freshlybakedca.ke
Git fork
1#define USE_THE_REPOSITORY_VARIABLE
2#define DISABLE_SIGN_COMPARE_WARNINGS
3
4#include "builtin.h"
5#include "config.h"
6#include "environment.h"
7#include "gettext.h"
8#include "hex.h"
9#include "lockfile.h"
10#include "commit.h"
11#include "tag.h"
12#include "refs.h"
13#include "object-name.h"
14#include "parse-options.h"
15#include "read-cache-ll.h"
16#include "revision.h"
17#include "diff.h"
18#include "hashmap.h"
19#include "setup.h"
20#include "strvec.h"
21#include "run-command.h"
22#include "odb.h"
23#include "list-objects.h"
24#include "commit-slab.h"
25#include "wildmatch.h"
26#include "prio-queue.h"
27#include "oidset.h"
28
29#define MAX_TAGS (FLAG_BITS - 1)
30#define DEFAULT_CANDIDATES 10
31
32define_commit_slab(commit_names, struct commit_name *);
33
34static const char * const describe_usage[] = {
35 N_("git describe [--all] [--tags] [--contains] [--abbrev=<n>] [<commit-ish>...]"),
36 N_("git describe [--all] [--tags] [--contains] [--abbrev=<n>] --dirty[=<mark>]"),
37 N_("git describe <blob>"),
38 NULL
39};
40
41static int debug; /* Display lots of verbose info */
42static int all; /* Any valid ref can be used */
43static int tags; /* Allow lightweight tags */
44static int longformat;
45static int first_parent;
46static int abbrev = -1; /* unspecified */
47static int max_candidates = DEFAULT_CANDIDATES;
48static struct hashmap names;
49static int have_util;
50static struct string_list patterns = STRING_LIST_INIT_NODUP;
51static struct string_list exclude_patterns = STRING_LIST_INIT_NODUP;
52static int always;
53static const char *suffix, *dirty, *broken;
54static struct commit_names commit_names;
55
56/* diff-index command arguments to check if working tree is dirty. */
57static const char *diff_index_args[] = {
58 "diff-index", "--quiet", "HEAD", "--", NULL
59};
60
61static const char *update_index_args[] = {
62 "update-index", "--unmerged", "-q", "--refresh", NULL
63};
64
65struct commit_name {
66 struct hashmap_entry entry;
67 struct object_id peeled;
68 struct tag *tag;
69 unsigned prio:2; /* annotated tag = 2, tag = 1, head = 0 */
70 unsigned name_checked:1;
71 unsigned misnamed:1;
72 struct object_id oid;
73 char *path;
74};
75
76static const char *prio_names[] = {
77 N_("head"), N_("lightweight"), N_("annotated"),
78};
79
80static int commit_name_neq(const void *cmp_data UNUSED,
81 const struct hashmap_entry *eptr,
82 const struct hashmap_entry *entry_or_key,
83 const void *peeled)
84{
85 const struct commit_name *cn1, *cn2;
86
87 cn1 = container_of(eptr, const struct commit_name, entry);
88 cn2 = container_of(entry_or_key, const struct commit_name, entry);
89
90 return !oideq(&cn1->peeled, peeled ? peeled : &cn2->peeled);
91}
92
93static inline struct commit_name *find_commit_name(const struct object_id *peeled)
94{
95 return hashmap_get_entry_from_hash(&names, oidhash(peeled), peeled,
96 struct commit_name, entry);
97}
98
99static int replace_name(struct commit_name *e,
100 int prio,
101 const struct object_id *oid,
102 struct tag **tag)
103{
104 if (!e || e->prio < prio)
105 return 1;
106
107 if (e->prio == 2 && prio == 2) {
108 /* Multiple annotated tags point to the same commit.
109 * Select one to keep based upon their tagger date.
