Merge branch 'maint'
[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 #include "pathspec.h"
21
22 static char const * const grep_usage[] = {
23 N_("git grep [<options>] [-e] <pattern> [<rev>...] [[--] <path>...]"),
24 NULL
25 };
26
27 static int use_threads = 1;
28
29 #ifndef NO_PTHREADS
30 #define THREADS 8
31 static pthread_t threads[THREADS];
32
33 /* We use one producer thread and THREADS consumer
34 * threads. The producer adds struct work_items to 'todo' and the
35 * consumers pick work items from the same array.
36 */
37 struct work_item {
38 struct grep_source source;
39 char done;
40 struct strbuf out;
41 };
42
43 /* In the range [todo_done, todo_start) in 'todo' we have work_items
44 * that have been or are processed by a consumer thread. We haven't
45 * written the result for these to stdout yet.
46 *
47 * The work_items in [todo_start, todo_end) are waiting to be picked
48 * up by a consumer thread.
49 *
50 * The ranges are modulo TODO_SIZE.
51 */
52 #define TODO_SIZE 128
53 static struct work_item todo[TODO_SIZE];
54 static int todo_start;
55 static int todo_end;
56 static int todo_done;
57
58 /* Has all work items been added? */
59 static int all_work_added;
60
61 /* This lock protects all the variables above. */
62 static pthread_mutex_t grep_mutex;
63
64 static inline void grep_lock(void)
65 {
66 if (use_threads)
67 pthread_mutex_lock(&grep_mutex);
68 }
69
70 static inline void grep_unlock(void)
71 {
72 if (use_threads)
73 pthread_mutex_unlock(&grep_mutex);
74 }
75
76 /* Signalled when a new work_item is added to todo. */
77 static pthread_cond_t cond_add;
78
79 /* Signalled when the result from one work_item is written to
80 * stdout.
81 */
82 static pthread_cond_t cond_write;
83
84 /* Signalled when we are finished with everything. */
85 static pthread_cond_t cond_result;
86
87 static int skip_first_line;
88
89 static void add_work(struct grep_opt *opt, enum grep_source_type type,
90 const char *name, const char *path, const void *id)
91 {
92 grep_lock();
93
94 while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
95 pthread_cond_wait(&cond_write, &grep_mutex);
96 }
97
98 grep_source_init(&todo[todo_end].source, type, name, path, id);
99 if (opt->binary != GREP_BINARY_TEXT)
100 grep_source_load_driver(&todo[todo_end].source);
101 todo[todo_end].done = 0;
102 strbuf_reset(&todo[todo_end].out);
103 todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
104
105 pthread_cond_signal(&cond_add);
106 grep_unlock();
107 }
108
109 static struct work_item *get_work(void)
110 {
111 struct work_item *ret;
112
113 grep_lock();
114 while (todo_start == todo_end && !all_work_added) {
115 pthread_cond_wait(&cond_add, &grep_mutex);
116 }
117
118 if (todo_start == todo_end && all_work_added) {
119 ret = NULL;
120 } else {
121 ret = &todo[todo_start];
122 todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
123 }
124 grep_unlock();
125 return ret;
126 }
127
128 static void work_done(struct work_item *w)
129 {
130 int old_done;
131
132 grep_lock();
133 w->done = 1;
134 old_done = todo_done;
135 for(; todo[todo_done].done && todo_done != todo_start;
136 todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
137 w = &todo[todo_done];
138 if (w->out.len) {
139 const char *p = w->out.buf;
140 size_t len = w->out.len;
141
142 /* Skip the leading hunk mark of the first file. */
143 if (skip_first_line) {
144 while (len) {
145 len--;
146 if (*p++ == '\n')
147 break;
148 }
149 skip_first_line = 0;
150 }
151
152 write_or_die(1, p, len);
153 }
154 grep_source_clear(&w->source);
155 }
156
157 if (old_done != todo_done)
