Update messages in preparation for i18n
[git/git.git] / builtin / grep.c
1 /*
2 * Builtin "git grep"
3 *
4 * Copyright (c) 2006 Junio C Hamano
5 */
6 #include "cache.h"
7 #include "repository.h"
8 #include "config.h"
9 #include "blob.h"
10 #include "tree.h"
11 #include "commit.h"
12 #include "tag.h"
13 #include "tree-walk.h"
14 #include "builtin.h"
15 #include "parse-options.h"
16 #include "string-list.h"
17 #include "run-command.h"
18 #include "userdiff.h"
19 #include "grep.h"
20 #include "quote.h"
21 #include "dir.h"
22 #include "pathspec.h"
23 #include "submodule.h"
24 #include "submodule-config.h"
25 #include "object-store.h"
26
27 static char const * const grep_usage[] = {
28 N_("git grep [<options>] [-e] <pattern> [<rev>...] [[--] <path>...]"),
29 NULL
30 };
31
32 static int recurse_submodules;
33
34 #define GREP_NUM_THREADS_DEFAULT 8
35 static int num_threads;
36
37 #ifndef NO_PTHREADS
38 static pthread_t *threads;
39
40 /* We use one producer thread and THREADS consumer
41 * threads. The producer adds struct work_items to 'todo' and the
42 * consumers pick work items from the same array.
43 */
44 struct work_item {
45 struct grep_source source;
46 char done;
47 struct strbuf out;
48 };
49
50 /* In the range [todo_done, todo_start) in 'todo' we have work_items
51 * that have been or are processed by a consumer thread. We haven't
52 * written the result for these to stdout yet.
53 *
54 * The work_items in [todo_start, todo_end) are waiting to be picked
55 * up by a consumer thread.
56 *
57 * The ranges are modulo TODO_SIZE.
58 */
59 #define TODO_SIZE 128
60 static struct work_item todo[TODO_SIZE];
61 static int todo_start;
62 static int todo_end;
63 static int todo_done;
64
65 /* Has all work items been added? */
66 static int all_work_added;
67
68 /* This lock protects all the variables above. */
69 static pthread_mutex_t grep_mutex;
70
71 static inline void grep_lock(void)
72 {
73 assert(num_threads);
74 pthread_mutex_lock(&grep_mutex);
75 }
76
77 static inline void grep_unlock(void)
78 {
79 assert(num_threads);
80 pthread_mutex_unlock(&grep_mutex);
81 }
82
83 /* Signalled when a new work_item is added to todo. */
84 static pthread_cond_t cond_add;
85
86 /* Signalled when the result from one work_item is written to
87 * stdout.
88 */
89 static pthread_cond_t cond_write;
90
91 /* Signalled when we are finished with everything. */
92 static pthread_cond_t cond_result;
93
94 static int skip_first_line;
95
96 static void add_work(struct grep_opt *opt, const struct grep_source *gs)
97 {
98 grep_lock();
99
100 while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
101 pthread_cond_wait(&cond_write, &grep_mutex);
102 }
103
104 todo[todo_end].source = *gs;
105 if (opt->binary != GREP_BINARY_TEXT)
106 grep_source_load_driver(&todo[todo_end].source);
107 todo[todo_end].done = 0;
108 strbuf_reset(&todo[todo_end].out);
109 todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
110
111 pthread_cond_signal(&cond_add);
112 grep_unlock();
113 }
114
115 static struct work_item *get_work(void)
116 {
117 struct work_item *ret;
118
119 grep_lock();
120 while (todo_start == todo_end && !all_work_added) {
121 pthread_cond_wait(&cond_add, &grep_mutex);
122 }
123
124 if (todo_start == todo_end && all_work_added) {
125 ret = NULL;
126 } else {
127 ret = &todo[todo_start];
128 todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
129 }
130 grep_unlock();
131 return ret;
132 }
133
134 static void work_done(struct work_item *w)
135 {
136 int old_done;
137
138 grep_lock();
139 w->done = 1;
140 old_done = todo_done;
141 for(; todo[todo_done].done && todo_done != todo_start;
142 todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
143 w = &todo[todo_done];
144 if (w->out.len) {
145 const char *p = w->out.buf;