110 */
111 struct tag *t;
112
113 if (!e->tag) {
114 t = lookup_tag(the_repository, &e->oid);
115 if (!t || parse_tag(t))
116 return 1;
117 e->tag = t;
118 }
119
120 t = lookup_tag(the_repository, oid);
121 if (!t || parse_tag(t))
122 return 0;
123 *tag = t;
124
125 if (e->tag->date < t->date)
126 return 1;
127 }
128
129 return 0;
130}
131
132static void add_to_known_names(const char *path,
133 const struct object_id *peeled,
134 int prio,
135 const struct object_id *oid)
136{
137 struct commit_name *e = find_commit_name(peeled);
138 struct tag *tag = NULL;
139 if (replace_name(e, prio, oid, &tag)) {
140 if (!e) {
141 e = xmalloc(sizeof(struct commit_name));
142 oidcpy(&e->peeled, peeled);
143 hashmap_entry_init(&e->entry, oidhash(peeled));
144 hashmap_add(&names, &e->entry);
145 e->path = NULL;
146 }
147 e->tag = tag;
148 e->prio = prio;
149 e->name_checked = 0;
150 e->misnamed = 0;
151 oidcpy(&e->oid, oid);
152 free(e->path);
153 e->path = xstrdup(path);
154 }
155}
156
157static int get_name(const char *path, const char *referent UNUSED, const struct object_id *oid,
158 int flag UNUSED, void *cb_data UNUSED)
159{
160 int is_tag = 0;
161 struct object_id peeled;
162 int is_annotated, prio;
163 const char *path_to_match = NULL;
164
165 if (skip_prefix(path, "refs/tags/", &path_to_match)) {
166 is_tag = 1;
167 } else if (all) {
168 if ((exclude_patterns.nr || patterns.nr) &&
169 !skip_prefix(path, "refs/heads/", &path_to_match) &&
170 !skip_prefix(path, "refs/remotes/", &path_to_match)) {
171 /* Only accept reference of known type if there are match/exclude patterns */
172 return 0;
173 }
174 } else {
175 /* Reject anything outside refs/tags/ unless --all */
176 return 0;
177 }
178
179 /*
180 * If we're given exclude patterns, first exclude any tag which match
181 * any of the exclude pattern.
182 */
183 if (exclude_patterns.nr) {
184 struct string_list_item *item;
185
186 for_each_string_list_item(item, &exclude_patterns) {
187 if (!wildmatch(item->string, path_to_match, 0))
188 return 0;
189 }
190 }
191
192 /*
193 * If we're given patterns, accept only tags which match at least one
194 * pattern.
195 */
196 if (patterns.nr) {
197 int found = 0;
198 struct string_list_item *item;
199
200 for_each_string_list_item(item, &patterns) {
201 if (!wildmatch(item->string, path_to_match, 0)) {
202 found = 1;
203 break;
204 }
205 }
206
207 if (!found)
208 return 0;
209 }
210
211 /* Is it annotated? */
212 if (!peel_iterated_oid(the_repository, oid, &peeled)) {
213 is_annotated = !oideq(oid, &peeled);
214 } else {
215 oidcpy(&peeled, oid);
216 is_annotated = 0;
217 }
218
219 /*
220 * By default, we only use annotated tags, but with --tags
221 * we fall back to lightweight ones (even without --tags,
222 * we still remember lightweight ones, only to give hints
223 * in an error message). --all allows any refs to be used.
