alloc; | |
2e5d2003 JS |
921 | struct diff_words_orig { |
922 | const char *begin, *end; | |
923 | } *orig; | |
924 | int orig_nr, orig_alloc; | |
f59a59e2 JS |
925 | }; |
926 | ||
927 | static void diff_words_append(char *line, unsigned long len, | |
928 | struct diff_words_buffer *buffer) | |
929 | { | |
23c1575f | 930 | ALLOC_GROW(buffer->text.ptr, buffer->text.size + len, buffer->alloc); |
f59a59e2 JS |
931 | line++; |
932 | len--; | |
933 | memcpy(buffer->text.ptr + buffer->text.size, line, len); | |
934 | buffer->text.size += len; | |
2b6a5417 | 935 | buffer->text.ptr[buffer->text.size] = '\0'; |
f59a59e2 JS |
936 | } |
937 | ||
9cba13ca | 938 | struct diff_words_style_elem { |
882749a0 TR |
939 | const char *prefix; |
940 | const char *suffix; | |
941 | const char *color; /* NULL; filled in by the setup code if | |
942 | * color is enabled */ | |
943 | }; | |
944 | ||
9cba13ca | 945 | struct diff_words_style { |
882749a0 TR |
946 | enum diff_words_type type; |
947 | struct diff_words_style_elem new, old, ctx; | |
948 | const char *newline; | |
949 | }; | |
950 | ||
c2e86add | 951 | static struct diff_words_style diff_words_styles[] = { |
882749a0 TR |
952 | { DIFF_WORDS_PORCELAIN, {"+", "\n"}, {"-", "\n"}, {" ", "\n"}, "~\n" }, |
953 | { DIFF_WORDS_PLAIN, {"{+", "+}"}, {"[-", "-]"}, {"", ""}, "\n" }, | |
954 | { DIFF_WORDS_COLOR, {"", ""}, {"", ""}, {"", ""}, "\n" } | |
955 | }; | |
956 | ||
f59a59e2 | 957 | struct diff_words_data { |
f59a59e2 | 958 | struct diff_words_buffer minus, plus; |
2e5d2003 | 959 | const char *current_plus; |
4297c0ae BY |
960 | int last_minus; |
961 | struct diff_options *opt; | |
2b6a5417 | 962 | regex_t *word_regex; |
882749a0 TR |
963 | enum diff_words_type type; |
964 | struct diff_words_style *style; | |
f59a59e2 JS |
965 | }; |
966 | ||
882749a0 TR |
967 | static int fn_out_diff_words_write_helper(FILE *fp, |
968 | struct diff_words_style_elem *st_el, | |
969 | const char *newline, | |
4297c0ae BY |
970 | size_t count, const char *buf, |
971 | const char *line_prefix) | |
882749a0 | 972 | { |
4297c0ae BY |
973 | int print = 0; |
974 | ||
882749a0 TR |
975 | while (count) { |
976 | char *p = memchr(buf, '\n', count); | |
4297c0ae BY |
977 | if (print) |
978 | fputs(line_prefix, fp); | |
882749a0 TR |
979 | if (p != buf) { |
980 | if (st_el->color && fputs(st_el->color, fp) < 0) | |
981 | return -1; | |
982 | if (fputs(st_el->prefix, fp) < 0 || | |
983 | fwrite(buf, p ? p - buf : count, 1, fp) != 1 || | |
984 | fputs(st_el->suffix, fp) < 0) | |
985 | return -1; | |
986 | if (st_el->color && *st_el->color | |
987 | && fputs(GIT_COLOR_RESET, fp) < 0) | |
988 | return -1; | |
989 | } | |
990 | if (!p) | |
991 | return 0; | |
992 | if (fputs(newline, fp) < 0) | |
993 | return -1; | |
994 | count -= p + 1 - buf; | |
995 | buf = p + 1; | |
4297c0ae | 996 | print = 1; |
882749a0 TR |
997 | } |
998 | return 0; | |
999 | } | |
1000 | ||
4297c0ae BY |
1001 | /* |
1002 | * '--color-words' algorithm can be described as: | |
1003 | * | |
5621760f | 1004 | * 1. collect the minus/plus lines of a diff hunk, divided into |
4297c0ae BY |
1005 | * minus-lines and plus-lines; |
1006 | * | |
1007 | * 2. break both minus-lines and plus-lines into words and | |
1008 | * place them into two mmfile_t with one word for each line; | |
1009 | * | |
1010 | * 3. use xdiff to run diff on the two mmfile_t to get the words level diff; | |
1011 | * | |
1012 | * And for the common parts of the both file, we output the plus side text. | |
1013 | * diff_words->current_plus is used to trace the current position of the plus file | |
1014 | * which printed. diff_words->last_minus is used to trace the last minus word | |
1015 | * printed. | |
1016 | * | |
1017 | * For '--graph' to work with '--color-words', we need to output the graph prefix | |
1018 | * on each line of color words output. Generally, there are two conditions on | |
1019 | * which we should output the prefix. | |
1020 | * | |
1021 | * 1. diff_words->last_minus == 0 && | |
1022 | * diff_words->current_plus == diff_words->plus.text.ptr | |
1023 | * | |
1024 | * that is: the plus text must start as a new line, and if there is no minus | |
1025 | * word printed, a graph prefix must be printed. | |
1026 | * | |
1027 | * 2. diff_words->current_plus > diff_words->plus.text.ptr && | |
1028 | * *(diff_words->current_plus - 1) == '\n' | |
1029 | * | |
1030 | * that is: a graph prefix must be printed following a '\n' | |
1031 | */ | |
1032 | static int color_words_output_graph_prefix(struct diff_words_data *diff_words) | |
1033 | { | |
1034 | if ((diff_words->last_minus == 0 && | |
1035 | diff_words->current_plus == diff_words->plus.text.ptr) || | |
1036 | (diff_words->current_plus > diff_words->plus.text.ptr && | |
1037 | *(diff_words->current_plus - 1) == '\n')) { | |
1038 | return 1; | |
1039 | } else { | |
1040 | return 0; | |
1041 | } | |
1042 | } | |
1043 | ||
f59a59e2 | 1044 | static void fn_out_diff_words_aux(void *priv, char *line, unsigned long len) |
f59a59e2 | 1045 | { |
f59a59e2 | 1046 | struct diff_words_data *diff_words = priv; |
882749a0 | 1047 | struct diff_words_style *style = diff_words->style; |
2e5d2003 JS |
1048 | int minus_first, minus_len, plus_first, plus_len; |
1049 | const char *minus_begin, *minus_end, *plus_begin, *plus_end; | |
4297c0ae | 1050 | struct diff_options *opt = diff_words->opt; |
30997bb8 | 1051 | const char *line_prefix; |
f59a59e2 | 1052 | |
2e5d2003 JS |
1053 | if (line[0] != '@' || parse_hunk_header(line, len, |
1054 | &minus_first, &minus_len, &plus_first, &plus_len)) | |
f59a59e2 JS |
1055 | return; |
1056 | ||
4297c0ae | 1057 | assert(opt); |
30997bb8 | 1058 | line_prefix = diff_line_prefix(opt); |
4297c0ae | 1059 | |
2e5d2003 JS |
1060 | /* POSIX requires that first be decremented by one if len == 0... */ |
1061 | if (minus_len) { | |
1062 | minus_begin = diff_words->minus.orig[minus_first].begin; | |
1063 | minus_end = | |
1064 | diff_words->minus.orig[minus_first + minus_len - 1].end; | |
1065 | } else | |
1066 | minus_begin = minus_end = | |
1067 | diff_words->minus.orig[minus_first].end; | |
1068 | ||
1069 | if (plus_len) { | |
1070 | plus_begin = diff_words->plus.orig[plus_first].begin; | |
1071 | plus_end = diff_words->plus.orig[plus_first + plus_len - 1].end; | |
1072 | } else | |
1073 | plus_begin = plus_end = diff_words->plus.orig[plus_first].end; | |
1074 | ||
4297c0ae BY |
1075 | if (color_words_output_graph_prefix(diff_words)) { |
1076 | fputs(line_prefix, diff_words->opt->file); | |
1077 | } | |
1078 | if (diff_words->current_plus != plus_begin) { | |
1079 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 TR |
1080 | &style->ctx, style->newline, |
1081 | plus_begin - diff_words->current_plus, | |
4297c0ae BY |
1082 | diff_words->current_plus, line_prefix); |
1083 | if (*(plus_begin - 1) == '\n') | |
1084 | fputs(line_prefix, diff_words->opt->file); | |
1085 | } | |
1086 | if (minus_begin != minus_end) { | |
1087 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 1088 | &style->old, style->newline, |
4297c0ae BY |
1089 | minus_end - minus_begin, minus_begin, |
1090 | line_prefix); | |
1091 | } | |
1092 | if (plus_begin != plus_end) { | |
1093 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 1094 | &style->new, style->newline, |
4297c0ae BY |
1095 | plus_end - plus_begin, plus_begin, |
1096 | line_prefix); | |
1097 | } | |
2e5d2003 JS |
1098 | |
1099 | diff_words->current_plus = plus_end; | |
4297c0ae | 1100 | diff_words->last_minus = minus_first; |
f59a59e2 JS |
1101 | } |
1102 | ||
2b6a5417 JS |
1103 | /* This function starts looking at *begin, and returns 0 iff a word was found. */ |
1104 | static int find_word_boundaries(mmfile_t *buffer, regex_t *word_regex, | |
1105 | int *begin, int *end) | |
1106 | { | |
1107 | if (word_regex && *begin < buffer->size) { | |
1108 | regmatch_t match[1]; | |
b7d36ffc JS |
1109 | if (!regexec_buf(word_regex, buffer->ptr + *begin, |
1110 | buffer->size - *begin, 1, match, 0)) { | |
2b6a5417 JS |
1111 | char *p = memchr(buffer->ptr + *begin + match[0].rm_so, |
1112 | '\n', match[0].rm_eo - match[0].rm_so); | |
1113 | *end = p ? p - buffer->ptr : match[0].rm_eo + *begin; | |
1114 | *begin += match[0].rm_so; | |
1115 | return *begin >= *end; | |
1116 | } | |
1117 | return -1; | |
f59a59e2 JS |
1118 | } |
1119 | ||
2b6a5417 JS |
1120 | /* find the next word */ |
1121 | while (*begin < buffer->size && isspace(buffer->ptr[*begin])) | |
1122 | (*begin)++; | |
1123 | if (*begin >= buffer->size) | |
1124 | return -1; | |
f59a59e2 | 1125 | |
2b6a5417 JS |
1126 | /* find the end of the word */ |
1127 | *end = *begin + 1; | |
1128 | while (*end < buffer->size && !isspace(buffer->ptr[*end])) | |
1129 | (*end)++; | |
1130 | ||
1131 | return 0; | |
f59a59e2 JS |
1132 | } |
1133 | ||
23c1575f | 1134 | /* |
2e5d2003 JS |
1135 | * This function splits the words in buffer->text, stores the list with |
1136 | * newline separator into out, and saves the offsets of the original words | |
1137 | * in buffer->orig. | |
23c1575f | 1138 | */ |
2b6a5417 JS |
1139 | static void diff_words_fill(struct diff_words_buffer *buffer, mmfile_t *out, |
1140 | regex_t *word_regex) | |
f59a59e2 | 1141 | { |
2e5d2003 | 1142 | int i, j; |
2b6a5417 | 1143 | long alloc = 0; |
f59a59e2 | 1144 | |
2e5d2003 | 1145 | out->size = 0; |
2b6a5417 | 1146 | out->ptr = NULL; |
f59a59e2 | 1147 | |
2e5d2003 JS |
1148 | /* fake an empty "0th" word */ |
1149 | ALLOC_GROW(buffer->orig, 1, buffer->orig_alloc); | |
1150 | buffer->orig[0].begin = buffer->orig[0].end = buffer->text.ptr; | |
1151 | buffer->orig_nr = 1; | |
1152 | ||
1153 | for (i = 0; i < buffer->text.size; i++) { | |
2b6a5417 JS |
1154 | if (find_word_boundaries(&buffer->text, word_regex, &i, &j)) |
1155 | return; | |
2e5d2003 JS |
1156 | |
1157 | /* store original boundaries */ | |
1158 | ALLOC_GROW(buffer->orig, buffer->orig_nr + 1, | |
1159 | buffer->orig_alloc); | |
1160 | buffer->orig[buffer->orig_nr].begin = buffer->text.ptr + i; | |
1161 | buffer->orig[buffer->orig_nr].end = buffer->text.ptr + j; | |
1162 | buffer->orig_nr++; | |
1163 | ||
1164 | /* store one word */ | |
2b6a5417 | 1165 | ALLOC_GROW(out->ptr, out->size + j - i + 1, alloc); |
2e5d2003 JS |
1166 | memcpy(out->ptr + out->size, buffer->text.ptr + i, j - i); |
1167 | out->ptr[out->size + j - i] = '\n'; | |
1168 | out->size += j - i + 1; | |
1169 | ||
1170 | i = j - 1; | |
f59a59e2 JS |
1171 | } |
1172 | } | |
1173 | ||
1174 | /* this executes the word diff on the accumulated buffers */ | |
1175 | static void diff_words_show(struct diff_words_data *diff_words) | |
1176 | { | |
1177 | xpparam_t xpp; | |
1178 | xdemitconf_t xecfg; | |
f59a59e2 | 1179 | mmfile_t minus, plus; |
882749a0 | 1180 | struct diff_words_style *style = diff_words->style; |
f59a59e2 | 1181 | |
4297c0ae | 1182 | struct diff_options *opt = diff_words->opt; |
30997bb8 | 1183 | const char *line_prefix; |
4297c0ae BY |
1184 | |
1185 | assert(opt); | |
30997bb8 | 1186 | line_prefix = diff_line_prefix(opt); |
4297c0ae | 1187 | |
2e5d2003 JS |
1188 | /* special case: only removal */ |
1189 | if (!diff_words->plus.text.size) { | |
4297c0ae BY |
1190 | fputs(line_prefix, diff_words->opt->file); |
1191 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 1192 | &style->old, style->newline, |
4297c0ae BY |
1193 | diff_words->minus.text.size, |
1194 | diff_words->minus.text.ptr, line_prefix); | |
2e5d2003 JS |
1195 | diff_words->minus.text.size = 0; |
1196 | return; | |
1197 | } | |
1198 | ||
1199 | diff_words->current_plus = diff_words->plus.text.ptr; | |
4297c0ae | 1200 | diff_words->last_minus = 0; |
f59a59e2 | 1201 | |
9ccd0a88 | 1202 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 1203 | memset(&xecfg, 0, sizeof(xecfg)); |
2b6a5417 JS |
1204 | diff_words_fill(&diff_words->minus, &minus, diff_words->word_regex); |
1205 | diff_words_fill(&diff_words->plus, &plus, diff_words->word_regex); | |
582aa00b | 1206 | xpp.flags = 0; |
2b6a5417 | 1207 | /* as only the hunk header will be parsed, we need a 0-context */ |
2e5d2003 | 1208 | xecfg.ctxlen = 0; |
3efb9880 JK |
1209 | if (xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words, |
1210 | &xpp, &xecfg)) | |
1211 | die("unable to generate word diff"); | |
f59a59e2 JS |
1212 | free(minus.ptr); |
1213 | free(plus.ptr); | |
2e5d2003 | 1214 | if (diff_words->current_plus != diff_words->plus.text.ptr + |
4297c0ae BY |
1215 | diff_words->plus.text.size) { |
1216 | if (color_words_output_graph_prefix(diff_words)) | |
1217 | fputs(line_prefix, diff_words->opt->file); | |
1218 | fn_out_diff_words_write_helper(diff_words->opt->file, | |
882749a0 | 1219 | &style->ctx, style->newline, |
2e5d2003 | 1220 | diff_words->plus.text.ptr + diff_words->plus.text.size |
4297c0ae BY |
1221 | - diff_words->current_plus, diff_words->current_plus, |
1222 | line_prefix); | |
1223 | } | |
f59a59e2 | 1224 | diff_words->minus.text.size = diff_words->plus.text.size = 0; |
f59a59e2 JS |
1225 | } |
1226 | ||
76fd2828 JH |
1227 | /* In "color-words" mode, show word-diff of words accumulated in the buffer */ |
1228 | static void diff_words_flush(struct emit_callback *ecbdata) | |
1229 | { | |
1230 | if (ecbdata->diff_words->minus.text.size || | |
1231 | ecbdata->diff_words->plus.text.size) | |
1232 | diff_words_show(ecbdata->diff_words); | |
1233 | } | |
1234 | ||
77d1a520 TR |
1235 | static void diff_filespec_load_driver(struct diff_filespec *one) |
1236 | { | |
1237 | /* Use already-loaded driver */ | |
1238 | if (one->driver) | |
1239 | return; | |
1240 | ||
1241 | if (S_ISREG(one->mode)) | |
1242 | one->driver = userdiff_find_by_path(one->path); | |
1243 | ||
1244 | /* Fallback to default settings */ | |
1245 | if (!one->driver) | |
1246 | one->driver = userdiff_find_by_name("default"); | |
1247 | } | |
1248 | ||
1249 | static const char *userdiff_word_regex(struct diff_filespec *one) | |
1250 | { | |
1251 | diff_filespec_load_driver(one); | |
1252 | return one->driver->word_regex; | |
1253 | } | |
1254 | ||
1255 | static void init_diff_words_data(struct emit_callback *ecbdata, | |
6440d341 | 1256 | struct diff_options *orig_opts, |
77d1a520 TR |
1257 | struct diff_filespec *one, |
1258 | struct diff_filespec *two) | |
1259 | { | |
1260 | int i; | |
6440d341 TR |
1261 | struct diff_options *o = xmalloc(sizeof(struct diff_options)); |
1262 | memcpy(o, orig_opts, sizeof(struct diff_options)); | |
77d1a520 TR |
1263 | |
1264 | ecbdata->diff_words = | |
1265 | xcalloc(1, sizeof(struct diff_words_data)); | |
1266 | ecbdata->diff_words->type = o->word_diff; | |
1267 | ecbdata->diff_words->opt = o; | |
1268 | if (!o->word_regex) | |
1269 | o->word_regex = userdiff_word_regex(one); | |
1270 | if (!o->word_regex) | |
1271 | o->word_regex = userdiff_word_regex(two); | |
1272 | if (!o->word_regex) | |
1273 | o->word_regex = diff_word_regex_cfg; | |
1274 | if (o->word_regex) { | |
1275 | ecbdata->diff_words->word_regex = (regex_t *) | |
1276 | xmalloc(sizeof(regex_t)); | |
1277 | if (regcomp(ecbdata->diff_words->word_regex, | |
1278 | o->word_regex, | |
1279 | REG_EXTENDED | REG_NEWLINE)) | |
1280 | die ("Invalid regular expression: %s", | |
1281 | o->word_regex); | |
1282 | } | |
1283 | for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) { | |
1284 | if (o->word_diff == diff_words_styles[i].type) { | |
1285 | ecbdata->diff_words->style = | |
1286 | &diff_words_styles[i]; | |
1287 | break; | |
1288 | } | |
1289 | } | |
1290 | if (want_color(o->use_color)) { | |
1291 | struct diff_words_style *st = ecbdata->diff_words->style; | |
1292 | st->old.color = diff_get_color_opt(o, DIFF_FILE_OLD); | |
1293 | st->new.color = diff_get_color_opt(o, DIFF_FILE_NEW); | |
8dbf3eb6 | 1294 | st->ctx.color = diff_get_color_opt(o, DIFF_CONTEXT); |
77d1a520 TR |
1295 | } |
1296 | } | |
1297 | ||
f59a59e2 JS |
1298 | static void free_diff_words_data(struct emit_callback *ecbdata) |
1299 | { | |
1300 | if (ecbdata->diff_words) { | |
76fd2828 | 1301 | diff_words_flush(ecbdata); |
6440d341 | 1302 | free (ecbdata->diff_words->opt); |
8e0f7003 | 1303 | free (ecbdata->diff_words->minus.text.ptr); |
2e5d2003 | 1304 | free (ecbdata->diff_words->minus.orig); |
8e0f7003 | 1305 | free (ecbdata->diff_words->plus.text.ptr); |
2e5d2003 | 1306 | free (ecbdata->diff_words->plus.orig); |
ef5644ea BC |
1307 | if (ecbdata->diff_words->word_regex) { |
1308 | regfree(ecbdata->diff_words->word_regex); | |
1309 | free(ecbdata->diff_words->word_regex); | |
1310 | } | |
6a83d902 | 1311 | FREE_AND_NULL(ecbdata->diff_words); |
f59a59e2 JS |
1312 | } |
1313 | } | |
1314 | ||
ce436973 | 1315 | const char *diff_get_color(int diff_use_color, enum color_diff ix) |
cd112cef | 1316 | { |
daa0c3d9 | 1317 | if (want_color(diff_use_color)) |
50f575fc LT |
1318 | return diff_colors[ix]; |
1319 | return ""; | |
cd112cef JS |
1320 | } |
1321 | ||
f1922234 JK |
1322 | const char *diff_line_prefix(struct diff_options *opt) |
1323 | { | |
1324 | struct strbuf *msgbuf; | |
1325 | if (!opt->output_prefix) | |
1326 | return ""; | |
1327 | ||
1328 | msgbuf = opt->output_prefix(opt, opt->output_prefix_data); | |
1329 | return msgbuf->buf; | |
1330 | } | |
1331 | ||
23707811 JH |
1332 | static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len) |
1333 | { | |
1334 | const char *cp; | |
1335 | unsigned long allot; | |
1336 | size_t l = len; | |
1337 | ||
1338 | if (ecb->truncate) | |
1339 | return ecb->truncate(line, len); | |
1340 | cp = line; | |
1341 | allot = l; | |
1342 | while (0 < l) { | |
1343 | (void) utf8_width(&cp, &l); | |
1344 | if (!cp) | |
1345 | break; /* truncated in the middle? */ | |
1346 | } | |
1347 | return allot - l; | |
1348 | } | |
1349 | ||
d68fe26f | 1350 | static void find_lno(const char *line, struct emit_callback *ecbdata) |
690ed843 | 1351 | { |
d68fe26f JH |
1352 | const char *p; |
1353 | ecbdata->lno_in_preimage = 0; | |
1354 | ecbdata->lno_in_postimage = 0; | |
1355 | p = strchr(line, '-'); | |
690ed843 | 1356 | if (!p) |
d68fe26f JH |
1357 | return; /* cannot happen */ |
1358 | ecbdata->lno_in_preimage = strtol(p + 1, NULL, 10); | |
1359 | p = strchr(p, '+'); | |
1360 | if (!p) | |
1361 | return; /* cannot happen */ | |
1362 | ecbdata->lno_in_postimage = strtol(p + 1, NULL, 10); | |
690ed843 JH |
1363 | } |
1364 | ||
cd112cef | 1365 | static void fn_out_consume(void *priv, char *line, unsigned long len) |
6973dcae | 1366 | { |
6973dcae | 1367 | struct emit_callback *ecbdata = priv; |
472ca780 | 1368 | const char *meta = diff_get_color(ecbdata->color_diff, DIFF_METAINFO); |
ce436973 | 1369 | const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET); |
7be57610 | 1370 | struct diff_options *o = ecbdata->opt; |
30997bb8 | 1371 | const char *line_prefix = diff_line_prefix(o); |
6973dcae | 1372 | |
ba16233c SB |
1373 | o->found_changes = 1; |
1374 | ||
3e97c7c6 | 1375 | if (ecbdata->header) { |
fb33b62c | 1376 | fprintf(o->file, "%s", ecbdata->header->buf); |
3e97c7c6 GB |
1377 | strbuf_reset(ecbdata->header); |
1378 | ecbdata->header = NULL; | |
1379 | } | |
34a5e1a2 | 1380 | |
6973dcae | 1381 | if (ecbdata->label_path[0]) { |
1a9eb3b9 JH |
1382 | const char *name_a_tab, *name_b_tab; |
1383 | ||
1384 | name_a_tab = strchr(ecbdata->label_path[0], ' ') ? "\t" : ""; | |
1385 | name_b_tab = strchr(ecbdata->label_path[1], ' ') ? "\t" : ""; | |
1386 | ||
fb33b62c | 1387 | fprintf(o->file, "%s%s--- %s%s%s\n", |
7be57610 | 1388 | line_prefix, meta, ecbdata->label_path[0], reset, name_a_tab); |
fb33b62c | 1389 | fprintf(o->file, "%s%s+++ %s%s%s\n", |
7be57610 | 1390 | line_prefix, meta, ecbdata->label_path[1], reset, name_b_tab); |
6973dcae JH |
1391 | ecbdata->label_path[0] = ecbdata->label_path[1] = NULL; |
1392 | } | |
cd112cef | 1393 | |
a624eaa7 JM |
1394 | if (diff_suppress_blank_empty |
1395 | && len == 2 && line[0] == ' ' && line[1] == '\n') { | |
1396 | line[0] = '\n'; | |
1397 | len = 1; | |
1398 | } | |
1399 | ||
b8d9c1a6 | 1400 | if (line[0] == '@') { |
76fd2828 JH |
1401 | if (ecbdata->diff_words) |
1402 | diff_words_flush(ecbdata); | |
23707811 | 1403 | len = sane_truncate_line(ecbdata, line, len); |
d68fe26f | 1404 | find_lno(line, ecbdata); |
89cb73a1 | 1405 | emit_hunk_header(ecbdata, line, len); |
448c3ef1 | 1406 | return; |
cd112cef | 1407 | } |
448c3ef1 | 1408 | |
448c3ef1 | 1409 | if (ecbdata->diff_words) { |
ff958679 SB |
1410 | enum diff_symbol s = |
1411 | ecbdata->diff_words->type == DIFF_WORDS_PORCELAIN ? | |
1412 | DIFF_SYMBOL_WORDS_PORCELAIN : DIFF_SYMBOL_WORDS; | |
448c3ef1 JH |
1413 | if (line[0] == '-') { |
1414 | diff_words_append(line, len, | |
1415 | &ecbdata->diff_words->minus); | |
1416 | return; | |
1417 | } else if (line[0] == '+') { | |
1418 | diff_words_append(line, len, | |
1419 | &ecbdata->diff_words->plus); | |
1420 | return; | |
59556548 | 1421 | } else if (starts_with(line, "\\ ")) { |
c7c2bc0a TR |
1422 | /* |
1423 | * Eat the "no newline at eof" marker as if we | |
1424 | * saw a "+" or "-" line with nothing on it, | |
1425 | * and return without diff_words_flush() to | |
1426 | * defer processing. If this is the end of | |
1427 | * preimage, more "+" lines may come after it. | |
1428 | */ | |
1429 | return; | |
448c3ef1 | 1430 | } |
76fd2828 | 1431 | diff_words_flush(ecbdata); |
ff958679 | 1432 | emit_diff_symbol(o, s, line, len, 0); |
448c3ef1 JH |
1433 | return; |
1434 | } | |
448c3ef1 | 1435 | |
0e383e18 JH |
1436 | switch (line[0]) { |
1437 | case '+': | |
d68fe26f | 1438 | ecbdata->lno_in_postimage++; |
018cff70 | 1439 | emit_add_line(reset, ecbdata, line + 1, len - 1); |
0e383e18 JH |
1440 | break; |
1441 | case '-': | |
1442 | ecbdata->lno_in_preimage++; | |
1443 | emit_del_line(reset, ecbdata, line + 1, len - 1); | |
1444 | break; | |
1445 | case ' ': | |
1446 | ecbdata->lno_in_postimage++; | |
1447 | ecbdata->lno_in_preimage++; | |
1448 | emit_context_line(reset, ecbdata, line + 1, len - 1); | |
1449 | break; | |
1450 | default: | |
1451 | /* incomplete line at the end */ | |
1452 | ecbdata->lno_in_preimage++; | |
f2bb1218 SB |
1453 | emit_diff_symbol(o, DIFF_SYMBOL_CONTEXT_INCOMPLETE, |
1454 | line, len, 0); | |
0e383e18 | 1455 | break; |
448c3ef1 | 1456 | } |
6973dcae JH |
1457 | } |
1458 | ||
1459 | static char *pprint_rename(const char *a, const char *b) | |
1460 | { | |
1461 | const char *old = a; | |
1462 | const char *new = b; | |
f285a2d7 | 1463 | struct strbuf name = STRBUF_INIT; |
6973dcae | 1464 | int pfx_length, sfx_length; |
dd281f09 | 1465 | int pfx_adjust_for_slash; |
6973dcae JH |
1466 | int len_a = strlen(a); |
1467 | int len_b = strlen(b); | |
663af342 | 1468 | int a_midlen, b_midlen; |
e5bfbf9b AJ |
1469 | int qlen_a = quote_c_style(a, NULL, NULL, 0); |
1470 | int qlen_b = quote_c_style(b, NULL, NULL, 0); | |
1471 | ||
1472 | if (qlen_a || qlen_b) { | |
663af342 PH |
1473 | quote_c_style(a, &name, NULL, 0); |
1474 | strbuf_addstr(&name, " => "); | |
1475 | quote_c_style(b, &name, NULL, 0); | |
b315c5c0 | 1476 | return strbuf_detach(&name, NULL); |
e5bfbf9b | 1477 | } |
