grep: fix worktree case in submodules
[git/git.git] / builtin / grep.c
1 /*
2 * Builtin "git grep"
3 *
4 * Copyright (c) 2006 Junio C Hamano
5 */
6 #define USE_THE_INDEX_COMPATIBILITY_MACROS
7 #include "cache.h"
8 #include "repository.h"
9 #include "config.h"
10 #include "blob.h"
11 #include "tree.h"
12 #include "commit.h"
13 #include "tag.h"
14 #include "tree-walk.h"
15 #include "builtin.h"
16 #include "parse-options.h"
17 #include "string-list.h"
18 #include "run-command.h"
19 #include "userdiff.h"
20 #include "grep.h"
21 #include "quote.h"
22 #include "dir.h"
23 #include "pathspec.h"
24 #include "submodule.h"
25 #include "submodule-config.h"
26 #include "object-store.h"
27
28 static char const * const grep_usage[] = {
29 N_("git grep [<options>] [-e] <pattern> [<rev>...] [[--] <path>...]"),
30 NULL
31 };
32
33 static int recurse_submodules;
34
35 #define GREP_NUM_THREADS_DEFAULT 8
36 static int num_threads;
37
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 pthread_mutex_lock(&grep_mutex);
74 }
75
76 static inline void grep_unlock(void)
77 {
78 pthread_mutex_unlock(&grep_mutex);
79 }
80
81 /* Signalled when a new work_item is added to todo. */
82 static pthread_cond_t cond_add;
83
84 /* Signalled when the result from one work_item is written to
85 * stdout.
86 */
87 static pthread_cond_t cond_write;
88
89 /* Signalled when we are finished with everything. */
90 static pthread_cond_t cond_result;
91
92 static int skip_first_line;
93
94 static void add_work(struct grep_opt *opt, const struct grep_source *gs)
95 {
96 grep_lock();
97
98 while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
99 pthread_cond_wait(&cond_write, &grep_mutex);
100 }
101
102 todo[todo_end].source = *gs;
103 if (opt->binary != GREP_BINARY_TEXT)
104 grep_source_load_driver(&todo[todo_end].source,
105 opt->repo->index);
106 todo[todo_end].done = 0;
107 strbuf_reset(&todo[todo_end].out);
108 todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
109
110 pthread_cond_signal(&cond_add);
111 grep_unlock();
112 }
113
114 static struct work_item *get_work(void)
115 {
116 struct work_item *ret;
117
118 grep_lock();
119 while (todo_start == todo_end && !all_work_added) {
120 pthread_cond_wait(&cond_add, &grep_mutex);
121 }
122
123 if (todo_start == todo_end && all_work_added) {
124 ret = NULL;
125 } else {
126 ret = &todo[todo_start];
127 todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
128 }
129 grep_unlock();
130 return ret;
131 }
132
133 static void work_done(struct work_item *w)
134 {
135 int old_done;
136
137 grep_lock();
138 w->done = 1;
139 old_done = todo_done;
140 for(; todo[todo_done].done && todo_done != todo_start;
141 todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
142 w = &todo[todo_done];
143 if (w->out.len) {
144 const char *p = w->out.buf;
145 size_t len = w->out.len;
146
147 /* Skip the leading hunk mark of the first file. */
148 if (skip_first_line) {
149 while (len) {
150 len--;
151 if (*p++ == '\n')
152 break;
153 }
154 skip_first_line = 0;
155 }
156
157 write_or_die(1, p, len);
158 }
159 grep_source_clear(&w->source);
160 }
161
162 if (old_done != todo_done)
163 pthread_cond_signal(&cond_write);
164
165 if (all_work_added && todo_done == todo_end)
166 pthread_cond_signal(&cond_result);
167
168 grep_unlock();
169 }
170
171 static void *run(void *arg)
172 {
173 int hit = 0;
174 struct grep_opt *opt = arg;
175
176 while (1) {
177 struct work_item *w = get_work();
178 if (!w)
179 break;
180
181 opt->output_priv = w;
182 hit |= grep_source(opt, &w->source);
183 grep_source_clear_data(&w->source);
184 work_done(w);
185 }
186 free_grep_patterns(arg);
187 free(arg);
188
189 return (void*) (intptr_t) hit;
190 }
191
192 static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
193 {
194 struct work_item *w = opt->output_priv;
195 strbuf_add(&w->out, buf, size);
196 }
197
198 static void start_threads(struct grep_opt *opt)
199 {
200 int i;
201
202 pthread_mutex_init(&grep_mutex, NULL);
203 pthread_mutex_init(&grep_read_mutex, NULL);
204 pthread_mutex_init(&grep_attr_mutex, NULL);
205 pthread_cond_init(&cond_add, NULL);
206 pthread_cond_init(&cond_write, NULL);
207 pthread_cond_init(&cond_result, NULL);
208 grep_use_locks = 1;
209
210 for (i = 0; i < ARRAY_SIZE(todo); i++) {
211 strbuf_init(&todo[i].out, 0);
212 }
213
214 threads = xcalloc(num_threads, sizeof(*threads));
215 for (i = 0; i < num_threads; i++) {
216 int err;
217 struct grep_opt *o = grep_opt_dup(opt);
218 o->output = strbuf_out;
219 if (i)
220 o->debug = 0;
221 compile_grep_patterns(o);
222 err = pthread_create(&threads[i], NULL, run, o);
223
224 if (err)
225 die(_("grep: failed to create thread: %s"),
226 strerror(err));
227 }
228 }
229
230 static int wait_all(void)
231 {
232 int hit = 0;
233 int i;
234
235 if (!HAVE_THREADS)
236 BUG("Never call this function unless you have started threads");
237
238 grep_lock();
239 all_work_added = 1;
240
241 /* Wait until all work is done. */
242 while (todo_done != todo_end)
243 pthread_cond_wait(&cond_result, &grep_mutex);
244
245 /* Wake up all the consumer threads so they can see that there
246 * is no more work to do.
