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Commit | Line | Data |
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5010cb5f JH |
1 | /* |
2 | * Builtin "git grep" | |
3 | * | |
4 | * Copyright (c) 2006 Junio C Hamano | |
5 | */ | |
6 | #include "cache.h" | |
7 | #include "blob.h" | |
8 | #include "tree.h" | |
9 | #include "commit.h" | |
10 | #include "tag.h" | |
1362671f | 11 | #include "tree-walk.h" |
5010cb5f | 12 | #include "builtin.h" |
3e230fa1 | 13 | #include "parse-options.h" |
83b5d2f5 | 14 | #include "grep.h" |
5010cb5f | 15 | |
5f7c643a JK |
16 | #ifndef NO_EXTERNAL_GREP |
17 | #ifdef __unix__ | |
18 | #define NO_EXTERNAL_GREP 0 | |
19 | #else | |
20 | #define NO_EXTERNAL_GREP 1 | |
21 | #endif | |
22 | #endif | |
23 | ||
3e230fa1 RS |
24 | static char const * const grep_usage[] = { |
25 | "git grep [options] [-e] <pattern> [<rev>...] [[--] path...]", | |
26 | NULL | |
27 | }; | |
28 | ||
7e8f59d5 RS |
29 | static int grep_config(const char *var, const char *value, void *cb) |
30 | { | |
31 | struct grep_opt *opt = cb; | |
32 | ||
fe3420b6 | 33 | if (!strcmp(var, "color.grep")) { |
7e8f59d5 RS |
34 | opt->color = git_config_colorbool(var, value, -1); |
35 | return 0; | |
36 | } | |
fe3420b6 | 37 | if (!strcmp(var, "color.grep.external")) |
a94982ef | 38 | return git_config_string(&(opt->color_external), var, value); |
fe3420b6 | 39 | if (!strcmp(var, "color.grep.match")) { |
7e8f59d5 RS |
40 | if (!value) |
41 | return config_error_nonbool(var); | |
42 | color_parse(value, var, opt->color_match); | |
43 | return 0; | |
44 | } | |
45 | return git_color_default_config(var, value, cb); | |
46 | } | |
47 | ||
e0eb889f JH |
48 | /* |
49 | * git grep pathspecs are somewhat different from diff-tree pathspecs; | |
50 | * pathname wildcards are allowed. | |
51 | */ | |
1362671f | 52 | static int pathspec_matches(const char **paths, const char *name) |
5010cb5f | 53 | { |
e0eb889f | 54 | int namelen, i; |
1362671f | 55 | if (!paths || !*paths) |
5010cb5f JH |
56 | return 1; |
57 | namelen = strlen(name); | |
1362671f JH |
58 | for (i = 0; paths[i]; i++) { |
59 | const char *match = paths[i]; | |
60 | int matchlen = strlen(match); | |
1e3d90e0 | 61 | const char *cp, *meta; |
e0eb889f | 62 | |
bb9e15a8 UKK |
63 | if (!matchlen || |
64 | ((matchlen <= namelen) && | |
65 | !strncmp(name, match, matchlen) && | |
66 | (match[matchlen-1] == '/' || | |
67 | name[matchlen] == '\0' || name[matchlen] == '/'))) | |
e0eb889f JH |
68 | return 1; |
69 | if (!fnmatch(match, name, 0)) | |
70 | return 1; | |
71 | if (name[namelen-1] != '/') | |
5010cb5f | 72 | continue; |
e0eb889f | 73 | |
1e3d90e0 | 74 | /* We are being asked if the directory ("name") is worth |
e0eb889f JH |
75 | * descending into. |
76 | * | |
77 | * Find the longest leading directory name that does | |
78 | * not have metacharacter in the pathspec; the name | |
79 | * we are looking at must overlap with that directory. | |
5010cb5f | 80 | */ |
1e3d90e0 | 81 | for (cp = match, meta = NULL; cp - match < matchlen; cp++) { |
e0eb889f | 82 | char ch = *cp; |
1e3d90e0 JH |
83 | if (ch == '*' || ch == '[' || ch == '?') { |
84 | meta = cp; | |
5010cb5f | 85 | break; |
1e3d90e0 | 86 | } |
e0eb889f | 87 | } |
1e3d90e0 JH |
88 | if (!meta) |
89 | meta = cp; /* fully literal */ | |
90 | ||
91 | if (namelen <= meta - match) { | |
e0eb889f JH |
92 | /* Looking at "Documentation/" and |
93 | * the pattern says "Documentation/howto/", or | |
1e3d90e0 JH |
94 | * "Documentation/diff*.txt". The name we |
95 | * have should match prefix. | |
e0eb889f JH |
96 | */ |
97 | if (!memcmp(match, name, namelen)) | |
98 | return 1; | |
1e3d90e0 | 99 | continue; |
e0eb889f | 100 | } |
1e3d90e0 JH |
101 | |
102 | if (meta - match < namelen) { | |
e0eb889f | 103 | /* Looking at "Documentation/howto/" and |
1e3d90e0 JH |
104 | * the pattern says "Documentation/h*"; |
105 | * match up to "Do.../h"; this avoids descending | |
106 | * into "Documentation/technical/". | |
