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 "userdiff.h"
15#include "grep.h"
16#include "quote.h"
17#ifndef NO_EXTERNAL_GREP
19#ifdef __unix__
20#define NO_EXTERNAL_GREP 0
21#else
22#define NO_EXTERNAL_GREP 1
23#endif
24#endif
25static char const * const grep_usage[] = {
27 "git grep [options] [-e] <pattern> [<rev>...] [[--] path...]",
28 NULL
29};
30static int grep_config(const char *var, const char *value, void *cb)
32{
33 struct grep_opt *opt = cb;
34 switch (userdiff_config(var, value)) {
36 case 0: break;
37 case -1: return -1;
38 default: return 0;
39 }
40 if (!strcmp(var, "color.grep")) {
42 opt->color = git_config_colorbool(var, value, -1);
43 return 0;
44 }
45 if (!strcmp(var, "color.grep.external"))
46 return git_config_string(&(opt->color_external), var, value);
47 if (!strcmp(var, "color.grep.match")) {
48 if (!value)
49 return config_error_nonbool(var);
50 color_parse(value, var, opt->color_match);
51 return 0;
52 }
53 return git_color_default_config(var, value, cb);
54}
55/*
57 * Return non-zero if max_depth is negative or path has no more then max_depth
58 * slashes.
59 */
60static int accept_subdir(const char *path, int max_depth)
61{
62 if (max_depth < 0)
63 return 1;
64 while ((path = strchr(path, '/')) != NULL) {
66 max_depth--;
67 if (max_depth < 0)
68 return 0;
69 path++;
70 }
71 return 1;
72}
73/*
75 * Return non-zero if name is a subdirectory of match and is not too deep.
76 */
77static int is_subdir(const char *name, int namelen,
78 const char *match, int matchlen, int max_depth)
79{
80 if (matchlen > namelen || strncmp(name, match, matchlen))
81 return 0;
82 if (name[matchlen] == '\0') /* exact match */
84 return 1;
85 if (!matchlen || match[matchlen-1] == '/' || name[matchlen] == '/')
87 return accept_subdir(name + matchlen + 1, max_depth);
88 return 0;
90}
91/*
93 * git grep pathspecs are somewhat different from diff-tree pathspecs;
94 * pathname wildcards are allowed.
95 */
96static int pathspec_matches(const char **paths, const char *name, int max_depth)
97{
98 int namelen, i;
99 if (!paths || !*paths)
100 return accept_subdir(name, max_depth);
101 namelen = strlen(name);
102 for (i = 0; paths[i]; i++) {
103 const char *match = paths[i];
104 int matchlen = strlen(match);
105 const char *cp, *meta;
106 if (is_subdir(name, namelen, match, matchlen, max_depth))
108 return 1;
109 if (!fnmatch(match, name, 0))
110 return 1;
111 if (name[namelen-1] != '/')
112 continue;
113 /* We are being asked if the directory ("name") is worth
115 * descending into.
116 *
117 * Find the longest leading directory name that does
118 * not have metacharacter in the pathspec; the name
119 * we are looking at must overlap with that directory.
120 */
121 for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
122 char ch = *cp;
123 if (ch == '*' || ch == '[' || ch == '?') {
124 meta = cp;
125 break;
126 }
127 }
128 if (!meta)
129 meta = cp; /* fully literal */
130 if (namelen <= meta - match) {
132 /* Looking at "Documentation/" and
133 * the pattern says "Documentation/howto/", or
134 * "Documentation/diff*.txt". The name we
135 * have should match prefix.
136 */
137 if (!memcmp(match, name, namelen))
138 return 1;
139 continue;
140 }
141 if (meta - match < namelen) {
143 /* Looking at "Documentation/howto/" and
144 * the pattern says "Documentation/h*";
145 * match up to "Do.../h"; this avoids descending
146 * into "Documentation/technical/".
