builtin/describe.c: describe a blob
[git/git.git] / builtin / describe.c
CommitLineData
908e5310 1#include "cache.h"
b2141fc1 2#include "config.h"
697cc8ef 3#include "lockfile.h"
908e5310 4#include "commit.h"
635d4134 5#include "tag.h"
644eb60b 6#include "blob.h"
908e5310 7#include "refs.h"
9a0eaf83 8#include "builtin.h"
23615708 9#include "exec_cmd.h"
166185be 10#include "parse-options.h"
9f67d2e8 11#include "diff.h"
29d8a834 12#include "hashmap.h"
45bc950b 13#include "argv-array.h"
b0176ce6 14#include "run-command.h"
644eb60b
SB
15#include "revision.h"
16#include "list-objects.h"
908e5310 17
8713ab30
SP
18#define MAX_TAGS (FLAG_BITS - 1)
19
166185be 20static const char * const describe_usage[] = {
9c9b4f2f
AH
21 N_("git describe [<options>] [<commit-ish>...]"),
22 N_("git describe [<options>] --dirty"),
166185be
PH
23 NULL
24};
908e5310 25
8713ab30 26static int debug; /* Display lots of verbose info */
7e425c4f
SP
27static int all; /* Any valid ref can be used */
28static int tags; /* Allow lightweight tags */
518120e3 29static int longformat;
e00dd1e9 30static int first_parent;
dce96489 31static int abbrev = -1; /* unspecified */
8713ab30 32static int max_candidates = 10;
29d8a834 33static struct hashmap names;
d1645d02 34static int have_util;
43f8080e 35static struct string_list patterns = STRING_LIST_INIT_NODUP;
77d21f29 36static struct string_list exclude_patterns = STRING_LIST_INIT_NODUP;
da2478db 37static int always;
b0176ce6 38static const char *suffix, *dirty, *broken;
9f67d2e8
JP
39
40/* diff-index command arguments to check if working tree is dirty. */
41static const char *diff_index_args[] = {
42 "diff-index", "--quiet", "HEAD", "--", NULL
43};
44
e7eb5034 45struct commit_name {
29d8a834 46 struct hashmap_entry entry;
6439b5d9 47 struct object_id peeled;
212945d4 48 struct tag *tag;
03e8b541
SP
49 unsigned prio:2; /* annotated tag = 2, tag = 1, head = 0 */
50 unsigned name_checked:1;
6439b5d9 51 struct object_id oid;
219a0f33 52 char *path;
e7eb5034 53};
c4472643 54
cf69fd49 55static const char *prio_names[] = {
646c3bd1 56 N_("head"), N_("lightweight"), N_("annotated"),
cf69fd49 57};
908e5310 58
7663cdc8 59static int commit_name_cmp(const void *unused_cmp_data,
0068cede
SB
60 const void *entry,
61 const void *entry_or_key,
7663cdc8 62 const void *peeled)
29d8a834 63{
0068cede
SB
64 const struct commit_name *cn1 = entry;
65 const struct commit_name *cn2 = entry_or_key;
66
6439b5d9 67 return oidcmp(&cn1->peeled, peeled ? peeled : &cn2->peeled);
29d8a834
KB
68}
69
6439b5d9 70static inline struct commit_name *find_commit_name(const struct object_id *peeled)
3cfa4db3 71{
6439b5d9 72 return hashmap_get_from_hash(&names, sha1hash(peeled->hash), peeled->hash);
d1645d02
AK
73}
74
03e8b541
SP
75static int replace_name(struct commit_name *e,
76 int prio,
6439b5d9 77 const struct object_id *oid,
03e8b541
SP
78 struct tag **tag)
79{
80 if (!e || e->prio < prio)
81 return 1;
82
83 if (e->prio == 2 && prio == 2) {
84 /* Multiple annotated tags point to the same commit.
85 * Select one to keep based upon their tagger date.
