gitk: Second try to work around the command line limit on Windows
[git/dscho.git] / builtin / grep.c
blob8e928e217041a159f4a962f0883d740aa84536d7
1 /*
2 * Builtin "git grep"
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 "userdiff.h"
15 #include "grep.h"
16 #include "quote.h"
17 #include "dir.h"
19 #ifndef NO_PTHREADS
20 #include "thread-utils.h"
21 #include <pthread.h>
22 #endif
24 static char const * const grep_usage[] = {
25 "git grep [options] [-e] <pattern> [<rev>...] [[--] path...]",
26 NULL
29 static int use_threads = 1;
31 #ifndef NO_PTHREADS
32 #define THREADS 8
33 static pthread_t threads[THREADS];
35 static void *load_sha1(const unsigned char *sha1, unsigned long *size,
36 const char *name);
37 static void *load_file(const char *filename, size_t *sz);
39 enum work_type {WORK_SHA1, WORK_FILE};
41 /* We use one producer thread and THREADS consumer
42 * threads. The producer adds struct work_items to 'todo' and the
43 * consumers pick work items from the same array.
45 struct work_item
47 enum work_type type;
48 char *name;
50 /* if type == WORK_SHA1, then 'identifier' is a SHA1,
51 * otherwise type == WORK_FILE, and 'identifier' is a NUL
52 * terminated filename.
54 void *identifier;
55 char done;
56 struct strbuf out;
59 /* In the range [todo_done, todo_start) in 'todo' we have work_items
60 * that have been or are processed by a consumer thread. We haven't
61 * written the result for these to stdout yet.
63 * The work_items in [todo_start, todo_end) are waiting to be picked
64 * up by a consumer thread.
66 * The ranges are modulo TODO_SIZE.
68 #define TODO_SIZE 128
69 static struct work_item todo[TODO_SIZE];
70 static int todo_start;
71 static int todo_end;
72 static int todo_done;
74 /* Has all work items been added? */
75 static int all_work_added;
77 /* This lock protects all the variables above. */
78 static pthread_mutex_t grep_mutex;
80 /* Used to serialize calls to read_sha1_file. */
81 static pthread_mutex_t read_sha1_mutex;
83 #define grep_lock() pthread_mutex_lock(&grep_mutex)
84 #define grep_unlock() pthread_mutex_unlock(&grep_mutex)
85 #define read_sha1_lock() pthread_mutex_lock(&read_sha1_mutex)
86 #define read_sha1_unlock() pthread_mutex_unlock(&read_sha1_mutex)
88 /* Signalled when a new work_item is added to todo. */
89 static pthread_cond_t cond_add;
91 /* Signalled when the result from one work_item is written to
92 * stdout.
94 static pthread_cond_t cond_write;
96 /* Signalled when we are finished with everything. */
97 static pthread_cond_t cond_result;
99 static int print_hunk_marks_between_files;
100 static int printed_something;
102 static void add_work(enum work_type type, char *name, void *id)
104 grep_lock();
106 while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
107 pthread_cond_wait(&cond_write, &grep_mutex);
110 todo[todo_end].type = type;
111 todo[todo_end].name = name;
112 todo[todo_end].identifier = id;
113 todo[todo_end].done = 0;
114 strbuf_reset(&todo[todo_end].out);
115 todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
117 pthread_cond_signal(&cond_add);
118 grep_unlock();
121 static struct work_item *get_work(void)
123 struct work_item *ret;
125 grep_lock();
126 while (todo_start == todo_end && !all_work_added) {
127 pthread_cond_wait(&cond_add, &grep_mutex);
130 if (todo_start == todo_end && all_work_added) {
131 ret = NULL;
132 } else {
133 ret = &todo[todo_start];
134 todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
136 grep_unlock();
137 return ret;
140 static void grep_sha1_async(struct grep_opt *opt, char *name,
141 const unsigned char *sha1)
143 unsigned char *s;
144 s = xmalloc(20);
145 memcpy(s, sha1, 20);
146 add_work(WORK_SHA1, name, s);
149 static void grep_file_async(struct grep_opt *opt, char *name,
150 const char *filename)
152 add_work(WORK_FILE, name, xstrdup(filename));
155 static void work_done(struct work_item *w)
157 int old_done;
159 grep_lock();
160 w->done = 1;
161 old_done = todo_done;
162 for(; todo[todo_done].done && todo_done != todo_start;
