Merge branch 'jx/clean-interactive'
[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 N_("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 char *path, 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, path, 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_cmd_config(const char *var, const char *value, void *cb)
265 {
266 int st = grep_config(var, value, cb);
267 if (git_color_default_config(var, value, cb) < 0)
268 st = -1;
269 return st;
270 }
271
272 static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
273 {
274 void *data;
275
276 grep_read_lock();
277 data = read_sha1_file(sha1, type, size);
278 grep_read_unlock();
279 return data;
280 }
281
282 static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
283 const char *filename, int tree_name_len,
284 const char *path)
285 {
286 struct strbuf pathbuf = STRBUF_INIT;
287
288 if (opt->relative && opt->prefix_length) {
289 quote_path_relative(filename + tree_name_len, opt->prefix, &pathbuf);
290 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
291 } else {
292 strbuf_addstr(&pathbuf, filename);
293 }
294
295 #ifndef NO_PTHREADS
296 if (use_threads) {
297 add_work(opt, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
298 strbuf_release(&pathbuf);
299 return 0;
300 } else
301 #endif
302 {
303 struct grep_source gs;
304 int hit;
305
306 grep_source_init(&gs, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
307 strbuf_release(&pathbuf);
308 hit = grep_source(opt, &gs);
309
310 grep_source_clear(&gs);
311 return hit;
312 }
313 }
314
315 static int grep_file(struct grep_opt *opt, const char *filename)
316 {
317 struct strbuf buf = STRBUF_INIT;
318
319 if (opt->relative && opt->prefix_length)
320 quote_path_relative(filename, opt->prefix, &buf);
321 else
322 strbuf_addstr(&buf, filename);
323
324 #ifndef NO_PTHREADS
325 if (use_threads) {
326 add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename);
327 strbuf_release(&buf);
328 return 0;
329 } else
330 #endif
331 {
332 struct grep_source gs;
333 int hit;
334
335 grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename);
336 strbuf_release(&buf);
337 hit = grep_source(opt, &gs);
338
339 grep_source_clear(&gs);
340 return hit;
341 }
342 }
343
344 static void append_path(struct grep_opt *opt, const void *data, size_t len)
345 {
346 struct string_list *path_list = opt->output_priv;
347
348 if (len == 1 && *(const char *)data == '\0')
349 return;
350 string_list_append(path_list, xstrndup(data, len));
351 }
352
353 static void run_pager(struct grep_opt *opt, const char *prefix)
354 {
355 struct string_list *path_list = opt->output_priv;
356 const char **argv = xmalloc(sizeof(const char *) * (path_list->nr + 1));
357 int i, status;
358
359 for (i = 0; i < path_list->nr; i++)
360 argv[i] = path_list->items[i].string;
361 argv[path_list->nr] = NULL;
362
363 if (prefix && chdir(prefix))
364 die(_("Failed to chdir: %s"), prefix);
365 status = run_command_v_opt(argv, RUN_USING_SHELL);
366 if (status)
367 exit(status);
368 free(argv);
369 }
370
371 static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached)
372 {
373 int hit = 0;
374 int nr;
375 read_cache();
376
377 for (nr = 0; nr < active_nr; nr++) {
378 const struct cache_entry *ce = active_cache[nr];
379 if (!S_ISREG(ce->ce_mode))
380 continue;
381 if (!match_pathspec_depth(pathspec, ce->name, ce_namelen(ce), 0, NULL))
382 continue;
383 /*
384 * If CE_VALID is on, we assume worktree file and its cache entry
385 * are identical, even if worktree file has been modified, so use
386 * cache version instead
387 */
388 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
389 if (ce_stage(ce))
390 continue;
391 hit |= grep_sha1(opt, ce->sha1, ce->name, 0, ce->name);
392 }
393 else
394 hit |= grep_file(opt, ce->name);
395 if (ce_stage(ce)) {
396 do {
397 nr++;
398 } while (nr < active_nr &&
399 !strcmp(ce->name, active_cache[nr]->name));
400 nr--; /* compensate for loop control */
401 }
402 if (hit && opt->status_only)
403 break;
404 }
405 return hit;
406 }
407
408 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