247 */
248 pthread_cond_broadcast(&cond_add);
249 grep_unlock();
250
251 for (i = 0; i < num_threads; i++) {
252 void *h;
253 pthread_join(threads[i], &h);
254 hit |= (int) (intptr_t) h;
255 }
256
257 free(threads);
258
259 pthread_mutex_destroy(&grep_mutex);
260 pthread_mutex_destroy(&grep_read_mutex);
261 pthread_mutex_destroy(&grep_attr_mutex);
262 pthread_cond_destroy(&cond_add);
263 pthread_cond_destroy(&cond_write);
264 pthread_cond_destroy(&cond_result);
265 grep_use_locks = 0;
266
267 return hit;
268 }
269
270 static int grep_cmd_config(const char *var, const char *value, void *cb)
271 {
272 int st = grep_config(var, value, cb);
273 if (git_color_default_config(var, value, cb) < 0)
274 st = -1;
275
276 if (!strcmp(var, "grep.threads")) {
277 num_threads = git_config_int(var, value);
278 if (num_threads < 0)
279 die(_("invalid number of threads specified (%d) for %s"),
280 num_threads, var);
281 else if (!HAVE_THREADS && num_threads > 1) {
282 /*
283 * TRANSLATORS: %s is the configuration
284 * variable for tweaking threads, currently
285 * grep.threads
286 */
287 warning(_("no threads support, ignoring %s"), var);
288 num_threads = 1;
289 }
290 }
291
292 if (!strcmp(var, "submodule.recurse"))
293 recurse_submodules = git_config_bool(var, value);
294
295 return st;
296 }
297
298 static void *lock_and_read_oid_file(const struct object_id *oid, enum object_type *type, unsigned long *size)
299 {
300 void *data;
301
302 grep_read_lock();
303 data = read_object_file(oid, type, size);
304 grep_read_unlock();
305 return data;
306 }
307
308 static int grep_oid(struct grep_opt *opt, const struct object_id *oid,
309 const char *filename, int tree_name_len,
310 const char *path)
311 {
312 struct strbuf pathbuf = STRBUF_INIT;
313 struct grep_source gs;
314
315 if (opt->relative && opt->prefix_length) {
316 quote_path_relative(filename + tree_name_len, opt->prefix, &pathbuf);
317 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
318 } else {
319 strbuf_addstr(&pathbuf, filename);
320 }
321
322 grep_source_init(&gs, GREP_SOURCE_OID, pathbuf.buf, path, oid);
323 strbuf_release(&pathbuf);
324
325 if (num_threads > 1) {
326 /*
327 * add_work() copies gs and thus assumes ownership of
328 * its fields, so do not call grep_source_clear()
329 */
330 add_work(opt, &gs);
331 return 0;
332 } else {
333 int hit;
334
335 hit = grep_source(opt, &gs);
336
337 grep_source_clear(&gs);
338 return hit;
339 }
340 }
341
342 static int grep_file(struct grep_opt *opt, const char *filename)
343 {
344 struct strbuf buf = STRBUF_INIT;
345 struct grep_source gs;
346
347 if (opt->relative && opt->prefix_length)
348 quote_path_relative(filename, opt->prefix, &buf);
349 else
350 strbuf_addstr(&buf, filename);
351
352 grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename);
353 strbuf_release(&buf);
354
355 if (num_threads > 1) {
356 /*
357 * add_work() copies gs and thus assumes ownership of
358 * its fields, so do not call grep_source_clear()
359 */
360 add_work(opt, &gs);
361 return 0;
362 } else {
363 int hit;
364
365 hit = grep_source(opt, &gs);
366
367 grep_source_clear(&gs);
368 return hit;
369 }
370 }
371
372 static void append_path(struct grep_opt *opt, const void *data, size_t len)
373 {
374 struct string_list *path_list = opt->output_priv;
375
376 if (len == 1 && *(const char *)data == '\0')
377 return;
378 string_list_append(path_list, xstrndup(data, len));
379 }
380
381 static void run_pager(struct grep_opt *opt, const char *prefix)
382 {
383 struct string_list *path_list = opt->output_priv;
384 struct child_process child = CHILD_PROCESS_INIT;
385 int i, status;
386
387 for (i = 0; i < path_list->nr; i++)
388 argv_array_push(&child.args, path_list->items[i].string);
389 child.dir = prefix;
390 child.use_shell = 1;
391
392 status = run_command(&child);
393 if (status)
394 exit(status);
395 }
396
397 static int grep_cache(struct grep_opt *opt,
398 const struct pathspec *pathspec, int cached);