163 todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
164 w = &todo[todo_done];
165 if (w->out.len) {
166 if (print_hunk_marks_between_files && printed_something)
167 write_or_die(1, "--\n", 3);
168 write_or_die(1, w->out.buf, w->out.len);
169 printed_something = 1;
171 free(w->name);
172 free(w->identifier);
175 if (old_done != todo_done)
176 pthread_cond_signal(&cond_write);
178 if (all_work_added && todo_done == todo_end)
179 pthread_cond_signal(&cond_result);
181 grep_unlock();
184 static void *run(void *arg)
186 int hit = 0;
187 struct grep_opt *opt = arg;
189 while (1) {
190 struct work_item *w = get_work();
191 if (!w)
192 break;
194 opt->output_priv = w;
195 if (w->type == WORK_SHA1) {
196 unsigned long sz;
197 void* data = load_sha1(w->identifier, &sz, w->name);
199 if (data) {
200 hit |= grep_buffer(opt, w->name, data, sz);
201 free(data);
203 } else if (w->type == WORK_FILE) {
204 size_t sz;
205 void* data = load_file(w->identifier, &sz);
206 if (data) {
207 hit |= grep_buffer(opt, w->name, data, sz);
208 free(data);
210 } else {
211 assert(0);
214 work_done(w);
216 free_grep_patterns(arg);
217 free(arg);
219 return (void*) (intptr_t) hit;
222 static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
224 struct work_item *w = opt->output_priv;
225 strbuf_add(&w->out, buf, size);
228 static void start_threads(struct grep_opt *opt)
230 int i;
232 pthread_mutex_init(&grep_mutex, NULL);
233 pthread_mutex_init(&read_sha1_mutex, NULL);
234 pthread_cond_init(&cond_add, NULL);
235 pthread_cond_init(&cond_write, NULL);
236 pthread_cond_init(&cond_result, NULL);
238 for (i = 0; i < ARRAY_SIZE(todo); i++) {
239 strbuf_init(&todo[i].out, 0);
242 for (i = 0; i < ARRAY_SIZE(threads); i++) {
243 int err;
244 struct grep_opt *o = grep_opt_dup(opt);
245 o->output = strbuf_out;
246 compile_grep_patterns(o);
247 err = pthread_create(&threads[i], NULL, run, o);
249 if (err)
250 die("grep: failed to create thread: %s",
251 strerror(err));
255 static int wait_all(void)
257 int hit = 0;
258 int i;
260 grep_lock();
261 all_work_added = 1;
263 /* Wait until all work is done. */
264 while (todo_done != todo_end)
265 pthread_cond_wait(&cond_result, &grep_mutex);
267 /* Wake up all the consumer threads so they can see that there
268 * is no more work to do.
270 pthread_cond_broadcast(&cond_add);
271 grep_unlock();
273 for (i = 0; i < ARRAY_SIZE(threads); i++) {
274 void *h;
275 pthread_join(threads[i], &h);
276 hit |= (int) (intptr_t) h;
279 pthread_mutex_destroy(&grep_mutex);
280 pthread_mutex_destroy(&read_sha1_mutex);
281 pthread_cond_destroy(&cond_add);
282 pthread_cond_destroy(&cond_write);
283 pthread_cond_destroy(&cond_result);
285 return hit;
287 #else /* !NO_PTHREADS */
288 #define read_sha1_lock()
289 #define read_sha1_unlock()
291 static int wait_all(void)
293 return 0;
295 #endif
297 static int grep_config(const char *var, const char *value, void *cb)
299 struct grep_opt *opt = cb;
300 char *color = NULL;
302 switch (userdiff_config(var, value)) {
303 case 0: break;
304 case -1: return -1;
305 default: return 0;
308 if (!strcmp(var, "color.grep"))
309 opt->color = git_config_colorbool(var, value, -1);
310 else if (!strcmp(var, "color.grep.context"))
311 color = opt->color_context;
312 else if (!strcmp(var, "color.grep.filename"))
313 color = opt->color_filename;
314 else if (!strcmp(var, "color.grep.function"))
315 color = opt->color_function;
316 else if (!strcmp(var, "color.grep.linenumber"))
317 color = opt->color_lineno;
318 else if (!strcmp(var, "color.grep.match"))
319 color = opt->color_match;
320 else if (!strcmp(var, "color.grep.selected"))
321 color = opt->color_selected;
322 else if (!strcmp(var, "color.grep.separator"))
323 color = opt->color_sep;
324 else
325 return git_color_default_config(var, value, cb);
326 if (color) {
327 if (!value)
328 return config_error_nonbool(var);
329 color_parse(value, var, color);
331 return 0;
335 * Return non-zero if max_depth is negative or path has no more then max_depth
336 * slashes.