146 size_t len = w->out.len;
147
148 /* Skip the leading hunk mark of the first file. */
149 if (skip_first_line) {
150 while (len) {
151 len--;
152 if (*p++ == '\n')
153 break;
154 }
155 skip_first_line = 0;
156 }
157
158 write_or_die(1, p, len);
159 }
160 grep_source_clear(&w->source);
161 }
162
163 if (old_done != todo_done)
164 pthread_cond_signal(&cond_write);
165
166 if (all_work_added && todo_done == todo_end)
167 pthread_cond_signal(&cond_result);
168
169 grep_unlock();
170 }
171
172 static void *run(void *arg)
173 {
174 int hit = 0;
175 struct grep_opt *opt = arg;
176
177 while (1) {
178 struct work_item *w = get_work();
179 if (!w)
180 break;
181
182 opt->output_priv = w;
183 hit |= grep_source(opt, &w->source);
184 grep_source_clear_data(&w->source);
185 work_done(w);
186 }
187 free_grep_patterns(arg);
188 free(arg);
189
190 return (void*) (intptr_t) hit;
191 }
192
193 static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
194 {
195 struct work_item *w = opt->output_priv;
196 strbuf_add(&w->out, buf, size);
197 }
198
199 static void start_threads(struct grep_opt *opt)
200 {
201 int i;
202
203 pthread_mutex_init(&grep_mutex, NULL);
204 pthread_mutex_init(&grep_read_mutex, NULL);
205 pthread_mutex_init(&grep_attr_mutex, NULL);
206 pthread_cond_init(&cond_add, NULL);
207 pthread_cond_init(&cond_write, NULL);
208 pthread_cond_init(&cond_result, NULL);
209 grep_use_locks = 1;
210
211 for (i = 0; i < ARRAY_SIZE(todo); i++) {
212 strbuf_init(&todo[i].out, 0);
213 }
214
215 threads = xcalloc(num_threads, sizeof(*threads));
216 for (i = 0; i < num_threads; i++) {
217 int err;
218 struct grep_opt *o = grep_opt_dup(opt);
219 o->output = strbuf_out;
220 if (i)
221 o->debug = 0;
222 compile_grep_patterns(o);
223 err = pthread_create(&threads[i], NULL, run, o);
224
225 if (err)
226 die(_("grep: failed to create thread: %s"),
227 strerror(err));
228 }
229 }
230
231 static int wait_all(void)
232 {
233 int hit = 0;
234 int i;
235
236 grep_lock();
237 all_work_added = 1;
238
239 /* Wait until all work is done. */
240 while (todo_done != todo_end)
241 pthread_cond_wait(&cond_result, &grep_mutex);
242
243 /* Wake up all the consumer threads so they can see that there
244 * is no more work to do.
245 */
246 pthread_cond_broadcast(&cond_add);
247 grep_unlock();
248
249 for (i = 0; i < num_threads; i++) {
250 void *h;
251 pthread_join(threads[i], &h);
252 hit |= (int) (intptr_t) h;
253 }
254
255 free(threads);
256
257 pthread_mutex_destroy(&grep_mutex);
258 pthread_mutex_destroy(&grep_read_mutex);
259 pthread_mutex_destroy(&grep_attr_mutex);
260 pthread_cond_destroy(&cond_add);
261 pthread_cond_destroy(&cond_write);
262 pthread_cond_destroy(&cond_result);
263 grep_use_locks = 0;
264
265 return hit;
266 }
267 #else /* !NO_PTHREADS */
268
269 static int wait_all(void)
270 {
271 return 0;
272 }
273 #endif
274
275 static int grep_cmd_config(const char *var, const char *value, void *cb)
276 {
277 int st = grep_config(var, value, cb);
278 if (git_color_default_config(var, value, cb) < 0)
279 st = -1;
280
281 if (!strcmp(var, "grep.threads")) {
282 num_threads = git_config_int(var, value);
283 if (num_threads < 0)
284 die(_("invalid number of threads specified (%d) for %s"),
285 num_threads, var);
286 #ifdef NO_PTHREADS
287 else if (num_threads && num_threads != 1) {
288 /*
289 * TRANSLATORS: %s is the configuration
290 * variable for tweaking threads, currently
291 * grep.threads
292 */
293 warning(_("no threads support, ignoring %s"), var);
294 num_threads = 0;
295 }
296 #endif
297 }
298
299 if (!strcmp(var, "submodule.recurse"))
300 recurse_submodules = git_config_bool(var, value);
301
302 return st;
303 }
304
305 static void *lock_and_read_oid_file(const struct object_id *oid, enum object_type *type, unsigned long *size)