399 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
400 struct tree_desc *tree, struct strbuf *base, int tn_len,
401 int check_attr);
402
403 static int grep_submodule(struct grep_opt *opt,
404 const struct pathspec *pathspec,
405 const struct object_id *oid,
406 const char *filename, const char *path, int cached)
407 {
408 struct repository subrepo;
409 struct repository *superproject = opt->repo;
410 const struct submodule *sub = submodule_from_path(superproject,
411 &null_oid, path);
412 struct grep_opt subopt;
413 int hit;
414
415 /*
416 * NEEDSWORK: submodules functions need to be protected because they
417 * access the object store via config_from_gitmodules(): the latter
418 * uses get_oid() which, for now, relies on the global the_repository
419 * object.
420 */
421 grep_read_lock();
422
423 if (!is_submodule_active(superproject, path)) {
424 grep_read_unlock();
425 return 0;
426 }
427
428 if (repo_submodule_init(&subrepo, superproject, sub)) {
429 grep_read_unlock();
430 return 0;
431 }
432
433 repo_read_gitmodules(&subrepo);
434
435 /*
436 * NEEDSWORK: This adds the submodule's object directory to the list of
437 * alternates for the single in-memory object store. This has some bad
438 * consequences for memory (processed objects will never be freed) and
439 * performance (this increases the number of pack files git has to pay
440 * attention to, to the sum of the number of pack files in all the
441 * repositories processed so far). This can be removed once the object
442 * store is no longer global and instead is a member of the repository
443 * object.
444 */
445 add_to_alternates_memory(subrepo.objects->odb->path);
446 grep_read_unlock();
447
448 memcpy(&subopt, opt, sizeof(subopt));
449 subopt.repo = &subrepo;
450
451 if (oid) {
452 struct object *object;
453 struct tree_desc tree;
454 void *data;
455 unsigned long size;
456 struct strbuf base = STRBUF_INIT;
457
458 object = parse_object_or_die(oid, oid_to_hex(oid));
459
460 grep_read_lock();
461 data = read_object_with_reference(&object->oid, tree_type,
462 &size, NULL);
463 grep_read_unlock();
464
465 if (!data)
466 die(_("unable to read tree (%s)"), oid_to_hex(&object->oid));
467
468 strbuf_addstr(&base, filename);
469 strbuf_addch(&base, '/');
470
471 init_tree_desc(&tree, data, size);
472 hit = grep_tree(&subopt, pathspec, &tree, &base, base.len,
473 object->type == OBJ_COMMIT);
474 strbuf_release(&base);
475 free(data);
476 } else {
477 hit = grep_cache(&subopt, pathspec, cached);
478 }
479
480 repo_clear(&subrepo);
481 return hit;
482 }
483
484 static int grep_cache(struct grep_opt *opt,
485 const struct pathspec *pathspec, int cached)
486 {
487 struct repository *repo = opt->repo;
488 int hit = 0;
489 int nr;
490 struct strbuf name = STRBUF_INIT;
491 int name_base_len = 0;
492 if (repo->submodule_prefix) {
493 name_base_len = strlen(repo->submodule_prefix);
494 strbuf_addstr(&name, repo->submodule_prefix);
495 }
496
497 if (repo_read_index(repo) < 0)
498 die(_("index file corrupt"));
499
500 for (nr = 0; nr < repo->index->cache_nr; nr++) {
501 const struct cache_entry *ce = repo->index->cache[nr];
502 strbuf_setlen(&name, name_base_len);
503 strbuf_addstr(&name, ce->name);
504
505 if (S_ISREG(ce->ce_mode) &&
506 match_pathspec(repo->index, pathspec, name.buf, name.len, 0, NULL,
507 S_ISDIR(ce->ce_mode) ||
508 S_ISGITLINK(ce->ce_mode))) {
509 /*
510 * If CE_VALID is on, we assume worktree file and its
511 * cache entry are identical, even if worktree file has
512 * been modified, so use cache version instead
513 */
514 if (cached || (ce->ce_flags & CE_VALID) ||
515 ce_skip_worktree(ce)) {
516 if (ce_stage(ce) || ce_intent_to_add(ce))
517 continue;
518 hit |= grep_oid(opt, &ce->oid, name.buf,
519 0, name.buf);
520 } else {
521 hit |= grep_file(opt, name.buf);
522 }
523 } else if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
524 submodule_path_match(repo->index, pathspec, name.buf, NULL)) {