338 static int accept_subdir(const char *path, int max_depth)
340 if (max_depth < 0)
341 return 1;
343 while ((path = strchr(path, '/')) != NULL) {
344 max_depth--;
345 if (max_depth < 0)
346 return 0;
347 path++;
349 return 1;
353 * Return non-zero if name is a subdirectory of match and is not too deep.
355 static int is_subdir(const char *name, int namelen,
356 const char *match, int matchlen, int max_depth)
358 if (matchlen > namelen || strncmp(name, match, matchlen))
359 return 0;
361 if (name[matchlen] == '\0') /* exact match */
362 return 1;
364 if (!matchlen || match[matchlen-1] == '/' || name[matchlen] == '/')
365 return accept_subdir(name + matchlen + 1, max_depth);
367 return 0;
371 * git grep pathspecs are somewhat different from diff-tree pathspecs;
372 * pathname wildcards are allowed.
374 static int pathspec_matches(const char **paths, const char *name, int max_depth)
376 int namelen, i;
377 if (!paths || !*paths)
378 return accept_subdir(name, max_depth);
379 namelen = strlen(name);
380 for (i = 0; paths[i]; i++) {
381 const char *match = paths[i];
382 int matchlen = strlen(match);
383 const char *cp, *meta;
385 if (is_subdir(name, namelen, match, matchlen, max_depth))
386 return 1;
387 if (!fnmatch(match, name, 0))
388 return 1;
389 if (name[namelen-1] != '/')
390 continue;
392 /* We are being asked if the directory ("name") is worth
393 * descending into.
395 * Find the longest leading directory name that does
396 * not have metacharacter in the pathspec; the name
397 * we are looking at must overlap with that directory.
399 for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
400 char ch = *cp;
401 if (ch == '*' || ch == '[' || ch == '?') {
402 meta = cp;
403 break;
406 if (!meta)
407 meta = cp; /* fully literal */
409 if (namelen <= meta - match) {
410 /* Looking at "Documentation/" and
411 * the pattern says "Documentation/howto/", or
412 * "Documentation/diff*.txt". The name we
413 * have should match prefix.
415 if (!memcmp(match, name, namelen))
416 return 1;
417 continue;
420 if (meta - match < namelen) {
421 /* Looking at "Documentation/howto/" and
422 * the pattern says "Documentation/h*";
423 * match up to "Do.../h"; this avoids descending
424 * into "Documentation/technical/".
