Travis: also test on 32-bit Linux
[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 #define GREP_NUM_THREADS_DEFAULT 8
28 static int num_threads;
29
30 #ifndef NO_PTHREADS
31 static pthread_t *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 (num_threads)
67 pthread_mutex_lock(&grep_mutex);
68 }
69
70 static inline void grep_unlock(void)
71 {
72 if (num_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 threads = xcalloc(num_threads, sizeof(*threads));
210 for (i = 0; i < num_threads; i++) {
211 int err;
212 struct grep_opt *o = grep_opt_dup(opt);
213 o->output = strbuf_out;
214 o->debug = 0;
215 compile_grep_patterns(o);
216 err = pthread_create(&threads[i], NULL, run, o);
217
218 if (err)
219 die(_("grep: failed to create thread: %s"),
220 strerror(err));
221 }
222 }
223
224 static int wait_all(void)
225 {
226 int hit = 0;
227 int i;
228
229 grep_lock();
230 all_work_added = 1;
231
232 /* Wait until all work is done. */
233 while (todo_done != todo_end)
234 pthread_cond_wait(&cond_result, &grep_mutex);
235
236 /* Wake up all the consumer threads so they can see that there
237 * is no more work to do.
238 */
239 pthread_cond_broadcast(&cond_add);
240 grep_unlock();
241
242 for (i = 0; i < num_threads; i++) {
243 void *h;
244 pthread_join(threads[i], &h);
245 hit |= (int) (intptr_t) h;
246 }
247
248 free(threads);
249
250 pthread_mutex_destroy(&grep_mutex);
251 pthread_mutex_destroy(&grep_read_mutex);
252 pthread_mutex_destroy(&grep_attr_mutex);
253 pthread_cond_destroy(&cond_add);
254 pthread_cond_destroy(&cond_write);
255 pthread_cond_destroy(&cond_result);
256 grep_use_locks = 0;
257
258 return hit;
259 }
260 #else /* !NO_PTHREADS */
261
262 static int wait_all(void)
263 {
264 return 0;
265 }
266 #endif
267
268 static int grep_cmd_config(const char *var, const char *value, void *cb)
269 {
270 int st = grep_config(var, value, cb);
271 if (git_color_default_config(var, value, cb) < 0)
272 st = -1;
273
274 if (!strcmp(var, "grep.threads")) {
275 num_threads = git_config_int(var, value);
276 if (num_threads < 0)
277 die(_("invalid number of threads specified (%d) for %s"),
278 num_threads, var);
279 }
280
281 return st;
282 }
283
284 static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
285 {
286 void *data;
287
288 grep_read_lock();
289 data = read_sha1_file(sha1, type, size);
290 grep_read_unlock();
291 return data;
292 }
293
294 static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
295 const char *filename, int tree_name_len,
296 const char *path)
297 {
298 struct strbuf pathbuf = STRBUF_INIT;
299
300 if (opt->relative && opt->prefix_length) {
301 quote_path_relative(filename + tree_name_len, opt->prefix, &pathbuf);
302 strbuf_insert(&pathbuf, 0, filename, tree_name_len);
303 } else {
304 strbuf_addstr(&pathbuf, filename);
305 }
306
307 #ifndef NO_PTHREADS
308 if (num_threads) {
309 add_work(opt, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
310 strbuf_release(&pathbuf);
311 return 0;
312 } else
313 #endif
314 {
315 struct grep_source gs;
316 int hit;
317
318 grep_source_init(&gs, GREP_SOURCE_SHA1, pathbuf.buf, path, sha1);
319 strbuf_release(&pathbuf);
320 hit = grep_source(opt, &gs);
321
322 grep_source_clear(&gs);
323 return hit;
324 }
325 }
326
327 static int grep_file(struct grep_opt *opt, const char *filename)
328 {
329 struct strbuf buf = STRBUF_INIT;
330
331 if (opt->relative && opt->prefix_length)
332 quote_path_relative(filename, opt->prefix, &buf);
333 else
334 strbuf_addstr(&buf, filename);
335
336 #ifndef NO_PTHREADS
337 if (num_threads) {
