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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" |
83b5d2f5 | 13 | #include "grep.h" |
5010cb5f | 14 | |
5f7c643a JK |
15 | #ifndef NO_EXTERNAL_GREP |
16 | #ifdef __unix__ | |
17 | #define NO_EXTERNAL_GREP 0 | |
18 | #else | |
19 | #define NO_EXTERNAL_GREP 1 | |
20 | #endif | |
21 | #endif | |
22 | ||
e70b9a8b NTND |
23 | static int builtin_grep; |
24 | ||
7e8f59d5 RS |
25 | static int grep_config(const char *var, const char *value, void *cb) |
26 | { | |
27 | struct grep_opt *opt = cb; | |
28 | ||
29 | if (!strcmp(var, "grep.color") || !strcmp(var, "color.grep")) { | |
30 | opt->color = git_config_colorbool(var, value, -1); | |
31 | return 0; | |
32 | } | |
a94982ef RS |
33 | if (!strcmp(var, "grep.color.external") || |
34 | !strcmp(var, "color.grep.external")) { | |
35 | return git_config_string(&(opt->color_external), var, value); | |
36 | } | |
7e8f59d5 RS |
37 | if (!strcmp(var, "grep.color.match") || |
38 | !strcmp(var, "color.grep.match")) { | |
39 | if (!value) | |
40 | return config_error_nonbool(var); | |
41 | color_parse(value, var, opt->color_match); | |
42 | return 0; | |
43 | } | |
44 | return git_color_default_config(var, value, cb); | |
45 | } | |
46 | ||
e0eb889f JH |
47 | /* |
48 | * git grep pathspecs are somewhat different from diff-tree pathspecs; | |
49 | * pathname wildcards are allowed. | |
50 | */ | |
1362671f | 51 | static int pathspec_matches(const char **paths, const char *name) |
5010cb5f | 52 | { |
e0eb889f | 53 | int namelen, i; |
1362671f | 54 | if (!paths || !*paths) |
5010cb5f JH |
55 | return 1; |
56 | namelen = strlen(name); | |
1362671f JH |
57 | for (i = 0; paths[i]; i++) { |
58 | const char *match = paths[i]; | |
59 | int matchlen = strlen(match); | |
1e3d90e0 | 60 | const char *cp, *meta; |
e0eb889f | 61 | |
bb9e15a8 UKK |
62 | if (!matchlen || |
63 | ((matchlen <= namelen) && | |
64 | !strncmp(name, match, matchlen) && | |
65 | (match[matchlen-1] == '/' || | |
66 | name[matchlen] == '\0' || name[matchlen] == '/'))) | |
e0eb889f JH |
67 | return 1; |
68 | if (!fnmatch(match, name, 0)) | |
69 | return 1; | |
70 | if (name[namelen-1] != '/') | |
5010cb5f | 71 | continue; |
e0eb889f | 72 | |
1e3d90e0 | 73 | /* We are being asked if the directory ("name") is worth |
e0eb889f JH |
74 | * descending into. |
75 | * | |
76 | * Find the longest leading directory name that does | |
77 | * not have metacharacter in the pathspec; the name | |
78 | * we are looking at must overlap with that directory. | |
5010cb5f | 79 | */ |
1e3d90e0 | 80 | for (cp = match, meta = NULL; cp - match < matchlen; cp++) { |
e0eb889f | 81 | char ch = *cp; |
1e3d90e0 JH |
82 | if (ch == '*' || ch == '[' || ch == '?') { |
83 | meta = cp; | |
5010cb5f | 84 | break; |
1e3d90e0 | 85 | } |
e0eb889f | 86 | } |
1e3d90e0 JH |
87 | if (!meta) |
88 | meta = cp; /* fully literal */ | |
89 | ||
90 | if (namelen <= meta - match) { | |
e0eb889f JH |
91 | /* Looking at "Documentation/" and |
92 | * the pattern says "Documentation/howto/", or | |
1e3d90e0 JH |
93 | * "Documentation/diff*.txt". The name we |
94 | * have should match prefix. | |
e0eb889f JH |
95 | */ |
96 | if (!memcmp(match, name, namelen)) | |
97 | return 1; | |
1e3d90e0 | 98 | continue; |
e0eb889f | 99 | } |
1e3d90e0 JH |
100 | |
101 | if (meta - match < namelen) { | |
e0eb889f | 102 | /* Looking at "Documentation/howto/" and |
1e3d90e0 JH |
103 | * the pattern says "Documentation/h*"; |
104 | * match up to "Do.../h"; this avoids descending | |
105 | * into "Documentation/technical/". | |
e0eb889f | 106 | */ |
1e3d90e0 | 107 | if (!memcmp(match, name, meta - match)) |
e0eb889f | 108 | return 1; |
1e3d90e0 | 109 | continue; |
e0eb889f | 110 | } |
5010cb5f JH |
111 | } |
112 | return 0; | |
113 | } | |
114 | ||
0d042fec | 115 | static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char *name, int tree_name_len) |