426 if (!memcmp(match, name, meta - match))
427 return 1;
428 continue;
431 return 0;
434 static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
436 void *data;
438 if (use_threads) {
439 read_sha1_lock();
440 data = read_sha1_file(sha1, type, size);
441 read_sha1_unlock();
442 } else {
443 data = read_sha1_file(sha1, type, size);
445 return data;
448 static void *load_sha1(const unsigned char *sha1, unsigned long *size,
449 const char *name)
451 enum object_type type;
452 void *data = lock_and_read_sha1_file(sha1, &type, size);
454 if (!data)
455 error("'%s': unable to read %s", name, sha1_to_hex(sha1));
457 return data;
460 static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
461 const char *filename, int tree_name_len)
463 struct strbuf pathbuf = STRBUF_INIT;
464 char *name;
466 if (opt->relative && opt->prefix_length) {
467 quote_path_relative(filename + tree_name_len, -1, &pathbuf,
468 opt->prefix);
469 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
470 } else {
471 strbuf_addstr(&pathbuf, filename);
474 name = strbuf_detach(&pathbuf, NULL);
476 #ifndef NO_PTHREADS
477 if (use_threads) {
478 grep_sha1_async(opt, name, sha1);
479 return 0;
480 } else
481 #endif
483 int hit;
484 unsigned long sz;
485 void *data = load_sha1(sha1, &sz, name);
486 if (!data)
487 hit = 0;
488 else
489 hit = grep_buffer(opt, name, data, sz);
491 free(data);
492 free(name);
493 return hit;
497 static void *load_file(const char *filename, size_t *sz)
499 struct stat st;
500 char *data;
501 int i;
503 if (lstat(filename, &st) < 0) {
504 err_ret:
505 if (errno != ENOENT)
506 error("'%s': %s", filename, strerror(errno));
507 return 0;
509 if (!S_ISREG(st.st_mode))
510 return 0;
511 *sz = xsize_t(st.st_size);
512 i = open(filename, O_RDONLY);
513 if (i < 0)
514 goto err_ret;
515 data = xmalloc(*sz + 1);
516 if (st.st_size != read_in_full(i, data, *sz)) {
517 error("'%s': short read %s", filename, strerror(errno));
518 close(i);
519 free(data);
520 return 0;
522 close(i);
523 data[*sz] = 0;
524 return data;
527 static int grep_file(struct grep_opt *opt, const char *filename)
529 struct strbuf buf = STRBUF_INIT;
530 char *name;
532 if (opt->relative && opt->prefix_length)
533 quote_path_relative(filename, -1, &buf, opt->prefix);
534 else
535 strbuf_addstr(&buf, filename);
536 name = strbuf_detach(&buf, NULL);
538 #ifndef NO_PTHREADS
539 if (use_threads) {
540 grep_file_async(opt, name, filename);
541 return 0;
542 } else
543 #endif
545 int hit;
546 size_t sz;
547 void *data = load_file(filename, &sz);
548 if (!data)
549 hit = 0;
550 else
551 hit = grep_buffer(opt, name, data, sz);
553 free(data);
554 free(name);
555 return hit;
559 static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
561 int hit = 0;
562 int nr;
563 read_cache();
565 for (nr = 0; nr < active_nr; nr++) {
566 struct cache_entry *ce = active_cache[nr];
567 if (!S_ISREG(ce->ce_mode))
568 continue;
569 if (!pathspec_matches(paths, ce->name, opt->max_depth))
570 continue;
572 * If CE_VALID is on, we assume worktree file and its cache entry
573 * are identical, even if worktree file has been modified, so use
574 * cache version instead
576 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
577 if (ce_stage(ce))
578 continue;
579 hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
581 else
582 hit |= grep_file(opt, ce->name);
583 if (ce_stage(ce)) {
584 do {
585 nr++;
586 } while (nr < active_nr &&
587 !strcmp(ce->name, active_cache[nr]->name));
588 nr--; /* compensate for loop control */
590 if (hit && opt->status_only)
591 break;
593 free_grep_patterns(opt);
594 return hit;
597 static int grep_tree(struct grep_opt *opt, const char **paths,
598 struct tree_desc *tree,
599 const char *tree_name, const char *base)
601 int len;
602 int hit = 0;
603 struct name_entry entry;
604 char *down;
605 int tn_len = strlen(tree_name);
606 struct strbuf pathbuf;
608 strbuf_init(&pathbuf, PATH_MAX + tn_len);
610 if (tn_len) {
611 strbuf_add(&pathbuf, tree_name, tn_len);
612 strbuf_addch(&pathbuf, ':');
613 tn_len = pathbuf.len;
615 strbuf_addstr(&pathbuf, base);
616 len = pathbuf.len;
618 while (tree_entry(tree, &entry)) {
619 int te_len = tree_entry_len(entry.path, entry.sha1);
620 pathbuf.len = len;
621 strbuf_add(&pathbuf, entry.path, te_len);
623 if (S_ISDIR(entry.mode))
624 /* Match "abc/" against pathspec to
625 * decide if we want to descend into "abc"
626 * directory.