147 */
148 if (!memcmp(match, name, meta - match))
149 return 1;
150 continue;
151 }
152 }
153 return 0;
154}
155static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char *name, int tree_name_len)
157{
158 unsigned long size;
159 char *data;
160 enum object_type type;
161 int hit;
162 struct strbuf pathbuf = STRBUF_INIT;
163 data = read_sha1_file(sha1, &type, &size);
165 if (!data) {
166 error("'%s': unable to read %s", name, sha1_to_hex(sha1));
167 return 0;
168 }
169 if (opt->relative && opt->prefix_length) {
170 quote_path_relative(name + tree_name_len, -1, &pathbuf, opt->prefix);
171 strbuf_insert(&pathbuf, 0, name, tree_name_len);
172 name = pathbuf.buf;
173 }
174 hit = grep_buffer(opt, name, data, size);
175 strbuf_release(&pathbuf);
176 free(data);
177 return hit;
178}
179static int grep_file(struct grep_opt *opt, const char *filename)
181{
182 struct stat st;
183 int i;
184 char *data;
185 size_t sz;
186 struct strbuf buf = STRBUF_INIT;
187 if (lstat(filename, &st) < 0) {
189 err_ret:
190 if (errno != ENOENT)
191 error("'%s': %s", filename, strerror(errno));
192 return 0;
193 }
194 if (!st.st_size)
195 return 0; /* empty file -- no grep hit */
196 if (!S_ISREG(st.st_mode))
197 return 0;
198 sz = xsize_t(st.st_size);
199 i = open(filename, O_RDONLY);
200 if (i < 0)
201 goto err_ret;
202 data = xmalloc(sz + 1);
203 if (st.st_size != read_in_full(i, data, sz)) {
204 error("'%s': short read %s", filename, strerror(errno));
205 close(i);
206 free(data);
207 return 0;
208 }
209 close(i);
210 if (opt->relative && opt->prefix_length)
211 filename = quote_path_relative(filename, -1, &buf, opt->prefix);
212 i = grep_buffer(opt, filename, data, sz);
213 strbuf_release(&buf);
214 free(data);
215 return i;
216}
217#if !NO_EXTERNAL_GREP
219static int exec_grep(int argc, const char **argv)
220{
221 pid_t pid;
222 int status;
223 argv[argc] = NULL;
225 pid = fork();
226 if (pid < 0)
227 return pid;
228 if (!pid) {
229 execvp("grep", (char **) argv);
230 exit(255);
231 }
232 while (waitpid(pid, &status, 0) < 0) {
233 if (errno == EINTR)
234 continue;
235 return -1;
236 }
237 if (WIFEXITED(status)) {
238 if (!WEXITSTATUS(status))
239 return 1;
240 return 0;
241 }
242 return -1;
243}
244#define MAXARGS 1000
246#define ARGBUF 4096
247#define push_arg(a) do { \
248 if (nr < MAXARGS) argv[nr++] = (a); \
249 else die("maximum number of args exceeded"); \
250 } while (0)
251/*
253 * If you send a singleton filename to grep, it does not give
254 * the name of the file. GNU grep has "-H" but we would want
255 * that behaviour in a portable way.
256 *
257 * So we keep two pathnames in argv buffer unsent to grep in
258 * the main loop if we need to do more than one grep.
259 */
260static int flush_grep(struct grep_opt *opt,
261 int argc, int arg0, const char **argv, int *kept)
262{
263 int status;
264 int count = argc - arg0;
265 const char *kept_0 = NULL;
266 if (count <= 2) {
268 /*
269 * Because we keep at least 2 paths in the call from
270 * the main loop (i.e. kept != NULL), and MAXARGS is
271 * far greater than 2, this usually is a call to
272 * conclude the grep. However, the user could attempt
273 * to overflow the argv buffer by giving too many
274 * options to leave very small number of real
275 * arguments even for the call in the main loop.
276 */
277 if (kept)
278 die("insanely many options to grep");
279 /*
281 * If we have two or more paths, we do not have to do
282 * anything special, but we need to push /dev/null to
283 * get "-H" behaviour of GNU grep portably but when we
284 * are not doing "-l" nor "-L" nor "-c".
