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 "grep.h"
14#include "quote.h"
15#ifndef NO_EXTERNAL_GREP
17#ifdef __unix__
18#define NO_EXTERNAL_GREP 0
19#else
20#define NO_EXTERNAL_GREP 1
21#endif
22#endif
23static int builtin_grep;
25static int grep_config(const char *var, const char *value, void *cb)
27{
28 struct grep_opt *opt = cb;
29 if (!strcmp(var, "color.grep")) {
31 opt->color = git_config_colorbool(var, value, -1);
32 return 0;
33 }
34 if (!strcmp(var, "color.grep.external"))
35 return git_config_string(&(opt->color_external), var, value);
36 if (!strcmp(var, "color.grep.match")) {
37 if (!value)
38 return config_error_nonbool(var);
39 color_parse(value, var, opt->color_match);
40 return 0;
41 }
42 return git_color_default_config(var, value, cb);
43}
44/*
46 * git grep pathspecs are somewhat different from diff-tree pathspecs;
47 * pathname wildcards are allowed.
48 */
49static int pathspec_matches(const char **paths, const char *name)
50{
51 int namelen, i;
52 if (!paths || !*paths)
53 return 1;
54 namelen = strlen(name);
55 for (i = 0; paths[i]; i++) {
56 const char *match = paths[i];
57 int matchlen = strlen(match);
58 const char *cp, *meta;
59 if (!matchlen ||
61 ((matchlen <= namelen) &&
62 !strncmp(name, match, matchlen) &&
63 (match[matchlen-1] == '/' ||
64 name[matchlen] == '\0' || name[matchlen] == '/')))
65 return 1;
66 if (!fnmatch(match, name, 0))
67 return 1;
68 if (name[namelen-1] != '/')
69 continue;
70 /* We are being asked if the directory ("name") is worth
72 * descending into.
73 *
74 * Find the longest leading directory name that does
75 * not have metacharacter in the pathspec; the name
76 * we are looking at must overlap with that directory.
77 */
78 for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
79 char ch = *cp;
80 if (ch == '*' || ch == '[' || ch == '?') {
81 meta = cp;
82 break;
83 }
84 }
85 if (!meta)
86 meta = cp; /* fully literal */
87 if (namelen <= meta - match) {
89 /* Looking at "Documentation/" and
90 * the pattern says "Documentation/howto/", or
91 * "Documentation/diff*.txt". The name we
92 * have should match prefix.
93 */
94 if (!memcmp(match, name, namelen))
95 return 1;
96 continue;
97 }
98 if (meta - match < namelen) {
100 /* Looking at "Documentation/howto/" and
101 * the pattern says "Documentation/h*";
102 * match up to "Do.../h"; this avoids descending
103 * into "Documentation/technical/".
104 */
105 if (!memcmp(match, name, meta - match))
106 return 1;
107 continue;
108 }
109 }
110 return 0;
111}
112static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char *name, int tree_name_len)
114{
115 unsigned long size;
116 char *data;
117 enum object_type type;
118 int hit;
119 struct strbuf pathbuf = STRBUF_INIT;
120 data = read_sha1_file(sha1, &type, &size);
122 if (!data) {
123 error("'%s': unable to read %s", name, sha1_to_hex(sha1));
124 return 0;
125 }
126 if (opt->relative && opt->prefix_length) {
127 quote_path_relative(name + tree_name_len, -1, &pathbuf, opt->prefix);
128 strbuf_insert(&pathbuf, 0, name, tree_name_len);
129 name = pathbuf.buf;
130 }
131 hit = grep_buffer(opt, name, data, size);
132 strbuf_release(&pathbuf);
133 free(data);
134 return hit;
135}
136static int grep_file(struct grep_opt *opt, const char *filename)
138{
139 struct stat st;
140 int i;
141 char *data;
142 size_t sz;
143 struct strbuf buf = STRBUF_INIT;
144 if (lstat(filename, &st) < 0) {
146 err_ret:
147 if (errno != ENOENT)
148 error("'%s': %s", filename, strerror(errno));
149 return 0;
150 }
151 if (!st.st_size)
152 return 0; /* empty file -- no grep hit */
153 if (!S_ISREG(st.st_mode))
154 return 0;
155 sz = xsize_t(st.st_size);
156 i = open(filename, O_RDONLY);
157 if (i < 0)
158 goto err_ret;
159 data = xmalloc(sz + 1);
160 if (st.st_size != read_in_full(i, data, sz)) {
161 error("'%s': short read %s", filename, strerror(errno));
162 close(i);
163 free(data);
