25ee75d989d80382e370b5460f3d8f64ae086f6e
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#ifndef NO_EXTERNAL_GREP
18#ifdef __unix__
19#define NO_EXTERNAL_GREP 0
20#else
21#define NO_EXTERNAL_GREP 1
22#endif
23#endif
24static char const * const grep_usage[] = {
26 "git grep [options] [-e] <pattern> [<rev>...] [[--] path...]",
27 NULL
28};
29static int grep_config(const char *var, const char *value, void *cb)
31{
32 struct grep_opt *opt = cb;
33 switch (userdiff_config(var, value)) {
35 case 0: break;
36 case -1: return -1;
37 default: return 0;
38 }
39 if (!strcmp(var, "color.grep")) {
41 opt->color = git_config_colorbool(var, value, -1);
42 return 0;
43 }
44 if (!strcmp(var, "color.grep.external"))
45 return git_config_string(&(opt->color_external), var, value);
46 if (!strcmp(var, "color.grep.match")) {
47 if (!value)
48 return config_error_nonbool(var);
49 color_parse(value, var, opt->color_match);
50 return 0;
51 }
52 return git_color_default_config(var, value, cb);
53}
54/*
56 * Return non-zero if max_depth is negative or path has no more then max_depth
57 * slashes.
58 */
59static int accept_subdir(const char *path, int max_depth)
60{
61 if (max_depth < 0)
62 return 1;
63 while ((path = strchr(path, '/')) != NULL) {
65 max_depth--;
66 if (max_depth < 0)
67 return 0;
68 path++;
69 }
70 return 1;
71}
72/*
74 * Return non-zero if name is a subdirectory of match and is not too deep.
75 */
76static int is_subdir(const char *name, int namelen,
77 const char *match, int matchlen, int max_depth)
78{
79 if (matchlen > namelen || strncmp(name, match, matchlen))
80 return 0;
81 if (name[matchlen] == '\0') /* exact match */
83 return 1;
84 if (!matchlen || match[matchlen-1] == '/' || name[matchlen] == '/')
86 return accept_subdir(name + matchlen + 1, max_depth);
87 return 0;
89}
90/*
92 * git grep pathspecs are somewhat different from diff-tree pathspecs;
93 * pathname wildcards are allowed.
94 */
95static int pathspec_matches(const char **paths, const char *name, int max_depth)
96{
97 int namelen, i;
98 if (!paths || !*paths)
99 return accept_subdir(name, max_depth);
100 namelen = strlen(name);
101 for (i = 0; paths[i]; i++) {
102 const char *match = paths[i];
103 int matchlen = strlen(match);
104 const char *cp, *meta;
105 if (is_subdir(name, namelen, match, matchlen, max_depth))
107 return 1;
108 if (!fnmatch(match, name, 0))
109 return 1;
110 if (name[namelen-1] != '/')
111 continue;
112 /* We are being asked if the directory ("name") is worth
114 * descending into.
115 *
116 * Find the longest leading directory name that does
117 * not have metacharacter in the pathspec; the name
118 * we are looking at must overlap with that directory.
119 */
120 for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
121 char ch = *cp;
122 if (ch == '*' || ch == '[' || ch == '?') {
123 meta = cp;
124 break;
125 }
126 }
127 if (!meta)
128 meta = cp; /* fully literal */
129 if (namelen <= meta - match) {
131 /* Looking at "Documentation/" and
132 * the pattern says "Documentation/howto/", or
133 * "Documentation/diff*.txt". The name we
134 * have should match prefix.
135 */
136 if (!memcmp(match, name, namelen))
137 return 1;
138 continue;
139 }
140 if (meta - match < namelen) {
142 /* Looking at "Documentation/howto/" and
143 * the pattern says "Documentation/h*";
144 * match up to "Do.../h"; this avoids descending
145 * into "Documentation/technical/".