306 {
307 void *data;
308
309 grep_read_lock();
310 data = read_object_file(oid, type, size);
311 grep_read_unlock();
312 return data;
313 }
314
315 static int grep_oid(struct grep_opt *opt, const struct object_id *oid,
316 const char *filename, int tree_name_len,
317 const char *path)
318 {
319 struct strbuf pathbuf = STRBUF_INIT;
320 struct grep_source gs;
321
322 if (opt->relative && opt->prefix_length) {
323 quote_path_relative(filename + tree_name_len, opt->prefix, &pathbuf);
324 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
325 } else {
326 strbuf_addstr(&pathbuf, filename);
327 }
328
329 grep_source_init(&gs, GREP_SOURCE_OID, pathbuf.buf, path, oid);
330 strbuf_release(&pathbuf);
331
332 #ifndef NO_PTHREADS
333 if (num_threads) {
334 /*
335 * add_work() copies gs and thus assumes ownership of
336 * its fields, so do not call grep_source_clear()
337 */
338 add_work(opt, &gs);
339 return 0;
340 } else
341 #endif
342 {
343 int hit;
344
345 hit = grep_source(opt, &gs);
346
347 grep_source_clear(&gs);
348 return hit;
349 }
350 }
351
352 static int grep_file(struct grep_opt *opt, const char *filename)
353 {
354 struct strbuf buf = STRBUF_INIT;
355 struct grep_source gs;
356
357 if (opt->relative && opt->prefix_length)
358 quote_path_relative(filename, opt->prefix, &buf);
359 else
360 strbuf_addstr(&buf, filename);
361
362 grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename);
363 strbuf_release(&buf);
364
365 #ifndef NO_PTHREADS
366 if (num_threads) {
367 /*
368 * add_work() copies gs and thus assumes ownership of
369 * its fields, so do not call grep_source_clear()
370 */
371 add_work(opt, &gs);
372 return 0;
373 } else
374 #endif
375 {
376 int hit;
377
378 hit = grep_source(opt, &gs);
379
380 grep_source_clear(&gs);
381 return hit;
382 }
383 }
384
385 static void append_path(struct grep_opt *opt, const void *data, size_t len)
386 {
387 struct string_list *path_list = opt->output_priv;
388
389 if (len == 1 && *(const char *)data == '\0')
390 return;
391 string_list_append(path_list, xstrndup(data, len));
392 }
393
394 static void run_pager(struct grep_opt *opt, const char *prefix)
395 {
396 struct string_list *path_list = opt->output_priv;
397 struct child_process child = CHILD_PROCESS_INIT;
398 int i, status;
399
400 for (i = 0; i < path_list->nr; i++)
401 argv_array_push(&child.args, path_list->items[i].string);
402 child.dir = prefix;
403 child.use_shell = 1;
404
405 status = run_command(&child);
406 if (status)
407 exit(status);
408 }
409
410 static int grep_cache(struct grep_opt *opt, struct repository *repo,
411 const struct pathspec *pathspec, int cached);
412 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
413 struct tree_desc *tree, struct strbuf *base, int tn_len,
414 int check_attr, struct repository *repo);
415
416 static int grep_submodule(struct grep_opt *opt, struct repository *superproject,
417 const struct pathspec *pathspec,
418 const struct object_id *oid,
419 const char *filename, const char *path)
420 {
421 struct repository submodule;
422 int hit;
423
424 if (!is_submodule_active(superproject, path))
425 return 0;
426
427 if (repo_submodule_init(&submodule, superproject, path))
428 return 0;
429
430 repo_read_gitmodules(&submodule);
431
432 /*
433 * NEEDSWORK: This adds the submodule's object directory to the list of
434 * alternates for the single in-memory object store. This has some bad
435 * consequences for memory (processed objects will never be freed) and
436 * performance (this increases the number of pack files git has to pay
437 * attention to, to the sum of the number of pack files in all the
438 * repositories processed so far). This can be removed once the object
439 * store is no longer global and instead is a member of the repository
440 * object.
