159e65d47a41b56634bc3fb480f9c051d40e692c
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"
11#include "tree-walk.h"
12#include "builtin.h"
13#include "parse-options.h"
14#include "string-list.h"
15#include "run-command.h"
16#include "userdiff.h"
17#include "grep.h"
18#include "quote.h"
19#include "dir.h"
20
21static char const * const grep_usage[] = {
22 N_("git grep [options] [-e] <pattern> [<rev>...] [[--] <path>...]"),
23 NULL
24};
25
26static int use_threads = 1;
27
28#ifndef NO_PTHREADS
29#define THREADS 8
30static pthread_t threads[THREADS];
31
32/* We use one producer thread and THREADS consumer
33 * threads. The producer adds struct work_items to 'todo' and the
34 * consumers pick work items from the same array.
35 */
36struct work_item {
37 struct grep_source source;
38 char done;
39 struct strbuf out;
40};
41
42/* In the range [todo_done, todo_start) in 'todo' we have work_items
43 * that have been or are processed by a consumer thread. We haven't
44 * written the result for these to stdout yet.
45 *
46 * The work_items in [todo_start, todo_end) are waiting to be picked
47 * up by a consumer thread.
48 *
49 * The ranges are modulo TODO_SIZE.
50 */
51#define TODO_SIZE 128
52static struct work_item todo[TODO_SIZE];
53static int todo_start;
54static int todo_end;
55static int todo_done;
56
57/* Has all work items been added? */
58static int all_work_added;
59
60/* This lock protects all the variables above. */
61static pthread_mutex_t grep_mutex;
62
63static inline void grep_lock(void)
64{
65 if (use_threads)
66 pthread_mutex_lock(&grep_mutex);
67}
68
69static inline void grep_unlock(void)
70{
71 if (use_threads)
72 pthread_mutex_unlock(&grep_mutex);
73}
74
75/* Signalled when a new work_item is added to todo. */
76static pthread_cond_t cond_add;
77
78/* Signalled when the result from one work_item is written to
79 * stdout.
80 */
81static pthread_cond_t cond_write;
82
83/* Signalled when we are finished with everything. */
84static pthread_cond_t cond_result;
85
86static int skip_first_line;
87
88static void add_work(struct grep_opt *opt, enum grep_source_type type,
89 const char *name, const char *path, const void *id)
90{
91 grep_lock();
92
93 while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
94 pthread_cond_wait(&cond_write, &grep_mutex);
95 }
96
97 grep_source_init(&todo[todo_end].source, type, name, path, id);
98 if (opt->binary != GREP_BINARY_TEXT)
99 grep_source_load_driver(&todo[todo_end].source);
100 todo[todo_end].done = 0;
101 strbuf_reset(&todo[todo_end].out);
102 todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
103
104 pthread_cond_signal(&cond_add);
105 grep_unlock();
106}
107
108static struct work_item *get_work(void)
109{
110 struct work_item *ret;
111
112 grep_lock();
113 while (todo_start == todo_end && !all_work_added) {
114 pthread_cond_wait(&cond_add, &grep_mutex);
115 }
116
117 if (todo_start == todo_end && all_work_added) {
118 ret = NULL;
119 } else {
120 ret = &todo[todo_start];
121 todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
122 }
123 grep_unlock();
124 return ret;
125}
126
127static void work_done(struct work_item *w)
128{
129 int old_done;
130
131 grep_lock();
132 w->done = 1;
133 old_done = todo_done;
134 for(; todo[todo_done].done && todo_done != todo_start;
135 todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
136 w = &todo[todo_done];
137 if (w->out.len) {
138 const char *p = w->out.buf;
139 size_t len = w->out.len;
140
141 /* Skip the leading hunk mark of the first file. */
142 if (skip_first_line) {
143 while (len) {
144 len--;
145 if (*p++ == '\n')
146 break;
147 }
148 skip_first_line = 0;
149 }
150
151 write_or_die(1, p, len);
152 }
153 grep_source_clear(&w->source);