5010cb5f JH |
116 | { |
117 | unsigned long size; | |
118 | char *data; | |
21666f1a | 119 | enum object_type type; |
0d042fec | 120 | char *to_free = NULL; |
5010cb5f | 121 | int hit; |
0d042fec | 122 | |
21666f1a | 123 | data = read_sha1_file(sha1, &type, &size); |
5010cb5f JH |
124 | if (!data) { |
125 | error("'%s': unable to read %s", name, sha1_to_hex(sha1)); | |
126 | return 0; | |
127 | } | |
0d042fec JH |
128 | if (opt->relative && opt->prefix_length) { |
129 | static char name_buf[PATH_MAX]; | |
130 | char *cp; | |
131 | int name_len = strlen(name) - opt->prefix_length + 1; | |
132 | ||
133 | if (!tree_name_len) | |
134 | name += opt->prefix_length; | |
135 | else { | |
136 | if (ARRAY_SIZE(name_buf) <= name_len) | |
137 | cp = to_free = xmalloc(name_len); | |
138 | else | |
139 | cp = name_buf; | |
140 | memcpy(cp, name, tree_name_len); | |
141 | strcpy(cp + tree_name_len, | |
142 | name + tree_name_len + opt->prefix_length); | |
143 | name = cp; | |
144 | } | |
145 | } | |
5010cb5f JH |
146 | hit = grep_buffer(opt, name, data, size); |
147 | free(data); | |
0d042fec | 148 | free(to_free); |
5010cb5f JH |
149 | return hit; |
150 | } | |
151 | ||
152 | static int grep_file(struct grep_opt *opt, const char *filename) | |
153 | { | |
154 | struct stat st; | |
155 | int i; | |
156 | char *data; | |
dc49cd76 SP |
157 | size_t sz; |
158 | ||
5010cb5f JH |
159 | if (lstat(filename, &st) < 0) { |
160 | err_ret: | |
161 | if (errno != ENOENT) | |
162 | error("'%s': %s", filename, strerror(errno)); | |
163 | return 0; | |
164 | } | |
165 | if (!st.st_size) | |
166 | return 0; /* empty file -- no grep hit */ | |
167 | if (!S_ISREG(st.st_mode)) | |
168 | return 0; | |
dc49cd76 | 169 | sz = xsize_t(st.st_size); |
5010cb5f JH |
170 | i = open(filename, O_RDONLY); |
171 | if (i < 0) | |
172 | goto err_ret; | |
dc49cd76 SP |
173 | data = xmalloc(sz + 1); |
174 | if (st.st_size != read_in_full(i, data, sz)) { | |
5010cb5f JH |
175 | error("'%s': short read %s", filename, strerror(errno)); |
176 | close(i); | |
177 | free(data); | |
178 | return 0; | |
179 | } | |
180 | close(i); | |
0d042fec JH |
181 | if (opt->relative && opt->prefix_length) |
182 | filename += opt->prefix_length; | |
dc49cd76 | 183 | i = grep_buffer(opt, filename, data, sz); |
5010cb5f JH |
184 | free(data); |
185 | return i; | |
186 | } | |
187 | ||
5f7c643a | 188 | #if !NO_EXTERNAL_GREP |
1e2398d7 LT |
189 | static int exec_grep(int argc, const char **argv) |
190 | { | |
191 | pid_t pid; | |
192 | int status; | |
193 | ||
194 | argv[argc] = NULL; | |
195 | pid = fork(); | |
196 | if (pid < 0) | |
197 | return pid; | |
198 | if (!pid) { | |
199 | execvp("grep", (char **) argv); | |
200 | exit(255); | |
201 | } | |
202 | while (waitpid(pid, &status, 0) < 0) { | |
203 | if (errno == EINTR) | |
204 | continue; | |
205 | return -1; | |
206 | } | |
207 | if (WIFEXITED(status)) { | |
208 | if (!WEXITSTATUS(status)) | |
209 | return 1; | |
210 | return 0; | |
211 | } | |
212 | return -1; | |
213 | } | |
214 | ||
215 | #define MAXARGS 1000 | |
ffa0a7ab JH |
216 | #define ARGBUF 4096 |
217 | #define push_arg(a) do { \ | |
218 | if (nr < MAXARGS) argv[nr++] = (a); \ | |
219 | else die("maximum number of args exceeded"); \ | |
220 | } while (0) | |
1e2398d7 | 221 | |
d99ebf08 JH |
222 | /* |
223 | * If you send a singleton filename to grep, it does not give | |
224 | * the name of the file. GNU grep has "-H" but we would want | |
225 | * that behaviour in a portable way. | |
226 | * | |
227 | * So we keep two pathnames in argv buffer unsent to grep in | |
228 | * the main loop if we need to do more than one grep. | |
229 | */ | |
230 | static int flush_grep(struct grep_opt *opt, | |
231 | int argc, int arg0, const char **argv, int *kept) | |
232 | { | |
233 | int status; | |
234 | int count = argc - arg0; | |
235 | const char *kept_0 = NULL; | |
236 | ||
237 | if (count <= 2) { | |