86 */
87 struct tag *t;
88
89 if (!e->tag) {
d3101b53 90 t = lookup_tag(&e->oid);
03e8b541
SP
91 if (!t || parse_tag(t))
92 return 1;
93 e->tag = t;
94 }
95
d3101b53 96 t = lookup_tag(oid);
03e8b541
SP
97 if (!t || parse_tag(t))
98 return 0;
99 *tag = t;
100
101 if (e->tag->date < t->date)
102 return 1;
103 }
104
105 return 0;
106}
107
64deb858 108static void add_to_known_names(const char *path,
6439b5d9 109 const struct object_id *peeled,
212945d4 110 int prio,
6439b5d9 111 const struct object_id *oid)
908e5310 112{
3cfa4db3 113 struct commit_name *e = find_commit_name(peeled);
03e8b541 114 struct tag *tag = NULL;
6439b5d9 115 if (replace_name(e, prio, oid, &tag)) {
1e1ade18
AK
116 if (!e) {
117 e = xmalloc(sizeof(struct commit_name));
6439b5d9 118 oidcpy(&e->peeled, peeled);
119 hashmap_entry_init(e, sha1hash(peeled->hash));
29d8a834 120 hashmap_add(&names, e);
219a0f33 121 e->path = NULL;
1e1ade18 122 }
03e8b541 123 e->tag = tag;
e7eb5034 124 e->prio = prio;
03e8b541 125 e->name_checked = 0;
6439b5d9 126 oidcpy(&e->oid, oid);
219a0f33
MH
127 free(e->path);
128 e->path = xstrdup(path);
908e5310 129 }
908e5310
LT
130}
131
99a2cfbf 132static int get_name(const char *path, const struct object_id *oid, int flag, void *cb_data)
908e5310 133{
6d68b2ab 134 int is_tag = 0;
99a2cfbf 135 struct object_id peeled;
46e1d6eb 136 int is_annotated, prio;
6d68b2ab
MK
137 const char *path_to_match = NULL;
138
139 if (skip_prefix(path, "refs/tags/", &path_to_match)) {
140 is_tag = 1;
141 } else if (all) {
142 if ((exclude_patterns.nr || patterns.nr) &&
143 !skip_prefix(path, "refs/heads/", &path_to_match) &&
144 !skip_prefix(path, "refs/remotes/", &path_to_match)) {
145 /* Only accept reference of known type if there are match/exclude patterns */
146 return 0;
147 }
148 } else {
149 /* Reject anything outside refs/tags/ unless --all */
8a5a1884 150 return 0;
6d68b2ab 151 }
8a5a1884 152
77d21f29
JK
153 /*
154 * If we're given exclude patterns, first exclude any tag which match
155 * any of the exclude pattern.
156 */
157 if (exclude_patterns.nr) {
158 struct string_list_item *item;
159
77d21f29 160 for_each_string_list_item(item, &exclude_patterns) {
6d68b2ab 161 if (!wildmatch(item->string, path_to_match, 0))
77d21f29
JK
162 return 0;
163 }
164 }
165
43f8080e
JK
166 /*
167 * If we're given patterns, accept only tags which match at least one
168 * pattern.
169 */
170 if (patterns.nr) {
da769d29 171 int found = 0;
43f8080e
JK
172 struct string_list_item *item;
173
43f8080e 174 for_each_string_list_item(item, &patterns) {
6d68b2ab 175 if (!wildmatch(item->string, path_to_match, 0)) {
da769d29 176 found = 1;
43f8080e 177 break;
da769d29
MK
178 }
179 }
43f8080e 180
da769d29 181 if (!found)
43f8080e 182 return 0;
43f8080e 183 }
46e1d6eb
JH
184
185 /* Is it annotated? */
99a2cfbf
MH
186 if (!peel_ref(path, peeled.hash)) {
187 is_annotated = !!oidcmp(oid, &peeled);
feededd0 188 } else {
99a2cfbf 189 oidcpy(&peeled, oid);
46e1d6eb 190 is_annotated = 0;
feededd0 191 }
64deb858 192
46e1d6eb
JH
193 /*
194 * By default, we only use annotated tags, but with --tags
195 * we fall back to lightweight ones (even without --tags,
196 * we still remember lightweight ones, only to give hints
197 * in an error message). --all allows any refs to be used.
2d9e7c9f 198 */
46e1d6eb
JH
199 if (is_annotated)
200 prio = 2;
201 else if (is_tag)
202 prio = 1;
64deb858
JH
203 else
204 prio = 0;
205
6439b5d9 206 add_to_known_names(all ? path + 5 : path + 10, &peeled, prio, oid);
908e5310
LT
207 return 0;
208}
209
80dbae03 210struct possible_tag {
80dbae03 211 struct commit_name *name;
cf69fd49
SP
212 int depth;
213 int found_order;
8713ab30 214 unsigned flag_within;
80dbae03
SP
215};
216
cf69fd49
SP
217static int compare_pt(const void *a_, const void *b_)
218{
219 struct possible_tag *a = (struct possible_tag *)a_;
220 struct possible_tag *b = (struct possible_tag *)b_;
cf69fd49
SP
221 if (a->depth != b->depth)
222 return a->depth - b->depth;
223 if (a->found_order != b->found_order)
224 return a->found_order - b->found_order;
225 return 0;
226}
227
1b600e65
SP
228static unsigned long finish_depth_computation(
229 struct commit_list **list,
230 struct possible_tag *best)
231{
232 unsigned long seen_commits = 0;
233 while (*list) {
234 struct commit *c = pop_commit(list);
235 struct commit_list *parents = c->parents;
236 seen_commits++;
