4 * Copyright (c) 2006 Junio C Hamano
11 #include "tree-walk.h"
13 #include "parse-options.h"
19 static char const * const grep_usage[] = {
20 "git grep [options] [-e] <pattern> [<rev>...] [[--] path...]",
24 static int grep_config(const char *var, const char *value, void *cb)
26 struct grep_opt *opt = cb;
28 switch (userdiff_config(var, value)) {
34 if (!strcmp(var, "color.grep")) {
35 opt->color = git_config_colorbool(var, value, -1);
38 if (!strcmp(var, "color.grep.match")) {
40 return config_error_nonbool(var);
41 color_parse(value, var, opt->color_match);
44 return git_color_default_config(var, value, cb);
48 * Return non-zero if max_depth is negative or path has no more then max_depth
51 static int accept_subdir(const char *path, int max_depth)
56 while ((path = strchr(path, '/')) != NULL) {
66 * Return non-zero if name is a subdirectory of match and is not too deep.
68 static int is_subdir(const char *name, int namelen,
69 const char *match, int matchlen, int max_depth)
71 if (matchlen > namelen || strncmp(name, match, matchlen))
74 if (name[matchlen] == '\0') /* exact match */
77 if (!matchlen || match[matchlen-1] == '/' || name[matchlen] == '/')
78 return accept_subdir(name + matchlen + 1, max_depth);
84 * git grep pathspecs are somewhat different from diff-tree pathspecs;
85 * pathname wildcards are allowed.
87 static int pathspec_matches(const char **paths, const char *name, int max_depth)
90 if (!paths || !*paths)
91 return accept_subdir(name, max_depth);
92 namelen = strlen(name);
93 for (i = 0; paths[i]; i++) {
94 const char *match = paths[i];
95 int matchlen = strlen(match);
96 const char *cp, *meta;
98 if (is_subdir(name, namelen, match, matchlen, max_depth))
100 if (!fnmatch(match, name, 0))
102 if (name[namelen-1] != '/')
105 /* We are being asked if the directory ("name") is worth
108 * Find the longest leading directory name that does
109 * not have metacharacter in the pathspec; the name
110 * we are looking at must overlap with that directory.
112 for (cp = match, meta = NULL; cp - match < matchlen; cp++) {
114 if (ch == '*' || ch == '[' || ch == '?') {
120 meta = cp; /* fully literal */
122 if (namelen <= meta - match) {
123 /* Looking at "Documentation/" and
124 * the pattern says "Documentation/howto/", or
125 * "Documentation/diff*.txt". The name we
126 * have should match prefix.
128 if (!memcmp(match, name, namelen))
133 if (meta - match < namelen) {
134 /* Looking at "Documentation/howto/" and
135 * the pattern says "Documentation/h*";
136 * match up to "Do.../h"; this avoids descending
137 * into "Documentation/technical/".