238 | /* | |
239 | * Because we keep at least 2 paths in the call from | |
240 | * the main loop (i.e. kept != NULL), and MAXARGS is | |
241 | * far greater than 2, this usually is a call to | |
242 | * conclude the grep. However, the user could attempt | |
243 | * to overflow the argv buffer by giving too many | |
244 | * options to leave very small number of real | |
245 | * arguments even for the call in the main loop. | |
246 | */ | |
247 | if (kept) | |
248 | die("insanely many options to grep"); | |
249 | ||
250 | /* | |
251 | * If we have two or more paths, we do not have to do | |
252 | * anything special, but we need to push /dev/null to | |
253 | * get "-H" behaviour of GNU grep portably but when we | |
254 | * are not doing "-l" nor "-L" nor "-c". | |
255 | */ | |
256 | if (count == 1 && | |
257 | !opt->name_only && | |
258 | !opt->unmatch_name_only && | |
259 | !opt->count) { | |
260 | argv[argc++] = "/dev/null"; | |
261 | argv[argc] = NULL; | |
262 | } | |
263 | } | |
264 | ||
265 | else if (kept) { | |
266 | /* | |
267 | * Called because we found many paths and haven't finished | |
268 | * iterating over the cache yet. We keep two paths | |
269 | * for the concluding call. argv[argc-2] and argv[argc-1] | |
270 | * has the last two paths, so save the first one away, | |
271 | * replace it with NULL while sending the list to grep, | |
272 | * and recover them after we are done. | |
273 | */ | |
274 | *kept = 2; | |
275 | kept_0 = argv[argc-2]; | |
276 | argv[argc-2] = NULL; | |
277 | argc -= 2; | |
278 | } | |
279 | ||
280 | status = exec_grep(argc, argv); | |
281 | ||
282 | if (kept_0) { | |
283 | /* | |
284 | * Then recover them. Now the last arg is beyond the | |
285 | * terminating NULL which is at argc, and the second | |
286 | * from the last is what we saved away in kept_0 | |
287 | */ | |
288 | argv[arg0++] = kept_0; | |
289 | argv[arg0] = argv[argc+1]; | |
290 | } | |
291 | return status; | |
292 | } | |
293 | ||
a94982ef RS |
294 | static void grep_add_color(struct strbuf *sb, const char *escape_seq) |
295 | { | |
296 | size_t orig_len = sb->len; | |
297 | ||
298 | while (*escape_seq) { | |
299 | if (*escape_seq == 'm') | |
300 | strbuf_addch(sb, ';'); | |
301 | else if (*escape_seq != '\033' && *escape_seq != '[') | |
302 | strbuf_addch(sb, *escape_seq); | |
303 | escape_seq++; | |
304 | } | |
305 | if (sb->len > orig_len && sb->buf[sb->len - 1] == ';') | |
306 | strbuf_setlen(sb, sb->len - 1); | |
307 | } | |
308 | ||
1e2398d7 LT |
309 | static int external_grep(struct grep_opt *opt, const char **paths, int cached) |
310 | { | |
fcfe34b5 | 311 | int i, nr, argc, hit, len, status; |
1e2398d7 | 312 | const char *argv[MAXARGS+1]; |
ffa0a7ab JH |
313 | char randarg[ARGBUF]; |
314 | char *argptr = randarg; | |
1e2398d7 LT |
315 | struct grep_pat *p; |
316 | ||
0d042fec | 317 | if (opt->extended || (opt->relative && opt->prefix_length)) |
79d3696c | 318 | return -1; |
ffa0a7ab JH |
319 | len = nr = 0; |
320 | push_arg("grep"); | |
ffa0a7ab | 321 | if (opt->fixed) |
f6647519 | 322 | push_arg("-F"); |
ffa0a7ab JH |
323 | if (opt->linenum) |
324 | push_arg("-n"); | |
7977f0ea LT |
325 | if (!opt->pathname) |
326 | push_arg("-h"); | |
ffa0a7ab JH |
327 | if (opt->regflags & REG_EXTENDED) |
328 | push_arg("-E"); | |
3026402c RF |
329 | if (opt->regflags & REG_ICASE) |
330 | push_arg("-i"); | |
bc395643 JH |
331 | if (opt->binary == GREP_BINARY_NOMATCH) |
332 | push_arg("-I"); | |
1e2398d7 | 333 | if (opt->word_regexp) |
ffa0a7ab | 334 | push_arg("-w"); |
1e2398d7 | 335 | if (opt->name_only) |
ffa0a7ab JH |
336 | push_arg("-l"); |
337 | if (opt->unmatch_name_only) | |
338 | push_arg("-L"); | |
83caecca RZ |
339 | if (opt->null_following_name) |
340 | /* in GNU grep git's "-z" translates to "-Z" */ | |
341 | push_arg("-Z"); | |
ffa0a7ab JH |
342 | if (opt->count) |
343 | push_arg("-c"); | |