224 */
225 if (is_annotated)
226 prio = 2;
227 else if (is_tag)
228 prio = 1;
229 else
230 prio = 0;
231
232 add_to_known_names(all ? path + 5 : path + 10, &peeled, prio, oid);
233 return 0;
234}
235
236struct possible_tag {
237 struct commit_name *name;
238 int depth;
239 int found_order;
240 unsigned flag_within;
241};
242
243static int compare_pt(const void *a_, const void *b_)
244{
245 struct possible_tag *a = (struct possible_tag *)a_;
246 struct possible_tag *b = (struct possible_tag *)b_;
247 if (a->depth != b->depth)
248 return a->depth - b->depth;
249 if (a->found_order != b->found_order)
250 return a->found_order - b->found_order;
251 return 0;
252}
253
254struct lazy_queue {
255 struct prio_queue queue;
256 bool get_pending;
257};
258
259#define LAZY_QUEUE_INIT { { compare_commits_by_commit_date }, false }
260
261static void *lazy_queue_get(struct lazy_queue *queue)
262{
263 if (queue->get_pending)
264 prio_queue_get(&queue->queue);
265 else
266 queue->get_pending = true;
267 return prio_queue_peek(&queue->queue);
268}
269
270static void lazy_queue_put(struct lazy_queue *queue, void *thing)
271{
272 if (queue->get_pending)
273 prio_queue_replace(&queue->queue, thing);
274 else
275 prio_queue_put(&queue->queue, thing);
276 queue->get_pending = false;
277}
278
279static bool lazy_queue_empty(const struct lazy_queue *queue)
280{
281 return queue->queue.nr == (queue->get_pending ? 1 : 0);
282}
283
284static void lazy_queue_clear(struct lazy_queue *queue)
285{
286 clear_prio_queue(&queue->queue);
287 queue->get_pending = false;
288}
289
290static unsigned long finish_depth_computation(struct lazy_queue *queue,
291 struct possible_tag *best)
292{
293 unsigned long seen_commits = 0;
294 struct oidset unflagged = OIDSET_INIT;
295
296 for (size_t i = queue->get_pending ? 1 : 0; i < queue->queue.nr; i++) {
297 struct commit *commit = queue->queue.array[i].data;
298 if (!(commit->object.flags & best->flag_within))
299 oidset_insert(&unflagged, &commit->object.oid);
300 }
301
302 while (!lazy_queue_empty(queue)) {
303 struct commit *c = lazy_queue_get(queue);
304 struct commit_list *parents = c->parents;
305 seen_commits++;
306 if (c->object.flags & best->flag_within) {
307 if (!oidset_size(&unflagged))
308 break;
309 } else {
310 oidset_remove(&unflagged, &c->object.oid);
311 best->depth++;
312 }
313 while (parents) {
314 unsigned seen, flag_before, flag_after;
315 struct commit *p = parents->item;
316 repo_parse_commit(the_repository, p);
317 seen = p->object.flags & SEEN;
318 if (!seen)
319 lazy_queue_put(queue, p);
320 flag_before = p->object.flags & best->flag_within;
321 p->object.flags |= c->object.flags;
322 flag_after = p->object.flags & best->flag_within;
323 if (!seen && !flag_after)
324 oidset_insert(&unflagged, &p->object.oid);
325 if (seen && !flag_before && flag_after)
326 oidset_remove(&unflagged, &p->object.oid);
327 parents = parents->next;
328 }
329 }
330 oidset_clear(&unflagged);
331 return seen_commits;
332}
333
334static void append_name(struct commit_name *n, struct strbuf *dst)
335{
336 if (n->prio == 2 && !n->tag) {
337 n->tag = lookup_tag(the_repository, &n->oid);
338 if (!n->tag || parse_tag(n->tag))
339 die(_("annotated tag %s not available"), n->path);
340 }
341 if (n->tag && !n->name_checked) {
342 if (strcmp(n->tag->tag, all ? n->path + 5 : n->path)) {
343 warning(_("tag '%s' is externally known as '%s'"),
344 n->path, n->tag->tag);
345 n->misnamed = 1;
346 }
347 n->name_checked = 1;
348 }
349
350 if (n->tag) {
351 if (all)
352 strbuf_addstr(dst, "tags/");
353 strbuf_addstr(dst, n->tag->tag);
354 } else {
355 strbuf_addstr(dst, n->path);
356 }
357}
358
359static void append_suffix(int depth, const struct object_id *oid, struct strbuf *dst)
360{
361 strbuf_addf(dst, "-%d-g%s", depth,
362 repo_find_unique_abbrev(the_repository, oid, abbrev));
363}
364
365static void describe_commit(struct commit *cmit, struct strbuf *dst)
366{
367 struct commit *gave_up_on = NULL;
368 struct lazy_queue queue = LAZY_QUEUE_INIT;
369 struct commit_name *n;
370 struct possible_tag all_matches[MAX_TAGS];
371 unsigned int match_cnt = 0, annotated_cnt = 0, cur_match;
372 unsigned long seen_commits = 0;
373 unsigned int unannotated_cnt = 0;
374
375 n = find_commit_name(&cmit->object.oid);
376 if (n && (tags || all || n->prio == 2)) {
377 /*
378 * Exact match to an existing ref.