525 hit |= grep_submodule(opt, pathspec, NULL, ce->name,
526 ce->name, cached);
527 } else {
528 continue;
529 }
530
531 if (ce_stage(ce)) {
532 do {
533 nr++;
534 } while (nr < repo->index->cache_nr &&
535 !strcmp(ce->name, repo->index->cache[nr]->name));
536 nr--; /* compensate for loop control */
537 }
538 if (hit && opt->status_only)
539 break;
540 }
541
542 strbuf_release(&name);
543 return hit;
544 }
545
546 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
547 struct tree_desc *tree, struct strbuf *base, int tn_len,
548 int check_attr)
549 {
550 struct repository *repo = opt->repo;
551 int hit = 0;
552 enum interesting match = entry_not_interesting;
553 struct name_entry entry;
554 int old_baselen = base->len;
555 struct strbuf name = STRBUF_INIT;
556 int name_base_len = 0;
557 if (repo->submodule_prefix) {
558 strbuf_addstr(&name, repo->submodule_prefix);
559 name_base_len = name.len;
560 }
561
562 while (tree_entry(tree, &entry)) {
563 int te_len = tree_entry_len(&entry);
564
565 if (match != all_entries_interesting) {
566 strbuf_addstr(&name, base->buf + tn_len);
567 match = tree_entry_interesting(repo->index,
568 &entry, &name,
569 0, pathspec);
570 strbuf_setlen(&name, name_base_len);
571
572 if (match == all_entries_not_interesting)
573 break;
574 if (match == entry_not_interesting)
575 continue;
576 }
577
578 strbuf_add(base, entry.path, te_len);
579
580 if (S_ISREG(entry.mode)) {
581 hit |= grep_oid(opt, &entry.oid, base->buf, tn_len,
582 check_attr ? base->buf + tn_len : NULL);
583 } else if (S_ISDIR(entry.mode)) {
584 enum object_type type;
585 struct tree_desc sub;
586 void *data;
587 unsigned long size;
588
589 data = lock_and_read_oid_file(&entry.oid, &type, &size);
590 if (!data)
591 die(_("unable to read tree (%s)"),
592 oid_to_hex(&entry.oid));
593
594 strbuf_addch(base, '/');
595 init_tree_desc(&sub, data, size);
596 hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
597 check_attr);
598 free(data);
599 } else if (recurse_submodules && S_ISGITLINK(entry.mode)) {
600 hit |= grep_submodule(opt, pathspec, &entry.oid,
601 base->buf, base->buf + tn_len,
602 1); /* ignored */
603 }
604
605 strbuf_setlen(base, old_baselen);
606
607 if (hit && opt->status_only)
608 break;
609 }
610
611 strbuf_release(&name);
612 return hit;
613 }
614
615 static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
616 struct object *obj, const char *name, const char *path)
617 {
618 if (obj->type == OBJ_BLOB)
619 return grep_oid(opt, &obj->oid, name, 0, path);
620 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
621 struct tree_desc tree;
622 void *data;
623 unsigned long size;
624 struct strbuf base;
625 int hit, len;
626
627 grep_read_lock();
628 data = read_object_with_reference(&obj->oid, tree_type,
629 &size, NULL);
630 grep_read_unlock();
631
632 if (!data)
633 die(_("unable to read tree (%s)"), oid_to_hex(&obj->oid));
634
635 len = name ? strlen(name) : 0;
636 strbuf_init(&base, PATH_MAX + len + 1);
637 if (len) {
638 strbuf_add(&base, name, len);
639 strbuf_addch(&base, ':');
640 }
641 init_tree_desc(&tree, data, size);
642 hit = grep_tree(opt, pathspec, &tree, &base, base.len,
643 obj->type == OBJ_COMMIT);
644 strbuf_release(&base);
645 free(data);
646 return hit;
647 }
648 die(_("unable to grep from object of type %s"), type_name(obj->type));
649 }
650
651 static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
652 const struct object_array *list)
653 {
654 unsigned int i;
655 int hit = 0;
656 const unsigned int nr = list->nr;
657
658 for (i = 0; i < nr; i++) {
659 struct object *real_obj;
660 real_obj = deref_tag(opt->repo, list->objects[i].item,
661 NULL, 0);
662
663 /* load the gitmodules file for this rev */
664 if (recurse_submodules) {
665 submodule_free(opt->repo);
666 gitmodules_config_oid(&real_obj->oid);
667 }
668 if (grep_object(opt, pathspec, real_obj, list->objects[i].name,
669 list->objects[i].path)) {
670 hit = 1;