344 | if (opt->post_context || opt->pre_context) { | |
345 | if (opt->post_context != opt->pre_context) { | |
346 | if (opt->pre_context) { | |
347 | push_arg("-B"); | |
348 | len += snprintf(argptr, sizeof(randarg)-len, | |
4b87474b | 349 | "%u", opt->pre_context) + 1; |
ffa0a7ab JH |
350 | if (sizeof(randarg) <= len) |
351 | die("maximum length of args exceeded"); | |
352 | push_arg(argptr); | |
353 | argptr += len; | |
354 | } | |
355 | if (opt->post_context) { | |
356 | push_arg("-A"); | |
357 | len += snprintf(argptr, sizeof(randarg)-len, | |
4b87474b | 358 | "%u", opt->post_context) + 1; |
ffa0a7ab JH |
359 | if (sizeof(randarg) <= len) |
360 | die("maximum length of args exceeded"); | |
361 | push_arg(argptr); | |
362 | argptr += len; | |
363 | } | |
364 | } | |
365 | else { | |
366 | push_arg("-C"); | |
367 | len += snprintf(argptr, sizeof(randarg)-len, | |
4b87474b | 368 | "%u", opt->post_context) + 1; |
ffa0a7ab JH |
369 | if (sizeof(randarg) <= len) |
370 | die("maximum length of args exceeded"); | |
371 | push_arg(argptr); | |
372 | argptr += len; | |
373 | } | |
374 | } | |
1e2398d7 | 375 | for (p = opt->pattern_list; p; p = p->next) { |
ffa0a7ab JH |
376 | push_arg("-e"); |
377 | push_arg(p->pattern); | |
1e2398d7 | 378 | } |
a94982ef RS |
379 | if (opt->color) { |
380 | struct strbuf sb = STRBUF_INIT; | |
381 | ||
382 | grep_add_color(&sb, opt->color_match); | |
383 | setenv("GREP_COLOR", sb.buf, 1); | |
384 | ||
385 | strbuf_reset(&sb); | |
386 | strbuf_addstr(&sb, "mt="); | |
387 | grep_add_color(&sb, opt->color_match); | |
388 | strbuf_addstr(&sb, ":sl=:cx=:fn=:ln=:bn=:se="); | |
389 | setenv("GREP_COLORS", sb.buf, 1); | |
390 | ||
391 | strbuf_release(&sb); | |
392 | ||
393 | if (opt->color_external && strlen(opt->color_external) > 0) | |
394 | push_arg(opt->color_external); | |
395 | } | |
bbb66c60 | 396 | |
1e2398d7 LT |
397 | hit = 0; |
398 | argc = nr; | |
399 | for (i = 0; i < active_nr; i++) { | |
400 | struct cache_entry *ce = active_cache[i]; | |
fbd01abf | 401 | char *name; |
d99ebf08 | 402 | int kept; |
7a51ed66 | 403 | if (!S_ISREG(ce->ce_mode)) |
1e2398d7 LT |
404 | continue; |
405 | if (!pathspec_matches(paths, ce->name)) | |
406 | continue; | |
bbb66c60 LT |
407 | name = ce->name; |
408 | if (name[0] == '-') { | |
409 | int len = ce_namelen(ce); | |
410 | name = xmalloc(len + 3); | |
411 | memcpy(name, "./", 2); | |
412 | memcpy(name + 2, ce->name, len + 1); | |
413 | } | |
414 | argv[argc++] = name; | |
6326cee5 JH |
415 | if (MAXARGS <= argc) { |
416 | status = flush_grep(opt, argc, nr, argv, &kept); | |
417 | if (0 < status) | |
418 | hit = 1; | |
419 | argc = nr + kept; | |
420 | } | |
36f2587f JH |
421 | if (ce_stage(ce)) { |
422 | do { | |
423 | i++; | |
424 | } while (i < active_nr && | |
425 | !strcmp(ce->name, active_cache[i]->name)); | |
426 | i--; /* compensate for loop control */ | |
427 | } | |
1e2398d7 | 428 | } |
fcfe34b5 | 429 | if (argc > nr) { |
d99ebf08 | 430 | status = flush_grep(opt, argc, nr, argv, NULL); |
fcfe34b5 JH |
431 | if (0 < status) |
432 | hit = 1; | |
433 | } | |
434 | return hit; | |
1e2398d7 | 435 | } |
ff1f9945 | 436 | #endif |
1e2398d7 | 437 | |
1362671f | 438 | static int grep_cache(struct grep_opt *opt, const char **paths, int cached) |
5010cb5f JH |
439 | { |
440 | int hit = 0; | |
441 | int nr; | |
442 | read_cache(); | |
443 | ||
5f7c643a | 444 | #if !NO_EXTERNAL_GREP |
1e2398d7 LT |
445 | /* |
446 | * Use the external "grep" command for the case where | |
447 | * we grep through the checked-out files. It tends to | |
448 | * be a lot more optimized | |
449 | */ | |
e70b9a8b | 450 | if (!cached && !builtin_grep) { |
1e2398d7 LT |
451 | hit = external_grep(opt, paths, cached); |
452 | if (hit >= 0) | |
453 | return hit; | |
454 | } | |
455 | #endif | |
456 | ||
5010cb5f JH |
457 | for (nr = 0; nr < active_nr; nr++) { |
458 | struct cache_entry *ce = active_cache[nr]; | |