6973dcae JH |
1478 | |
1479 | /* Find common prefix */ | |
1480 | pfx_length = 0; | |
1481 | while (*old && *new && *old == *new) { | |
1482 | if (*old == '/') | |
1483 | pfx_length = old - a + 1; | |
1484 | old++; | |
1485 | new++; | |
1486 | } | |
1487 | ||
1488 | /* Find common suffix */ | |
1489 | old = a + len_a; | |
1490 | new = b + len_b; | |
1491 | sfx_length = 0; | |
d020e27f | 1492 | /* |
dd281f09 TR |
1493 | * If there is a common prefix, it must end in a slash. In |
1494 | * that case we let this loop run 1 into the prefix to see the | |
1495 | * same slash. | |
1496 | * | |
1497 | * If there is no common prefix, we cannot do this as it would | |
1498 | * underrun the input strings. | |
d020e27f | 1499 | */ |
dd281f09 TR |
1500 | pfx_adjust_for_slash = (pfx_length ? 1 : 0); |
1501 | while (a + pfx_length - pfx_adjust_for_slash <= old && | |
1502 | b + pfx_length - pfx_adjust_for_slash <= new && | |
d020e27f | 1503 | *old == *new) { |
6973dcae JH |
1504 | if (*old == '/') |
1505 | sfx_length = len_a - (old - a); | |
1506 | old--; | |
1507 | new--; | |
1508 | } | |
1509 | ||
1510 | /* | |
1511 | * pfx{mid-a => mid-b}sfx | |
1512 | * {pfx-a => pfx-b}sfx | |
1513 | * pfx{sfx-a => sfx-b} | |
1514 | * name-a => name-b | |
1515 | */ | |
663af342 PH |
1516 | a_midlen = len_a - pfx_length - sfx_length; |
1517 | b_midlen = len_b - pfx_length - sfx_length; | |
1518 | if (a_midlen < 0) | |
1519 | a_midlen = 0; | |
1520 | if (b_midlen < 0) | |
1521 | b_midlen = 0; | |
1522 | ||
1523 | strbuf_grow(&name, pfx_length + a_midlen + b_midlen + sfx_length + 7); | |
6973dcae | 1524 | if (pfx_length + sfx_length) { |
663af342 PH |
1525 | strbuf_add(&name, a, pfx_length); |
1526 | strbuf_addch(&name, '{'); | |
6973dcae | 1527 | } |
663af342 PH |
1528 | strbuf_add(&name, a + pfx_length, a_midlen); |
1529 | strbuf_addstr(&name, " => "); | |
1530 | strbuf_add(&name, b + pfx_length, b_midlen); | |
1531 | if (pfx_length + sfx_length) { | |
1532 | strbuf_addch(&name, '}'); | |
1533 | strbuf_add(&name, a + len_a - sfx_length, sfx_length); | |
6973dcae | 1534 | } |
b315c5c0 | 1535 | return strbuf_detach(&name, NULL); |
6973dcae JH |
1536 | } |
1537 | ||
1538 | struct diffstat_t { | |
6973dcae JH |
1539 | int nr; |
1540 | int alloc; | |
1541 | struct diffstat_file { | |
f604652e | 1542 | char *from_name; |
6973dcae | 1543 | char *name; |
f604652e | 1544 | char *print_name; |
6973dcae JH |
1545 | unsigned is_unmerged:1; |
1546 | unsigned is_binary:1; | |
1547 | unsigned is_renamed:1; | |
74faaa16 | 1548 | unsigned is_interesting:1; |
0974c117 | 1549 | uintmax_t added, deleted; |
6973dcae JH |
1550 | } **files; |
1551 | }; | |
1552 | ||
1553 | static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat, | |
1554 | const char *name_a, | |
1555 | const char *name_b) | |
1556 | { | |
1557 | struct diffstat_file *x; | |
1a4927c5 | 1558 | x = xcalloc(1, sizeof(*x)); |
4c960a43 | 1559 | ALLOC_GROW(diffstat->files, diffstat->nr + 1, diffstat->alloc); |
6973dcae JH |
1560 | diffstat->files[diffstat->nr++] = x; |
1561 | if (name_b) { | |
f604652e JH |
1562 | x->from_name = xstrdup(name_a); |
1563 | x->name = xstrdup(name_b); | |
6973dcae JH |
1564 | x->is_renamed = 1; |
1565 | } | |
f604652e JH |
1566 | else { |
1567 | x->from_name = NULL; | |
9befac47 | 1568 | x->name = xstrdup(name_a); |
f604652e | 1569 | } |
6973dcae JH |
1570 | return x; |
1571 | } | |
1572 | ||
1573 | static void diffstat_consume(void *priv, char *line, unsigned long len) | |
1574 | { | |
1575 | struct diffstat_t *diffstat = priv; | |
1576 | struct diffstat_file *x = diffstat->files[diffstat->nr - 1]; | |
1577 | ||
1578 | if (line[0] == '+') | |
1579 | x->added++; | |
1580 | else if (line[0] == '-') | |
1581 | x->deleted++; | |
1582 | } | |
1583 | ||
698ce6f8 | 1584 | const char mime_boundary_leader[] = "------------"; |
6973dcae | 1585 | |
a2540023 JH |
1586 | static int scale_linear(int it, int width, int max_change) |
1587 | { | |
2eeeef24 JH |
1588 | if (!it) |
1589 | return 0; | |
a2540023 | 1590 | /* |
2eeeef24 JH |
1591 | * make sure that at least one '-' or '+' is printed if |
1592 | * there is any change to this path. The easiest way is to | |
1593 | * scale linearly as if the alloted width is one column shorter | |
1594 | * than it is, and then add 1 to the result. | |
a2540023 | 1595 | */ |
2eeeef24 | 1596 | return 1 + (it * (width - 1) / max_change); |
a2540023 JH |
1597 | } |
1598 | ||
c0c77734 | 1599 | static void show_name(FILE *file, |
a408e0e6 | 1600 | const char *prefix, const char *name, int len) |
a2540023 | 1601 | { |
a408e0e6 | 1602 | fprintf(file, " %s%-*s |", prefix, len, name); |
a2540023 JH |
1603 | } |
1604 | ||
c0c77734 | 1605 | static void show_graph(FILE *file, char ch, int cnt, const char *set, const char *reset) |
a2540023 JH |
1606 | { |
1607 | if (cnt <= 0) | |
1608 | return; | |
c0c77734 | 1609 | fprintf(file, "%s", set); |
a2540023 | 1610 | while (cnt--) |
c0c77734 DB |
1611 | putc(ch, file); |
1612 | fprintf(file, "%s", reset); | |
a2540023 JH |
1613 | } |
1614 | ||
f604652e JH |
1615 | static void fill_print_name(struct diffstat_file *file) |
1616 | { | |
1617 | char *pname; | |
1618 | ||
1619 | if (file->print_name) | |
1620 | return; | |
1621 | ||
1622 | if (!file->is_renamed) { | |
f285a2d7 | 1623 | struct strbuf buf = STRBUF_INIT; |
f604652e JH |
1624 | if (quote_c_style(file->name, &buf, NULL, 0)) { |
1625 | pname = strbuf_detach(&buf, NULL); | |
1626 | } else { | |
1627 | pname = file->name; | |
1628 | strbuf_release(&buf); | |
1629 | } | |
1630 | } else { | |
1631 | pname = pprint_rename(file->from_name, file->name); | |
1632 | } | |
1633 | file->print_name = pname; | |
1634 | } | |
1635 | ||
7f814632 NTND |
1636 | int print_stat_summary(FILE *fp, int files, int insertions, int deletions) |
1637 | { | |
1638 | struct strbuf sb = STRBUF_INIT; | |
1639 | int ret; | |
1640 | ||
1641 | if (!files) { | |
1642 | assert(insertions == 0 && deletions == 0); | |
218adaaa | 1643 | return fprintf(fp, "%s\n", " 0 files changed"); |
7f814632 NTND |
1644 | } |
1645 | ||
1646 | strbuf_addf(&sb, | |
218adaaa | 1647 | (files == 1) ? " %d file changed" : " %d files changed", |
7f814632 NTND |
1648 | files); |
1649 | ||
1650 | /* | |
1651 | * For binary diff, the caller may want to print "x files | |
1652 | * changed" with insertions == 0 && deletions == 0. | |
1653 | * | |
1654 | * Not omitting "0 insertions(+), 0 deletions(-)" in this case | |
1655 | * is probably less confusing (i.e skip over "2 files changed | |
1656 | * but nothing about added/removed lines? Is this a bug in Git?"). | |
1657 | */ | |
1658 | if (insertions || deletions == 0) { | |
7f814632 | 1659 | strbuf_addf(&sb, |
218adaaa | 1660 | (insertions == 1) ? ", %d insertion(+)" : ", %d insertions(+)", |
7f814632 NTND |
1661 | insertions); |
1662 | } | |
1663 | ||
1664 | if (deletions || insertions == 0) { | |
7f814632 | 1665 | strbuf_addf(&sb, |
218adaaa | 1666 | (deletions == 1) ? ", %d deletion(-)" : ", %d deletions(-)", |
7f814632 NTND |
1667 | deletions); |
1668 | } | |
1669 | strbuf_addch(&sb, '\n'); | |
1670 | ret = fputs(sb.buf, fp); | |
1671 | strbuf_release(&sb); | |
1672 | return ret; | |
1673 | } | |
1674 | ||
4b25d091 | 1675 | static void show_stats(struct diffstat_t *data, struct diff_options *options) |
6973dcae | 1676 | { |
eb3a9dd3 | 1677 | int i, len, add, del, adds = 0, dels = 0; |
0974c117 | 1678 | uintmax_t max_change = 0, max_len = 0; |
dc801e71 ZJS |
1679 | int total_files = data->nr, count; |
1680 | int width, name_width, graph_width, number_width = 0, bin_width = 0; | |
c0aa335c | 1681 | const char *reset, *add_c, *del_c; |
7be57610 | 1682 | const char *line_prefix = ""; |
e5f85df8 | 1683 | int extra_shown = 0; |
6973dcae JH |
1684 | |
1685 | if (data->nr == 0) | |
1686 | return; | |
1687 | ||
30997bb8 | 1688 | line_prefix = diff_line_prefix(options); |
808e1db2 | 1689 | count = options->stat_count ? options->stat_count : data->nr; |
a2540023 | 1690 | |
8f67f8ae | 1691 | reset = diff_get_color_opt(options, DIFF_RESET); |
8f67f8ae PH |
1692 | add_c = diff_get_color_opt(options, DIFF_FILE_NEW); |
1693 | del_c = diff_get_color_opt(options, DIFF_FILE_OLD); | |
785f7432 | 1694 | |
1b058bc3 ZJS |
1695 | /* |
1696 | * Find the longest filename and max number of changes | |
1697 | */ | |
808e1db2 | 1698 | for (i = 0; (i < count) && (i < data->nr); i++) { |
6973dcae | 1699 | struct diffstat_file *file = data->files[i]; |
0974c117 | 1700 | uintmax_t change = file->added + file->deleted; |
af0ed819 JH |
1701 | |
1702 | if (!file->is_interesting && (change == 0)) { | |
808e1db2 | 1703 | count++; /* not shown == room for one more */ |
358e460e MG |
1704 | continue; |
1705 | } | |
f604652e JH |
1706 | fill_print_name(file); |
1707 | len = strlen(file->print_name); | |
6973dcae JH |
1708 | if (max_len < len) |
1709 | max_len = len; | |
1710 | ||
dc801e71 ZJS |
1711 | if (file->is_unmerged) { |
1712 | /* "Unmerged" is 8 characters */ | |
1713 | bin_width = bin_width < 8 ? 8 : bin_width; | |
6973dcae | 1714 | continue; |
dc801e71 ZJS |
1715 | } |
1716 | if (file->is_binary) { | |
1717 | /* "Bin XXX -> YYY bytes" */ | |
1718 | int w = 14 + decimal_width(file->added) | |
1719 | + decimal_width(file->deleted); | |
1720 | bin_width = bin_width < w ? w : bin_width; | |
1721 | /* Display change counts aligned with "Bin" */ | |
1722 | number_width = 3; | |
1723 | continue; | |
1724 | } | |
1725 | ||
a2540023 JH |
1726 | if (max_change < change) |
1727 | max_change = change; | |
6973dcae | 1728 | } |
a20d3c0d | 1729 | count = i; /* where we can stop scanning in data->files[] */ |
6973dcae | 1730 | |
1b058bc3 ZJS |
1731 | /* |
1732 | * We have width = stat_width or term_columns() columns total. | |
1733 | * We want a maximum of min(max_len, stat_name_width) for the name part. | |
969fe57b | 1734 | * We want a maximum of min(max_change, stat_graph_width) for the +- part. |
1b058bc3 ZJS |
1735 | * We also need 1 for " " and 4 + decimal_width(max_change) |
1736 | * for " | NNNN " and one the empty column at the end, altogether | |
1737 | * 6 + decimal_width(max_change). | |
1738 | * | |
1739 | * If there's not enough space, we will use the smaller of | |
1740 | * stat_name_width (if set) and 5/8*width for the filename, | |
969fe57b ZJS |
1741 | * and the rest for constant elements + graph part, but no more |
1742 | * than stat_graph_width for the graph part. | |
1b058bc3 ZJS |
1743 | * (5/8 gives 50 for filename and 30 for the constant parts + graph |
1744 | * for the standard terminal size). | |
a2540023 | 1745 | * |
1b058bc3 ZJS |
1746 | * In other words: stat_width limits the maximum width, and |
1747 | * stat_name_width fixes the maximum width of the filename, | |
1748 | * and is also used to divide available columns if there | |
1749 | * aren't enough. | |
dc801e71 ZJS |
1750 | * |
1751 | * Binary files are displayed with "Bin XXX -> YYY bytes" | |
1752 | * instead of the change count and graph. This part is treated | |
1753 | * similarly to the graph part, except that it is not | |
41ccfdd9 | 1754 | * "scaled". If total width is too small to accommodate the |
dc801e71 ZJS |
1755 | * guaranteed minimum width of the filename part and the |
1756 | * separators and this message, this message will "overflow" | |
1757 | * making the line longer than the maximum width. | |
a2540023 | 1758 | */ |
1b058bc3 ZJS |
1759 | |
1760 | if (options->stat_width == -1) | |
cd48dadb | 1761 | width = term_columns() - strlen(line_prefix); |
a2540023 | 1762 | else |
1b058bc3 | 1763 | width = options->stat_width ? options->stat_width : 80; |
dc801e71 ZJS |
1764 | number_width = decimal_width(max_change) > number_width ? |
1765 | decimal_width(max_change) : number_width; | |
a2540023 | 1766 | |
df44483a ZJS |
1767 | if (options->stat_graph_width == -1) |
1768 | options->stat_graph_width = diff_stat_graph_width; | |
a2540023 | 1769 | |
1b058bc3 ZJS |
1770 | /* |
1771 | * Guarantee 3/8*16==6 for the graph part | |
1772 | * and 5/8*16==10 for the filename part | |
1773 | */ | |
1774 | if (width < 16 + 6 + number_width) | |
1775 | width = 16 + 6 + number_width; | |
1776 | ||
1777 | /* | |
1778 | * First assign sizes that are wanted, ignoring available width. | |
dc801e71 ZJS |
1779 | * strlen("Bin XXX -> YYY bytes") == bin_width, and the part |
1780 | * starting from "XXX" should fit in graph_width. | |
1b058bc3 | 1781 | */ |
dc801e71 ZJS |
1782 | graph_width = max_change + 4 > bin_width ? max_change : bin_width - 4; |
1783 | if (options->stat_graph_width && | |
1784 | options->stat_graph_width < graph_width) | |
1785 | graph_width = options->stat_graph_width; | |
1786 | ||
1b058bc3 ZJS |
1787 | name_width = (options->stat_name_width > 0 && |
1788 | options->stat_name_width < max_len) ? | |
1789 | options->stat_name_width : max_len; | |
1790 | ||
1791 | /* | |
1792 | * Adjust adjustable widths not to exceed maximum width | |
1793 | */ | |
1794 | if (name_width + number_width + 6 + graph_width > width) { | |
678c5741 | 1795 | if (graph_width > width * 3/8 - number_width - 6) { |
1b058bc3 | 1796 | graph_width = width * 3/8 - number_width - 6; |
678c5741 LP |
1797 | if (graph_width < 6) |
1798 | graph_width = 6; | |
1799 | } | |
1800 | ||
969fe57b ZJS |
1801 | if (options->stat_graph_width && |
1802 | graph_width > options->stat_graph_width) | |
1803 | graph_width = options->stat_graph_width; | |
1b058bc3 ZJS |
1804 | if (name_width > width - number_width - 6 - graph_width) |
1805 | name_width = width - number_width - 6 - graph_width; | |
1806 | else | |
1807 | graph_width = width - number_width - 6 - name_width; | |
1808 | } | |
1809 | ||
1810 | /* | |
1811 | * From here name_width is the width of the name area, | |
1812 | * and graph_width is the width of the graph area. | |
1813 | * max_change is used to scale graph properly. | |
1814 | */ | |
808e1db2 | 1815 | for (i = 0; i < count; i++) { |
d2543b8e | 1816 | const char *prefix = ""; |
af0ed819 JH |
1817 | struct diffstat_file *file = data->files[i]; |
1818 | char *name = file->print_name; | |
1819 | uintmax_t added = file->added; | |
1820 | uintmax_t deleted = file->deleted; | |
a2540023 | 1821 | int name_len; |
6973dcae | 1822 | |
a20d3c0d | 1823 | if (!file->is_interesting && (added + deleted == 0)) |
358e460e | 1824 | continue; |
a20d3c0d | 1825 | |
6973dcae JH |
1826 | /* |
1827 | * "scale" the filename | |
1828 | */ | |
a2540023 JH |
1829 | len = name_width; |
1830 | name_len = strlen(name); | |
1831 | if (name_width < name_len) { | |
6973dcae JH |
1832 | char *slash; |
1833 | prefix = "..."; | |
a2540023 JH |
1834 | len -= 3; |
1835 | name += name_len - len; | |
6973dcae JH |
1836 | slash = strchr(name, '/'); |
1837 | if (slash) | |
1838 | name = slash; | |
1839 | } | |
6973dcae | 1840 | |
af0ed819 | 1841 | if (file->is_binary) { |
7be57610 | 1842 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1843 | show_name(options->file, prefix, name, len); |
fc1320bf | 1844 | fprintf(options->file, " %*s", number_width, "Bin"); |
e18872b2 ZJS |
1845 | if (!added && !deleted) { |
1846 | putc('\n', options->file); | |
1847 | continue; | |
1848 | } | |
1849 | fprintf(options->file, " %s%"PRIuMAX"%s", | |
0974c117 | 1850 | del_c, deleted, reset); |
c0c77734 | 1851 | fprintf(options->file, " -> "); |
0974c117 JK |
1852 | fprintf(options->file, "%s%"PRIuMAX"%s", |
1853 | add_c, added, reset); | |
c0c77734 DB |
1854 | fprintf(options->file, " bytes"); |
1855 | fprintf(options->file, "\n"); | |
f604652e | 1856 | continue; |
6973dcae | 1857 | } |
af0ed819 | 1858 | else if (file->is_unmerged) { |
7be57610 | 1859 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1860 | show_name(options->file, prefix, name, len); |
dc801e71 | 1861 | fprintf(options->file, " Unmerged\n"); |
f604652e | 1862 | continue; |
6973dcae | 1863 | } |
6973dcae | 1864 | |
a2540023 JH |
1865 | /* |
1866 | * scale the add/delete | |
1867 | */ | |
6973dcae JH |
1868 | add = added; |
1869 | del = deleted; | |
6973dcae | 1870 | |
1b058bc3 | 1871 | if (graph_width <= max_change) { |
d3c9cf32 | 1872 | int total = scale_linear(add + del, graph_width, max_change); |
2eeeef24 JH |
1873 | if (total < 2 && add && del) |
1874 | /* width >= 2 due to the sanity check */ | |
1875 | total = 2; | |
1876 | if (add < del) { | |
1b058bc3 | 1877 | add = scale_linear(add, graph_width, max_change); |
2eeeef24 JH |
1878 | del = total - add; |
1879 | } else { | |
1b058bc3 | 1880 | del = scale_linear(del, graph_width, max_change); |
2eeeef24 JH |
1881 | add = total - del; |
1882 | } | |
6973dcae | 1883 | } |
7be57610 | 1884 | fprintf(options->file, "%s", line_prefix); |
a408e0e6 | 1885 | show_name(options->file, prefix, name, len); |
dc801e71 ZJS |
1886 | fprintf(options->file, " %*"PRIuMAX"%s", |
1887 | number_width, added + deleted, | |
1888 | added + deleted ? " " : ""); | |
c0c77734 DB |
1889 | show_graph(options->file, '+', add, add_c, reset); |
1890 | show_graph(options->file, '-', del, del_c, reset); | |
1891 | fprintf(options->file, "\n"); | |
1892 | } | |
a20d3c0d JH |
1893 | |
1894 | for (i = 0; i < data->nr; i++) { | |
af0ed819 JH |
1895 | struct diffstat_file *file = data->files[i]; |
1896 | uintmax_t added = file->added; | |
1897 | uintmax_t deleted = file->deleted; | |
82dfc2c4 JH |
1898 | |
1899 | if (file->is_unmerged || | |
1900 | (!file->is_interesting && (added + deleted == 0))) { | |
808e1db2 MG |
1901 | total_files--; |
1902 | continue; | |
1903 | } | |
a20d3c0d | 1904 | |
82dfc2c4 | 1905 | if (!file->is_binary) { |
a20d3c0d JH |
1906 | adds += added; |
1907 | dels += deleted; | |
1908 | } | |
1909 | if (i < count) | |
1910 | continue; | |
e5f85df8 JH |
1911 | if (!extra_shown) |
1912 | fprintf(options->file, "%s ...\n", line_prefix); | |
1913 | extra_shown = 1; | |
808e1db2 | 1914 | } |
7be57610 | 1915 | fprintf(options->file, "%s", line_prefix); |
7f814632 | 1916 | print_stat_summary(options->file, total_files, adds, dels); |
6973dcae JH |
1917 | } |
1918 | ||
2775d92c | 1919 | static void show_shortstats(struct diffstat_t *data, struct diff_options *options) |
ebd124c6 NP |
1920 | { |
1921 | int i, adds = 0, dels = 0, total_files = data->nr; | |
1922 | ||
1923 | if (data->nr == 0) | |
1924 | return; | |
1925 | ||
1926 | for (i = 0; i < data->nr; i++) { | |
e18872b2 ZJS |
1927 | int added = data->files[i]->added; |
1928 | int deleted= data->files[i]->deleted; | |
1929 | ||
20c8cde4 JH |
1930 | if (data->files[i]->is_unmerged || |
1931 | (!data->files[i]->is_interesting && (added + deleted == 0))) { | |
e18872b2 | 1932 | total_files--; |
de9658b5 | 1933 | } else if (!data->files[i]->is_binary) { /* don't count bytes */ |
e18872b2 ZJS |
1934 | adds += added; |
1935 | dels += deleted; | |
ebd124c6 | 1936 | } |
ebd124c6 | 1937 | } |
30997bb8 | 1938 | fprintf(options->file, "%s", diff_line_prefix(options)); |
7f814632 | 1939 | print_stat_summary(options->file, total_files, adds, dels); |
ebd124c6 NP |
1940 | } |
1941 | ||
4b25d091 | 1942 | static void show_numstat(struct diffstat_t *data, struct diff_options *options) |
74e2abe5 JH |
1943 | { |
1944 | int i; | |
1945 | ||
f604652e JH |
1946 | if (data->nr == 0) |
1947 | return; | |
1948 | ||
74e2abe5 JH |
1949 | for (i = 0; i < data->nr; i++) { |
1950 | struct diffstat_file *file = data->files[i]; | |
1951 | ||
30997bb8 | 1952 | fprintf(options->file, "%s", diff_line_prefix(options)); |
7be57610 | 1953 | |
bfddbc5e | 1954 | if (file->is_binary) |
c0c77734 | 1955 | fprintf(options->file, "-\t-\t"); |
bfddbc5e | 1956 | else |
c0c77734 | 1957 | fprintf(options->file, |
0974c117 JK |
1958 | "%"PRIuMAX"\t%"PRIuMAX"\t", |
1959 | file->added, file->deleted); | |
f604652e JH |
1960 | if (options->line_termination) { |
1961 | fill_print_name(file); | |
1962 | if (!file->is_renamed) | |
c0c77734 | 1963 | write_name_quoted(file->name, options->file, |
f604652e JH |
1964 | options->line_termination); |
1965 | else { | |
c0c77734 DB |
1966 | fputs(file->print_name, options->file); |
1967 | putc(options->line_termination, options->file); | |
f604652e | 1968 | } |
663af342 | 1969 | } else { |
f604652e | 1970 | if (file->is_renamed) { |
c0c77734 DB |
1971 | putc('\0', options->file); |
1972 | write_name_quoted(file->from_name, options->file, '\0'); | |
f604652e | 1973 | } |
c0c77734 | 1974 | write_name_quoted(file->name, options->file, '\0'); |
663af342 | 1975 | } |
74e2abe5 JH |
1976 | } |
1977 | } | |
1978 | ||
c04a7155 JH |
1979 | struct dirstat_file { |
1980 | const char *name; | |
1981 | unsigned long changed; | |
7df7c019 LT |
1982 | }; |
1983 | ||
c04a7155 JH |
1984 | struct dirstat_dir { |
1985 | struct dirstat_file *files; | |
712d2c7d | 1986 | int alloc, nr, permille, cumulative; |
c04a7155 JH |
1987 | }; |
1988 | ||
7be57610 BY |
1989 | static long gather_dirstat(struct diff_options *opt, struct dirstat_dir *dir, |
1990 | unsigned long changed, const char *base, int baselen) | |
7df7c019 LT |
1991 | { |
1992 | unsigned long this_dir = 0; | |
1993 | unsigned int sources = 0; | |
30997bb8 | 1994 | const char *line_prefix = diff_line_prefix(opt); |
7df7c019 LT |
1995 | |
1996 | while (dir->nr) { | |
c04a7155 | 1997 | struct dirstat_file *f = dir->files; |
7df7c019 LT |
1998 | int namelen = strlen(f->name); |
1999 | unsigned long this; | |
2000 | char *slash; | |
2001 | ||
2002 | if (namelen < baselen) | |
2003 | break; | |
2004 | if (memcmp(f->name, base, baselen)) | |
2005 | break; | |
2006 | slash = strchr(f->name + baselen, '/'); | |
2007 | if (slash) { | |
2008 | int newbaselen = slash + 1 - f->name; | |
7be57610 | 2009 | this = gather_dirstat(opt, dir, changed, f->name, newbaselen); |
7df7c019 LT |
2010 | sources++; |
2011 | } else { | |
c04a7155 | 2012 | this = f->changed; |
7df7c019 LT |
2013 | dir->files++; |
2014 | dir->nr--; | |
2015 | sources += 2; | |
2016 | } | |
2017 | this_dir += this; | |
2018 | } | |
2019 | ||
2020 | /* | |
2021 | * We don't report dirstat's for | |
2022 | * - the top level | |
2023 | * - or cases where everything came from a single directory | |
2024 | * under this directory (sources == 1). | |
2025 | */ | |
2026 | if (baselen && sources != 1) { | |
58a8756a JH |
2027 | if (this_dir) { |
2028 | int permille = this_dir * 1000 / changed; | |
712d2c7d | 2029 | if (permille >= dir->permille) { |
7be57610 | 2030 | fprintf(opt->file, "%s%4d.%01d%% %.*s\n", line_prefix, |
712d2c7d | 2031 | permille / 10, permille % 10, baselen, base); |
7df7c019 LT |
2032 | if (!dir->cumulative) |
2033 | return 0; | |
2034 | } | |
2035 | } | |
2036 | } | |
2037 | return this_dir; | |
2038 | } | |
2039 | ||
441bca0b LT |
2040 | static int dirstat_compare(const void *_a, const void *_b) |
2041 | { | |
2042 | const struct dirstat_file *a = _a; | |
2043 | const struct dirstat_file *b = _b; | |
2044 | return strcmp(a->name, b->name); | |
2045 | } | |
2046 | ||
c04a7155 | 2047 | static void show_dirstat(struct diff_options *options) |
7df7c019 LT |
2048 | { |
2049 | int i; | |
2050 | unsigned long changed; | |
c04a7155 JH |
2051 | struct dirstat_dir dir; |