671 if (opt->status_only)
672 break;
673 }
674 }
675 return hit;
676 }
677
678 static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
679 int exc_std, int use_index)
680 {
681 struct dir_struct dir;
682 int i, hit = 0;
683
684 memset(&dir, 0, sizeof(dir));
685 if (!use_index)
686 dir.flags |= DIR_NO_GITLINKS;
687 if (exc_std)
688 setup_standard_excludes(&dir);
689
690 fill_directory(&dir, opt->repo->index, pathspec);
691 for (i = 0; i < dir.nr; i++) {
692 if (!dir_path_match(opt->repo->index, dir.entries[i], pathspec, 0, NULL))
693 continue;
694 hit |= grep_file(opt, dir.entries[i]->name);
695 if (hit && opt->status_only)
696 break;
697 }
698 return hit;
699 }
700
701 static int context_callback(const struct option *opt, const char *arg,
702 int unset)
703 {
704 struct grep_opt *grep_opt = opt->value;
705 int value;
706 const char *endp;
707
708 if (unset) {
709 grep_opt->pre_context = grep_opt->post_context = 0;
710 return 0;
711 }
712 value = strtol(arg, (char **)&endp, 10);
713 if (*endp) {
714 return error(_("switch `%c' expects a numerical value"),
715 opt->short_name);
716 }
717 grep_opt->pre_context = grep_opt->post_context = value;
718 return 0;
719 }
720
721 static int file_callback(const struct option *opt, const char *arg, int unset)
722 {
723 struct grep_opt *grep_opt = opt->value;
724 int from_stdin;
725 FILE *patterns;
726 int lno = 0;
727 struct strbuf sb = STRBUF_INIT;
728
729 BUG_ON_OPT_NEG(unset);
730
731 from_stdin = !strcmp(arg, "-");
732 patterns = from_stdin ? stdin : fopen(arg, "r");
733 if (!patterns)
734 die_errno(_("cannot open '%s'"), arg);
735 while (strbuf_getline(&sb, patterns) == 0) {
736 /* ignore empty line like grep does */
737 if (sb.len == 0)
738 continue;
739
740 append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
741 GREP_PATTERN);
742 }
743 if (!from_stdin)
744 fclose(patterns);
745 strbuf_release(&sb);
746 return 0;
747 }
748
749 static int not_callback(const struct option *opt, const char *arg, int unset)
750 {
751 struct grep_opt *grep_opt = opt->value;
752 BUG_ON_OPT_NEG(unset);
753 BUG_ON_OPT_ARG(arg);
754 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
755 return 0;
756 }
757
758 static int and_callback(const struct option *opt, const char *arg, int unset)
759 {
760 struct grep_opt *grep_opt = opt->value;
761 BUG_ON_OPT_NEG(unset);
762 BUG_ON_OPT_ARG(arg);
763 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
764 return 0;
765 }
766
767 static int open_callback(const struct option *opt, const char *arg, int unset)
768 {
769 struct grep_opt *grep_opt = opt->value;
770 BUG_ON_OPT_NEG(unset);
771 BUG_ON_OPT_ARG(arg);
772 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
773 return 0;
774 }
775
776 static int close_callback(const struct option *opt, const char *arg, int unset)
777 {
778 struct grep_opt *grep_opt = opt->value;
779 BUG_ON_OPT_NEG(unset);
780 BUG_ON_OPT_ARG(arg);
781 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
782 return 0;
783 }
784
785 static int pattern_callback(const struct option *opt, const char *arg,
786 int unset)
787 {
788 struct grep_opt *grep_opt = opt->value;
789 BUG_ON_OPT_NEG(unset);
790 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
791 return 0;
792 }
793
794 int cmd_grep(int argc, const char **argv, const char *prefix)
795 {
796 int hit = 0;
797 int cached = 0, untracked = 0, opt_exclude = -1;
798 int seen_dashdash = 0;
799 int external_grep_allowed__ignored;
800 const char *show_in_pager = NULL, *default_pager = "dummy";
801 struct grep_opt opt;
802 struct object_array list = OBJECT_ARRAY_INIT;
803 struct pathspec pathspec;
804 struct string_list path_list = STRING_LIST_INIT_NODUP;
805 int i;
806 int dummy;
807 int use_index = 1;
808 int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
809 int allow_revs;
810
811 struct option options[] = {
812 OPT_BOOL(0, "cached", &cached,
813 N_("search in index instead of in the work tree")),