7a51ed66 | 459 | if (!S_ISREG(ce->ce_mode)) |
5010cb5f | 460 | continue; |
1362671f | 461 | if (!pathspec_matches(paths, ce->name)) |
5010cb5f | 462 | continue; |
57d43466 NTND |
463 | /* |
464 | * If CE_VALID is on, we assume worktree file and its cache entry | |
465 | * are identical, even if worktree file has been modified, so use | |
466 | * cache version instead | |
467 | */ | |
468 | if (cached || (ce->ce_flags & CE_VALID)) { | |
36f2587f JH |
469 | if (ce_stage(ce)) |
470 | continue; | |
0d042fec | 471 | hit |= grep_sha1(opt, ce->sha1, ce->name, 0); |
36f2587f | 472 | } |
5010cb5f JH |
473 | else |
474 | hit |= grep_file(opt, ce->name); | |
36f2587f JH |
475 | if (ce_stage(ce)) { |
476 | do { | |
477 | nr++; | |
478 | } while (nr < active_nr && | |
479 | !strcmp(ce->name, active_cache[nr]->name)); | |
480 | nr--; /* compensate for loop control */ | |
481 | } | |
5010cb5f | 482 | } |
b48fb5b6 | 483 | free_grep_patterns(opt); |
5010cb5f JH |
484 | return hit; |
485 | } | |
486 | ||
1362671f | 487 | static int grep_tree(struct grep_opt *opt, const char **paths, |
5010cb5f JH |
488 | struct tree_desc *tree, |
489 | const char *tree_name, const char *base) | |
490 | { | |
5010cb5f JH |
491 | int len; |
492 | int hit = 0; | |
4c068a98 | 493 | struct name_entry entry; |
e0eb889f | 494 | char *down; |
0d042fec | 495 | int tn_len = strlen(tree_name); |
620e2bb9 DP |
496 | struct strbuf pathbuf; |
497 | ||
498 | strbuf_init(&pathbuf, PATH_MAX + tn_len); | |
5010cb5f | 499 | |
0d042fec | 500 | if (tn_len) { |
620e2bb9 DP |
501 | strbuf_add(&pathbuf, tree_name, tn_len); |
502 | strbuf_addch(&pathbuf, ':'); | |
503 | tn_len = pathbuf.len; | |
5010cb5f | 504 | } |
620e2bb9 DP |
505 | strbuf_addstr(&pathbuf, base); |
506 | len = pathbuf.len; | |
5010cb5f | 507 | |
4c068a98 | 508 | while (tree_entry(tree, &entry)) { |
620e2bb9 DP |
509 | int te_len = tree_entry_len(entry.path, entry.sha1); |
510 | pathbuf.len = len; | |
511 | strbuf_add(&pathbuf, entry.path, te_len); | |
5010cb5f | 512 | |
4c068a98 | 513 | if (S_ISDIR(entry.mode)) |
e0eb889f JH |
514 | /* Match "abc/" against pathspec to |
515 | * decide if we want to descend into "abc" | |
516 | * directory. | |
517 | */ | |
620e2bb9 | 518 | strbuf_addch(&pathbuf, '/'); |
e0eb889f | 519 | |
620e2bb9 | 520 | down = pathbuf.buf + tn_len; |
1362671f | 521 | if (!pathspec_matches(paths, down)) |
5010cb5f | 522 | ; |
4c068a98 | 523 | else if (S_ISREG(entry.mode)) |
620e2bb9 | 524 | hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len); |
4c068a98 | 525 | else if (S_ISDIR(entry.mode)) { |
21666f1a | 526 | enum object_type type; |
5010cb5f JH |
527 | struct tree_desc sub; |
528 | void *data; | |
6fda5e51 LT |
529 | unsigned long size; |
530 | ||
531 | data = read_sha1_file(entry.sha1, &type, &size); | |
5010cb5f JH |
532 | if (!data) |
533 | die("unable to read tree (%s)", | |
4c068a98 | 534 | sha1_to_hex(entry.sha1)); |
6fda5e51 | 535 | init_tree_desc(&sub, data, size); |
1362671f | 536 | hit |= grep_tree(opt, paths, &sub, tree_name, down); |
5010cb5f JH |
537 | free(data); |
538 | } | |
5010cb5f | 539 | } |
620e2bb9 | 540 | strbuf_release(&pathbuf); |
5010cb5f JH |
541 | return hit; |
542 | } | |
543 | ||
1362671f | 544 | static int grep_object(struct grep_opt *opt, const char **paths, |
5010cb5f JH |
545 | struct object *obj, const char *name) |
546 | { | |
1974632c | 547 | if (obj->type == OBJ_BLOB) |
0d042fec | 548 | return grep_sha1(opt, obj->sha1, name, 0); |
1974632c | 549 | if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) { |
5010cb5f JH |
550 | struct tree_desc tree; |
551 | void *data; | |
6fda5e51 | 552 | unsigned long size; |
5010cb5f JH |
553 | int hit; |
554 | data = read_object_with_reference(obj->sha1, tree_type, | |
6fda5e51 | 555 | &size, NULL); |
5010cb5f JH |
556 | if (!data) |
557 | die("unable to read tree (%s)", sha1_to_hex(obj->sha1)); | |