154 }
155
156 if (old_done != todo_done)
157 pthread_cond_signal(&cond_write);
158
159 if (all_work_added && todo_done == todo_end)
160 pthread_cond_signal(&cond_result);
161
162 grep_unlock();
163}
164
165static void *run(void *arg)
166{
167 int hit = 0;
168 struct grep_opt *opt = arg;
169
170 while (1) {
171 struct work_item *w = get_work();
172 if (!w)
173 break;
174
175 opt->output_priv = w;
176 hit |= grep_source(opt, &w->source);
177 grep_source_clear_data(&w->source);
178 work_done(w);
179 }
180 free_grep_patterns(arg);
181 free(arg);
182
183 return (void*) (intptr_t) hit;
184}
185
186static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
187{
188 struct work_item *w = opt->output_priv;
189 strbuf_add(&w->out, buf, size);
190}
191
192static void start_threads(struct grep_opt *opt)
193{
194 int i;
195
196 pthread_mutex_init(&grep_mutex, NULL);
197 pthread_mutex_init(&grep_read_mutex, NULL);
198 pthread_mutex_init(&grep_attr_mutex, NULL);
199 pthread_cond_init(&cond_add, NULL);
200 pthread_cond_init(&cond_write, NULL);
201 pthread_cond_init(&cond_result, NULL);
202 grep_use_locks = 1;
203
204 for (i = 0; i < ARRAY_SIZE(todo); i++) {
205 strbuf_init(&todo[i].out, 0);
206 }
207
208 for (i = 0; i < ARRAY_SIZE(threads); i++) {
209 int err;
210 struct grep_opt *o = grep_opt_dup(opt);
211 o->output = strbuf_out;
212 o->debug = 0;
213 compile_grep_patterns(o);
214 err = pthread_create(&threads[i], NULL, run, o);
215
216 if (err)
217 die(_("grep: failed to create thread: %s"),
218 strerror(err));
219 }
220}
221
222static int wait_all(void)
223{
224 int hit = 0;
225 int i;
226
227 grep_lock();
228 all_work_added = 1;
229
230 /* Wait until all work is done. */
231 while (todo_done != todo_end)
232 pthread_cond_wait(&cond_result, &grep_mutex);
233
234 /* Wake up all the consumer threads so they can see that there
235 * is no more work to do.
236 */
237 pthread_cond_broadcast(&cond_add);
238 grep_unlock();
239
240 for (i = 0; i < ARRAY_SIZE(threads); i++) {
241 void *h;
242 pthread_join(threads[i], &h);
243 hit |= (int) (intptr_t) h;
244 }
245
246 pthread_mutex_destroy(&grep_mutex);
247 pthread_mutex_destroy(&grep_read_mutex);
248 pthread_mutex_destroy(&grep_attr_mutex);
249 pthread_cond_destroy(&cond_add);
250 pthread_cond_destroy(&cond_write);
251 pthread_cond_destroy(&cond_result);
252 grep_use_locks = 0;
253
254 return hit;
255}
256#else /* !NO_PTHREADS */
257
258static int wait_all(void)
259{
260 return 0;
261}
262#endif
263
264static int grep_cmd_config(const char *var, const char *value, void *cb)
265{
266 int st = grep_config(var, value, cb);
267 if (git_color_default_config(var, value, cb) < 0)
268 st = -1;
269 return st;
270}
271
272static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
273{
274 void *data;
275
276 grep_read_lock();
277 data = read_sha1_file(sha1, type, size);
278 grep_read_unlock();
279 return data;
280}
281
282static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
283 const char *filename, int tree_name_len,
284 const char *path)
285{
286 struct strbuf pathbuf = STRBUF_INIT;
287
288 if (opt->relative && opt->prefix_length) {
289 quote_path_relative(filename + tree_name_len, -1, &pathbuf,
290 opt->prefix);
291 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
292 } else {
293 strbuf_addstr(&pathbuf, filename);
294 }
295
296#ifndef NO_PTHREADS
297 if (use_threads) {
298 add_work(opt, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
299 strbuf_release(&pathbuf);
300 return 0;
301 } else
302#endif
303 {
304 struct grep_source gs;
305 int hit;
306
307 grep_source_init(&gs, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
308 strbuf_release(&pathbuf);
309 hit = grep_source(opt, &gs);