2052 | struct diff_queue_struct *q = &diff_queued_diff; | |
2053 | ||
2054 | dir.files = NULL; | |
2055 | dir.alloc = 0; | |
2056 | dir.nr = 0; | |
712d2c7d | 2057 | dir.permille = options->dirstat_permille; |
f88d225f | 2058 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); |
7df7c019 | 2059 | |
7df7c019 | 2060 | changed = 0; |
c04a7155 JH |
2061 | for (i = 0; i < q->nr; i++) { |
2062 | struct diff_filepair *p = q->queue[i]; | |
2063 | const char *name; | |
2064 | unsigned long copied, added, damage; | |
0133dab7 | 2065 | int content_changed; |
c04a7155 | 2066 | |
2ca86714 | 2067 | name = p->two->path ? p->two->path : p->one->path; |
c04a7155 | 2068 | |
41c9560e | 2069 | if (p->one->oid_valid && p->two->oid_valid) |
a0d12c44 | 2070 | content_changed = oidcmp(&p->one->oid, &p->two->oid); |
0133dab7 JH |
2071 | else |
2072 | content_changed = 1; | |
2073 | ||
2ff3a803 JH |
2074 | if (!content_changed) { |
2075 | /* | |
2076 | * The SHA1 has not changed, so pre-/post-content is | |
2077 | * identical. We can therefore skip looking at the | |
2078 | * file contents altogether. | |
2079 | */ | |
2080 | damage = 0; | |
2081 | goto found_damage; | |
2082 | } | |
2083 | ||
0133dab7 JH |
2084 | if (DIFF_OPT_TST(options, DIRSTAT_BY_FILE)) { |
2085 | /* | |
2086 | * In --dirstat-by-file mode, we don't really need to | |
2087 | * look at the actual file contents at all. | |
2088 | * The fact that the SHA1 changed is enough for us to | |
2089 | * add this file to the list of results | |
2090 | * (with each file contributing equal damage). | |
2091 | */ | |
2ff3a803 | 2092 | damage = 1; |
0133dab7 JH |
2093 | goto found_damage; |
2094 | } | |
c04a7155 JH |
2095 | |
2096 | if (DIFF_FILE_VALID(p->one) && DIFF_FILE_VALID(p->two)) { | |
2097 | diff_populate_filespec(p->one, 0); | |
2098 | diff_populate_filespec(p->two, 0); | |
974e0044 | 2099 | diffcore_count_changes(p->one, p->two, NULL, NULL, |
c04a7155 JH |
2100 | &copied, &added); |
2101 | diff_free_filespec_data(p->one); | |
2102 | diff_free_filespec_data(p->two); | |
2103 | } else if (DIFF_FILE_VALID(p->one)) { | |
8e5dd3d6 | 2104 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY); |
c04a7155 JH |
2105 | copied = added = 0; |
2106 | diff_free_filespec_data(p->one); | |
2107 | } else if (DIFF_FILE_VALID(p->two)) { | |
8e5dd3d6 | 2108 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY); |
c04a7155 JH |
2109 | copied = 0; |
2110 | added = p->two->size; | |
2111 | diff_free_filespec_data(p->two); | |
2112 | } else | |
2b0b551d | 2113 | continue; |
c04a7155 JH |
2114 | |
2115 | /* | |
2116 | * Original minus copied is the removed material, | |
2117 | * added is the new material. They are both damages | |
0133dab7 | 2118 | * made to the preimage. |
2ff3a803 JH |
2119 | * If the resulting damage is zero, we know that |
2120 | * diffcore_count_changes() considers the two entries to | |
2121 | * be identical, but since content_changed is true, we | |
2122 | * know that there must have been _some_ kind of change, | |
2123 | * so we force all entries to have damage > 0. | |
c04a7155 JH |
2124 | */ |
2125 | damage = (p->one->size - copied) + added; | |
2ff3a803 | 2126 | if (!damage) |
fd33777b | 2127 | damage = 1; |
c04a7155 | 2128 | |
0133dab7 | 2129 | found_damage: |
c04a7155 JH |
2130 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); |
2131 | dir.files[dir.nr].name = name; | |
2132 | dir.files[dir.nr].changed = damage; | |
2133 | changed += damage; | |
2134 | dir.nr++; | |
7df7c019 LT |
2135 | } |
2136 | ||
2137 | /* This can happen even with many files, if everything was renames */ | |
2138 | if (!changed) | |
2139 | return; | |
2140 | ||
2141 | /* Show all directories with more than x% of the changes */ | |
9ed0d8d6 | 2142 | QSORT(dir.files, dir.nr, dirstat_compare); |
7be57610 | 2143 | gather_dirstat(options, &dir, changed, "", 0); |
7df7c019 LT |
2144 | } |
2145 | ||
1c57a627 JH |
2146 | static void show_dirstat_by_line(struct diffstat_t *data, struct diff_options *options) |
2147 | { | |
2148 | int i; | |
2149 | unsigned long changed; | |
2150 | struct dirstat_dir dir; | |
2151 | ||
2152 | if (data->nr == 0) | |
2153 | return; | |
2154 | ||
2155 | dir.files = NULL; | |
2156 | dir.alloc = 0; | |
2157 | dir.nr = 0; | |
2158 | dir.permille = options->dirstat_permille; | |
2159 | dir.cumulative = DIFF_OPT_TST(options, DIRSTAT_CUMULATIVE); | |
2160 | ||
2161 | changed = 0; | |
2162 | for (i = 0; i < data->nr; i++) { | |
2163 | struct diffstat_file *file = data->files[i]; | |
2164 | unsigned long damage = file->added + file->deleted; | |
2165 | if (file->is_binary) | |
2166 | /* | |
2167 | * binary files counts bytes, not lines. Must find some | |
2168 | * way to normalize binary bytes vs. textual lines. | |
2169 | * The following heuristic assumes that there are 64 | |
2170 | * bytes per "line". | |
2171 | * This is stupid and ugly, but very cheap... | |
2172 | */ | |
2173 | damage = (damage + 63) / 64; | |
2174 | ALLOC_GROW(dir.files, dir.nr + 1, dir.alloc); | |
2175 | dir.files[dir.nr].name = file->name; | |
2176 | dir.files[dir.nr].changed = damage; | |
2177 | changed += damage; | |
2178 | dir.nr++; | |
2179 | } | |
2180 | ||
2181 | /* This can happen even with many files, if everything was renames */ | |
2182 | if (!changed) | |
2183 | return; | |
2184 | ||
2185 | /* Show all directories with more than x% of the changes */ | |
9ed0d8d6 | 2186 | QSORT(dir.files, dir.nr, dirstat_compare); |
1c57a627 JH |
2187 | gather_dirstat(options, &dir, changed, "", 0); |
2188 | } | |
2189 | ||
f604652e JH |
2190 | static void free_diffstat_info(struct diffstat_t *diffstat) |
2191 | { | |
2192 | int i; | |
2193 | for (i = 0; i < diffstat->nr; i++) { | |
2194 | struct diffstat_file *f = diffstat->files[i]; | |
2195 | if (f->name != f->print_name) | |
2196 | free(f->print_name); | |
2197 | free(f->name); | |
2198 | free(f->from_name); | |
2199 | free(f); | |
2200 | } | |
2201 | free(diffstat->files); | |
2202 | } | |
2203 | ||
88246898 | 2204 | struct checkdiff_t { |
88246898 | 2205 | const char *filename; |
1ba111d1 | 2206 | int lineno; |
a757c646 | 2207 | int conflict_marker_size; |
1ba111d1 | 2208 | struct diff_options *o; |
cf1b7869 | 2209 | unsigned ws_rule; |
62c64895 | 2210 | unsigned status; |
88246898 JS |
2211 | }; |
2212 | ||
a757c646 | 2213 | static int is_conflict_marker(const char *line, int marker_size, unsigned long len) |
04954043 JH |
2214 | { |
2215 | char firstchar; | |
2216 | int cnt; | |
2217 | ||
a757c646 | 2218 | if (len < marker_size + 1) |
04954043 JH |
2219 | return 0; |
2220 | firstchar = line[0]; | |
2221 | switch (firstchar) { | |
a757c646 | 2222 | case '=': case '>': case '<': case '|': |
04954043 JH |
2223 | break; |
2224 | default: | |
2225 | return 0; | |
2226 | } | |
a757c646 | 2227 | for (cnt = 1; cnt < marker_size; cnt++) |
04954043 JH |
2228 | if (line[cnt] != firstchar) |
2229 | return 0; | |
a757c646 JH |
2230 | /* line[1] thru line[marker_size-1] are same as firstchar */ |
2231 | if (len < marker_size + 1 || !isspace(line[marker_size])) | |
04954043 | 2232 | return 0; |
04954043 JH |
2233 | return 1; |
2234 | } | |
2235 | ||
88246898 JS |
2236 | static void checkdiff_consume(void *priv, char *line, unsigned long len) |
2237 | { | |
2238 | struct checkdiff_t *data = priv; | |
a757c646 | 2239 | int marker_size = data->conflict_marker_size; |
f1c96261 JK |
2240 | const char *ws = diff_get_color(data->o->use_color, DIFF_WHITESPACE); |
2241 | const char *reset = diff_get_color(data->o->use_color, DIFF_RESET); | |
2242 | const char *set = diff_get_color(data->o->use_color, DIFF_FILE_NEW); | |
c1795bb0 | 2243 | char *err; |
30997bb8 | 2244 | const char *line_prefix; |
7be57610 BY |
2245 | |
2246 | assert(data->o); | |
30997bb8 | 2247 | line_prefix = diff_line_prefix(data->o); |
88246898 JS |
2248 | |
2249 | if (line[0] == '+') { | |
18374e58 | 2250 | unsigned bad; |
0ef617f4 | 2251 | data->lineno++; |
a757c646 | 2252 | if (is_conflict_marker(line + 1, marker_size, len - 1)) { |
04954043 JH |
2253 | data->status |= 1; |
2254 | fprintf(data->o->file, | |
7be57610 BY |
2255 | "%s%s:%d: leftover conflict marker\n", |
2256 | line_prefix, data->filename, data->lineno); | |
04954043 | 2257 | } |
8f8841e9 | 2258 | bad = ws_check(line + 1, len - 1, data->ws_rule); |
18374e58 | 2259 | if (!bad) |
c1795bb0 | 2260 | return; |
18374e58 JH |
2261 | data->status |= bad; |
2262 | err = whitespace_error_string(bad); | |
7be57610 BY |
2263 | fprintf(data->o->file, "%s%s:%d: %s.\n", |
2264 | line_prefix, data->filename, data->lineno, err); | |
c1795bb0 | 2265 | free(err); |
a3c158d4 | 2266 | emit_line(data->o, set, reset, line, 1); |
8f8841e9 | 2267 | ws_check_emit(line + 1, len - 1, data->ws_rule, |
1ba111d1 | 2268 | data->o->file, set, reset, ws); |
877f23cc | 2269 | } else if (line[0] == ' ') { |
88246898 | 2270 | data->lineno++; |
877f23cc | 2271 | } else if (line[0] == '@') { |
88246898 JS |
2272 | char *plus = strchr(line, '+'); |
2273 | if (plus) | |
0ef617f4 | 2274 | data->lineno = strtol(plus, NULL, 10) - 1; |
88246898 JS |
2275 | else |
2276 | die("invalid diff"); | |
2277 | } | |
2278 | } | |
2279 | ||
0660626c JH |
2280 | static unsigned char *deflate_it(char *data, |
2281 | unsigned long size, | |
2282 | unsigned long *result_size) | |
051308f6 | 2283 | { |
0660626c JH |
2284 | int bound; |
2285 | unsigned char *deflated; | |
ef49a7a0 | 2286 | git_zstream stream; |
0660626c | 2287 | |
55bb5c91 | 2288 | git_deflate_init(&stream, zlib_compression_level); |
225a6f10 | 2289 | bound = git_deflate_bound(&stream, size); |
0660626c JH |
2290 | deflated = xmalloc(bound); |
2291 | stream.next_out = deflated; | |
2292 | stream.avail_out = bound; | |
2293 | ||
2294 | stream.next_in = (unsigned char *)data; | |
2295 | stream.avail_in = size; | |
55bb5c91 | 2296 | while (git_deflate(&stream, Z_FINISH) == Z_OK) |
0660626c | 2297 | ; /* nothing */ |
55bb5c91 | 2298 | git_deflate_end(&stream); |
0660626c JH |
2299 | *result_size = stream.total_out; |
2300 | return deflated; | |
051308f6 JH |
2301 | } |
2302 | ||
32b367e4 JK |
2303 | static void emit_binary_diff_body(FILE *file, mmfile_t *one, mmfile_t *two, |
2304 | const char *prefix) | |
051308f6 | 2305 | { |
0660626c JH |
2306 | void *cp; |
2307 | void *delta; | |
2308 | void *deflated; | |
2309 | void *data; | |
2310 | unsigned long orig_size; | |
2311 | unsigned long delta_size; | |
2312 | unsigned long deflate_size; | |
2313 | unsigned long data_size; | |
051308f6 | 2314 | |
0660626c JH |
2315 | /* We could do deflated delta, or we could do just deflated two, |
2316 | * whichever is smaller. | |
051308f6 | 2317 | */ |
0660626c JH |
2318 | delta = NULL; |
2319 | deflated = deflate_it(two->ptr, two->size, &deflate_size); | |
2320 | if (one->size && two->size) { | |
2321 | delta = diff_delta(one->ptr, one->size, | |
2322 | two->ptr, two->size, | |
2323 | &delta_size, deflate_size); | |
2324 | if (delta) { | |
2325 | void *to_free = delta; | |
2326 | orig_size = delta_size; | |
2327 | delta = deflate_it(delta, delta_size, &delta_size); | |
2328 | free(to_free); | |
051308f6 JH |
2329 | } |
2330 | } | |
051308f6 | 2331 | |
0660626c | 2332 | if (delta && delta_size < deflate_size) { |
7be57610 | 2333 | fprintf(file, "%sdelta %lu\n", prefix, orig_size); |
0660626c JH |
2334 | free(deflated); |
2335 | data = delta; | |
2336 | data_size = delta_size; | |
2337 | } | |
2338 | else { | |
7be57610 | 2339 | fprintf(file, "%sliteral %lu\n", prefix, two->size); |
0660626c JH |
2340 | free(delta); |
2341 | data = deflated; | |
2342 | data_size = deflate_size; | |
2343 | } | |
051308f6 | 2344 | |
0660626c JH |
2345 | /* emit data encoded in base85 */ |
2346 | cp = data; | |
2347 | while (data_size) { | |
2348 | int bytes = (52 < data_size) ? 52 : data_size; | |
051308f6 | 2349 | char line[70]; |
0660626c | 2350 | data_size -= bytes; |
051308f6 JH |
2351 | if (bytes <= 26) |
2352 | line[0] = bytes + 'A' - 1; | |
2353 | else | |
2354 | line[0] = bytes - 26 + 'a' - 1; | |
2355 | encode_85(line + 1, cp, bytes); | |
1d7f171c | 2356 | cp = (char *) cp + bytes; |
7be57610 | 2357 | fprintf(file, "%s", prefix); |
c0c77734 DB |
2358 | fputs(line, file); |
2359 | fputc('\n', file); | |
051308f6 | 2360 | } |
7be57610 | 2361 | fprintf(file, "%s\n", prefix); |
0660626c | 2362 | free(data); |
051308f6 JH |
2363 | } |
2364 | ||
32b367e4 JK |
2365 | static void emit_binary_diff(FILE *file, mmfile_t *one, mmfile_t *two, |
2366 | const char *prefix) | |
d4c452f0 | 2367 | { |
7be57610 BY |
2368 | fprintf(file, "%sGIT binary patch\n", prefix); |
2369 | emit_binary_diff_body(file, one, two, prefix); | |
2370 | emit_binary_diff_body(file, two, one, prefix); | |
d4c452f0 JH |
2371 | } |
2372 | ||
29a3eefd JH |
2373 | int diff_filespec_is_binary(struct diff_filespec *one) |
2374 | { | |
122aa6f9 JK |
2375 | if (one->is_binary == -1) { |
2376 | diff_filespec_load_driver(one); | |
2377 | if (one->driver->binary != -1) | |
2378 | one->is_binary = one->driver->binary; | |
2379 | else { | |
2380 | if (!one->data && DIFF_FILE_VALID(one)) | |
6bf3b813 NTND |
2381 | diff_populate_filespec(one, CHECK_BINARY); |
2382 | if (one->is_binary == -1 && one->data) | |
122aa6f9 JK |
2383 | one->is_binary = buffer_is_binary(one->data, |
2384 | one->size); | |
2385 | if (one->is_binary == -1) | |
2386 | one->is_binary = 0; | |
2387 | } | |
2388 | } | |
29a3eefd | 2389 | return one->is_binary; |
6973dcae JH |
2390 | } |
2391 | ||
be58e70d | 2392 | static const struct userdiff_funcname *diff_funcname_pattern(struct diff_filespec *one) |
f258475a | 2393 | { |
122aa6f9 JK |
2394 | diff_filespec_load_driver(one); |
2395 | return one->driver->funcname.pattern ? &one->driver->funcname : NULL; | |
f258475a JH |
2396 | } |
2397 | ||
a5a818ee JH |
2398 | void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b) |
2399 | { | |
2400 | if (!options->a_prefix) | |
2401 | options->a_prefix = a; | |
2402 | if (!options->b_prefix) | |
2403 | options->b_prefix = b; | |
2404 | } | |
2405 | ||
a788d7d5 | 2406 | struct userdiff_driver *get_textconv(struct diff_filespec *one) |
04427ac8 JK |
2407 | { |
2408 | if (!DIFF_FILE_VALID(one)) | |
2409 | return NULL; | |
d391c0ff | 2410 | |
04427ac8 | 2411 | diff_filespec_load_driver(one); |
3813e690 | 2412 | return userdiff_get_textconv(one->driver); |
04427ac8 JK |
2413 | } |
2414 | ||
6973dcae JH |
2415 | static void builtin_diff(const char *name_a, |
2416 | const char *name_b, | |
2417 | struct diff_filespec *one, | |
2418 | struct diff_filespec *two, | |
2419 | const char *xfrm_msg, | |
296c6bb2 | 2420 | int must_show_header, |
051308f6 | 2421 | struct diff_options *o, |
6973dcae JH |
2422 | int complete_rewrite) |
2423 | { | |
2424 | mmfile_t mf1, mf2; | |
2425 | const char *lbl[2]; | |
2426 | char *a_one, *b_two; | |
d9c552f1 | 2427 | const char *meta = diff_get_color_opt(o, DIFF_METAINFO); |
8f67f8ae | 2428 | const char *reset = diff_get_color_opt(o, DIFF_RESET); |
a5a818ee | 2429 | const char *a_prefix, *b_prefix; |
d9bae1a1 JK |
2430 | struct userdiff_driver *textconv_one = NULL; |
2431 | struct userdiff_driver *textconv_two = NULL; | |
3e97c7c6 | 2432 | struct strbuf header = STRBUF_INIT; |
30997bb8 | 2433 | const char *line_prefix = diff_line_prefix(o); |
a5a818ee | 2434 | |
fd47ae6a JK |
2435 | diff_set_mnemonic_prefix(o, "a/", "b/"); |
2436 | if (DIFF_OPT_TST(o, REVERSE_DIFF)) { | |
2437 | a_prefix = o->b_prefix; | |
2438 | b_prefix = o->a_prefix; | |
2439 | } else { | |
2440 | a_prefix = o->a_prefix; | |
2441 | b_prefix = o->b_prefix; | |
2442 | } | |
2443 | ||
61cfbc05 JK |
2444 | if (o->submodule_format == DIFF_SUBMODULE_LOG && |
2445 | (!one->mode || S_ISGITLINK(one->mode)) && | |
2446 | (!two->mode || S_ISGITLINK(two->mode))) { | |
752c0c24 JS |
2447 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); |
2448 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
3b0c18af | 2449 | show_submodule_summary(o->file, one->path ? one->path : two->path, |
0f33a067 | 2450 | line_prefix, |
602a283a | 2451 | &one->oid, &two->oid, |
a0d12c44 | 2452 | two->dirty_submodule, |
4e215131 | 2453 | meta, del, add, reset); |
752c0c24 | 2454 | return; |
fd47ae6a JK |
2455 | } else if (o->submodule_format == DIFF_SUBMODULE_INLINE_DIFF && |
2456 | (!one->mode || S_ISGITLINK(one->mode)) && | |
2457 | (!two->mode || S_ISGITLINK(two->mode))) { | |
2458 | const char *del = diff_get_color_opt(o, DIFF_FILE_OLD); | |
2459 | const char *add = diff_get_color_opt(o, DIFF_FILE_NEW); | |
2460 | show_submodule_inline_diff(o->file, one->path ? one->path : two->path, | |
2461 | line_prefix, | |
2462 | &one->oid, &two->oid, | |
2463 | two->dirty_submodule, | |
2464 | meta, del, add, reset, o); | |
2465 | return; | |
752c0c24 JS |
2466 | } |
2467 | ||
3aa1f7ca JK |
2468 | if (DIFF_OPT_TST(o, ALLOW_TEXTCONV)) { |
2469 | textconv_one = get_textconv(one); | |
2470 | textconv_two = get_textconv(two); | |
2471 | } | |
2472 | ||
71b989e7 LT |
2473 | /* Never use a non-valid filename anywhere if at all possible */ |
2474 | name_a = DIFF_FILE_VALID(one) ? name_a : name_b; | |
2475 | name_b = DIFF_FILE_VALID(two) ? name_b : name_a; | |
2476 | ||
a5a818ee JH |
2477 | a_one = quote_two(a_prefix, name_a + (*name_a == '/')); |
2478 | b_two = quote_two(b_prefix, name_b + (*name_b == '/')); | |
6973dcae JH |
2479 | lbl[0] = DIFF_FILE_VALID(one) ? a_one : "/dev/null"; |
2480 | lbl[1] = DIFF_FILE_VALID(two) ? b_two : "/dev/null"; | |
d9c552f1 | 2481 | strbuf_addf(&header, "%s%sdiff --git %s %s%s\n", line_prefix, meta, a_one, b_two, reset); |
6973dcae JH |
2482 | if (lbl[0][0] == '/') { |
2483 | /* /dev/null */ | |
d9c552f1 | 2484 | strbuf_addf(&header, "%s%snew file mode %06o%s\n", line_prefix, meta, two->mode, reset); |
37466447 BW |
2485 | if (xfrm_msg) |
2486 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2487 | must_show_header = 1; |
6973dcae JH |
2488 | } |
2489 | else if (lbl[1][0] == '/') { | |
d9c552f1 | 2490 | strbuf_addf(&header, "%s%sdeleted file mode %06o%s\n", line_prefix, meta, one->mode, reset); |
37466447 BW |
2491 | if (xfrm_msg) |
2492 | strbuf_addstr(&header, xfrm_msg); | |
296c6bb2 | 2493 | must_show_header = 1; |
6973dcae JH |
2494 | } |
2495 | else { | |
2496 | if (one->mode != two->mode) { | |
d9c552f1 JK |
2497 | strbuf_addf(&header, "%s%sold mode %06o%s\n", line_prefix, meta, one->mode, reset); |
2498 | strbuf_addf(&header, "%s%snew mode %06o%s\n", line_prefix, meta, two->mode, reset); | |
296c6bb2 | 2499 | must_show_header = 1; |
cd112cef | 2500 | } |
37466447 BW |
2501 | if (xfrm_msg) |
2502 | strbuf_addstr(&header, xfrm_msg); | |
3e97c7c6 | 2503 | |
6973dcae JH |
2504 | /* |
2505 | * we do not run diff between different kind | |
2506 | * of objects. | |
2507 | */ | |
2508 | if ((one->mode ^ two->mode) & S_IFMT) | |
2509 | goto free_ab_and_return; | |
0c01857d | 2510 | if (complete_rewrite && |
3aa1f7ca JK |
2511 | (textconv_one || !diff_filespec_is_binary(one)) && |
2512 | (textconv_two || !diff_filespec_is_binary(two))) { | |
3e97c7c6 GB |
2513 | fprintf(o->file, "%s", header.buf); |
2514 | strbuf_reset(&header); | |
3aa1f7ca JK |
2515 | emit_rewrite_diff(name_a, name_b, one, two, |
2516 | textconv_one, textconv_two, o); | |
34a5e1a2 | 2517 | o->found_changes = 1; |
6973dcae JH |
2518 | goto free_ab_and_return; |
2519 | } | |
2520 | } | |
2521 | ||
467ddc14 JH |
2522 | if (o->irreversible_delete && lbl[1][0] == '/') { |
2523 | fprintf(o->file, "%s", header.buf); | |
2524 | strbuf_reset(&header); | |
2525 | goto free_ab_and_return; | |
2526 | } else if (!DIFF_OPT_TST(o, TEXT) && | |
b3373982 JK |
2527 | ( (!textconv_one && diff_filespec_is_binary(one)) || |
2528 | (!textconv_two && diff_filespec_is_binary(two)) )) { | |
1aaf69e6 NTND |
2529 | if (!one->data && !two->data && |
2530 | S_ISREG(one->mode) && S_ISREG(two->mode) && | |
2531 | !DIFF_OPT_TST(o, BINARY)) { | |
a0d12c44 | 2532 | if (!oidcmp(&one->oid, &two->oid)) { |
1aaf69e6 NTND |
2533 | if (must_show_header) |
2534 | fprintf(o->file, "%s", header.buf); | |
2535 | goto free_ab_and_return; | |
2536 | } | |
2537 | fprintf(o->file, "%s", header.buf); | |
2538 | fprintf(o->file, "%sBinary files %s and %s differ\n", | |
2539 | line_prefix, lbl[0], lbl[1]); | |
2540 | goto free_ab_and_return; | |
2541 | } | |
b3373982 JK |
2542 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
2543 | die("unable to read files to diff"); | |
0660626c JH |
2544 | /* Quite common confusing case */ |
2545 | if (mf1.size == mf2.size && | |
296c6bb2 CC |
2546 | !memcmp(mf1.ptr, mf2.ptr, mf1.size)) { |
2547 | if (must_show_header) | |
2548 | fprintf(o->file, "%s", header.buf); | |
0660626c | 2549 | goto free_ab_and_return; |
296c6bb2 | 2550 | } |
3e97c7c6 GB |
2551 | fprintf(o->file, "%s", header.buf); |
2552 | strbuf_reset(&header); | |
8f67f8ae | 2553 | if (DIFF_OPT_TST(o, BINARY)) |
7be57610 | 2554 | emit_binary_diff(o->file, &mf1, &mf2, line_prefix); |
051308f6 | 2555 | else |
7be57610 BY |
2556 | fprintf(o->file, "%sBinary files %s and %s differ\n", |
2557 | line_prefix, lbl[0], lbl[1]); | |
34a5e1a2 | 2558 | o->found_changes = 1; |
467ddc14 | 2559 | } else { |
6973dcae JH |
2560 | /* Crazy xdl interfaces.. */ |
2561 | const char *diffopts = getenv("GIT_DIFF_OPTS"); | |
ae021d87 | 2562 | const char *v; |
6973dcae JH |
2563 | xpparam_t xpp; |
2564 | xdemitconf_t xecfg; | |
6973dcae | 2565 | struct emit_callback ecbdata; |
be58e70d | 2566 | const struct userdiff_funcname *pe; |
f258475a | 2567 | |
b3f01ff2 | 2568 | if (must_show_header) { |
3e97c7c6 GB |
2569 | fprintf(o->file, "%s", header.buf); |
2570 | strbuf_reset(&header); | |
2571 | } | |
2572 | ||
840383b2 JK |
2573 | mf1.size = fill_textconv(textconv_one, one, &mf1.ptr); |
2574 | mf2.size = fill_textconv(textconv_two, two, &mf2.ptr); | |
04427ac8 | 2575 | |
45e7ca0f BC |
2576 | pe = diff_funcname_pattern(one); |
2577 | if (!pe) | |
2578 | pe = diff_funcname_pattern(two); | |
6973dcae | 2579 | |
9ccd0a88 | 2580 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2581 | memset(&xecfg, 0, sizeof(xecfg)); |
cd112cef | 2582 | memset(&ecbdata, 0, sizeof(ecbdata)); |
6973dcae | 2583 | ecbdata.label_path = lbl; |
daa0c3d9 | 2584 | ecbdata.color_diff = want_color(o->use_color); |
c189c4f2 | 2585 | ecbdata.ws_rule = whitespace_rule(name_b); |
690ed843 | 2586 | if (ecbdata.ws_rule & WS_BLANK_AT_EOF) |
d68fe26f | 2587 | check_blank_at_eof(&mf1, &mf2, &ecbdata); |
a3c158d4 | 2588 | ecbdata.opt = o; |
3e97c7c6 | 2589 | ecbdata.header = header.len ? &header : NULL; |
582aa00b | 2590 | xpp.flags = o->xdl_opts; |
ee1e5412 | 2591 | xecfg.ctxlen = o->context; |
6d0e674a | 2592 | xecfg.interhunkctxlen = o->interhunkcontext; |
6973dcae | 2593 | xecfg.flags = XDL_EMIT_FUNCNAMES; |
14937c2c RS |
2594 | if (DIFF_OPT_TST(o, FUNCCONTEXT)) |
2595 | xecfg.flags |= XDL_EMIT_FUNCCONTEXT; | |
45e7ca0f | 2596 | if (pe) |
a013585b | 2597 | xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags); |
6973dcae JH |
2598 | if (!diffopts) |
2599 | ; | |
ae021d87 JK |