628 strbuf_addch(&pathbuf, '/');
630 down = pathbuf.buf + tn_len;
631 if (!pathspec_matches(paths, down, opt->max_depth))
633 else if (S_ISREG(entry.mode))
634 hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
635 else if (S_ISDIR(entry.mode)) {
636 enum object_type type;
637 struct tree_desc sub;
638 void *data;
639 unsigned long size;
641 data = lock_and_read_sha1_file(entry.sha1, &type, &size);
642 if (!data)
643 die("unable to read tree (%s)",
644 sha1_to_hex(entry.sha1));
645 init_tree_desc(&sub, data, size);
646 hit |= grep_tree(opt, paths, &sub, tree_name, down);
647 free(data);
649 if (hit && opt->status_only)
650 break;
652 strbuf_release(&pathbuf);
653 return hit;
656 static int grep_object(struct grep_opt *opt, const char **paths,
657 struct object *obj, const char *name)
659 if (obj->type == OBJ_BLOB)
660 return grep_sha1(opt, obj->sha1, name, 0);
661 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
662 struct tree_desc tree;
663 void *data;
664 unsigned long size;
665 int hit;
666 data = read_object_with_reference(obj->sha1, tree_type,
667 &size, NULL);
668 if (!data)
669 die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
670 init_tree_desc(&tree, data, size);
671 hit = grep_tree(opt, paths, &tree, name, "");
672 free(data);
673 return hit;
675 die("unable to grep from object of type %s", typename(obj->type));
678 static int grep_directory(struct grep_opt *opt, const char **paths)
680 struct dir_struct dir;
681 int i, hit = 0;
683 memset(&dir, 0, sizeof(dir));
684 setup_standard_excludes(&dir);
686 fill_directory(&dir, paths);
687 for (i = 0; i < dir.nr; i++) {
688 hit |= grep_file(opt, dir.entries[i]->name);
689 if (hit && opt->status_only)
690 break;
692 free_grep_patterns(opt);
693 return hit;
696 static int context_callback(const struct option *opt, const char *arg,
697 int unset)
699 struct grep_opt *grep_opt = opt->value;
700 int value;
701 const char *endp;
703 if (unset) {
704 grep_opt->pre_context = grep_opt->post_context = 0;
705 return 0;
707 value = strtol(arg, (char **)&endp, 10);
708 if (*endp) {
709 return error("switch `%c' expects a numerical value",
710 opt->short_name);
712 grep_opt->pre_context = grep_opt->post_context = value;
713 return 0;
716 static int file_callback(const struct option *opt, const char *arg, int unset)
718 struct grep_opt *grep_opt = opt->value;
719 FILE *patterns;
720 int lno = 0;
721 struct strbuf sb = STRBUF_INIT;
723 patterns = fopen(arg, "r");
724 if (!patterns)
725 die_errno("cannot open '%s'", arg);
726 while (strbuf_getline(&sb, patterns, '\n') == 0) {
727 /* ignore empty line like grep does */
728 if (sb.len == 0)
729 continue;
730 append_grep_pattern(grep_opt, strbuf_detach(&sb, NULL), arg,
731 ++lno, GREP_PATTERN);
733 fclose(patterns);
734 strbuf_release(&sb);
735 return 0;
738 static int not_callback(const struct option *opt, const char *arg, int unset)
740 struct grep_opt *grep_opt = opt->value;
741 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
742 return 0;
745 static int and_callback(const struct option *opt, const char *arg, int unset)
747 struct grep_opt *grep_opt = opt->value;
748 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
749 return 0;
752 static int open_callback(const struct option *opt, const char *arg, int unset)
754 struct grep_opt *grep_opt = opt->value;
755 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
756 return 0;
759 static int close_callback(const struct option *opt, const char *arg, int unset)
761 struct grep_opt *grep_opt = opt->value;
762 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
763 return 0;
766 static int pattern_callback(const struct option *opt, const char *arg,
767 int unset)
769 struct grep_opt *grep_opt = opt->value;
770 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
771 return 0;
774 static int help_callback(const struct option *opt, const char *arg, int unset)
776 return -1;
779 int cmd_grep(int argc, const char **argv, const char *prefix)
781 int hit = 0;
782 int cached = 0;
783 int seen_dashdash = 0;
784 int external_grep_allowed__ignored;
785 struct grep_opt opt;
786 struct object_array list = { 0, 0, NULL };