310
311 grep_source_clear(&gs);
312 return hit;
313 }
314}
315
316static int grep_file(struct grep_opt *opt, const char *filename)
317{
318 struct strbuf buf = STRBUF_INIT;
319
320 if (opt->relative && opt->prefix_length)
321 quote_path_relative(filename, -1, &buf, opt->prefix);
322 else
323 strbuf_addstr(&buf, filename);
324
325#ifndef NO_PTHREADS
326 if (use_threads) {
327 add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename);
328 strbuf_release(&buf);
329 return 0;
330 } else
331#endif
332 {
333 struct grep_source gs;
334 int hit;
335
336 grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename);
337 strbuf_release(&buf);
338 hit = grep_source(opt, &gs);
339
340 grep_source_clear(&gs);
341 return hit;
342 }
343}
344
345static void append_path(struct grep_opt *opt, const void *data, size_t len)
346{
347 struct string_list *path_list = opt->output_priv;
348
349 if (len == 1 && *(const char *)data == '\0')
350 return;
351 string_list_append(path_list, xstrndup(data, len));
352}
353
354static void run_pager(struct grep_opt *opt, const char *prefix)
355{
356 struct string_list *path_list = opt->output_priv;
357 const char **argv = xmalloc(sizeof(const char *) * (path_list->nr + 1));
358 int i, status;
359
360 for (i = 0; i < path_list->nr; i++)
361 argv[i] = path_list->items[i].string;
362 argv[path_list->nr] = NULL;
363
364 if (prefix && chdir(prefix))
365 die(_("Failed to chdir: %s"), prefix);
366 status = run_command_v_opt(argv, RUN_USING_SHELL);
367 if (status)
368 exit(status);
369 free(argv);
370}
371
372static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached)
373{
374 int hit = 0;
375 int nr;
376 read_cache();
377
378 for (nr = 0; nr < active_nr; nr++) {
379 struct cache_entry *ce = active_cache[nr];
380 if (!S_ISREG(ce->ce_mode))
381 continue;
382 if (!match_pathspec_depth(pathspec, ce->name, ce_namelen(ce), 0, NULL))
383 continue;
384 /*
385 * If CE_VALID is on, we assume worktree file and its cache entry
386 * are identical, even if worktree file has been modified, so use
387 * cache version instead
388 */
389 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
390 if (ce_stage(ce))
391 continue;
392 hit |= grep_sha1(opt, ce->sha1, ce->name, 0, ce->name);
393 }
394 else
395 hit |= grep_file(opt, ce->name);
396 if (ce_stage(ce)) {
397 do {
398 nr++;
399 } while (nr < active_nr &&
400 !strcmp(ce->name, active_cache[nr]->name));
401 nr--; /* compensate for loop control */
402 }
403 if (hit && opt->status_only)
404 break;
405 }
406 return hit;
407}
408
409static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
410 struct tree_desc *tree, struct strbuf *base, int tn_len,
411 int check_attr)
412{
413 int hit = 0;
414 enum interesting match = entry_not_interesting;
415 struct name_entry entry;
416 int old_baselen = base->len;
417
418 while (tree_entry(tree, &entry)) {
419 int te_len = tree_entry_len(&entry);
420
421 if (match != all_entries_interesting) {
422 match = tree_entry_interesting(&entry, base, tn_len, pathspec);
423 if (match == all_entries_not_interesting)
424 break;
425 if (match == entry_not_interesting)
426 continue;
427 }
428
429 strbuf_add(base, entry.path, te_len);
430
431 if (S_ISREG(entry.mode)) {
432 hit |= grep_sha1(opt, entry.sha1, base->buf, tn_len,
433 check_attr ? base->buf + tn_len : NULL);
434 }
435 else if (S_ISDIR(entry.mode)) {
436 enum object_type type;
437 struct tree_desc sub;
438 void *data;
439 unsigned long size;
440
441 data = lock_and_read_sha1_file(entry.sha1, &type, &size);
442 if (!data)
443 die(_("unable to read tree (%s)"),
444 sha1_to_hex(entry.sha1));
445
446 strbuf_addch(base, '/');
447 init_tree_desc(&sub, data, size);
448 hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