2600 | else if (skip_prefix(diffopts, "--unified=", &v)) |
2601 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
2602 | else if (skip_prefix(diffopts, "-u", &v)) | |
2603 | xecfg.ctxlen = strtoul(v, NULL, 10); | |
77d1a520 TR |
2604 | if (o->word_diff) |
2605 | init_diff_words_data(&ecbdata, o, one, two); | |
3efb9880 JK |
2606 | if (xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata, |
2607 | &xpp, &xecfg)) | |
2608 | die("unable to generate diff for %s", one->path); | |
882749a0 | 2609 | if (o->word_diff) |
f59a59e2 | 2610 | free_diff_words_data(&ecbdata); |
04427ac8 JK |
2611 | if (textconv_one) |
2612 | free(mf1.ptr); | |
2613 | if (textconv_two) | |
2614 | free(mf2.ptr); | |
8cfe5f1c | 2615 | xdiff_clear_find_func(&xecfg); |
6973dcae JH |
2616 | } |
2617 | ||
2618 | free_ab_and_return: | |
3e97c7c6 | 2619 | strbuf_release(&header); |
fc3abdf5 JH |
2620 | diff_free_filespec_data(one); |
2621 | diff_free_filespec_data(two); | |
6973dcae JH |
2622 | free(a_one); |
2623 | free(b_two); | |
2624 | return; | |
2625 | } | |
2626 | ||
2627 | static void builtin_diffstat(const char *name_a, const char *name_b, | |
2628 | struct diff_filespec *one, | |
2629 | struct diff_filespec *two, | |
710158e3 | 2630 | struct diffstat_t *diffstat, |
0d21efa5 | 2631 | struct diff_options *o, |
74faaa16 | 2632 | struct diff_filepair *p) |
6973dcae JH |
2633 | { |
2634 | mmfile_t mf1, mf2; | |
2635 | struct diffstat_file *data; | |
352ca4e1 | 2636 | int same_contents; |
74faaa16 LT |
2637 | int complete_rewrite = 0; |
2638 | ||
2639 | if (!DIFF_PAIR_UNMERGED(p)) { | |
2640 | if (p->status == DIFF_STATUS_MODIFIED && p->score) | |
2641 | complete_rewrite = 1; | |
2642 | } | |
6973dcae JH |
2643 | |
2644 | data = diffstat_add(diffstat, name_a, name_b); | |
99bfd407 | 2645 | data->is_interesting = p->status != DIFF_STATUS_UNKNOWN; |
6973dcae JH |
2646 | |
2647 | if (!one || !two) { | |
2648 | data->is_unmerged = 1; | |
2649 | return; | |
2650 | } | |
ded0abc7 | 2651 | |
a0d12c44 | 2652 | same_contents = !oidcmp(&one->oid, &two->oid); |
352ca4e1 | 2653 | |
ded0abc7 | 2654 | if (diff_filespec_is_binary(one) || diff_filespec_is_binary(two)) { |
ded0abc7 | 2655 | data->is_binary = 1; |
352ca4e1 | 2656 | if (same_contents) { |
e18872b2 ZJS |
2657 | data->added = 0; |
2658 | data->deleted = 0; | |
2659 | } else { | |
2660 | data->added = diff_filespec_size(two); | |
2661 | data->deleted = diff_filespec_size(one); | |
2662 | } | |
ded0abc7 JK |
2663 | } |
2664 | ||
2665 | else if (complete_rewrite) { | |
710158e3 JH |
2666 | diff_populate_filespec(one, 0); |
2667 | diff_populate_filespec(two, 0); | |
2668 | data->deleted = count_lines(one->data, one->size); | |
2669 | data->added = count_lines(two->data, two->size); | |
710158e3 | 2670 | } |
6973dcae | 2671 | |
352ca4e1 | 2672 | else if (!same_contents) { |
6973dcae JH |
2673 | /* Crazy xdl interfaces.. */ |
2674 | xpparam_t xpp; | |
2675 | xdemitconf_t xecfg; | |
6973dcae | 2676 | |
ded0abc7 JK |
2677 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) |
2678 | die("unable to read files to diff"); | |
2679 | ||
9ccd0a88 | 2680 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2681 | memset(&xecfg, 0, sizeof(xecfg)); |
582aa00b | 2682 | xpp.flags = o->xdl_opts; |
f01cae91 JH |
2683 | xecfg.ctxlen = o->context; |
2684 | xecfg.interhunkctxlen = o->interhunkcontext; | |
3efb9880 JK |
2685 | if (xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat, |
2686 | &xpp, &xecfg)) | |
2687 | die("unable to generate diffstat for %s", one->path); | |
6973dcae | 2688 | } |
fc3abdf5 | 2689 | |
fc3abdf5 JH |
2690 | diff_free_filespec_data(one); |
2691 | diff_free_filespec_data(two); | |
6973dcae JH |
2692 | } |
2693 | ||
88246898 | 2694 | static void builtin_checkdiff(const char *name_a, const char *name_b, |
cd676a51 | 2695 | const char *attr_path, |
5ff10dd6 JH |
2696 | struct diff_filespec *one, |
2697 | struct diff_filespec *two, | |
2698 | struct diff_options *o) | |
88246898 JS |
2699 | { |
2700 | mmfile_t mf1, mf2; | |
2701 | struct checkdiff_t data; | |
2702 | ||
2703 | if (!two) | |
2704 | return; | |
2705 | ||
2706 | memset(&data, 0, sizeof(data)); | |
88246898 JS |
2707 | data.filename = name_b ? name_b : name_a; |
2708 | data.lineno = 0; | |
1ba111d1 | 2709 | data.o = o; |
cd676a51 | 2710 | data.ws_rule = whitespace_rule(attr_path); |
a757c646 | 2711 | data.conflict_marker_size = ll_merge_marker_size(attr_path); |
88246898 JS |
2712 | |
2713 | if (fill_mmfile(&mf1, one) < 0 || fill_mmfile(&mf2, two) < 0) | |
2714 | die("unable to read files to diff"); | |
2715 | ||
5ff10dd6 JH |
2716 | /* |
2717 | * All the other codepaths check both sides, but not checking | |
2718 | * the "old" side here is deliberate. We are checking the newly | |
2719 | * introduced changes, and as long as the "new" side is text, we | |
2720 | * can and should check what it introduces. | |
2721 | */ | |
29a3eefd | 2722 | if (diff_filespec_is_binary(two)) |
fc3abdf5 | 2723 | goto free_and_return; |
88246898 JS |
2724 | else { |
2725 | /* Crazy xdl interfaces.. */ | |
2726 | xpparam_t xpp; | |
2727 | xdemitconf_t xecfg; | |
88246898 | 2728 | |
9ccd0a88 | 2729 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 2730 | memset(&xecfg, 0, sizeof(xecfg)); |
c35539eb | 2731 | xecfg.ctxlen = 1; /* at least one context line */ |
582aa00b | 2732 | xpp.flags = 0; |
3efb9880 JK |
2733 | if (xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data, |
2734 | &xpp, &xecfg)) | |
2735 | die("unable to generate checkdiff for %s", one->path); | |
877f23cc | 2736 | |
467babf8 | 2737 | if (data.ws_rule & WS_BLANK_AT_EOF) { |
d68fe26f JH |
2738 | struct emit_callback ecbdata; |
2739 | int blank_at_eof; | |
2740 | ||
2741 | ecbdata.ws_rule = data.ws_rule; | |
2742 | check_blank_at_eof(&mf1, &mf2, &ecbdata); | |
8837d335 | 2743 | blank_at_eof = ecbdata.blank_at_eof_in_postimage; |
d68fe26f | 2744 | |
467babf8 JH |
2745 | if (blank_at_eof) { |
2746 | static char *err; | |
2747 | if (!err) | |
2748 | err = whitespace_error_string(WS_BLANK_AT_EOF); | |
2749 | fprintf(o->file, "%s:%d: %s.\n", | |
2750 | data.filename, blank_at_eof, err); | |
2751 | data.status = 1; /* report errors */ | |
2752 | } | |
877f23cc | 2753 | } |
88246898 | 2754 | } |
fc3abdf5 JH |
2755 | free_and_return: |
2756 | diff_free_filespec_data(one); | |
2757 | diff_free_filespec_data(two); | |
62c64895 WC |
2758 | if (data.status) |
2759 | DIFF_OPT_SET(o, CHECK_FAILED); | |
88246898 JS |
2760 | } |
2761 | ||
6973dcae JH |
2762 | struct diff_filespec *alloc_filespec(const char *path) |
2763 | { | |
96ffc06f | 2764 | struct diff_filespec *spec; |
6973dcae | 2765 | |
96ffc06f | 2766 | FLEXPTR_ALLOC_STR(spec, path, path); |
9fb88419 | 2767 | spec->count = 1; |
122aa6f9 | 2768 | spec->is_binary = -1; |
6973dcae JH |
2769 | return spec; |
2770 | } | |
2771 | ||
9fb88419 LT |
2772 | void free_filespec(struct diff_filespec *spec) |
2773 | { | |
2774 | if (!--spec->count) { | |
2775 | diff_free_filespec_data(spec); | |
2776 | free(spec); | |
2777 | } | |
2778 | } | |
2779 | ||
f9704c2d BW |
2780 | void fill_filespec(struct diff_filespec *spec, const struct object_id *oid, |
2781 | int oid_valid, unsigned short mode) | |
6973dcae JH |
2782 | { |
2783 | if (mode) { | |
2784 | spec->mode = canon_mode(mode); | |
f9704c2d BW |
2785 | oidcpy(&spec->oid, oid); |
2786 | spec->oid_valid = oid_valid; | |
6973dcae JH |
2787 | } |
2788 | } | |
2789 | ||
2790 | /* | |
5adf317b | 2791 | * Given a name and sha1 pair, if the index tells us the file in |
6973dcae JH |
2792 | * the work tree has that object contents, return true, so that |
2793 | * prepare_temp_file() does not have to inflate and extract. | |
2794 | */ | |
fb4a1c0d | 2795 | static int reuse_worktree_file(const char *name, const struct object_id *oid, int want_file) |
6973dcae | 2796 | { |
9c5e6c80 | 2797 | const struct cache_entry *ce; |
6973dcae JH |
2798 | struct stat st; |
2799 | int pos, len; | |
2800 | ||
150115ad JH |
2801 | /* |
2802 | * We do not read the cache ourselves here, because the | |
6973dcae JH |
2803 | * benchmark with my previous version that always reads cache |
2804 | * shows that it makes things worse for diff-tree comparing | |
2805 | * two linux-2.6 kernel trees in an already checked out work | |
2806 | * tree. This is because most diff-tree comparisons deal with | |
2807 | * only a small number of files, while reading the cache is | |
2808 | * expensive for a large project, and its cost outweighs the | |
2809 | * savings we get by not inflating the object to a temporary | |
2810 | * file. Practically, this code only helps when we are used | |
2811 | * by diff-cache --cached, which does read the cache before | |
2812 | * calling us. | |
2813 | */ | |
2814 | if (!active_cache) | |
2815 | return 0; | |
2816 | ||
1510fea7 SP |
2817 | /* We want to avoid the working directory if our caller |
2818 | * doesn't need the data in a normal file, this system | |
2819 | * is rather slow with its stat/open/mmap/close syscalls, | |
2820 | * and the object is contained in a pack file. The pack | |
2821 | * is probably already open and will be faster to obtain | |
2822 | * the data through than the working directory. Loose | |
2823 | * objects however would tend to be slower as they need | |
2824 | * to be individually opened and inflated. | |
2825 | */ | |
fb4a1c0d | 2826 | if (!FAST_WORKING_DIRECTORY && !want_file && has_sha1_pack(oid->hash)) |
1510fea7 SP |
2827 | return 0; |
2828 | ||
06dec439 JK |
2829 | /* |
2830 | * Similarly, if we'd have to convert the file contents anyway, that | |
2831 | * makes the optimization not worthwhile. | |
2832 | */ | |
82b474e0 | 2833 | if (!want_file && would_convert_to_git(&the_index, name)) |
06dec439 JK |
2834 | return 0; |
2835 | ||
6973dcae JH |
2836 | len = strlen(name); |
2837 | pos = cache_name_pos(name, len); | |
2838 | if (pos < 0) | |
2839 | return 0; | |
2840 | ce = active_cache[pos]; | |
eadb5831 JH |
2841 | |
2842 | /* | |
2843 | * This is not the sha1 we are looking for, or | |
2844 | * unreusable because it is not a regular file. | |
2845 | */ | |
fb4a1c0d | 2846 | if (oidcmp(oid, &ce->oid) || !S_ISREG(ce->ce_mode)) |
6973dcae | 2847 | return 0; |
eadb5831 | 2848 | |
150115ad JH |
2849 | /* |
2850 | * If ce is marked as "assume unchanged", there is no | |
2851 | * guarantee that work tree matches what we are looking for. | |
2852 | */ | |
b4d1690d | 2853 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) |
150115ad JH |
2854 | return 0; |
2855 | ||
eadb5831 JH |
2856 | /* |
2857 | * If ce matches the file in the work tree, we can reuse it. | |
6973dcae | 2858 | */ |
eadb5831 JH |
2859 | if (ce_uptodate(ce) || |
2860 | (!lstat(name, &st) && !ce_match_stat(ce, &st, 0))) | |
2861 | return 1; | |
2862 | ||
2863 | return 0; | |
6973dcae JH |
2864 | } |
2865 | ||
04786756 LT |
2866 | static int diff_populate_gitlink(struct diff_filespec *s, int size_only) |
2867 | { | |
b1ddfb91 JK |
2868 | struct strbuf buf = STRBUF_INIT; |
2869 | char *dirty = ""; | |
8e08b419 JH |
2870 | |
2871 | /* Are we looking at the work tree? */ | |
85adbf2f | 2872 | if (s->dirty_submodule) |
8e08b419 JH |
2873 | dirty = "-dirty"; |
2874 | ||
a0d12c44 | 2875 | strbuf_addf(&buf, "Subproject commit %s%s\n", |
2876 | oid_to_hex(&s->oid), dirty); | |
b1ddfb91 | 2877 | s->size = buf.len; |
04786756 LT |
2878 | if (size_only) { |
2879 | s->data = NULL; | |
b1ddfb91 JK |
2880 | strbuf_release(&buf); |
2881 | } else { | |
2882 | s->data = strbuf_detach(&buf, NULL); | |
2883 | s->should_free = 1; | |
04786756 LT |
2884 | } |
2885 | return 0; | |
2886 | } | |
2887 | ||
6973dcae JH |
2888 | /* |
2889 | * While doing rename detection and pickaxe operation, we may need to | |
2890 | * grab the data for the blob (or file) for our own in-core comparison. | |
2891 | * diff_filespec has data and size fields for this purpose. | |
2892 | */ | |
8e5dd3d6 | 2893 | int diff_populate_filespec(struct diff_filespec *s, unsigned int flags) |
6973dcae | 2894 | { |
8e5dd3d6 | 2895 | int size_only = flags & CHECK_SIZE_ONLY; |
6973dcae | 2896 | int err = 0; |
5430bb28 JH |
2897 | /* |
2898 | * demote FAIL to WARN to allow inspecting the situation | |
2899 | * instead of refusing. | |
2900 | */ | |
2901 | enum safe_crlf crlf_warn = (safe_crlf == SAFE_CRLF_FAIL | |
2902 | ? SAFE_CRLF_WARN | |
2903 | : safe_crlf); | |
2904 | ||
6973dcae JH |
2905 | if (!DIFF_FILE_VALID(s)) |
2906 | die("internal error: asking to populate invalid file."); | |
2907 | if (S_ISDIR(s->mode)) | |
2908 | return -1; | |
2909 | ||
6973dcae | 2910 | if (s->data) |
fc3abdf5 | 2911 | return 0; |
04786756 | 2912 | |
6e0b8ed6 JH |
2913 | if (size_only && 0 < s->size) |
2914 | return 0; | |
2915 | ||
302b9282 | 2916 | if (S_ISGITLINK(s->mode)) |
04786756 LT |
2917 | return diff_populate_gitlink(s, size_only); |
2918 | ||
41c9560e | 2919 | if (!s->oid_valid || |
fb4a1c0d | 2920 | reuse_worktree_file(s->path, &s->oid, 0)) { |
f285a2d7 | 2921 | struct strbuf buf = STRBUF_INIT; |
6973dcae JH |
2922 | struct stat st; |
2923 | int fd; | |
6c510bee | 2924 | |
6973dcae JH |
2925 | if (lstat(s->path, &st) < 0) { |
2926 | if (errno == ENOENT) { | |
2927 | err_empty: | |
2928 | err = -1; | |
2929 | empty: | |
d2543b8e | 2930 | s->data = (char *)""; |
6973dcae JH |
2931 | s->size = 0; |
2932 | return err; | |
2933 | } | |
2934 | } | |
dc49cd76 | 2935 | s->size = xsize_t(st.st_size); |
6973dcae JH |
2936 | if (!s->size) |
2937 | goto empty; | |
6973dcae | 2938 | if (S_ISLNK(st.st_mode)) { |
cf219d8c LT |
2939 | struct strbuf sb = STRBUF_INIT; |
2940 | ||
2941 | if (strbuf_readlink(&sb, s->path, s->size)) | |
6973dcae | 2942 | goto err_empty; |
0956a6db RS |
2943 | s->size = sb.len; |
2944 | s->data = strbuf_detach(&sb, NULL); | |
cf219d8c | 2945 | s->should_free = 1; |
6973dcae JH |
2946 | return 0; |
2947 | } | |
12426e11 JH |
2948 | |
2949 | /* | |
2950 | * Even if the caller would be happy with getting | |
2951 | * only the size, we cannot return early at this | |
2952 | * point if the path requires us to run the content | |
2953 | * conversion. | |
2954 | */ | |
82b474e0 | 2955 | if (size_only && !would_convert_to_git(&the_index, s->path)) |
cf219d8c | 2956 | return 0; |
12426e11 JH |
2957 | |
2958 | /* | |
2959 | * Note: this check uses xsize_t(st.st_size) that may | |
2960 | * not be the true size of the blob after it goes | |
2961 | * through convert_to_git(). This may not strictly be | |
2962 | * correct, but the whole point of big_file_threshold | |
2963 | * and is_binary check being that we want to avoid | |
2964 | * opening the file and inspecting the contents, this | |
2965 | * is probably fine. | |
2966 | */ | |
6bf3b813 NTND |
2967 | if ((flags & CHECK_BINARY) && |
2968 | s->size > big_file_threshold && s->is_binary == -1) { | |
2969 | s->is_binary = 1; | |
2970 | return 0; | |
2971 | } | |
6973dcae JH |
2972 | fd = open(s->path, O_RDONLY); |
2973 | if (fd < 0) | |
2974 | goto err_empty; | |
c4712e45 | 2975 | s->data = xmmap(NULL, s->size, PROT_READ, MAP_PRIVATE, fd, 0); |
6973dcae | 2976 | close(fd); |
6973dcae | 2977 | s->should_munmap = 1; |
6c510bee LT |
2978 | |
2979 | /* | |
2980 | * Convert from working tree format to canonical git format | |
2981 | */ | |
82b474e0 | 2982 | if (convert_to_git(&the_index, s->path, s->data, s->size, &buf, crlf_warn)) { |
c32f749f | 2983 | size_t size = 0; |
6c510bee LT |
2984 | munmap(s->data, s->size); |
2985 | s->should_munmap = 0; | |
c32f749f RS |
2986 | s->data = strbuf_detach(&buf, &size); |
2987 | s->size = size; | |
6c510bee LT |
2988 | s->should_free = 1; |
2989 | } | |
6973dcae JH |
2990 | } |
2991 | else { | |
21666f1a | 2992 | enum object_type type; |
6bf3b813 | 2993 | if (size_only || (flags & CHECK_BINARY)) { |
a0d12c44 | 2994 | type = sha1_object_info(s->oid.hash, &s->size); |
c50c4316 | 2995 | if (type < 0) |
a0d12c44 | 2996 | die("unable to read %s", |
2997 | oid_to_hex(&s->oid)); | |
6bf3b813 NTND |
2998 | if (size_only) |
2999 | return 0; | |
3000 | if (s->size > big_file_threshold && s->is_binary == -1) { | |
3001 | s->is_binary = 1; | |
3002 | return 0; | |
3003 | } | |
6973dcae | 3004 | } |
a0d12c44 | 3005 | s->data = read_sha1_file(s->oid.hash, &type, &s->size); |
6bf3b813 | 3006 | if (!s->data) |
a0d12c44 | 3007 | die("unable to read %s", oid_to_hex(&s->oid)); |
6bf3b813 | 3008 | s->should_free = 1; |
6973dcae JH |
3009 | } |
3010 | return 0; | |
3011 | } | |
3012 | ||
8ae92e63 | 3013 | void diff_free_filespec_blob(struct diff_filespec *s) |
6973dcae JH |
3014 | { |
3015 | if (s->should_free) | |
3016 | free(s->data); | |
3017 | else if (s->should_munmap) | |
3018 | munmap(s->data, s->size); | |
fc3abdf5 JH |
3019 | |
3020 | if (s->should_free || s->should_munmap) { | |
3021 | s->should_free = s->should_munmap = 0; | |
3022 | s->data = NULL; | |
3023 | } | |
eede7b7d JK |
3024 | } |
3025 | ||
3026 | void diff_free_filespec_data(struct diff_filespec *s) | |
3027 | { | |
8ae92e63 | 3028 | diff_free_filespec_blob(s); |
6a83d902 | 3029 | FREE_AND_NULL(s->cnt_data); |
6973dcae JH |
3030 | } |
3031 | ||
4e218f54 | 3032 | static void prep_temp_blob(const char *path, struct diff_tempfile *temp, |
6973dcae JH |
3033 | void *blob, |
3034 | unsigned long size, | |
09bdff29 | 3035 | const struct object_id *oid, |
6973dcae JH |
3036 | int mode) |
3037 | { | |
3038 | int fd; | |
4e218f54 | 3039 | struct strbuf buf = STRBUF_INIT; |
003b33a8 DA |
3040 | struct strbuf template = STRBUF_INIT; |
3041 | char *path_dup = xstrdup(path); | |
3042 | const char *base = basename(path_dup); | |
6973dcae | 3043 | |
003b33a8 DA |
3044 | /* Generate "XXXXXX_basename.ext" */ |
3045 | strbuf_addstr(&template, "XXXXXX_"); | |
3046 | strbuf_addstr(&template, base); | |
3047 | ||
284098f1 | 3048 | fd = mks_tempfile_ts(&temp->tempfile, template.buf, strlen(base) + 1); |
6973dcae | 3049 | if (fd < 0) |
d824cbba | 3050 | die_errno("unable to create temp-file"); |
4e218f54 JS |
3051 | if (convert_to_working_tree(path, |
3052 | (const char *)blob, (size_t)size, &buf)) { | |
3053 | blob = buf.buf; | |
3054 | size = buf.len; | |
3055 | } | |
93822c22 | 3056 | if (write_in_full(fd, blob, size) != size) |
0721c314 | 3057 | die_errno("unable to write temp-file"); |
284098f1 MH |
3058 | close_tempfile(&temp->tempfile); |
3059 | temp->name = get_tempfile_path(&temp->tempfile); | |
09bdff29 | 3060 | oid_to_hex_r(temp->hex, oid); |
5096d490 | 3061 | xsnprintf(temp->mode, sizeof(temp->mode), "%06o", mode); |
4e218f54 | 3062 | strbuf_release(&buf); |
003b33a8 DA |
3063 | strbuf_release(&template); |
3064 | free(path_dup); | |
6973dcae JH |
3065 | } |
3066 | ||
479b0ae8 JK |
3067 | static struct diff_tempfile *prepare_temp_file(const char *name, |
3068 | struct diff_filespec *one) | |
6973dcae | 3069 | { |
479b0ae8 JK |
3070 | struct diff_tempfile *temp = claim_diff_tempfile(); |
3071 | ||
6973dcae JH |
3072 | if (!DIFF_FILE_VALID(one)) { |
3073 | not_a_valid_file: | |
3074 | /* A '-' entry produces this for file-2, and | |
3075 | * a '+' entry produces this for file-1. | |
3076 | */ | |
3077 | temp->name = "/dev/null"; | |
5096d490 JK |
3078 | xsnprintf(temp->hex, sizeof(temp->hex), "."); |
3079 | xsnprintf(temp->mode, sizeof(temp->mode), "."); | |
479b0ae8 JK |
3080 | return temp; |
3081 | } | |
3082 | ||
aba47272 | 3083 | if (!S_ISGITLINK(one->mode) && |
41c9560e | 3084 | (!one->oid_valid || |
fb4a1c0d | 3085 | reuse_worktree_file(name, &one->oid, 1))) { |
6973dcae JH |
3086 | struct stat st; |
3087 | if (lstat(name, &st) < 0) { | |
3088 | if (errno == ENOENT) | |
3089 | goto not_a_valid_file; | |
d824cbba | 3090 | die_errno("stat(%s)", name); |
6973dcae JH |
3091 | } |
3092 | if (S_ISLNK(st.st_mode)) { | |
3cd7388d JK |
3093 | struct strbuf sb = STRBUF_INIT; |
3094 | if (strbuf_readlink(&sb, name, st.st_size) < 0) | |
0721c314 | 3095 | die_errno("readlink(%s)", name); |
3cd7388d | 3096 | prep_temp_blob(name, temp, sb.buf, sb.len, |
41c9560e | 3097 | (one->oid_valid ? |
09bdff29 | 3098 | &one->oid : &null_oid), |
41c9560e | 3099 | (one->oid_valid ? |
6973dcae | 3100 | one->mode : S_IFLNK)); |
3cd7388d | 3101 | strbuf_release(&sb); |
6973dcae JH |
3102 | } |
3103 | else { | |
3104 | /* we can borrow from the file in the work tree */ | |
3105 | temp->name = name; | |
41c9560e | 3106 | if (!one->oid_valid) |
74014152 | 3107 | oid_to_hex_r(temp->hex, &null_oid); |
6973dcae | 3108 | else |
2490574d | 3109 | oid_to_hex_r(temp->hex, &one->oid); |
6973dcae JH |
3110 | /* Even though we may sometimes borrow the |
3111 | * contents from the work tree, we always want | |
3112 | * one->mode. mode is trustworthy even when | |
74014152 | 3113 | * !(one->oid_valid), as long as |
6973dcae JH |
3114 | * DIFF_FILE_VALID(one). |
3115 | */ | |
5096d490 | 3116 | xsnprintf(temp->mode, sizeof(temp->mode), "%06o", one->mode); |
6973dcae | 3117 | } |
479b0ae8 | 3118 | return temp; |
6973dcae JH |
3119 | } |
3120 | else { | |
3121 | if (diff_populate_filespec(one, 0)) | |
3122 | die("cannot read data blob for %s", one->path); | |
4e218f54 | 3123 | prep_temp_blob(name, temp, one->data, one->size, |
09bdff29 | 3124 | &one->oid, one->mode); |
6973dcae | 3125 | } |
479b0ae8 | 3126 | return temp; |
6973dcae JH |
3127 | } |
3128 | ||
f3efe787 JK |
3129 | static void add_external_diff_name(struct argv_array *argv, |
3130 | const char *name, | |
3131 | struct diff_filespec *df) | |
3132 | { | |
3133 | struct diff_tempfile *temp = prepare_temp_file(name, df); | |
3134 | argv_array_push(argv, temp->name); | |
3135 | argv_array_push(argv, temp->hex); | |
3136 | argv_array_push(argv, temp->mode); | |
3137 | } | |
3138 | ||
6973dcae JH |
3139 | /* An external diff command takes: |
3140 | * | |
3141 | * diff-cmd name infile1 infile1-sha1 infile1-mode \ | |
3142 | * infile2 infile2-sha1 infile2-mode [ rename-to ] | |
3143 | * | |
3144 | */ | |
3145 | static void run_external_diff(const char *pgm, | |
3146 | const char *name, | |
3147 | const char *other, | |
3148 | struct diff_filespec *one, | |
3149 | struct diff_filespec *two, | |
3150 | const char *xfrm_msg, | |
ee7fb0b1 ZK |
3151 | int complete_rewrite, |
3152 | struct diff_options *o) | |
6973dcae | 3153 | { |
82fbf269 | 3154 | struct argv_array argv = ARGV_ARRAY_INIT; |
ae049c95 | 3155 | struct argv_array env = ARGV_ARRAY_INIT; |
ee7fb0b1 | 3156 | struct diff_queue_struct *q = &diff_queued_diff; |
6973dcae | 3157 | |
0d4217d9 JK |
3158 | argv_array_push(&argv, pgm); |
3159 | argv_array_push(&argv, name); | |
6973dcae | 3160 | |
6973dcae | 3161 | if (one && two) { |
f3efe787 JK |
3162 | add_external_diff_name(&argv, name, one); |
3163 | if (!other) | |
3164 | add_external_diff_name(&argv, name, two); | |
3165 | else { | |
3166 | add_external_diff_name(&argv, other, two); | |
82fbf269 JK |
3167 | argv_array_push(&argv, other); |
3168 | argv_array_push(&argv, xfrm_msg); | |
6973dcae | 3169 | } |
6973dcae | 3170 | } |
ee7fb0b1 | 3171 | |
ae049c95 JK |
3172 | argv_array_pushf(&env, "GIT_DIFF_PATH_COUNTER=%d", ++o->diff_path_counter); |