379 */
380 append_name(n, dst);
381 if (n->misnamed || longformat)
382 append_suffix(0, n->tag ? get_tagged_oid(n->tag) : &cmit->object.oid, dst);
383 if (suffix)
384 strbuf_addstr(dst, suffix);
385 return;
386 }
387
388 if (!max_candidates)
389 die(_("no tag exactly matches '%s'"), oid_to_hex(&cmit->object.oid));
390 if (debug)
391 fprintf(stderr, _("No exact match on refs or tags, searching to describe\n"));
392
393 if (!have_util) {
394 struct hashmap_iter iter;
395 struct commit *c;
396 struct commit_name *n;
397
398 init_commit_names(&commit_names);
399 hashmap_for_each_entry(&names, &iter, n,
400 entry /* member name */) {
401 c = lookup_commit_reference_gently(the_repository,
402 &n->peeled, 1);
403 if (c)
404 *commit_names_at(&commit_names, c) = n;
405 }
406 have_util = 1;
407 }
408
409 cmit->object.flags = SEEN;
410 lazy_queue_put(&queue, cmit);
411 while (!lazy_queue_empty(&queue)) {
412 struct commit *c = lazy_queue_get(&queue);
413 struct commit_list *parents = c->parents;
414 struct commit_name **slot;
415
416 seen_commits++;
417
418 if (match_cnt == max_candidates ||
419 match_cnt == hashmap_get_size(&names)) {
420 gave_up_on = c;
421 break;
422 }
423
424 slot = commit_names_peek(&commit_names, c);
425 n = slot ? *slot : NULL;
426 if (n) {
427 if (!tags && !all && n->prio < 2) {
428 unannotated_cnt++;
429 } else if (match_cnt < max_candidates) {
430 struct possible_tag *t = &all_matches[match_cnt++];
431 t->name = n;
432 t->depth = seen_commits - 1;
433 t->flag_within = 1u << match_cnt;
434 t->found_order = match_cnt;
435 c->object.flags |= t->flag_within;
436 if (n->prio == 2)
437 annotated_cnt++;
438 }
439 }
440 for (cur_match = 0; cur_match < match_cnt; cur_match++) {
441 struct possible_tag *t = &all_matches[cur_match];
442 if (!(c->object.flags & t->flag_within))
443 t->depth++;
444 }
445 /* Stop if last remaining path already covered by best candidate(s) */
446 if (annotated_cnt && lazy_queue_empty(&queue)) {
447 int best_depth = INT_MAX;
448 unsigned best_within = 0;
449 for (cur_match = 0; cur_match < match_cnt; cur_match++) {
450 struct possible_tag *t = &all_matches[cur_match];
451 if (t->depth < best_depth) {
452 best_depth = t->depth;
453 best_within = t->flag_within;
454 } else if (t->depth == best_depth) {
455 best_within |= t->flag_within;
456 }
457 }
458 if ((c->object.flags & best_within) == best_within) {
459 if (debug)
460 fprintf(stderr, _("finished search at %s\n"),
461 oid_to_hex(&c->object.oid));
462 break;
463 }
464 }
465 while (parents) {
466 struct commit *p = parents->item;
467 repo_parse_commit(the_repository, p);
468 if (!(p->object.flags & SEEN))
469 lazy_queue_put(&queue, p);
470 p->object.flags |= c->object.flags;
471 parents = parents->next;
472
473 if (first_parent)
474 break;
475 }
476 }
477
478 if (!match_cnt) {
479 struct object_id *cmit_oid = &cmit->object.oid;
480 if (always) {
481 strbuf_add_unique_abbrev(dst, cmit_oid, abbrev);
482 if (suffix)
483 strbuf_addstr(dst, suffix);
484 lazy_queue_clear(&queue);
485 return;
486 }
487 if (unannotated_cnt)
488 die(_("No annotated tags can describe '%s'.\n"
489 "However, there were unannotated tags: try --tags."),
490 oid_to_hex(cmit_oid));
491 else
492 die(_("No tags can describe '%s'.\n"
493 "Try --always, or create some tags."),
494 oid_to_hex(cmit_oid));
495 }
496
497 QSORT(all_matches, match_cnt, compare_pt);
498
499 if (gave_up_on) {
500 lazy_queue_put(&queue, gave_up_on);