409 struct tree_desc *tree, struct strbuf *base, int tn_len,
410 int check_attr)
411 {
412 int hit = 0;
413 enum interesting match = entry_not_interesting;
414 struct name_entry entry;
415 int old_baselen = base->len;
416
417 while (tree_entry(tree, &entry)) {
418 int te_len = tree_entry_len(&entry);
419
420 if (match != all_entries_interesting) {
421 match = tree_entry_interesting(&entry, base, tn_len, pathspec);
422 if (match == all_entries_not_interesting)
423 break;
424 if (match == entry_not_interesting)
425 continue;
426 }
427
428 strbuf_add(base, entry.path, te_len);
429
430 if (S_ISREG(entry.mode)) {
431 hit |= grep_sha1(opt, entry.sha1, base->buf, tn_len,
432 check_attr ? base->buf + tn_len : NULL);
433 }
434 else if (S_ISDIR(entry.mode)) {
435 enum object_type type;
436 struct tree_desc sub;
437 void *data;
438 unsigned long size;
439
440 data = lock_and_read_sha1_file(entry.sha1, &type, &size);
441 if (!data)
442 die(_("unable to read tree (%s)"),
443 sha1_to_hex(entry.sha1));
444
445 strbuf_addch(base, '/');
446 init_tree_desc(&sub, data, size);
447 hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
448 check_attr);
449 free(data);
450 }
451 strbuf_setlen(base, old_baselen);
452
453 if (hit && opt->status_only)
454 break;
455 }
456 return hit;
457 }
458
459 static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
460 struct object *obj, const char *name)
461 {
462 if (obj->type == OBJ_BLOB)
463 return grep_sha1(opt, obj->sha1, name, 0, NULL);
464 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
465 struct tree_desc tree;
466 void *data;
467 unsigned long size;
468 struct strbuf base;
469 int hit, len;
470
471 grep_read_lock();
472 data = read_object_with_reference(obj->sha1, tree_type,
473 &size, NULL);
474 grep_read_unlock();
475
476 if (!data)
477 die(_("unable to read tree (%s)"), sha1_to_hex(obj->sha1));
478
479 len = name ? strlen(name) : 0;
480 strbuf_init(&base, PATH_MAX + len + 1);
481 if (len) {
482 strbuf_add(&base, name, len);
483 strbuf_addch(&base, ':');
484 }
485 init_tree_desc(&tree, data, size);
486 hit = grep_tree(opt, pathspec, &tree, &base, base.len,
487 obj->type == OBJ_COMMIT);
488 strbuf_release(&base);
489 free(data);
490 return hit;
491 }
492 die(_("unable to grep from object of type %s"), typename(obj->type));
493 }
494
495 static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
496 const struct object_array *list)
497 {
498 unsigned int i;
499 int hit = 0;
500 const unsigned int nr = list->nr;
501
502 for (i = 0; i < nr; i++) {
503 struct object *real_obj;
504 real_obj = deref_tag(list->objects[i].item, NULL, 0);
505 if (grep_object(opt, pathspec, real_obj, list->objects[i].name)) {
506 hit = 1;
507 if (opt->status_only)
508 break;
509 }
510 }
511 return hit;
512 }
513
514 static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
515 int exc_std)
516 {
517 struct dir_struct dir;
518 int i, hit = 0;
519
520 memset(&dir, 0, sizeof(dir));
521 if (exc_std)
522 setup_standard_excludes(&dir);
523
524 fill_directory(&dir, pathspec->raw);
525 for (i = 0; i < dir.nr; i++) {
526 const char *name = dir.entries[i]->name;
527 int namelen = strlen(name);
528 if (!match_pathspec_depth(pathspec, name, namelen, 0, NULL))
529 continue;
530 hit |= grep_file(opt, dir.entries[i]->name);
531 if (hit && opt->status_only)
532 break;
533 }
534 return hit;
535 }
536
537 static int context_callback(const struct option *opt, const char *arg,
538 int unset)
539 {
540 struct grep_opt *grep_opt = opt->value;
541 int value;
542 const char *endp;
543
544 if (unset) {
545 grep_opt->pre_context = grep_opt->post_context = 0;
546 return 0;
547 }
548 value = strtol(arg, (char **)&endp, 10);
549 if (*endp) {
550 return error(_("switch `%c' expects a numerical value"),
551 opt->short_name);
552 }
553 grep_opt->pre_context = grep_opt->post_context = value;
554 return 0;
555 }
556
557 static int file_callback(const struct option *opt, const char *arg, int unset)
558 {
559 struct grep_opt *grep_opt = opt->value;
560 int from_stdin = !strcmp(arg, "-");
561 FILE *patterns;
562 int lno = 0;
