use parse_object_or_die instead of die("bad object")
[git/git.git] / builtin / grep.c
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 "string-list.h"
15 #include "run-command.h"
16 #include "userdiff.h"
17 #include "grep.h"
18 #include "quote.h"
19 #include "dir.h"
20
21 static char const * const grep_usage[] = {
22 "git grep [options] [-e] <pattern> [<rev>...] [[--] <path>...]",
23 NULL
24 };
25
26 static int use_threads = 1;
27
28 #ifndef NO_PTHREADS
29 #define THREADS 8
30 static pthread_t threads[THREADS];
31
32 /* We use one producer thread and THREADS consumer
33 * threads. The producer adds struct work_items to 'todo' and the
34 * consumers pick work items from the same array.
35 */
36 struct work_item {
37 struct grep_source source;
38 char done;
39 struct strbuf out;
40 };
41
42 /* In the range [todo_done, todo_start) in 'todo' we have work_items
43 * that have been or are processed by a consumer thread. We haven't
44 * written the result for these to stdout yet.
45 *
46 * The work_items in [todo_start, todo_end) are waiting to be picked
47 * up by a consumer thread.
48 *
49 * The ranges are modulo TODO_SIZE.
50 */
51 #define TODO_SIZE 128
52 static struct work_item todo[TODO_SIZE];
53 static int todo_start;
54 static int todo_end;
55 static int todo_done;
56
57 /* Has all work items been added? */
58 static int all_work_added;
59
60 /* This lock protects all the variables above. */
61 static pthread_mutex_t grep_mutex;
62
63 static inline void grep_lock(void)
64 {
65 if (use_threads)
66 pthread_mutex_lock(&grep_mutex);
67 }
68
69 static inline void grep_unlock(void)
70 {
71 if (use_threads)
72 pthread_mutex_unlock(&grep_mutex);
73 }
74
75 /* Signalled when a new work_item is added to todo. */
76 static pthread_cond_t cond_add;
77
78 /* Signalled when the result from one work_item is written to
79 * stdout.
80 */
81 static pthread_cond_t cond_write;
82
83 /* Signalled when we are finished with everything. */
84 static pthread_cond_t cond_result;
85
86 static int skip_first_line;
87
88 static void add_work(struct grep_opt *opt, enum grep_source_type type,
89 const char *name, const void *id)
90 {
91 grep_lock();
92
93 while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
94 pthread_cond_wait(&cond_write, &grep_mutex);
95 }
96
97 grep_source_init(&todo[todo_end].source, type, name, id);
98 if (opt->binary != GREP_BINARY_TEXT)
99 grep_source_load_driver(&todo[todo_end].source);
100 todo[todo_end].done = 0;
101 strbuf_reset(&todo[todo_end].out);
102 todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
103
104 pthread_cond_signal(&cond_add);
105 grep_unlock();
106 }
107
108 static struct work_item *get_work(void)
109 {
110 struct work_item *ret;
111
112 grep_lock();
113 while (todo_start == todo_end && !all_work_added) {
114 pthread_cond_wait(&cond_add, &grep_mutex);
115 }
116
117 if (todo_start == todo_end && all_work_added) {
118 ret = NULL;
119 } else {
120 ret = &todo[todo_start];
121 todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
122 }
123 grep_unlock();
124 return ret;
125 }
126
127 static void work_done(struct work_item *w)
128 {
129 int old_done;
130
131 grep_lock();
132 w->done = 1;
133 old_done = todo_done;
134 for(; todo[todo_done].done && todo_done != todo_start;
135 todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
136 w = &todo[todo_done];
137 if (w->out.len) {
138 const char *p = w->out.buf;
139 size_t len = w->out.len;
140
141 /* Skip the leading hunk mark of the first file. */
142 if (skip_first_line) {
143 while (len) {
144 len--;
145 if (*p++ == '\n')
146 break;
147 }
148 skip_first_line = 0;
149 }
150
151 write_or_die(1, p, len);
152 }
153 grep_source_clear(&w->source);
154 }
155
156 if (old_done != todo_done)
157 pthread_cond_signal(&cond_write);
158
159 if (all_work_added && todo_done == todo_end)
160 pthread_cond_signal(&cond_result);
161
162 grep_unlock();
163 }
164
165 static void *run(void *arg)