501 seen_commits--;
502 }
503 seen_commits += finish_depth_computation(&queue, &all_matches[0]);
504 lazy_queue_clear(&queue);
505
506 if (debug) {
507 static int label_width = -1;
508 if (label_width < 0) {
509 int i, w;
510 for (i = 0; i < ARRAY_SIZE(prio_names); i++) {
511 w = strlen(_(prio_names[i]));
512 if (label_width < w)
513 label_width = w;
514 }
515 }
516 for (cur_match = 0; cur_match < match_cnt; cur_match++) {
517 struct possible_tag *t = &all_matches[cur_match];
518 fprintf(stderr, " %-*s %8d %s\n",
519 label_width, _(prio_names[t->name->prio]),
520 t->depth, t->name->path);
521 }
522 fprintf(stderr, _("traversed %lu commits\n"), seen_commits);
523 if (gave_up_on) {
524 fprintf(stderr,
525 _("found %i tags; gave up search at %s\n"),
526 max_candidates,
527 oid_to_hex(&gave_up_on->object.oid));
528 }
529 }
530
531 append_name(all_matches[0].name, dst);
532 if (all_matches[0].name->misnamed || abbrev)
533 append_suffix(all_matches[0].depth, &cmit->object.oid, dst);
534 if (suffix)
535 strbuf_addstr(dst, suffix);
536}
537
538struct process_commit_data {
539 struct commit *current_commit;
540 const struct object_id *looking_for;
541 struct strbuf *dst;
542 struct rev_info *revs;
543};
544
545static void process_commit(struct commit *commit, void *data)
546{
547 struct process_commit_data *pcd = data;
548 pcd->current_commit = commit;
549}
550
551static void process_object(struct object *obj, const char *path, void *data)
552{
553 struct process_commit_data *pcd = data;
554
555 if (oideq(pcd->looking_for, &obj->oid) && !pcd->dst->len) {
556 reset_revision_walk();
557 if (pcd->current_commit) {
558 describe_commit(pcd->current_commit, pcd->dst);
559 strbuf_addf(pcd->dst, ":%s", path);
560 }
561 free_commit_list(pcd->revs->commits);
562 pcd->revs->commits = NULL;
563 }
564}
565
566static void describe_blob(const struct object_id *oid, struct strbuf *dst)
567{
568 struct rev_info revs;
569 struct strvec args = STRVEC_INIT;
570 struct object_id head_oid;
571 struct process_commit_data pcd = { NULL, oid, dst, &revs};
572
573 if (repo_get_oid(the_repository, "HEAD", &head_oid))
574 die(_("cannot search for blob '%s' on an unborn branch"),
575 oid_to_hex(oid));
576
577 strvec_pushl(&args, "internal: The first arg is not parsed",
578 "--objects", "--in-commit-order", "--reverse",
579 oid_to_hex(&head_oid),
580 NULL);
581
582 repo_init_revisions(the_repository, &revs, NULL);
583 setup_revisions_from_strvec(&args, &revs, NULL);
584 if (args.nr > 1)
585 BUG("setup_revisions could not handle all args?");
586
587 if (prepare_revision_walk(&revs))
588 die("revision walk setup failed");
589
590 traverse_commit_list(&revs, process_commit, process_object, &pcd);
591 reset_revision_walk();
592 release_revisions(&revs);
593 strvec_clear(&args);
594
595 if (!dst->len)
596 die(_("blob '%s' not reachable from HEAD"), oid_to_hex(oid));
597}
598
599static void describe(const char *arg, int last_one)
600{
601 struct object_id oid;
602 struct commit *cmit;
603 struct strbuf sb = STRBUF_INIT;
604
605 if (debug)
606 fprintf(stderr, _("describe %s\n"), arg);
607
608 if (repo_get_oid(the_repository, arg, &oid))
609 die(_("Not a valid object name %s"), arg);
610 cmit = lookup_commit_reference_gently(the_repository, &oid, 1);
611
612 if (cmit)
613 describe_commit(cmit, &sb);
614 else if (odb_read_object_info(the_repository->objects,
615 &oid, NULL) == OBJ_BLOB)