285 */
286 if (count == 1 &&
287 !opt->name_only &&
288 !opt->unmatch_name_only &&
289 !opt->count) {
290 argv[argc++] = "/dev/null";
291 argv[argc] = NULL;
292 }
293 }
294 else if (kept) {
296 /*
297 * Called because we found many paths and haven't finished
298 * iterating over the cache yet. We keep two paths
299 * for the concluding call. argv[argc-2] and argv[argc-1]
300 * has the last two paths, so save the first one away,
301 * replace it with NULL while sending the list to grep,
302 * and recover them after we are done.
303 */
304 *kept = 2;
305 kept_0 = argv[argc-2];
306 argv[argc-2] = NULL;
307 argc -= 2;
308 }
309 if (opt->pre_context || opt->post_context) {
311 /*
312 * grep handles hunk marks between files, but we need to
313 * do that ourselves between multiple calls.
314 */
315 if (opt->show_hunk_mark)
316 write_or_die(1, "--\n", 3);
317 else
318 opt->show_hunk_mark = 1;
319 }
320 status = exec_grep(argc, argv);
322 if (kept_0) {
324 /*
325 * Then recover them. Now the last arg is beyond the
326 * terminating NULL which is at argc, and the second
327 * from the last is what we saved away in kept_0
328 */
329 argv[arg0++] = kept_0;
330 argv[arg0] = argv[argc+1];
331 }
332 return status;
333}
334static void grep_add_color(struct strbuf *sb, const char *escape_seq)
336{
337 size_t orig_len = sb->len;
338 while (*escape_seq) {
340 if (*escape_seq == 'm')
341 strbuf_addch(sb, ';');
342 else if (*escape_seq != '\033' && *escape_seq != '[')
343 strbuf_addch(sb, *escape_seq);
344 escape_seq++;
345 }
346 if (sb->len > orig_len && sb->buf[sb->len - 1] == ';')
347 strbuf_setlen(sb, sb->len - 1);
348}
349static int external_grep(struct grep_opt *opt, const char **paths, int cached)
351{
352 int i, nr, argc, hit, len, status;
353 const char *argv[MAXARGS+1];
354 char randarg[ARGBUF];
355 char *argptr = randarg;
356 struct grep_pat *p;
357 if (opt->extended || (opt->relative && opt->prefix_length))
359 return -1;
360 len = nr = 0;
361 push_arg("grep");
362 if (opt->fixed)
363 push_arg("-F");
364 if (opt->linenum)
365 push_arg("-n");
366 if (!opt->pathname)
367 push_arg("-h");
368 if (opt->regflags & REG_EXTENDED)
369 push_arg("-E");
370 if (opt->ignore_case)
371 push_arg("-i");
372 if (opt->binary == GREP_BINARY_NOMATCH)
373 push_arg("-I");
374 if (opt->word_regexp)
375 push_arg("-w");
376 if (opt->name_only)
377 push_arg("-l");
378 if (opt->unmatch_name_only)
379 push_arg("-L");
380 if (opt->null_following_name)
381 /* in GNU grep git's "-z" translates to "-Z" */
382 push_arg("-Z");
383 if (opt->count)
384 push_arg("-c");
385 if (opt->post_context || opt->pre_context) {
386 if (opt->post_context != opt->pre_context) {
387 if (opt->pre_context) {
388 push_arg("-B");
389 len += snprintf(argptr, sizeof(randarg)-len,
390 "%u", opt->pre_context) + 1;
391 if (sizeof(randarg) <= len)
392 die("maximum length of args exceeded");
393 push_arg(argptr);
394 argptr += len;
395 }
396 if (opt->post_context) {
397 push_arg("-A");
398 len += snprintf(argptr, sizeof(randarg)-len,
399 "%u", opt->post_context) + 1;
400 if (sizeof(randarg) <= len)
401 die("maximum length of args exceeded");
402 push_arg(argptr);
403 argptr += len;
404 }
405 }
406 else {
407 push_arg("-C");
408 len += snprintf(argptr, sizeof(randarg)-len,
409 "%u", opt->post_context) + 1;
410 if (sizeof(randarg) <= len)
411 die("maximum length of args exceeded");
412 push_arg(argptr);
413 argptr += len;
414 }
415 }
416 for (p = opt->pattern_list; p; p = p->next) {
417 push_arg("-e");
418 push_arg(p->pattern);
419 }
420 if (opt->color) {