164 return 0;
165 }
166 close(i);
167 if (opt->relative && opt->prefix_length)
168 filename = quote_path_relative(filename, -1, &buf, opt->prefix);
169 i = grep_buffer(opt, filename, data, sz);
170 strbuf_release(&buf);
171 free(data);
172 return i;
173}
174#if !NO_EXTERNAL_GREP
176static int exec_grep(int argc, const char **argv)
177{
178 pid_t pid;
179 int status;
180 argv[argc] = NULL;
182 pid = fork();
183 if (pid < 0)
184 return pid;
185 if (!pid) {
186 execvp("grep", (char **) argv);
187 exit(255);
188 }
189 while (waitpid(pid, &status, 0) < 0) {
190 if (errno == EINTR)
191 continue;
192 return -1;
193 }
194 if (WIFEXITED(status)) {
195 if (!WEXITSTATUS(status))
196 return 1;
197 return 0;
198 }
199 return -1;
200}
201#define MAXARGS 1000
203#define ARGBUF 4096
204#define push_arg(a) do { \
205 if (nr < MAXARGS) argv[nr++] = (a); \
206 else die("maximum number of args exceeded"); \
207 } while (0)
208/*
210 * If you send a singleton filename to grep, it does not give
211 * the name of the file. GNU grep has "-H" but we would want
212 * that behaviour in a portable way.
213 *
214 * So we keep two pathnames in argv buffer unsent to grep in
215 * the main loop if we need to do more than one grep.
216 */
217static int flush_grep(struct grep_opt *opt,
218 int argc, int arg0, const char **argv, int *kept)
219{
220 int status;
221 int count = argc - arg0;
222 const char *kept_0 = NULL;
223 if (count <= 2) {
225 /*
226 * Because we keep at least 2 paths in the call from
227 * the main loop (i.e. kept != NULL), and MAXARGS is
228 * far greater than 2, this usually is a call to
229 * conclude the grep. However, the user could attempt
230 * to overflow the argv buffer by giving too many
231 * options to leave very small number of real
232 * arguments even for the call in the main loop.
233 */
234 if (kept)
235 die("insanely many options to grep");
236 /*
238 * If we have two or more paths, we do not have to do
239 * anything special, but we need to push /dev/null to
240 * get "-H" behaviour of GNU grep portably but when we
241 * are not doing "-l" nor "-L" nor "-c".
242 */
243 if (count == 1 &&
244 !opt->name_only &&
245 !opt->unmatch_name_only &&
246 !opt->count) {
247 argv[argc++] = "/dev/null";
248 argv[argc] = NULL;
249 }
250 }
251 else if (kept) {
253 /*
254 * Called because we found many paths and haven't finished
255 * iterating over the cache yet. We keep two paths
256 * for the concluding call. argv[argc-2] and argv[argc-1]
257 * has the last two paths, so save the first one away,
258 * replace it with NULL while sending the list to grep,
259 * and recover them after we are done.
260 */
261 *kept = 2;
262 kept_0 = argv[argc-2];
263 argv[argc-2] = NULL;
264 argc -= 2;
265 }
266 status = exec_grep(argc, argv);
268 if (kept_0) {
270 /*
271 * Then recover them. Now the last arg is beyond the
272 * terminating NULL which is at argc, and the second
273 * from the last is what we saved away in kept_0
274 */
275 argv[arg0++] = kept_0;
276 argv[arg0] = argv[argc+1];
277 }
278 return status;
279}
280static void grep_add_color(struct strbuf *sb, const char *escape_seq)
282{
283 size_t orig_len = sb->len;
284 while (*escape_seq) {
286 if (*escape_seq == 'm')
287 strbuf_addch(sb, ';');
288 else if (*escape_seq != '\033' && *escape_seq != '[')
289 strbuf_addch(sb, *escape_seq);
290 escape_seq++;
291 }
292 if (sb->len > orig_len && sb->buf[sb->len - 1] == ';')
293 strbuf_setlen(sb, sb->len - 1);
294}
295static int external_grep(struct grep_opt *opt, const char **paths, int cached)
297{
298 int i, nr, argc, hit, len, status;
299 const char *argv[MAXARGS+1];
300 char randarg[ARGBUF];
301 char *argptr = randarg;
302 struct grep_pat *p;
303 if (opt->extended || (opt->relative && opt->prefix_length))
305 return -1;
306 len = nr = 0;
307 push_arg("grep");
308 if (opt->fixed)
309 push_arg("-F");
310 if (opt->linenum)