814 OPT_NEGBIT(0, "no-index", &use_index,
815 N_("find in contents not managed by git"), 1),
816 OPT_BOOL(0, "untracked", &untracked,
817 N_("search in both tracked and untracked files")),
818 OPT_SET_INT(0, "exclude-standard", &opt_exclude,
819 N_("ignore files specified via '.gitignore'"), 1),
820 OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
821 N_("recursively search in each submodule")),
822 OPT_GROUP(""),
823 OPT_BOOL('v', "invert-match", &opt.invert,
824 N_("show non-matching lines")),
825 OPT_BOOL('i', "ignore-case", &opt.ignore_case,
826 N_("case insensitive matching")),
827 OPT_BOOL('w', "word-regexp", &opt.word_regexp,
828 N_("match patterns only at word boundaries")),
829 OPT_SET_INT('a', "text", &opt.binary,
830 N_("process binary files as text"), GREP_BINARY_TEXT),
831 OPT_SET_INT('I', NULL, &opt.binary,
832 N_("don't match patterns in binary files"),
833 GREP_BINARY_NOMATCH),
834 OPT_BOOL(0, "textconv", &opt.allow_textconv,
835 N_("process binary files with textconv filters")),
836 OPT_SET_INT('r', "recursive", &opt.max_depth,
837 N_("search in subdirectories (default)"), -1),
838 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"),
839 N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
840 NULL, 1 },
841 OPT_GROUP(""),
842 OPT_SET_INT('E', "extended-regexp", &pattern_type_arg,
843 N_("use extended POSIX regular expressions"),
844 GREP_PATTERN_TYPE_ERE),
845 OPT_SET_INT('G', "basic-regexp", &pattern_type_arg,
846 N_("use basic POSIX regular expressions (default)"),
847 GREP_PATTERN_TYPE_BRE),
848 OPT_SET_INT('F', "fixed-strings", &pattern_type_arg,
849 N_("interpret patterns as fixed strings"),
850 GREP_PATTERN_TYPE_FIXED),
851 OPT_SET_INT('P', "perl-regexp", &pattern_type_arg,
852 N_("use Perl-compatible regular expressions"),
853 GREP_PATTERN_TYPE_PCRE),
854 OPT_GROUP(""),
855 OPT_BOOL('n', "line-number", &opt.linenum, N_("show line numbers")),
856 OPT_BOOL(0, "column", &opt.columnnum, N_("show column number of first match")),
857 OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1),
858 OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1),
859 OPT_NEGBIT(0, "full-name", &opt.relative,
860 N_("show filenames relative to top directory"), 1),
861 OPT_BOOL('l', "files-with-matches", &opt.name_only,
862 N_("show only filenames instead of matching lines")),
863 OPT_BOOL(0, "name-only", &opt.name_only,
864 N_("synonym for --files-with-matches")),
865 OPT_BOOL('L', "files-without-match",
866 &opt.unmatch_name_only,
867 N_("show only the names of files without match")),
868 OPT_BOOL_F('z', "null", &opt.null_following_name,
869 N_("print NUL after filenames"),
870 PARSE_OPT_NOCOMPLETE),
871 OPT_BOOL('o', "only-matching", &opt.only_matching,
872 N_("show only matching parts of a line")),
873 OPT_BOOL('c', "count", &opt.count,
874 N_("show the number of matches instead of matching lines")),
875 OPT__COLOR(&opt.color, N_("highlight matches")),
876 OPT_BOOL(0, "break", &opt.file_break,
877 N_("print empty line between matches from different files")),
878 OPT_BOOL(0, "heading", &opt.heading,
879 N_("show filename only once above matches from same file")),
880 OPT_GROUP(""),
881 OPT_CALLBACK('C', "context", &opt, N_("n"),
882 N_("show <n> context lines before and after matches"),
883 context_callback),
884 OPT_INTEGER('B', "before-context", &opt.pre_context,
885 N_("show <n> context lines before matches")),
886 OPT_INTEGER('A', "after-context", &opt.post_context,
887 N_("show <n> context lines after matches")),
888 OPT_INTEGER(0, "threads", &num_threads,
889 N_("use <n> worker threads")),
890 OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
891 context_callback),
892 OPT_BOOL('p', "show-function", &opt.funcname,
893 N_("show a line with the function name before matches")),
894 OPT_BOOL('W', "function-context", &opt.funcbody,
895 N_("show the surrounding function")),
896 OPT_GROUP(""),
897 OPT_CALLBACK('f', NULL, &opt, N_("file"),