421 struct strbuf sb = STRBUF_INIT;
422 grep_add_color(&sb, opt->color_match);
424 setenv("GREP_COLOR", sb.buf, 1);
425 strbuf_reset(&sb);
427 strbuf_addstr(&sb, "mt=");
428 grep_add_color(&sb, opt->color_match);
429 strbuf_addstr(&sb, ":sl=:cx=:fn=:ln=:bn=:se=");
430 setenv("GREP_COLORS", sb.buf, 1);
431 strbuf_release(&sb);
433 if (opt->color_external && strlen(opt->color_external) > 0)
435 push_arg(opt->color_external);
436 } else {
437 unsetenv("GREP_COLOR");
438 unsetenv("GREP_COLORS");
439 }
440 unsetenv("GREP_OPTIONS");
441 hit = 0;
443 argc = nr;
444 for (i = 0; i < active_nr; i++) {
445 struct cache_entry *ce = active_cache[i];
446 char *name;
447 int kept;
448 if (!S_ISREG(ce->ce_mode))
449 continue;
450 if (!pathspec_matches(paths, ce->name, opt->max_depth))
451 continue;
452 name = ce->name;
453 if (name[0] == '-') {
454 int len = ce_namelen(ce);
455 name = xmalloc(len + 3);
456 memcpy(name, "./", 2);
457 memcpy(name + 2, ce->name, len + 1);
458 }
459 argv[argc++] = name;
460 if (MAXARGS <= argc) {
461 status = flush_grep(opt, argc, nr, argv, &kept);
462 if (0 < status)
463 hit = 1;
464 argc = nr + kept;
465 }
466 if (ce_stage(ce)) {
467 do {
468 i++;
469 } while (i < active_nr &&
470 !strcmp(ce->name, active_cache[i]->name));
471 i--; /* compensate for loop control */
472 }
473 }
474 if (argc > nr) {
475 status = flush_grep(opt, argc, nr, argv, NULL);
476 if (0 < status)
477 hit = 1;
478 }
479 return hit;
480}
481#endif
482static int grep_cache(struct grep_opt *opt, const char **paths, int cached,
484 int external_grep_allowed)
485{
486 int hit = 0;
487 int nr;
488 read_cache();
489#if !NO_EXTERNAL_GREP
491 /*
492 * Use the external "grep" command for the case where
493 * we grep through the checked-out files. It tends to
494 * be a lot more optimized
495 */
496 if (!cached && external_grep_allowed) {
497 hit = external_grep(opt, paths, cached);
498 if (hit >= 0)
499 return hit;
500 hit = 0;
501 }
502#endif
503 for (nr = 0; nr < active_nr; nr++) {
505 struct cache_entry *ce = active_cache[nr];
506 if (!S_ISREG(ce->ce_mode))
507 continue;
508 if (!pathspec_matches(paths, ce->name, opt->max_depth))
509 continue;
510 /*
511 * If CE_VALID is on, we assume worktree file and its cache entry
512 * are identical, even if worktree file has been modified, so use
513 * cache version instead
514 */
515 if (cached || (ce->ce_flags & CE_VALID)) {
516 if (ce_stage(ce))
517 continue;
518 hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
519 }
520 else
521 hit |= grep_file(opt, ce->name);
522 if (ce_stage(ce)) {
523 do {
524 nr++;
525 } while (nr < active_nr &&
526 !strcmp(ce->name, active_cache[nr]->name));
527 nr--; /* compensate for loop control */
528 }
529 }
530 free_grep_patterns(opt);
531 return hit;
532}
533static int grep_tree(struct grep_opt *opt, const char **paths,
535 struct tree_desc *tree,
536 const char *tree_name, const char *base)
537{
538 int len;
539 int hit = 0;
540 struct name_entry entry;
541 char *down;
542 int tn_len = strlen(tree_name);
543 struct strbuf pathbuf;
544 strbuf_init(&pathbuf, PATH_MAX + tn_len);
546 if (tn_len) {
548 strbuf_add(&pathbuf, tree_name, tn_len);
549 strbuf_addch(&pathbuf, ':');
550 tn_len = pathbuf.len;
551 }
552 strbuf_addstr(&pathbuf, base);
553 len = pathbuf.len;
554 while (tree_entry(tree, &entry)) {
556 int te_len = tree_entry_len(entry.path, entry.sha1);
557 pathbuf.len = len;
558 strbuf_add(&pathbuf, entry.path, te_len);
559 if (S_ISDIR(entry.mode))
561 /* Match "abc/" against pathspec to
562 * decide if we want to descend into "abc"
563 * directory.