616 describe_blob(&oid, &sb);
617 else
618 die(_("%s is neither a commit nor blob"), arg);
619
620 puts(sb.buf);
621
622 if (!last_one)
623 clear_commit_marks(cmit, -1);
624
625 strbuf_release(&sb);
626}
627
628static int option_parse_exact_match(const struct option *opt, const char *arg,
629 int unset)
630{
631 int *val = opt->value;
632
633 BUG_ON_OPT_ARG(arg);
634
635 *val = unset ? DEFAULT_CANDIDATES : 0;
636 return 0;
637}
638
639int cmd_describe(int argc,
640 const char **argv,
641 const char *prefix,
642 struct repository *repo UNUSED )
643{
644 int contains = 0;
645 struct option options[] = {
646 OPT_BOOL(0, "contains", &contains, N_("find the tag that comes after the commit")),
647 OPT_BOOL(0, "debug", &debug, N_("debug search strategy on stderr")),
648 OPT_BOOL(0, "all", &all, N_("use any ref")),
649 OPT_BOOL(0, "tags", &tags, N_("use any tag, even unannotated")),
650 OPT_BOOL(0, "long", &longformat, N_("always use long format")),
651 OPT_BOOL(0, "first-parent", &first_parent, N_("only follow first parent")),
652 OPT__ABBREV(&abbrev),
653 OPT_CALLBACK_F(0, "exact-match", &max_candidates, NULL,
654 N_("only output exact matches"),
655 PARSE_OPT_NOARG, option_parse_exact_match),
656 OPT_INTEGER(0, "candidates", &max_candidates,
657 N_("consider <n> most recent tags (default: 10)")),
658 OPT_STRING_LIST(0, "match", &patterns, N_("pattern"),
659 N_("only consider tags matching <pattern>")),
660 OPT_STRING_LIST(0, "exclude", &exclude_patterns, N_("pattern"),
661 N_("do not consider tags matching <pattern>")),
662 OPT_BOOL(0, "always", &always,
663 N_("show abbreviated commit object as fallback")),
664 {
665 .type = OPTION_STRING,
666 .long_name = "dirty",
667 .value = &dirty,
668 .argh = N_("mark"),
669 .help = N_("append <mark> on dirty working tree (default: \"-dirty\")"),
670 .flags = PARSE_OPT_OPTARG,
671 .defval = (intptr_t) "-dirty",
672 },
673 {
674 .type = OPTION_STRING,
675 .long_name = "broken",
676 .value = &broken,
677 .argh = N_("mark"),
678 .help = N_("append <mark> on broken working tree (default: \"-broken\")"),
679 .flags = PARSE_OPT_OPTARG,
680 .defval = (intptr_t) "-broken",
681 },
682 OPT_END(),
683 };
684
685 repo_config(the_repository, git_default_config, NULL);
686 argc = parse_options(argc, argv, prefix, options, describe_usage, 0);
687 if (abbrev < 0)
688 abbrev = DEFAULT_ABBREV;
689
690 if (max_candidates < 0)
691 max_candidates = 0;
692 else if (max_candidates > MAX_TAGS)
693 max_candidates = MAX_TAGS;
694
695 save_commit_buffer = 0;
696
697 if (longformat && abbrev == 0)
698 die(_("options '%s' and '%s' cannot be used together"), "--long", "--abbrev=0");
699
700 if (contains) {
701 struct string_list_item *item;
702 struct strvec args;
703 const char **argv_copy;
704 int ret;
705
706 strvec_init(&args);
707 strvec_pushl(&args, "name-rev",
708 "--peel-tag", "--name-only", "--no-undefined",
709 NULL);
710 if (always)
711 strvec_push(&args, "--always");
712 if (!all) {
713 strvec_push(&args, "--tags");
714 for_each_string_list_item(item, &patterns)
715 strvec_pushf(&args, "--refs=refs/tags/%s", item->string);
716 for_each_string_list_item(item, &exclude_patterns)
717 strvec_pushf(&args, "--exclude=refs/tags/%s", item->string);
718 }
719 if (argc)
720 strvec_pushv(&args, argv);
721 else
722 strvec_push(&args, "HEAD");
723
724 /*
725 * `cmd_name_rev()` modifies the array, so we'd leak its
726 * contained strings if we didn't do a copy here.