146 */
147 if (!memcmp(match, name, meta - match))
148 return 1;
149 continue;
150 }
151 }
152 return 0;
153}
154static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char *name, int tree_name_len)
156{
157 unsigned long size;
158 char *data;
159 enum object_type type;
160 char *to_free = NULL;
161 int hit;
162 data = read_sha1_file(sha1, &type, &size);
164 if (!data) {
165 error("'%s': unable to read %s", name, sha1_to_hex(sha1));
166 return 0;
167 }
168 if (opt->relative && opt->prefix_length) {
169 static char name_buf[PATH_MAX];
170 char *cp;
171 int name_len = strlen(name) - opt->prefix_length + 1;
172 if (!tree_name_len)
174 name += opt->prefix_length;
175 else {
176 if (ARRAY_SIZE(name_buf) <= name_len)
177 cp = to_free = xmalloc(name_len);
178 else
179 cp = name_buf;
180 memcpy(cp, name, tree_name_len);
181 strcpy(cp + tree_name_len,
182 name + tree_name_len + opt->prefix_length);
183 name = cp;
184 }
185 }
186 hit = grep_buffer(opt, name, data, size);
187 free(data);
188 free(to_free);
189 return hit;
190}
191static int grep_file(struct grep_opt *opt, const char *filename)
193{
194 struct stat st;
195 int i;
196 char *data;
197 size_t sz;
198 if (lstat(filename, &st) < 0) {
200 err_ret:
201 if (errno != ENOENT)
202 error("'%s': %s", filename, strerror(errno));
203 return 0;
204 }
205 if (!st.st_size)
206 return 0; /* empty file -- no grep hit */
207 if (!S_ISREG(st.st_mode))
208 return 0;
209 sz = xsize_t(st.st_size);
210 i = open(filename, O_RDONLY);
211 if (i < 0)
212 goto err_ret;
213 data = xmalloc(sz + 1);
214 if (st.st_size != read_in_full(i, data, sz)) {
215 error("'%s': short read %s", filename, strerror(errno));
216 close(i);
217 free(data);
218 return 0;
219 }
220 close(i);
221 if (opt->relative && opt->prefix_length)
222 filename += opt->prefix_length;
223 i = grep_buffer(opt, filename, data, sz);
224 free(data);
225 return i;
226}
227#if !NO_EXTERNAL_GREP
229static int exec_grep(int argc, const char **argv)
230{
231 pid_t pid;
232 int status;
233 argv[argc] = NULL;
235 pid = fork();
236 if (pid < 0)
237 return pid;
238 if (!pid) {
239 execvp("grep", (char **) argv);
240 exit(255);
241 }
242 while (waitpid(pid, &status, 0) < 0) {
243 if (errno == EINTR)
244 continue;
245 return -1;
246 }
247 if (WIFEXITED(status)) {
248 if (!WEXITSTATUS(status))
249 return 1;
250 return 0;
251 }
252 return -1;
253}
254#define MAXARGS 1000
256#define ARGBUF 4096
257#define push_arg(a) do { \
258 if (nr < MAXARGS) argv[nr++] = (a); \
259 else die("maximum number of args exceeded"); \
260 } while (0)
261/*
263 * If you send a singleton filename to grep, it does not give
264 * the name of the file. GNU grep has "-H" but we would want
265 * that behaviour in a portable way.
266 *
267 * So we keep two pathnames in argv buffer unsent to grep in
268 * the main loop if we need to do more than one grep.
269 */
270static int flush_grep(struct grep_opt *opt,
271 int argc, int arg0, const char **argv, int *kept)
272{
273 int status;
274 int count = argc - arg0;
275 const char *kept_0 = NULL;
276 if (count <= 2) {
278 /*
279 * Because we keep at least 2 paths in the call from
280 * the main loop (i.e. kept != NULL), and MAXARGS is
281 * far greater than 2, this usually is a call to
282 * conclude the grep. However, the user could attempt
283 * to overflow the argv buffer by giving too many
284 * options to leave very small number of real
285 * arguments even for the call in the main loop.
286 */
287 if (kept)
288 die("insanely many options to grep");
289 /*
291 * If we have two or more paths, we do not have to do
292 * anything special, but we need to push /dev/null to
293 * get "-H" behaviour of GNU grep portably but when we
294 * are not doing "-l" nor "-L" nor "-c".