441 */
442 grep_read_lock();
443 add_to_alternates_memory(submodule.objects->objectdir);
444 grep_read_unlock();
445
446 if (oid) {
447 struct object *object;
448 struct tree_desc tree;
449 void *data;
450 unsigned long size;
451 struct strbuf base = STRBUF_INIT;
452
453 object = parse_object_or_die(oid, oid_to_hex(oid));
454
455 grep_read_lock();
456 data = read_object_with_reference(&object->oid, tree_type,
457 &size, NULL);
458 grep_read_unlock();
459
460 if (!data)
461 die(_("unable to read tree (%s)"), oid_to_hex(&object->oid));
462
463 strbuf_addstr(&base, filename);
464 strbuf_addch(&base, '/');
465
466 init_tree_desc(&tree, data, size);
467 hit = grep_tree(opt, pathspec, &tree, &base, base.len,
468 object->type == OBJ_COMMIT, &submodule);
469 strbuf_release(&base);
470 free(data);
471 } else {
472 hit = grep_cache(opt, &submodule, pathspec, 1);
473 }
474
475 repo_clear(&submodule);
476 return hit;
477 }
478
479 static int grep_cache(struct grep_opt *opt, struct repository *repo,
480 const struct pathspec *pathspec, int cached)
481 {
482 int hit = 0;
483 int nr;
484 struct strbuf name = STRBUF_INIT;
485 int name_base_len = 0;
486 if (repo->submodule_prefix) {
487 name_base_len = strlen(repo->submodule_prefix);
488 strbuf_addstr(&name, repo->submodule_prefix);
489 }
490
491 if (repo_read_index(repo) < 0)
492 die("index file corrupt");
493
494 for (nr = 0; nr < repo->index->cache_nr; nr++) {
495 const struct cache_entry *ce = repo->index->cache[nr];
496 strbuf_setlen(&name, name_base_len);
497 strbuf_addstr(&name, ce->name);
498
499 if (S_ISREG(ce->ce_mode) &&
500 match_pathspec(pathspec, name.buf, name.len, 0, NULL,
501 S_ISDIR(ce->ce_mode) ||
502 S_ISGITLINK(ce->ce_mode))) {
503 /*
504 * If CE_VALID is on, we assume worktree file and its
505 * cache entry are identical, even if worktree file has
506 * been modified, so use cache version instead
507 */
508 if (cached || (ce->ce_flags & CE_VALID) ||
509 ce_skip_worktree(ce)) {
510 if (ce_stage(ce) || ce_intent_to_add(ce))
511 continue;
512 hit |= grep_oid(opt, &ce->oid, name.buf,
513 0, name.buf);
514 } else {
515 hit |= grep_file(opt, name.buf);
516 }
517 } else if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
518 submodule_path_match(pathspec, name.buf, NULL)) {
519 hit |= grep_submodule(opt, repo, pathspec, NULL, ce->name, ce->name);
520 } else {
521 continue;
522 }
523
524 if (ce_stage(ce)) {
525 do {
526 nr++;
527 } while (nr < repo->index->cache_nr &&
528 !strcmp(ce->name, repo->index->cache[nr]->name));
529 nr--; /* compensate for loop control */
530 }
531 if (hit && opt->status_only)
532 break;
533 }
534
535 strbuf_release(&name);
536 return hit;
537 }
538
539 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
540 struct tree_desc *tree, struct strbuf *base, int tn_len,
541 int check_attr, struct repository *repo)
542 {
543 int hit = 0;
544 enum interesting match = entry_not_interesting;
545 struct name_entry entry;
546 int old_baselen = base->len;
547 struct strbuf name = STRBUF_INIT;
548 int name_base_len = 0;
549 if (repo->submodule_prefix) {
550 strbuf_addstr(&name, repo->submodule_prefix);
551 name_base_len = name.len;
552 }
553
554 while (tree_entry(tree, &entry)) {
555 int te_len = tree_entry_len(&entry);
556
557 if (match != all_entries_interesting) {
558 strbuf_addstr(&name, base->buf + tn_len);
559 match = tree_entry_interesting(&entry, &name,
560 0, pathspec);
561 strbuf_setlen(&name, name_base_len);
562
563 if (match == all_entries_not_interesting)
564 break;
565 if (match == entry_not_interesting)
566 continue;
567 }
568
569 strbuf_add(base, entry.path, te_len);
570
571 if (S_ISREG(entry.mode)) {
572 hit |= grep_oid(opt, entry.oid, base->buf, tn_len,
573 check_attr ? base->buf + tn_len : NULL);
574 } else if (S_ISDIR(entry.mode)) {
575 enum object_type type;
576 struct tree_desc sub;
577 void *data;
578 unsigned long size;
579
580 data = lock_and_read_oid_file(entry.oid, &type, &size);
581 if (!data)
582 die(_("unable to read tree (%s)"),
583 oid_to_hex(entry.oid));
584
585 strbuf_addch(base, '/');
586 init_tree_desc(&sub, data, size);
587 hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
588 check_attr, repo);
589 free(data);
590 } else if (recurse_submodules && S_ISGITLINK(entry.mode)) {
591 hit |= grep_submodule(opt, repo, pathspec, entry.oid,
