Merge branch 'maint-1.6.6' into maint
[git/git.git] / builtin-grep.c
CommitLineData
5010cb5f
JH
1/*
2 * Builtin "git grep"
3 *
4 * Copyright (c) 2006 Junio C Hamano
5 */
6#include "cache.h"
7#include "blob.h"
8#include "tree.h"
9#include "commit.h"
10#include "tag.h"
1362671f 11#include "tree-walk.h"
5010cb5f 12#include "builtin.h"
3e230fa1 13#include "parse-options.h"
60ecac98 14#include "userdiff.h"
83b5d2f5 15#include "grep.h"
493b7a08 16#include "quote.h"
5f7c643a 17
5b594f45
FK
18#ifndef NO_PTHREADS
19#include "thread-utils.h"
20#include <pthread.h>
21#endif
22
3e230fa1
RS
23static char const * const grep_usage[] = {
24 "git grep [options] [-e] <pattern> [<rev>...] [[--] path...]",
25 NULL
26};
27
5b594f45
FK
28static int use_threads = 1;
29
30#ifndef NO_PTHREADS
31#define THREADS 8
32static pthread_t threads[THREADS];
33
34static void *load_sha1(const unsigned char *sha1, unsigned long *size,
35 const char *name);
36static void *load_file(const char *filename, size_t *sz);
37
38enum work_type {WORK_SHA1, WORK_FILE};
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 */
44struct work_item
45{
46 enum work_type type;
47 char *name;
48
49 /* if type == WORK_SHA1, then 'identifier' is a SHA1,
50 * otherwise type == WORK_FILE, and 'identifier' is a NUL
51 * terminated filename.
52 */
53 void *identifier;
54 char done;
55 struct strbuf out;
56};
57
58/* In the range [todo_done, todo_start) in 'todo' we have work_items
59 * that have been or are processed by a consumer thread. We haven't
60 * written the result for these to stdout yet.
61 *
62 * The work_items in [todo_start, todo_end) are waiting to be picked
63 * up by a consumer thread.
64 *
65 * The ranges are modulo TODO_SIZE.
66 */
67#define TODO_SIZE 128
68static struct work_item todo[TODO_SIZE];
69static int todo_start;
70static int todo_end;
71static int todo_done;
72
73/* Has all work items been added? */
74static int all_work_added;
75
76/* This lock protects all the variables above. */
77static pthread_mutex_t grep_mutex;
78
79/* Used to serialize calls to read_sha1_file. */
80static pthread_mutex_t read_sha1_mutex;
81
82#define grep_lock() pthread_mutex_lock(&grep_mutex)
83#define grep_unlock() pthread_mutex_unlock(&grep_mutex)
84#define read_sha1_lock() pthread_mutex_lock(&read_sha1_mutex)
85#define read_sha1_unlock() pthread_mutex_unlock(&read_sha1_mutex)
86
87/* Signalled when a new work_item is added to todo. */
88static pthread_cond_t cond_add;
89
90/* Signalled when the result from one work_item is written to
91 * stdout.