e0eb889f | 107 | */ |
1e3d90e0 | 108 | if (!memcmp(match, name, meta - match)) |
e0eb889f | 109 | return 1; |
1e3d90e0 | 110 | continue; |
e0eb889f | 111 | } |
5010cb5f JH |
112 | } |
113 | return 0; | |
114 | } | |
115 | ||
0d042fec | 116 | static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char *name, int tree_name_len) |
5010cb5f JH |
117 | { |
118 | unsigned long size; | |
119 | char *data; | |
21666f1a | 120 | enum object_type type; |
0d042fec | 121 | char *to_free = NULL; |
5010cb5f | 122 | int hit; |
0d042fec | 123 | |
21666f1a | 124 | data = read_sha1_file(sha1, &type, &size); |
5010cb5f JH |
125 | if (!data) { |
126 | error("'%s': unable to read %s", name, sha1_to_hex(sha1)); | |
127 | return 0; | |
128 | } | |
0d042fec JH |
129 | if (opt->relative && opt->prefix_length) { |
130 | static char name_buf[PATH_MAX]; | |
131 | char *cp; | |
132 | int name_len = strlen(name) - opt->prefix_length + 1; | |
133 | ||
134 | if (!tree_name_len) | |
135 | name += opt->prefix_length; | |
136 | else { | |
137 | if (ARRAY_SIZE(name_buf) <= name_len) | |
138 | cp = to_free = xmalloc(name_len); | |
139 | else | |
140 | cp = name_buf; | |
141 | memcpy(cp, name, tree_name_len); | |
142 | strcpy(cp + tree_name_len, | |
143 | name + tree_name_len + opt->prefix_length); | |
144 | name = cp; | |
145 | } | |
146 | } | |
5010cb5f JH |
147 | hit = grep_buffer(opt, name, data, size); |
148 | free(data); | |
0d042fec | 149 | free(to_free); |
5010cb5f JH |
150 | return hit; |
151 | } | |
152 | ||
153 | static int grep_file(struct grep_opt *opt, const char *filename) | |
154 | { | |
155 | struct stat st; | |
156 | int i; | |
157 | char *data; | |
dc49cd76 SP |
158 | size_t sz; |
159 | ||
5010cb5f JH |
160 | if (lstat(filename, &st) < 0) { |
161 | err_ret: | |
162 | if (errno != ENOENT) | |
163 | error("'%s': %s", filename, strerror(errno)); | |
164 | return 0; | |
165 | } | |
166 | if (!st.st_size) | |
167 | return 0; /* empty file -- no grep hit */ | |
168 | if (!S_ISREG(st.st_mode)) | |
169 | return 0; | |
dc49cd76 | 170 | sz = xsize_t(st.st_size); |
5010cb5f JH |
171 | i = open(filename, O_RDONLY); |
172 | if (i < 0) | |
173 | goto err_ret; | |
dc49cd76 SP |
174 | data = xmalloc(sz + 1); |
175 | if (st.st_size != read_in_full(i, data, sz)) { | |
5010cb5f JH |
176 | error("'%s': short read %s", filename, strerror(errno)); |
177 | close(i); | |
178 | free(data); | |
179 | return 0; | |
180 | } | |
181 | close(i); | |
0d042fec JH |
182 | if (opt->relative && opt->prefix_length) |
183 | filename += opt->prefix_length; | |
dc49cd76 | 184 | i = grep_buffer(opt, filename, data, sz); |
5010cb5f JH |
185 | free(data); |
186 | return i; | |
187 | } | |
188 | ||
5f7c643a | 189 | #if !NO_EXTERNAL_GREP |
1e2398d7 LT |
190 | static int exec_grep(int argc, const char **argv) |
191 | { | |
192 | pid_t pid; | |
193 | int status; | |
194 | ||
195 | argv[argc] = NULL; | |
196 | pid = fork(); | |
197 | if (pid < 0) | |
198 | return pid; | |
199 | if (!pid) { | |
200 | execvp("grep", (char **) argv); | |
201 | exit(255); | |
202 | } | |
203 | while (waitpid(pid, &status, 0) < 0) { | |
204 | if (errno == EINTR) | |
205 | continue; | |
206 | return -1; | |
207 | } | |
208 | if (WIFEXITED(status)) { | |
209 | if (!WEXITSTATUS(status)) | |
210 | return 1; | |
211 | return 0; | |
212 | } | |
213 | return -1; | |
214 | } | |
215 | ||
216 | #define MAXARGS 1000 | |
ffa0a7ab JH |
217 | #define ARGBUF 4096 |
218 | #define push_arg(a) do { \ | |
219 | if (nr < MAXARGS) argv[nr++] = (a); \ | |
220 | else die("maximum number of args exceeded"); \ | |
221 | } while (0) | |
1e2398d7 | 222 | |
d99ebf08 JH |
223 | /* |
224 | * If you send a singleton filename to grep, it does not give | |
225 | * the name of the file. GNU grep has "-H" but we would want | |
226 | * that behaviour in a portable way. | |
227 | * | |
228 | * So we keep two pathnames in argv buffer unsent to grep in | |
229 | * the main loop if we need to do more than one grep. | |