449 check_attr);
450 free(data);
451 }
452 strbuf_setlen(base, old_baselen);
453
454 if (hit && opt->status_only)
455 break;
456 }
457 return hit;
458}
459
460static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
461 struct object *obj, const char *name)
462{
463 if (obj->type == OBJ_BLOB)
464 return grep_sha1(opt, obj->sha1, name, 0, NULL);
465 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
466 struct tree_desc tree;
467 void *data;
468 unsigned long size;
469 struct strbuf base;
470 int hit, len;
471
472 grep_read_lock();
473 data = read_object_with_reference(obj->sha1, tree_type,
474 &size, NULL);
475 grep_read_unlock();
476
477 if (!data)
478 die(_("unable to read tree (%s)"), sha1_to_hex(obj->sha1));
479
480 len = name ? strlen(name) : 0;
481 strbuf_init(&base, PATH_MAX + len + 1);
482 if (len) {
483 strbuf_add(&base, name, len);
484 strbuf_addch(&base, ':');
485 }
486 init_tree_desc(&tree, data, size);
487 hit = grep_tree(opt, pathspec, &tree, &base, base.len,
488 obj->type == OBJ_COMMIT);
489 strbuf_release(&base);
490 free(data);
491 return hit;
492 }
493 die(_("unable to grep from object of type %s"), typename(obj->type));
494}
495
496static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
497 const struct object_array *list)
498{
499 unsigned int i;
500 int hit = 0;
501 const unsigned int nr = list->nr;
502
503 for (i = 0; i < nr; i++) {
504 struct object *real_obj;
505 real_obj = deref_tag(list->objects[i].item, NULL, 0);
506 if (grep_object(opt, pathspec, real_obj, list->objects[i].name)) {
507 hit = 1;
508 if (opt->status_only)
509 break;
510 }
511 }
512 return hit;
513}
514
515static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
516 int exc_std)
517{
518 struct dir_struct dir;
519 int i, hit = 0;
520
521 memset(&dir, 0, sizeof(dir));
522 if (exc_std)
523 setup_standard_excludes(&dir);
524
525 fill_directory(&dir, pathspec->raw);
526 for (i = 0; i < dir.nr; i++) {
527 const char *name = dir.entries[i]->name;
528 int namelen = strlen(name);
529 if (!match_pathspec_depth(pathspec, name, namelen, 0, NULL))
530 continue;
531 hit |= grep_file(opt, dir.entries[i]->name);
532 if (hit && opt->status_only)
533 break;
534 }
535 return hit;
536}
537
538static int context_callback(const struct option *opt, const char *arg,
539 int unset)
540{
541 struct grep_opt *grep_opt = opt->value;
542 int value;
543 const char *endp;
544
545 if (unset) {
546 grep_opt->pre_context = grep_opt->post_context = 0;
547 return 0;
548 }
549 value = strtol(arg, (char **)&endp, 10);
550 if (*endp) {
551 return error(_("switch `%c' expects a numerical value"),
552 opt->short_name);
553 }
554 grep_opt->pre_context = grep_opt->post_context = value;
555 return 0;
556}
557
558static int file_callback(const struct option *opt, const char *arg, int unset)
559{
560 struct grep_opt *grep_opt = opt->value;
561 int from_stdin = !strcmp(arg, "-");
562 FILE *patterns;
563 int lno = 0;
564 struct strbuf sb = STRBUF_INIT;
565
566 patterns = from_stdin ? stdin : fopen(arg, "r");
567 if (!patterns)
568 die_errno(_("cannot open '%s'"), arg);
569 while (strbuf_getline(&sb, patterns, '\n') == 0) {
570 /* ignore empty line like grep does */
571 if (sb.len == 0)
572 continue;
573
574 append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
575 GREP_PATTERN);
576 }
577 if (!from_stdin)
578 fclose(patterns);
579 strbuf_release(&sb);
580 return 0;
581}
582
583static int not_callback(const struct option *opt, const char *arg, int unset)
584{
585 struct grep_opt *grep_opt = opt->value;
586 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
587 return 0;
588}
589
590static int and_callback(const struct option *opt, const char *arg, int unset)