3173 | argv_array_pushf(&env, "GIT_DIFF_PATH_TOTAL=%d", q->nr); | |
ee7fb0b1 | 3174 | |
89294d14 JK |
3175 | if (run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env.argv)) |
3176 | die(_("external diff died, stopping at %s"), name); | |
ee7fb0b1 | 3177 | |
6973dcae | 3178 | remove_tempfile(); |
82fbf269 | 3179 | argv_array_clear(&argv); |
ae049c95 | 3180 | argv_array_clear(&env); |
6973dcae JH |
3181 | } |
3182 | ||
b67b9612 JH |
3183 | static int similarity_index(struct diff_filepair *p) |
3184 | { | |
3185 | return p->score * 100 / MAX_SCORE; | |
3186 | } | |
3187 | ||
4f03666a JK |
3188 | static const char *diff_abbrev_oid(const struct object_id *oid, int abbrev) |
3189 | { | |
3190 | if (startup_info->have_repository) | |
3191 | return find_unique_abbrev(oid->hash, abbrev); | |
3192 | else { | |
3193 | char *hex = oid_to_hex(oid); | |
0d9c527d JH |
3194 | if (abbrev < 0) |
3195 | abbrev = FALLBACK_DEFAULT_ABBREV; | |
3196 | if (abbrev > GIT_SHA1_HEXSZ) | |
4f03666a | 3197 | die("BUG: oid abbreviation out of range: %d", abbrev); |
43d1948b JB |
3198 | if (abbrev) |
3199 | hex[abbrev] = '\0'; | |
4f03666a JK |
3200 | return hex; |
3201 | } | |
3202 | } | |
3203 | ||
b67b9612 JH |
3204 | static void fill_metainfo(struct strbuf *msg, |
3205 | const char *name, | |
3206 | const char *other, | |
3207 | struct diff_filespec *one, | |
3208 | struct diff_filespec *two, | |
3209 | struct diff_options *o, | |
37466447 | 3210 | struct diff_filepair *p, |
5977744d | 3211 | int *must_show_header, |
37466447 | 3212 | int use_color) |
b67b9612 | 3213 | { |
37466447 BW |
3214 | const char *set = diff_get_color(use_color, DIFF_METAINFO); |
3215 | const char *reset = diff_get_color(use_color, DIFF_RESET); | |
30997bb8 | 3216 | const char *line_prefix = diff_line_prefix(o); |
7be57610 | 3217 | |
296c6bb2 | 3218 | *must_show_header = 1; |
b67b9612 JH |
3219 | strbuf_init(msg, PATH_MAX * 2 + 300); |
3220 | switch (p->status) { | |
3221 | case DIFF_STATUS_COPIED: | |
98ad90fb JH |
3222 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
3223 | line_prefix, set, similarity_index(p)); | |
3224 | strbuf_addf(msg, "%s\n%s%scopy from ", | |
3225 | reset, line_prefix, set); | |
b67b9612 | 3226 | quote_c_style(name, msg, NULL, 0); |
98ad90fb | 3227 | strbuf_addf(msg, "%s\n%s%scopy to ", reset, line_prefix, set); |
b67b9612 | 3228 | quote_c_style(other, msg, NULL, 0); |
37466447 | 3229 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
3230 | break; |
3231 | case DIFF_STATUS_RENAMED: | |
98ad90fb JH |
3232 | strbuf_addf(msg, "%s%ssimilarity index %d%%", |
3233 | line_prefix, set, similarity_index(p)); | |
3234 | strbuf_addf(msg, "%s\n%s%srename from ", | |
3235 | reset, line_prefix, set); | |
b67b9612 | 3236 | quote_c_style(name, msg, NULL, 0); |
98ad90fb JH |
3237 | strbuf_addf(msg, "%s\n%s%srename to ", |
3238 | reset, line_prefix, set); | |
b67b9612 | 3239 | quote_c_style(other, msg, NULL, 0); |
37466447 | 3240 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 JH |
3241 | break; |
3242 | case DIFF_STATUS_MODIFIED: | |
3243 | if (p->score) { | |
98ad90fb JH |
3244 | strbuf_addf(msg, "%s%sdissimilarity index %d%%%s\n", |
3245 | line_prefix, | |
37466447 | 3246 | set, similarity_index(p), reset); |
b67b9612 JH |
3247 | break; |
3248 | } | |
3249 | /* fallthru */ | |
3250 | default: | |
296c6bb2 | 3251 | *must_show_header = 0; |
b67b9612 | 3252 | } |
a0d12c44 | 3253 | if (one && two && oidcmp(&one->oid, &two->oid)) { |
b67b9612 JH |
3254 | int abbrev = DIFF_OPT_TST(o, FULL_INDEX) ? 40 : DEFAULT_ABBREV; |
3255 | ||
3256 | if (DIFF_OPT_TST(o, BINARY)) { | |
3257 | mmfile_t mf; | |
3258 | if ((!fill_mmfile(&mf, one) && diff_filespec_is_binary(one)) || | |
3259 | (!fill_mmfile(&mf, two) && diff_filespec_is_binary(two))) | |
3260 | abbrev = 40; | |
3261 | } | |
4f03666a JK |
3262 | strbuf_addf(msg, "%s%sindex %s..%s", line_prefix, set, |
3263 | diff_abbrev_oid(&one->oid, abbrev), | |
3264 | diff_abbrev_oid(&two->oid, abbrev)); | |
b67b9612 JH |
3265 | if (one->mode == two->mode) |
3266 | strbuf_addf(msg, " %06o", one->mode); | |
37466447 | 3267 | strbuf_addf(msg, "%s\n", reset); |
b67b9612 | 3268 | } |
b67b9612 JH |
3269 | } |
3270 | ||
6973dcae JH |
3271 | static void run_diff_cmd(const char *pgm, |
3272 | const char *name, | |
3273 | const char *other, | |
cd676a51 | 3274 | const char *attr_path, |
6973dcae JH |
3275 | struct diff_filespec *one, |
3276 | struct diff_filespec *two, | |
b67b9612 | 3277 | struct strbuf *msg, |
051308f6 | 3278 | struct diff_options *o, |
b67b9612 | 3279 | struct diff_filepair *p) |
6973dcae | 3280 | { |
b67b9612 JH |
3281 | const char *xfrm_msg = NULL; |
3282 | int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score; | |
296c6bb2 | 3283 | int must_show_header = 0; |
b67b9612 | 3284 | |
bd8c1a9b JH |
3285 | |
3286 | if (DIFF_OPT_TST(o, ALLOW_EXTERNAL)) { | |
be58e70d JK |
3287 | struct userdiff_driver *drv = userdiff_find_by_path(attr_path); |
3288 | if (drv && drv->external) | |
3289 | pgm = drv->external; | |
f1af60bd JH |
3290 | } |
3291 | ||
37466447 BW |
3292 | if (msg) { |
3293 | /* | |
3294 | * don't use colors when the header is intended for an | |
3295 | * external diff driver | |
3296 | */ | |
3297 | fill_metainfo(msg, name, other, one, two, o, p, | |
5977744d | 3298 | &must_show_header, |
daa0c3d9 | 3299 | want_color(o->use_color) && !pgm); |
37466447 BW |
3300 | xfrm_msg = msg->len ? msg->buf : NULL; |
3301 | } | |
3302 | ||
6973dcae JH |
3303 | if (pgm) { |
3304 | run_external_diff(pgm, name, other, one, two, xfrm_msg, | |
ee7fb0b1 | 3305 | complete_rewrite, o); |
6973dcae JH |
3306 | return; |
3307 | } | |
3308 | if (one && two) | |
3309 | builtin_diff(name, other ? other : name, | |
296c6bb2 CC |
3310 | one, two, xfrm_msg, must_show_header, |
3311 | o, complete_rewrite); | |
6973dcae | 3312 | else |
c0c77734 | 3313 | fprintf(o->file, "* Unmerged path %s\n", name); |
6973dcae JH |
3314 | } |
3315 | ||
94e327e9 | 3316 | static void diff_fill_oid_info(struct diff_filespec *one) |
6973dcae JH |
3317 | { |
3318 | if (DIFF_FILE_VALID(one)) { | |
41c9560e | 3319 | if (!one->oid_valid) { |
6973dcae | 3320 | struct stat st; |
4682d852 | 3321 | if (one->is_stdin) { |
a0d12c44 | 3322 | oidclr(&one->oid); |
5332b2af JS |
3323 | return; |
3324 | } | |
6973dcae | 3325 | if (lstat(one->path, &st) < 0) |
0721c314 | 3326 | die_errno("stat '%s'", one->path); |
a0d12c44 | 3327 | if (index_path(one->oid.hash, one->path, &st, 0)) |
d7530708 | 3328 | die("cannot hash %s", one->path); |
6973dcae JH |
3329 | } |
3330 | } | |
3331 | else | |
a0d12c44 | 3332 | oidclr(&one->oid); |
6973dcae JH |
3333 | } |
3334 | ||
cd676a51 JH |
3335 | static void strip_prefix(int prefix_length, const char **namep, const char **otherp) |
3336 | { | |
3337 | /* Strip the prefix but do not molest /dev/null and absolute paths */ | |
d8faea9d | 3338 | if (*namep && **namep != '/') { |
cd676a51 | 3339 | *namep += prefix_length; |
d8faea9d JN |
3340 | if (**namep == '/') |
3341 | ++*namep; | |
3342 | } | |
3343 | if (*otherp && **otherp != '/') { | |
cd676a51 | 3344 | *otherp += prefix_length; |
d8faea9d JN |
3345 | if (**otherp == '/') |
3346 | ++*otherp; | |
3347 | } | |
cd676a51 JH |
3348 | } |
3349 | ||
6973dcae JH |
3350 | static void run_diff(struct diff_filepair *p, struct diff_options *o) |
3351 | { | |
3352 | const char *pgm = external_diff(); | |
663af342 | 3353 | struct strbuf msg; |
663af342 PH |
3354 | struct diff_filespec *one = p->one; |
3355 | struct diff_filespec *two = p->two; | |
6973dcae JH |
3356 | const char *name; |
3357 | const char *other; | |
cd676a51 | 3358 | const char *attr_path; |
663af342 | 3359 | |
f2d2a5de SB |
3360 | name = one->path; |
3361 | other = (strcmp(name, two->path) ? two->path : NULL); | |
cd676a51 JH |
3362 | attr_path = name; |
3363 | if (o->prefix_length) | |
3364 | strip_prefix(o->prefix_length, &name, &other); | |
6973dcae | 3365 | |
bd8c1a9b JH |
3366 | if (!DIFF_OPT_TST(o, ALLOW_EXTERNAL)) |
3367 | pgm = NULL; | |
3368 | ||
6973dcae | 3369 | if (DIFF_PAIR_UNMERGED(p)) { |
cd676a51 | 3370 | run_diff_cmd(pgm, name, NULL, attr_path, |
b67b9612 | 3371 | NULL, NULL, NULL, o, p); |
6973dcae JH |
3372 | return; |
3373 | } | |
3374 | ||
94e327e9 BW |
3375 | diff_fill_oid_info(one); |
3376 | diff_fill_oid_info(two); | |
6973dcae | 3377 | |
6973dcae JH |
3378 | if (!pgm && |
3379 | DIFF_FILE_VALID(one) && DIFF_FILE_VALID(two) && | |
3380 | (S_IFMT & one->mode) != (S_IFMT & two->mode)) { | |
b67b9612 JH |
3381 | /* |
3382 | * a filepair that changes between file and symlink | |
6973dcae JH |
3383 | * needs to be split into deletion and creation. |
3384 | */ | |
3385 | struct diff_filespec *null = alloc_filespec(two->path); | |
cd676a51 | 3386 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 3387 | one, null, &msg, o, p); |
6973dcae | 3388 | free(null); |
b67b9612 JH |
3389 | strbuf_release(&msg); |
3390 | ||
6973dcae | 3391 | null = alloc_filespec(one->path); |
cd676a51 | 3392 | run_diff_cmd(NULL, name, other, attr_path, |
b67b9612 | 3393 | null, two, &msg, o, p); |
6973dcae JH |
3394 | free(null); |
3395 | } | |
3396 | else | |
cd676a51 | 3397 | run_diff_cmd(pgm, name, other, attr_path, |
b67b9612 | 3398 | one, two, &msg, o, p); |
6973dcae | 3399 | |
663af342 | 3400 | strbuf_release(&msg); |
6973dcae JH |
3401 | } |
3402 | ||
3403 | static void run_diffstat(struct diff_filepair *p, struct diff_options *o, | |
3404 | struct diffstat_t *diffstat) | |
3405 | { | |
3406 | const char *name; | |
3407 | const char *other; | |
3408 | ||
3409 | if (DIFF_PAIR_UNMERGED(p)) { | |
3410 | /* unmerged */ | |
74faaa16 | 3411 | builtin_diffstat(p->one->path, NULL, NULL, NULL, diffstat, o, p); |
6973dcae JH |
3412 | return; |
3413 | } | |
3414 | ||
3415 | name = p->one->path; | |
3416 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
3417 | ||
cd676a51 JH |
3418 | if (o->prefix_length) |
3419 | strip_prefix(o->prefix_length, &name, &other); | |
3420 | ||
94e327e9 BW |
3421 | diff_fill_oid_info(p->one); |
3422 | diff_fill_oid_info(p->two); | |
6973dcae | 3423 | |
74faaa16 | 3424 | builtin_diffstat(name, other, p->one, p->two, diffstat, o, p); |
6973dcae JH |
3425 | } |
3426 | ||
88246898 JS |
3427 | static void run_checkdiff(struct diff_filepair *p, struct diff_options *o) |
3428 | { | |
3429 | const char *name; | |
3430 | const char *other; | |
cd676a51 | 3431 | const char *attr_path; |
88246898 JS |
3432 | |
3433 | if (DIFF_PAIR_UNMERGED(p)) { | |
3434 | /* unmerged */ | |
3435 | return; | |
3436 | } | |
3437 | ||
3438 | name = p->one->path; | |
3439 | other = (strcmp(name, p->two->path) ? p->two->path : NULL); | |
cd676a51 JH |
3440 | attr_path = other ? other : name; |
3441 | ||
3442 | if (o->prefix_length) | |
3443 | strip_prefix(o->prefix_length, &name, &other); | |
88246898 | 3444 | |
94e327e9 BW |
3445 | diff_fill_oid_info(p->one); |
3446 | diff_fill_oid_info(p->two); | |
88246898 | 3447 | |
cd676a51 | 3448 | builtin_checkdiff(name, other, attr_path, p->one, p->two, o); |
88246898 JS |
3449 | } |
3450 | ||
6973dcae JH |
3451 | void diff_setup(struct diff_options *options) |
3452 | { | |
be4f2b40 | 3453 | memcpy(options, &default_diff_options, sizeof(*options)); |
c0c77734 DB |
3454 | |
3455 | options->file = stdout; | |
3456 | ||
43d1948b | 3457 | options->abbrev = DEFAULT_ABBREV; |
6973dcae JH |
3458 | options->line_termination = '\n'; |
3459 | options->break_opt = -1; | |
3460 | options->rename_limit = -1; | |
712d2c7d | 3461 | options->dirstat_permille = diff_dirstat_permille_default; |
6468a4e5 | 3462 | options->context = diff_context_default; |
c4888677 | 3463 | options->interhunkcontext = diff_interhunk_context_default; |
a17505f2 | 3464 | options->ws_error_highlight = ws_error_highlight_default; |
90d43b07 | 3465 | DIFF_OPT_SET(options, RENAME_EMPTY); |
6973dcae | 3466 | |
72441af7 | 3467 | /* pathchange left =NULL by default */ |
6973dcae JH |
3468 | options->change = diff_change; |
3469 | options->add_remove = diff_addremove; | |
f1c96261 | 3470 | options->use_color = diff_use_color_default; |
b68ea12e | 3471 | options->detect_rename = diff_detect_rename_default; |
07ab4dec | 3472 | options->xdl_opts |= diff_algorithm; |
433860f3 MH |
3473 | if (diff_indent_heuristic) |
3474 | DIFF_XDL_SET(options, INDENT_HEURISTIC); | |
eab9a40b | 3475 | |
6d8940b5 SB |
3476 | options->orderfile = diff_order_file_cfg; |
3477 | ||
f89504dd EC |
3478 | if (diff_no_prefix) { |
3479 | options->a_prefix = options->b_prefix = ""; | |
3480 | } else if (!diff_mnemonic_prefix) { | |
a5a818ee JH |
3481 | options->a_prefix = "a/"; |
3482 | options->b_prefix = "b/"; | |
3483 | } | |
6973dcae JH |
3484 | } |
3485 | ||
28452655 | 3486 | void diff_setup_done(struct diff_options *options) |
6973dcae | 3487 | { |
d7de00f7 TH |
3488 | int count = 0; |
3489 | ||
6c374008 JH |
3490 | if (options->set_default) |
3491 | options->set_default(options); | |
3492 | ||
d7de00f7 TH |
3493 | if (options->output_format & DIFF_FORMAT_NAME) |
3494 | count++; | |
3495 | if (options->output_format & DIFF_FORMAT_NAME_STATUS) | |
3496 | count++; | |
3497 | if (options->output_format & DIFF_FORMAT_CHECKDIFF) | |
3498 | count++; | |
3499 | if (options->output_format & DIFF_FORMAT_NO_OUTPUT) | |
3500 | count++; | |
3501 | if (count > 1) | |
a2f05c94 | 3502 | die(_("--name-only, --name-status, --check and -s are mutually exclusive")); |
d7de00f7 | 3503 | |
f245194f JH |
3504 | /* |
3505 | * Most of the time we can say "there are changes" | |
3506 | * only by checking if there are changed paths, but | |
3507 | * --ignore-whitespace* options force us to look | |
97bf2a08 | 3508 | * inside contents. |
f245194f JH |
3509 | */ |
3510 | ||
3511 | if (DIFF_XDL_TST(options, IGNORE_WHITESPACE) || | |
3512 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_CHANGE) || | |
3513 | DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL)) | |
3514 | DIFF_OPT_SET(options, DIFF_FROM_CONTENTS); | |
3515 | else | |
3516 | DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS); | |
3517 | ||
8f67f8ae | 3518 | if (DIFF_OPT_TST(options, FIND_COPIES_HARDER)) |
03b9d560 JH |
3519 | options->detect_rename = DIFF_DETECT_COPY; |
3520 | ||
cd676a51 JH |
3521 | if (!DIFF_OPT_TST(options, RELATIVE_NAME)) |
3522 | options->prefix = NULL; | |
3523 | if (options->prefix) | |
3524 | options->prefix_length = strlen(options->prefix); | |
3525 | else | |
3526 | options->prefix_length = 0; | |
3527 | ||
c6744349 TH |
3528 | if (options->output_format & (DIFF_FORMAT_NAME | |
3529 | DIFF_FORMAT_NAME_STATUS | | |
3530 | DIFF_FORMAT_CHECKDIFF | | |
3531 | DIFF_FORMAT_NO_OUTPUT)) | |
3532 | options->output_format &= ~(DIFF_FORMAT_RAW | | |
74e2abe5 | 3533 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3534 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3535 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3536 | DIFF_FORMAT_DIRSTAT | |
c6744349 TH |
3537 | DIFF_FORMAT_SUMMARY | |
3538 | DIFF_FORMAT_PATCH); | |
3539 | ||
6973dcae JH |
3540 | /* |
3541 | * These cases always need recursive; we do not drop caller-supplied | |
3542 | * recursive bits for other formats here. | |
3543 | */ | |
c6744349 | 3544 | if (options->output_format & (DIFF_FORMAT_PATCH | |
74e2abe5 | 3545 | DIFF_FORMAT_NUMSTAT | |
c6744349 | 3546 | DIFF_FORMAT_DIFFSTAT | |
ebd124c6 | 3547 | DIFF_FORMAT_SHORTSTAT | |
7df7c019 | 3548 | DIFF_FORMAT_DIRSTAT | |
d7014dc0 | 3549 | DIFF_FORMAT_SUMMARY | |
c6744349 | 3550 | DIFF_FORMAT_CHECKDIFF)) |
8f67f8ae | 3551 | DIFF_OPT_SET(options, RECURSIVE); |
5e363541 | 3552 | /* |
3969cf7d | 3553 | * Also pickaxe would not work very well if you do not say recursive |
5e363541 | 3554 | */ |
3969cf7d | 3555 | if (options->pickaxe) |
8f67f8ae | 3556 | DIFF_OPT_SET(options, RECURSIVE); |
ae6d5c1b JL |
3557 | /* |
3558 | * When patches are generated, submodules diffed against the work tree | |
3559 | * must be checked for dirtiness too so it can be shown in the output | |
3560 | */ | |
3561 | if (options->output_format & DIFF_FORMAT_PATCH) | |
3562 | DIFF_OPT_SET(options, DIRTY_SUBMODULES); | |
5e363541 | 3563 | |
6973dcae JH |
3564 | if (options->detect_rename && options->rename_limit < 0) |
3565 | options->rename_limit = diff_rename_limit_default; | |
3566 | if (options->setup & DIFF_SETUP_USE_CACHE) { | |
3567 | if (!active_cache) | |
3568 | /* read-cache does not die even when it fails | |
3569 | * so it is safe for us to do this here. Also | |
3570 | * it does not smudge active_cache or active_nr | |
3571 | * when it fails, so we do not have to worry about | |
3572 | * cleaning it up ourselves either. | |
3573 | */ | |
3574 | read_cache(); | |
3575 | } | |
7b5b7721 | 3576 | if (40 < options->abbrev) |
6973dcae JH |
3577 | options->abbrev = 40; /* full */ |
3578 | ||
68aacb2f JH |
3579 | /* |
3580 | * It does not make sense to show the first hit we happened | |
3581 | * to have found. It does not make sense not to return with | |
3582 | * exit code in such a case either. | |
3583 | */ | |
90b19941 | 3584 | if (DIFF_OPT_TST(options, QUICK)) { |
68aacb2f | 3585 | options->output_format = DIFF_FORMAT_NO_OUTPUT; |
8f67f8ae | 3586 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 3587 | } |
ee7fb0b1 | 3588 | |
0ea7d5b6 | 3589 | options->diff_path_counter = 0; |
b0e2c999 | 3590 | |
dd63f169 JK |
3591 | if (DIFF_OPT_TST(options, FOLLOW_RENAMES) && options->pathspec.nr != 1) |
3592 | die(_("--follow requires exactly one pathspec")); | |
6973dcae JH |
3593 | } |
3594 | ||
d2543b8e | 3595 | static int opt_arg(const char *arg, int arg_short, const char *arg_long, int *val) |
ee1e5412 LT |
3596 | { |
3597 | char c, *eq; | |
3598 | int len; | |
3599 | ||
3600 | if (*arg != '-') | |
3601 | return 0; | |
3602 | c = *++arg; | |
3603 | if (!c) | |
3604 | return 0; | |
3605 | if (c == arg_short) { | |
3606 | c = *++arg; | |
3607 | if (!c) | |
3608 | return 1; | |
3609 | if (val && isdigit(c)) { | |
3610 | char *end; | |
3611 | int n = strtoul(arg, &end, 10); | |
3612 | if (*end) | |
3613 | return 0; | |
3614 | *val = n; | |
3615 | return 1; | |
3616 | } | |
3617 | return 0; | |
3618 | } | |
3619 | if (c != '-') | |
3620 | return 0; | |
3621 | arg++; | |
2c5495f7 RM |
3622 | eq = strchrnul(arg, '='); |
3623 | len = eq - arg; | |
ee1e5412 LT |
3624 | if (!len || strncmp(arg, arg_long, len)) |
3625 | return 0; | |
2c5495f7 | 3626 | if (*eq) { |
ee1e5412 LT |
3627 | int n; |
3628 | char *end; | |
3629 | if (!isdigit(*++eq)) | |
3630 | return 0; | |
3631 | n = strtoul(eq, &end, 10); | |
3632 | if (*end) | |
3633 | return 0; | |
3634 | *val = n; | |
3635 | } | |
3636 | return 1; | |
3637 | } | |
3638 | ||
16befb8b JH |
3639 | static int diff_scoreopt_parse(const char *opt); |
3640 | ||
dea007fb MM |
3641 | static inline int short_opt(char opt, const char **argv, |
3642 | const char **optarg) | |
3643 | { | |
3644 | const char *arg = argv[0]; | |
3645 | if (arg[0] != '-' || arg[1] != opt) | |
3646 | return 0; | |
3647 | if (arg[2] != '\0') { | |
3648 | *optarg = arg + 2; | |
3649 | return 1; | |
3650 | } | |
3651 | if (!argv[1]) | |
3652 | die("Option '%c' requires a value", opt); | |
3653 | *optarg = argv[1]; | |
3654 | return 2; | |
3655 | } | |
3656 | ||
3657 | int parse_long_opt(const char *opt, const char **argv, | |
3658 | const char **optarg) | |
3659 | { | |
3660 | const char *arg = argv[0]; | |
95b567c7 | 3661 | if (!skip_prefix(arg, "--", &arg)) |
dea007fb | 3662 | return 0; |
95b567c7 | 3663 | if (!skip_prefix(arg, opt, &arg)) |
dea007fb | 3664 | return 0; |
b0d12fc9 | 3665 | if (*arg == '=') { /* stuck form: --option=value */ |
dea007fb MM |
3666 | *optarg = arg + 1; |
3667 | return 1; | |
3668 | } | |
3669 | if (*arg != '\0') | |
3670 | return 0; | |
3671 | /* separate form: --option value */ | |
3672 | if (!argv[1]) | |
3673 | die("Option '--%s' requires a value", opt); | |
3674 | *optarg = argv[1]; | |
3675 | return 2; | |
3676 | } | |
3677 | ||
4d7f7a4a JN |
3678 | static int stat_opt(struct diff_options *options, const char **av) |
3679 | { | |
3680 | const char *arg = av[0]; | |
3681 | char *end; | |
3682 | int width = options->stat_width; | |
3683 | int name_width = options->stat_name_width; | |
969fe57b | 3684 | int graph_width = options->stat_graph_width; |
808e1db2 | 3685 | int count = options->stat_count; |
1e57208e | 3686 | int argcount = 1; |
4d7f7a4a | 3687 | |
0539cc00 JK |
3688 | if (!skip_prefix(arg, "--stat", &arg)) |
3689 | die("BUG: stat option does not begin with --stat: %s", arg); | |
4d7f7a4a JN |
3690 | end = (char *)arg; |
3691 | ||
3692 | switch (*arg) { | |
3693 | case '-': | |
95b567c7 | 3694 | if (skip_prefix(arg, "-width", &arg)) { |
1e57208e MM |
3695 | if (*arg == '=') |
3696 | width = strtoul(arg + 1, &end, 10); | |
3697 | else if (!*arg && !av[1]) | |
a2f05c94 | 3698 | die_want_option("--stat-width"); |
1e57208e MM |
3699 | else if (!*arg) { |
3700 | width = strtoul(av[1], &end, 10); | |
3701 | argcount = 2; | |
3702 | } | |
95b567c7 | 3703 | } else if (skip_prefix(arg, "-name-width", &arg)) { |
1e57208e MM |
3704 | if (*arg == '=') |
3705 | name_width = strtoul(arg + 1, &end, 10); | |
3706 | else if (!*arg && !av[1]) | |
a2f05c94 | 3707 | die_want_option("--stat-name-width"); |
1e57208e MM |
3708 | else if (!*arg) { |
3709 | name_width = strtoul(av[1], &end, 10); | |
3710 | argcount = 2; | |
3711 | } | |
95b567c7 | 3712 | } else if (skip_prefix(arg, "-graph-width", &arg)) { |
969fe57b ZJS |
3713 | if (*arg == '=') |
3714 | graph_width = strtoul(arg + 1, &end, 10); | |
3715 | else if (!*arg && !av[1]) | |
a2f05c94 | 3716 | die_want_option("--stat-graph-width"); |
969fe57b ZJS |
3717 | else if (!*arg) { |
3718 | graph_width = strtoul(av[1], &end, 10); | |
3719 | argcount = 2; | |
3720 | } | |
95b567c7 | 3721 | } else if (skip_prefix(arg, "-count", &arg)) { |
808e1db2 MG |
3722 | if (*arg == '=') |
3723 | count = strtoul(arg + 1, &end, 10); | |
3724 | else if (!*arg && !av[1]) | |
a2f05c94 | 3725 | die_want_option("--stat-count"); |
808e1db2 MG |
3726 | else if (!*arg) { |
3727 | count = strtoul(av[1], &end, 10); | |
3728 | argcount = 2; | |
3729 | } | |
1e57208e | 3730 | } |
4d7f7a4a JN |
3731 | break; |
3732 | case '=': | |
3733 | width = strtoul(arg+1, &end, 10); | |
3734 | if (*end == ',') | |
3735 | name_width = strtoul(end+1, &end, 10); | |
808e1db2 MG |
3736 | if (*end == ',') |
3737 | count = strtoul(end+1, &end, 10); | |
4d7f7a4a JN |
3738 | } |
3739 | ||
3740 | /* Important! This checks all the error cases! */ | |
3741 | if (*end) | |
3742 | return 0; | |
3743 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3744 | options->stat_name_width = name_width; | |
969fe57b | 3745 | options->stat_graph_width = graph_width; |
4d7f7a4a | 3746 | options->stat_width = width; |
808e1db2 | 3747 | options->stat_count = count; |
1e57208e | 3748 | return argcount; |
4d7f7a4a JN |
3749 | } |
3750 | ||
333f3fb0 JH |
3751 | static int parse_dirstat_opt(struct diff_options *options, const char *params) |
3752 | { | |
51670fc8 JH |