6fda5e51 | 558 | init_tree_desc(&tree, data, size); |
1362671f | 559 | hit = grep_tree(opt, paths, &tree, name, ""); |
5010cb5f JH |
560 | free(data); |
561 | return hit; | |
562 | } | |
885a86ab | 563 | die("unable to grep from object of type %s", typename(obj->type)); |
5010cb5f JH |
564 | } |
565 | ||
566 | static const char builtin_grep_usage[] = | |
fa4946b5 | 567 | "git grep <option>* [-e] <pattern> <rev>* [[--] <path>...]"; |
5010cb5f | 568 | |
088b084b JH |
569 | static const char emsg_invalid_context_len[] = |
570 | "%s: invalid context length argument"; | |
571 | static const char emsg_missing_context_len[] = | |
572 | "missing context length argument"; | |
573 | static const char emsg_missing_argument[] = | |
574 | "option requires an argument -%s"; | |
575 | ||
a633fca0 | 576 | int cmd_grep(int argc, const char **argv, const char *prefix) |
5010cb5f | 577 | { |
5010cb5f | 578 | int hit = 0; |
5010cb5f | 579 | int cached = 0; |
5acd64ed | 580 | int seen_dashdash = 0; |
5010cb5f | 581 | struct grep_opt opt; |
1f1e895f | 582 | struct object_array list = { 0, 0, NULL }; |
1362671f | 583 | const char **paths = NULL; |
5acd64ed | 584 | int i; |
5010cb5f JH |
585 | |
586 | memset(&opt, 0, sizeof(opt)); | |
0d042fec JH |
587 | opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0; |
588 | opt.relative = 1; | |
7977f0ea | 589 | opt.pathname = 1; |
f9b9faf6 | 590 | opt.pattern_tail = &opt.pattern_list; |
5010cb5f JH |
591 | opt.regflags = REG_NEWLINE; |
592 | ||
7e8f59d5 RS |
593 | strcpy(opt.color_match, GIT_COLOR_RED GIT_COLOR_BOLD); |
594 | opt.color = -1; | |
595 | git_config(grep_config, &opt); | |
596 | if (opt.color == -1) | |
597 | opt.color = git_use_color_default; | |
598 | ||
5010cb5f | 599 | /* |
5acd64ed JH |
600 | * If there is no -- then the paths must exist in the working |
601 | * tree. If there is no explicit pattern specified with -e or | |
602 | * -f, we take the first unrecognized non option to be the | |
603 | * pattern, but then what follows it must be zero or more | |
604 | * valid refs up to the -- (if exists), and then existing | |
605 | * paths. If there is an explicit pattern, then the first | |
82e5a82f | 606 | * unrecognized non option is the beginning of the refs list |
5acd64ed | 607 | * that continues up to the -- (if exists), and then paths. |
5010cb5f | 608 | */ |
5acd64ed | 609 | |
1362671f JH |
610 | while (1 < argc) { |
611 | const char *arg = argv[1]; | |
612 | argc--; argv++; | |
613 | if (!strcmp("--cached", arg)) { | |
614 | cached = 1; | |
615 | continue; | |
616 | } | |
e70b9a8b NTND |
617 | if (!strcmp("--no-ext-grep", arg)) { |
618 | builtin_grep = 1; | |
619 | continue; | |
620 | } | |
b8d0f5a0 JH |
621 | if (!strcmp("-a", arg) || |
622 | !strcmp("--text", arg)) { | |
623 | opt.binary = GREP_BINARY_TEXT; | |
624 | continue; | |
625 | } | |
1362671f JH |
626 | if (!strcmp("-i", arg) || |
627 | !strcmp("--ignore-case", arg)) { | |
628 | opt.regflags |= REG_ICASE; | |
629 | continue; | |
630 | } | |
b8d0f5a0 JH |
631 | if (!strcmp("-I", arg)) { |
632 | opt.binary = GREP_BINARY_NOMATCH; | |
633 | continue; | |
634 | } | |
1362671f JH |
635 | if (!strcmp("-v", arg) || |
636 | !strcmp("--invert-match", arg)) { | |
637 | opt.invert = 1; | |
638 | continue; | |
639 | } | |
640 | if (!strcmp("-E", arg) || | |
641 | !strcmp("--extended-regexp", arg)) { | |
642 | opt.regflags |= REG_EXTENDED; | |
643 | continue; | |
644 | } | |
07ea91d8 JH |
645 | if (!strcmp("-F", arg) || |
646 | !strcmp("--fixed-strings", arg)) { | |
647 | opt.fixed = 1; | |
648 | continue; | |
649 | } | |
1362671f JH |
650 | if (!strcmp("-G", arg) || |
651 | !strcmp("--basic-regexp", arg)) { | |
652 | opt.regflags &= ~REG_EXTENDED; | |
653 | continue; | |
654 | } | |
655 | if (!strcmp("-n", arg)) { | |
656 | opt.linenum = 1; | |
657 | continue; | |
658 | } | |
7977f0ea LT |
659 | if (!strcmp("-h", arg)) { |
660 | opt.pathname = 0; | |