787 const char **paths = NULL;
788 int i;
789 int dummy;
790 int nongit = 0, use_index = 1;
791 struct option options[] = {
792 OPT_BOOLEAN(0, "cached", &cached,
793 "search in index instead of in the work tree"),
794 OPT_BOOLEAN(0, "index", &use_index,
795 "--no-index finds in contents not managed by git"),
796 OPT_GROUP(""),
797 OPT_BOOLEAN('v', "invert-match", &opt.invert,
798 "show non-matching lines"),
799 OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
800 "case insensitive matching"),
801 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
802 "match patterns only at word boundaries"),
803 OPT_SET_INT('a', "text", &opt.binary,
804 "process binary files as text", GREP_BINARY_TEXT),
805 OPT_SET_INT('I', NULL, &opt.binary,
806 "don't match patterns in binary files",
807 GREP_BINARY_NOMATCH),
808 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
809 "descend at most <depth> levels", PARSE_OPT_NONEG,
810 NULL, 1 },
811 OPT_GROUP(""),
812 OPT_BIT('E', "extended-regexp", &opt.regflags,
813 "use extended POSIX regular expressions", REG_EXTENDED),
814 OPT_NEGBIT('G', "basic-regexp", &opt.regflags,
815 "use basic POSIX regular expressions (default)",
816 REG_EXTENDED),
817 OPT_BOOLEAN('F', "fixed-strings", &opt.fixed,
818 "interpret patterns as fixed strings"),
819 OPT_GROUP(""),
820 OPT_BOOLEAN('n', NULL, &opt.linenum, "show line numbers"),
821 OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
822 OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1),
823 OPT_NEGBIT(0, "full-name", &opt.relative,
824 "show filenames relative to top directory", 1),
825 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
826 "show only filenames instead of matching lines"),
827 OPT_BOOLEAN(0, "name-only", &opt.name_only,
828 "synonym for --files-with-matches"),
829 OPT_BOOLEAN('L', "files-without-match",
830 &opt.unmatch_name_only,
831 "show only the names of files without match"),
832 OPT_BOOLEAN('z', "null", &opt.null_following_name,
833 "print NUL after filenames"),
834 OPT_BOOLEAN('c', "count", &opt.count,
835 "show the number of matches instead of matching lines"),
836 OPT__COLOR(&opt.color, "highlight matches"),
837 OPT_GROUP(""),
838 OPT_CALLBACK('C', NULL, &opt, "n",
839 "show <n> context lines before and after matches",
840 context_callback),
841 OPT_INTEGER('B', NULL, &opt.pre_context,
842 "show <n> context lines before matches"),
843 OPT_INTEGER('A', NULL, &opt.post_context,
844 "show <n> context lines after matches"),
845 OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM",
846 context_callback),
847 OPT_BOOLEAN('p', "show-function", &opt.funcname,
848 "show a line with the function name before matches"),
849 OPT_GROUP(""),
850 OPT_CALLBACK('f', NULL, &opt, "file",
851 "read patterns from file", file_callback),
852 { OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
853 "match <pattern>", PARSE_OPT_NONEG, pattern_callback },
854 { OPTION_CALLBACK, 0, "and", &opt, NULL,
855 "combine patterns specified with -e",
856 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
857 OPT_BOOLEAN(0, "or", &dummy, ""),
858 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
859 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
860 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
861 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
862 open_callback },
863 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
864 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
865 close_callback },
866 OPT_BOOLEAN('q', "quiet", &opt.status_only,
867 "indicate hit with exit status without output"),
868 OPT_BOOLEAN(0, "all-match", &opt.all_match,
869 "show only matches from files that match all patterns"),
870 OPT_GROUP(""),
871 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed__ignored,
872 "allow calling of grep(1) (ignored by this build)"),
873 { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage",
874 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
875 OPT_END()
878 prefix = setup_git_directory_gently(&nongit);
881 * 'git grep -h', unlike 'git grep -h <pattern>', is a request
882 * to show usage information and exit.