564 */
565 strbuf_addch(&pathbuf, '/');
566 down = pathbuf.buf + tn_len;
568 if (!pathspec_matches(paths, down, opt->max_depth))
569 ;
570 else if (S_ISREG(entry.mode))
571 hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
572 else if (S_ISDIR(entry.mode)) {
573 enum object_type type;
574 struct tree_desc sub;
575 void *data;
576 unsigned long size;
577 data = read_sha1_file(entry.sha1, &type, &size);
579 if (!data)
580 die("unable to read tree (%s)",
581 sha1_to_hex(entry.sha1));
582 init_tree_desc(&sub, data, size);
583 hit |= grep_tree(opt, paths, &sub, tree_name, down);
584 free(data);
585 }
586 }
587 strbuf_release(&pathbuf);
588 return hit;
589}
590static int grep_object(struct grep_opt *opt, const char **paths,
592 struct object *obj, const char *name)
593{
594 if (obj->type == OBJ_BLOB)
595 return grep_sha1(opt, obj->sha1, name, 0);
596 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
597 struct tree_desc tree;
598 void *data;
599 unsigned long size;
600 int hit;
601 data = read_object_with_reference(obj->sha1, tree_type,
602 &size, NULL);
603 if (!data)
604 die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
605 init_tree_desc(&tree, data, size);
606 hit = grep_tree(opt, paths, &tree, name, "");
607 free(data);
608 return hit;
609 }
610 die("unable to grep from object of type %s", typename(obj->type));
611}
612static int context_callback(const struct option *opt, const char *arg,
614 int unset)
615{
616 struct grep_opt *grep_opt = opt->value;
617 int value;
618 const char *endp;
619 if (unset) {
621 grep_opt->pre_context = grep_opt->post_context = 0;
622 return 0;
623 }
624 value = strtol(arg, (char **)&endp, 10);
625 if (*endp) {
626 return error("switch `%c' expects a numerical value",
627 opt->short_name);
628 }
629 grep_opt->pre_context = grep_opt->post_context = value;
630 return 0;
631}
632static int file_callback(const struct option *opt, const char *arg, int unset)
634{
635 struct grep_opt *grep_opt = opt->value;
636 FILE *patterns;
637 int lno = 0;
638 struct strbuf sb = STRBUF_INIT;
639 patterns = fopen(arg, "r");
641 if (!patterns)
642 die_errno("cannot open '%s'", arg);
643 while (strbuf_getline(&sb, patterns, '\n') == 0) {
644 /* ignore empty line like grep does */
645 if (sb.len == 0)
646 continue;
647 append_grep_pattern(grep_opt, strbuf_detach(&sb, NULL), arg,
648 ++lno, GREP_PATTERN);
649 }
650 fclose(patterns);
651 strbuf_release(&sb);
652 return 0;
653}
654static int not_callback(const struct option *opt, const char *arg, int unset)
656{
657 struct grep_opt *grep_opt = opt->value;
658 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
659 return 0;
660}
661static int and_callback(const struct option *opt, const char *arg, int unset)
663{
664 struct grep_opt *grep_opt = opt->value;
665 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
666 return 0;
667}
668static int open_callback(const struct option *opt, const char *arg, int unset)
670{
671 struct grep_opt *grep_opt = opt->value;
672 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
673 return 0;
674}
675static int close_callback(const struct option *opt, const char *arg, int unset)
677{
678 struct grep_opt *grep_opt = opt->value;
679 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
680 return 0;
681}
682static int pattern_callback(const struct option *opt, const char *arg,
684 int unset)
685{
686 struct grep_opt *grep_opt = opt->value;
687 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
688 return 0;
689}
690static int help_callback(const struct option *opt, const char *arg, int unset)
692{
693 return -1;
694}
695int cmd_grep(int argc, const char **argv, const char *prefix)
697{
698 int hit = 0;
699 int cached = 0;
700 int external_grep_allowed = 1;
701 int seen_dashdash = 0;
702 struct grep_opt opt;
703 struct object_array list = { 0, 0, NULL };
704 const char **paths = NULL;
705 int i;
706 int dummy;
707 struct option options[] = {