338 add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename);
339 strbuf_release(&buf);
340 return 0;
341 } else
342 #endif
343 {
344 struct grep_source gs;
345 int hit;
346
347 grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename);
348 strbuf_release(&buf);
349 hit = grep_source(opt, &gs);
350
351 grep_source_clear(&gs);
352 return hit;
353 }
354 }
355
356 static void append_path(struct grep_opt *opt, const void *data, size_t len)
357 {
358 struct string_list *path_list = opt->output_priv;
359
360 if (len == 1 && *(const char *)data == '\0')
361 return;
362 string_list_append(path_list, xstrndup(data, len));
363 }
364
365 static void run_pager(struct grep_opt *opt, const char *prefix)
366 {
367 struct string_list *path_list = opt->output_priv;
368 struct child_process child = CHILD_PROCESS_INIT;
369 int i, status;
370
371 for (i = 0; i < path_list->nr; i++)
372 argv_array_push(&child.args, path_list->items[i].string);
373 child.dir = prefix;
374 child.use_shell = 1;
375
376 status = run_command(&child);
377 if (status)
378 exit(status);
379 }
380
381 static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, int cached)
382 {
383 int hit = 0;
384 int nr;
385 read_cache();
386
387 for (nr = 0; nr < active_nr; nr++) {
388 const struct cache_entry *ce = active_cache[nr];
389 if (!S_ISREG(ce->ce_mode))
390 continue;
391 if (!ce_path_match(ce, pathspec, NULL))
392 continue;
393 /*
394 * If CE_VALID is on, we assume worktree file and its cache entry
395 * are identical, even if worktree file has been modified, so use
396 * cache version instead
397 */
398 if (cached || (ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) {
399 if (ce_stage(ce) || ce_intent_to_add(ce))
400 continue;
401 hit |= grep_sha1(opt, ce->oid.hash, ce->name, 0,
402 ce->name);
403 }
404 else
405 hit |= grep_file(opt, ce->name);
406 if (ce_stage(ce)) {
407 do {
408 nr++;
409 } while (nr < active_nr &&
410 !strcmp(ce->name, active_cache[nr]->name));
411 nr--; /* compensate for loop control */
412 }
413 if (hit && opt->status_only)
414 break;
415 }
416 return hit;
417 }
418
419 static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
420 struct tree_desc *tree, struct strbuf *base, int tn_len,
421 int check_attr)
422 {
423 int hit = 0;
424 enum interesting match = entry_not_interesting;
425 struct name_entry entry;
426 int old_baselen = base->len;
427
428 while (tree_entry(tree, &entry)) {
429 int te_len = tree_entry_len(&entry);
430
431 if (match != all_entries_interesting) {
432 match = tree_entry_interesting(&entry, base, tn_len, pathspec);
433 if (match == all_entries_not_interesting)
434 break;
435 if (match == entry_not_interesting)
436 continue;
437 }
438
439 strbuf_add(base, entry.path, te_len);
440
441 if (S_ISREG(entry.mode)) {
442 hit |= grep_sha1(opt, entry.oid->hash, base->buf, tn_len,
443 check_attr ? base->buf + tn_len : NULL);
444 }
445 else if (S_ISDIR(entry.mode)) {
446 enum object_type type;
447 struct tree_desc sub;
448 void *data;
449 unsigned long size;
450
451 data = lock_and_read_sha1_file(entry.oid->hash, &type, &size);
452 if (!data)
453 die(_("unable to read tree (%s)"),
454 oid_to_hex(entry.oid));
455
456 strbuf_addch(base, '/');
457 init_tree_desc(&sub, data, size);
458 hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
459 check_attr);
460 free(data);
461 }
462 strbuf_setlen(base, old_baselen);
463
464 if (hit && opt->status_only)
465 break;
466 }
467 return hit;
468 }
469
470 static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
471 struct object *obj, const char *name, const char *path)