591{
592 struct grep_opt *grep_opt = opt->value;
593 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
594 return 0;
595}
596
597static int open_callback(const struct option *opt, const char *arg, int unset)
598{
599 struct grep_opt *grep_opt = opt->value;
600 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
601 return 0;
602}
603
604static int close_callback(const struct option *opt, const char *arg, int unset)
605{
606 struct grep_opt *grep_opt = opt->value;
607 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
608 return 0;
609}
610
611static int pattern_callback(const struct option *opt, const char *arg,
612 int unset)
613{
614 struct grep_opt *grep_opt = opt->value;
615 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
616 return 0;
617}
618
619static int help_callback(const struct option *opt, const char *arg, int unset)
620{
621 return -1;
622}
623
624int cmd_grep(int argc, const char **argv, const char *prefix)
625{
626 int hit = 0;
627 int cached = 0, untracked = 0, opt_exclude = -1;
628 int seen_dashdash = 0;
629 int external_grep_allowed__ignored;
630 const char *show_in_pager = NULL, *default_pager = "dummy";
631 struct grep_opt opt;
632 struct object_array list = OBJECT_ARRAY_INIT;
633 const char **paths = NULL;
634 struct pathspec pathspec;
635 struct string_list path_list = STRING_LIST_INIT_NODUP;
636 int i;
637 int dummy;
638 int use_index = 1;
639 int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
640
641 struct option options[] = {
642 OPT_BOOLEAN(0, "cached", &cached,
643 N_("search in index instead of in the work tree")),
644 OPT_NEGBIT(0, "no-index", &use_index,
645 N_("find in contents not managed by git"), 1),
646 OPT_BOOLEAN(0, "untracked", &untracked,
647 N_("search in both tracked and untracked files")),
648 OPT_SET_INT(0, "exclude-standard", &opt_exclude,
649 N_("search also in ignored files"), 1),
650 OPT_GROUP(""),
651 OPT_BOOLEAN('v', "invert-match", &opt.invert,
652 N_("show non-matching lines")),
653 OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
654 N_("case insensitive matching")),
655 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
656 N_("match patterns only at word boundaries")),
657 OPT_SET_INT('a', "text", &opt.binary,
658 N_("process binary files as text"), GREP_BINARY_TEXT),
659 OPT_SET_INT('I', NULL, &opt.binary,
660 N_("don't match patterns in binary files"),
661 GREP_BINARY_NOMATCH),
662 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"),
663 N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
664 NULL, 1 },
665 OPT_GROUP(""),
666 OPT_SET_INT('E', "extended-regexp", &pattern_type_arg,
667 N_("use extended POSIX regular expressions"),
668 GREP_PATTERN_TYPE_ERE),
669 OPT_SET_INT('G', "basic-regexp", &pattern_type_arg,
670 N_("use basic POSIX regular expressions (default)"),
671 GREP_PATTERN_TYPE_BRE),
672 OPT_SET_INT('F', "fixed-strings", &pattern_type_arg,
673 N_("interpret patterns as fixed strings"),
674 GREP_PATTERN_TYPE_FIXED),
675 OPT_SET_INT('P', "perl-regexp", &pattern_type_arg,
676 N_("use Perl-compatible regular expressions"),
677 GREP_PATTERN_TYPE_PCRE),
678 OPT_GROUP(""),
679 OPT_BOOLEAN('n', "line-number", &opt.linenum, N_("show line numbers")),
680 OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1),
681 OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1),
682 OPT_NEGBIT(0, "full-name", &opt.relative,
683 N_("show filenames relative to top directory"), 1),
684 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
685 N_("show only filenames instead of matching lines")),
686 OPT_BOOLEAN(0, "name-only", &opt.name_only,
687 N_("synonym for --files-with-matches")),
688 OPT_BOOLEAN('L', "files-without-match",