92 */
93static pthread_cond_t cond_write;
94
95/* Signalled when we are finished with everything. */
96static pthread_cond_t cond_result;
97
98static void add_work(enum work_type type, char *name, void *id)
99{
100 grep_lock();
101
102 while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
103 pthread_cond_wait(&cond_write, &grep_mutex);
104 }
105
106 todo[todo_end].type = type;
107 todo[todo_end].name = name;
108 todo[todo_end].identifier = id;
109 todo[todo_end].done = 0;
110 strbuf_reset(&todo[todo_end].out);
111 todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
112
113 pthread_cond_signal(&cond_add);
114 grep_unlock();
115}
116
117static struct work_item *get_work(void)
118{
119 struct work_item *ret;
120
121 grep_lock();
122 while (todo_start == todo_end && !all_work_added) {
123 pthread_cond_wait(&cond_add, &grep_mutex);
124 }
125
126 if (todo_start == todo_end && all_work_added) {
127 ret = NULL;
128 } else {
129 ret = &todo[todo_start];
130 todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
131 }
132 grep_unlock();
133 return ret;
134}
135
136static void grep_sha1_async(struct grep_opt *opt, char *name,
137 const unsigned char *sha1)
138{
139 unsigned char *s;
140 s = xmalloc(20);
141 memcpy(s, sha1, 20);
142 add_work(WORK_SHA1, name, s);
143}
144
145static void grep_file_async(struct grep_opt *opt, char *name,
146 const char *filename)
147{
148 add_work(WORK_FILE, name, xstrdup(filename));
149}
150
151static void work_done(struct work_item *w)
152{
153 int old_done;
154
155 grep_lock();
156 w->done = 1;
157 old_done = todo_done;
158 for(; todo[todo_done].done && todo_done != todo_start;
159 todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
160 w = &todo[todo_done];
161 write_or_die(1, w->out.buf, w->out.len);
162 free(w->name);
163 free(w->identifier);
164 }
165
166 if (old_done != todo_done)
167 pthread_cond_signal(&cond_write);
168
169 if (all_work_added && todo_done == todo_end)
170 pthread_cond_signal(&cond_result);
171
172 grep_unlock();
173}
174
175static void *run(void *arg)
176{
177 int hit = 0;
178 struct grep_opt *opt = arg;
179
180 while (1) {
181 struct work_item *w = get_work();
182 if (!w)
183 break;
184
185 opt->output_priv = w;
186 if (w->type == WORK_SHA1) {
187 unsigned long sz;
188 void* data = load_sha1(w->identifier, &sz, w->name);
189
190 if (data) {
191 hit |= grep_buffer(opt, w->name, data, sz);
192 free(data);
193 }
194 } else if (w->type == WORK_FILE) {
195 size_t sz;
196 void* data = load_file(w->identifier, &sz);
197 if (data) {
198 hit |= grep_buffer(opt, w->name, data, sz);
199 free(data);
200 }
201 } else {
202 assert(0);
203 }
204
205 work_done(w);
206 }
bfac23d9
DM
207 free_grep_patterns(arg);
208 free(arg);
5b594f45
FK
209
210 return (void*) (intptr_t) hit;
211}
212
213static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
214{
215 struct work_item *w = opt->output_priv;
216 strbuf_add(&w->out, buf, size);
217}
218
219static void start_threads(struct grep_opt *opt)
220{
221 int i;
222
223 pthread_mutex_init(&grep_mutex, NULL);
224 pthread_mutex_init(&read_sha1_mutex, NULL);
225 pthread_cond_init(&cond_add, NULL);
226 pthread_cond_init(&cond_write, NULL);
227 pthread_cond_init(&cond_result, NULL);
228
229 for (i = 0; i < ARRAY_SIZE(todo); i++) {
230 strbuf_init(&todo[i].out, 0);
231 }
232
233 for (i = 0; i < ARRAY_SIZE(threads); i++) {
234 int err;
235 struct grep_opt *o = grep_opt_dup(opt);
236 o->output = strbuf_out;
237 compile_grep_patterns(o);
238 err = pthread_create(&threads[i], NULL, run, o);
239
240 if (err)
241 die("grep: failed to create thread: %s",
242 strerror(err));
243 }
244}
245
246static int wait_all(void)
247{
248 int hit = 0;
249 int i;
250
251 grep_lock();
252 all_work_added = 1;
253
254 /* Wait until all work is done. */
255 while (todo_done != todo_end)
256 pthread_cond_wait(&cond_result, &grep_mutex);
257
258 /* Wake up all the consumer threads so they can see that there
259 * is no more work to do.
260 */
261 pthread_cond_broadcast(&cond_add);
262 grep_unlock();
263
264 for (i = 0; i < ARRAY_SIZE(threads); i++) {
265 void *h;
266 pthread_join(threads[i], &h);
267 hit |= (int) (intptr_t) h;
268 }
269
270 pthread_mutex_destroy(&grep_mutex);
271 pthread_mutex_destroy(&read_sha1_mutex);
272 pthread_cond_destroy(&cond_add);
273 pthread_cond_destroy(&cond_write);
274 pthread_cond_destroy(&cond_result);
275
276 return hit;
277}
278#else /* !NO_PTHREADS */
279#define read_sha1_lock()
280#define read_sha1_unlock()
281
282static int wait_all(void)
283{
284 return 0;
285}
286#endif
287
7e8f59d5
RS
288static int grep_config(const char *var, const char *value, void *cb)
289{
290 struct grep_opt *opt = cb;
291
60ecac98
RS
292 switch (userdiff_config(var, value)) {
293 case 0: break;
294 case -1: return -1;
295 default: return 0;
296 }
297
fe3420b6 298 if (!strcmp(var, "color.grep")) {
7e8f59d5
RS
299 opt->color = git_config_colorbool(var, value, -1);
300 return 0;
301 }
fe3420b6 302 if (!strcmp(var, "color.grep.match")) {
7e8f59d5
RS
303 if (!value)
304 return config_error_nonbool(var);
305 color_parse(value, var, opt->color_match);
306 return 0;
307 }
308 return git_color_default_config(var, value, cb);
309}
310
a91f453f
MK
311/*
312 * Return non-zero if max_depth is negative or path has no more then max_depth
313 * slashes.