472 {
473 if (obj->type == OBJ_BLOB)
474 return grep_sha1(opt, obj->oid.hash, name, 0, path);
475 if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
476 struct tree_desc tree;
477 void *data;
478 unsigned long size;
479 struct strbuf base;
480 int hit, len;
481
482 grep_read_lock();
483 data = read_object_with_reference(obj->oid.hash, tree_type,
484 &size, NULL);
485 grep_read_unlock();
486
487 if (!data)
488 die(_("unable to read tree (%s)"), oid_to_hex(&obj->oid));
489
490 len = name ? strlen(name) : 0;
491 strbuf_init(&base, PATH_MAX + len + 1);
492 if (len) {
493 strbuf_add(&base, name, len);
494 strbuf_addch(&base, ':');
495 }
496 init_tree_desc(&tree, data, size);
497 hit = grep_tree(opt, pathspec, &tree, &base, base.len,
498 obj->type == OBJ_COMMIT);
499 strbuf_release(&base);
500 free(data);
501 return hit;
502 }
503 die(_("unable to grep from object of type %s"), typename(obj->type));
504 }
505
506 static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
507 const struct object_array *list)
508 {
509 unsigned int i;
510 int hit = 0;
511 const unsigned int nr = list->nr;
512
513 for (i = 0; i < nr; i++) {
514 struct object *real_obj;
515 real_obj = deref_tag(list->objects[i].item, NULL, 0);
516 if (grep_object(opt, pathspec, real_obj, list->objects[i].name, list->objects[i].path)) {
517 hit = 1;
518 if (opt->status_only)
519 break;
520 }
521 }
522 return hit;
523 }
524
525 static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
526 int exc_std, int use_index)
527 {
528 struct dir_struct dir;
529 int i, hit = 0;
530
531 memset(&dir, 0, sizeof(dir));
532 if (!use_index)
533 dir.flags |= DIR_NO_GITLINKS;
534 if (exc_std)
535 setup_standard_excludes(&dir);
536
537 fill_directory(&dir, pathspec);
538 for (i = 0; i < dir.nr; i++) {
539 if (!dir_path_match(dir.entries[i], pathspec, 0, NULL))
540 continue;
541 hit |= grep_file(opt, dir.entries[i]->name);
542 if (hit && opt->status_only)
543 break;
544 }
545 return hit;
546 }
547
548 static int context_callback(const struct option *opt, const char *arg,
549 int unset)
550 {
551 struct grep_opt *grep_opt = opt->value;
552 int value;
553 const char *endp;
554
555 if (unset) {
556 grep_opt->pre_context = grep_opt->post_context = 0;
557 return 0;
558 }
559 value = strtol(arg, (char **)&endp, 10);
560 if (*endp) {
561 return error(_("switch `%c' expects a numerical value"),
562 opt->short_name);
563 }
564 grep_opt->pre_context = grep_opt->post_context = value;
565 return 0;
566 }
567
568 static int file_callback(const struct option *opt, const char *arg, int unset)
569 {
570 struct grep_opt *grep_opt = opt->value;
571 int from_stdin = !strcmp(arg, "-");
572 FILE *patterns;
573 int lno = 0;
574 struct strbuf sb = STRBUF_INIT;
575
576 patterns = from_stdin ? stdin : fopen(arg, "r");
577 if (!patterns)
578 die_errno(_("cannot open '%s'"), arg);
579 while (strbuf_getline(&sb, patterns) == 0) {
580 /* ignore empty line like grep does */
581 if (sb.len == 0)
582 continue;
583
584 append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
585 GREP_PATTERN);
586 }
587 if (!from_stdin)
588 fclose(patterns);
589 strbuf_release(&sb);
590 return 0;
591 }
592
593 static int not_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, "--not", "command line", 0, GREP_NOT);
597 return 0;
598 }
599
600 static int and_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, "--and", "command line", 0, GREP_AND);
604 return 0;
605 }
606
607 static int open_callback(const struct option *opt, const char *arg, int unset)
608 {