166 {
167 int hit = 0;
168 struct grep_opt *opt = arg;
169
170 while (1) {
171 struct work_item *w = get_work();
172 if (!w)
173 break;
174
175 opt->output_priv = w;
176 hit |= grep_source(opt, &w->source);
177 grep_source_clear_data(&w->source);
178 work_done(w);
179 }
180 free_grep_patterns(arg);
181 free(arg);
182
183 return (void*) (intptr_t) hit;
184 }
185
186 static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
187 {
188 struct work_item *w = opt->output_priv;
189 strbuf_add(&w->out, buf, size);
190 }
191
192 static void start_threads(struct grep_opt *opt)
193 {
194 int i;
195
196 pthread_mutex_init(&grep_mutex, NULL);
197 pthread_mutex_init(&grep_read_mutex, NULL);
198 pthread_mutex_init(&grep_attr_mutex, NULL);
199 pthread_cond_init(&cond_add, NULL);
200 pthread_cond_init(&cond_write, NULL);
201 pthread_cond_init(&cond_result, NULL);
202 grep_use_locks = 1;
203
204 for (i = 0; i < ARRAY_SIZE(todo); i++) {
205 strbuf_init(&todo[i].out, 0);
206 }
207
208 for (i = 0; i < ARRAY_SIZE(threads); i++) {
209 int err;
210 struct grep_opt *o = grep_opt_dup(opt);
211 o->output = strbuf_out;
212 o->debug = 0;
213 compile_grep_patterns(o);
214 err = pthread_create(&threads[i], NULL, run, o);
215
216 if (err)
217 die(_("grep: failed to create thread: %s"),
218 strerror(err));
219 }
220 }
221
222 static int wait_all(void)
223 {
224 int hit = 0;
225 int i;
226
227 grep_lock();
228 all_work_added = 1;
229
230 /* Wait until all work is done. */
231 while (todo_done != todo_end)
232 pthread_cond_wait(&cond_result, &grep_mutex);
233
234 /* Wake up all the consumer threads so they can see that there
235 * is no more work to do.
236 */
237 pthread_cond_broadcast(&cond_add);
238 grep_unlock();
239
240 for (i = 0; i < ARRAY_SIZE(threads); i++) {
241 void *h;
242 pthread_join(threads[i], &h);
243 hit |= (int) (intptr_t) h;
244 }
245
246 pthread_mutex_destroy(&grep_mutex);
247 pthread_mutex_destroy(&grep_read_mutex);
248 pthread_mutex_destroy(&grep_attr_mutex);
249 pthread_cond_destroy(&cond_add);
250 pthread_cond_destroy(&cond_write);
251 pthread_cond_destroy(&cond_result);
252 grep_use_locks = 0;
253
254 return hit;
255 }
256 #else /* !NO_PTHREADS */
257
258 static int wait_all(void)
259 {
260 return 0;
261 }
262 #endif
263
264 static int grep_config(const char *var, const char *value, void *cb)
265 {
266 struct grep_opt *opt = cb;
267 char *color = NULL;
268
269 if (userdiff_config(var, value) < 0)
270 return -1;
271
272 if (!strcmp(var, "grep.extendedregexp")) {
273 if (git_config_bool(var, value))
274 opt->regflags |= REG_EXTENDED;
275 else
276 opt->regflags &= ~REG_EXTENDED;
277 return 0;
278 }
279
280 if (!strcmp(var, "grep.linenumber")) {
281 opt->linenum = git_config_bool(var, value);
282 return 0;
283 }
284
285 if (!strcmp(var, "color.grep"))
286 opt->color = git_config_colorbool(var, value);
287 else if (!strcmp(var, "color.grep.context"))
288 color = opt->color_context;
289 else if (!strcmp(var, "color.grep.filename"))
290 color = opt->color_filename;
291 else if (!strcmp(var, "color.grep.function"))
292 color = opt->color_function;
293 else if (!strcmp(var, "color.grep.linenumber"))
294 color = opt->color_lineno;
295 else if (!strcmp(var, "color.grep.match"))
296 color = opt->color_match;
297 else if (!strcmp(var, "color.grep.selected"))
298 color = opt->color_selected;
299 else if (!strcmp(var, "color.grep.separator"))
300 color = opt->color_sep;
301 else
302 return git_color_default_config(var, value, cb);
303 if (color) {
304 if (!value)
305 return config_error_nonbool(var);
306 color_parse(value, var, color);
307 }
308 return 0;
309 }
310
311 static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
312 {
313 void *data;
314
315 grep_read_lock();
316 data = read_sha1_file(sha1, type, size);
317 grep_read_unlock();
318 return data;
319 }
320
321 static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