689 &opt.unmatch_name_only,
690 N_("show only the names of files without match")),
691 OPT_BOOLEAN('z', "null", &opt.null_following_name,
692 N_("print NUL after filenames")),
693 OPT_BOOLEAN('c', "count", &opt.count,
694 N_("show the number of matches instead of matching lines")),
695 OPT__COLOR(&opt.color, N_("highlight matches")),
696 OPT_BOOLEAN(0, "break", &opt.file_break,
697 N_("print empty line between matches from different files")),
698 OPT_BOOLEAN(0, "heading", &opt.heading,
699 N_("show filename only once above matches from same file")),
700 OPT_GROUP(""),
701 OPT_CALLBACK('C', "context", &opt, N_("n"),
702 N_("show <n> context lines before and after matches"),
703 context_callback),
704 OPT_INTEGER('B', "before-context", &opt.pre_context,
705 N_("show <n> context lines before matches")),
706 OPT_INTEGER('A', "after-context", &opt.post_context,
707 N_("show <n> context lines after matches")),
708 OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
709 context_callback),
710 OPT_BOOLEAN('p', "show-function", &opt.funcname,
711 N_("show a line with the function name before matches")),
712 OPT_BOOLEAN('W', "function-context", &opt.funcbody,
713 N_("show the surrounding function")),
714 OPT_GROUP(""),
715 OPT_CALLBACK('f', NULL, &opt, N_("file"),
716 N_("read patterns from file"), file_callback),
717 { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"),
718 N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback },
719 { OPTION_CALLBACK, 0, "and", &opt, NULL,
720 N_("combine patterns specified with -e"),
721 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
722 OPT_BOOLEAN(0, "or", &dummy, ""),
723 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
724 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
725 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
726 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
727 open_callback },
728 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
729 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
730 close_callback },
731 OPT__QUIET(&opt.status_only,
732 N_("indicate hit with exit status without output")),
733 OPT_BOOLEAN(0, "all-match", &opt.all_match,
734 N_("show only matches from files that match all patterns")),
735 { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
736 N_("show parse tree for grep expression"),
737 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
738 OPT_GROUP(""),
739 { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
740 N_("pager"), N_("show matching files in the pager"),
741 PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager },
742 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed__ignored,
743 N_("allow calling of grep(1) (ignored by this build)")),
744 { OPTION_CALLBACK, 0, "help-all", &options, NULL, N_("show usage"),
745 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
746 OPT_END()
747 };
748
749 /*
750 * 'git grep -h', unlike 'git grep -h <pattern>', is a request
751 * to show usage information and exit.
752 */
753 if (argc == 2 && !strcmp(argv[1], "-h"))
754 usage_with_options(grep_usage, options);
755
756 init_grep_defaults();
757 git_config(grep_cmd_config, NULL);
758 grep_init(&opt, prefix);
759
760 /*
761 * If there is no -- then the paths must exist in the working
762 * tree. If there is no explicit pattern specified with -e or
763 * -f, we take the first unrecognized non option to be the
764 * pattern, but then what follows it must be zero or more
765 * valid refs up to the -- (if exists), and then existing
766 * paths. If there is an explicit pattern, then the first
767 * unrecognized non option is the beginning of the refs list
768 * that continues up to the -- (if exists), and then paths.