898 N_("read patterns from file"), file_callback),
899 { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"),
900 N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback },
901 { OPTION_CALLBACK, 0, "and", &opt, NULL,
902 N_("combine patterns specified with -e"),
903 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
904 OPT_BOOL(0, "or", &dummy, ""),
905 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
906 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
907 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
908 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
909 open_callback },
910 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
911 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
912 close_callback },
913 OPT__QUIET(&opt.status_only,
914 N_("indicate hit with exit status without output")),
915 OPT_BOOL(0, "all-match", &opt.all_match,
916 N_("show only matches from files that match all patterns")),
917 OPT_SET_INT_F(0, "debug", &opt.debug,
918 N_("show parse tree for grep expression"),
919 1, PARSE_OPT_HIDDEN),
920 OPT_GROUP(""),
921 { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
922 N_("pager"), N_("show matching files in the pager"),
923 PARSE_OPT_OPTARG | PARSE_OPT_NOCOMPLETE,
924 NULL, (intptr_t)default_pager },
925 OPT_BOOL_F(0, "ext-grep", &external_grep_allowed__ignored,
926 N_("allow calling of grep(1) (ignored by this build)"),
927 PARSE_OPT_NOCOMPLETE),
928 OPT_END()
929 };
930
931 init_grep_defaults(the_repository);
932 git_config(grep_cmd_config, NULL);
933 grep_init(&opt, the_repository, prefix);
934
935 /*
936 * If there is no -- then the paths must exist in the working
937 * tree. If there is no explicit pattern specified with -e or
938 * -f, we take the first unrecognized non option to be the
939 * pattern, but then what follows it must be zero or more
940 * valid refs up to the -- (if exists), and then existing
941 * paths. If there is an explicit pattern, then the first
942 * unrecognized non option is the beginning of the refs list
943 * that continues up to the -- (if exists), and then paths.
944 */
945 argc = parse_options(argc, argv, prefix, options, grep_usage,
946 PARSE_OPT_KEEP_DASHDASH |
947 PARSE_OPT_STOP_AT_NON_OPTION);
948 grep_commit_pattern_type(pattern_type_arg, &opt);
949
950 if (use_index && !startup_info->have_repository) {
951 int fallback = 0;
952 git_config_get_bool("grep.fallbacktonoindex", &fallback);
953 if (fallback)
954 use_index = 0;
955 else
956 /* die the same way as if we did it at the beginning */
957 setup_git_directory();
958 }
959
960 /*
961 * skip a -- separator; we know it cannot be
962 * separating revisions from pathnames if
963 * we haven't even had any patterns yet
964 */
965 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
966 argv++;
967 argc--;
968 }
969
970 /* First unrecognized non-option token */
971 if (argc > 0 && !opt.pattern_list) {
972 append_grep_pattern(&opt, argv[0], "command line", 0,
973 GREP_PATTERN);
974 argv++;
975 argc--;
976 }
977
978 if (show_in_pager == default_pager)
979 show_in_pager = git_pager(1);
980 if (show_in_pager) {
981 opt.color = 0;
982 opt.name_only = 1;
983 opt.null_following_name = 1;
984 opt.output_priv = &path_list;
985 opt.output = append_path;
986 string_list_append(&path_list, show_in_pager);
987 }
988
989 if (!opt.pattern_list)
990 die(_("no pattern given"));
991
992 /* --only-matching has no effect with --invert. */
993 if (opt.invert)
994 opt.only_matching = 0;
995
996 /*
997 * We have to find "--" in a separate pass, because its presence
998 * influences how we will parse arguments that come before it.
999 */
1000 for (i = 0; i < argc; i++) {
1001 if (!strcmp(argv[i], "--")) {
1002 seen_dashdash = 1;
1003 break;
1004 }
1005 }
1006
1007 /*
1008 * Resolve any rev arguments. If we have a dashdash, then everything up
1009 * to it must resolve as a rev. If not, then we stop at the first
1010 * non-rev and assume everything else is a path.