3753 | struct strbuf errmsg = STRBUF_INIT; |
3754 | if (parse_dirstat_params(options, params, &errmsg)) | |
7478ac57 | 3755 | die(_("Failed to parse --dirstat/-X option parameter:\n%s"), |
51670fc8 JH |
3756 | errmsg.buf); |
3757 | strbuf_release(&errmsg); | |
333f3fb0 JH |
3758 | /* |
3759 | * The caller knows a dirstat-related option is given from the command | |
3760 | * line; allow it to say "return this_function();" | |
3761 | */ | |
3762 | options->output_format |= DIFF_FORMAT_DIRSTAT; | |
3763 | return 1; | |
3764 | } | |
3765 | ||
c47ef57c RR |
3766 | static int parse_submodule_opt(struct diff_options *options, const char *value) |
3767 | { | |
3768 | if (parse_submodule_params(options, value)) | |
3769 | die(_("Failed to parse --submodule option parameter: '%s'"), | |
3770 | value); | |
3771 | return 1; | |
3772 | } | |
3773 | ||
1ecc1cbd JH |
3774 | static const char diff_status_letters[] = { |
3775 | DIFF_STATUS_ADDED, | |
3776 | DIFF_STATUS_COPIED, | |
3777 | DIFF_STATUS_DELETED, | |
3778 | DIFF_STATUS_MODIFIED, | |
3779 | DIFF_STATUS_RENAMED, | |
3780 | DIFF_STATUS_TYPE_CHANGED, | |
3781 | DIFF_STATUS_UNKNOWN, | |
3782 | DIFF_STATUS_UNMERGED, | |
3783 | DIFF_STATUS_FILTER_AON, | |
3784 | DIFF_STATUS_FILTER_BROKEN, | |
3785 | '\0', | |
3786 | }; | |
3787 | ||
3788 | static unsigned int filter_bit['Z' + 1]; | |
3789 | ||
3790 | static void prepare_filter_bits(void) | |
3791 | { | |
3792 | int i; | |
3793 | ||
3794 | if (!filter_bit[DIFF_STATUS_ADDED]) { | |
3795 | for (i = 0; diff_status_letters[i]; i++) | |
3796 | filter_bit[(int) diff_status_letters[i]] = (1 << i); | |
3797 | } | |
3798 | } | |
3799 | ||
3800 | static unsigned filter_bit_tst(char status, const struct diff_options *opt) | |
3801 | { | |
3802 | return opt->filter & filter_bit[(int) status]; | |
3803 | } | |
3804 | ||
3805 | static int parse_diff_filter_opt(const char *optarg, struct diff_options *opt) | |
3806 | { | |
3807 | int i, optch; | |
3808 | ||
3809 | prepare_filter_bits(); | |
7f2ea5f0 JH |
3810 | |
3811 | /* | |
3812 | * If there is a negation e.g. 'd' in the input, and we haven't | |
3813 | * initialized the filter field with another --diff-filter, start | |
3814 | * from full set of bits, except for AON. | |
3815 | */ | |
3816 | if (!opt->filter) { | |
3817 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { | |
3818 | if (optch < 'a' || 'z' < optch) | |
3819 | continue; | |
3820 | opt->filter = (1 << (ARRAY_SIZE(diff_status_letters) - 1)) - 1; | |
3821 | opt->filter &= ~filter_bit[DIFF_STATUS_FILTER_AON]; | |
3822 | break; | |
3823 | } | |
3824 | } | |
3825 | ||
1ecc1cbd JH |
3826 | for (i = 0; (optch = optarg[i]) != '\0'; i++) { |
3827 | unsigned int bit; | |
7f2ea5f0 JH |
3828 | int negate; |
3829 | ||
3830 | if ('a' <= optch && optch <= 'z') { | |
3831 | negate = 1; | |
3832 | optch = toupper(optch); | |
3833 | } else { | |
3834 | negate = 0; | |
3835 | } | |
1ecc1cbd JH |
3836 | |
3837 | bit = (0 <= optch && optch <= 'Z') ? filter_bit[optch] : 0; | |
3838 | if (!bit) | |
bf142ec4 | 3839 | return optarg[i]; |
7f2ea5f0 JH |
3840 | if (negate) |
3841 | opt->filter &= ~bit; | |
3842 | else | |
3843 | opt->filter |= bit; | |
1ecc1cbd JH |
3844 | } |
3845 | return 0; | |
3846 | } | |
3847 | ||
71482d38 MM |
3848 | static void enable_patch_output(int *fmt) { |
3849 | *fmt &= ~DIFF_FORMAT_NO_OUTPUT; | |
3850 | *fmt |= DIFF_FORMAT_PATCH; | |
3851 | } | |
3852 | ||
077965f8 | 3853 | static int parse_ws_error_highlight_opt(struct diff_options *opt, const char *arg) |
b8767f79 | 3854 | { |
077965f8 | 3855 | int val = parse_ws_error_highlight(arg); |
b8767f79 | 3856 | |
077965f8 JH |
3857 | if (val < 0) { |
3858 | error("unknown value after ws-error-highlight=%.*s", | |
3859 | -1 - val, arg); | |
3860 | return 0; | |
b8767f79 JH |
3861 | } |
3862 | opt->ws_error_highlight = val; | |
3863 | return 1; | |
3864 | } | |
3865 | ||
a97262c6 NTND |
3866 | int diff_opt_parse(struct diff_options *options, |
3867 | const char **av, int ac, const char *prefix) | |
6973dcae JH |
3868 | { |
3869 | const char *arg = av[0]; | |
dea007fb MM |
3870 | const char *optarg; |
3871 | int argcount; | |
d054680c | 3872 | |
a97262c6 NTND |
3873 | if (!prefix) |
3874 | prefix = ""; | |
3875 | ||
d054680c | 3876 | /* Output format options */ |
71482d38 MM |
3877 | if (!strcmp(arg, "-p") || !strcmp(arg, "-u") || !strcmp(arg, "--patch") |
3878 | || opt_arg(arg, 'U', "unified", &options->context)) | |
3879 | enable_patch_output(&options->output_format); | |
a610786f TH |
3880 | else if (!strcmp(arg, "--raw")) |
3881 | options->output_format |= DIFF_FORMAT_RAW; | |
71482d38 MM |
3882 | else if (!strcmp(arg, "--patch-with-raw")) { |
3883 | enable_patch_output(&options->output_format); | |
3884 | options->output_format |= DIFF_FORMAT_RAW; | |
3885 | } else if (!strcmp(arg, "--numstat")) | |
74e2abe5 | 3886 | options->output_format |= DIFF_FORMAT_NUMSTAT; |
8f67f8ae | 3887 | else if (!strcmp(arg, "--shortstat")) |
ebd124c6 | 3888 | options->output_format |= DIFF_FORMAT_SHORTSTAT; |
333f3fb0 JH |
3889 | else if (!strcmp(arg, "-X") || !strcmp(arg, "--dirstat")) |
3890 | return parse_dirstat_opt(options, ""); | |
ae021d87 JK |
3891 | else if (skip_prefix(arg, "-X", &arg)) |
3892 | return parse_dirstat_opt(options, arg); | |
3893 | else if (skip_prefix(arg, "--dirstat=", &arg)) | |
3894 | return parse_dirstat_opt(options, arg); | |
333f3fb0 JH |
3895 | else if (!strcmp(arg, "--cumulative")) |
3896 | return parse_dirstat_opt(options, "cumulative"); | |
3897 | else if (!strcmp(arg, "--dirstat-by-file")) | |
3898 | return parse_dirstat_opt(options, "files"); | |
ae021d87 | 3899 | else if (skip_prefix(arg, "--dirstat-by-file=", &arg)) { |
333f3fb0 | 3900 | parse_dirstat_opt(options, "files"); |
ae021d87 | 3901 | return parse_dirstat_opt(options, arg); |
f88d225f | 3902 | } |
d054680c PH |
3903 | else if (!strcmp(arg, "--check")) |
3904 | options->output_format |= DIFF_FORMAT_CHECKDIFF; | |
3905 | else if (!strcmp(arg, "--summary")) | |
3906 | options->output_format |= DIFF_FORMAT_SUMMARY; | |
71482d38 MM |
3907 | else if (!strcmp(arg, "--patch-with-stat")) { |
3908 | enable_patch_output(&options->output_format); | |
3909 | options->output_format |= DIFF_FORMAT_DIFFSTAT; | |
3910 | } else if (!strcmp(arg, "--name-only")) | |
d054680c PH |
3911 | options->output_format |= DIFF_FORMAT_NAME; |
3912 | else if (!strcmp(arg, "--name-status")) | |
3913 | options->output_format |= DIFF_FORMAT_NAME_STATUS; | |
d09cd15d | 3914 | else if (!strcmp(arg, "-s") || !strcmp(arg, "--no-patch")) |
d054680c | 3915 | options->output_format |= DIFF_FORMAT_NO_OUTPUT; |
59556548 | 3916 | else if (starts_with(arg, "--stat")) |
808e1db2 | 3917 | /* --stat, --stat-width, --stat-name-width, or --stat-count */ |
4d7f7a4a | 3918 | return stat_opt(options, av); |
d054680c PH |
3919 | |
3920 | /* renames options */ | |
59556548 | 3921 | else if (starts_with(arg, "-B") || starts_with(arg, "--break-rewrites=") || |
37ab5156 | 3922 | !strcmp(arg, "--break-rewrites")) { |
8f67f8ae | 3923 | if ((options->break_opt = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3924 | return error("invalid argument to -B: %s", arg+2); |
6973dcae | 3925 | } |
59556548 | 3926 | else if (starts_with(arg, "-M") || starts_with(arg, "--find-renames=") || |
f611ddc7 | 3927 | !strcmp(arg, "--find-renames")) { |
8f67f8ae | 3928 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) |
07cd7265 | 3929 | return error("invalid argument to -M: %s", arg+2); |
6973dcae JH |
3930 | options->detect_rename = DIFF_DETECT_RENAME; |
3931 | } | |
467ddc14 JH |
3932 | else if (!strcmp(arg, "-D") || !strcmp(arg, "--irreversible-delete")) { |
3933 | options->irreversible_delete = 1; | |
3934 | } | |
59556548 | 3935 | else if (starts_with(arg, "-C") || starts_with(arg, "--find-copies=") || |
f611ddc7 | 3936 | !strcmp(arg, "--find-copies")) { |
ca6c0970 | 3937 | if (options->detect_rename == DIFF_DETECT_COPY) |
8f67f8ae PH |
3938 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
3939 | if ((options->rename_score = diff_scoreopt_parse(arg)) == -1) | |
07cd7265 | 3940 | return error("invalid argument to -C: %s", arg+2); |
6973dcae JH |
3941 | options->detect_rename = DIFF_DETECT_COPY; |
3942 | } | |
d054680c PH |
3943 | else if (!strcmp(arg, "--no-renames")) |
3944 | options->detect_rename = 0; | |
90d43b07 JK |
3945 | else if (!strcmp(arg, "--rename-empty")) |
3946 | DIFF_OPT_SET(options, RENAME_EMPTY); | |
3947 | else if (!strcmp(arg, "--no-rename-empty")) | |
3948 | DIFF_OPT_CLR(options, RENAME_EMPTY); | |
cd676a51 JH |
3949 | else if (!strcmp(arg, "--relative")) |
3950 | DIFF_OPT_SET(options, RELATIVE_NAME); | |
ae021d87 | 3951 | else if (skip_prefix(arg, "--relative=", &arg)) { |
c0cb4a06 | 3952 | DIFF_OPT_SET(options, RELATIVE_NAME); |
ae021d87 | 3953 | options->prefix = arg; |
c0cb4a06 | 3954 | } |
d054680c PH |
3955 | |
3956 | /* xdiff options */ | |
81b568c8 JH |
3957 | else if (!strcmp(arg, "--minimal")) |
3958 | DIFF_XDL_SET(options, NEED_MINIMAL); | |
3959 | else if (!strcmp(arg, "--no-minimal")) | |
3960 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
d054680c | 3961 | else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space")) |
628d5c2b | 3962 | DIFF_XDL_SET(options, IGNORE_WHITESPACE); |
d054680c | 3963 | else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change")) |
628d5c2b | 3964 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE); |
d054680c | 3965 | else if (!strcmp(arg, "--ignore-space-at-eol")) |
628d5c2b | 3966 | DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL); |
36617af7 AP |
3967 | else if (!strcmp(arg, "--ignore-blank-lines")) |
3968 | DIFF_XDL_SET(options, IGNORE_BLANK_LINES); | |
3cde4e02 | 3969 | else if (!strcmp(arg, "--indent-heuristic")) |
433860f3 | 3970 | DIFF_XDL_SET(options, INDENT_HEURISTIC); |
3cde4e02 | 3971 | else if (!strcmp(arg, "--no-indent-heuristic")) |
433860f3 | 3972 | DIFF_XDL_CLR(options, INDENT_HEURISTIC); |
34292bdd | 3973 | else if (!strcmp(arg, "--patience")) |
307ab20b | 3974 | options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF); |
8c912eea | 3975 | else if (!strcmp(arg, "--histogram")) |
307ab20b | 3976 | options->xdl_opts = DIFF_WITH_ALG(options, HISTOGRAM_DIFF); |
0895c6d4 JK |
3977 | else if ((argcount = parse_long_opt("diff-algorithm", av, &optarg))) { |
3978 | long value = parse_algorithm_value(optarg); | |
07924d4d MP |
3979 | if (value < 0) |
3980 | return error("option diff-algorithm accepts \"myers\", " | |
3981 | "\"minimal\", \"patience\" and \"histogram\""); | |
3982 | /* clear out previous settings */ | |
3983 | DIFF_XDL_CLR(options, NEED_MINIMAL); | |
3984 | options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK; | |
3985 | options->xdl_opts |= value; | |
0895c6d4 | 3986 | return argcount; |
07924d4d | 3987 | } |
d054680c PH |
3988 | |
3989 | /* flags options */ | |
3990 | else if (!strcmp(arg, "--binary")) { | |
71482d38 | 3991 | enable_patch_output(&options->output_format); |
d054680c PH |
3992 | DIFF_OPT_SET(options, BINARY); |
3993 | } | |
3994 | else if (!strcmp(arg, "--full-index")) | |
3995 | DIFF_OPT_SET(options, FULL_INDEX); | |
3996 | else if (!strcmp(arg, "-a") || !strcmp(arg, "--text")) | |
3997 | DIFF_OPT_SET(options, TEXT); | |
3998 | else if (!strcmp(arg, "-R")) | |
3999 | DIFF_OPT_SET(options, REVERSE_DIFF); | |
6973dcae | 4000 | else if (!strcmp(arg, "--find-copies-harder")) |
8f67f8ae | 4001 | DIFF_OPT_SET(options, FIND_COPIES_HARDER); |
750f7b66 | 4002 | else if (!strcmp(arg, "--follow")) |
8f67f8ae | 4003 | DIFF_OPT_SET(options, FOLLOW_RENAMES); |
076c9837 | 4004 | else if (!strcmp(arg, "--no-follow")) { |
aebbcf57 | 4005 | DIFF_OPT_CLR(options, FOLLOW_RENAMES); |
076c9837 DT |
4006 | DIFF_OPT_CLR(options, DEFAULT_FOLLOW_RENAMES); |
4007 | } else if (!strcmp(arg, "--color")) | |
f1c96261 | 4008 | options->use_color = 1; |
ae021d87 JK |
4009 | else if (skip_prefix(arg, "--color=", &arg)) { |
4010 | int value = git_config_colorbool(NULL, arg); | |
daa0c3d9 | 4011 | if (value < 0) |
73e9da01 | 4012 | return error("option `color' expects \"always\", \"auto\", or \"never\""); |
daa0c3d9 | 4013 | options->use_color = value; |
73e9da01 | 4014 | } |
fef88bb0 | 4015 | else if (!strcmp(arg, "--no-color")) |
f1c96261 | 4016 | options->use_color = 0; |
628d5c2b | 4017 | else if (!strcmp(arg, "--color-words")) { |
f1c96261 | 4018 | options->use_color = 1; |
882749a0 | 4019 | options->word_diff = DIFF_WORDS_COLOR; |
628d5c2b | 4020 | } |
ae021d87 | 4021 | else if (skip_prefix(arg, "--color-words=", &arg)) { |
f1c96261 | 4022 | options->use_color = 1; |
882749a0 | 4023 | options->word_diff = DIFF_WORDS_COLOR; |
ae021d87 | 4024 | options->word_regex = arg; |
2b6a5417 | 4025 | } |
882749a0 TR |
4026 | else if (!strcmp(arg, "--word-diff")) { |
4027 | if (options->word_diff == DIFF_WORDS_NONE) | |
4028 | options->word_diff = DIFF_WORDS_PLAIN; | |
4029 | } | |
ae021d87 JK |
4030 | else if (skip_prefix(arg, "--word-diff=", &arg)) { |
4031 | if (!strcmp(arg, "plain")) | |
882749a0 | 4032 | options->word_diff = DIFF_WORDS_PLAIN; |
ae021d87 | 4033 | else if (!strcmp(arg, "color")) { |
f1c96261 | 4034 | options->use_color = 1; |
882749a0 TR |
4035 | options->word_diff = DIFF_WORDS_COLOR; |
4036 | } | |
ae021d87 | 4037 | else if (!strcmp(arg, "porcelain")) |
882749a0 | 4038 | options->word_diff = DIFF_WORDS_PORCELAIN; |
ae021d87 | 4039 | else if (!strcmp(arg, "none")) |
882749a0 TR |
4040 | options->word_diff = DIFF_WORDS_NONE; |
4041 | else | |
ae021d87 | 4042 | die("bad --word-diff argument: %s", arg); |
882749a0 | 4043 | } |
dea007fb | 4044 | else if ((argcount = parse_long_opt("word-diff-regex", av, &optarg))) { |
882749a0 TR |
4045 | if (options->word_diff == DIFF_WORDS_NONE) |
4046 | options->word_diff = DIFF_WORDS_PLAIN; | |
dea007fb MM |
4047 | options->word_regex = optarg; |
4048 | return argcount; | |
882749a0 | 4049 | } |
41bbf9d5 | 4050 | else if (!strcmp(arg, "--exit-code")) |
8f67f8ae | 4051 | DIFF_OPT_SET(options, EXIT_WITH_STATUS); |
68aacb2f | 4052 | else if (!strcmp(arg, "--quiet")) |
90b19941 | 4053 | DIFF_OPT_SET(options, QUICK); |
72909bef | 4054 | else if (!strcmp(arg, "--ext-diff")) |
8f67f8ae | 4055 | DIFF_OPT_SET(options, ALLOW_EXTERNAL); |
72909bef | 4056 | else if (!strcmp(arg, "--no-ext-diff")) |
8f67f8ae | 4057 | DIFF_OPT_CLR(options, ALLOW_EXTERNAL); |
e10ea812 JK |
4058 | else if (!strcmp(arg, "--textconv")) |
4059 | DIFF_OPT_SET(options, ALLOW_TEXTCONV); | |
4060 | else if (!strcmp(arg, "--no-textconv")) | |
4061 | DIFF_OPT_CLR(options, ALLOW_TEXTCONV); | |
aee9c7d6 JL |
4062 | else if (!strcmp(arg, "--ignore-submodules")) { |
4063 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); | |
46a958b3 | 4064 | handle_ignore_submodules_arg(options, "all"); |
ae021d87 | 4065 | } else if (skip_prefix(arg, "--ignore-submodules=", &arg)) { |
aee9c7d6 | 4066 | DIFF_OPT_SET(options, OVERRIDE_SUBMODULE_CONFIG); |
ae021d87 | 4067 | handle_ignore_submodules_arg(options, arg); |
aee9c7d6 | 4068 | } else if (!strcmp(arg, "--submodule")) |
61cfbc05 | 4069 | options->submodule_format = DIFF_SUBMODULE_LOG; |
ae021d87 JK |
4070 | else if (skip_prefix(arg, "--submodule=", &arg)) |
4071 | return parse_submodule_opt(options, arg); | |
b8767f79 | 4072 | else if (skip_prefix(arg, "--ws-error-highlight=", &arg)) |
077965f8 | 4073 | return parse_ws_error_highlight_opt(options, arg); |
b42b4519 NTND |
4074 | else if (!strcmp(arg, "--ita-invisible-in-index")) |
4075 | options->ita_invisible_in_index = 1; | |
4076 | else if (!strcmp(arg, "--ita-visible-in-index")) | |
4077 | options->ita_invisible_in_index = 0; | |
d054680c PH |
4078 | |
4079 | /* misc options */ | |
4080 | else if (!strcmp(arg, "-z")) | |
4081 | options->line_termination = 0; | |
dea007fb MM |
4082 | else if ((argcount = short_opt('l', av, &optarg))) { |
4083 | options->rename_limit = strtoul(optarg, NULL, 10); | |
4084 | return argcount; | |
4085 | } | |
4086 | else if ((argcount = short_opt('S', av, &optarg))) { | |
4087 | options->pickaxe = optarg; | |
f506b8e8 JH |
4088 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_S; |
4089 | return argcount; | |
4090 | } else if ((argcount = short_opt('G', av, &optarg))) { | |
4091 | options->pickaxe = optarg; | |
4092 | options->pickaxe_opts |= DIFF_PICKAXE_KIND_G; | |
dea007fb MM |
4093 | return argcount; |
4094 | } | |
d054680c | 4095 | else if (!strcmp(arg, "--pickaxe-all")) |
f506b8e8 | 4096 | options->pickaxe_opts |= DIFF_PICKAXE_ALL; |
d054680c | 4097 | else if (!strcmp(arg, "--pickaxe-regex")) |
f506b8e8 | 4098 | options->pickaxe_opts |= DIFF_PICKAXE_REGEX; |
dea007fb | 4099 | else if ((argcount = short_opt('O', av, &optarg))) { |
e4da43b1 | 4100 | options->orderfile = prefix_filename(prefix, optarg); |
dea007fb MM |
4101 | return argcount; |
4102 | } | |
4103 | else if ((argcount = parse_long_opt("diff-filter", av, &optarg))) { | |
1ecc1cbd JH |
4104 | int offending = parse_diff_filter_opt(optarg, options); |
4105 | if (offending) | |
4106 | die("unknown change class '%c' in --diff-filter=%s", | |
4107 | offending, optarg); | |
dea007fb MM |
4108 | return argcount; |
4109 | } | |
43d1948b JB |
4110 | else if (!strcmp(arg, "--no-abbrev")) |
4111 | options->abbrev = 0; | |
d054680c PH |
4112 | else if (!strcmp(arg, "--abbrev")) |
4113 | options->abbrev = DEFAULT_ABBREV; | |
ae021d87 JK |
4114 | else if (skip_prefix(arg, "--abbrev=", &arg)) { |
4115 | options->abbrev = strtoul(arg, NULL, 10); | |
d054680c PH |
4116 | if (options->abbrev < MINIMUM_ABBREV) |
4117 | options->abbrev = MINIMUM_ABBREV; | |
4118 | else if (40 < options->abbrev) | |
4119 | options->abbrev = 40; | |
4120 | } | |
dea007fb MM |
4121 | else if ((argcount = parse_long_opt("src-prefix", av, &optarg))) { |
4122 | options->a_prefix = optarg; | |
4123 | return argcount; | |
4124 | } | |
660e113c JK |
4125 | else if ((argcount = parse_long_opt("line-prefix", av, &optarg))) { |
4126 | options->line_prefix = optarg; | |
4127 | options->line_prefix_length = strlen(options->line_prefix); | |
4128 | graph_setup_line_prefix(options); | |
4129 | return argcount; | |
4130 | } | |
dea007fb MM |
4131 | else if ((argcount = parse_long_opt("dst-prefix", av, &optarg))) { |
4132 | options->b_prefix = optarg; | |
4133 | return argcount; | |
4134 | } | |
eab9a40b JS |
4135 | else if (!strcmp(arg, "--no-prefix")) |
4136 | options->a_prefix = options->b_prefix = ""; | |
6d0e674a RS |
4137 | else if (opt_arg(arg, '\0', "inter-hunk-context", |
4138 | &options->interhunkcontext)) | |
4139 | ; | |
14937c2c RS |
4140 | else if (!strcmp(arg, "-W")) |
4141 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
4142 | else if (!strcmp(arg, "--function-context")) | |
4143 | DIFF_OPT_SET(options, FUNCCONTEXT); | |
4144 | else if (!strcmp(arg, "--no-function-context")) | |
4145 | DIFF_OPT_CLR(options, FUNCCONTEXT); | |
dea007fb | 4146 | else if ((argcount = parse_long_opt("output", av, &optarg))) { |
e4da43b1 | 4147 | char *path = prefix_filename(prefix, optarg); |
23a9e071 | 4148 | options->file = xfopen(path, "w"); |
c0c77734 | 4149 | options->close_file = 1; |
afc676f2 JS |
4150 | if (options->use_color != GIT_COLOR_ALWAYS) |
4151 | options->use_color = GIT_COLOR_NEVER; | |
e4da43b1 | 4152 | free(path); |
dea007fb | 4153 | return argcount; |
c0c77734 | 4154 | } else |
6973dcae JH |
4155 | return 0; |
4156 | return 1; | |
4157 | } | |
4158 | ||
10ae7526 | 4159 | int parse_rename_score(const char **cp_p) |
6973dcae JH |
4160 | { |
4161 | unsigned long num, scale; | |
4162 | int ch, dot; | |
4163 | const char *cp = *cp_p; | |
4164 | ||
4165 | num = 0; | |
4166 | scale = 1; | |
4167 | dot = 0; | |
eeefa7c9 | 4168 | for (;;) { |
6973dcae JH |
4169 | ch = *cp; |
4170 | if ( !dot && ch == '.' ) { | |
4171 | scale = 1; | |
4172 | dot = 1; | |
4173 | } else if ( ch == '%' ) { | |
4174 | scale = dot ? scale*100 : 100; | |
4175 | cp++; /* % is always at the end */ | |
4176 | break; | |
4177 | } else if ( ch >= '0' && ch <= '9' ) { | |
4178 | if ( scale < 100000 ) { | |
4179 | scale *= 10; | |
4180 | num = (num*10) + (ch-'0'); | |
4181 | } | |
4182 | } else { | |
4183 | break; | |
4184 | } | |
4185 | cp++; | |
4186 | } | |
4187 | *cp_p = cp; | |
4188 | ||
4189 | /* user says num divided by scale and we say internally that | |
4190 | * is MAX_SCORE * num / scale. | |
4191 | */ | |
dc49cd76 | 4192 | return (int)((num >= scale) ? MAX_SCORE : (MAX_SCORE * num / scale)); |
6973dcae JH |
4193 | } |
4194 | ||
16befb8b | 4195 | static int diff_scoreopt_parse(const char *opt) |
6973dcae JH |
4196 | { |
4197 | int opt1, opt2, cmd; | |
4198 | ||
4199 | if (*opt++ != '-') | |
4200 | return -1; | |
4201 | cmd = *opt++; | |
37ab5156 KB |
4202 | if (cmd == '-') { |
4203 | /* convert the long-form arguments into short-form versions */ | |
95b567c7 | 4204 | if (skip_prefix(opt, "break-rewrites", &opt)) { |
37ab5156 KB |
4205 | if (*opt == 0 || *opt++ == '=') |
4206 | cmd = 'B'; | |
95b567c7 | 4207 | } else if (skip_prefix(opt, "find-copies", &opt)) { |
37ab5156 KB |
4208 | if (*opt == 0 || *opt++ == '=') |
4209 | cmd = 'C'; | |
95b567c7 | 4210 | } else if (skip_prefix(opt, "find-renames", &opt)) { |
37ab5156 KB |
4211 | if (*opt == 0 || *opt++ == '=') |
4212 | cmd = 'M'; | |
4213 | } | |
4214 | } | |
6973dcae | 4215 | if (cmd != 'M' && cmd != 'C' && cmd != 'B') |
01689909 | 4216 | return -1; /* that is not a -M, -C, or -B option */ |
6973dcae | 4217 | |
10ae7526 | 4218 | opt1 = parse_rename_score(&opt); |
6973dcae JH |
4219 | if (cmd != 'B') |
4220 | opt2 = 0; | |
4221 | else { | |
4222 | if (*opt == 0) | |
4223 | opt2 = 0; | |
4224 | else if (*opt != '/') | |
4225 | return -1; /* we expect -B80/99 or -B80 */ | |
4226 | else { | |
4227 | opt++; | |
10ae7526 | 4228 | opt2 = parse_rename_score(&opt); |
6973dcae JH |
4229 | } |
4230 | } | |
4231 | if (*opt != 0) | |
4232 | return -1; | |
4233 | return opt1 | (opt2 << 16); | |
4234 | } | |
4235 | ||
4236 | struct diff_queue_struct diff_queued_diff; | |
4237 | ||
4238 | void diff_q(struct diff_queue_struct *queue, struct diff_filepair *dp) | |
4239 | { | |
4c960a43 | 4240 | ALLOC_GROW(queue->queue, queue->nr + 1, queue->alloc); |
6973dcae JH |
4241 | queue->queue[queue->nr++] = dp; |
4242 | } | |
4243 | ||
4244 | struct diff_filepair *diff_queue(struct diff_queue_struct *queue, | |
4245 | struct diff_filespec *one, | |
4246 | struct diff_filespec *two) | |
4247 | { | |
ef677686 | 4248 | struct diff_filepair *dp = xcalloc(1, sizeof(*dp)); |
6973dcae JH |
4249 | dp->one = one; |
4250 | dp->two = two; | |
6973dcae JH |
4251 | if (queue) |
4252 | diff_q(queue, dp); | |
4253 | return dp; | |
4254 | } | |
4255 | ||
4256 | void diff_free_filepair(struct diff_filepair *p) | |
4257 | { | |
9fb88419 LT |
4258 | free_filespec(p->one); |
4259 | free_filespec(p->two); | |
6973dcae JH |
4260 | free(p); |
4261 | } | |
4262 | ||
d6cece51 | 4263 | const char *diff_aligned_abbrev(const struct object_id *oid, int len) |
6973dcae JH |
4264 | { |
4265 | int abblen; | |
4266 | const char *abbrev; | |