295 */
296 if (count == 1 &&
297 !opt->name_only &&
298 !opt->unmatch_name_only &&
299 !opt->count) {
300 argv[argc++] = "/dev/null";
301 argv[argc] = NULL;
302 }
303 }
304 else if (kept) {
306 /*
307 * Called because we found many paths and haven't finished
308 * iterating over the cache yet. We keep two paths
309 * for the concluding call. argv[argc-2] and argv[argc-1]
310 * has the last two paths, so save the first one away,
311 * replace it with NULL while sending the list to grep,
312 * and recover them after we are done.
313 */
314 *kept = 2;
315 kept_0 = argv[argc-2];
316 argv[argc-2] = NULL;
317 argc -= 2;
318 }
319 if (opt->pre_context || opt->post_context) {
321 /*
322 * grep handles hunk marks between files, but we need to
323 * do that ourselves between multiple calls.
324 */
325 if (opt->show_hunk_mark)
326 write_or_die(1, "--\n", 3);
327 else
328 opt->show_hunk_mark = 1;
329 }
330 status = exec_grep(argc, argv);
332 if (kept_0) {
334 /*
335 * Then recover them. Now the last arg is beyond the
336 * terminating NULL which is at argc, and the second
337 * from the last is what we saved away in kept_0
338 */
339 argv[arg0++] = kept_0;
340 argv[arg0] = argv[argc+1];
341 }
342 return status;
343}
344static void grep_add_color(struct strbuf *sb, const char *escape_seq)
346{
347 size_t orig_len = sb->len;
348 while (*escape_seq) {
350 if (*escape_seq == 'm')
351 strbuf_addch(sb, ';');
352 else if (*escape_seq != '\033' && *escape_seq != '[')
353 strbuf_addch(sb, *escape_seq);
354 escape_seq++;
355 }
356 if (sb->len > orig_len && sb->buf[sb->len - 1] == ';')
357 strbuf_setlen(sb, sb->len - 1);
358}
359static int has_skip_worktree_entry(struct grep_opt *opt, const char **paths)
361{
362 int nr;
363 for (nr = 0; nr < active_nr; nr++) {
364 struct cache_entry *ce = active_cache[nr];
365 if (!S_ISREG(ce->ce_mode))
366 continue;
367 if (!pathspec_matches(paths, ce->name, opt->max_depth))
368 continue;
369 if (ce_skip_worktree(ce))
370 return 1;
371 }
372 return 0;
373}
374static int external_grep(struct grep_opt *opt, const char **paths, int cached)
376{
377 int i, nr, argc, hit, len, status;
378 const char *argv[MAXARGS+1];
379 char randarg[ARGBUF];
380 char *argptr = randarg;
381 struct grep_pat *p;
382 if (opt->extended || (opt->relative && opt->prefix_length)
384 || has_skip_worktree_entry(opt, paths))
385 return -1;
386 len = nr = 0;
387 push_arg("grep");
388 if (opt->fixed)
389 push_arg("-F");
390 if (opt->linenum)
391 push_arg("-n");
392 if (!opt->pathname)
393 push_arg("-h");
394 if (opt->regflags & REG_EXTENDED)
395 push_arg("-E");
396 if (opt->regflags & REG_ICASE)
397 push_arg("-i");
398 if (opt->binary == GREP_BINARY_NOMATCH)
399 push_arg("-I");
400 if (opt->word_regexp)
401 push_arg("-w");
402 if (opt->name_only)
403 push_arg("-l");
404 if (opt->unmatch_name_only)
405 push_arg("-L");
406 if (opt->null_following_name)
407 /* in GNU grep git's "-z" translates to "-Z" */
408 push_arg("-Z");
409 if (opt->count)
410 push_arg("-c");
411 if (opt->post_context || opt->pre_context) {
412 if (opt->post_context != opt->pre_context) {
413 if (opt->pre_context) {
414 push_arg("-B");
415 len += snprintf(argptr, sizeof(randarg)-len,
416 "%u", opt->pre_context) + 1;
417 if (sizeof(randarg) <= len)
418 die("maximum length of args exceeded");
419 push_arg(argptr);
420 argptr += len;
421 }
422 if (opt->post_context) {
423 push_arg("-A");
424 len += snprintf(argptr, sizeof(randarg)-len,
425 "%u", opt->post_context) + 1;
426 if (sizeof(randarg) <= len)
427 die("maximum length of args exceeded");
428 push_arg(argptr);
429 argptr += len;
430 }
431 }
432 else {
433 push_arg("-C");
434 len += snprintf(argptr, sizeof(randarg)-len,
435 "%u", opt->post_context) + 1;