563 struct strbuf sb = STRBUF_INIT;
564
565 patterns = from_stdin ? stdin : fopen(arg, "r");
566 if (!patterns)
567 die_errno(_("cannot open '%s'"), arg);
568 while (strbuf_getline(&sb, patterns, '\n') == 0) {
569 /* ignore empty line like grep does */
570 if (sb.len == 0)
571 continue;
572
573 append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
574 GREP_PATTERN);
575 }
576 if (!from_stdin)
577 fclose(patterns);
578 strbuf_release(&sb);
579 return 0;
580 }
581
582 static int not_callback(const struct option *opt, const char *arg, int unset)
583 {
584 struct grep_opt *grep_opt = opt->value;
585 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
586 return 0;
587 }
588
589 static int and_callback(const struct option *opt, const char *arg, int unset)
590 {
591 struct grep_opt *grep_opt = opt->value;
592 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
593 return 0;
594 }
595
596 static int open_callback(const struct option *opt, const char *arg, int unset)
597 {
598 struct grep_opt *grep_opt = opt->value;
599 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
600 return 0;
601 }
602
603 static int close_callback(const struct option *opt, const char *arg, int unset)
604 {
605 struct grep_opt *grep_opt = opt->value;
606 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
607 return 0;
608 }
609
610 static int pattern_callback(const struct option *opt, const char *arg,
611 int unset)
612 {
613 struct grep_opt *grep_opt = opt->value;
614 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
615 return 0;
616 }
617
618 static int help_callback(const struct option *opt, const char *arg, int unset)
619 {
620 return -1;
621 }
622
623 int cmd_grep(int argc, const char **argv, const char *prefix)
624 {
625 int hit = 0;
626 int cached = 0, untracked = 0, opt_exclude = -1;
627 int seen_dashdash = 0;
628 int external_grep_allowed__ignored;
629 const char *show_in_pager = NULL, *default_pager = "dummy";
630 struct grep_opt opt;
631 struct object_array list = OBJECT_ARRAY_INIT;
632 const char **paths = NULL;
633 struct pathspec pathspec;
634 struct string_list path_list = STRING_LIST_INIT_NODUP;
635 int i;
636 int dummy;
637 int use_index = 1;
638 int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
639
640 struct option options[] = {
641 OPT_BOOLEAN(0, "cached", &cached,
642 N_("search in index instead of in the work tree")),
643 OPT_NEGBIT(0, "no-index", &use_index,
644 N_("find in contents not managed by git"), 1),
645 OPT_BOOLEAN(0, "untracked", &untracked,
646 N_("search in both tracked and untracked files")),
647 OPT_SET_INT(0, "exclude-standard", &opt_exclude,
648 N_("search also in ignored files"), 1),
649 OPT_GROUP(""),
650 OPT_BOOLEAN('v', "invert-match", &opt.invert,
651 N_("show non-matching lines")),
652 OPT_BOOLEAN('i', "ignore-case", &opt.ignore_case,
653 N_("case insensitive matching")),
654 OPT_BOOLEAN('w', "word-regexp", &opt.word_regexp,
655 N_("match patterns only at word boundaries")),
656 OPT_SET_INT('a', "text", &opt.binary,
657 N_("process binary files as text"), GREP_BINARY_TEXT),
658 OPT_SET_INT('I', NULL, &opt.binary,
659 N_("don't match patterns in binary files"),
660 GREP_BINARY_NOMATCH),
661 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"),
662 N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
663 NULL, 1 },
664 OPT_GROUP(""),
665 OPT_SET_INT('E', "extended-regexp", &pattern_type_arg,
666 N_("use extended POSIX regular expressions"),
667 GREP_PATTERN_TYPE_ERE),
668 OPT_SET_INT('G', "basic-regexp", &pattern_type_arg,
669 N_("use basic POSIX regular expressions (default)"),
670 GREP_PATTERN_TYPE_BRE),
671 OPT_SET_INT('F', "fixed-strings", &pattern_type_arg,
672 N_("interpret patterns as fixed strings"),
673 GREP_PATTERN_TYPE_FIXED),
674 OPT_SET_INT('P', "perl-regexp", &pattern_type_arg,
675 N_("use Perl-compatible regular expressions"),
676 GREP_PATTERN_TYPE_PCRE),
677 OPT_GROUP(""),
678 OPT_BOOLEAN('n', "line-number", &opt.linenum, N_("show line numbers")),
679 OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1),
680 OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1),