311 push_arg("-n");
312 if (!opt->pathname)
313 push_arg("-h");
314 if (opt->regflags & REG_EXTENDED)
315 push_arg("-E");
316 if (opt->regflags & REG_ICASE)
317 push_arg("-i");
318 if (opt->binary == GREP_BINARY_NOMATCH)
319 push_arg("-I");
320 if (opt->word_regexp)
321 push_arg("-w");
322 if (opt->name_only)
323 push_arg("-l");
324 if (opt->unmatch_name_only)
325 push_arg("-L");
326 if (opt->null_following_name)
327 /* in GNU grep git's "-z" translates to "-Z" */
328 push_arg("-Z");
329 if (opt->count)
330 push_arg("-c");
331 if (opt->post_context || opt->pre_context) {
332 if (opt->post_context != opt->pre_context) {
333 if (opt->pre_context) {
334 push_arg("-B");
335 len += snprintf(argptr, sizeof(randarg)-len,
336 "%u", opt->pre_context) + 1;
337 if (sizeof(randarg) <= len)
338 die("maximum length of args exceeded");
339 push_arg(argptr);
340 argptr += len;
341 }
342 if (opt->post_context) {
343 push_arg("-A");
344 len += snprintf(argptr, sizeof(randarg)-len,
345 "%u", opt->post_context) + 1;
346 if (sizeof(randarg) <= len)
347 die("maximum length of args exceeded");
348 push_arg(argptr);
349 argptr += len;
350 }
351 }
352 else {
353 push_arg("-C");
354 len += snprintf(argptr, sizeof(randarg)-len,
355 "%u", opt->post_context) + 1;
356 if (sizeof(randarg) <= len)
357 die("maximum length of args exceeded");
358 push_arg(argptr);
359 argptr += len;
360 }
361 }
362 for (p = opt->pattern_list; p; p = p->next) {
363 push_arg("-e");
364 push_arg(p->pattern);
365 }
366 if (opt->color) {
367 struct strbuf sb = STRBUF_INIT;
368 grep_add_color(&sb, opt->color_match);
370 setenv("GREP_COLOR", sb.buf, 1);
371 strbuf_reset(&sb);
373 strbuf_addstr(&sb, "mt=");
374 grep_add_color(&sb, opt->color_match);
375 strbuf_addstr(&sb, ":sl=:cx=:fn=:ln=:bn=:se=");
376 setenv("GREP_COLORS", sb.buf, 1);
377 strbuf_release(&sb);
379 if (opt->color_external && strlen(opt->color_external) > 0)
381 push_arg(opt->color_external);
382 }
383 hit = 0;
385 argc = nr;
386 for (i = 0; i < active_nr; i++) {
387 struct cache_entry *ce = active_cache[i];
388 char *name;
389 int kept;
390 if (!S_ISREG(ce->ce_mode))
391 continue;
392 if (!pathspec_matches(paths, ce->name))
393 continue;
394 name = ce->name;
395 if (name[0] == '-') {
396 int len = ce_namelen(ce);
397 name = xmalloc(len + 3);
398 memcpy(name, "./", 2);
399 memcpy(name + 2, ce->name, len + 1);
400 }
401 argv[argc++] = name;
402 if (MAXARGS <= argc) {
403 status = flush_grep(opt, argc, nr, argv, &kept);
404 if (0 < status)
405 hit = 1;
406 argc = nr + kept;
407 }
408 if (ce_stage(ce)) {
409 do {
410 i++;
411 } while (i < active_nr &&
412 !strcmp(ce->name, active_cache[i]->name));
413 i--; /* compensate for loop control */
414 }
415 }
416 if (argc > nr) {
417 status = flush_grep(opt, argc, nr, argv, NULL);
418 if (0 < status)
419 hit = 1;
420 }
421 return hit;
422}
423#endif
424static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
426{
427 int hit = 0;
428 int nr;
429 read_cache();
430#if !NO_EXTERNAL_GREP
432 /*
433 * Use the external "grep" command for the case where
434 * we grep through the checked-out files. It tends to
435 * be a lot more optimized
436 */
437 if (!cached && !builtin_grep) {
438 hit = external_grep(opt, paths, cached);
439 if (hit >= 0)
440 return hit;
441 hit = 0;
442 }
443#endif
444 for (nr = 0; nr < active_nr; nr++) {
446 struct cache_entry *ce = active_cache[nr];
447 if (!S_ISREG(ce->ce_mode))
448 continue;
449 if (!pathspec_matches(paths, ce->name))
450 continue;
451 /*
452 * If CE_VALID is on, we assume worktree file and its cache entry
453 * are identical, even if worktree file has been modified, so use
454 * cache version instead
455 */
456 if (cached || (ce->ce_flags & CE_VALID)) {
457 if (ce_stage(ce))
458 continue;
459 hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
460 }
461 else
462 hit |= grep_file(opt, ce->name);
463 if (ce_stage(ce)) {
464 do {