592 base->buf, base->buf + tn_len);
593 }
594
595 strbuf_setlen(base, old_baselen);
596
597 if (hit && opt->status_only)
598 break;
599 }
600
601 strbuf_release(&name);
602 return hit;
603 }
604
605 static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
606 struct object *obj, const char *name, const char *path)
607 {
608 if (obj->type == OBJ_BLOB)
609 return grep_oid(opt, &obj->oid, name, 0, path);
610 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
611 struct tree_desc tree;
612 void *data;
613 unsigned long size;
614 struct strbuf base;
615 int hit, len;
616
617 grep_read_lock();
618 data = read_object_with_reference(&obj->oid, tree_type,
619 &size, NULL);
620 grep_read_unlock();
621
622 if (!data)
623 die(_("unable to read tree (%s)"), oid_to_hex(&obj->oid));
624
625 len = name ? strlen(name) : 0;
626 strbuf_init(&base, PATH_MAX + len + 1);
627 if (len) {
628 strbuf_add(&base, name, len);
629 strbuf_addch(&base, ':');
630 }
631 init_tree_desc(&tree, data, size);
632 hit = grep_tree(opt, pathspec, &tree, &base, base.len,
633 obj->type == OBJ_COMMIT, the_repository);
634 strbuf_release(&base);
635 free(data);
636 return hit;
637 }
638 die(_("unable to grep from object of type %s"), type_name(obj->type));
639 }
640
641 static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
642 const struct object_array *list)
643 {
644 unsigned int i;
645 int hit = 0;
646 const unsigned int nr = list->nr;
647
648 for (i = 0; i < nr; i++) {
649 struct object *real_obj;
650 real_obj = deref_tag(list->objects[i].item, NULL, 0);
651
652 /* load the gitmodules file for this rev */
653 if (recurse_submodules) {
654 submodule_free(the_repository);
655 gitmodules_config_oid(&real_obj->oid);
656 }
657 if (grep_object(opt, pathspec, real_obj, list->objects[i].name,
658 list->objects[i].path)) {
659 hit = 1;
660 if (opt->status_only)
661 break;
662 }
663 }
664 return hit;
665 }
666
667 static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
668 int exc_std, int use_index)
669 {
670 struct dir_struct dir;
671 int i, hit = 0;
672
673 memset(&dir, 0, sizeof(dir));
674 if (!use_index)
675 dir.flags |= DIR_NO_GITLINKS;
676 if (exc_std)
677 setup_standard_excludes(&dir);
678
679 fill_directory(&dir, &the_index, pathspec);
680 for (i = 0; i < dir.nr; i++) {
681 if (!dir_path_match(dir.entries[i], pathspec, 0, NULL))
682 continue;
683 hit |= grep_file(opt, dir.entries[i]->name);
684 if (hit && opt->status_only)
685 break;
686 }
687 return hit;
688 }
689
690 static int context_callback(const struct option *opt, const char *arg,
691 int unset)
692 {
693 struct grep_opt *grep_opt = opt->value;
694 int value;
695 const char *endp;
696
697 if (unset) {
698 grep_opt->pre_context = grep_opt->post_context = 0;
699 return 0;
700 }
701 value = strtol(arg, (char **)&endp, 10);
702 if (*endp) {
703 return error(_("switch `%c' expects a numerical value"),
704 opt->short_name);
705 }
706 grep_opt->pre_context = grep_opt->post_context = value;
707 return 0;
708 }
709
710 static int file_callback(const struct option *opt, const char *arg, int unset)
711 {
712 struct grep_opt *grep_opt = opt->value;
713 int from_stdin = !strcmp(arg, "-");
714 FILE *patterns;
715 int lno = 0;
716 struct strbuf sb = STRBUF_INIT;
717
718 patterns = from_stdin ? stdin : fopen(arg, "r");
719 if (!patterns)
720 die_errno(_("cannot open '%s'"), arg);
721 while (strbuf_getline(&sb, patterns) == 0) {
722 /* ignore empty line like grep does */
723 if (sb.len == 0)
724 continue;
725
726 append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
727 GREP_PATTERN);
728 }
729 if (!from_stdin)
730 fclose(patterns);
731 strbuf_release(&sb);
732 return 0;
733 }
734
735 static int not_callback(const struct option *opt, const char *arg, int unset)
736 {
737 struct grep_opt *grep_opt = opt->value;
738 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
739 return 0;
740 }
741
742 static int and_callback(const struct option *opt, const char *arg, int unset)
743 {
744 struct grep_opt *grep_opt = opt->value;
745 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
746 return 0;
747 }
748
749 static int open_callback(const struct option *opt, const char *arg, int unset)
750 {
751 struct grep_opt *grep_opt = opt->value;
752 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