230 | */ | |
231 | static int flush_grep(struct grep_opt *opt, | |
232 | int argc, int arg0, const char **argv, int *kept) | |
233 | { | |
234 | int status; | |
235 | int count = argc - arg0; | |
236 | const char *kept_0 = NULL; | |
237 | ||
238 | if (count <= 2) { | |
239 | /* | |
240 | * Because we keep at least 2 paths in the call from | |
241 | * the main loop (i.e. kept != NULL), and MAXARGS is | |
242 | * far greater than 2, this usually is a call to | |
243 | * conclude the grep. However, the user could attempt | |
244 | * to overflow the argv buffer by giving too many | |
245 | * options to leave very small number of real | |
246 | * arguments even for the call in the main loop. | |
247 | */ | |
248 | if (kept) | |
249 | die("insanely many options to grep"); | |
250 | ||
251 | /* | |
252 | * If we have two or more paths, we do not have to do | |
253 | * anything special, but we need to push /dev/null to | |
254 | * get "-H" behaviour of GNU grep portably but when we | |
255 | * are not doing "-l" nor "-L" nor "-c". | |
256 | */ | |
257 | if (count == 1 && | |
258 | !opt->name_only && | |
259 | !opt->unmatch_name_only && | |
260 | !opt->count) { | |
261 | argv[argc++] = "/dev/null"; | |
262 | argv[argc] = NULL; | |
263 | } | |
264 | } | |
265 | ||
266 | else if (kept) { | |
267 | /* | |
268 | * Called because we found many paths and haven't finished | |
269 | * iterating over the cache yet. We keep two paths | |
270 | * for the concluding call. argv[argc-2] and argv[argc-1] | |
271 | * has the last two paths, so save the first one away, | |
272 | * replace it with NULL while sending the list to grep, | |
273 | * and recover them after we are done. | |
274 | */ | |
275 | *kept = 2; | |
276 | kept_0 = argv[argc-2]; | |
277 | argv[argc-2] = NULL; | |
278 | argc -= 2; | |
279 | } | |
280 | ||
281 | status = exec_grep(argc, argv); | |
282 | ||
283 | if (kept_0) { | |
284 | /* | |
285 | * Then recover them. Now the last arg is beyond the | |
286 | * terminating NULL which is at argc, and the second | |
287 | * from the last is what we saved away in kept_0 | |
288 | */ | |
289 | argv[arg0++] = kept_0; | |
290 | argv[arg0] = argv[argc+1]; | |
291 | } | |
292 | return status; | |
293 | } | |
294 | ||
a94982ef RS |
295 | static void grep_add_color(struct strbuf *sb, const char *escape_seq) |
296 | { | |
297 | size_t orig_len = sb->len; | |
298 | ||
299 | while (*escape_seq) { | |
300 | if (*escape_seq == 'm') | |
301 | strbuf_addch(sb, ';'); | |
302 | else if (*escape_seq != '\033' && *escape_seq != '[') | |
303 | strbuf_addch(sb, *escape_seq); | |
304 | escape_seq++; | |
305 | } | |
306 | if (sb->len > orig_len && sb->buf[sb->len - 1] == ';') | |
307 | strbuf_setlen(sb, sb->len - 1); | |
308 | } | |
309 | ||
1e2398d7 LT |
310 | static int external_grep(struct grep_opt *opt, const char **paths, int cached) |
311 | { | |
fcfe34b5 | 312 | int i, nr, argc, hit, len, status; |
1e2398d7 | 313 | const char *argv[MAXARGS+1]; |
ffa0a7ab JH |
314 | char randarg[ARGBUF]; |
315 | char *argptr = randarg; | |
1e2398d7 LT |
316 | struct grep_pat *p; |
317 | ||
0d042fec | 318 | if (opt->extended || (opt->relative && opt->prefix_length)) |
79d3696c | 319 | return -1; |
ffa0a7ab JH |
320 | len = nr = 0; |
321 | push_arg("grep"); | |
ffa0a7ab | 322 | if (opt->fixed) |
f6647519 | 323 | push_arg("-F"); |
ffa0a7ab JH |
324 | if (opt->linenum) |
325 | push_arg("-n"); | |
7977f0ea LT |
326 | if (!opt->pathname) |
327 | push_arg("-h"); | |
ffa0a7ab JH |
328 | if (opt->regflags & REG_EXTENDED) |
329 | push_arg("-E"); | |
3026402c RF |
330 | if (opt->regflags & REG_ICASE) |
331 | push_arg("-i"); | |
bc395643 JH |
332 | if (opt->binary == GREP_BINARY_NOMATCH) |
333 | push_arg("-I"); | |
1e2398d7 | 334 | if (opt->word_regexp) |
ffa0a7ab | 335 | push_arg("-w"); |
1e2398d7 | 336 | if (opt->name_only) |
ffa0a7ab JH |
337 | push_arg("-l"); |
338 | if (opt->unmatch_name_only) | |
339 | push_arg("-L"); | |
83caecca RZ |