139 if (!memcmp(match, name, meta - match))
147 static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char *name, int tree_name_len)
151 enum object_type type;
153 struct strbuf pathbuf = STRBUF_INIT;
155 data = read_sha1_file(sha1, &type, &size);
157 error("'%s': unable to read %s", name, sha1_to_hex(sha1));
160 if (opt->relative && opt->prefix_length) {
161 quote_path_relative(name + tree_name_len, -1, &pathbuf, opt->prefix);
162 strbuf_insert(&pathbuf, 0, name, tree_name_len);
165 hit = grep_buffer(opt, name, data, size);
166 strbuf_release(&pathbuf);
171 static int grep_file(struct grep_opt *opt, const char *filename)
177 struct strbuf buf = STRBUF_INIT;
179 if (lstat(filename, &st) < 0) {
182 error("'%s': %s", filename, strerror(errno));
186 return 0; /* empty file -- no grep hit */
187 if (!S_ISREG(st.st_mode))
189 sz = xsize_t(st.st_size);
190 i = open(filename, O_RDONLY);
193 data = xmalloc(sz + 1);
194 if (st.st_size != read_in_full(i, data, sz)) {
195 error("'%s': short read %s", filename, strerror(errno));
201 if (opt->relative && opt->prefix_length)
202 filename = quote_path_relative(filename, -1, &buf, opt->prefix);
203 i = grep_buffer(opt, filename, data, sz);
204 strbuf_release(&buf);
209 static int grep_cache(struct grep_opt *opt, const char **paths, int cached)
215 for (nr = 0; nr < active_nr; nr++) {
216 struct cache_entry *ce = active_cache[nr];
217 if (!S_ISREG(ce->ce_mode))
219 if (!pathspec_matches(paths, ce->name, opt->max_depth))
222 * If CE_VALID is on, we assume worktree file and its cache entry
223 * are identical, even if worktree file has been modified, so use
224 * cache version instead
226 if (cached || (ce->ce_flags & CE_VALID)) {
229 hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
232 hit |= grep_file(opt, ce->name);
236 } while (nr < active_nr &&
237 !strcmp(ce->name, active_cache[nr]->name));
238 nr--; /* compensate for loop control */
241 free_grep_patterns(opt);
245 static int grep_tree(struct grep_opt *opt, const char **paths,
246 struct tree_desc *tree,
247 const char *tree_name, const char *base)
251 struct name_entry entry;
253 int tn_len = strlen(tree_name);
254 struct strbuf pathbuf;
256 strbuf_init(&pathbuf, PATH_MAX + tn_len);
259 strbuf_add(&pathbuf, tree_name, tn_len);
260 strbuf_addch(&pathbuf, ':');
261 tn_len = pathbuf.len;
263 strbuf_addstr(&pathbuf, base);
266 while (tree_entry(tree, &entry)) {
267 int te_len = tree_entry_len(entry.path, entry.sha1);
269 strbuf_add(&pathbuf, entry.path, te_len);
271 if (S_ISDIR(entry.mode))
272 /* Match "abc/" against pathspec to
273 * decide if we want to descend into "abc"
276 strbuf_addch(&pathbuf, '/');
278 down = pathbuf.buf + tn_len;
279 if (!pathspec_matches(paths, down, opt->max_depth))
281 else if (S_ISREG(entry.mode))
282 hit |= grep_sha1(opt, entry.sha1, pathbuf.buf, tn_len);
283 else if (S_ISDIR(entry.mode)) {
284 enum object_type type;
285 struct tree_desc sub;
289 data = read_sha1_file(entry.sha1, &type, &size);
291 die("unable to read tree (%s)",
292 sha1_to_hex(entry.sha1));
293 init_tree_desc(&sub, data, size);
294 hit |= grep_tree(opt, paths, &sub, tree_name, down);
298 strbuf_release(&pathbuf);
302 static int grep_object(struct grep_opt *opt, const char **paths,
303 struct object *obj, const char *name)
305 if (obj->type == OBJ_BLOB)
306 return grep_sha1(opt, obj->sha1, name, 0);
307 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
308 struct tree_desc tree;
312 data = read_object_with_reference(obj->sha1, tree_type,
315 die("unable to read tree (%s)", sha1_to_hex(obj->sha1));
316 init_tree_desc(&tree, data, size);
317 hit = grep_tree(opt, paths, &tree, name, "");
321 die("unable to grep from object of type %s", typename(obj->type));
324 static int grep_directory(struct grep_opt *opt, const char **paths)
326 struct dir_struct dir;
329 memset(&dir, 0, sizeof(dir));
330 setup_standard_excludes(&dir);
332 fill_directory(&dir, paths);
333 for (i = 0; i < dir.nr; i++)
334 hit |= grep_file(opt, dir.entries[i]->name);
335 free_grep_patterns(opt);
339 static int context_callback(const struct option *opt, const char *arg,
342 struct grep_opt *grep_opt = opt->value;
347 grep_opt->pre_context = grep_opt->post_context = 0;
350 value = strtol(arg, (char **)&endp, 10);
352 return error("switch `%c' expects a numerical value",
355 grep_opt->pre_context = grep_opt->post_context = value;
359 static int file_callback(const struct option *opt, const char *arg, int unset)
361 struct grep_opt *grep_opt = opt->value;
364 struct strbuf sb = STRBUF_INIT;
366 patterns = fopen(arg, "r");
368 die_errno("cannot open '%s'", arg);
369 while (strbuf_getline(&sb, patterns, '\n') == 0) {
370 /* ignore empty line like grep does */
373 append_grep_pattern(grep_opt, strbuf_detach(&sb, NULL), arg,
374 ++lno, GREP_PATTERN);
381 static int not_callback(const struct option *opt, const char *arg, int unset)