753 return 0;
754 }
755
756 static int close_callback(const struct option *opt, const char *arg, int unset)
757 {
758 struct grep_opt *grep_opt = opt->value;
759 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
760 return 0;
761 }
762
763 static int pattern_callback(const struct option *opt, const char *arg,
764 int unset)
765 {
766 struct grep_opt *grep_opt = opt->value;
767 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
768 return 0;
769 }
770
771 int cmd_grep(int argc, const char **argv, const char *prefix)
772 {
773 int hit = 0;
774 int cached = 0, untracked = 0, opt_exclude = -1;
775 int seen_dashdash = 0;
776 int external_grep_allowed__ignored;
777 const char *show_in_pager = NULL, *default_pager = "dummy";
778 struct grep_opt opt;
779 struct object_array list = OBJECT_ARRAY_INIT;
780 struct pathspec pathspec;
781 struct string_list path_list = STRING_LIST_INIT_NODUP;
782 int i;
783 int dummy;
784 int use_index = 1;
785 int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
786 int allow_revs;
787
788 struct option options[] = {
789 OPT_BOOL(0, "cached", &cached,
790 N_("search in index instead of in the work tree")),
791 OPT_NEGBIT(0, "no-index", &use_index,
792 N_("find in contents not managed by git"), 1),
793 OPT_BOOL(0, "untracked", &untracked,
794 N_("search in both tracked and untracked files")),
795 OPT_SET_INT(0, "exclude-standard", &opt_exclude,
796 N_("ignore files specified via '.gitignore'"), 1),
797 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
798 N_("recursively search in each submodule")),
799 OPT_GROUP(""),
800 OPT_BOOL('v', "invert-match", &opt.invert,
801 N_("show non-matching lines")),
802 OPT_BOOL('i', "ignore-case", &opt.ignore_case,
803 N_("case insensitive matching")),
804 OPT_BOOL('w', "word-regexp", &opt.word_regexp,
805 N_("match patterns only at word boundaries")),
806 OPT_SET_INT('a', "text", &opt.binary,
807 N_("process binary files as text"), GREP_BINARY_TEXT),
808 OPT_SET_INT('I', NULL, &opt.binary,
809 N_("don't match patterns in binary files"),
810 GREP_BINARY_NOMATCH),
811 OPT_BOOL(0, "textconv", &opt.allow_textconv,
812 N_("process binary files with textconv filters")),
813 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"),
814 N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
815 NULL, 1 },
816 OPT_GROUP(""),
817 OPT_SET_INT('E', "extended-regexp", &pattern_type_arg,
818 N_("use extended POSIX regular expressions"),
819 GREP_PATTERN_TYPE_ERE),
820 OPT_SET_INT('G', "basic-regexp", &pattern_type_arg,
821 N_("use basic POSIX regular expressions (default)"),
822 GREP_PATTERN_TYPE_BRE),
823 OPT_SET_INT('F', "fixed-strings", &pattern_type_arg,
824 N_("interpret patterns as fixed strings"),
825 GREP_PATTERN_TYPE_FIXED),
826 OPT_SET_INT('P', "perl-regexp", &pattern_type_arg,
827 N_("use Perl-compatible regular expressions"),
828 GREP_PATTERN_TYPE_PCRE),
829 OPT_GROUP(""),
830 OPT_BOOL('n', "line-number", &opt.linenum, N_("show line numbers")),
831 OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1),
832 OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1),
833 OPT_NEGBIT(0, "full-name", &opt.relative,
834 N_("show filenames relative to top directory"), 1),
835 OPT_BOOL('l', "files-with-matches", &opt.name_only,
836 N_("show only filenames instead of matching lines")),
837 OPT_BOOL(0, "name-only", &opt.name_only,
838 N_("synonym for --files-with-matches")),
839 OPT_BOOL('L', "files-without-match",
840 &opt.unmatch_name_only,
841 N_("show only the names of files without match")),
842 OPT_BOOL_F('z', "null", &opt.null_following_name,
843 N_("print NUL after filenames"),
844 PARSE_OPT_NOCOMPLETE),
845 OPT_BOOL('c', "count", &opt.count,
846 N_("show the number of matches instead of matching lines")),
847 OPT__COLOR(&opt.color, N_("highlight matches")),
848 OPT_BOOL(0, "break", &opt.file_break,
849 N_("print empty line between matches from different files")),
850 OPT_BOOL(0, "heading", &opt.heading,
851 N_("show filename only once above matches from same file")),
852 OPT_GROUP(""),
853 OPT_CALLBACK('C', "context", &opt, N_("n"),
854 N_("show <n> context lines before and after matches"),
855 context_callback),
856 OPT_INTEGER('B', "before-context", &opt.pre_context,
857 N_("show <n> context lines before matches")),
858 OPT_INTEGER('A', "after-context", &opt.post_context,