158 pthread_cond_signal(&cond_write);
159
160 if (all_work_added && todo_done == todo_end)
161 pthread_cond_signal(&cond_result);
162
163 grep_unlock();
164 }
165
166 static void *run(void *arg)
167 {
168 int hit = 0;
169 struct grep_opt *opt = arg;
170
171 while (1) {
172 struct work_item *w = get_work();
173 if (!w)
174 break;
175
176 opt->output_priv = w;
177 hit |= grep_source(opt, &w->source);
178 grep_source_clear_data(&w->source);
179 work_done(w);
180 }
181 free_grep_patterns(arg);
182 free(arg);
183
184 return (void*) (intptr_t) hit;
185 }
186
187 static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
188 {
189 struct work_item *w = opt->output_priv;
190 strbuf_add(&w->out, buf, size);
191 }
192
193 static void start_threads(struct grep_opt *opt)
194 {
195 int i;
196
197 pthread_mutex_init(&grep_mutex, NULL);
198 pthread_mutex_init(&grep_read_mutex, NULL);
199 pthread_mutex_init(&grep_attr_mutex, NULL);
200 pthread_cond_init(&cond_add, NULL);
201 pthread_cond_init(&cond_write, NULL);
202 pthread_cond_init(&cond_result, NULL);
203 grep_use_locks = 1;
204
205 for (i = 0; i < ARRAY_SIZE(todo); i++) {
206 strbuf_init(&todo[i].out, 0);
207 }
208
209 for (i = 0; i < ARRAY_SIZE(threads); i++) {
210 int err;
211 struct grep_opt *o = grep_opt_dup(opt);
212 o->output = strbuf_out;
213 o->debug = 0;
214 compile_grep_patterns(o);
215 err = pthread_create(&threads[i], NULL, run, o);
216
217 if (err)
218 die(_("grep: failed to create thread: %s"),
219 strerror(err));
220 }
221 }
222
223 static int wait_all(void)
224 {
225 int hit = 0;
226 int i;
227
228 grep_lock();
229 all_work_added = 1;
230
231 /* Wait until all work is done. */
232 while (todo_done != todo_end)
233 pthread_cond_wait(&cond_result, &grep_mutex);
234
235 /* Wake up all the consumer threads so they can see that there
236 * is no more work to do.
237 */
238 pthread_cond_broadcast(&cond_add);
239 grep_unlock();
240
241 for (i = 0; i < ARRAY_SIZE(threads); i++) {
242 void *h;
243 pthread_join(threads[i], &h);
244 hit |= (int) (intptr_t) h;
245 }
246
247 pthread_mutex_destroy(&grep_mutex);
248 pthread_mutex_destroy(&grep_read_mutex);
249 pthread_mutex_destroy(&grep_attr_mutex);
250 pthread_cond_destroy(&cond_add);
251 pthread_cond_destroy(&cond_write);
252 pthread_cond_destroy(&cond_result);
253 grep_use_locks = 0;
254
255 return hit;
256 }
257 #else /* !NO_PTHREADS */
258
259 static int wait_all(void)
260 {
261 return 0;
262 }
263 #endif
264
265 static int grep_cmd_config(const char *var, const char *value, void *cb)
266 {
267 int st = grep_config(var, value, cb);
268 if (git_color_default_config(var, value, cb) < 0)
269 st = -1;
270 return st;
271 }
272
273 static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
274 {
275 void *data;
276
277 grep_read_lock();
278 data = read_sha1_file(sha1, type, size);
279 grep_read_unlock();
280 return data;
281 }
282
283 static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
284 const char *filename, int tree_name_len,
285 const char *path)
286 {
287 struct strbuf pathbuf = STRBUF_INIT;
288
289 if (opt->relative && opt->prefix_length) {
290 quote_path_relative(filename + tree_name_len, opt->prefix, &pathbuf);
291 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
292 } else {
293 strbuf_addstr(&pathbuf, filename);
294 }
295
296 #ifndef NO_PTHREADS
297 if (use_threads) {
298 add_work(opt, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
299 strbuf_release(&pathbuf);
300 return 0;
301 } else
302 #endif
303 {
304 struct grep_source gs;
305 int hit;
306
307 grep_source_init(&gs, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