322 const char *filename, int tree_name_len)
323 {
324 struct strbuf pathbuf = STRBUF_INIT;
325
326 if (opt->relative && opt->prefix_length) {
327 quote_path_relative(filename + tree_name_len, -1, &pathbuf,
328 opt->prefix);
329 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
330 } else {
331 strbuf_addstr(&pathbuf, filename);
332 }
333
334 #ifndef NO_PTHREADS
335 if (use_threads) {
336 add_work(opt, GREP_SOURCE_SHA1, pathbuf.buf, sha1);
337 strbuf_release(&pathbuf);
338 return 0;
339 } else
340 #endif
341 {
342 struct grep_source gs;
343 int hit;
344
345 grep_source_init(&gs, GREP_SOURCE_SHA1, pathbuf.buf, sha1);
346 strbuf_release(&pathbuf);
347 hit = grep_source(opt, &gs);
348
349 grep_source_clear(&gs);
350 return hit;
351 }
352 }
353
354 static int grep_file(struct grep_opt *opt, const char *filename)
355 {
356 struct strbuf buf = STRBUF_INIT;
357
358 if (opt->relative && opt->prefix_length)
359 quote_path_relative(filename, -1, &buf, opt->prefix);
360 else
361 strbuf_addstr(&buf, filename);
362
363 #ifndef NO_PTHREADS
364 if (use_threads) {
365 add_work(opt, GREP_SOURCE_FILE, buf.buf, filename);
366 strbuf_release(&buf);
367 return 0;
368 } else
369 #endif
370 {
371 struct grep_source gs;
372 int hit;
373
374 grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename);
375 strbuf_release(&buf);
376 hit = grep_source(opt, &gs);
377
378 grep_source_clear(&gs);
379 return hit;
380 }
381 }
382
383 static void append_path(struct grep_opt *opt, const void *data, size_t len)
384 {
385 struct string_list *path_list = opt->output_priv;
386
387 if (len == 1 && *(const char *)data == '\0')
388 return;
389 string_list_append(path_list, xstrndup(data, len));
390 }
391
392 static void run_pager(struct grep_opt *opt, const char *prefix)
393 {
394 struct string_list *path_list = opt->output_priv;
395 const char **argv = xmalloc(sizeof(const char *) * (path_list->nr + 1));
396 int i, status;
397
398 for (i = 0; i < path_list->nr; i++)
399 argv[i] = path_list->items[i].string;
400 argv[path_list->nr] = NULL;
401
402 if (prefix && chdir(prefix))
403 die(_("Failed to chdir: %s"), prefix);
404 status = run_command_v_opt(argv, RUN_USING_SHELL);
405 if (status)
406 exit(status);
407 free(argv);
408 }
409
410 static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached)
411 {
412 int hit = 0;
413 int nr;
414 read_cache();
415
416 for (nr = 0; nr < active_nr; nr++) {
417 struct cache_entry *ce = active_cache[nr];
418 if (!S_ISREG(ce->ce_mode))
419 continue;
420 if (!match_pathspec_depth(pathspec, ce->name, ce_namelen(ce), 0, NULL))
421 continue;
422 /*
423 * If CE_VALID is on, we assume worktree file and its cache entry
424 * are identical, even if worktree file has been modified, so use
425 * cache version instead
426 */
427 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
428 if (ce_stage(ce))
429 continue;
430 hit |= grep_sha1(opt, ce->sha1, ce->name, 0);
431 }
432 else
433 hit |= grep_file(opt, ce->name);
434 if (ce_stage(ce)) {
435 do {
436 nr++;
437 } while (nr < active_nr &&
438 !strcmp(ce->name, active_cache[nr]->name));
439 nr--; /* compensate for loop control */
440 }
441 if (hit && opt->status_only)
442 break;
443 }
444 return hit;
445 }
446
447 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
448 struct tree_desc *tree, struct strbuf *base, int tn_len)
449 {
450 int hit = 0;
451 enum interesting match = entry_not_interesting;
452 struct name_entry entry;
453 int old_baselen = base->len;
454
455 while (tree_entry(tree, &entry)) {
456 int te_len = tree_entry_len(&entry);
457
458 if (match != all_entries_interesting) {
459 match = tree_entry_interesting(&entry, base, tn_len, pathspec);
460 if (match == all_entries_not_interesting)
461 break;
462 if (match == entry_not_interesting)
463 continue;
464 }
465
466 strbuf_add(base, entry.path, te_len);
467
468 if (S_ISREG(entry.mode)) {
469 hit |= grep_sha1(opt, entry.sha1, base->buf, tn_len);
470 }