727 */
728 ALLOC_ARRAY(argv_copy, args.nr + 1);
729 for (size_t i = 0; i < args.nr; i++)
730 argv_copy[i] = args.v[i];
731 argv_copy[args.nr] = NULL;
732
733 ret = cmd_name_rev(args.nr, argv_copy, prefix, the_repository);
734
735 strvec_clear(&args);
736 free(argv_copy);
737 return ret;
738 }
739
740 hashmap_init(&names, commit_name_neq, NULL, 0);
741 refs_for_each_rawref(get_main_ref_store(the_repository), get_name,
742 NULL);
743 if (!hashmap_get_size(&names) && !always)
744 die(_("No names found, cannot describe anything."));
745
746 if (argc == 0) {
747 if (broken) {
748 struct child_process cp = CHILD_PROCESS_INIT;
749
750 strvec_pushv(&cp.args, update_index_args);
751 cp.git_cmd = 1;
752 cp.no_stdin = 1;
753 cp.no_stdout = 1;
754 run_command(&cp);
755
756 child_process_init(&cp);
757 strvec_pushv(&cp.args, diff_index_args);
758 cp.git_cmd = 1;
759 cp.no_stdin = 1;
760 cp.no_stdout = 1;
761
762 if (!dirty)
763 dirty = "-dirty";
764
765 switch (run_command(&cp)) {
766 case 0:
767 suffix = NULL;
768 break;
769 case 1:
770 suffix = dirty;
771 break;
772 default:
773 /* diff-index aborted abnormally */
774 suffix = broken;
775 }
776 } else if (dirty) {
777 struct lock_file index_lock = LOCK_INIT;
778 struct rev_info revs;
779 int fd;
780
781 setup_work_tree();
782 prepare_repo_settings(the_repository);
783 the_repository->settings.command_requires_full_index = 0;
784 repo_read_index(the_repository);
785 refresh_index(the_repository->index, REFRESH_QUIET|REFRESH_UNMERGED,
786 NULL, NULL, NULL);
787 fd = repo_hold_locked_index(the_repository,
788 &index_lock, 0);
789 if (0 <= fd)
790 repo_update_index_if_able(the_repository, &index_lock);
791
792 repo_init_revisions(the_repository, &revs, prefix);
793
794 if (setup_revisions(ARRAY_SIZE(diff_index_args) - 1,
795 diff_index_args, &revs, NULL) != 1)
796 BUG("malformed internal diff-index command line");
797 run_diff_index(&revs, 0);
798
799 if (!diff_result_code(&revs))
800 suffix = NULL;
801 else
802 suffix = dirty;
803 release_revisions(&revs);
804 }
805 describe("HEAD", 1);
806 } else if (dirty) {
807 die(_("option '%s' and commit-ishes cannot be used together"), "--dirty");
808 } else if (broken) {
809 die(_("option '%s' and commit-ishes cannot be used together"), "--broken");
810 } else {
811 while (argc-- > 0)
812 describe(*argv++, argc == 0);
813 }
814 return 0;
815}