6973dcae | 4267 | |
d6cece51 JK |
4268 | if (len == GIT_SHA1_HEXSZ) |
4269 | return oid_to_hex(oid); | |
4270 | ||
4f03666a | 4271 | abbrev = diff_abbrev_oid(oid, len); |
6973dcae | 4272 | abblen = strlen(abbrev); |
d709f1fb JH |
4273 | |
4274 | /* | |
4275 | * In well-behaved cases, where the abbbreviated result is the | |
4276 | * same as the requested length, append three dots after the | |
4277 | * abbreviation (hence the whole logic is limited to the case | |
4278 | * where abblen < 37); when the actual abbreviated result is a | |
4279 | * bit longer than the requested length, we reduce the number | |
4280 | * of dots so that they match the well-behaved ones. However, | |
4281 | * if the actual abbreviation is longer than the requested | |
4282 | * length by more than three, we give up on aligning, and add | |
4283 | * three dots anyway, to indicate that the output is not the | |
4284 | * full object name. Yes, this may be suboptimal, but this | |
4285 | * appears only in "diff --raw --abbrev" output and it is not | |
4286 | * worth the effort to change it now. Note that this would | |
4287 | * likely to work fine when the automatic sizing of default | |
4288 | * abbreviation length is used--we would be fed -1 in "len" in | |
4289 | * that case, and will end up always appending three-dots, but | |
4290 | * the automatic sizing is supposed to give abblen that ensures | |
4291 | * uniqueness across all objects (statistically speaking). | |
4292 | */ | |
d6cece51 | 4293 | if (abblen < GIT_SHA1_HEXSZ - 3) { |
dc01505f | 4294 | static char hex[GIT_MAX_HEXSZ + 1]; |
6973dcae | 4295 | if (len < abblen && abblen <= len + 2) |
5096d490 | 4296 | xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, ".."); |
6973dcae | 4297 | else |
5096d490 | 4298 | xsnprintf(hex, sizeof(hex), "%s...", abbrev); |
6973dcae JH |
4299 | return hex; |
4300 | } | |
d6cece51 JK |
4301 | |
4302 | return oid_to_hex(oid); | |
6973dcae JH |
4303 | } |
4304 | ||
663af342 | 4305 | static void diff_flush_raw(struct diff_filepair *p, struct diff_options *opt) |
6973dcae | 4306 | { |
663af342 PH |
4307 | int line_termination = opt->line_termination; |
4308 | int inter_name_termination = line_termination ? '\t' : '\0'; | |
6973dcae | 4309 | |
30997bb8 | 4310 | fprintf(opt->file, "%s", diff_line_prefix(opt)); |
663af342 | 4311 | if (!(opt->output_format & DIFF_FORMAT_NAME_STATUS)) { |
c0c77734 | 4312 | fprintf(opt->file, ":%06o %06o %s ", p->one->mode, p->two->mode, |
d6cece51 | 4313 | diff_aligned_abbrev(&p->one->oid, opt->abbrev)); |
a0d12c44 | 4314 | fprintf(opt->file, "%s ", |
d6cece51 | 4315 | diff_aligned_abbrev(&p->two->oid, opt->abbrev)); |
6973dcae | 4316 | } |
663af342 | 4317 | if (p->score) { |
c0c77734 DB |
4318 | fprintf(opt->file, "%c%03d%c", p->status, similarity_index(p), |
4319 | inter_name_termination); | |
663af342 | 4320 | } else { |
c0c77734 | 4321 | fprintf(opt->file, "%c%c", p->status, inter_name_termination); |
6973dcae | 4322 | } |
6973dcae | 4323 | |
cd676a51 JH |
4324 | if (p->status == DIFF_STATUS_COPIED || |
4325 | p->status == DIFF_STATUS_RENAMED) { | |
4326 | const char *name_a, *name_b; | |
4327 | name_a = p->one->path; | |
4328 | name_b = p->two->path; | |
4329 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 DB |
4330 | write_name_quoted(name_a, opt->file, inter_name_termination); |
4331 | write_name_quoted(name_b, opt->file, line_termination); | |
663af342 | 4332 | } else { |
cd676a51 JH |
4333 | const char *name_a, *name_b; |
4334 | name_a = p->one->mode ? p->one->path : p->two->path; | |
4335 | name_b = NULL; | |
4336 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
c0c77734 | 4337 | write_name_quoted(name_a, opt->file, line_termination); |
663af342 | 4338 | } |
6973dcae JH |
4339 | } |
4340 | ||
4341 | int diff_unmodified_pair(struct diff_filepair *p) | |
4342 | { | |
4343 | /* This function is written stricter than necessary to support | |
4344 | * the currently implemented transformers, but the idea is to | |
4345 | * let transformers to produce diff_filepairs any way they want, | |
4346 | * and filter and clean them up here before producing the output. | |
4347 | */ | |
663af342 | 4348 | struct diff_filespec *one = p->one, *two = p->two; |
6973dcae JH |
4349 | |
4350 | if (DIFF_PAIR_UNMERGED(p)) | |
4351 | return 0; /* unmerged is interesting */ | |
4352 | ||
6973dcae JH |
4353 | /* deletion, addition, mode or type change |
4354 | * and rename are all interesting. | |
4355 | */ | |
4356 | if (DIFF_FILE_VALID(one) != DIFF_FILE_VALID(two) || | |
4357 | DIFF_PAIR_MODE_CHANGED(p) || | |
4358 | strcmp(one->path, two->path)) | |
4359 | return 0; | |
4360 | ||
4361 | /* both are valid and point at the same path. that is, we are | |
4362 | * dealing with a change. | |
4363 | */ | |
41c9560e | 4364 | if (one->oid_valid && two->oid_valid && |
a0d12c44 | 4365 | !oidcmp(&one->oid, &two->oid) && |
85adbf2f | 4366 | !one->dirty_submodule && !two->dirty_submodule) |
6973dcae | 4367 | return 1; /* no change */ |
41c9560e | 4368 | if (!one->oid_valid && !two->oid_valid) |
6973dcae JH |
4369 | return 1; /* both look at the same file on the filesystem. */ |
4370 | return 0; | |
4371 | } | |
4372 | ||
4373 | static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o) | |
4374 | { | |
4375 | if (diff_unmodified_pair(p)) | |
4376 | return; | |
4377 | ||
4378 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4379 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4380 | return; /* no tree diffs in patch format */ | |
4381 | ||
4382 | run_diff(p, o); | |
4383 | } | |
4384 | ||
4385 | static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o, | |
4386 | struct diffstat_t *diffstat) | |
4387 | { | |
4388 | if (diff_unmodified_pair(p)) | |
4389 | return; | |
4390 | ||
4391 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4392 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 4393 | return; /* no useful stat for tree diffs */ |
6973dcae JH |
4394 | |
4395 | run_diffstat(p, o, diffstat); | |
4396 | } | |
4397 | ||
88246898 JS |
4398 | static void diff_flush_checkdiff(struct diff_filepair *p, |
4399 | struct diff_options *o) | |
4400 | { | |
4401 | if (diff_unmodified_pair(p)) | |
4402 | return; | |
4403 | ||
4404 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4405 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
c3fced64 | 4406 | return; /* nothing to check in tree diffs */ |
88246898 JS |
4407 | |
4408 | run_checkdiff(p, o); | |
4409 | } | |
4410 | ||
6973dcae JH |
4411 | int diff_queue_is_empty(void) |
4412 | { | |
4413 | struct diff_queue_struct *q = &diff_queued_diff; | |
4414 | int i; | |
4415 | for (i = 0; i < q->nr; i++) | |
4416 | if (!diff_unmodified_pair(q->queue[i])) | |
4417 | return 0; | |
4418 | return 1; | |
4419 | } | |
4420 | ||
4421 | #if DIFF_DEBUG | |
4422 | void diff_debug_filespec(struct diff_filespec *s, int x, const char *one) | |
4423 | { | |
4424 | fprintf(stderr, "queue[%d] %s (%s) %s %06o %s\n", | |
4425 | x, one ? one : "", | |
4426 | s->path, | |
4427 | DIFF_FILE_VALID(s) ? "valid" : "invalid", | |
4428 | s->mode, | |
41c9560e | 4429 | s->oid_valid ? oid_to_hex(&s->oid) : ""); |
428d52a5 | 4430 | fprintf(stderr, "queue[%d] %s size %lu\n", |
6973dcae | 4431 | x, one ? one : "", |
428d52a5 | 4432 | s->size); |
6973dcae JH |
4433 | } |
4434 | ||
4435 | void diff_debug_filepair(const struct diff_filepair *p, int i) | |
4436 | { | |
4437 | diff_debug_filespec(p->one, i, "one"); | |
4438 | diff_debug_filespec(p->two, i, "two"); | |
64479711 | 4439 | fprintf(stderr, "score %d, status %c rename_used %d broken %d\n", |
6973dcae | 4440 | p->score, p->status ? p->status : '?', |
64479711 | 4441 | p->one->rename_used, p->broken_pair); |
6973dcae JH |
4442 | } |
4443 | ||
4444 | void diff_debug_queue(const char *msg, struct diff_queue_struct *q) | |
4445 | { | |
4446 | int i; | |
4447 | if (msg) | |
4448 | fprintf(stderr, "%s\n", msg); | |
4449 | fprintf(stderr, "q->nr = %d\n", q->nr); | |
4450 | for (i = 0; i < q->nr; i++) { | |
4451 | struct diff_filepair *p = q->queue[i]; | |
4452 | diff_debug_filepair(p, i); | |
4453 | } | |
4454 | } | |
4455 | #endif | |
4456 | ||
4457 | static void diff_resolve_rename_copy(void) | |
4458 | { | |
64479711 LT |
4459 | int i; |
4460 | struct diff_filepair *p; | |
6973dcae JH |
4461 | struct diff_queue_struct *q = &diff_queued_diff; |
4462 | ||
4463 | diff_debug_queue("resolve-rename-copy", q); | |
4464 | ||
4465 | for (i = 0; i < q->nr; i++) { | |
4466 | p = q->queue[i]; | |
4467 | p->status = 0; /* undecided */ | |
4468 | if (DIFF_PAIR_UNMERGED(p)) | |
4469 | p->status = DIFF_STATUS_UNMERGED; | |
4470 | else if (!DIFF_FILE_VALID(p->one)) | |
4471 | p->status = DIFF_STATUS_ADDED; | |
4472 | else if (!DIFF_FILE_VALID(p->two)) | |
4473 | p->status = DIFF_STATUS_DELETED; | |
4474 | else if (DIFF_PAIR_TYPE_CHANGED(p)) | |
4475 | p->status = DIFF_STATUS_TYPE_CHANGED; | |
4476 | ||
4477 | /* from this point on, we are dealing with a pair | |
4478 | * whose both sides are valid and of the same type, i.e. | |
4479 | * either in-place edit or rename/copy edit. | |
4480 | */ | |
4481 | else if (DIFF_PAIR_RENAME(p)) { | |
64479711 LT |
4482 | /* |
4483 | * A rename might have re-connected a broken | |
4484 | * pair up, causing the pathnames to be the | |
4485 | * same again. If so, that's not a rename at | |
4486 | * all, just a modification.. | |
4487 | * | |
4488 | * Otherwise, see if this source was used for | |
4489 | * multiple renames, in which case we decrement | |
4490 | * the count, and call it a copy. | |
6973dcae | 4491 | */ |
64479711 LT |
4492 | if (!strcmp(p->one->path, p->two->path)) |
4493 | p->status = DIFF_STATUS_MODIFIED; | |
4494 | else if (--p->one->rename_used > 0) | |
6973dcae | 4495 | p->status = DIFF_STATUS_COPIED; |
64479711 | 4496 | else |
6973dcae JH |
4497 | p->status = DIFF_STATUS_RENAMED; |
4498 | } | |
a0d12c44 | 4499 | else if (oidcmp(&p->one->oid, &p->two->oid) || |
d516c2d1 | 4500 | p->one->mode != p->two->mode || |
85adbf2f JL |
4501 | p->one->dirty_submodule || |
4502 | p->two->dirty_submodule || | |
a0d12c44 | 4503 | is_null_oid(&p->one->oid)) |
6973dcae JH |
4504 | p->status = DIFF_STATUS_MODIFIED; |
4505 | else { | |
4506 | /* This is a "no-change" entry and should not | |
4507 | * happen anymore, but prepare for broken callers. | |
4508 | */ | |
4509 | error("feeding unmodified %s to diffcore", | |
4510 | p->one->path); | |
4511 | p->status = DIFF_STATUS_UNKNOWN; | |
4512 | } | |
4513 | } | |
4514 | diff_debug_queue("resolve-rename-copy done", q); | |
4515 | } | |
4516 | ||
c6744349 | 4517 | static int check_pair_status(struct diff_filepair *p) |
6973dcae | 4518 | { |
6973dcae JH |
4519 | switch (p->status) { |
4520 | case DIFF_STATUS_UNKNOWN: | |
c6744349 | 4521 | return 0; |
6973dcae JH |
4522 | case 0: |
4523 | die("internal error in diff-resolve-rename-copy"); | |
6973dcae | 4524 | default: |
c6744349 | 4525 | return 1; |
6973dcae JH |
4526 | } |
4527 | } | |
4528 | ||
c6744349 TH |
4529 | static void flush_one_pair(struct diff_filepair *p, struct diff_options *opt) |
4530 | { | |
4531 | int fmt = opt->output_format; | |
4532 | ||
4533 | if (fmt & DIFF_FORMAT_CHECKDIFF) | |
4534 | diff_flush_checkdiff(p, opt); | |
4535 | else if (fmt & (DIFF_FORMAT_RAW | DIFF_FORMAT_NAME_STATUS)) | |
4536 | diff_flush_raw(p, opt); | |
cd676a51 JH |
4537 | else if (fmt & DIFF_FORMAT_NAME) { |
4538 | const char *name_a, *name_b; | |
4539 | name_a = p->two->path; | |
4540 | name_b = NULL; | |
4541 | strip_prefix(opt->prefix_length, &name_a, &name_b); | |
f5022b5f | 4542 | fprintf(opt->file, "%s", diff_line_prefix(opt)); |
c0c77734 | 4543 | write_name_quoted(name_a, opt->file, opt->line_termination); |
cd676a51 | 4544 | } |
c6744349 TH |
4545 | } |
4546 | ||
c0c77734 | 4547 | static void show_file_mode_name(FILE *file, const char *newdelete, struct diff_filespec *fs) |
4bbd261b SE |
4548 | { |
4549 | if (fs->mode) | |
c0c77734 | 4550 | fprintf(file, " %s mode %06o ", newdelete, fs->mode); |
4bbd261b | 4551 | else |
c0c77734 DB |
4552 | fprintf(file, " %s ", newdelete); |
4553 | write_name_quoted(fs->path, file, '\n'); | |
4bbd261b SE |
4554 | } |
4555 | ||
4556 | ||
7be57610 BY |
4557 | static void show_mode_change(FILE *file, struct diff_filepair *p, int show_name, |
4558 | const char *line_prefix) | |
4bbd261b SE |
4559 | { |
4560 | if (p->one->mode && p->two->mode && p->one->mode != p->two->mode) { | |
7be57610 BY |
4561 | fprintf(file, "%s mode change %06o => %06o%c", line_prefix, p->one->mode, |
4562 | p->two->mode, show_name ? ' ' : '\n'); | |
0d26a64e | 4563 | if (show_name) { |
c0c77734 | 4564 | write_name_quoted(p->two->path, file, '\n'); |
0d26a64e | 4565 | } |
4bbd261b SE |
4566 | } |
4567 | } | |
4568 | ||
7be57610 BY |
4569 | static void show_rename_copy(FILE *file, const char *renamecopy, struct diff_filepair *p, |
4570 | const char *line_prefix) | |
4bbd261b | 4571 | { |
b9f44164 | 4572 | char *names = pprint_rename(p->one->path, p->two->path); |
4bbd261b | 4573 | |
c0c77734 | 4574 | fprintf(file, " %s %s (%d%%)\n", renamecopy, names, similarity_index(p)); |
b9f44164 | 4575 | free(names); |
7be57610 | 4576 | show_mode_change(file, p, 0, line_prefix); |
4bbd261b SE |
4577 | } |
4578 | ||
7be57610 | 4579 | static void diff_summary(struct diff_options *opt, struct diff_filepair *p) |
4bbd261b | 4580 | { |
7be57610 | 4581 | FILE *file = opt->file; |
30997bb8 | 4582 | const char *line_prefix = diff_line_prefix(opt); |
7be57610 | 4583 | |
4bbd261b SE |
4584 | switch(p->status) { |
4585 | case DIFF_STATUS_DELETED: | |
7be57610 | 4586 | fputs(line_prefix, file); |
c0c77734 | 4587 | show_file_mode_name(file, "delete", p->one); |
4bbd261b SE |
4588 | break; |
4589 | case DIFF_STATUS_ADDED: | |
7be57610 | 4590 | fputs(line_prefix, file); |
c0c77734 | 4591 | show_file_mode_name(file, "create", p->two); |
4bbd261b SE |
4592 | break; |
4593 | case DIFF_STATUS_COPIED: | |
7be57610 BY |
4594 | fputs(line_prefix, file); |
4595 | show_rename_copy(file, "copy", p, line_prefix); | |
4bbd261b SE |
4596 | break; |
4597 | case DIFF_STATUS_RENAMED: | |
7be57610 BY |
4598 | fputs(line_prefix, file); |
4599 | show_rename_copy(file, "rename", p, line_prefix); | |
4bbd261b SE |
4600 | break; |
4601 | default: | |
4602 | if (p->score) { | |
7be57610 | 4603 | fprintf(file, "%s rewrite ", line_prefix); |
c0c77734 DB |
4604 | write_name_quoted(p->two->path, file, ' '); |
4605 | fprintf(file, "(%d%%)\n", similarity_index(p)); | |
663af342 | 4606 | } |
7be57610 | 4607 | show_mode_change(file, p, !p->score, line_prefix); |
4bbd261b SE |
4608 | break; |
4609 | } | |
4610 | } | |
4611 | ||
fcb3d0ad | 4612 | struct patch_id_t { |
9126f009 | 4613 | git_SHA_CTX *ctx; |
fcb3d0ad JS |
4614 | int patchlen; |
4615 | }; | |
4616 | ||
4617 | static int remove_space(char *line, int len) | |
4618 | { | |
4619 | int i; | |
663af342 PH |
4620 | char *dst = line; |
4621 | unsigned char c; | |
fcb3d0ad | 4622 | |
663af342 PH |
4623 | for (i = 0; i < len; i++) |
4624 | if (!isspace((c = line[i]))) | |
4625 | *dst++ = c; | |
fcb3d0ad | 4626 | |
663af342 | 4627 | return dst - line; |
fcb3d0ad JS |
4628 | } |
4629 | ||
4630 | static void patch_id_consume(void *priv, char *line, unsigned long len) | |
4631 | { | |
4632 | struct patch_id_t *data = priv; | |
4633 | int new_len; | |
4634 | ||
4635 | /* Ignore line numbers when computing the SHA1 of the patch */ | |
59556548 | 4636 | if (starts_with(line, "@@ -")) |
fcb3d0ad JS |
4637 | return; |
4638 | ||
4639 | new_len = remove_space(line, len); | |
4640 | ||
9126f009 | 4641 | git_SHA1_Update(data->ctx, line, new_len); |
fcb3d0ad JS |
4642 | data->patchlen += new_len; |
4643 | } | |
4644 | ||
977db6b4 JK |
4645 | static void patch_id_add_string(git_SHA_CTX *ctx, const char *str) |
4646 | { | |
4647 | git_SHA1_Update(ctx, str, strlen(str)); | |
4648 | } | |
4649 | ||
4650 | static void patch_id_add_mode(git_SHA_CTX *ctx, unsigned mode) | |
4651 | { | |
4652 | /* large enough for 2^32 in octal */ | |
4653 | char buf[12]; | |
4654 | int len = xsnprintf(buf, sizeof(buf), "%06o", mode); | |
4655 | git_SHA1_Update(ctx, buf, len); | |
4656 | } | |
4657 | ||
fcb3d0ad | 4658 | /* returns 0 upon success, and writes result into sha1 */ |
bd25f288 | 4659 | static int diff_get_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only) |
fcb3d0ad JS |
4660 | { |
4661 | struct diff_queue_struct *q = &diff_queued_diff; | |
4662 | int i; | |
9126f009 | 4663 | git_SHA_CTX ctx; |
fcb3d0ad | 4664 | struct patch_id_t data; |
fcb3d0ad | 4665 | |
9126f009 | 4666 | git_SHA1_Init(&ctx); |
fcb3d0ad JS |
4667 | memset(&data, 0, sizeof(struct patch_id_t)); |
4668 | data.ctx = &ctx; | |
fcb3d0ad JS |
4669 | |
4670 | for (i = 0; i < q->nr; i++) { | |
4671 | xpparam_t xpp; | |
4672 | xdemitconf_t xecfg; | |
fcb3d0ad JS |
4673 | mmfile_t mf1, mf2; |
4674 | struct diff_filepair *p = q->queue[i]; | |
4675 | int len1, len2; | |
4676 | ||
9ccd0a88 | 4677 | memset(&xpp, 0, sizeof(xpp)); |
30b25010 | 4678 | memset(&xecfg, 0, sizeof(xecfg)); |
fcb3d0ad JS |
4679 | if (p->status == 0) |
4680 | return error("internal diff status error"); | |
4681 | if (p->status == DIFF_STATUS_UNKNOWN) | |
4682 | continue; | |
4683 | if (diff_unmodified_pair(p)) | |
4684 | continue; | |
4685 | if ((DIFF_FILE_VALID(p->one) && S_ISDIR(p->one->mode)) || | |
4686 | (DIFF_FILE_VALID(p->two) && S_ISDIR(p->two->mode))) | |
4687 | continue; | |
4688 | if (DIFF_PAIR_UNMERGED(p)) | |
4689 | continue; | |
4690 | ||
94e327e9 BW |
4691 | diff_fill_oid_info(p->one); |
4692 | diff_fill_oid_info(p->two); | |
fcb3d0ad | 4693 | |
fcb3d0ad JS |
4694 | len1 = remove_space(p->one->path, strlen(p->one->path)); |
4695 | len2 = remove_space(p->two->path, strlen(p->two->path)); | |
977db6b4 JK |
4696 | patch_id_add_string(&ctx, "diff--git"); |
4697 | patch_id_add_string(&ctx, "a/"); | |
4698 | git_SHA1_Update(&ctx, p->one->path, len1); | |
4699 | patch_id_add_string(&ctx, "b/"); | |
4700 | git_SHA1_Update(&ctx, p->two->path, len2); | |
4701 | ||
4702 | if (p->one->mode == 0) { | |
4703 | patch_id_add_string(&ctx, "newfilemode"); | |
4704 | patch_id_add_mode(&ctx, p->two->mode); | |
4705 | patch_id_add_string(&ctx, "---/dev/null"); | |
4706 | patch_id_add_string(&ctx, "+++b/"); | |
4707 | git_SHA1_Update(&ctx, p->two->path, len2); | |
4708 | } else if (p->two->mode == 0) { | |
4709 | patch_id_add_string(&ctx, "deletedfilemode"); | |
4710 | patch_id_add_mode(&ctx, p->one->mode); | |
4711 | patch_id_add_string(&ctx, "---a/"); | |
4712 | git_SHA1_Update(&ctx, p->one->path, len1); | |
4713 | patch_id_add_string(&ctx, "+++/dev/null"); | |
4714 | } else { | |
4715 | patch_id_add_string(&ctx, "---a/"); | |
4716 | git_SHA1_Update(&ctx, p->one->path, len1); | |
4717 | patch_id_add_string(&ctx, "+++b/"); | |
4718 | git_SHA1_Update(&ctx, p->two->path, len2); | |
4719 | } | |
fcb3d0ad | 4720 | |
3e8e32c3 KW |
4721 | if (diff_header_only) |
4722 | continue; | |
4723 | ||
4724 | if (fill_mmfile(&mf1, p->one) < 0 || | |
4725 | fill_mmfile(&mf2, p->two) < 0) | |
4726 | return error("unable to read files to diff"); | |
4727 | ||
34597c1f CB |
4728 | if (diff_filespec_is_binary(p->one) || |
4729 | diff_filespec_is_binary(p->two)) { | |
a0d12c44 | 4730 | git_SHA1_Update(&ctx, oid_to_hex(&p->one->oid), |
bd25f288 | 4731 | GIT_SHA1_HEXSZ); |
a0d12c44 | 4732 | git_SHA1_Update(&ctx, oid_to_hex(&p->two->oid), |
bd25f288 | 4733 | GIT_SHA1_HEXSZ); |
34597c1f CB |
4734 | continue; |
4735 | } | |
4736 | ||
582aa00b | 4737 | xpp.flags = 0; |
fcb3d0ad | 4738 | xecfg.ctxlen = 3; |
ad14b450 | 4739 | xecfg.flags = 0; |
3efb9880 JK |
4740 | if (xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data, |
4741 | &xpp, &xecfg)) | |
4742 | return error("unable to generate patch-id diff for %s", | |
4743 | p->one->path); | |
fcb3d0ad JS |
4744 | } |
4745 | ||
bd25f288 | 4746 | git_SHA1_Final(oid->hash, &ctx); |
fcb3d0ad JS |
4747 | return 0; |
4748 | } | |
4749 | ||
bd25f288 | 4750 | int diff_flush_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only) |
fcb3d0ad JS |
4751 | { |
4752 | struct diff_queue_struct *q = &diff_queued_diff; | |
4753 | int i; | |
bd25f288 | 4754 | int result = diff_get_patch_id(options, oid, diff_header_only); |
fcb3d0ad JS |
4755 | |
4756 | for (i = 0; i < q->nr; i++) | |
4757 | diff_free_filepair(q->queue[i]); | |
4758 | ||
4759 | free(q->queue); | |
9ca5df90 | 4760 | DIFF_QUEUE_CLEAR(q); |
fcb3d0ad JS |
4761 | |
4762 | return result; | |
4763 | } | |
4764 | ||
946c3784 | 4765 | static int is_summary_empty(const struct diff_queue_struct *q) |
6973dcae | 4766 | { |
6973dcae | 4767 | int i; |
6973dcae | 4768 | |
946c3784 TH |
4769 | for (i = 0; i < q->nr; i++) { |
4770 | const struct diff_filepair *p = q->queue[i]; | |
4771 | ||
4772 | switch (p->status) { | |
4773 | case DIFF_STATUS_DELETED: | |
4774 | case DIFF_STATUS_ADDED: | |
4775 | case DIFF_STATUS_COPIED: | |
4776 | case DIFF_STATUS_RENAMED: | |
4777 | return 0; | |
4778 | default: | |
4779 | if (p->score) | |
4780 | return 0; | |
4781 | if (p->one->mode && p->two->mode && | |
4782 | p->one->mode != p->two->mode) | |
4783 | return 0; | |
4784 | break; | |
4785 | } | |
6973dcae | 4786 | } |
946c3784 TH |
4787 | return 1; |
4788 | } | |
4789 | ||
f31027c9 | 4790 | static const char rename_limit_warning[] = |
db424979 | 4791 | N_("inexact rename detection was skipped due to too many files."); |
f31027c9 JH |
4792 | |
4793 | static const char degrade_cc_to_c_warning[] = | |
db424979 | 4794 | N_("only found copies from modified paths due to too many files."); |
f31027c9 JH |
4795 | |
4796 | static const char rename_limit_advice[] = | |
db424979 VA |
4797 | N_("you may want to set your %s variable to at least " |
4798 | "%d and retry the command."); | |
f31027c9 JH |
4799 | |
4800 | void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc) | |
4801 | { | |
4802 | if (degraded_cc) | |
db424979 | 4803 | warning(_(degrade_cc_to_c_warning)); |
f31027c9 | 4804 | else if (needed) |
db424979 | 4805 | warning(_(rename_limit_warning)); |
f31027c9 JH |
4806 | else |
4807 | return; | |
4808 | if (0 < needed && needed < 32767) | |
db424979 | 4809 | warning(_(rename_limit_advice), varname, needed); |
f31027c9 JH |
4810 | } |
4811 | ||
ec331506 SB |
4812 | static void diff_flush_patch_all_file_pairs(struct diff_options *o) |
4813 | { | |
4814 | int i; | |
4815 | struct diff_queue_struct *q = &diff_queued_diff; | |
091f8e28 SB |
4816 | |
4817 | if (WSEH_NEW & WS_RULE_MASK) | |
4818 | die("BUG: WS rules bit mask overlaps with diff symbol flags"); | |
4819 | ||
ec331506 SB |
4820 | for (i = 0; i < q->nr; i++) { |
4821 | struct diff_filepair *p = q->queue[i]; | |
4822 | if (check_pair_status(p)) | |
4823 | diff_flush_patch(p, o); | |
4824 | } | |
4825 | } | |
4826 | ||
6973dcae JH |
4827 | void diff_flush(struct diff_options *options) |
4828 | { | |
4829 | struct diff_queue_struct *q = &diff_queued_diff; | |
c6744349 | 4830 | int i, output_format = options->output_format; |