471 else if (S_ISDIR(entry.mode)) {
472 enum object_type type;
473 struct tree_desc sub;
474 void *data;
475 unsigned long size;
476
477 data = lock_and_read_sha1_file(entry.sha1, &type, &size);
478 if (!data)
479 die(_("unable to read tree (%s)"),
480 sha1_to_hex(entry.sha1));
481
482 strbuf_addch(base, '/');
483 init_tree_desc(&sub, data, size);
484 hit |= grep_tree(opt, pathspec, &sub, base, tn_len);
485 free(data);
486 }
487 strbuf_setlen(base, old_baselen);
488
489 if (hit && opt->status_only)
490 break;
491 }
492 return hit;
493 }
494
495 static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
496 struct object *obj, const char *name)
497 {
498 if (obj->type == OBJ_BLOB)
499 return grep_sha1(opt, obj->sha1, name, 0);
500 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
501 struct tree_desc tree;
502 void *data;
503 unsigned long size;
504 struct strbuf base;
505 int hit, len;
506
507 grep_read_lock();
508 data = read_object_with_reference(obj->sha1, tree_type,
509 &size, NULL);
510 grep_read_unlock();
511
512 if (!data)
513 die(_("unable to read tree (%s)"), sha1_to_hex(obj->sha1));
514
515 len = name ? strlen(name) : 0;
516 strbuf_init(&base, PATH_MAX + len + 1);
517 if (len) {
518 strbuf_add(&base, name, len);
519 strbuf_addch(&base, ':');
520 }
521 init_tree_desc(&tree, data, size);
522 hit = grep_tree(opt, pathspec, &tree, &base, base.len);
523 strbuf_release(&base);
524 free(data);
525 return hit;
526 }
527 die(_("unable to grep from object of type %s"), typename(obj->type));
528 }
529
530 static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
531 const struct object_array *list)
532 {
533 unsigned int i;
534 int hit = 0;
535 const unsigned int nr = list->nr;
536
537 for (i = 0; i < nr; i++) {
538 struct object *real_obj;
539 real_obj = deref_tag(list->objects[i].item, NULL, 0);
540 if (grep_object(opt, pathspec, real_obj, list->objects[i].name)) {
541 hit = 1;
542 if (opt->status_only)
543 break;
544 }
545 }
546 return hit;
547 }
548
549 static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
550 int exc_std)
551 {
552 struct dir_struct dir;
553 int i, hit = 0;
554
555 memset(&dir, 0, sizeof(dir));
556 if (exc_std)
557 setup_standard_excludes(&dir);
558
559 fill_directory(&dir, pathspec->raw);
560 for (i = 0; i < dir.nr; i++) {
561 const char *name = dir.entries[i]->name;
562 int namelen = strlen(name);
563 if (!match_pathspec_depth(pathspec, name, namelen, 0, NULL))
564 continue;
565 hit |= grep_file(opt, dir.entries[i]->name);
566 if (hit && opt->status_only)
567 break;
568 }
569 return hit;
570 }
571
572 static int context_callback(const struct option *opt, const char *arg,
573 int unset)
574 {
575 struct grep_opt *grep_opt = opt->value;
576 int value;
577 const char *endp;
578
579 if (unset) {
580 grep_opt->pre_context = grep_opt->post_context = 0;
581 return 0;
582 }
583 value = strtol(arg, (char **)&endp, 10);
584 if (*endp) {
585 return error(_("switch `%c' expects a numerical value"),
586 opt->short_name);
587 }
588 grep_opt->pre_context = grep_opt->post_context = value;
589 return 0;
590 }
591
592 static int file_callback(const struct option *opt, const char *arg, int unset)
593 {
594 struct grep_opt *grep_opt = opt->value;
595 int from_stdin = !strcmp(arg, "-");
596 FILE *patterns;
597 int lno = 0;
598 struct strbuf sb = STRBUF_INIT;
599
600 patterns = from_stdin ? stdin : fopen(arg, "r");
601 if (!patterns)
602 die_errno(_("cannot open '%s'"), arg);
603 while (strbuf_getline(&sb, patterns, '\n') == 0) {
604 /* ignore empty line like grep does */
605 if (sb.len == 0)
606 continue;
607
608 append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
609 GREP_PATTERN);
610 }
611 if (!from_stdin)
612 fclose(patterns);
613 strbuf_release(&sb);
614 return 0;
615 }
616
617 static int not_callback(const struct option *opt, const char *arg, int unset)
618 {
619 struct grep_opt *grep_opt = opt->value;