383 struct grep_opt *grep_opt = opt->value;
384 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
388 static int and_callback(const struct option *opt, const char *arg, int unset)
390 struct grep_opt *grep_opt = opt->value;
391 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
395 static int open_callback(const struct option *opt, const char *arg, int unset)
397 struct grep_opt *grep_opt = opt->value;
398 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
402 static int close_callback(const struct option *opt, const char *arg, int unset)
404 struct grep_opt *grep_opt = opt->value;
405 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
409 static int pattern_callback(const struct option *opt, const char *arg,
412 struct grep_opt *grep_opt = opt->value;
413 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
417 static int help_callback(const struct option *opt, const char *arg, int unset)
422 int cmd_grep(int argc, const char **argv, const char *prefix)
426 int seen_dashdash = 0;
427 int external_grep_allowed__ignored;
429 struct object_array list = { 0, 0, NULL };
430 const char **paths = NULL;
433 int nongit = 0, use_index = 1;
434 struct option options[] = {
435 OPT_BOOLEAN(0, "cached", &cached,
436 "search in index instead of in the work tree"),
437 OPT_BOOLEAN(0, "index", &use_index,
438 "--no-index finds in contents not managed by git"),
440 OPT_BOOLEAN('v', "invert-match", &opt.invert,
441 "show non-matching lines"),
442 OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
443 "case insensitive matching"),
444 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
445 "match patterns only at word boundaries"),
446 OPT_SET_INT('a', "text", &opt.binary,
447 "process binary files as text", GREP_BINARY_TEXT),
448 OPT_SET_INT('I', NULL, &opt.binary,
449 "don't match patterns in binary files",
450 GREP_BINARY_NOMATCH),
451 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
452 "descend at most <depth> levels", PARSE_OPT_NONEG,
455 OPT_BIT('E', "extended-regexp", &opt.regflags,
456 "use extended POSIX regular expressions", REG_EXTENDED),
457 OPT_NEGBIT('G', "basic-regexp", &opt.regflags,
458 "use basic POSIX regular expressions (default)",
460 OPT_BOOLEAN('F', "fixed-strings", &opt.fixed,
461 "interpret patterns as fixed strings"),
463 OPT_BOOLEAN('n', NULL, &opt.linenum, "show line numbers"),
464 OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
465 OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1),
466 OPT_NEGBIT(0, "full-name", &opt.relative,
467 "show filenames relative to top directory", 1),
468 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
469 "show only filenames instead of matching lines"),
470 OPT_BOOLEAN(0, "name-only", &opt.name_only,
471 "synonym for --files-with-matches"),
472 OPT_BOOLEAN('L', "files-without-match",
473 &opt.unmatch_name_only,
474 "show only the names of files without match"),
475 OPT_BOOLEAN('z', "null", &opt.null_following_name,
476 "print NUL after filenames"),
477 OPT_BOOLEAN('c', "count", &opt.count,
478 "show the number of matches instead of matching lines"),
479 OPT_SET_INT(0, "color", &opt.color, "highlight matches", 1),
481 OPT_CALLBACK('C', NULL, &opt, "n",
482 "show <n> context lines before and after matches",
484 OPT_INTEGER('B', NULL, &opt.pre_context,
485 "show <n> context lines before matches"),
486 OPT_INTEGER('A', NULL, &opt.post_context,
487 "show <n> context lines after matches"),
488 OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM",
490 OPT_BOOLEAN('p', "show-function", &opt.funcname,
491 "show a line with the function name before matches"),
493 OPT_CALLBACK('f', NULL, &opt, "file",
494 "read patterns from file", file_callback),
495 { OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
496 "match <pattern>", PARSE_OPT_NONEG, pattern_callback },
497 { OPTION_CALLBACK, 0, "and", &opt, NULL,
498 "combine patterns specified with -e",
499 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
500 OPT_BOOLEAN(0, "or", &dummy, ""),
501 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
502 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
503 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
504 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
506 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
507 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
509 OPT_BOOLEAN(0, "all-match", &opt.all_match,
510 "show only matches from files that match all patterns"),
512 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed__ignored,
513 "allow calling of grep(1) (ignored by this build)"),
514 { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage",
515 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
519 prefix = setup_git_directory_gently(&nongit);
522 * 'git grep -h', unlike 'git grep -h <pattern>', is a request
523 * to show usage information and exit.