946c3784 | 4831 | int separator = 0; |
1c57a627 | 4832 | int dirstat_by_line = 0; |
6973dcae | 4833 | |
c6744349 TH |
4834 | /* |
4835 | * Order: raw, stat, summary, patch | |
4836 | * or: name/name-status/checkdiff (other bits clear) | |
4837 | */ | |
946c3784 TH |
4838 | if (!q->nr) |
4839 | goto free_queue; | |
6973dcae | 4840 | |
c6744349 TH |
4841 | if (output_format & (DIFF_FORMAT_RAW | |
4842 | DIFF_FORMAT_NAME | | |
4843 | DIFF_FORMAT_NAME_STATUS | | |
4844 | DIFF_FORMAT_CHECKDIFF)) { | |
6973dcae JH |
4845 | for (i = 0; i < q->nr; i++) { |
4846 | struct diff_filepair *p = q->queue[i]; | |
c6744349 TH |
4847 | if (check_pair_status(p)) |
4848 | flush_one_pair(p, options); | |
6973dcae | 4849 | } |
946c3784 | 4850 | separator++; |
6973dcae | 4851 | } |
c6744349 | 4852 | |
1c57a627 JH |
4853 | if (output_format & DIFF_FORMAT_DIRSTAT && DIFF_OPT_TST(options, DIRSTAT_BY_LINE)) |
4854 | dirstat_by_line = 1; | |
4855 | ||
4856 | if (output_format & (DIFF_FORMAT_DIFFSTAT|DIFF_FORMAT_SHORTSTAT|DIFF_FORMAT_NUMSTAT) || | |
4857 | dirstat_by_line) { | |
5e2b0636 | 4858 | struct diffstat_t diffstat; |
c6744349 | 4859 | |
5e2b0636 | 4860 | memset(&diffstat, 0, sizeof(struct diffstat_t)); |
6973dcae JH |
4861 | for (i = 0; i < q->nr; i++) { |
4862 | struct diff_filepair *p = q->queue[i]; | |
c6744349 | 4863 | if (check_pair_status(p)) |
5e2b0636 | 4864 | diff_flush_stat(p, options, &diffstat); |
6973dcae | 4865 | } |
74e2abe5 JH |
4866 | if (output_format & DIFF_FORMAT_NUMSTAT) |
4867 | show_numstat(&diffstat, options); | |
4868 | if (output_format & DIFF_FORMAT_DIFFSTAT) | |
4869 | show_stats(&diffstat, options); | |
f604652e | 4870 | if (output_format & DIFF_FORMAT_SHORTSTAT) |
c0c77734 | 4871 | show_shortstats(&diffstat, options); |
ab27389a | 4872 | if (output_format & DIFF_FORMAT_DIRSTAT && dirstat_by_line) |
1c57a627 | 4873 | show_dirstat_by_line(&diffstat, options); |
f604652e | 4874 | free_diffstat_info(&diffstat); |
3969cf7d | 4875 | separator++; |
6973dcae | 4876 | } |
1c57a627 | 4877 | if ((output_format & DIFF_FORMAT_DIRSTAT) && !dirstat_by_line) |
c04a7155 | 4878 | show_dirstat(options); |
6973dcae | 4879 | |
946c3784 | 4880 | if (output_format & DIFF_FORMAT_SUMMARY && !is_summary_empty(q)) { |
7be57610 BY |
4881 | for (i = 0; i < q->nr; i++) { |
4882 | diff_summary(options, q->queue[i]); | |
4883 | } | |
3969cf7d | 4884 | separator++; |
6973dcae JH |
4885 | } |
4886 | ||
6977c250 LA |
4887 | if (output_format & DIFF_FORMAT_NO_OUTPUT && |
4888 | DIFF_OPT_TST(options, EXIT_WITH_STATUS) && | |
4889 | DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4890 | /* | |
4891 | * run diff_flush_patch for the exit status. setting | |
749f763d | 4892 | * options->file to /dev/null should be safe, because we |
6977c250 LA |
4893 | * aren't supposed to produce any output anyway. |
4894 | */ | |
4895 | if (options->close_file) | |
4896 | fclose(options->file); | |
23a9e071 | 4897 | options->file = xfopen("/dev/null", "w"); |
6977c250 LA |
4898 | options->close_file = 1; |
4899 | for (i = 0; i < q->nr; i++) { | |
4900 | struct diff_filepair *p = q->queue[i]; | |
4901 | if (check_pair_status(p)) | |
4902 | diff_flush_patch(p, options); | |
4903 | if (options->found_changes) | |
4904 | break; | |
4905 | } | |
4906 | } | |
4907 | ||
c6744349 | 4908 | if (output_format & DIFF_FORMAT_PATCH) { |
946c3784 | 4909 | if (separator) { |
091f8e28 | 4910 | emit_diff_symbol(options, DIFF_SYMBOL_SEPARATOR, NULL, 0, 0); |
946c3784 TH |
4911 | if (options->stat_sep) { |
4912 | /* attach patch instead of inline */ | |
c0c77734 | 4913 | fputs(options->stat_sep, options->file); |
946c3784 | 4914 | } |
c6744349 TH |
4915 | } |
4916 | ||
ec331506 | 4917 | diff_flush_patch_all_file_pairs(options); |
4bbd261b SE |
4918 | } |
4919 | ||
04245581 JK |
4920 | if (output_format & DIFF_FORMAT_CALLBACK) |
4921 | options->format_callback(q, options, options->format_callback_data); | |
4922 | ||
c6744349 TH |
4923 | for (i = 0; i < q->nr; i++) |
4924 | diff_free_filepair(q->queue[i]); | |
946c3784 | 4925 | free_queue: |
6973dcae | 4926 | free(q->queue); |
9ca5df90 | 4927 | DIFF_QUEUE_CLEAR(q); |
c0c77734 DB |
4928 | if (options->close_file) |
4929 | fclose(options->file); | |
f245194f JH |
4930 | |
4931 | /* | |
97bf2a08 | 4932 | * Report the content-level differences with HAS_CHANGES; |
f245194f JH |
4933 | * diff_addremove/diff_change does not set the bit when |
4934 | * DIFF_FROM_CONTENTS is in effect (e.g. with -w). | |
4935 | */ | |
4936 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) { | |
4937 | if (options->found_changes) | |
4938 | DIFF_OPT_SET(options, HAS_CHANGES); | |
4939 | else | |
4940 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
4941 | } | |
6973dcae JH |
4942 | } |
4943 | ||
08578fa1 JH |
4944 | static int match_filter(const struct diff_options *options, const struct diff_filepair *p) |
4945 | { | |
4946 | return (((p->status == DIFF_STATUS_MODIFIED) && | |
4947 | ((p->score && | |
1ecc1cbd | 4948 | filter_bit_tst(DIFF_STATUS_FILTER_BROKEN, options)) || |
08578fa1 | 4949 | (!p->score && |
1ecc1cbd | 4950 | filter_bit_tst(DIFF_STATUS_MODIFIED, options)))) || |
08578fa1 | 4951 | ((p->status != DIFF_STATUS_MODIFIED) && |
1ecc1cbd | 4952 | filter_bit_tst(p->status, options))); |
08578fa1 JH |
4953 | } |
4954 | ||
949226fe | 4955 | static void diffcore_apply_filter(struct diff_options *options) |
6973dcae JH |
4956 | { |
4957 | int i; | |
4958 | struct diff_queue_struct *q = &diff_queued_diff; | |
4959 | struct diff_queue_struct outq; | |
949226fe | 4960 | |
9ca5df90 | 4961 | DIFF_QUEUE_CLEAR(&outq); |
6973dcae | 4962 | |
1ecc1cbd | 4963 | if (!options->filter) |
6973dcae JH |
4964 | return; |
4965 | ||
1ecc1cbd | 4966 | if (filter_bit_tst(DIFF_STATUS_FILTER_AON, options)) { |
6973dcae JH |
4967 | int found; |
4968 | for (i = found = 0; !found && i < q->nr; i++) { | |
08578fa1 | 4969 | if (match_filter(options, q->queue[i])) |
6973dcae JH |
4970 | found++; |
4971 | } | |
4972 | if (found) | |
4973 | return; | |
4974 | ||
4975 | /* otherwise we will clear the whole queue | |
4976 | * by copying the empty outq at the end of this | |
4977 | * function, but first clear the current entries | |
4978 | * in the queue. | |
4979 | */ | |
4980 | for (i = 0; i < q->nr; i++) | |
4981 | diff_free_filepair(q->queue[i]); | |
4982 | } | |
4983 | else { | |
4984 | /* Only the matching ones */ | |
4985 | for (i = 0; i < q->nr; i++) { | |
4986 | struct diff_filepair *p = q->queue[i]; | |
08578fa1 | 4987 | if (match_filter(options, p)) |
6973dcae JH |
4988 | diff_q(&outq, p); |
4989 | else | |
4990 | diff_free_filepair(p); | |
4991 | } | |
4992 | } | |
4993 | free(q->queue); | |
4994 | *q = outq; | |
4995 | } | |
4996 | ||
5701115a SV |
4997 | /* Check whether two filespecs with the same mode and size are identical */ |
4998 | static int diff_filespec_is_identical(struct diff_filespec *one, | |
4999 | struct diff_filespec *two) | |
5000 | { | |
2b459b48 JH |
5001 | if (S_ISGITLINK(one->mode)) |
5002 | return 0; | |
5701115a SV |
5003 | if (diff_populate_filespec(one, 0)) |
5004 | return 0; | |
5005 | if (diff_populate_filespec(two, 0)) | |
5006 | return 0; | |
5007 | return !memcmp(one->data, two->data, one->size); | |
5008 | } | |
5009 | ||
fceb9072 NTND |
5010 | static int diff_filespec_check_stat_unmatch(struct diff_filepair *p) |
5011 | { | |
f34b205f NTND |
5012 | if (p->done_skip_stat_unmatch) |
5013 | return p->skip_stat_unmatch_result; | |
5014 | ||
5015 | p->done_skip_stat_unmatch = 1; | |
5016 | p->skip_stat_unmatch_result = 0; | |
fceb9072 NTND |
5017 | /* |
5018 | * 1. Entries that come from stat info dirtiness | |
5019 | * always have both sides (iow, not create/delete), | |
5020 | * one side of the object name is unknown, with | |
5021 | * the same mode and size. Keep the ones that | |
5022 | * do not match these criteria. They have real | |
5023 | * differences. | |
5024 | * | |
5025 | * 2. At this point, the file is known to be modified, | |
5026 | * with the same mode and size, and the object | |
5027 | * name of one side is unknown. Need to inspect | |
5028 | * the identical contents. | |
5029 | */ | |
5030 | if (!DIFF_FILE_VALID(p->one) || /* (1) */ | |
5031 | !DIFF_FILE_VALID(p->two) || | |
41c9560e | 5032 | (p->one->oid_valid && p->two->oid_valid) || |
fceb9072 | 5033 | (p->one->mode != p->two->mode) || |
8e5dd3d6 NTND |
5034 | diff_populate_filespec(p->one, CHECK_SIZE_ONLY) || |
5035 | diff_populate_filespec(p->two, CHECK_SIZE_ONLY) || | |
fceb9072 NTND |
5036 | (p->one->size != p->two->size) || |
5037 | !diff_filespec_is_identical(p->one, p->two)) /* (2) */ | |
f34b205f NTND |
5038 | p->skip_stat_unmatch_result = 1; |
5039 | return p->skip_stat_unmatch_result; | |
fceb9072 NTND |
5040 | } |
5041 | ||
fb13227e JH |
5042 | static void diffcore_skip_stat_unmatch(struct diff_options *diffopt) |
5043 | { | |
5044 | int i; | |
5045 | struct diff_queue_struct *q = &diff_queued_diff; | |
5046 | struct diff_queue_struct outq; | |
9ca5df90 | 5047 | DIFF_QUEUE_CLEAR(&outq); |
fb13227e JH |
5048 | |
5049 | for (i = 0; i < q->nr; i++) { | |
5050 | struct diff_filepair *p = q->queue[i]; | |
5051 | ||
fceb9072 | 5052 | if (diff_filespec_check_stat_unmatch(p)) |
fb13227e JH |
5053 | diff_q(&outq, p); |
5054 | else { | |
5055 | /* | |
5056 | * The caller can subtract 1 from skip_stat_unmatch | |
5057 | * to determine how many paths were dirty only | |
5058 | * due to stat info mismatch. | |
5059 | */ | |
8f67f8ae | 5060 | if (!DIFF_OPT_TST(diffopt, NO_INDEX)) |
6d2d9e86 | 5061 | diffopt->skip_stat_unmatch++; |
fb13227e JH |
5062 | diff_free_filepair(p); |
5063 | } | |
5064 | } | |
5065 | free(q->queue); | |
5066 | *q = outq; | |
5067 | } | |
5068 | ||
730f7284 JH |
5069 | static int diffnamecmp(const void *a_, const void *b_) |
5070 | { | |
5071 | const struct diff_filepair *a = *((const struct diff_filepair **)a_); | |
5072 | const struct diff_filepair *b = *((const struct diff_filepair **)b_); | |
5073 | const char *name_a, *name_b; | |
5074 | ||
5075 | name_a = a->one ? a->one->path : a->two->path; | |
5076 | name_b = b->one ? b->one->path : b->two->path; | |
5077 | return strcmp(name_a, name_b); | |
5078 | } | |
5079 | ||
5080 | void diffcore_fix_diff_index(struct diff_options *options) | |
5081 | { | |
5082 | struct diff_queue_struct *q = &diff_queued_diff; | |
9ed0d8d6 | 5083 | QSORT(q->queue, q->nr, diffnamecmp); |
730f7284 JH |
5084 | } |
5085 | ||
6973dcae JH |
5086 | void diffcore_std(struct diff_options *options) |
5087 | { | |
7195fbfa | 5088 | /* NOTE please keep the following in sync with diff_tree_combined() */ |
9d865356 | 5089 | if (options->skip_stat_unmatch) |
fb13227e | 5090 | diffcore_skip_stat_unmatch(options); |
44c48a90 JH |
5091 | if (!options->found_follow) { |
5092 | /* See try_to_follow_renames() in tree-diff.c */ | |
5093 | if (options->break_opt != -1) | |
5094 | diffcore_break(options->break_opt); | |
5095 | if (options->detect_rename) | |
5096 | diffcore_rename(options); | |
5097 | if (options->break_opt != -1) | |
5098 | diffcore_merge_broken(); | |
5099 | } | |
6973dcae | 5100 | if (options->pickaxe) |
382f013b | 5101 | diffcore_pickaxe(options); |
6973dcae JH |
5102 | if (options->orderfile) |
5103 | diffcore_order(options->orderfile); | |
44c48a90 JH |
5104 | if (!options->found_follow) |
5105 | /* See try_to_follow_renames() in tree-diff.c */ | |
5106 | diff_resolve_rename_copy(); | |
949226fe | 5107 | diffcore_apply_filter(options); |
68aacb2f | 5108 | |
f245194f | 5109 | if (diff_queued_diff.nr && !DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
8f67f8ae PH |
5110 | DIFF_OPT_SET(options, HAS_CHANGES); |
5111 | else | |
5112 | DIFF_OPT_CLR(options, HAS_CHANGES); | |
1da6175d | 5113 | |
44c48a90 | 5114 | options->found_follow = 0; |
6973dcae JH |
5115 | } |
5116 | ||
da31b358 JH |
5117 | int diff_result_code(struct diff_options *opt, int status) |
5118 | { | |
5119 | int result = 0; | |
f31027c9 | 5120 | |
c9fc4415 | 5121 | diff_warn_rename_limit("diff.renameLimit", |
f31027c9 JH |
5122 | opt->needed_rename_limit, |
5123 | opt->degraded_cc_to_c); | |
da31b358 JH |
5124 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && |
5125 | !(opt->output_format & DIFF_FORMAT_CHECKDIFF)) | |
5126 | return status; | |
5127 | if (DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
5128 | DIFF_OPT_TST(opt, HAS_CHANGES)) | |
5129 | result |= 01; | |
5130 | if ((opt->output_format & DIFF_FORMAT_CHECKDIFF) && | |
5131 | DIFF_OPT_TST(opt, CHECK_FAILED)) | |
5132 | result |= 02; | |
5133 | return result; | |
5134 | } | |
6973dcae | 5135 | |
28b9264d JH |
5136 | int diff_can_quit_early(struct diff_options *opt) |
5137 | { | |
5138 | return (DIFF_OPT_TST(opt, QUICK) && | |
5139 | !opt->filter && | |
5140 | DIFF_OPT_TST(opt, HAS_CHANGES)); | |
5141 | } | |
5142 | ||
aee9c7d6 JL |
5143 | /* |
5144 | * Shall changes to this submodule be ignored? | |
5145 | * | |
5146 | * Submodule changes can be configured to be ignored separately for each path, | |
5147 | * but that configuration can be overridden from the command line. | |
5148 | */ | |
5149 | static int is_submodule_ignored(const char *path, struct diff_options *options) | |
5150 | { | |
5151 | int ignored = 0; | |
5152 | unsigned orig_flags = options->flags; | |
5153 | if (!DIFF_OPT_TST(options, OVERRIDE_SUBMODULE_CONFIG)) | |
5154 | set_diffopt_flags_from_submodule_config(options, path); | |
5155 | if (DIFF_OPT_TST(options, IGNORE_SUBMODULES)) | |
5156 | ignored = 1; | |
5157 | options->flags = orig_flags; | |
5158 | return ignored; | |
5159 | } | |
5160 | ||
6973dcae JH |
5161 | void diff_addremove(struct diff_options *options, |
5162 | int addremove, unsigned mode, | |
c26022ea BW |
5163 | const struct object_id *oid, |
5164 | int oid_valid, | |
e3d42c47 | 5165 | const char *concatpath, unsigned dirty_submodule) |
6973dcae | 5166 | { |
6973dcae JH |
5167 | struct diff_filespec *one, *two; |
5168 | ||
aee9c7d6 | 5169 | if (S_ISGITLINK(mode) && is_submodule_ignored(concatpath, options)) |
50fd9bd8 JS |
5170 | return; |
5171 | ||
6973dcae JH |
5172 | /* This may look odd, but it is a preparation for |
5173 | * feeding "there are unchanged files which should | |
5174 | * not produce diffs, but when you are doing copy | |
5175 | * detection you would need them, so here they are" | |
5176 | * entries to the diff-core. They will be prefixed | |
5177 | * with something like '=' or '*' (I haven't decided | |
5178 | * which but should not make any difference). | |
a6080a0a | 5179 | * Feeding the same new and old to diff_change() |
6973dcae JH |
5180 | * also has the same effect. |
5181 | * Before the final output happens, they are pruned after | |
5182 | * merged into rename/copy pairs as appropriate. | |
5183 | */ | |
8f67f8ae | 5184 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) |
6973dcae JH |
5185 | addremove = (addremove == '+' ? '-' : |
5186 | addremove == '-' ? '+' : addremove); | |
5187 | ||
cd676a51 JH |
5188 | if (options->prefix && |
5189 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
5190 | return; | |
5191 | ||
6973dcae JH |
5192 | one = alloc_filespec(concatpath); |
5193 | two = alloc_filespec(concatpath); | |
5194 | ||
5195 | if (addremove != '+') | |
f9704c2d | 5196 | fill_filespec(one, oid, oid_valid, mode); |
e3d42c47 | 5197 | if (addremove != '-') { |
f9704c2d | 5198 | fill_filespec(two, oid, oid_valid, mode); |
e3d42c47 JL |
5199 | two->dirty_submodule = dirty_submodule; |
5200 | } | |
6973dcae JH |
5201 | |
5202 | diff_queue(&diff_queued_diff, one, two); | |
f245194f JH |
5203 | if (!DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
5204 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
5205 | } |
5206 | ||
5207 | void diff_change(struct diff_options *options, | |
5208 | unsigned old_mode, unsigned new_mode, | |
94a0097a BW |
5209 | const struct object_id *old_oid, |
5210 | const struct object_id *new_oid, | |
5211 | int old_oid_valid, int new_oid_valid, | |
e3d42c47 JL |
5212 | const char *concatpath, |
5213 | unsigned old_dirty_submodule, unsigned new_dirty_submodule) | |
6973dcae | 5214 | { |
6973dcae | 5215 | struct diff_filespec *one, *two; |
f34b205f | 5216 | struct diff_filepair *p; |
6973dcae | 5217 | |
aee9c7d6 JL |
5218 | if (S_ISGITLINK(old_mode) && S_ISGITLINK(new_mode) && |
5219 | is_submodule_ignored(concatpath, options)) | |
50fd9bd8 JS |
5220 | return; |
5221 | ||
8f67f8ae | 5222 | if (DIFF_OPT_TST(options, REVERSE_DIFF)) { |
35d803bc | 5223 | SWAP(old_mode, new_mode); |
94a0097a BW |
5224 | SWAP(old_oid, new_oid); |
5225 | SWAP(old_oid_valid, new_oid_valid); | |
35d803bc | 5226 | SWAP(old_dirty_submodule, new_dirty_submodule); |
6973dcae | 5227 | } |
cd676a51 JH |
5228 | |
5229 | if (options->prefix && | |
5230 | strncmp(concatpath, options->prefix, options->prefix_length)) | |
5231 | return; | |
5232 | ||
6973dcae JH |
5233 | one = alloc_filespec(concatpath); |
5234 | two = alloc_filespec(concatpath); | |
f9704c2d BW |
5235 | fill_filespec(one, old_oid, old_oid_valid, old_mode); |
5236 | fill_filespec(two, new_oid, new_oid_valid, new_mode); | |
e3d42c47 JL |
5237 | one->dirty_submodule = old_dirty_submodule; |
5238 | two->dirty_submodule = new_dirty_submodule; | |
f34b205f | 5239 | p = diff_queue(&diff_queued_diff, one, two); |
6973dcae | 5240 | |
f34b205f NTND |
5241 | if (DIFF_OPT_TST(options, DIFF_FROM_CONTENTS)) |
5242 | return; | |
5243 | ||
5244 | if (DIFF_OPT_TST(options, QUICK) && options->skip_stat_unmatch && | |
5245 | !diff_filespec_check_stat_unmatch(p)) | |
5246 | return; | |
5247 | ||
5248 | DIFF_OPT_SET(options, HAS_CHANGES); | |
6973dcae JH |
5249 | } |
5250 | ||
fa7b2908 | 5251 | struct diff_filepair *diff_unmerge(struct diff_options *options, const char *path) |
6973dcae | 5252 | { |
76399c01 | 5253 | struct diff_filepair *pair; |
6973dcae | 5254 | struct diff_filespec *one, *two; |
cd676a51 JH |
5255 | |
5256 | if (options->prefix && | |
5257 | strncmp(path, options->prefix, options->prefix_length)) | |
76399c01 | 5258 | return NULL; |
cd676a51 | 5259 | |
6973dcae JH |
5260 | one = alloc_filespec(path); |
5261 | two = alloc_filespec(path); | |
76399c01 JH |
5262 | pair = diff_queue(&diff_queued_diff, one, two); |
5263 | pair->is_unmerged = 1; | |
5264 | return pair; | |
6973dcae | 5265 | } |
9cb92c39 JK |
5266 | |
5267 | static char *run_textconv(const char *pgm, struct diff_filespec *spec, | |
5268 | size_t *outsize) | |
5269 | { | |
479b0ae8 | 5270 | struct diff_tempfile *temp; |
9cb92c39 JK |
5271 | const char *argv[3]; |
5272 | const char **arg = argv; | |
d3180279 | 5273 | struct child_process child = CHILD_PROCESS_INIT; |
9cb92c39 | 5274 | struct strbuf buf = STRBUF_INIT; |
da1fbed3 | 5275 | int err = 0; |
9cb92c39 | 5276 | |
479b0ae8 | 5277 | temp = prepare_temp_file(spec->path, spec); |
9cb92c39 | 5278 | *arg++ = pgm; |
479b0ae8 | 5279 | *arg++ = temp->name; |
9cb92c39 JK |
5280 | *arg = NULL; |
5281 | ||
41a457e4 | 5282 | child.use_shell = 1; |
9cb92c39 JK |
5283 | child.argv = argv; |
5284 | child.out = -1; | |
da1fbed3 | 5285 | if (start_command(&child)) { |
479b0ae8 | 5286 | remove_tempfile(); |
9cb92c39 JK |
5287 | return NULL; |
5288 | } | |
da1fbed3 JS |
5289 | |
5290 | if (strbuf_read(&buf, child.out, 0) < 0) | |
5291 | err = error("error reading from textconv command '%s'", pgm); | |
70d70999 | 5292 | close(child.out); |
da1fbed3 JS |
5293 | |
5294 | if (finish_command(&child) || err) { | |
5295 | strbuf_release(&buf); | |
5296 | remove_tempfile(); | |
5297 | return NULL; | |
5298 | } | |
479b0ae8 | 5299 | remove_tempfile(); |
9cb92c39 JK |
5300 | |
5301 | return strbuf_detach(&buf, outsize); | |
5302 | } | |
840383b2 | 5303 | |
a788d7d5 AB |
5304 | size_t fill_textconv(struct userdiff_driver *driver, |
5305 | struct diff_filespec *df, | |
5306 | char **outbuf) | |
840383b2 JK |
5307 | { |
5308 | size_t size; | |
5309 | ||
a64e6a44 | 5310 | if (!driver) { |
840383b2 JK |
5311 | if (!DIFF_FILE_VALID(df)) { |
5312 | *outbuf = ""; | |
5313 | return 0; | |
5314 | } | |
5315 | if (diff_populate_filespec(df, 0)) | |
5316 | die("unable to read files to diff"); | |
5317 | *outbuf = df->data; | |
5318 | return df->size; | |
5319 | } | |
5320 | ||
a64e6a44 JK |
5321 | if (!driver->textconv) |
5322 | die("BUG: fill_textconv called with non-textconv driver"); | |
5323 | ||
41c9560e | 5324 | if (driver->textconv_cache && df->oid_valid) { |
a0d12c44 | 5325 | *outbuf = notes_cache_get(driver->textconv_cache, |
569aa376 | 5326 | &df->oid, |
d9bae1a1 JK |
5327 | &size); |
5328 | if (*outbuf) | |
5329 | return size; | |
5330 | } | |
5331 | ||
5332 | *outbuf = run_textconv(driver->textconv, df, &size); | |
840383b2 JK |
5333 | if (!*outbuf) |
5334 | die("unable to read files to diff"); | |
d9bae1a1 | 5335 | |
41c9560e | 5336 | if (driver->textconv_cache && df->oid_valid) { |
d9bae1a1 | 5337 | /* ignore errors, as we might be in a readonly repository */ |
569aa376 | 5338 | notes_cache_put(driver->textconv_cache, &df->oid, *outbuf, |
d9bae1a1 JK |
5339 | size); |
5340 | /* | |
5341 | * we could save up changes and flush them all at the end, | |
5342 | * but we would need an extra call after all diffing is done. | |
5343 | * Since generating a cache entry is the slow path anyway, | |
5344 | * this extra overhead probably isn't a big deal. | |
5345 | */ | |
5346 | notes_cache_write(driver->textconv_cache); | |
5347 | } | |
5348 | ||
840383b2 JK |
5349 | return size; |
5350 | } | |
4914c962 | 5351 | |
3a35cb2e JS |
5352 | int textconv_object(const char *path, |
5353 | unsigned mode, | |
5354 | const struct object_id *oid, | |
5355 | int oid_valid, | |
5356 | char **buf, | |
5357 | unsigned long *buf_size) | |
5358 | { | |
5359 | struct diff_filespec *df; | |
5360 | struct userdiff_driver *textconv; | |
5361 | ||
5362 | df = alloc_filespec(path); | |
a6f38c10 | 5363 | fill_filespec(df, oid, oid_valid, mode); |
3a35cb2e JS |
5364 | textconv = get_textconv(df); |
5365 | if (!textconv) { | |
5366 | free_filespec(df); | |
5367 | return 0; | |
5368 | } | |
5369 | ||
5370 | *buf_size = fill_textconv(textconv, df, buf); | |
5371 | free_filespec(df); | |
5372 | return 1; | |
5373 | } | |
5374 | ||
4914c962 NTND |
5375 | void setup_diff_pager(struct diff_options *opt) |
5376 | { | |
5377 | /* | |
5378 | * If the user asked for our exit code, then either they want --quiet | |
5379 | * or --exit-code. We should definitely not bother with a pager in the | |
5380 | * former case, as we will generate no output. Since we still properly | |
5381 | * report our exit code even when a pager is run, we _could_ run a | |
5382 | * pager with --exit-code. But since we have not done so historically, | |
5383 | * and because it is easy to find people oneline advising "git diff | |
5384 | * --exit-code" in hooks and other scripts, we do not do so. | |
5385 | */ | |
5386 | if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) && | |
5387 | check_pager_config("diff") != 0) | |
5388 | setup_pager(); | |
5389 | } |