681 OPT_NEGBIT(0, "full-name", &opt.relative,
682 N_("show filenames relative to top directory"), 1),
683 OPT_BOOLEAN('l', "files-with-matches", &opt.name_only,
684 N_("show only filenames instead of matching lines")),
685 OPT_BOOLEAN(0, "name-only", &opt.name_only,
686 N_("synonym for --files-with-matches")),
687 OPT_BOOLEAN('L', "files-without-match",
688 &opt.unmatch_name_only,
689 N_("show only the names of files without match")),
690 OPT_BOOLEAN('z', "null", &opt.null_following_name,
691 N_("print NUL after filenames")),
692 OPT_BOOLEAN('c', "count", &opt.count,
693 N_("show the number of matches instead of matching lines")),
694 OPT__COLOR(&opt.color, N_("highlight matches")),
695 OPT_BOOLEAN(0, "break", &opt.file_break,
696 N_("print empty line between matches from different files")),
697 OPT_BOOLEAN(0, "heading", &opt.heading,
698 N_("show filename only once above matches from same file")),
699 OPT_GROUP(""),
700 OPT_CALLBACK('C', "context", &opt, N_("n"),
701 N_("show <n> context lines before and after matches"),
702 context_callback),
703 OPT_INTEGER('B', "before-context", &opt.pre_context,
704 N_("show <n> context lines before matches")),
705 OPT_INTEGER('A', "after-context", &opt.post_context,
706 N_("show <n> context lines after matches")),
707 OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
708 context_callback),
709 OPT_BOOLEAN('p', "show-function", &opt.funcname,
710 N_("show a line with the function name before matches")),
711 OPT_BOOLEAN('W', "function-context", &opt.funcbody,
712 N_("show the surrounding function")),
713 OPT_GROUP(""),
714 OPT_CALLBACK('f', NULL, &opt, N_("file"),
715 N_("read patterns from file"), file_callback),
716 { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"),
717 N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback },
718 { OPTION_CALLBACK, 0, "and", &opt, NULL,
719 N_("combine patterns specified with -e"),
720 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
721 OPT_BOOLEAN(0, "or", &dummy, ""),
722 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
723 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
724 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
725 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
726 open_callback },
727 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
728 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
729 close_callback },
730 OPT__QUIET(&opt.status_only,
731 N_("indicate hit with exit status without output")),
732 OPT_BOOLEAN(0, "all-match", &opt.all_match,
733 N_("show only matches from files that match all patterns")),
734 { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
735 N_("show parse tree for grep expression"),
736 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
737 OPT_GROUP(""),
738 { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
739 N_("pager"), N_("show matching files in the pager"),
740 PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager },
741 OPT_BOOLEAN(0, "ext-grep", &external_grep_allowed__ignored,
742 N_("allow calling of grep(1) (ignored by this build)")),
743 { OPTION_CALLBACK, 0, "help-all", &options, NULL, N_("show usage"),
744 PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
745 OPT_END()
746 };
747
748 /*
749 * 'git grep -h', unlike 'git grep -h <pattern>', is a request
750 * to show usage information and exit.
751 */
752 if (argc == 2 && !strcmp(argv[1], "-h"))
753 usage_with_options(grep_usage, options);
754
755 init_grep_defaults();
756 git_config(grep_cmd_config, NULL);
757 grep_init(&opt, prefix);
758
759 /*
760 * If there is no -- then the paths must exist in the working
761 * tree. If there is no explicit pattern specified with -e or
762 * -f, we take the first unrecognized non option to be the
763 * pattern, but then what follows it must be zero or more
764 * valid refs up to the -- (if exists), and then existing
765 * paths. If there is an explicit pattern, then the first
766 * unrecognized non option is the beginning of the refs list
767 * that continues up to the -- (if exists), and then paths.