314 */
315static int accept_subdir(const char *path, int max_depth)
316{
317 if (max_depth < 0)
318 return 1;
319
320 while ((path = strchr(path, '/')) != NULL) {
321 max_depth--;
322 if (max_depth < 0)
323 return 0;
324 path++;
325 }
326 return 1;
327}
328
329/*
330 * Return non-zero if name is a subdirectory of match and is not too deep.
331 */
332static int is_subdir(const char *name, int namelen,
333 const char *match, int matchlen, int max_depth)
334{
335 if (matchlen > namelen || strncmp(name, match, matchlen))
336 return 0;
337
338 if (name[matchlen] == '\0') /* exact match */
339 return 1;
340
341 if (!matchlen || match[matchlen-1] == '/' || name[matchlen] == '/')
342 return accept_subdir(name + matchlen + 1, max_depth);
343
344 return 0;
345}
346
e0eb889f
JH
347/*
348 * git grep pathspecs are somewhat different from diff-tree pathspecs;
349 * pathname wildcards are allowed.
350 */
a91f453f 351static int pathspec_matches(const char **paths, const char *name, int max_depth)
5010cb5f 352{
e0eb889f 353 int namelen, i;
1362671f 354 if (!paths || !*paths)
a91f453f 355 return accept_subdir(name, max_depth);
5010cb5f 356 namelen = strlen(name);
1362671f
JH
357 for (i = 0; paths[i]; i++) {
358 const char *match = paths[i];
359 int matchlen = strlen(match);
1e3d90e0 360 const char *cp, *meta;
e0eb889f 361
a91f453f 362 if (is_subdir(name, namelen, match, matchlen, max_depth))
e0eb889f
JH
363 return 1;
364 if (!fnmatch(match, name, 0))
365 return 1;
366 if (name[namelen-1] != '/')
5010cb5f 367 continue;
e0eb889f 368
1e3d90e0 369 /* We are being asked if the directory ("name") is worth
e0eb889f
JH
370 * descending into.
371 *
372 * Find the longest leading directory name that does
373 * not have metacharacter in the pathspec; the name
374 * we are looking at must overlap with that directory.
5010cb5f 375 */
1e3d90e0 376 for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
e0eb889f 377 char ch = *cp;
1e3d90e0
JH
378 if (ch == '*' || ch == '[' || ch == '?') {
379 meta = cp;
5010cb5f 380 break;
1e3d90e0 381 }
e0eb889f 382 }
1e3d90e0
JH
383 if (!meta)
384 meta = cp; /* fully literal */
385
386 if (namelen <= meta - match) {
e0eb889f
JH
387 /* Looking at "Documentation/" and
388 * the pattern says "Documentation/howto/", or
1e3d90e0
JH
389 * "Documentation/diff*.txt". The name we
390 * have should match prefix.
e0eb889f
JH
391 */
392 if (!memcmp(match, name, namelen))
393 return 1;
1e3d90e0 394 continue;
e0eb889f 395 }
1e3d90e0
JH
396
397 if (meta - match < namelen) {
e0eb889f 398 /* Looking at "Documentation/howto/" and
1e3d90e0
JH
399 * the pattern says "Documentation/h*";
400 * match up to "Do.../h"; this avoids descending
401 * into "Documentation/technical/".