465 nr++;
466 } while (nr < active_nr &&
467 !strcmp(ce->name, active_cache[nr]->name));
468 nr--; /* compensate for loop control */
469 }
470 }
471 free_grep_patterns(opt);
472 return hit;
473}
474static int grep_tree(struct grep_opt *opt, const char **paths,
476 struct tree_desc *tree,
477 const char *tree_name, const char *base)
478{
479 int len;
480 int hit = 0;
481 struct name_entry entry;
482 char *down;
483 int tn_len = strlen(tree_name);
484 struct strbuf pathbuf;
485 strbuf_init(&pathbuf, PATH_MAX + tn_len);
487 if (tn_len) {
489 strbuf_add(&pathbuf, tree_name, tn_len);
490 strbuf_addch(&pathbuf, ':');
491 tn_len = pathbuf.len;
492 }
493 strbuf_addstr(&pathbuf, base);
494 len = pathbuf.len;
495 while (tree_entry(tree, &entry)) {
497 int te_len = tree_entry_len(entry.path, entry.sha1);
498 pathbuf.len = len;
499 strbuf_add(&pathbuf, entry.path, te_len);
500 if (S_ISDIR(entry.mode))
502 /* Match "abc/" against pathspec to
503 * decide if we want to descend into "abc"
504 * directory.
505 */
506 strbuf_addch(&pathbuf, '/');
507 down = pathbuf.buf + tn_len;
509 if (!pathspec_matches(paths, down))
510 ;
511 else if (S_ISREG(entry.mode))
512 hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
513 else if (S_ISDIR(entry.mode)) {
514 enum object_type type;
515 struct tree_desc sub;
516 void *data;
517 unsigned long size;
518 data = read_sha1_file(entry.sha1, &type, &size);
520 if (!data)
521 die("unable to read tree (%s)",
522 sha1_to_hex(entry.sha1));
523 init_tree_desc(&sub, data, size);
524 hit |= grep_tree(opt, paths, &sub, tree_name, down);
525 free(data);
526 }
527 }
528 strbuf_release(&pathbuf);
529 return hit;
530}
531static int grep_object(struct grep_opt *opt, const char **paths,
533 struct object *obj, const char *name)
534{
535 if (obj->type == OBJ_BLOB)
536 return grep_sha1(opt, obj->sha1, name, 0);
537 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
538 struct tree_desc tree;
539 void *data;
540 unsigned long size;
541 int hit;
542 data = read_object_with_reference(obj->sha1, tree_type,
543 &size, NULL);
544 if (!data)
545 die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
546 init_tree_desc(&tree, data, size);
547 hit = grep_tree(opt, paths, &tree, name, "");
548 free(data);
549 return hit;
550 }
551 die("unable to grep from object of type %s", typename(obj->type));
552}
553static const char builtin_grep_usage[] =
555"git grep <option>* [-e] <pattern> <rev>* [[--] <path>...]";
556static const char emsg_invalid_context_len[] =
558"%s: invalid context length argument";
559static const char emsg_missing_context_len[] =
560"missing context length argument";
561static const char emsg_missing_argument[] =
562"option requires an argument -%s";
563int cmd_grep(int argc, const char **argv, const char *prefix)
565{
566 int hit = 0;
567 int cached = 0;
568 int seen_dashdash = 0;
569 struct grep_opt opt;
570 struct object_array list = { 0, 0, NULL };
571 const char **paths = NULL;
572 int i;
573 memset(&opt, 0, sizeof(opt));
575 opt.prefix = prefix;
576 opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
577 opt.relative = 1;
578 opt.pathname = 1;
579 opt.pattern_tail = &opt.pattern_list;
580 opt.regflags = REG_NEWLINE;
581 strcpy(opt.color_match, GIT_COLOR_RED GIT_COLOR_BOLD);
583 opt.color = -1;
584 git_config(grep_config, &opt);
585 if (opt.color == -1)
586 opt.color = git_use_color_default;
587 /*
589 * If there is no -- then the paths must exist in the working
590 * tree. If there is no explicit pattern specified with -e or
591 * -f, we take the first unrecognized non option to be the
592 * pattern, but then what follows it must be zero or more
593 * valid refs up to the -- (if exists), and then existing
594 * paths. If there is an explicit pattern, then the first
595 * unrecognized non option is the beginning of the refs list
596 * that continues up to the -- (if exists), and then paths.