708 OPT_BOOLEAN(0, "cached", &cached,
709 "search in index instead of in the work tree"),
710 OPT_GROUP(""),
711 OPT_BOOLEAN('v', "invert-match", &opt.invert,
712 "show non-matching lines"),
713 OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
714 "case insensitive matching"),
715 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
716 "match patterns only at word boundaries"),
717 OPT_SET_INT('a', "text", &opt.binary,
718 "process binary files as text", GREP_BINARY_TEXT),
719 OPT_SET_INT('I', NULL, &opt.binary,
720 "don't match patterns in binary files",
721 GREP_BINARY_NOMATCH),
722 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
723 "descend at most <depth> levels", PARSE_OPT_NONEG,
724 NULL, 1 },
725 OPT_GROUP(""),
726 OPT_BIT('E', "extended-regexp", &opt.regflags,
727 "use extended POSIX regular expressions", REG_EXTENDED),
728 OPT_NEGBIT('G', "basic-regexp", &opt.regflags,
729 "use basic POSIX regular expressions (default)",
730 REG_EXTENDED),
731 OPT_BOOLEAN('F', "fixed-strings", &opt.fixed,
732 "interpret patterns as fixed strings"),
733 OPT_GROUP(""),
734 OPT_BOOLEAN('n', NULL, &opt.linenum, "show line numbers"),
735 OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
736 OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1),
737 OPT_NEGBIT(0, "full-name", &opt.relative,
738 "show filenames relative to top directory", 1),
739 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
740 "show only filenames instead of matching lines"),
741 OPT_BOOLEAN(0, "name-only", &opt.name_only,
742 "synonym for --files-with-matches"),
743 OPT_BOOLEAN('L', "files-without-match",
744 &opt.unmatch_name_only,
745 "show only the names of files without match"),
746 OPT_BOOLEAN('z', "null", &opt.null_following_name,
747 "print NUL after filenames"),
748 OPT_BOOLEAN('c', "count", &opt.count,
749 "show the number of matches instead of matching lines"),
750 OPT_SET_INT(0, "color", &opt.color, "highlight matches", 1),
751 OPT_GROUP(""),
752 OPT_CALLBACK('C', NULL, &opt, "n",
753 "show <n> context lines before and after matches",
754 context_callback),
755 OPT_INTEGER('B', NULL, &opt.pre_context,
756 "show <n> context lines before matches"),
757 OPT_INTEGER('A', NULL, &opt.post_context,
758 "show <n> context lines after matches"),
759 OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM",
760 context_callback),
761 OPT_BOOLEAN('p', "show-function", &opt.funcname,
762 "show a line with the function name before matches"),
763 OPT_GROUP(""),
764 OPT_CALLBACK('f', NULL, &opt, "file",
765 "read patterns from file", file_callback),
766 { OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
767 "match <pattern>", PARSE_OPT_NONEG, pattern_callback },
768 { OPTION_CALLBACK, 0, "and", &opt, NULL,
769 "combine patterns specified with -e",
770 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
771 OPT_BOOLEAN(0, "or", &dummy, ""),
772 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
773 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
774 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
775 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
776 open_callback },
777 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
778 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
779 close_callback },
780 OPT_BOOLEAN(0, "all-match", &opt.all_match,
781 "show only matches from files that match all patterns"),
782 OPT_GROUP(""),
783#if NO_EXTERNAL_GREP
784 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed,
785 "allow calling of grep(1) (ignored by this build)"),
786#else
787 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed,
788 "allow calling of grep(1) (default)"),
789#endif
790 { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage",
791 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
792 OPT_END()
793 };
794 /*
796 * 'git grep -h', unlike 'git grep -h <pattern>', is a request
797 * to show usage information and exit.