e0eb889f 402 */
1e3d90e0 403 if (!memcmp(match, name, meta - match))
e0eb889f 404 return 1;
1e3d90e0 405 continue;
e0eb889f 406 }
5010cb5f
JH
407 }
408 return 0;
409}
410
5b594f45
FK
411static void *load_sha1(const unsigned char *sha1, unsigned long *size,
412 const char *name)
5010cb5f 413{
21666f1a 414 enum object_type type;
5b594f45 415 char *data;
0d042fec 416
5b594f45
FK
417 read_sha1_lock();
418 data = read_sha1_file(sha1, &type, size);
419 read_sha1_unlock();
420
421 if (!data)
5010cb5f 422 error("'%s': unable to read %s", name, sha1_to_hex(sha1));
5b594f45
FK
423
424 return data;
425}
426
427static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
428 const char *filename, int tree_name_len)
429{
430 struct strbuf pathbuf = STRBUF_INIT;
431 char *name;
432
0d042fec 433 if (opt->relative && opt->prefix_length) {
5b594f45
FK
434 quote_path_relative(filename + tree_name_len, -1, &pathbuf,
435 opt->prefix);
436 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
437 } else {
438 strbuf_addstr(&pathbuf, filename);
439 }
440
441 name = strbuf_detach(&pathbuf, NULL);
442
443#ifndef NO_PTHREADS
444 if (use_threads) {
445 grep_sha1_async(opt, name, sha1);
446 return 0;
447 } else
448#endif
449 {
450 int hit;
451 unsigned long sz;
452 void *data = load_sha1(sha1, &sz, name);
453 if (!data)
454 hit = 0;
455 else
456 hit = grep_buffer(opt, name, data, sz);
457
458 free(data);
459 free(name);
460 return hit;
0d042fec 461 }
5010cb5f
JH
462}
463
5b594f45 464static void *load_file(const char *filename, size_t *sz)
5010cb5f
JH
465{
466 struct stat st;
5010cb5f 467 char *data;
5b594f45 468 int i;
dc49cd76 469
5010cb5f
JH
470 if (lstat(filename, &st) < 0) {
471 err_ret:
472 if (errno != ENOENT)
473 error("'%s': %s", filename, strerror(errno));
474 return 0;
475 }
5010cb5f
JH
476 if (!S_ISREG(st.st_mode))
477 return 0;
5b594f45 478 *sz = xsize_t(st.st_size);
5010cb5f
JH
479 i = open(filename, O_RDONLY);
480 if (i < 0)
481 goto err_ret;
5b594f45
FK
482 data = xmalloc(*sz + 1);
483 if (st.st_size != read_in_full(i, data, *sz)) {
5010cb5f
JH
484 error("'%s': short read %s", filename, strerror(errno));
485 close(i);
486 free(data);
487 return 0;
488 }
489 close(i);
5b594f45
FK
490 data[*sz] = 0;
491 return data;
492}
493
494static int grep_file(struct grep_opt *opt, const char *filename)
495{
496 struct strbuf buf = STRBUF_INIT;
497 char *name;
498
0d042fec 499 if (opt->relative && opt->prefix_length)
5b594f45
FK
500 quote_path_relative(filename, -1, &buf, opt->prefix);
501 else
502 strbuf_addstr(&buf, filename);
503 name = strbuf_detach(&buf, NULL);
504
505#ifndef NO_PTHREADS
506 if (use_threads) {
507 grep_file_async(opt, name, filename);
508 return 0;
509 } else
510#endif
511 {
512 int hit;
513 size_t sz;
514 void *data = load_file(filename, &sz);
515 if (!data)
516 hit = 0;
517 else
518 hit = grep_buffer(opt, name, data, sz);
519
520 free(data);
521 free(name);
522 return hit;
523 }
5010cb5f
JH
524}
525
bbc09c22 526static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
5010cb5f
JH
527{
528 int hit = 0;
529 int nr;
530 read_cache();
531
532 for (nr = 0; nr < active_nr; nr++) {
533 struct cache_entry *ce = active_cache[nr];
7a51ed66 534 if (!S_ISREG(ce->ce_mode))
5010cb5f 535 continue;
a91f453f 536 if (!pathspec_matches(paths, ce->name, opt->max_depth))
5010cb5f 537 continue;
57d43466
NTND
538 /*
539 * If CE_VALID is on, we assume worktree file and its cache entry
540 * are identical, even if worktree file has been modified, so use
541 * cache version instead
542 */
b4d1690d 543 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
36f2587f
JH
544 if (ce_stage(ce))
545 continue;
0d042fec 546 hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
36f2587f 547 }
5010cb5f
JH
548 else
549 hit |= grep_file(opt, ce->name);