620 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
621 return 0;
622 }
623
624 static int and_callback(const struct option *opt, const char *arg, int unset)
625 {
626 struct grep_opt *grep_opt = opt->value;
627 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
628 return 0;
629 }
630
631 static int open_callback(const struct option *opt, const char *arg, int unset)
632 {
633 struct grep_opt *grep_opt = opt->value;
634 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
635 return 0;
636 }
637
638 static int close_callback(const struct option *opt, const char *arg, int unset)
639 {
640 struct grep_opt *grep_opt = opt->value;
641 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
642 return 0;
643 }
644
645 static int pattern_callback(const struct option *opt, const char *arg,
646 int unset)
647 {
648 struct grep_opt *grep_opt = opt->value;
649 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
650 return 0;
651 }
652
653 static int help_callback(const struct option *opt, const char *arg, int unset)
654 {
655 return -1;
656 }
657
658 int cmd_grep(int argc, const char **argv, const char *prefix)
659 {
660 int hit = 0;
661 int cached = 0, untracked = 0, opt_exclude = -1;
662 int seen_dashdash = 0;
663 int external_grep_allowed__ignored;
664 const char *show_in_pager = NULL, *default_pager = "dummy";
665 struct grep_opt opt;
666 struct object_array list = OBJECT_ARRAY_INIT;
667 const char **paths = NULL;
668 struct pathspec pathspec;
669 struct string_list path_list = STRING_LIST_INIT_NODUP;
670 int i;
671 int dummy;
672 int use_index = 1;
673 enum {
674 pattern_type_unspecified = 0,
675 pattern_type_bre,
676 pattern_type_ere,
677 pattern_type_fixed,
678 pattern_type_pcre,
679 };
680 int pattern_type = pattern_type_unspecified;
681
682 struct option options[] = {
683 OPT_BOOLEAN(0, "cached", &cached,
684 "search in index instead of in the work tree"),
685 OPT_NEGBIT(0, "no-index", &use_index,
686 "finds in contents not managed by git", 1),
687 OPT_BOOLEAN(0, "untracked", &untracked,
688 "search in both tracked and untracked files"),
689 OPT_SET_INT(0, "exclude-standard", &opt_exclude,
690 "search also in ignored files", 1),
691 OPT_GROUP(""),
692 OPT_BOOLEAN('v', "invert-match", &opt.invert,
693 "show non-matching lines"),
694 OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
695 "case insensitive matching"),
696 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
697 "match patterns only at word boundaries"),
698 OPT_SET_INT('a', "text", &opt.binary,
699 "process binary files as text", GREP_BINARY_TEXT),
700 OPT_SET_INT('I', NULL, &opt.binary,
701 "don't match patterns in binary files",
702 GREP_BINARY_NOMATCH),
703 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, "depth",
704 "descend at most <depth> levels", PARSE_OPT_NONEG,
705 NULL, 1 },
706 OPT_GROUP(""),
707 OPT_SET_INT('E', "extended-regexp", &pattern_type,
708 "use extended POSIX regular expressions",
709 pattern_type_ere),
710 OPT_SET_INT('G', "basic-regexp", &pattern_type,
711 "use basic POSIX regular expressions (default)",
712 pattern_type_bre),
713 OPT_SET_INT('F', "fixed-strings", &pattern_type,
714 "interpret patterns as fixed strings",
715 pattern_type_fixed),
716 OPT_SET_INT('P', "perl-regexp", &pattern_type,
717 "use Perl-compatible regular expressions",
718 pattern_type_pcre),
719 OPT_GROUP(""),
720 OPT_BOOLEAN('n', "line-number", &opt.linenum, "show line numbers"),
721 OPT_NEGBIT('h', NULL, &opt.pathname, "don't show filenames", 1),
722 OPT_BIT('H', NULL, &opt.pathname, "show filenames", 1),
723 OPT_NEGBIT(0, "full-name", &opt.relative,
724 "show filenames relative to top directory", 1),
725 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
726 "show only filenames instead of matching lines"),
727 OPT_BOOLEAN(0, "name-only", &opt.name_only,
728 "synonym for --files-with-matches"),
729 OPT_BOOLEAN('L', "files-without-match",
730 &opt.unmatch_name_only,