769 */
770 argc = parse_options(argc, argv, prefix, options, grep_usage,
771 PARSE_OPT_KEEP_DASHDASH |
772 PARSE_OPT_STOP_AT_NON_OPTION |
773 PARSE_OPT_NO_INTERNAL_HELP);
774 grep_commit_pattern_type(pattern_type_arg, &opt);
775
776 if (use_index && !startup_info->have_repository)
777 /* die the same way as if we did it at the beginning */
778 setup_git_directory();
779
780 /*
781 * skip a -- separator; we know it cannot be
782 * separating revisions from pathnames if
783 * we haven't even had any patterns yet
784 */
785 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
786 argv++;
787 argc--;
788 }
789
790 /* First unrecognized non-option token */
791 if (argc > 0 && !opt.pattern_list) {
792 append_grep_pattern(&opt, argv[0], "command line", 0,
793 GREP_PATTERN);
794 argv++;
795 argc--;
796 }
797
798 if (show_in_pager == default_pager)
799 show_in_pager = git_pager(1);
800 if (show_in_pager) {
801 opt.color = 0;
802 opt.name_only = 1;
803 opt.null_following_name = 1;
804 opt.output_priv = &path_list;
805 opt.output = append_path;
806 string_list_append(&path_list, show_in_pager);
807 use_threads = 0;
808 }
809
810 if (!opt.pattern_list)
811 die(_("no pattern given."));
812 if (!opt.fixed && opt.ignore_case)
813 opt.regflags |= REG_ICASE;
814
815 compile_grep_patterns(&opt);
816
817 /* Check revs and then paths */
818 for (i = 0; i < argc; i++) {
819 const char *arg = argv[i];
820 unsigned char sha1[20];
821 /* Is it a rev? */
822 if (!get_sha1(arg, sha1)) {
823 struct object *object = parse_object_or_die(sha1, arg);
824 if (!seen_dashdash)
825 verify_non_filename(prefix, arg);
826 add_object_array(object, arg, &list);
827 continue;
828 }
829 if (!strcmp(arg, "--")) {
830 i++;
831 seen_dashdash = 1;
832 }
833 break;
834 }
835
836#ifndef NO_PTHREADS
837 if (list.nr || cached || online_cpus() == 1)
838 use_threads = 0;
839#else
840 use_threads = 0;
841#endif
842
843#ifndef NO_PTHREADS
844 if (use_threads) {
845 if (!(opt.name_only || opt.unmatch_name_only || opt.count)
846 && (opt.pre_context || opt.post_context ||
847 opt.file_break || opt.funcbody))
848 skip_first_line = 1;
849 start_threads(&opt);
850 }
851#endif
852
853 /* The rest are paths */
854 if (!seen_dashdash) {
855 int j;
856 for (j = i; j < argc; j++)
857 verify_filename(prefix, argv[j], j == i);
858 }
859
860 paths = get_pathspec(prefix, argv + i);
861 init_pathspec(&pathspec, paths);
862 pathspec.max_depth = opt.max_depth;
863 pathspec.recursive = 1;
864
865 if (show_in_pager && (cached || list.nr))
866 die(_("--open-files-in-pager only works on the worktree"));
867
868 if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
869 const char *pager = path_list.items[0].string;
870 int len = strlen(pager);
871
872 if (len > 4 && is_dir_sep(pager[len - 5]))
873 pager += len - 4;
874
875 if (!strcmp("less", pager) || !strcmp("vi", pager)) {
876 struct strbuf buf = STRBUF_INIT;
877 strbuf_addf(&buf, "+/%s%s",
878 strcmp("less", pager) ? "" : "*",
879 opt.pattern_list->pattern);
880 string_list_append(&path_list, buf.buf);
881 strbuf_detach(&buf, NULL);
882 }
883 }
884
885 if (!show_in_pager)
886 setup_pager();
887
888 if (!use_index && (untracked || cached))
889 die(_("--cached or --untracked cannot be used with --no-index."));
890
891 if (!use_index || untracked) {
892 int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
893 if (list.nr)
894 die(_("--no-index or --untracked cannot be used with revs."));
895 hit = grep_directory(&opt, &pathspec, use_exclude);
896 } else if (0 <= opt_exclude) {
897 die(_("--[no-]exclude-standard cannot be used for tracked contents."));
898 } else if (!list.nr) {
899 if (!cached)
900 setup_work_tree();
901
902 hit = grep_cache(&opt, &pathspec, cached);
903 } else {
904 if (cached)
905 die(_("both --cached and trees are given."));
906 hit = grep_objects(&opt, &pathspec, &list);
907 }
908
909 if (use_threads)
910 hit |= wait_all();
911 if (hit && show_in_pager)
912 run_pager(&opt, prefix);
913 free_grep_patterns(&opt);
914 return !hit;
915}