36f2587f
JH
550 if (ce_stage(ce)) {
551 do {
552 nr++;
553 } while (nr < active_nr &&
554 !strcmp(ce->name, active_cache[nr]->name));
555 nr--; /* compensate for loop control */
556 }
c8610a2e
JH
557 if (hit && opt->status_only)
558 break;
5010cb5f 559 }
b48fb5b6 560 free_grep_patterns(opt);
5010cb5f
JH
561 return hit;
562}
563
1362671f 564static int grep_tree(struct grep_opt *opt, const char **paths,
5010cb5f
JH
565 struct tree_desc *tree,
566 const char *tree_name, const char *base)
567{
5010cb5f
JH
568 int len;
569 int hit = 0;
4c068a98 570 struct name_entry entry;
e0eb889f 571 char *down;
0d042fec 572 int tn_len = strlen(tree_name);
620e2bb9
DP
573 struct strbuf pathbuf;
574
575 strbuf_init(&pathbuf, PATH_MAX + tn_len);
5010cb5f 576
0d042fec 577 if (tn_len) {
620e2bb9
DP
578 strbuf_add(&pathbuf, tree_name, tn_len);
579 strbuf_addch(&pathbuf, ':');
580 tn_len = pathbuf.len;
5010cb5f 581 }
620e2bb9
DP
582 strbuf_addstr(&pathbuf, base);
583 len = pathbuf.len;
5010cb5f 584
4c068a98 585 while (tree_entry(tree, &entry)) {
620e2bb9
DP
586 int te_len = tree_entry_len(entry.path, entry.sha1);
587 pathbuf.len = len;
588 strbuf_add(&pathbuf, entry.path, te_len);
5010cb5f 589
4c068a98 590 if (S_ISDIR(entry.mode))
e0eb889f
JH
591 /* Match "abc/" against pathspec to
592 * decide if we want to descend into "abc"
593 * directory.
594 */
620e2bb9 595 strbuf_addch(&pathbuf, '/');
e0eb889f 596
620e2bb9 597 down = pathbuf.buf + tn_len;
a91f453f 598 if (!pathspec_matches(paths, down, opt->max_depth))
5010cb5f 599 ;
4c068a98 600 else if (S_ISREG(entry.mode))
620e2bb9 601 hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
4c068a98 602 else if (S_ISDIR(entry.mode)) {
21666f1a 603 enum object_type type;
5010cb5f
JH
604 struct tree_desc sub;
605 void *data;
6fda5e51
LT
606 unsigned long size;
607
5b594f45 608 read_sha1_lock();
6fda5e51 609 data = read_sha1_file(entry.sha1, &type, &size);
5b594f45
FK
610 read_sha1_unlock();
611
5010cb5f
JH
612 if (!data)
613 die("unable to read tree (%s)",
4c068a98 614 sha1_to_hex(entry.sha1));
6fda5e51 615 init_tree_desc(&sub, data, size);
1362671f 616 hit |= grep_tree(opt, paths, &sub, tree_name, down);
5010cb5f
JH
617 free(data);
618 }
c8610a2e
JH
619 if (hit && opt->status_only)
620 break;
5010cb5f 621 }
620e2bb9 622 strbuf_release(&pathbuf);
5010cb5f
JH
623 return hit;
624}
625
1362671f 626static int grep_object(struct grep_opt *opt, const char **paths,
5010cb5f
JH
627 struct object *obj, const char *name)
628{
1974632c 629 if (obj->type == OBJ_BLOB)
0d042fec 630 return grep_sha1(opt, obj->sha1, name, 0);
1974632c 631 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
5010cb5f
JH
632 struct tree_desc tree;
633 void *data;
6fda5e51 634 unsigned long size;
5010cb5f
JH
635 int hit;
636 data = read_object_with_reference(obj->sha1, tree_type,
6fda5e51 637 &size, NULL);
5010cb5f
JH
638 if (!data)
639 die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
6fda5e51 640 init_tree_desc(&tree, data, size);
1362671f 641 hit = grep_tree(opt, paths, &tree, name, "");
5010cb5f
JH
642 free(data);
643 return hit;
644 }
885a86ab 645 die("unable to grep from object of type %s", typename(obj->type));
5010cb5f
JH
646}
647
ff3c7f9a
RS
648static int context_callback(const struct option *opt, const char *arg,
649 int unset)
3e230fa1
RS
650{
651 struct grep_opt *grep_opt = opt->value;
652 int value;
653 const char *endp;
654
655 if (unset) {
656 grep_opt->pre_context = grep_opt->post_context = 0;
657 return 0;
658 }
659 value = strtol(arg, (char **)&endp, 10);
660 if (*endp) {
661 return error("switch `%c' expects a numerical value",
662 opt->short_name);
663 }
664 grep_opt->pre_context = grep_opt->post_context = value;
665 return 0;
666}
667
ff3c7f9a 668static int file_callback(const struct option *opt, const char *arg, int unset)