798 */
799 if (argc == 2 && !strcmp(argv[1], "-h"))
800 usage_with_options(grep_usage, options);
801 memset(&opt, 0, sizeof(opt));
803 opt.prefix = prefix;
804 opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
805 opt.relative = 1;
806 opt.pathname = 1;
807 opt.pattern_tail = &opt.pattern_list;
808 opt.regflags = REG_NEWLINE;
809 opt.max_depth = -1;
810 strcpy(opt.color_match, GIT_COLOR_RED GIT_COLOR_BOLD);
812 opt.color = -1;
813 git_config(grep_config, &opt);
814 if (opt.color == -1)
815 opt.color = git_use_color_default;
816 /*
818 * If there is no -- then the paths must exist in the working
819 * tree. If there is no explicit pattern specified with -e or
820 * -f, we take the first unrecognized non option to be the
821 * pattern, but then what follows it must be zero or more
822 * valid refs up to the -- (if exists), and then existing
823 * paths. If there is an explicit pattern, then the first
824 * unrecognized non option is the beginning of the refs list
825 * that continues up to the -- (if exists), and then paths.
826 */
827 argc = parse_options(argc, argv, prefix, options, grep_usage,
828 PARSE_OPT_KEEP_DASHDASH |
829 PARSE_OPT_STOP_AT_NON_OPTION |
830 PARSE_OPT_NO_INTERNAL_HELP);
831 /* First unrecognized non-option token */
833 if (argc > 0 && !opt.pattern_list) {
834 append_grep_pattern(&opt, argv[0], "command line", 0,
835 GREP_PATTERN);
836 argv++;
837 argc--;
838 }
839 if ((opt.color && !opt.color_external) || opt.funcname)
841 external_grep_allowed = 0;
842 if (!opt.pattern_list)
843 die("no pattern given.");
844 if (!opt.fixed && opt.ignore_case)
845 opt.regflags |= REG_ICASE;
846 if ((opt.regflags != REG_NEWLINE) && opt.fixed)
847 die("cannot mix --fixed-strings and regexp");
848 compile_grep_patterns(&opt);
849 /* Check revs and then paths */
851 for (i = 0; i < argc; i++) {
852 const char *arg = argv[i];
853 unsigned char sha1[20];
854 /* Is it a rev? */
855 if (!get_sha1(arg, sha1)) {
856 struct object *object = parse_object(sha1);
857 if (!object)
858 die("bad object %s", arg);
859 add_object_array(object, arg, &list);
860 continue;
861 }
862 if (!strcmp(arg, "--")) {
863 i++;
864 seen_dashdash = 1;
865 }
866 break;
867 }
868 /* The rest are paths */
870 if (!seen_dashdash) {
871 int j;
872 for (j = i; j < argc; j++)
873 verify_filename(prefix, argv[j]);
874 }
875 if (i < argc)
877 paths = get_pathspec(prefix, argv + i);
878 else if (prefix) {
879 paths = xcalloc(2, sizeof(const char *));
880 paths[0] = prefix;
881 paths[1] = NULL;
882 }
883 if (!list.nr) {
885 if (!cached)
886 setup_work_tree();
887 return !grep_cache(&opt, paths, cached, external_grep_allowed);
888 }
889 if (cached)
891 die("both --cached and trees are given.");
892 for (i = 0; i < list.nr; i++) {
894 struct object *real_obj;
895 real_obj = deref_tag(list.objects[i].item, NULL, 0);
896 if (grep_object(&opt, paths, real_obj, list.objects[i].name))
897 hit = 1;
898 }
899 free_grep_patterns(&opt);
900 return !hit;
901}