436 if (sizeof(randarg) <= len)
437 die("maximum length of args exceeded");
438 push_arg(argptr);
439 argptr += len;
440 }
441 }
442 for (p = opt->pattern_list; p; p = p->next) {
443 push_arg("-e");
444 push_arg(p->pattern);
445 }
446 if (opt->color) {
447 struct strbuf sb = STRBUF_INIT;
448 grep_add_color(&sb, opt->color_match);
450 setenv("GREP_COLOR", sb.buf, 1);
451 strbuf_reset(&sb);
453 strbuf_addstr(&sb, "mt=");
454 grep_add_color(&sb, opt->color_match);
455 strbuf_addstr(&sb, ":sl=:cx=:fn=:ln=:bn=:se=");
456 setenv("GREP_COLORS", sb.buf, 1);
457 strbuf_release(&sb);
459 if (opt->color_external && strlen(opt->color_external) > 0)
461 push_arg(opt->color_external);
462 }
463 hit = 0;
465 argc = nr;
466 for (i = 0; i < active_nr; i++) {
467 struct cache_entry *ce = active_cache[i];
468 char *name;
469 int kept;
470 if (!S_ISREG(ce->ce_mode))
471 continue;
472 if (!pathspec_matches(paths, ce->name, opt->max_depth))
473 continue;
474 name = ce->name;
475 if (name[0] == '-') {
476 int len = ce_namelen(ce);
477 name = xmalloc(len + 3);
478 memcpy(name, "./", 2);
479 memcpy(name + 2, ce->name, len + 1);
480 }
481 argv[argc++] = name;
482 if (MAXARGS <= argc) {
483 status = flush_grep(opt, argc, nr, argv, &kept);
484 if (0 < status)
485 hit = 1;
486 argc = nr + kept;
487 }
488 if (ce_stage(ce)) {
489 do {
490 i++;
491 } while (i < active_nr &&
492 !strcmp(ce->name, active_cache[i]->name));
493 i--; /* compensate for loop control */
494 }
495 }
496 if (argc > nr) {
497 status = flush_grep(opt, argc, nr, argv, NULL);
498 if (0 < status)
499 hit = 1;
500 }
501 return hit;
502}
503#endif
504static int grep_cache(struct grep_opt *opt, const char **paths, int cached,
506 int external_grep_allowed)
507{
508 int hit = 0;
509 int nr;
510 read_cache();
511#if !NO_EXTERNAL_GREP
513 /*
514 * Use the external "grep" command for the case where
515 * we grep through the checked-out files. It tends to
516 * be a lot more optimized
517 */
518 if (!cached && external_grep_allowed) {
519 hit = external_grep(opt, paths, cached);
520 if (hit >= 0)
521 return hit;
522 }
523#endif
524 for (nr = 0; nr < active_nr; nr++) {
526 struct cache_entry *ce = active_cache[nr];
527 if (!S_ISREG(ce->ce_mode))
528 continue;
529 if (!pathspec_matches(paths, ce->name, opt->max_depth))
530 continue;
531 /*
532 * If CE_VALID is on, we assume worktree file and its cache entry
533 * are identical, even if worktree file has been modified, so use
534 * cache version instead
535 */
536 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
537 if (ce_stage(ce))
538 continue;
539 hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
540 }
541 else
542 hit |= grep_file(opt, ce->name);
543 if (ce_stage(ce)) {
544 do {
545 nr++;
546 } while (nr < active_nr &&
547 !strcmp(ce->name, active_cache[nr]->name));
548 nr--; /* compensate for loop control */
549 }
550 }
551 free_grep_patterns(opt);
552 return hit;
553}
554static int grep_tree(struct grep_opt *opt, const char **paths,
556 struct tree_desc *tree,
557 const char *tree_name, const char *base)
558{
559 int len;
560 int hit = 0;
561 struct name_entry entry;
562 char *down;
563 int tn_len = strlen(tree_name);
564 struct strbuf pathbuf;
565 strbuf_init(&pathbuf, PATH_MAX + tn_len);
567 if (tn_len) {
569 strbuf_add(&pathbuf, tree_name, tn_len);
570 strbuf_addch(&pathbuf, ':');
571 tn_len = pathbuf.len;
572 }
573 strbuf_addstr(&pathbuf, base);
574 len = pathbuf.len;
575 while (tree_entry(tree, &entry)) {
577 int te_len = tree_entry_len(entry.path, entry.sha1);
578 pathbuf.len = len;
579 strbuf_add(&pathbuf, entry.path, te_len);
580 if (S_ISDIR(entry.mode))
582 /* Match "abc/" against pathspec to
583 * decide if we want to descend into "abc"
584 * directory.