308 strbuf_release(&pathbuf);
309 hit = grep_source(opt, &gs);
310
311 grep_source_clear(&gs);
312 return hit;
313 }
314 }
315
316 static int grep_file(struct grep_opt *opt, const char *filename)
317 {
318 struct strbuf buf = STRBUF_INIT;
319
320 if (opt->relative && opt->prefix_length)
321 quote_path_relative(filename, opt->prefix, &buf);
322 else
323 strbuf_addstr(&buf, filename);
324
325 #ifndef NO_PTHREADS
326 if (use_threads) {
327 add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename);
328 strbuf_release(&buf);
329 return 0;
330 } else
331 #endif
332 {
333 struct grep_source gs;
334 int hit;
335
336 grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename);
337 strbuf_release(&buf);
338 hit = grep_source(opt, &gs);
339
340 grep_source_clear(&gs);
341 return hit;
342 }
343 }
344
345 static void append_path(struct grep_opt *opt, const void *data, size_t len)
346 {
347 struct string_list *path_list = opt->output_priv;
348
349 if (len == 1 && *(const char *)data == '\0')
350 return;
351 string_list_append(path_list, xstrndup(data, len));
352 }
353
354 static void run_pager(struct grep_opt *opt, const char *prefix)
355 {
356 struct string_list *path_list = opt->output_priv;
357 const char **argv = xmalloc(sizeof(const char *) * (path_list->nr + 1));
358 int i, status;
359
360 for (i = 0; i < path_list->nr; i++)
361 argv[i] = path_list->items[i].string;
362 argv[path_list->nr] = NULL;
363
364 status = run_command_v_opt_cd_env(argv, RUN_USING_SHELL, prefix, NULL);
365 if (status)
366 exit(status);
367 free(argv);
368 }
369
370 static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached)
371 {
372 int hit = 0;
373 int nr;
374 read_cache();
375
376 for (nr = 0; nr < active_nr; nr++) {
377 const struct cache_entry *ce = active_cache[nr];
378 if (!S_ISREG(ce->ce_mode))
379 continue;
380 if (!ce_path_match(ce, pathspec, NULL))
381 continue;
382 /*
383 * If CE_VALID is on, we assume worktree file and its cache entry
384 * are identical, even if worktree file has been modified, so use
385 * cache version instead
386 */
387 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
388 if (ce_stage(ce))
389 continue;
390 hit |= grep_sha1(opt, ce->sha1, ce->name, 0, ce->name);
391 }
392 else
393 hit |= grep_file(opt, ce->name);
394 if (ce_stage(ce)) {
395 do {
396 nr++;
397 } while (nr < active_nr &&
398 !strcmp(ce->name, active_cache[nr]->name));
399 nr--; /* compensate for loop control */
400 }
401 if (hit && opt->status_only)
402 break;
403 }
404 return hit;
405 }
406
407 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
408 struct tree_desc *tree, struct strbuf *base, int tn_len,
409 int check_attr)
410 {
411 int hit = 0;
412 enum interesting match = entry_not_interesting;
413 struct name_entry entry;
414 int old_baselen = base->len;
415
416 while (tree_entry(tree, &entry)) {
417 int te_len = tree_entry_len(&entry);
418
419 if (match != all_entries_interesting) {
420 match = tree_entry_interesting(&entry, base, tn_len, pathspec);
421 if (match == all_entries_not_interesting)
422 break;
423 if (match == entry_not_interesting)
424 continue;
425 }
426
427 strbuf_add(base, entry.path, te_len);
428
429 if (S_ISREG(entry.mode)) {
430 hit |= grep_sha1(opt, entry.sha1, base->buf, tn_len,
431 check_attr ? base->buf + tn_len : NULL);
432 }
433 else if (S_ISDIR(entry.mode)) {
434 enum object_type type;
435 struct tree_desc sub;
436 void *data;
437 unsigned long size;
438
439 data = lock_and_read_sha1_file(entry.sha1, &type, &size);
440 if (!data)
441 die(_("unable to read tree (%s)"),
442 sha1_to_hex(entry.sha1));