731 "show only the names of files without match"),
732 OPT_BOOLEAN('z', "null", &opt.null_following_name,
733 "print NUL after filenames"),
734 OPT_BOOLEAN('c', "count", &opt.count,
735 "show the number of matches instead of matching lines"),
736 OPT__COLOR(&opt.color, "highlight matches"),
737 OPT_BOOLEAN(0, "break", &opt.file_break,
738 "print empty line between matches from different files"),
739 OPT_BOOLEAN(0, "heading", &opt.heading,
740 "show filename only once above matches from same file"),
741 OPT_GROUP(""),
742 OPT_CALLBACK('C', "context", &opt, "n",
743 "show <n> context lines before and after matches",
744 context_callback),
745 OPT_INTEGER('B', "before-context", &opt.pre_context,
746 "show <n> context lines before matches"),
747 OPT_INTEGER('A', "after-context", &opt.post_context,
748 "show <n> context lines after matches"),
749 OPT_NUMBER_CALLBACK(&opt, "shortcut for -C NUM",
750 context_callback),
751 OPT_BOOLEAN('p', "show-function", &opt.funcname,
752 "show a line with the function name before matches"),
753 OPT_BOOLEAN('W', "function-context", &opt.funcbody,
754 "show the surrounding function"),
755 OPT_GROUP(""),
756 OPT_CALLBACK('f', NULL, &opt, "file",
757 "read patterns from file", file_callback),
758 { OPTION_CALLBACK, 'e', NULL, &opt, "pattern",
759 "match <pattern>", PARSE_OPT_NONEG, pattern_callback },
760 { OPTION_CALLBACK, 0, "and", &opt, NULL,
761 "combine patterns specified with -e",
762 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
763 OPT_BOOLEAN(0, "or", &dummy, ""),
764 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
765 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
766 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
767 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
768 open_callback },
769 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
770 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
771 close_callback },
772 OPT__QUIET(&opt.status_only,
773 "indicate hit with exit status without output"),
774 OPT_BOOLEAN(0, "all-match", &opt.all_match,
775 "show only matches from files that match all patterns"),
776 { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
777 "show parse tree for grep expression",
778 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
779 OPT_GROUP(""),
780 { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
781 "pager", "show matching files in the pager",
782 PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager },
783 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed__ignored,
784 "allow calling of grep(1) (ignored by this build)"),
785 { OPTION_CALLBACK, 0, "help-all", &options, NULL, "show usage",
786 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
787 OPT_END()
788 };
789
790 /*
791 * 'git grep -h', unlike 'git grep -h <pattern>', is a request
792 * to show usage information and exit.
793 */
794 if (argc == 2 && !strcmp(argv[1], "-h"))
795 usage_with_options(grep_usage, options);
796
797 memset(&opt, 0, sizeof(opt));
798 opt.prefix = prefix;
799 opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
800 opt.relative = 1;
801 opt.pathname = 1;
802 opt.pattern_tail = &opt.pattern_list;
803 opt.header_tail = &opt.header_list;
804 opt.regflags = REG_NEWLINE;
805 opt.max_depth = -1;
806
807 strcpy(opt.color_context, "");
808 strcpy(opt.color_filename, "");
809 strcpy(opt.color_function, "");
810 strcpy(opt.color_lineno, "");
811 strcpy(opt.color_match, GIT_COLOR_BOLD_RED);
812 strcpy(opt.color_selected, "");
813 strcpy(opt.color_sep, GIT_COLOR_CYAN);
814 opt.color = -1;
815 git_config(grep_config, &opt);
816
817 /*
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 switch (pattern_type) {
832 case pattern_type_fixed:
833 opt.fixed = 1;
834 opt.pcre = 0;
835 break;
836 case pattern_type_bre:
837 opt.fixed = 0;
838 opt.pcre = 0;
839 opt.regflags &= ~REG_EXTENDED;
840 break;
841 case pattern_type_ere:
842 opt.fixed = 0;