340 | if (opt->null_following_name) |
341 | /* in GNU grep git's "-z" translates to "-Z" */ | |
342 | push_arg("-Z"); | |
ffa0a7ab JH |
343 | if (opt->count) |
344 | push_arg("-c"); | |
345 | if (opt->post_context || opt->pre_context) { | |
346 | if (opt->post_context != opt->pre_context) { | |
347 | if (opt->pre_context) { | |
348 | push_arg("-B"); | |
349 | len += snprintf(argptr, sizeof(randarg)-len, | |
4b87474b | 350 | "%u", opt->pre_context) + 1; |
ffa0a7ab JH |
351 | if (sizeof(randarg) <= len) |
352 | die("maximum length of args exceeded"); | |
353 | push_arg(argptr); | |
354 | argptr += len; | |
355 | } | |
356 | if (opt->post_context) { | |
357 | push_arg("-A"); | |
358 | len += snprintf(argptr, sizeof(randarg)-len, | |
4b87474b | 359 | "%u", opt->post_context) + 1; |
ffa0a7ab JH |
360 | if (sizeof(randarg) <= len) |
361 | die("maximum length of args exceeded"); | |
362 | push_arg(argptr); | |
363 | argptr += len; | |
364 | } | |
365 | } | |
366 | else { | |
367 | push_arg("-C"); | |
368 | len += snprintf(argptr, sizeof(randarg)-len, | |
4b87474b | 369 | "%u", opt->post_context) + 1; |
ffa0a7ab JH |
370 | if (sizeof(randarg) <= len) |
371 | die("maximum length of args exceeded"); | |
372 | push_arg(argptr); | |
373 | argptr += len; | |
374 | } | |
375 | } | |
1e2398d7 | 376 | for (p = opt->pattern_list; p; p = p->next) { |
ffa0a7ab JH |
377 | push_arg("-e"); |
378 | push_arg(p->pattern); | |
1e2398d7 | 379 | } |
a94982ef RS |
380 | if (opt->color) { |
381 | struct strbuf sb = STRBUF_INIT; | |
382 | ||
383 | grep_add_color(&sb, opt->color_match); | |
384 | setenv("GREP_COLOR", sb.buf, 1); | |
385 | ||
386 | strbuf_reset(&sb); | |
387 | strbuf_addstr(&sb, "mt="); | |
388 | grep_add_color(&sb, opt->color_match); | |
389 | strbuf_addstr(&sb, ":sl=:cx=:fn=:ln=:bn=:se="); | |
390 | setenv("GREP_COLORS", sb.buf, 1); | |
391 | ||
392 | strbuf_release(&sb); | |
393 | ||
394 | if (opt->color_external && strlen(opt->color_external) > 0) | |
395 | push_arg(opt->color_external); | |
396 | } | |
bbb66c60 | 397 | |
1e2398d7 LT |
398 | hit = 0; |
399 | argc = nr; | |
400 | for (i = 0; i < active_nr; i++) { | |
401 | struct cache_entry *ce = active_cache[i]; | |
fbd01abf | 402 | char *name; |
d99ebf08 | 403 | int kept; |
7a51ed66 | 404 | if (!S_ISREG(ce->ce_mode)) |
1e2398d7 LT |
405 | continue; |
406 | if (!pathspec_matches(paths, ce->name)) | |
407 | continue; | |
bbb66c60 LT |
408 | name = ce->name; |
409 | if (name[0] == '-') { | |
410 | int len = ce_namelen(ce); | |
411 | name = xmalloc(len + 3); | |
412 | memcpy(name, "./", 2); | |
413 | memcpy(name + 2, ce->name, len + 1); | |
414 | } | |
415 | argv[argc++] = name; | |
6326cee5 JH |
416 | if (MAXARGS <= argc) { |
417 | status = flush_grep(opt, argc, nr, argv, &kept); | |
418 | if (0 < status) | |
419 | hit = 1; | |
420 | argc = nr + kept; | |
421 | } | |
36f2587f JH |
422 | if (ce_stage(ce)) { |
423 | do { | |
424 | i++; | |
425 | } while (i < active_nr && | |
426 | !strcmp(ce->name, active_cache[i]->name)); | |
427 | i--; /* compensate for loop control */ | |
428 | } | |
1e2398d7 | 429 | } |
fcfe34b5 | 430 | if (argc > nr) { |
d99ebf08 | 431 | status = flush_grep(opt, argc, nr, argv, NULL); |
fcfe34b5 JH |
432 | if (0 < status) |
433 | hit = 1; | |
434 | } | |
435 | return hit; | |
1e2398d7 | 436 | } |
ff1f9945 | 437 | #endif |
1e2398d7 | 438 | |
1b5fb44a RS |
439 | static int grep_cache(struct grep_opt *opt, const char **paths, int cached, |
440 | int external_grep_allowed) | |
5010cb5f JH |
441 | { |
442 | int hit = 0; | |
443 | int nr; | |
444 | read_cache(); | |
445 | ||
5f7c643a | 446 | #if !NO_EXTERNAL_GREP |
1e2398d7 LT |
447 | /* |
448 | * Use the external "grep" command for the case where | |
449 | * we grep through the checked-out files. It tends to | |
450 | * be a lot more optimized | |
451 | */ | |
1b5fb44a | 452 | if (!cached && external_grep_allowed) { |
1e2398d7 LT |
453 | hit = external_grep(opt, paths, cached); |
454 | if (hit >= 0) | |
455 | return hit; | |