443
444 strbuf_addch(base, '/');
445 init_tree_desc(&sub, data, size);
446 hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
447 check_attr);
448 free(data);
449 }
450 strbuf_setlen(base, old_baselen);
451
452 if (hit && opt->status_only)
453 break;
454 }
455 return hit;
456 }
457
458 static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
459 struct object *obj, const char *name, const char *path)
460 {
461 if (obj->type == OBJ_BLOB)
462 return grep_sha1(opt, obj->oid.hash, name, 0, path);
463 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
464 struct tree_desc tree;
465 void *data;
466 unsigned long size;
467 struct strbuf base;
468 int hit, len;
469
470 grep_read_lock();
471 data = read_object_with_reference(obj->oid.hash, tree_type,
472 &size, NULL);
473 grep_read_unlock();
474
475 if (!data)
476 die(_("unable to read tree (%s)"), oid_to_hex(&obj->oid));
477
478 len = name ? strlen(name) : 0;
479 strbuf_init(&base, PATH_MAX + len + 1);
480 if (len) {
481 strbuf_add(&base, name, len);
482 strbuf_addch(&base, ':');
483 }
484 init_tree_desc(&tree, data, size);
485 hit = grep_tree(opt, pathspec, &tree, &base, base.len,
486 obj->type == OBJ_COMMIT);
487 strbuf_release(&base);
488 free(data);
489 return hit;
490 }
491 die(_("unable to grep from object of type %s"), typename(obj->type));
492 }
493
494 static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
495 const struct object_array *list)
496 {
497 unsigned int i;
498 int hit = 0;
499 const unsigned int nr = list->nr;
500
501 for (i = 0; i < nr; i++) {
502 struct object *real_obj;
503 real_obj = deref_tag(list->objects[i].item, NULL, 0);
504 if (grep_object(opt, pathspec, real_obj, list->objects[i].name, list->objects[i].path)) {
505 hit = 1;
506 if (opt->status_only)
507 break;
508 }
509 }
510 return hit;
511 }
512
513 static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
514 int exc_std)
515 {
516 struct dir_struct dir;
517 int i, hit = 0;
518
519 memset(&dir, 0, sizeof(dir));
520 if (exc_std)
521 setup_standard_excludes(&dir);
522
523 fill_directory(&dir, pathspec);
524 for (i = 0; i < dir.nr; i++) {
525 if (!dir_path_match(dir.entries[i], pathspec, 0, NULL))
526 continue;
527 hit |= grep_file(opt, dir.entries[i]->name);
528 if (hit && opt->status_only)
529 break;
530 }
531 return hit;
532 }
533
534 static int context_callback(const struct option *opt, const char *arg,
535 int unset)
536 {
537 struct grep_opt *grep_opt = opt->value;
538 int value;
539 const char *endp;
540
541 if (unset) {
542 grep_opt->pre_context = grep_opt->post_context = 0;
543 return 0;
544 }
545 value = strtol(arg, (char **)&endp, 10);
546 if (*endp) {
547 return error(_("switch `%c' expects a numerical value"),
548 opt->short_name);
549 }
550 grep_opt->pre_context = grep_opt->post_context = value;
551 return 0;
552 }
553
554 static int file_callback(const struct option *opt, const char *arg, int unset)
555 {
556 struct grep_opt *grep_opt = opt->value;
557 int from_stdin = !strcmp(arg, "-");
558 FILE *patterns;
559 int lno = 0;
560 struct strbuf sb = STRBUF_INIT;
561
562 patterns = from_stdin ? stdin : fopen(arg, "r");
563 if (!patterns)
564 die_errno(_("cannot open '%s'"), arg);
565 while (strbuf_getline(&sb, patterns, '\n') == 0) {
566 /* ignore empty line like grep does */
567 if (sb.len == 0)
568 continue;
569
570 append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
571 GREP_PATTERN);
572 }
573 if (!from_stdin)
574 fclose(patterns);
575 strbuf_release(&sb);
576 return 0;
577 }
578
579 static int not_callback(const struct option *opt, const char *arg, int unset)
580 {