661 | continue; | |
662 | } | |
1362671f | 663 | if (!strcmp("-H", arg)) { |
7977f0ea | 664 | opt.pathname = 1; |
1362671f JH |
665 | continue; |
666 | } | |
667 | if (!strcmp("-l", arg) || | |
2cd5dfd2 | 668 | !strcmp("--name-only", arg) || |
1362671f JH |
669 | !strcmp("--files-with-matches", arg)) { |
670 | opt.name_only = 1; | |
671 | continue; | |
672 | } | |
e23d2d6b JH |
673 | if (!strcmp("-L", arg) || |
674 | !strcmp("--files-without-match", arg)) { | |
675 | opt.unmatch_name_only = 1; | |
676 | continue; | |
677 | } | |
83caecca RZ |
678 | if (!strcmp("-z", arg) || |
679 | !strcmp("--null", arg)) { | |
680 | opt.null_following_name = 1; | |
681 | continue; | |
682 | } | |
2c866cf1 JH |
683 | if (!strcmp("-c", arg) || |
684 | !strcmp("--count", arg)) { | |
685 | opt.count = 1; | |
686 | continue; | |
687 | } | |
7839a25e JH |
688 | if (!strcmp("-w", arg) || |
689 | !strcmp("--word-regexp", arg)) { | |
690 | opt.word_regexp = 1; | |
691 | continue; | |
692 | } | |
599065a3 JH |
693 | if (!prefixcmp(arg, "-A") || |
694 | !prefixcmp(arg, "-B") || | |
695 | !prefixcmp(arg, "-C") || | |
f462ebb4 | 696 | (arg[0] == '-' && '1' <= arg[1] && arg[1] <= '9')) { |
1362671f | 697 | unsigned num; |
f462ebb4 JH |
698 | const char *scan; |
699 | switch (arg[1]) { | |
700 | case 'A': case 'B': case 'C': | |
701 | if (!arg[2]) { | |
702 | if (argc <= 1) | |
088b084b | 703 | die(emsg_missing_context_len); |
f462ebb4 JH |
704 | scan = *++argv; |
705 | argc--; | |
706 | } | |
707 | else | |
708 | scan = arg + 2; | |
709 | break; | |
710 | default: | |
711 | scan = arg + 1; | |
712 | break; | |
713 | } | |
6aead43d | 714 | if (strtoul_ui(scan, 10, &num)) |
088b084b | 715 | die(emsg_invalid_context_len, scan); |
1362671f JH |
716 | switch (arg[1]) { |
717 | case 'A': | |
718 | opt.post_context = num; | |
719 | break; | |
f462ebb4 | 720 | default: |
1362671f JH |
721 | case 'C': |
722 | opt.post_context = num; | |
723 | case 'B': | |
724 | opt.pre_context = num; | |
725 | break; | |
5010cb5f | 726 | } |
1362671f JH |
727 | continue; |
728 | } | |
aa8c79ad JH |
729 | if (!strcmp("-f", arg)) { |
730 | FILE *patterns; | |
731 | int lno = 0; | |
732 | char buf[1024]; | |
733 | if (argc <= 1) | |
088b084b | 734 | die(emsg_missing_argument, arg); |
aa8c79ad JH |
735 | patterns = fopen(argv[1], "r"); |
736 | if (!patterns) | |
5acd64ed | 737 | die("'%s': %s", argv[1], strerror(errno)); |
aa8c79ad JH |
738 | while (fgets(buf, sizeof(buf), patterns)) { |
739 | int len = strlen(buf); | |
872c930d | 740 | if (len && buf[len-1] == '\n') |
aa8c79ad JH |
741 | buf[len-1] = 0; |
742 | /* ignore empty line like grep does */ | |
743 | if (!buf[0]) | |
744 | continue; | |
83b5d2f5 JH |
745 | append_grep_pattern(&opt, xstrdup(buf), |
746 | argv[1], ++lno, | |
747 | GREP_PATTERN); | |
aa8c79ad JH |
748 | } |
749 | fclose(patterns); | |
750 | argv++; | |
751 | argc--; | |
752 | continue; | |
753 | } | |
79d3696c | 754 | if (!strcmp("--not", arg)) { |
83b5d2f5 JH |
755 | append_grep_pattern(&opt, arg, "command line", 0, |
756 | GREP_NOT); | |
79d3696c JH |
757 | continue; |
758 | } | |
759 | if (!strcmp("--and", arg)) { | |
83b5d2f5 JH |
760 | append_grep_pattern(&opt, arg, "command line", 0, |
761 | GREP_AND); | |
79d3696c JH |
762 | continue; |
763 | } | |
764 | if (!strcmp("--or", arg)) | |
765 | continue; /* no-op */ | |
766 | if (!strcmp("(", arg)) { | |
83b5d2f5 JH |
767 | append_grep_pattern(&opt, arg, "command line", 0, |
768 | GREP_OPEN_PAREN); | |
79d3696c JH |
769 | continue; |
770 | } | |
771 | if (!strcmp(")", arg)) { | |
83b5d2f5 JH |
772 | append_grep_pattern(&opt, arg, "command line", 0, |
773 | GREP_CLOSE_PAREN); | |
79d3696c JH |
774 | continue; |
775 | } | |
0ab7befa JH |
776 | if (!strcmp("--all-match", arg)) { |
777 | opt.all_match = 1; | |
778 | continue; | |
779 | } | |
1362671f JH |
780 | if (!strcmp("-e", arg)) { |
781 | if (1 < argc) { | |
83b5d2f5 JH |