859 N_("show <n> context lines after matches")),
860 OPT_INTEGER(0, "threads", &num_threads,
861 N_("use <n> worker threads")),
862 OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
863 context_callback),
864 OPT_BOOL('p', "show-function", &opt.funcname,
865 N_("show a line with the function name before matches")),
866 OPT_BOOL('W', "function-context", &opt.funcbody,
867 N_("show the surrounding function")),
868 OPT_GROUP(""),
869 OPT_CALLBACK('f', NULL, &opt, N_("file"),
870 N_("read patterns from file"), file_callback),
871 { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"),
872 N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback },
873 { OPTION_CALLBACK, 0, "and", &opt, NULL,
874 N_("combine patterns specified with -e"),
875 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
876 OPT_BOOL(0, "or", &dummy, ""),
877 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
878 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
879 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
880 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
881 open_callback },
882 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
883 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
884 close_callback },
885 OPT__QUIET(&opt.status_only,
886 N_("indicate hit with exit status without output")),
887 OPT_BOOL(0, "all-match", &opt.all_match,
888 N_("show only matches from files that match all patterns")),
889 OPT_SET_INT_F(0, "debug", &opt.debug,
890 N_("show parse tree for grep expression"),
891 1, PARSE_OPT_HIDDEN),
892 OPT_GROUP(""),
893 { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
894 N_("pager"), N_("show matching files in the pager"),
895 PARSE_OPT_OPTARG | PARSE_OPT_NOCOMPLETE,
896 NULL, (intptr_t)default_pager },
897 OPT_BOOL_F(0, "ext-grep", &external_grep_allowed__ignored,
898 N_("allow calling of grep(1) (ignored by this build)"),
899 PARSE_OPT_NOCOMPLETE),
900 OPT_END()
901 };
902
903 init_grep_defaults();
904 git_config(grep_cmd_config, NULL);
905 grep_init(&opt, prefix);
906
907 /*
908 * If there is no -- then the paths must exist in the working
909 * tree. If there is no explicit pattern specified with -e or
910 * -f, we take the first unrecognized non option to be the
911 * pattern, but then what follows it must be zero or more
912 * valid refs up to the -- (if exists), and then existing
913 * paths. If there is an explicit pattern, then the first
914 * unrecognized non option is the beginning of the refs list
915 * that continues up to the -- (if exists), and then paths.
916 */
917 argc = parse_options(argc, argv, prefix, options, grep_usage,
918 PARSE_OPT_KEEP_DASHDASH |
919 PARSE_OPT_STOP_AT_NON_OPTION);
920 grep_commit_pattern_type(pattern_type_arg, &opt);
921
922 if (use_index && !startup_info->have_repository) {
923 int fallback = 0;
924 git_config_get_bool("grep.fallbacktonoindex", &fallback);
925 if (fallback)
926 use_index = 0;
927 else
928 /* die the same way as if we did it at the beginning */
929 setup_git_directory();
930 }
931
932 /*
933 * skip a -- separator; we know it cannot be
934 * separating revisions from pathnames if
935 * we haven't even had any patterns yet
936 */
937 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
938 argv++;
939 argc--;
940 }
941
942 /* First unrecognized non-option token */
943 if (argc > 0 && !opt.pattern_list) {
944 append_grep_pattern(&opt, argv[0], "command line", 0,
945 GREP_PATTERN);
946 argv++;
947 argc--;
948 }
949
950 if (show_in_pager == default_pager)
951 show_in_pager = git_pager(1);
952 if (show_in_pager) {
953 opt.color = 0;
954 opt.name_only = 1;
955 opt.null_following_name = 1;
956 opt.output_priv = &path_list;
957 opt.output = append_path;
958 string_list_append(&path_list, show_in_pager);
959 }
960
961 if (!opt.pattern_list)
962 die(_("no pattern given"));
963
964 /*
965 * We have to find "--" in a separate pass, because its presence
966 * influences how we will parse arguments that come before it.
967 */
968 for (i = 0; i < argc; i++) {
969 if (!strcmp(argv[i], "--")) {
970 seen_dashdash = 1;
971 break;
972 }
973 }
974
975 /*
976 * Resolve any rev arguments. If we have a dashdash, then everything up
977 * to it must resolve as a rev. If not, then we stop at the first
978 * non-rev and assume everything else is a path.