585 */
586 strbuf_addch(&pathbuf, '/');
587 down = pathbuf.buf + tn_len;
589 if (!pathspec_matches(paths, down, opt->max_depth))
590 ;
591 else if (S_ISREG(entry.mode))
592 hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
593 else if (S_ISDIR(entry.mode)) {
594 enum object_type type;
595 struct tree_desc sub;
596 void *data;
597 unsigned long size;
598 data = read_sha1_file(entry.sha1, &type, &size);
600 if (!data)
601 die("unable to read tree (%s)",
602 sha1_to_hex(entry.sha1));
603 init_tree_desc(&sub, data, size);
604 hit |= grep_tree(opt, paths, &sub, tree_name, down);
605 free(data);
606 }
607 }
608 strbuf_release(&pathbuf);
609 return hit;
610}
611static int grep_object(struct grep_opt *opt, const char **paths,
613 struct object *obj, const char *name)
614{
615 if (obj->type == OBJ_BLOB)
616 return grep_sha1(opt, obj->sha1, name, 0);
617 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
618 struct tree_desc tree;
619 void *data;
620 unsigned long size;
621 int hit;
622 data = read_object_with_reference(obj->sha1, tree_type,
623 &size, NULL);
624 if (!data)
625 die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
626 init_tree_desc(&tree, data, size);
627 hit = grep_tree(opt, paths, &tree, name, "");
628 free(data);
629 return hit;
630 }
631 die("unable to grep from object of type %s", typename(obj->type));
632}
633static int context_callback(const struct option *opt, const char *arg,
635 int unset)
636{
637 struct grep_opt *grep_opt = opt->value;
638 int value;
639 const char *endp;
640 if (unset) {
642 grep_opt->pre_context = grep_opt->post_context = 0;
643 return 0;
644 }
645 value = strtol(arg, (char **)&endp, 10);
646 if (*endp) {
647 return error("switch `%c' expects a numerical value",
648 opt->short_name);
649 }
650 grep_opt->pre_context = grep_opt->post_context = value;
651 return 0;
652}
653static int file_callback(const struct option *opt, const char *arg, int unset)
655{
656 struct grep_opt *grep_opt = opt->value;
657 FILE *patterns;
658 int lno = 0;
659 struct strbuf sb;
660 patterns = fopen(arg, "r");
662 if (!patterns)
663 die_errno("cannot open '%s'", arg);
664 while (strbuf_getline(&sb, patterns, '\n') == 0) {
665 /* ignore empty line like grep does */
666 if (sb.len == 0)
667 continue;
668 append_grep_pattern(grep_opt, strbuf_detach(&sb, NULL), arg,
669 ++lno, GREP_PATTERN);
670 }
671 fclose(patterns);
672 strbuf_release(&sb);
673 return 0;
674}
675static int not_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, "--not", "command line", 0, GREP_NOT);
680 return 0;
681}
682static int and_callback(const struct option *opt, const char *arg, int unset)
684{
685 struct grep_opt *grep_opt = opt->value;
686 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
687 return 0;
688}
689static int open_callback(const struct option *opt, const char *arg, int unset)
691{
692 struct grep_opt *grep_opt = opt->value;
693 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
694 return 0;
695}
696static int close_callback(const struct option *opt, const char *arg, int unset)
698{
699 struct grep_opt *grep_opt = opt->value;
700 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
701 return 0;
702}
703static int pattern_callback(const struct option *opt, const char *arg,
705 int unset)
706{
707 struct grep_opt *grep_opt = opt->value;
708 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
709 return 0;
710}
711static int help_callback(const struct option *opt, const char *arg, int unset)
713{
714 return -1;
715}
716int cmd_grep(int argc, const char **argv, const char *prefix)