581 struct grep_opt *grep_opt = opt->value;
582 append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
583 return 0;
584 }
585
586 static int and_callback(const struct option *opt, const char *arg, int unset)
587 {
588 struct grep_opt *grep_opt = opt->value;
589 append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
590 return 0;
591 }
592
593 static int open_callback(const struct option *opt, const char *arg, int unset)
594 {
595 struct grep_opt *grep_opt = opt->value;
596 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
597 return 0;
598 }
599
600 static int close_callback(const struct option *opt, const char *arg, int unset)
601 {
602 struct grep_opt *grep_opt = opt->value;
603 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
604 return 0;
605 }
606
607 static int pattern_callback(const struct option *opt, const char *arg,
608 int unset)
609 {
610 struct grep_opt *grep_opt = opt->value;
611 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
612 return 0;
613 }
614
615 int cmd_grep(int argc, const char **argv, const char *prefix)
616 {
617 int hit = 0;
618 int cached = 0, untracked = 0, opt_exclude = -1;
619 int seen_dashdash = 0;
620 int external_grep_allowed__ignored;
621 const char *show_in_pager = NULL, *default_pager = "dummy";
622 struct grep_opt opt;
623 struct object_array list = OBJECT_ARRAY_INIT;
624 struct pathspec pathspec;
625 struct string_list path_list = STRING_LIST_INIT_NODUP;
626 int i;
627 int dummy;
628 int use_index = 1;
629 int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
630
631 struct option options[] = {
632 OPT_BOOL(0, "cached", &cached,
633 N_("search in index instead of in the work tree")),
634 OPT_NEGBIT(0, "no-index", &use_index,
635 N_("find in contents not managed by git"), 1),
636 OPT_BOOL(0, "untracked", &untracked,
637 N_("search in both tracked and untracked files")),
638 OPT_SET_INT(0, "exclude-standard", &opt_exclude,
639 N_("ignore files specified via '.gitignore'"), 1),
640 OPT_GROUP(""),
641 OPT_BOOL('v', "invert-match", &opt.invert,
642 N_("show non-matching lines")),
643 OPT_BOOL('i', "ignore-case", &opt.ignore_case,
644 N_("case insensitive matching")),
645 OPT_BOOL('w', "word-regexp", &opt.word_regexp,
646 N_("match patterns only at word boundaries")),
647 OPT_SET_INT('a', "text", &opt.binary,
648 N_("process binary files as text"), GREP_BINARY_TEXT),
649 OPT_SET_INT('I', NULL, &opt.binary,
650 N_("don't match patterns in binary files"),
651 GREP_BINARY_NOMATCH),
652 OPT_BOOL(0, "textconv", &opt.allow_textconv,
653 N_("process binary files with textconv filters")),
654 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"),
655 N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
656 NULL, 1 },
657 OPT_GROUP(""),
658 OPT_SET_INT('E', "extended-regexp", &pattern_type_arg,
659 N_("use extended POSIX regular expressions"),
660 GREP_PATTERN_TYPE_ERE),
661 OPT_SET_INT('G', "basic-regexp", &pattern_type_arg,
662 N_("use basic POSIX regular expressions (default)"),
663 GREP_PATTERN_TYPE_BRE),
664 OPT_SET_INT('F', "fixed-strings", &pattern_type_arg,
665 N_("interpret patterns as fixed strings"),
666 GREP_PATTERN_TYPE_FIXED),
667 OPT_SET_INT('P', "perl-regexp", &pattern_type_arg,
668 N_("use Perl-compatible regular expressions"),
669 GREP_PATTERN_TYPE_PCRE),
670 OPT_GROUP(""),
671 OPT_BOOL('n', "line-number", &opt.linenum, N_("show line numbers")),
672 OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1),
673 OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1),
674 OPT_NEGBIT(0, "full-name", &opt.relative,
675 N_("show filenames relative to top directory"), 1),