456 | } | |
457 | #endif | |
458 | ||
5010cb5f JH |
459 | for (nr = 0; nr < active_nr; nr++) { |
460 | struct cache_entry *ce = active_cache[nr]; | |
7a51ed66 | 461 | if (!S_ISREG(ce->ce_mode)) |
5010cb5f | 462 | continue; |
1362671f | 463 | if (!pathspec_matches(paths, ce->name)) |
5010cb5f | 464 | continue; |
57d43466 NTND |
465 | /* |
466 | * If CE_VALID is on, we assume worktree file and its cache entry | |
467 | * are identical, even if worktree file has been modified, so use | |
468 | * cache version instead | |
469 | */ | |
470 | if (cached || (ce->ce_flags & CE_VALID)) { | |
36f2587f JH |
471 | if (ce_stage(ce)) |
472 | continue; | |
0d042fec | 473 | hit |= grep_sha1(opt, ce->sha1, ce->name, 0); |
36f2587f | 474 | } |
5010cb5f JH |
475 | else |
476 | hit |= grep_file(opt, ce->name); | |
36f2587f JH |
477 | if (ce_stage(ce)) { |
478 | do { | |
479 | nr++; | |
480 | } while (nr < active_nr && | |
481 | !strcmp(ce->name, active_cache[nr]->name)); | |
482 | nr--; /* compensate for loop control */ | |
483 | } | |
5010cb5f | 484 | } |
b48fb5b6 | 485 | free_grep_patterns(opt); |
5010cb5f JH |
486 | return hit; |
487 | } | |
488 | ||
1362671f | 489 | static int grep_tree(struct grep_opt *opt, const char **paths, |
5010cb5f JH |
490 | struct tree_desc *tree, |
491 | const char *tree_name, const char *base) | |
492 | { | |
5010cb5f JH |
493 | int len; |
494 | int hit = 0; | |
4c068a98 | 495 | struct name_entry entry; |
e0eb889f | 496 | char *down; |
0d042fec | 497 | int tn_len = strlen(tree_name); |
620e2bb9 DP |
498 | struct strbuf pathbuf; |
499 | ||
500 | strbuf_init(&pathbuf, PATH_MAX + tn_len); | |
5010cb5f | 501 | |
0d042fec | 502 | if (tn_len) { |
620e2bb9 DP |
503 | strbuf_add(&pathbuf, tree_name, tn_len); |
504 | strbuf_addch(&pathbuf, ':'); | |
505 | tn_len = pathbuf.len; | |
5010cb5f | 506 | } |
620e2bb9 DP |
507 | strbuf_addstr(&pathbuf, base); |
508 | len = pathbuf.len; | |
5010cb5f | 509 | |
4c068a98 | 510 | while (tree_entry(tree, &entry)) { |
620e2bb9 DP |
511 | int te_len = tree_entry_len(entry.path, entry.sha1); |
512 | pathbuf.len = len; | |
513 | strbuf_add(&pathbuf, entry.path, te_len); | |
5010cb5f | 514 | |
4c068a98 | 515 | if (S_ISDIR(entry.mode)) |
e0eb889f JH |
516 | /* Match "abc/" against pathspec to |
517 | * decide if we want to descend into "abc" | |
518 | * directory. | |
519 | */ | |
620e2bb9 | 520 | strbuf_addch(&pathbuf, '/'); |
e0eb889f | 521 | |
620e2bb9 | 522 | down = pathbuf.buf + tn_len; |
1362671f | 523 | if (!pathspec_matches(paths, down)) |
5010cb5f | 524 | ; |
4c068a98 | 525 | else if (S_ISREG(entry.mode)) |
620e2bb9 | 526 | hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len); |
4c068a98 | 527 | else if (S_ISDIR(entry.mode)) { |
21666f1a | 528 | enum object_type type; |
5010cb5f JH |
529 | struct tree_desc sub; |
530 | void *data; | |
6fda5e51 LT |
531 | unsigned long size; |
532 | ||
533 | data = read_sha1_file(entry.sha1, &type, &size); | |
5010cb5f JH |
534 | if (!data) |
535 | die("unable to read tree (%s)", | |
4c068a98 | 536 | sha1_to_hex(entry.sha1)); |
6fda5e51 | 537 | init_tree_desc(&sub, data, size); |
1362671f | 538 | hit |= grep_tree(opt, paths, &sub, tree_name, down); |
5010cb5f JH |
539 | free(data); |
540 | } | |
5010cb5f | 541 | } |
620e2bb9 | 542 | strbuf_release(&pathbuf); |
5010cb5f JH |
543 | return hit; |
544 | } | |
545 | ||
1362671f | 546 | static int grep_object(struct grep_opt *opt, const char **paths, |
5010cb5f JH |
547 | struct object *obj, const char *name) |
548 | { | |
1974632c | 549 | if (obj->type == OBJ_BLOB) |
0d042fec | 550 | return grep_sha1(opt, obj->sha1, name, 0); |
1974632c | 551 | if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) { |
5010cb5f JH |
552 | struct tree_desc tree; |
553 | void *data; | |
6fda5e51 | 554 | unsigned long size; |
5010cb5f JH |
555 | int hit; |
556 | data = read_object_with_reference(obj->sha1, tree_type, | |
6fda5e51 | 557 | &size, NULL); |
5010cb5f JH |
558 | if (!data) |