597 */
598 while (1 < argc) {
600 const char *arg = argv[1];
601 argc--; argv++;
602 if (!strcmp("--cached", arg)) {
603 cached = 1;
604 continue;
605 }
606 if (!strcmp("--no-ext-grep", arg)) {
607 builtin_grep = 1;
608 continue;
609 }
610 if (!strcmp("-a", arg) ||
611 !strcmp("--text", arg)) {
612 opt.binary = GREP_BINARY_TEXT;
613 continue;
614 }
615 if (!strcmp("-i", arg) ||
616 !strcmp("--ignore-case", arg)) {
617 opt.regflags |= REG_ICASE;
618 continue;
619 }
620 if (!strcmp("-I", arg)) {
621 opt.binary = GREP_BINARY_NOMATCH;
622 continue;
623 }
624 if (!strcmp("-v", arg) ||
625 !strcmp("--invert-match", arg)) {
626 opt.invert = 1;
627 continue;
628 }
629 if (!strcmp("-E", arg) ||
630 !strcmp("--extended-regexp", arg)) {
631 opt.regflags |= REG_EXTENDED;
632 continue;
633 }
634 if (!strcmp("-F", arg) ||
635 !strcmp("--fixed-strings", arg)) {
636 opt.fixed = 1;
637 continue;
638 }
639 if (!strcmp("-G", arg) ||
640 !strcmp("--basic-regexp", arg)) {
641 opt.regflags &= ~REG_EXTENDED;
642 continue;
643 }
644 if (!strcmp("-n", arg)) {
645 opt.linenum = 1;
646 continue;
647 }
648 if (!strcmp("-h", arg)) {
649 opt.pathname = 0;
650 continue;
651 }
652 if (!strcmp("-H", arg)) {
653 opt.pathname = 1;
654 continue;
655 }
656 if (!strcmp("-l", arg) ||
657 !strcmp("--name-only", arg) ||
658 !strcmp("--files-with-matches", arg)) {
659 opt.name_only = 1;
660 continue;
661 }
662 if (!strcmp("-L", arg) ||
663 !strcmp("--files-without-match", arg)) {
664 opt.unmatch_name_only = 1;
665 continue;
666 }
667 if (!strcmp("-z", arg) ||
668 !strcmp("--null", arg)) {
669 opt.null_following_name = 1;
670 continue;
671 }
672 if (!strcmp("-c", arg) ||
673 !strcmp("--count", arg)) {
674 opt.count = 1;
675 continue;
676 }
677 if (!strcmp("-w", arg) ||
678 !strcmp("--word-regexp", arg)) {
679 opt.word_regexp = 1;
680 continue;
681 }
682 if (!prefixcmp(arg, "-A") ||
683 !prefixcmp(arg, "-B") ||
684 !prefixcmp(arg, "-C") ||
685 (arg[0] == '-' && '1' <= arg[1] && arg[1] <= '9')) {
686 unsigned num;
687 const char *scan;
688 switch (arg[1]) {
689 case 'A': case 'B': case 'C':
690 if (!arg[2]) {
691 if (argc <= 1)
692 die(emsg_missing_context_len);
693 scan = *++argv;
694 argc--;
695 }
696 else
697 scan = arg + 2;
698 break;
699 default:
700 scan = arg + 1;
701 break;
702 }
703 if (strtoul_ui(scan, 10, &num))
704 die(emsg_invalid_context_len, scan);
705 switch (arg[1]) {
706 case 'A':
707 opt.post_context = num;
708 break;
709 default:
710 case 'C':
711 opt.post_context = num;
712 case 'B':
713 opt.pre_context = num;
714 break;
715 }
716 continue;
717 }
718 if (!strcmp("-f", arg)) {
719 FILE *patterns;
720 int lno = 0;
721 char buf[1024];
722 if (argc <= 1)
723 die(emsg_missing_argument, arg);
724 patterns = fopen(argv[1], "r");
725 if (!patterns)
726 die("'%s': %s", argv[1], strerror(errno));
727 while (fgets(buf, sizeof(buf), patterns)) {
728 int len = strlen(buf);
729 if (len && buf[len-1] == '\n')
730 buf[len-1] = 0;
731 /* ignore empty line like grep does */
732 if (!buf[0])
733 continue;
734 append_grep_pattern(&opt, xstrdup(buf),
735 argv[1], ++lno,
736 GREP_PATTERN);