843 opt.pcre = 0;
844 opt.regflags |= REG_EXTENDED;
845 break;
846 case pattern_type_pcre:
847 opt.fixed = 0;
848 opt.pcre = 1;
849 break;
850 default:
851 break; /* nothing */
852 }
853
854 if (use_index && !startup_info->have_repository)
855 /* die the same way as if we did it at the beginning */
856 setup_git_directory();
857
858 /*
859 * skip a -- separator; we know it cannot be
860 * separating revisions from pathnames if
861 * we haven't even had any patterns yet
862 */
863 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
864 argv++;
865 argc--;
866 }
867
868 /* First unrecognized non-option token */
869 if (argc > 0 && !opt.pattern_list) {
870 append_grep_pattern(&opt, argv[0], "command line", 0,
871 GREP_PATTERN);
872 argv++;
873 argc--;
874 }
875
876 if (show_in_pager == default_pager)
877 show_in_pager = git_pager(1);
878 if (show_in_pager) {
879 opt.color = 0;
880 opt.name_only = 1;
881 opt.null_following_name = 1;
882 opt.output_priv = &path_list;
883 opt.output = append_path;
884 string_list_append(&path_list, show_in_pager);
885 use_threads = 0;
886 }
887
888 if (!opt.pattern_list)
889 die(_("no pattern given."));
890 if (!opt.fixed && opt.ignore_case)
891 opt.regflags |= REG_ICASE;
892
893 compile_grep_patterns(&opt);
894
895 /* Check revs and then paths */
896 for (i = 0; i < argc; i++) {
897 const char *arg = argv[i];
898 unsigned char sha1[20];
899 /* Is it a rev? */
900 if (!get_sha1(arg, sha1)) {
901 struct object *object = parse_object_or_die(sha1, arg);
902 add_object_array(object, arg, &list);
903 continue;
904 }
905 if (!strcmp(arg, "--")) {
906 i++;
907 seen_dashdash = 1;
908 }
909 break;
910 }
911
912 #ifndef NO_PTHREADS
913 if (list.nr || cached || online_cpus() == 1)
914 use_threads = 0;
915 #else
916 use_threads = 0;
917 #endif
918
919 #ifndef NO_PTHREADS
920 if (use_threads) {
921 if (!(opt.name_only || opt.unmatch_name_only || opt.count)
922 && (opt.pre_context || opt.post_context ||
923 opt.file_break || opt.funcbody))
924 skip_first_line = 1;
925 start_threads(&opt);
926 }
927 #endif
928
929 /* The rest are paths */
930 if (!seen_dashdash) {
931 int j;
932 for (j = i; j < argc; j++)
933 verify_filename(prefix, argv[j], j == i);
934 }
935
936 paths = get_pathspec(prefix, argv + i);
937 init_pathspec(&pathspec, paths);
938 pathspec.max_depth = opt.max_depth;
939 pathspec.recursive = 1;
940
941 if (show_in_pager && (cached || list.nr))
942 die(_("--open-files-in-pager only works on the worktree"));
943
944 if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
945 const char *pager = path_list.items[0].string;
946 int len = strlen(pager);
947
948 if (len > 4 && is_dir_sep(pager[len - 5]))
949 pager += len - 4;
950
951 if (!strcmp("less", pager) || !strcmp("vi", pager)) {
952 struct strbuf buf = STRBUF_INIT;
953 strbuf_addf(&buf, "+/%s%s",
954 strcmp("less", pager) ? "" : "*",
955 opt.pattern_list->pattern);
956 string_list_append(&path_list, buf.buf);
957 strbuf_detach(&buf, NULL);
958 }
959 }
960
961 if (!show_in_pager)
962 setup_pager();
963
964 if (!use_index && (untracked || cached))
965 die(_("--cached or --untracked cannot be used with --no-index."));
966
967 if (!use_index || untracked) {
968 int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
969 if (list.nr)
970 die(_("--no-index or --untracked cannot be used with revs."));
971 hit = grep_directory(&opt, &pathspec, use_exclude);
972 } else if (0 <= opt_exclude) {
973 die(_("--[no-]exclude-standard cannot be used for tracked contents."));
974 } else if (!list.nr) {
975 if (!cached)
976 setup_work_tree();
977
978 hit = grep_cache(&opt, &pathspec, cached);
979 } else {
980 if (cached)
981 die(_("both --cached and trees are given."));
982 hit = grep_objects(&opt, &pathspec, &list);
983 }
984
985 if (use_threads)
986 hit |= wait_all();
987 if (hit && show_in_pager)
988 run_pager(&opt, prefix);
989 free_grep_patterns(&opt);
990 return !hit;
991 }