979 */
980 allow_revs = use_index && !untracked;
981 for (i = 0; i < argc; i++) {
982 const char *arg = argv[i];
983 struct object_id oid;
984 struct object_context oc;
985 struct object *object;
986
987 if (!strcmp(arg, "--")) {
988 i++;
989 break;
990 }
991
992 if (!allow_revs) {
993 if (seen_dashdash)
994 die(_("--no-index or --untracked cannot be used with revs"));
995 break;
996 }
997
998 if (get_oid_with_context(arg, GET_OID_RECORD_PATH,
999 &oid, &oc)) {
1000 if (seen_dashdash)
1001 die(_("unable to resolve revision: %s"), arg);
1002 break;
1003 }
1004
1005 object = parse_object_or_die(&oid, arg);
1006 if (!seen_dashdash)
1007 verify_non_filename(prefix, arg);
1008 add_object_array_with_path(object, arg, &list, oc.mode, oc.path);
1009 free(oc.path);
1010 }
1011
1012 /*
1013 * Anything left over is presumed to be a path. But in the non-dashdash
1014 * "do what I mean" case, we verify and complain when that isn't true.
1015 */
1016 if (!seen_dashdash) {
1017 int j;
1018 for (j = i; j < argc; j++)
1019 verify_filename(prefix, argv[j], j == i && allow_revs);
1020 }
1021
1022 parse_pathspec(&pathspec, 0,
1023 PATHSPEC_PREFER_CWD |
1024 (opt.max_depth != -1 ? PATHSPEC_MAXDEPTH_VALID : 0),
1025 prefix, argv + i);
1026 pathspec.max_depth = opt.max_depth;
1027 pathspec.recursive = 1;
1028 pathspec.recurse_submodules = !!recurse_submodules;
1029
1030 #ifndef NO_PTHREADS
1031 if (list.nr || cached || show_in_pager)
1032 num_threads = 0;
1033 else if (num_threads == 0)
1034 num_threads = GREP_NUM_THREADS_DEFAULT;
1035 else if (num_threads < 0)
1036 die(_("invalid number of threads specified (%d)"), num_threads);
1037 if (num_threads == 1)
1038 num_threads = 0;
1039 #else
1040 if (num_threads)
1041 warning(_("no threads support, ignoring --threads"));
1042 num_threads = 0;
1043 #endif
1044
1045 if (!num_threads)
1046 /*
1047 * The compiled patterns on the main path are only
1048 * used when not using threading. Otherwise
1049 * start_threads() below calls compile_grep_patterns()
1050 * for each thread.
1051 */
1052 compile_grep_patterns(&opt);
1053
1054 #ifndef NO_PTHREADS
1055 if (num_threads) {
1056 if (!(opt.name_only || opt.unmatch_name_only || opt.count)
1057 && (opt.pre_context || opt.post_context ||
1058 opt.file_break || opt.funcbody))
1059 skip_first_line = 1;
1060 start_threads(&opt);
1061 }
1062 #endif
1063
1064 if (show_in_pager && (cached || list.nr))
1065 die(_("--open-files-in-pager only works on the worktree"));
1066
1067 if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
1068 const char *pager = path_list.items[0].string;
1069 int len = strlen(pager);
1070
1071 if (len > 4 && is_dir_sep(pager[len - 5]))
1072 pager += len - 4;
1073
1074 if (opt.ignore_case && !strcmp("less", pager))
1075 string_list_append(&path_list, "-I");
1076
1077 if (!strcmp("less", pager) || !strcmp("vi", pager)) {
1078 struct strbuf buf = STRBUF_INIT;
1079 strbuf_addf(&buf, "+/%s%s",
1080 strcmp("less", pager) ? "" : "*",
1081 opt.pattern_list->pattern);
1082 string_list_append(&path_list, buf.buf);
1083 strbuf_detach(&buf, NULL);
1084 }
1085 }
1086
1087 if (recurse_submodules && (!use_index || untracked))
1088 die(_("option not supported with --recurse-submodules"));
1089
1090 if (!show_in_pager && !opt.status_only)
1091 setup_pager();
1092
1093 if (!use_index && (untracked || cached))
1094 die(_("--cached or --untracked cannot be used with --no-index"));
1095
1096 if (!use_index || untracked) {
1097 int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
1098 hit = grep_directory(&opt, &pathspec, use_exclude, use_index);
1099 } else if (0 <= opt_exclude) {
1100 die(_("--[no-]exclude-standard cannot be used for tracked contents"));
1101 } else if (!list.nr) {
1102 if (!cached)
1103 setup_work_tree();
1104
1105 hit = grep_cache(&opt, the_repository, &pathspec, cached);
1106 } else {
1107 if (cached)
1108 die(_("both --cached and trees are given"));
1109
1110 hit = grep_objects(&opt, &pathspec, &list);
1111 }
1112
1113 if (num_threads)
1114 hit |= wait_all();
1115 if (hit && show_in_pager)
1116 run_pager(&opt, prefix);
1117 clear_pathspec(&pathspec);
1118 free_grep_patterns(&opt);
1119 return !hit;
1120 }