718{
719 int hit = 0;
720 int cached = 0;
721 int external_grep_allowed = 1;
722 int seen_dashdash = 0;
723 struct grep_opt opt;
724 struct object_array list = { 0, 0, NULL };
725 const char **paths = NULL;
726 int i;
727 int dummy;
728 struct option options[] = {
729 OPT_BOOLEAN(0, "cached", &cached,
730 "search in index instead of in the work tree"),
731 OPT_GROUP(""),
732 OPT_BOOLEAN('v', "invert-match", &opt.invert,
733 "show non-matching lines"),
734 OPT_BIT('i', "ignore-case", &opt.regflags,
735 "case insensitive matching", REG_ICASE),
736 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
737 "match patterns only at word boundaries"),
738 OPT_SET_INT('a', "text", &opt.binary,
739 "process binary files as text", GREP_BINARY_TEXT),
740 OPT_SET_INT('I', NULL, &opt.binary,
741 "don't match patterns in binary files",
742 GREP_BINARY_NOMATCH),
743 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
744 "descend at most <depth> levels", PARSE_OPT_NONEG,
745 NULL, 1 },
746 OPT_GROUP(""),
747 OPT_BIT('E', "extended-regexp", &opt.regflags,
748 "use extended POSIX regular expressions", REG_EXTENDED),
749 OPT_NEGBIT('G', "basic-regexp", &opt.regflags,
750 "use basic POSIX regular expressions (default)",
751 REG_EXTENDED),
752 OPT_BOOLEAN('F', "fixed-strings", &opt.fixed,
753 "interpret patterns as fixed strings"),
754 OPT_GROUP(""),
755 OPT_BOOLEAN('n', NULL, &opt.linenum, "show line numbers"),
756 OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
757 OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1),
758 OPT_NEGBIT(0, "full-name", &opt.relative,
759 "show filenames relative to top directory", 1),
760 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
761 "show only filenames instead of matching lines"),
762 OPT_BOOLEAN(0, "name-only", &opt.name_only,
763 "synonym for --files-with-matches"),
764 OPT_BOOLEAN('L', "files-without-match",
765 &opt.unmatch_name_only,
766 "show only the names of files without match"),
767 OPT_BOOLEAN('z', "null", &opt.null_following_name,
768 "print NUL after filenames"),
769 OPT_BOOLEAN('c', "count", &opt.count,
770 "show the number of matches instead of matching lines"),
771 OPT_SET_INT(0, "color", &opt.color, "highlight matches", 1),
772 OPT_GROUP(""),
773 OPT_CALLBACK('C', NULL, &opt, "n",
774 "show <n> context lines before and after matches",
775 context_callback),
776 OPT_INTEGER('B', NULL, &opt.pre_context,
777 "show <n> context lines before matches"),
778 OPT_INTEGER('A', NULL, &opt.post_context,
779 "show <n> context lines after matches"),
780 OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM",
781 context_callback),
782 OPT_BOOLEAN('p', "show-function", &opt.funcname,
783 "show a line with the function name before matches"),
784 OPT_GROUP(""),
785 OPT_CALLBACK('f', NULL, &opt, "file",
786 "read patterns from file", file_callback),
787 { OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
788 "match <pattern>", PARSE_OPT_NONEG, pattern_callback },
789 { OPTION_CALLBACK, 0, "and", &opt, NULL,
790 "combine patterns specified with -e",
791 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
792 OPT_BOOLEAN(0, "or", &dummy, ""),
793 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
794 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
795 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
796 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
797 open_callback },
798 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
799 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
800 close_callback },