609 struct grep_opt *grep_opt = opt->value;
610 append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
611 return 0;
612 }
613
614 static int close_callback(const struct option *opt, const char *arg, int unset)
615 {
616 struct grep_opt *grep_opt = opt->value;
617 append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
618 return 0;
619 }
620
621 static int pattern_callback(const struct option *opt, const char *arg,
622 int unset)
623 {
624 struct grep_opt *grep_opt = opt->value;
625 append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
626 return 0;
627 }
628
629 int cmd_grep(int argc, const char **argv, const char *prefix)
630 {
631 int hit = 0;
632 int cached = 0, untracked = 0, opt_exclude = -1;
633 int seen_dashdash = 0;
634 int external_grep_allowed__ignored;
635 const char *show_in_pager = NULL, *default_pager = "dummy";
636 struct grep_opt opt;
637 struct object_array list = OBJECT_ARRAY_INIT;
638 struct pathspec pathspec;
639 struct string_list path_list = STRING_LIST_INIT_NODUP;
640 int i;
641 int dummy;
642 int use_index = 1;
643 int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
644
645 struct option options[] = {
646 OPT_BOOL(0, "cached", &cached,
647 N_("search in index instead of in the work tree")),
648 OPT_NEGBIT(0, "no-index", &use_index,
649 N_("find in contents not managed by git"), 1),
650 OPT_BOOL(0, "untracked", &untracked,
651 N_("search in both tracked and untracked files")),
652 OPT_SET_INT(0, "exclude-standard", &opt_exclude,
653 N_("ignore files specified via '.gitignore'"), 1),
654 OPT_GROUP(""),
655 OPT_BOOL('v', "invert-match", &opt.invert,
656 N_("show non-matching lines")),
657 OPT_BOOL('i', "ignore-case", &opt.ignore_case,
658 N_("case insensitive matching")),
659 OPT_BOOL('w', "word-regexp", &opt.word_regexp,
660 N_("match patterns only at word boundaries")),
661 OPT_SET_INT('a', "text", &opt.binary,
662 N_("process binary files as text"), GREP_BINARY_TEXT),
663 OPT_SET_INT('I', NULL, &opt.binary,
664 N_("don't match patterns in binary files"),
665 GREP_BINARY_NOMATCH),
666 OPT_BOOL(0, "textconv", &opt.allow_textconv,
667 N_("process binary files with textconv filters")),
668 { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"),
669 N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
670 NULL, 1 },
671 OPT_GROUP(""),
672 OPT_SET_INT('E', "extended-regexp", &pattern_type_arg,
673 N_("use extended POSIX regular expressions"),
674 GREP_PATTERN_TYPE_ERE),
675 OPT_SET_INT('G', "basic-regexp", &pattern_type_arg,
676 N_("use basic POSIX regular expressions (default)"),
677 GREP_PATTERN_TYPE_BRE),
678 OPT_SET_INT('F', "fixed-strings", &pattern_type_arg,
679 N_("interpret patterns as fixed strings"),
680 GREP_PATTERN_TYPE_FIXED),
681 OPT_SET_INT('P', "perl-regexp", &pattern_type_arg,
682 N_("use Perl-compatible regular expressions"),
683 GREP_PATTERN_TYPE_PCRE),
684 OPT_GROUP(""),
685 OPT_BOOL('n', "line-number", &opt.linenum, N_("show line numbers")),
686 OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1),
687 OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1),
688 OPT_NEGBIT(0, "full-name", &opt.relative,
689 N_("show filenames relative to top directory"), 1),
690 OPT_BOOL('l', "files-with-matches", &opt.name_only,
691 N_("show only filenames instead of matching lines")),
692 OPT_BOOL(0, "name-only", &opt.name_only,
693 N_("synonym for --files-with-matches")),
694 OPT_BOOL('L', "files-without-match",
695 &opt.unmatch_name_only,
696 N_("show only the names of files without match")),
697 OPT_BOOL('z', "null", &opt.null_following_name,