737 }
738 fclose(patterns);
739 argv++;
740 argc--;
741 continue;
742 }
743 if (!strcmp("--not", arg)) {
744 append_grep_pattern(&opt, arg, "command line", 0,
745 GREP_NOT);
746 continue;
747 }
748 if (!strcmp("--and", arg)) {
749 append_grep_pattern(&opt, arg, "command line", 0,
750 GREP_AND);
751 continue;
752 }
753 if (!strcmp("--or", arg))
754 continue; /* no-op */
755 if (!strcmp("(", arg)) {
756 append_grep_pattern(&opt, arg, "command line", 0,
757 GREP_OPEN_PAREN);
758 continue;
759 }
760 if (!strcmp(")", arg)) {
761 append_grep_pattern(&opt, arg, "command line", 0,
762 GREP_CLOSE_PAREN);
763 continue;
764 }
765 if (!strcmp("--all-match", arg)) {
766 opt.all_match = 1;
767 continue;
768 }
769 if (!strcmp("-e", arg)) {
770 if (1 < argc) {
771 append_grep_pattern(&opt, argv[1],
772 "-e option", 0,
773 GREP_PATTERN);
774 argv++;
775 argc--;
776 continue;
777 }
778 die(emsg_missing_argument, arg);
779 }
780 if (!strcmp("--full-name", arg)) {
781 opt.relative = 0;
782 continue;
783 }
784 if (!strcmp("--color", arg)) {
785 opt.color = 1;
786 continue;
787 }
788 if (!strcmp("--no-color", arg)) {
789 opt.color = 0;
790 continue;
791 }
792 if (!strcmp("--", arg)) {
793 /* later processing wants to have this at argv[1] */
794 argv--;
795 argc++;
796 break;
797 }
798 if (*arg == '-')
799 usage(builtin_grep_usage);
800 /* First unrecognized non-option token */
802 if (!opt.pattern_list) {
803 append_grep_pattern(&opt, arg, "command line", 0,
804 GREP_PATTERN);
805 break;
806 }
807 else {
808 /* We are looking at the first path or rev;
809 * it is found at argv[1] after leaving the
810 * loop.
811 */
812 argc++; argv--;
813 break;
814 }
815 }
816 if (opt.color && !opt.color_external)
818 builtin_grep = 1;
819 if (!opt.pattern_list)
820 die("no pattern given.");
821 if ((opt.regflags != REG_NEWLINE) && opt.fixed)
822 die("cannot mix --fixed-strings and regexp");
823 compile_grep_patterns(&opt);
824 /* Check revs and then paths */
826 for (i = 1; i < argc; i++) {
827 const char *arg = argv[i];
828 unsigned char sha1[20];
829 /* Is it a rev? */
830 if (!get_sha1(arg, sha1)) {
831 struct object *object = parse_object(sha1);
832 if (!object)
833 die("bad object %s", arg);
834 add_object_array(object, arg, &list);
835 continue;
836 }
837 if (!strcmp(arg, "--")) {
838 i++;
839 seen_dashdash = 1;
840 }
841 break;
842 }
843 /* The rest are paths */
845 if (!seen_dashdash) {
846 int j;
847 for (j = i; j < argc; j++)
848 verify_filename(prefix, argv[j]);
849 }
850 if (i < argc)
852 paths = get_pathspec(prefix, argv + i);
853 else if (prefix) {
854 paths = xcalloc(2, sizeof(const char *));
855 paths[0] = prefix;
856 paths[1] = NULL;
857 }
858 if (!list.nr) {
860 if (!cached)
861 setup_work_tree();
862 return !grep_cache(&opt, paths, cached);
863 }
864 if (cached)
866 die("both --cached and trees are given.");
867 for (i = 0; i < list.nr; i++) {
869 struct object *real_obj;
870 real_obj = deref_tag(list.objects[i].item, NULL, 0);
871 if (grep_object(&opt, paths, real_obj, list.objects[i].name))
872 hit = 1;
873 }
874 free_grep_patterns(&opt);
875 return !hit;
876}