676 OPT_BOOL('l', "files-with-matches", &opt.name_only,
677 N_("show only filenames instead of matching lines")),
678 OPT_BOOL(0, "name-only", &opt.name_only,
679 N_("synonym for --files-with-matches")),
680 OPT_BOOL('L', "files-without-match",
681 &opt.unmatch_name_only,
682 N_("show only the names of files without match")),
683 OPT_BOOL('z', "null", &opt.null_following_name,
684 N_("print NUL after filenames")),
685 OPT_BOOL('c', "count", &opt.count,
686 N_("show the number of matches instead of matching lines")),
687 OPT__COLOR(&opt.color, N_("highlight matches")),
688 OPT_BOOL(0, "break", &opt.file_break,
689 N_("print empty line between matches from different files")),
690 OPT_BOOL(0, "heading", &opt.heading,
691 N_("show filename only once above matches from same file")),
692 OPT_GROUP(""),
693 OPT_CALLBACK('C', "context", &opt, N_("n"),
694 N_("show <n> context lines before and after matches"),
695 context_callback),
696 OPT_INTEGER('B', "before-context", &opt.pre_context,
697 N_("show <n> context lines before matches")),
698 OPT_INTEGER('A', "after-context", &opt.post_context,
699 N_("show <n> context lines after matches")),
700 OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
701 context_callback),
702 OPT_BOOL('p', "show-function", &opt.funcname,
703 N_("show a line with the function name before matches")),
704 OPT_BOOL('W', "function-context", &opt.funcbody,
705 N_("show the surrounding function")),
706 OPT_GROUP(""),
707 OPT_CALLBACK('f', NULL, &opt, N_("file"),
708 N_("read patterns from file"), file_callback),
709 { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"),
710 N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback },
711 { OPTION_CALLBACK, 0, "and", &opt, NULL,
712 N_("combine patterns specified with -e"),
713 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
714 OPT_BOOL(0, "or", &dummy, ""),
715 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
716 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
717 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
718 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
719 open_callback },
720 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
721 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
722 close_callback },
723 OPT__QUIET(&opt.status_only,
724 N_("indicate hit with exit status without output")),
725 OPT_BOOL(0, "all-match", &opt.all_match,
726 N_("show only matches from files that match all patterns")),
727 { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
728 N_("show parse tree for grep expression"),
729 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
730 OPT_GROUP(""),
731 { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
732 N_("pager"), N_("show matching files in the pager"),
733 PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager },
734 OPT_BOOL(0, "ext-grep", &external_grep_allowed__ignored,
735 N_("allow calling of grep(1) (ignored by this build)")),
736 OPT_END()
737 };
738
739 init_grep_defaults();
740 git_config(grep_cmd_config, NULL);
741 grep_init(&opt, prefix);
742
743 /*
744 * If there is no -- then the paths must exist in the working
745 * tree. If there is no explicit pattern specified with -e or
746 * -f, we take the first unrecognized non option to be the
747 * pattern, but then what follows it must be zero or more
748 * valid refs up to the -- (if exists), and then existing
749 * paths. If there is an explicit pattern, then the first
750 * unrecognized non option is the beginning of the refs list
751 * that continues up to the -- (if exists), and then paths.