698 N_("print NUL after filenames")),
699 OPT_BOOL('c', "count", &opt.count,
700 N_("show the number of matches instead of matching lines")),
701 OPT__COLOR(&opt.color, N_("highlight matches")),
702 OPT_BOOL(0, "break", &opt.file_break,
703 N_("print empty line between matches from different files")),
704 OPT_BOOL(0, "heading", &opt.heading,
705 N_("show filename only once above matches from same file")),
706 OPT_GROUP(""),
707 OPT_CALLBACK('C', "context", &opt, N_("n"),
708 N_("show <n> context lines before and after matches"),
709 context_callback),
710 OPT_INTEGER('B', "before-context", &opt.pre_context,
711 N_("show <n> context lines before matches")),
712 OPT_INTEGER('A', "after-context", &opt.post_context,
713 N_("show <n> context lines after matches")),
714 OPT_INTEGER(0, "threads", &num_threads,
715 N_("use <n> worker threads")),
716 OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
717 context_callback),
718 OPT_BOOL('p', "show-function", &opt.funcname,
719 N_("show a line with the function name before matches")),
720 OPT_BOOL('W', "function-context", &opt.funcbody,
721 N_("show the surrounding function")),
722 OPT_GROUP(""),
723 OPT_CALLBACK('f', NULL, &opt, N_("file"),
724 N_("read patterns from file"), file_callback),
725 { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"),
726 N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback },
727 { OPTION_CALLBACK, 0, "and", &opt, NULL,
728 N_("combine patterns specified with -e"),
729 PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
730 OPT_BOOL(0, "or", &dummy, ""),
731 { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
732 PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
733 { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
734 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
735 open_callback },
736 { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
737 PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
738 close_callback },
739 OPT__QUIET(&opt.status_only,
740 N_("indicate hit with exit status without output")),
741 OPT_BOOL(0, "all-match", &opt.all_match,
742 N_("show only matches from files that match all patterns")),
743 { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
744 N_("show parse tree for grep expression"),
745 PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
746 OPT_GROUP(""),
747 { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
748 N_("pager"), N_("show matching files in the pager"),
749 PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager },
750 OPT_BOOL(0, "ext-grep", &external_grep_allowed__ignored,
751 N_("allow calling of grep(1) (ignored by this build)")),
752 OPT_END()
753 };
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 grep_commit_pattern_type(pattern_type_arg, &opt);
773
774 if (use_index && !startup_info->have_repository) {
775 int fallback = 0;
776 git_config_get_bool("grep.fallbacktonoindex", &fallback);
777 if (fallback)
778 use_index = 0;
779 else
780 /* die the same way as if we did it at the beginning */
781 setup_git_directory();
782 }
783
784 /*
785 * skip a -- separator; we know it cannot be
786 * separating revisions from pathnames if
787 * we haven't even had any patterns yet
788 */
789 if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
790 argv++;
791 argc--;
792 }
793
794 /* First unrecognized non-option token */
795 if (argc > 0 && !opt.pattern_list) {
796 append_grep_pattern(&opt, argv[0], "command line", 0,
797 GREP_PATTERN);
798 argv++;
799 argc--;
800 }
801
802 if (show_in_pager == default_pager)
803 show_in_pager = git_pager(1);