559 | die("unable to read tree (%s)", sha1_to_hex(obj->sha1)); | |
6fda5e51 | 560 | init_tree_desc(&tree, data, size); |
1362671f | 561 | hit = grep_tree(opt, paths, &tree, name, ""); |
5010cb5f JH |
562 | free(data); |
563 | return hit; | |
564 | } | |
885a86ab | 565 | die("unable to grep from object of type %s", typename(obj->type)); |
5010cb5f JH |
566 | } |
567 | ||
3e230fa1 RS |
568 | int context_callback(const struct option *opt, const char *arg, int unset) |
569 | { | |
570 | struct grep_opt *grep_opt = opt->value; | |
571 | int value; | |
572 | const char *endp; | |
573 | ||
574 | if (unset) { | |
575 | grep_opt->pre_context = grep_opt->post_context = 0; | |
576 | return 0; | |
577 | } | |
578 | value = strtol(arg, (char **)&endp, 10); | |
579 | if (*endp) { | |
580 | return error("switch `%c' expects a numerical value", | |
581 | opt->short_name); | |
582 | } | |
583 | grep_opt->pre_context = grep_opt->post_context = value; | |
584 | return 0; | |
585 | } | |
586 | ||
587 | int file_callback(const struct option *opt, const char *arg, int unset) | |
588 | { | |
589 | struct grep_opt *grep_opt = opt->value; | |
590 | FILE *patterns; | |
591 | int lno = 0; | |
592 | struct strbuf sb; | |
593 | ||
594 | patterns = fopen(arg, "r"); | |
595 | if (!patterns) | |
596 | die("'%s': %s", arg, strerror(errno)); | |
597 | while (strbuf_getline(&sb, patterns, '\n') == 0) { | |
598 | /* ignore empty line like grep does */ | |
599 | if (sb.len == 0) | |
600 | continue; | |
601 | append_grep_pattern(grep_opt, strbuf_detach(&sb, NULL), arg, | |
602 | ++lno, GREP_PATTERN); | |
603 | } | |
604 | fclose(patterns); | |
605 | strbuf_release(&sb); | |
606 | return 0; | |
607 | } | |
608 | ||
609 | int not_callback(const struct option *opt, const char *arg, int unset) | |
610 | { | |
611 | struct grep_opt *grep_opt = opt->value; | |
612 | append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT); | |
613 | return 0; | |
614 | } | |
615 | ||
616 | int and_callback(const struct option *opt, const char *arg, int unset) | |
617 | { | |
618 | struct grep_opt *grep_opt = opt->value; | |
619 | append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND); | |
620 | return 0; | |
621 | } | |
622 | ||
623 | int open_callback(const struct option *opt, const char *arg, int unset) | |
624 | { | |
625 | struct grep_opt *grep_opt = opt->value; | |
626 | append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN); | |
627 | return 0; | |
628 | } | |
629 | ||
630 | int close_callback(const struct option *opt, const char *arg, int unset) | |
631 | { | |
632 | struct grep_opt *grep_opt = opt->value; | |
633 | append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN); | |
634 | return 0; | |
635 | } | |
636 | ||
637 | int pattern_callback(const struct option *opt, const char *arg, int unset) | |
638 | { | |
639 | struct grep_opt *grep_opt = opt->value; | |
640 | append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN); | |
641 | return 0; | |
642 | } | |
5010cb5f | 643 | |
3e230fa1 RS |
644 | int help_callback(const struct option *opt, const char *arg, int unset) |
645 | { | |
646 | return -1; | |
647 | } | |
088b084b | 648 | |
a633fca0 | 649 | int cmd_grep(int argc, const char **argv, const char *prefix) |
5010cb5f | 650 | { |
5010cb5f | 651 | int hit = 0; |
5010cb5f | 652 | int cached = 0; |
1b5fb44a | 653 | int external_grep_allowed = 1; |
5acd64ed | 654 | int seen_dashdash = 0; |
5010cb5f | 655 | struct grep_opt opt; |
1f1e895f | 656 | struct object_array list = { 0, 0, NULL }; |
1362671f | 657 | const char **paths = NULL; |
5acd64ed | 658 | int i; |
3e230fa1 RS |
659 | int dummy; |
660 | struct option options[] = { | |
661 | OPT_BOOLEAN(0, "cached", &cached, | |
662 | "search in index instead of in the work tree"), | |
663 | OPT_GROUP(""), | |
664 | OPT_BOOLEAN('v', "invert-match", &opt.invert, | |
665 | "show non-matching lines"), | |
666 | OPT_BIT('i', "ignore-case", &opt.regflags, | |
