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