804 if (show_in_pager) {
805 opt.color = 0;
806 opt.name_only = 1;
807 opt.null_following_name = 1;
808 opt.output_priv = &path_list;
809 opt.output = append_path;
810 string_list_append(&path_list, show_in_pager);
811 }
812
813 if (!opt.pattern_list)
814 die(_("no pattern given."));
815 if (!opt.fixed && opt.ignore_case)
816 opt.regflags |= REG_ICASE;
817
818 compile_grep_patterns(&opt);
819
820 /* Check revs and then paths */
821 for (i = 0; i < argc; i++) {
822 const char *arg = argv[i];
823 unsigned char sha1[20];
824 struct object_context oc;
825 /* Is it a rev? */
826 if (!get_sha1_with_context(arg, 0, sha1, &oc)) {
827 struct object *object = parse_object_or_die(sha1, arg);
828 if (!seen_dashdash)
829 verify_non_filename(prefix, arg);
830 add_object_array_with_path(object, arg, &list, oc.mode, oc.path);
831 continue;
832 }
833 if (!strcmp(arg, "--")) {
834 i++;
835 seen_dashdash = 1;
836 }
837 break;
838 }
839
840 #ifndef NO_PTHREADS
841 if (list.nr || cached || show_in_pager)
842 num_threads = 0;
843 else if (num_threads == 0)
844 num_threads = GREP_NUM_THREADS_DEFAULT;
845 else if (num_threads < 0)
846 die(_("invalid number of threads specified (%d)"), num_threads);
847 #else
848 num_threads = 0;
849 #endif
850
851 #ifndef NO_PTHREADS
852 if (num_threads) {
853 if (!(opt.name_only || opt.unmatch_name_only || opt.count)
854 && (opt.pre_context || opt.post_context ||
855 opt.file_break || opt.funcbody))
856 skip_first_line = 1;
857 start_threads(&opt);
858 }
859 #endif
860
861 /* The rest are paths */
862 if (!seen_dashdash) {
863 int j;
864 for (j = i; j < argc; j++)
865 verify_filename(prefix, argv[j], j == i);
866 }
867
868 parse_pathspec(&pathspec, 0,
869 PATHSPEC_PREFER_CWD |
870 (opt.max_depth != -1 ? PATHSPEC_MAXDEPTH_VALID : 0),
871 prefix, argv + i);
872 pathspec.max_depth = opt.max_depth;
873 pathspec.recursive = 1;
874
875 if (show_in_pager && (cached || list.nr))
876 die(_("--open-files-in-pager only works on the worktree"));
877
878 if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
879 const char *pager = path_list.items[0].string;
880 int len = strlen(pager);
881
882 if (len > 4 && is_dir_sep(pager[len - 5]))
883 pager += len - 4;
884
885 if (opt.ignore_case && !strcmp("less", pager))
886 string_list_append(&path_list, "-I");
887
888 if (!strcmp("less", pager) || !strcmp("vi", pager)) {
889 struct strbuf buf = STRBUF_INIT;
890 strbuf_addf(&buf, "+/%s%s",
891 strcmp("less", pager) ? "" : "*",
892 opt.pattern_list->pattern);
893 string_list_append(&path_list, buf.buf);
894 strbuf_detach(&buf, NULL);
895 }
896 }
897
898 if (!show_in_pager && !opt.status_only)
899 setup_pager();
900
901 if (!use_index && (untracked || cached))
902 die(_("--cached or --untracked cannot be used with --no-index."));
903
904 if (!use_index || untracked) {
905 int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
906 if (list.nr)
907 die(_("--no-index or --untracked cannot be used with revs."));
908 hit = grep_directory(&opt, &pathspec, use_exclude, use_index);
909 } else if (0 <= opt_exclude) {
910 die(_("--[no-]exclude-standard cannot be used for tracked contents."));
911 } else if (!list.nr) {
912 if (!cached)
913 setup_work_tree();
914
915 hit = grep_cache(&opt, &pathspec, cached);
916 } else {
917 if (cached)
918 die(_("both --cached and trees are given."));
919 hit = grep_objects(&opt, &pathspec, &list);
920 }
921
922 if (num_threads)
923 hit |= wait_all();
924 if (hit && show_in_pager)
925 run_pager(&opt, prefix);
926 free_grep_patterns(&opt);
927 return !hit;
928 }