752 */
753 argc = parse_options(argc, argv, prefix, options, grep_usage,
754 PARSE_OPT_KEEP_DASHDASH |
755 PARSE_OPT_STOP_AT_NON_OPTION);
756 grep_commit_pattern_type(pattern_type_arg, &opt);
757
758 if (use_index && !startup_info->have_repository)
759 /* die the same way as if we did it at the beginning */
760 setup_git_directory();
761
762 /*
763 * skip a -- separator; we know it cannot be
764 * separating revisions from pathnames if
765 * we haven't even had any patterns yet
766 */
767 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
768 argv++;
769 argc--;
770 }
771
772 /* First unrecognized non-option token */
773 if (argc > 0 && !opt.pattern_list) {
774 append_grep_pattern(&opt, argv[0], "command line", 0,
775 GREP_PATTERN);
776 argv++;
777 argc--;
778 }
779
780 if (show_in_pager == default_pager)
781 show_in_pager = git_pager(1);
782 if (show_in_pager) {
783 opt.color = 0;
784 opt.name_only = 1;
785 opt.null_following_name = 1;
786 opt.output_priv = &path_list;
787 opt.output = append_path;
788 string_list_append(&path_list, show_in_pager);
789 use_threads = 0;
790 }
791
792 if (!opt.pattern_list)
793 die(_("no pattern given."));
794 if (!opt.fixed && opt.ignore_case)
795 opt.regflags |= REG_ICASE;
796
797 compile_grep_patterns(&opt);
798
799 /* Check revs and then paths */
800 for (i = 0; i < argc; i++) {
801 const char *arg = argv[i];
802 unsigned char sha1[20];
803 struct object_context oc;
804 /* Is it a rev? */
805 if (!get_sha1_with_context(arg, 0, sha1, &oc)) {
806 struct object *object = parse_object_or_die(sha1, arg);
807 if (!seen_dashdash)
808 verify_non_filename(prefix, arg);
809 add_object_array_with_path(object, arg, &list, oc.mode, oc.path);
810 continue;
811 }
812 if (!strcmp(arg, "--")) {
813 i++;
814 seen_dashdash = 1;
815 }
816 break;
817 }
818
819 #ifndef NO_PTHREADS
820 if (list.nr || cached || online_cpus() == 1)
821 use_threads = 0;
822 #else
823 use_threads = 0;
824 #endif
825
826 #ifndef NO_PTHREADS
827 if (use_threads) {
828 if (!(opt.name_only || opt.unmatch_name_only || opt.count)
829 && (opt.pre_context || opt.post_context ||
830 opt.file_break || opt.funcbody))
831 skip_first_line = 1;
832 start_threads(&opt);
833 }
834 #endif
835
836 /* The rest are paths */
837 if (!seen_dashdash) {
838 int j;
839 for (j = i; j < argc; j++)
840 verify_filename(prefix, argv[j], j == i);
841 }
842
843 parse_pathspec(&pathspec, 0,
844 PATHSPEC_PREFER_CWD |
845 (opt.max_depth != -1 ? PATHSPEC_MAXDEPTH_VALID : 0),
846 prefix, argv + i);
847 pathspec.max_depth = opt.max_depth;
848 pathspec.recursive = 1;
849
850 if (show_in_pager && (cached || list.nr))
851 die(_("--open-files-in-pager only works on the worktree"));
852
853 if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
854 const char *pager = path_list.items[0].string;
855 int len = strlen(pager);
856
857 if (len > 4 && is_dir_sep(pager[len - 5]))
858 pager += len - 4;
859
860 if (opt.ignore_case && !strcmp("less", pager))
861 string_list_append(&path_list, "-I");
862
863 if (!strcmp("less", pager) || !strcmp("vi", pager)) {
864 struct strbuf buf = STRBUF_INIT;
865 strbuf_addf(&buf, "+/%s%s",
866 strcmp("less", pager) ? "" : "*",
867 opt.pattern_list->pattern);
868 string_list_append(&path_list, buf.buf);
869 strbuf_detach(&buf, NULL);
870 }
871 }
872
873 if (!show_in_pager && !opt.status_only)
874 setup_pager();
875
876 if (!use_index && (untracked || cached))
877 die(_("--cached or --untracked cannot be used with --no-index."));
878
879 if (!use_index || untracked) {
880 int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
881 if (list.nr)
882 die(_("--no-index or --untracked cannot be used with revs."));
883 hit = grep_directory(&opt, &pathspec, use_exclude);
884 } else if (0 <= opt_exclude) {
885 die(_("--[no-]exclude-standard cannot be used for tracked contents."));
886 } else if (!list.nr) {
887 if (!cached)
888 setup_work_tree();
889
890 hit = grep_cache(&opt, &pathspec, cached);
891 } else {
892 if (cached)
893 die(_("both --cached and trees are given."));
894 hit = grep_objects(&opt, &pathspec, &list);
895 }
896
897 if (use_threads)
898 hit |= wait_all();
899 if (hit && show_in_pager)
900 run_pager(&opt, prefix);
901 free_grep_patterns(&opt);
902 return !hit;
903 }