884 if (argc == 2 && !strcmp(argv[1], "-h"))
885 usage_with_options(grep_usage, options);
887 memset(&opt, 0, sizeof(opt));
888 opt.prefix = prefix;
889 opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
890 opt.relative = 1;
891 opt.pathname = 1;
892 opt.pattern_tail = &opt.pattern_list;
893 opt.header_tail = &opt.header_list;
894 opt.regflags = REG_NEWLINE;
895 opt.max_depth = -1;
897 strcpy(opt.color_context, "");
898 strcpy(opt.color_filename, "");
899 strcpy(opt.color_function, "");
900 strcpy(opt.color_lineno, "");
901 strcpy(opt.color_match, GIT_COLOR_BOLD_RED);
902 strcpy(opt.color_selected, "");
903 strcpy(opt.color_sep, GIT_COLOR_CYAN);
904 opt.color = -1;
905 git_config(grep_config, &opt);
906 if (opt.color == -1)
907 opt.color = git_use_color_default;
910 * If there is no -- then the paths must exist in the working
911 * tree. If there is no explicit pattern specified with -e or
912 * -f, we take the first unrecognized non option to be the
913 * pattern, but then what follows it must be zero or more
914 * valid refs up to the -- (if exists), and then existing
915 * paths. If there is an explicit pattern, then the first
916 * unrecognized non option is the beginning of the refs list
917 * that continues up to the -- (if exists), and then paths.
919 argc = parse_options(argc, argv, prefix, options, grep_usage,
920 PARSE_OPT_KEEP_DASHDASH |
921 PARSE_OPT_STOP_AT_NON_OPTION |
922 PARSE_OPT_NO_INTERNAL_HELP);
924 if (use_index && nongit)
925 /* die the same way as if we did it at the beginning */
926 setup_git_directory();
929 * skip a -- separator; we know it cannot be
930 * separating revisions from pathnames if
931 * we haven't even had any patterns yet
933 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
934 argv++;
935 argc--;
938 /* First unrecognized non-option token */
939 if (argc > 0 && !opt.pattern_list) {
940 append_grep_pattern(&opt, argv[0], "command line", 0,
941 GREP_PATTERN);
942 argv++;
943 argc--;
946 if (!opt.pattern_list)
947 die("no pattern given.");
948 if (!opt.fixed && opt.ignore_case)
949 opt.regflags |= REG_ICASE;
950 if ((opt.regflags != REG_NEWLINE) && opt.fixed)
951 die("cannot mix --fixed-strings and regexp");
953 #ifndef NO_PTHREADS
954 if (online_cpus() == 1 || !grep_threads_ok(&opt))
955 use_threads = 0;
957 if (use_threads) {
958 if (opt.pre_context || opt.post_context)
959 print_hunk_marks_between_files = 1;
960 start_threads(&opt);
962 #else
963 use_threads = 0;
964 #endif
966 compile_grep_patterns(&opt);
968 /* Check revs and then paths */
969 for (i = 0; i < argc; i++) {
970 const char *arg = argv[i];
971 unsigned char sha1[20];
972 /* Is it a rev? */
973 if (!get_sha1(arg, sha1)) {
974 struct object *object = parse_object(sha1);
975 if (!object)
976 die("bad object %s", arg);
977 add_object_array(object, arg, &list);
978 continue;
980 if (!strcmp(arg, "--")) {
981 i++;
982 seen_dashdash = 1;
984 break;
987 /* The rest are paths */
988 if (!seen_dashdash) {
989 int j;
990 for (j = i; j < argc; j++)
991 verify_filename(prefix, argv[j]);
994 if (i < argc)
995 paths = get_pathspec(prefix, argv + i);
996 else if (prefix) {
997 paths = xcalloc(2, sizeof(const char *));
998 paths[0] = prefix;
999 paths[1] = NULL;
1002 if (!use_index) {
1003 int hit;
1004 if (cached)
1005 die("--cached cannot be used with --no-index.");
1006 if (list.nr)
1007 die("--no-index cannot be used with revs.");
1008 hit = grep_directory(&opt, paths);
1009 if (use_threads)
1010 hit |= wait_all();
1011 return !hit;
1014 if (!list.nr) {
1015 int hit;
1016 if (!cached)
1017 setup_work_tree();
1019 hit = grep_cache(&opt, paths, cached);
1020 if (use_threads)
1021 hit |= wait_all();
1022 return !hit;
1025 if (cached)
1026 die("both --cached and trees are given.");
1028 for (i = 0; i < list.nr; i++) {
1029 struct object *real_obj;
1030 real_obj = deref_tag(list.objects[i].item, NULL, 0);
1031 if (grep_object(&opt, paths, real_obj, list.objects[i].name)) {
1032 hit = 1;
1033 if (opt.status_only)
1034 break;
1038 if (use_threads)
1039 hit |= wait_all();
1040 free_grep_patterns(&opt);
1041 return !hit;