801 OPT_BOOLEAN(0, "all-match", &opt.all_match,
802 "show only matches from files that match all patterns"),
803 OPT_GROUP(""),
804#if NO_EXTERNAL_GREP
805 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed,
806 "allow calling of grep(1) (ignored by this build)"),
807#else
808 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed,
809 "allow calling of grep(1) (default)"),
810#endif
811 { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage",
812 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
813 OPT_END()
814 };
815 memset(&opt, 0, sizeof(opt));
817 opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
818 opt.relative = 1;
819 opt.pathname = 1;
820 opt.pattern_tail = &opt.pattern_list;
821 opt.regflags = REG_NEWLINE;
822 opt.max_depth = -1;
823 strcpy(opt.color_match, GIT_COLOR_RED GIT_COLOR_BOLD);
825 opt.color = -1;
826 git_config(grep_config, &opt);
827 if (opt.color == -1)
828 opt.color = git_use_color_default;
829 /*
831 * If there is no -- then the paths must exist in the working
832 * tree. If there is no explicit pattern specified with -e or
833 * -f, we take the first unrecognized non option to be the
834 * pattern, but then what follows it must be zero or more
835 * valid refs up to the -- (if exists), and then existing
836 * paths. If there is an explicit pattern, then the first
837 * unrecognized non option is the beginning of the refs list
838 * that continues up to the -- (if exists), and then paths.
839 */
840 argc = parse_options(argc, argv, prefix, options, grep_usage,
841 PARSE_OPT_KEEP_DASHDASH |
842 PARSE_OPT_STOP_AT_NON_OPTION |
843 PARSE_OPT_NO_INTERNAL_HELP);
844 /* First unrecognized non-option token */
846 if (argc > 0 && !opt.pattern_list) {
847 append_grep_pattern(&opt, argv[0], "command line", 0,
848 GREP_PATTERN);
849 argv++;
850 argc--;
851 }
852 if ((opt.color && !opt.color_external) || opt.funcname)
854 external_grep_allowed = 0;
855 if (!opt.pattern_list)
856 die("no pattern given.");
857 if ((opt.regflags != REG_NEWLINE) && opt.fixed)
858 die("cannot mix --fixed-strings and regexp");
859 compile_grep_patterns(&opt);
860 /* Check revs and then paths */
862 for (i = 0; i < argc; i++) {
863 const char *arg = argv[i];
864 unsigned char sha1[20];
865 /* Is it a rev? */
866 if (!get_sha1(arg, sha1)) {
867 struct object *object = parse_object(sha1);
868 if (!object)
869 die("bad object %s", arg);
870 add_object_array(object, arg, &list);
871 continue;
872 }
873 if (!strcmp(arg, "--")) {
874 i++;
875 seen_dashdash = 1;
876 }
877 break;
878 }
879 /* The rest are paths */
881 if (!seen_dashdash) {
882 int j;
883 for (j = i; j < argc; j++)
884 verify_filename(prefix, argv[j]);
885 }
886 if (i < argc) {
888 paths = get_pathspec(prefix, argv + i);
889 if (opt.prefix_length && opt.relative) {
890 /* Make sure we do not get outside of paths */
891 for (i = 0; paths[i]; i++)
892 if (strncmp(prefix, paths[i], opt.prefix_length))
893 die("git grep: cannot generate relative filenames containing '..'");
894 }
895 }
896 else if (prefix) {
897 paths = xcalloc(2, sizeof(const char *));
898 paths[0] = prefix;
899 paths[1] = NULL;
900 }
901 if (!list.nr) {
903 if (!cached)
904 setup_work_tree();
905 return !grep_cache(&opt, paths, cached, external_grep_allowed);
906 }
907 if (cached)
909 die("both --cached and trees are given.");
910 for (i = 0; i < list.nr; i++) {
912 struct object *real_obj;
913 real_obj = deref_tag(list.objects[i].item, NULL, 0);
914 if (grep_object(&opt, paths, real_obj, list.objects[i].name))
915 hit = 1;
916 }
917 free_grep_patterns(&opt);
918 return !hit;
919}