525 if (argc == 2 && !strcmp(argv[1], "-h"))
526 usage_with_options(grep_usage, options);
528 memset(&opt, 0, sizeof(opt));
530 opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
533 opt.pattern_tail = &opt.pattern_list;
534 opt.regflags = REG_NEWLINE;
537 strcpy(opt.color_match, GIT_COLOR_RED GIT_COLOR_BOLD);
539 git_config(grep_config, &opt);
541 opt.color = git_use_color_default;
544 * If there is no -- then the paths must exist in the working
545 * tree. If there is no explicit pattern specified with -e or
546 * -f, we take the first unrecognized non option to be the
547 * pattern, but then what follows it must be zero or more
548 * valid refs up to the -- (if exists), and then existing
549 * paths. If there is an explicit pattern, then the first
550 * unrecognized non option is the beginning of the refs list
551 * that continues up to the -- (if exists), and then paths.
553 argc = parse_options(argc, argv, prefix, options, grep_usage,
554 PARSE_OPT_KEEP_DASHDASH |
555 PARSE_OPT_STOP_AT_NON_OPTION |
556 PARSE_OPT_NO_INTERNAL_HELP);
558 if (use_index && nongit)
559 /* die the same way as if we did it at the beginning */
560 setup_git_directory();
562 /* First unrecognized non-option token */
563 if (argc > 0 && !opt.pattern_list) {
564 append_grep_pattern(&opt, argv[0], "command line", 0,
570 if (!opt.pattern_list)
571 die("no pattern given.");
572 if (!opt.fixed && opt.ignore_case)
573 opt.regflags |= REG_ICASE;
574 if ((opt.regflags != REG_NEWLINE) && opt.fixed)
575 die("cannot mix --fixed-strings and regexp");
576 compile_grep_patterns(&opt);
578 /* Check revs and then paths */
579 for (i = 0; i < argc; i++) {
580 const char *arg = argv[i];
581 unsigned char sha1[20];
583 if (!get_sha1(arg, sha1)) {
584 struct object *object = parse_object(sha1);
586 die("bad object %s", arg);
587 add_object_array(object, arg, &list);
590 if (!strcmp(arg, "--")) {
597 /* The rest are paths */
598 if (!seen_dashdash) {
600 for (j = i; j < argc; j++)
601 verify_filename(prefix, argv[j]);
605 paths = get_pathspec(prefix, argv + i);
607 paths = xcalloc(2, sizeof(const char *));
614 die("--cached cannot be used with --no-index.");
616 die("--no-index cannot be used with revs.");
617 return !grep_directory(&opt, paths);
623 return !grep_cache(&opt, paths, cached);
627 die("both --cached and trees are given.");
629 for (i = 0; i < list.nr; i++) {
630 struct object *real_obj;
631 real_obj = deref_tag(list.objects[i].item, NULL, 0);
632 if (grep_object(&opt, paths, real_obj, list.objects[i].name))
635 free_grep_patterns(&opt);