3e230fa1
RS
669{
670 struct grep_opt *grep_opt = opt->value;
671 FILE *patterns;
672 int lno = 0;
cfe370c6 673 struct strbuf sb = STRBUF_INIT;
3e230fa1
RS
674
675 patterns = fopen(arg, "r");
676 if (!patterns)
d824cbba 677 die_errno("cannot open '%s'", arg);
3e230fa1
RS
678 while (strbuf_getline(&sb, patterns, '\n') == 0) {
679 /* ignore empty line like grep does */
680 if (sb.len == 0)
681 continue;
682 append_grep_pattern(grep_opt, strbuf_detach(&sb, NULL), arg,
683 ++lno, GREP_PATTERN);
684 }
685 fclose(patterns);
686 strbuf_release(&sb);
687 return 0;
688}
689
ff3c7f9a 690static int not_callback(const struct option *opt, const char *arg, int unset)
3e230fa1
RS
691{
692 struct grep_opt *grep_opt = opt->value;
693 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
694 return 0;
695}
696
ff3c7f9a 697static int and_callback(const struct option *opt, const char *arg, int unset)
3e230fa1
RS
698{
699 struct grep_opt *grep_opt = opt->value;
700 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
701 return 0;
702}
703
ff3c7f9a 704static int open_callback(const struct option *opt, const char *arg, int unset)
3e230fa1
RS
705{
706 struct grep_opt *grep_opt = opt->value;
707 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
708 return 0;
709}
710
ff3c7f9a 711static int close_callback(const struct option *opt, const char *arg, int unset)
3e230fa1
RS
712{
713 struct grep_opt *grep_opt = opt->value;
714 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
715 return 0;
716}
717
ff3c7f9a
RS
718static int pattern_callback(const struct option *opt, const char *arg,
719 int unset)
3e230fa1
RS
720{
721 struct grep_opt *grep_opt = opt->value;
722 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
723 return 0;
724}
5010cb5f 725
ff3c7f9a 726static int help_callback(const struct option *opt, const char *arg, int unset)
3e230fa1
RS
727{
728 return -1;
729}
088b084b 730
a633fca0 731int cmd_grep(int argc, const char **argv, const char *prefix)
5010cb5f 732{
5010cb5f 733 int hit = 0;
5010cb5f 734 int cached = 0;
5acd64ed 735 int seen_dashdash = 0;
bbc09c22 736 int external_grep_allowed__ignored;
5010cb5f 737 struct grep_opt opt;
1f1e895f 738 struct object_array list = { 0, 0, NULL };
1362671f 739 const char **paths = NULL;
5acd64ed 740 int i;
3e230fa1
RS
741 int dummy;
742 struct option options[] = {
743 OPT_BOOLEAN(0, "cached", &cached,
744 "search in index instead of in the work tree"),
745 OPT_GROUP(""),
746 OPT_BOOLEAN('v', "invert-match", &opt.invert,
747 "show non-matching lines"),
5183bf67
BC
748 OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
749 "case insensitive matching"),
3e230fa1
RS
750 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
751 "match patterns only at word boundaries"),
752 OPT_SET_INT('a', "text", &opt.binary,
753 "process binary files as text", GREP_BINARY_TEXT),
754 OPT_SET_INT('I', NULL, &opt.binary,
755 "don't match patterns in binary files",
756 GREP_BINARY_NOMATCH),
a91f453f
MK
757 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
758 "descend at most <depth> levels", PARSE_OPT_NONEG,
759 NULL, 1 },
3e230fa1
RS
760 OPT_GROUP(""),
761 OPT_BIT('E', "extended-regexp", &opt.regflags,
762 "use extended POSIX regular expressions", REG_EXTENDED),
763 OPT_NEGBIT('G', "basic-regexp", &opt.regflags,
764 "use basic POSIX regular expressions (default)",
765 REG_EXTENDED),
766 OPT_BOOLEAN('F', "fixed-strings", &opt.fixed,
767 "interpret patterns as fixed strings"),
768 OPT_GROUP(""),
769 OPT_BOOLEAN('n', NULL, &opt.linenum, "show line numbers"),
770 OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
771 OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1),
772 OPT_NEGBIT(0, "full-name", &opt.relative,
773 "show filenames relative to top directory", 1),