768 */
769 argc = parse_options(argc, argv, prefix, options, grep_usage,
770 PARSE_OPT_KEEP_DASHDASH |
771 PARSE_OPT_STOP_AT_NON_OPTION |
772 PARSE_OPT_NO_INTERNAL_HELP);
773 grep_commit_pattern_type(pattern_type_arg, &opt);
774
775 if (use_index && !startup_info->have_repository)
776 /* die the same way as if we did it at the beginning */
777 setup_git_directory();
778
779 /*
780 * skip a -- separator; we know it cannot be
781 * separating revisions from pathnames if
782 * we haven't even had any patterns yet
783 */
784 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
785 argv++;
786 argc--;
787 }
788
789 /* First unrecognized non-option token */
790 if (argc > 0 && !opt.pattern_list) {
791 append_grep_pattern(&opt, argv[0], "command line", 0,
792 GREP_PATTERN);
793 argv++;
794 argc--;
795 }
796
797 if (show_in_pager == default_pager)
798 show_in_pager = git_pager(1);
799 if (show_in_pager) {
800 opt.color = 0;
801 opt.name_only = 1;
802 opt.null_following_name = 1;
803 opt.output_priv = &path_list;
804 opt.output = append_path;
805 string_list_append(&path_list, show_in_pager);
806 use_threads = 0;
807 }
808
809 if (!opt.pattern_list)
810 die(_("no pattern given."));
811 if (!opt.fixed && opt.ignore_case)
812 opt.regflags |= REG_ICASE;
813
814 compile_grep_patterns(&opt);
815
816 /* Check revs and then paths */
817 for (i = 0; i < argc; i++) {
818 const char *arg = argv[i];
819 unsigned char sha1[20];
820 /* Is it a rev? */
821 if (!get_sha1(arg, sha1)) {
822 struct object *object = parse_object_or_die(sha1, arg);
823 if (!seen_dashdash)
824 verify_non_filename(prefix, arg);
825 add_object_array(object, arg, &list);
826 continue;
827 }
828 if (!strcmp(arg, "--")) {
829 i++;
830 seen_dashdash = 1;
831 }
832 break;
833 }
834
835 #ifndef NO_PTHREADS
836 if (list.nr || cached || online_cpus() == 1)
837 use_threads = 0;
838 #else
839 use_threads = 0;
840 #endif
841
842 #ifndef NO_PTHREADS
843 if (use_threads) {
844 if (!(opt.name_only || opt.unmatch_name_only || opt.count)
845 && (opt.pre_context || opt.post_context ||
846 opt.file_break || opt.funcbody))
847 skip_first_line = 1;
848 start_threads(&opt);
849 }
850 #endif
851
852 /* The rest are paths */
853 if (!seen_dashdash) {
854 int j;
855 for (j = i; j < argc; j++)
856 verify_filename(prefix, argv[j], j == i);
857 }
858
859 paths = get_pathspec(prefix, argv + i);
860 init_pathspec(&pathspec, paths);
861 pathspec.max_depth = opt.max_depth;
862 pathspec.recursive = 1;
863
864 if (show_in_pager && (cached || list.nr))
865 die(_("--open-files-in-pager only works on the worktree"));
866
867 if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
868 const char *pager = path_list.items[0].string;
869 int len = strlen(pager);
870
871 if (len > 4 && is_dir_sep(pager[len - 5]))
872 pager += len - 4;
873
874 if (!strcmp("less", pager) || !strcmp("vi", pager)) {
875 struct strbuf buf = STRBUF_INIT;
876 strbuf_addf(&buf, "+/%s%s",
877 strcmp("less", pager) ? "" : "*",
878 opt.pattern_list->pattern);
879 string_list_append(&path_list, buf.buf);
880 strbuf_detach(&buf, NULL);
881 }
882 }
883
884 if (!show_in_pager)
885 setup_pager();
886
887 if (!use_index && (untracked || cached))
888 die(_("--cached or --untracked cannot be used with --no-index."));
889
890 if (!use_index || untracked) {
891 int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
892 if (list.nr)
893 die(_("--no-index or --untracked cannot be used with revs."));
894 hit = grep_directory(&opt, &pathspec, use_exclude);
895 } else if (0 <= opt_exclude) {
896 die(_("--[no-]exclude-standard cannot be used for tracked contents."));
897 } else if (!list.nr) {
898 if (!cached)
899 setup_work_tree();
900
901 hit = grep_cache(&opt, &pathspec, cached);
902 } else {
903 if (cached)
904 die(_("both --cached and trees are given."));
905 hit = grep_objects(&opt, &pathspec, &list);
906 }
907
908 if (use_threads)
909 hit |= wait_all();
910 if (hit && show_in_pager)
911 run_pager(&opt, prefix);
912 free_grep_patterns(&opt);
913 return !hit;
914 }