782 | append_grep_pattern(&opt, argv[1], |
783 | "-e option", 0, | |
784 | GREP_PATTERN); | |
f9b9faf6 | 785 | argv++; |
1362671f | 786 | argc--; |
5010cb5f JH |
787 | continue; |
788 | } | |
088b084b | 789 | die(emsg_missing_argument, arg); |
1362671f | 790 | } |
0d042fec JH |
791 | if (!strcmp("--full-name", arg)) { |
792 | opt.relative = 0; | |
793 | continue; | |
794 | } | |
7e8f59d5 RS |
795 | if (!strcmp("--color", arg)) { |
796 | opt.color = 1; | |
797 | continue; | |
798 | } | |
799 | if (!strcmp("--no-color", arg)) { | |
800 | opt.color = 0; | |
801 | continue; | |
802 | } | |
5390590f JH |
803 | if (!strcmp("--", arg)) { |
804 | /* later processing wants to have this at argv[1] */ | |
805 | argv--; | |
806 | argc++; | |
5acd64ed | 807 | break; |
5390590f | 808 | } |
5acd64ed | 809 | if (*arg == '-') |
1362671f | 810 | usage(builtin_grep_usage); |
5acd64ed JH |
811 | |
812 | /* First unrecognized non-option token */ | |
f9b9faf6 | 813 | if (!opt.pattern_list) { |
83b5d2f5 JH |
814 | append_grep_pattern(&opt, arg, "command line", 0, |
815 | GREP_PATTERN); | |
1362671f JH |
816 | break; |
817 | } | |
818 | else { | |
819 | /* We are looking at the first path or rev; | |
5acd64ed | 820 | * it is found at argv[1] after leaving the |
1362671f JH |
821 | * loop. |
822 | */ | |
823 | argc++; argv--; | |
824 | break; | |
5010cb5f | 825 | } |
5010cb5f | 826 | } |
5acd64ed | 827 | |
6e89ec0f NTND |
828 | if (opt.color && !opt.color_external) |
829 | builtin_grep = 1; | |
f9b9faf6 | 830 | if (!opt.pattern_list) |
5010cb5f | 831 | die("no pattern given."); |
07ea91d8 JH |
832 | if ((opt.regflags != REG_NEWLINE) && opt.fixed) |
833 | die("cannot mix --fixed-strings and regexp"); | |
83b5d2f5 | 834 | compile_grep_patterns(&opt); |
5acd64ed JH |
835 | |
836 | /* Check revs and then paths */ | |
837 | for (i = 1; i < argc; i++) { | |
838 | const char *arg = argv[i]; | |
1362671f | 839 | unsigned char sha1[20]; |
5acd64ed JH |
840 | /* Is it a rev? */ |
841 | if (!get_sha1(arg, sha1)) { | |
842 | struct object *object = parse_object(sha1); | |
5acd64ed JH |
843 | if (!object) |
844 | die("bad object %s", arg); | |
1f1e895f | 845 | add_object_array(object, arg, &list); |
5acd64ed JH |
846 | continue; |
847 | } | |
848 | if (!strcmp(arg, "--")) { | |
849 | i++; | |
850 | seen_dashdash = 1; | |
851 | } | |
852 | break; | |
1362671f | 853 | } |
5acd64ed JH |
854 | |
855 | /* The rest are paths */ | |
856 | if (!seen_dashdash) { | |
857 | int j; | |
c39c4f47 | 858 | for (j = i; j < argc; j++) |
5acd64ed JH |
859 | verify_filename(prefix, argv[j]); |
860 | } | |
861 | ||
0d042fec | 862 | if (i < argc) { |
5acd64ed | 863 | paths = get_pathspec(prefix, argv + i); |
0d042fec JH |
864 | if (opt.prefix_length && opt.relative) { |
865 | /* Make sure we do not get outside of paths */ | |
866 | for (i = 0; paths[i]; i++) | |
867 | if (strncmp(prefix, paths[i], opt.prefix_length)) | |
7e44c935 | 868 | die("git grep: cannot generate relative filenames containing '..'"); |
0d042fec JH |
869 | } |
870 | } | |
1362671f JH |
871 | else if (prefix) { |
872 | paths = xcalloc(2, sizeof(const char *)); | |
873 | paths[0] = prefix; | |
874 | paths[1] = NULL; | |
875 | } | |
5010cb5f | 876 | |
6577f542 NTND |
877 | if (!list.nr) { |
878 | if (!cached) | |
879 | setup_work_tree(); | |
1362671f | 880 | return !grep_cache(&opt, paths, cached); |
6577f542 | 881 | } |
aa8c79ad | 882 | |
5010cb5f | 883 | if (cached) |
aa8c79ad | 884 | die("both --cached and trees are given."); |
5010cb5f | 885 | |
1f1e895f | 886 | for (i = 0; i < list.nr; i++) { |
5010cb5f | 887 | struct object *real_obj; |
1f1e895f LT |
888 | real_obj = deref_tag(list.objects[i].item, NULL, 0); |
889 | if (grep_object(&opt, paths, real_obj, list.objects[i].name)) | |
5010cb5f JH |
890 | hit = 1; |
891 | } | |
b48fb5b6 | 892 | free_grep_patterns(&opt); |
5010cb5f JH |
893 | return !hit; |
894 | } |