774 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
775 "show only filenames instead of matching lines"),
776 OPT_BOOLEAN(0, "name-only", &opt.name_only,
777 "synonym for --files-with-matches"),
778 OPT_BOOLEAN('L', "files-without-match",
779 &opt.unmatch_name_only,
780 "show only the names of files without match"),
781 OPT_BOOLEAN('z', "null", &opt.null_following_name,
782 "print NUL after filenames"),
783 OPT_BOOLEAN('c', "count", &opt.count,
784 "show the number of matches instead of matching lines"),
785 OPT_SET_INT(0, "color", &opt.color, "highlight matches", 1),
786 OPT_GROUP(""),
787 OPT_CALLBACK('C', NULL, &opt, "n",
788 "show <n> context lines before and after matches",
789 context_callback),
790 OPT_INTEGER('B', NULL, &opt.pre_context,
791 "show <n> context lines before matches"),
792 OPT_INTEGER('A', NULL, &opt.post_context,
793 "show <n> context lines after matches"),
794 OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM",
795 context_callback),
2944e4e6
RS
796 OPT_BOOLEAN('p', "show-function", &opt.funcname,
797 "show a line with the function name before matches"),
3e230fa1
RS
798 OPT_GROUP(""),
799 OPT_CALLBACK('f', NULL, &opt, "file",
800 "read patterns from file", file_callback),
801 { OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
802 "match <pattern>", PARSE_OPT_NONEG, pattern_callback },
803 { OPTION_CALLBACK, 0, "and", &opt, NULL,
804 "combine patterns specified with -e",
805 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
806 OPT_BOOLEAN(0, "or", &dummy, ""),
807 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
808 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
809 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
810 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
811 open_callback },
812 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
813 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
814 close_callback },
4ff61c21 815 OPT_BOOLEAN('q', "quiet", &opt.status_only,
c8610a2e 816 "indicate hit with exit status without output"),
3e230fa1
RS
817 OPT_BOOLEAN(0, "all-match", &opt.all_match,
818 "show only matches from files that match all patterns"),
819 OPT_GROUP(""),
bbc09c22
JH
820 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed__ignored,
821 "allow calling of grep(1) (ignored by this build)"),
3e230fa1
RS
822 { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage",
823 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
824 OPT_END()
825 };
5010cb5f 826
9c855c31
JN
827 /*
828 * 'git grep -h', unlike 'git grep -h <pattern>', is a request
829 * to show usage information and exit.
830 */
831 if (argc == 2 && !strcmp(argv[1], "-h"))
832 usage_with_options(grep_usage, options);
833
5010cb5f 834 memset(&opt, 0, sizeof(opt));
493b7a08 835 opt.prefix = prefix;
0d042fec
JH
836 opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
837 opt.relative = 1;
7977f0ea 838 opt.pathname = 1;
f9b9faf6 839 opt.pattern_tail = &opt.pattern_list;
5010cb5f 840 opt.regflags = REG_NEWLINE;
a91f453f 841 opt.max_depth = -1;
5010cb5f 842
7e8f59d5
RS
843 strcpy(opt.color_match, GIT_COLOR_RED GIT_COLOR_BOLD);
844 opt.color = -1;
845 git_config(grep_config, &opt);
846 if (opt.color == -1)
847 opt.color = git_use_color_default;
848
5010cb5f 849 /*
5acd64ed
JH
850 * If there is no -- then the paths must exist in the working
851 * tree. If there is no explicit pattern specified with -e or
852 * -f, we take the first unrecognized non option to be the
853 * pattern, but then what follows it must be zero or more
854 * valid refs up to the -- (if exists), and then existing
855 * paths. If there is an explicit pattern, then the first
82e5a82f 856 * unrecognized non option is the beginning of the refs list
5acd64ed 857 * that continues up to the -- (if exists), and then paths.