1011 */
1012 allow_revs = use_index && !untracked;
1013 for (i = 0; i < argc; i++) {
1014 const char *arg = argv[i];
1015 struct object_id oid;
1016 struct object_context oc;
1017 struct object *object;
1018
1019 if (!strcmp(arg, "--")) {
1020 i++;
1021 break;
1022 }
1023
1024 if (!allow_revs) {
1025 if (seen_dashdash)
1026 die(_("--no-index or --untracked cannot be used with revs"));
1027 break;
1028 }
1029
1030 if (get_oid_with_context(the_repository, arg,
1031 GET_OID_RECORD_PATH,
1032 &oid, &oc)) {
1033 if (seen_dashdash)
1034 die(_("unable to resolve revision: %s"), arg);
1035 break;
1036 }
1037
1038 object = parse_object_or_die(&oid, arg);
1039 if (!seen_dashdash)
1040 verify_non_filename(prefix, arg);
1041 add_object_array_with_path(object, arg, &list, oc.mode, oc.path);
1042 free(oc.path);
1043 }
1044
1045 /*
1046 * Anything left over is presumed to be a path. But in the non-dashdash
1047 * "do what I mean" case, we verify and complain when that isn't true.
1048 */
1049 if (!seen_dashdash) {
1050 int j;
1051 for (j = i; j < argc; j++)
1052 verify_filename(prefix, argv[j], j == i && allow_revs);
1053 }
1054
1055 parse_pathspec(&pathspec, 0,
1056 PATHSPEC_PREFER_CWD |
1057 (opt.max_depth != -1 ? PATHSPEC_MAXDEPTH_VALID : 0),
1058 prefix, argv + i);
1059 pathspec.max_depth = opt.max_depth;
1060 pathspec.recursive = 1;
1061 pathspec.recurse_submodules = !!recurse_submodules;
1062
1063 if (list.nr || cached || show_in_pager) {
1064 if (num_threads > 1)
1065 warning(_("invalid option combination, ignoring --threads"));
1066 num_threads = 1;
1067 } else if (!HAVE_THREADS && num_threads > 1) {
1068 warning(_("no threads support, ignoring --threads"));
1069 num_threads = 1;
1070 } else if (num_threads < 0)
1071 die(_("invalid number of threads specified (%d)"), num_threads);
1072 else if (num_threads == 0)
1073 num_threads = HAVE_THREADS ? GREP_NUM_THREADS_DEFAULT : 1;
1074
1075 if (num_threads > 1) {
1076 if (!HAVE_THREADS)
1077 BUG("Somebody got num_threads calculation wrong!");
1078 if (!(opt.name_only || opt.unmatch_name_only || opt.count)
1079 && (opt.pre_context || opt.post_context ||
1080 opt.file_break || opt.funcbody))
1081 skip_first_line = 1;
1082 start_threads(&opt);
1083 } else {
1084 /*
1085 * The compiled patterns on the main path are only
1086 * used when not using threading. Otherwise
1087 * start_threads() above calls compile_grep_patterns()
1088 * for each thread.
1089 */
1090 compile_grep_patterns(&opt);
1091 }
1092
1093 if (show_in_pager && (cached || list.nr))
1094 die(_("--open-files-in-pager only works on the worktree"));
1095
1096 if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
1097 const char *pager = path_list.items[0].string;
1098 int len = strlen(pager);
1099
1100 if (len > 4 && is_dir_sep(pager[len - 5]))
1101 pager += len - 4;
1102
1103 if (opt.ignore_case && !strcmp("less", pager))
1104 string_list_append(&path_list, "-I");
1105
1106 if (!strcmp("less", pager) || !strcmp("vi", pager)) {
1107 struct strbuf buf = STRBUF_INIT;
1108 strbuf_addf(&buf, "+/%s%s",
1109 strcmp("less", pager) ? "" : "*",
1110 opt.pattern_list->pattern);
1111 string_list_append(&path_list, buf.buf);
1112 strbuf_detach(&buf, NULL);
1113 }
1114 }
1115
1116 if (recurse_submodules && (!use_index || untracked))
1117 die(_("option not supported with --recurse-submodules"));
1118
1119 if (!show_in_pager && !opt.status_only)
1120 setup_pager();
1121
1122 if (!use_index && (untracked || cached))
1123 die(_("--cached or --untracked cannot be used with --no-index"));
1124
1125 if (!use_index || untracked) {
1126 int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
1127 hit = grep_directory(&opt, &pathspec, use_exclude, use_index);
1128 } else if (0 <= opt_exclude) {
1129 die(_("--[no-]exclude-standard cannot be used for tracked contents"));
1130 } else if (!list.nr) {
1131 if (!cached)
1132 setup_work_tree();
1133
1134 hit = grep_cache(&opt, &pathspec, cached);
1135 } else {
1136 if (cached)
1137 die(_("both --cached and trees are given"));
1138
1139 hit = grep_objects(&opt, &pathspec, &list);
1140 }
1141
1142 if (num_threads > 1)
1143 hit |= wait_all();
1144 if (hit && show_in_pager)
1145 run_pager(&opt, prefix);
1146 clear_pathspec(&pathspec);
1147 free_grep_patterns(&opt);
1148 return !hit;
1149 }