667 | "case insensitive matching", REG_ICASE), | |
668 | OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp, | |
669 | "match patterns only at word boundaries"), | |
670 | OPT_SET_INT('a', "text", &opt.binary, | |
671 | "process binary files as text", GREP_BINARY_TEXT), | |
672 | OPT_SET_INT('I', NULL, &opt.binary, | |
673 | "don't match patterns in binary files", | |
674 | GREP_BINARY_NOMATCH), | |
675 | OPT_GROUP(""), | |
676 | OPT_BIT('E', "extended-regexp", &opt.regflags, | |
677 | "use extended POSIX regular expressions", REG_EXTENDED), | |
678 | OPT_NEGBIT('G', "basic-regexp", &opt.regflags, | |
679 | "use basic POSIX regular expressions (default)", | |
680 | REG_EXTENDED), | |
681 | OPT_BOOLEAN('F', "fixed-strings", &opt.fixed, | |
682 | "interpret patterns as fixed strings"), | |
683 | OPT_GROUP(""), | |
684 | OPT_BOOLEAN('n', NULL, &opt.linenum, "show line numbers"), | |
685 | OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1), | |
686 | OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1), | |
687 | OPT_NEGBIT(0, "full-name", &opt.relative, | |
688 | "show filenames relative to top directory", 1), | |
689 | OPT_BOOLEAN('l', "files-with-matches", &opt.name_only, | |
690 | "show only filenames instead of matching lines"), | |
691 | OPT_BOOLEAN(0, "name-only", &opt.name_only, | |
692 | "synonym for --files-with-matches"), | |
693 | OPT_BOOLEAN('L', "files-without-match", | |
694 | &opt.unmatch_name_only, | |
695 | "show only the names of files without match"), | |
696 | OPT_BOOLEAN('z', "null", &opt.null_following_name, | |
697 | "print NUL after filenames"), | |
698 | OPT_BOOLEAN('c', "count", &opt.count, | |
699 | "show the number of matches instead of matching lines"), | |
700 | OPT_SET_INT(0, "color", &opt.color, "highlight matches", 1), | |
701 | OPT_GROUP(""), | |
702 | OPT_CALLBACK('C', NULL, &opt, "n", | |
703 | "show <n> context lines before and after matches", | |
704 | context_callback), | |
705 | OPT_INTEGER('B', NULL, &opt.pre_context, | |
706 | "show <n> context lines before matches"), | |
707 | OPT_INTEGER('A', NULL, &opt.post_context, | |
708 | "show <n> context lines after matches"), | |
709 | OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM", | |
710 | context_callback), | |
711 | OPT_GROUP(""), | |
712 | OPT_CALLBACK('f', NULL, &opt, "file", | |
713 | "read patterns from file", file_callback), | |
714 | { OPTION_CALLBACK, 'e', NULL, &opt, "pattern", | |
715 | "match <pattern>", PARSE_OPT_NONEG, pattern_callback }, | |
716 | { OPTION_CALLBACK, 0, "and", &opt, NULL, | |
717 | "combine patterns specified with -e", | |
718 | PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback }, | |
719 | OPT_BOOLEAN(0, "or", &dummy, ""), | |
720 | { OPTION_CALLBACK, 0, "not", &opt, NULL, "", | |
721 | PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback }, | |
722 | { OPTION_CALLBACK, '(', NULL, &opt, NULL, "", | |
723 | PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH, | |
724 | open_callback }, | |
725 | { OPTION_CALLBACK, ')', NULL, &opt, NULL, "", | |
726 | PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH, | |
727 | close_callback }, | |
728 | OPT_BOOLEAN(0, "all-match", &opt.all_match, | |
729 | "show only matches from files that match all patterns"), | |
730 | OPT_GROUP(""), | |
731 | #if NO_EXTERNAL_GREP | |
732 | OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed, | |
733 | "allow calling of grep(1) (ignored by this build)"), | |
734 | #else | |
735 | OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed, | |
736 | "allow calling of grep(1) (default)"), | |
737 | #endif | |
738 | { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage", | |
739 | PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback }, | |
740 | OPT_END() | |
741 | }; | |
5010cb5f JH |
742 | |
743 | memset(&opt, 0, sizeof(opt)); | |
0d042fec JH |
744 | opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; |
745 | opt.relative = 1; | |
7977f0ea | 746 | opt.pathname = 1; |