5010cb5f 858 */
37782920 859 argc = parse_options(argc, argv, prefix, options, grep_usage,
3e230fa1
RS
860 PARSE_OPT_KEEP_DASHDASH |
861 PARSE_OPT_STOP_AT_NON_OPTION |
862 PARSE_OPT_NO_INTERNAL_HELP);
863
864 /* First unrecognized non-option token */
865 if (argc > 0 && !opt.pattern_list) {
866 append_grep_pattern(&opt, argv[0], "command line", 0,
867 GREP_PATTERN);
868 argv++;
869 argc--;
5010cb5f 870 }
5acd64ed 871
f9b9faf6 872 if (!opt.pattern_list)
5010cb5f 873 die("no pattern given.");
5183bf67
BC
874 if (!opt.fixed && opt.ignore_case)
875 opt.regflags |= REG_ICASE;
07ea91d8
JH
876 if ((opt.regflags != REG_NEWLINE) && opt.fixed)
877 die("cannot mix --fixed-strings and regexp");
5b594f45
FK
878
879#ifndef NO_PTHREADS
880 if (online_cpus() == 1 || !grep_threads_ok(&opt))
881 use_threads = 0;
882
883 if (use_threads)
884 start_threads(&opt);
885#else
886 use_threads = 0;
887#endif
888
83b5d2f5 889 compile_grep_patterns(&opt);
5acd64ed
JH
890
891 /* Check revs and then paths */
3e230fa1 892 for (i = 0; i < argc; i++) {
5acd64ed 893 const char *arg = argv[i];
1362671f 894 unsigned char sha1[20];
5acd64ed
JH
895 /* Is it a rev? */
896 if (!get_sha1(arg, sha1)) {
897 struct object *object = parse_object(sha1);
5acd64ed
JH
898 if (!object)
899 die("bad object %s", arg);
1f1e895f 900 add_object_array(object, arg, &list);
5acd64ed
JH
901 continue;
902 }
903 if (!strcmp(arg, "--")) {
904 i++;
905 seen_dashdash = 1;
906 }
907 break;
1362671f 908 }
5acd64ed
JH
909
910 /* The rest are paths */
911 if (!seen_dashdash) {
912 int j;
c39c4f47 913 for (j = i; j < argc; j++)
5acd64ed
JH
914 verify_filename(prefix, argv[j]);
915 }
916
493b7a08 917 if (i < argc)
5acd64ed 918 paths = get_pathspec(prefix, argv + i);
1362671f
JH
919 else if (prefix) {
920 paths = xcalloc(2, sizeof(const char *));
921 paths[0] = prefix;
922 paths[1] = NULL;
923 }
5010cb5f 924
6577f542 925 if (!list.nr) {
5b594f45 926 int hit;
6577f542
NTND
927 if (!cached)
928 setup_work_tree();
5b594f45
FK
929
930 hit = grep_cache(&opt, paths, cached);
931 if (use_threads)
932 hit |= wait_all();
933 return !hit;
6577f542 934 }
aa8c79ad 935
5010cb5f 936 if (cached)
aa8c79ad 937 die("both --cached and trees are given.");
5010cb5f 938
1f1e895f 939 for (i = 0; i < list.nr; i++) {
5010cb5f 940 struct object *real_obj;
1f1e895f 941 real_obj = deref_tag(list.objects[i].item, NULL, 0);
c8610a2e 942 if (grep_object(&opt, paths, real_obj, list.objects[i].name)) {
5010cb5f 943 hit = 1;
c8610a2e
JH
944 if (opt.status_only)
945 break;
946 }
5010cb5f 947 }
5b594f45
FK
948
949 if (use_threads)
950 hit |= wait_all();
b48fb5b6 951 free_grep_patterns(&opt);
5010cb5f
JH
952 return !hit;
953}