f9b9faf6 | 747 | opt.pattern_tail = &opt.pattern_list; |
5010cb5f JH |
748 | opt.regflags = REG_NEWLINE; |
749 | ||
7e8f59d5 RS |
750 | strcpy(opt.color_match, GIT_COLOR_RED GIT_COLOR_BOLD); |
751 | opt.color = -1; | |
752 | git_config(grep_config, &opt); | |
753 | if (opt.color == -1) | |
754 | opt.color = git_use_color_default; | |
755 | ||
5010cb5f | 756 | /* |
5acd64ed JH |
757 | * If there is no -- then the paths must exist in the working |
758 | * tree. If there is no explicit pattern specified with -e or | |
759 | * -f, we take the first unrecognized non option to be the | |
760 | * pattern, but then what follows it must be zero or more | |
761 | * valid refs up to the -- (if exists), and then existing | |
762 | * paths. If there is an explicit pattern, then the first | |
82e5a82f | 763 | * unrecognized non option is the beginning of the refs list |
5acd64ed | 764 | * that continues up to the -- (if exists), and then paths. |
5010cb5f | 765 | */ |
3e230fa1 RS |
766 | argc = parse_options(argc, argv, options, grep_usage, |
767 | PARSE_OPT_KEEP_DASHDASH | | |
768 | PARSE_OPT_STOP_AT_NON_OPTION | | |
769 | PARSE_OPT_NO_INTERNAL_HELP); | |
770 | ||
771 | /* First unrecognized non-option token */ | |
772 | if (argc > 0 && !opt.pattern_list) { | |
773 | append_grep_pattern(&opt, argv[0], "command line", 0, | |
774 | GREP_PATTERN); | |
775 | argv++; | |
776 | argc--; | |
5010cb5f | 777 | } |
5acd64ed | 778 | |
6e89ec0f | 779 | if (opt.color && !opt.color_external) |
1b5fb44a | 780 | external_grep_allowed = 0; |
f9b9faf6 | 781 | if (!opt.pattern_list) |
5010cb5f | 782 | die("no pattern given."); |
07ea91d8 JH |
783 | if ((opt.regflags != REG_NEWLINE) && opt.fixed) |
784 | die("cannot mix --fixed-strings and regexp"); | |
83b5d2f5 | 785 | compile_grep_patterns(&opt); |
5acd64ed JH |
786 | |
787 | /* Check revs and then paths */ | |
3e230fa1 | 788 | for (i = 0; i < argc; i++) { |
5acd64ed | 789 | const char *arg = argv[i]; |
1362671f | 790 | unsigned char sha1[20]; |
5acd64ed JH |
791 | /* Is it a rev? */ |
792 | if (!get_sha1(arg, sha1)) { | |
793 | struct object *object = parse_object(sha1); | |
5acd64ed JH |
794 | if (!object) |
795 | die("bad object %s", arg); | |
1f1e895f | 796 | add_object_array(object, arg, &list); |
5acd64ed JH |
797 | continue; |
798 | } | |
799 | if (!strcmp(arg, "--")) { | |
800 | i++; | |
801 | seen_dashdash = 1; | |
802 | } | |
803 | break; | |
1362671f | 804 | } |
5acd64ed JH |
805 | |
806 | /* The rest are paths */ | |
807 | if (!seen_dashdash) { | |
808 | int j; | |
c39c4f47 | 809 | for (j = i; j < argc; j++) |
5acd64ed JH |
810 | verify_filename(prefix, argv[j]); |
811 | } | |
812 | ||
0d042fec | 813 | if (i < argc) { |
5acd64ed | 814 | paths = get_pathspec(prefix, argv + i); |
0d042fec JH |
815 | if (opt.prefix_length && opt.relative) { |
816 | /* Make sure we do not get outside of paths */ | |
817 | for (i = 0; paths[i]; i++) | |
818 | if (strncmp(prefix, paths[i], opt.prefix_length)) | |
7e44c935 | 819 | die("git grep: cannot generate relative filenames containing '..'"); |
0d042fec JH |
820 | } |
821 | } | |
1362671f JH |
822 | else if (prefix) { |
823 | paths = xcalloc(2, sizeof(const char *)); | |
824 | paths[0] = prefix; | |
825 | paths[1] = NULL; | |
826 | } | |
5010cb5f | 827 | |
6577f542 NTND |
828 | if (!list.nr) { |
829 | if (!cached) | |
830 | setup_work_tree(); | |
1b5fb44a | 831 | return !grep_cache(&opt, paths, cached, external_grep_allowed); |
6577f542 | 832 | } |
aa8c79ad | 833 | |
5010cb5f | 834 | if (cached) |
aa8c79ad | 835 | die("both --cached and trees are given."); |
5010cb5f | 836 | |
1f1e895f | 837 | for (i = 0; i < list.nr; i++) { |
5010cb5f | 838 | struct object *real_obj; |
1f1e895f LT |
839 | real_obj = deref_tag(list.objects[i].item, NULL, 0); |
840 | if (grep_object(&opt, paths, real_obj, list.objects[i].name)) | |
5010cb5f JH |
841 | hit = 1; |
842 | } | |
b48fb5b6 | 843 | free_grep_patterns(&opt); |
5010cb5f JH |
844 | return !hit; |
845 | } |