237 if (c->object.flags & best->flag_within) {
238 struct commit_list *a = *list;
239 while (a) {
240 struct commit *i = a->item;
241 if (!(i->object.flags & best->flag_within))
242 break;
243 a = a->next;
244 }
245 if (!a)
246 break;
247 } else
248 best->depth++;
249 while (parents) {
250 struct commit *p = parents->item;
251 parse_commit(p);
252 if (!(p->object.flags & SEEN))
47e44ed1 253 commit_list_insert_by_date(p, list);
1b600e65
SP
254 p->object.flags |= c->object.flags;
255 parents = parents->next;
256 }
257 }
258 return seen_commits;
259}
260
4dbc59a4 261static void append_name(struct commit_name *n, struct strbuf *dst)
212945d4
SP
262{
263 if (n->prio == 2 && !n->tag) {
d3101b53 264 n->tag = lookup_tag(&n->oid);
03e8b541 265 if (!n->tag || parse_tag(n->tag))
e41f1cb3 266 die(_("annotated tag %s not available"), n->path);
03e8b541
SP
267 }
268 if (n->tag && !n->name_checked) {
269 if (!n->tag->tag)
e41f1cb3 270 die(_("annotated tag %s has no embedded name"), n->path);
81dc223d 271 if (strcmp(n->tag->tag, all ? n->path + 5 : n->path))
e41f1cb3 272 warning(_("tag '%s' is really '%s' here"), n->tag->tag, n->path);
03e8b541 273 n->name_checked = 1;
212945d4
SP
274 }
275
276 if (n->tag)
4dbc59a4 277 strbuf_addstr(dst, n->tag->tag);
212945d4 278 else
4dbc59a4 279 strbuf_addstr(dst, n->path);
870cf7d6
JH
280}
281
4dbc59a4 282static void append_suffix(int depth, const struct object_id *oid, struct strbuf *dst)
870cf7d6 283{
4dbc59a4 284 strbuf_addf(dst, "-%d-g%s", depth, find_unique_abbrev(oid->hash, abbrev));
212945d4
SP
285}
286
4dbc59a4 287static void describe_commit(struct object_id *oid, struct strbuf *dst)
908e5310 288{
8713ab30 289 struct commit *cmit, *gave_up_on = NULL;
908e5310 290 struct commit_list *list;
908e5310 291 struct commit_name *n;
cf69fd49 292 struct possible_tag all_matches[MAX_TAGS];
8713ab30
SP
293 unsigned int match_cnt = 0, annotated_cnt = 0, cur_match;
294 unsigned long seen_commits = 0;
4d23660e 295 unsigned int unannotated_cnt = 0;
908e5310 296
4dbc59a4 297 cmit = lookup_commit_reference(oid);
4c34a2c5 298
6439b5d9 299 n = find_commit_name(&cmit->object.oid);
7a0d61bb 300 if (n && (tags || all || n->prio == 2)) {
870cf7d6
JH
301 /*
302 * Exact match to an existing ref.
303 */
4dbc59a4 304 append_name(n, dst);
870cf7d6 305 if (longformat)
4dbc59a4 306 append_suffix(0, n->tag ? &n->tag->tagged->oid : oid, dst);
b0176ce6 307 if (suffix)
4dbc59a4 308 strbuf_addstr(dst, suffix);
908e5310
LT
309 return;
310 }
311
2c33f757 312 if (!max_candidates)
f2fd0760 313 die(_("no tag exactly matches '%s'"), oid_to_hex(&cmit->object.oid));
8713ab30 314 if (debug)
cdaed0cf 315 fprintf(stderr, _("No exact match on refs or tags, searching to describe\n"));
8713ab30 316
d1645d02 317 if (!have_util) {
29d8a834
KB
318 struct hashmap_iter iter;
319 struct commit *c;
320 struct commit_name *n = hashmap_iter_first(&names, &iter);
321 for (; n; n = hashmap_iter_next(&iter)) {
bc83266a 322 c = lookup_commit_reference_gently(&n->peeled, 1);
29d8a834
KB
323 if (c)
324 c->util = n;
325 }
d1645d02
AK
326 have_util = 1;
327 }
328
908e5310 329 list = NULL;
8713ab30 330 cmit->object.flags = SEEN;
908e5310
LT
331 commit_list_insert(cmit, &list);
332 while (list) {
80dbae03 333 struct commit *c = pop_commit(&list);
dccd0c2a 334 struct commit_list *parents = c->parents;
8713ab30 335 seen_commits++;
e7eb5034 336 n = c->util;
908e5310 337 if (n) {
4d23660e
TR
338 if (!tags && !all && n->prio < 2) {
339 unannotated_cnt++;
340 } else if (match_cnt < max_candidates) {
8713ab30
SP
341 struct possible_tag *t = &all_matches[match_cnt++];
342 t->name = n;
343 t->depth = seen_commits - 1;
344 t->flag_within = 1u << match_cnt;
8a8169c0 345 t->found_order = match_cnt;
8713ab30
SP
346 c->object.flags |= t->flag_within;
347 if (n->prio == 2)
348 annotated_cnt++;
349 }
350 else {
351 gave_up_on = c;
352 break;
353 }
354 }
355 for (cur_match = 0; cur_match < match_cnt; cur_match++) {
356 struct possible_tag *t = &all_matches[cur_match];
357 if (!(c->object.flags & t->flag_within))
358 t->depth++;
359 }
360 if (annotated_cnt && !list) {
361 if (debug)
e41f1cb3 362 fprintf(stderr, _("finished search at %s\n"),
f2fd0760 363 oid_to_hex(&c->object.oid));
8713ab30 364 break;
dccd0c2a
SP
365 }
366 while (parents) {
367 struct commit *p = parents->item;
368 parse_commit(p);
8713ab30 369 if (!(p->object.flags & SEEN))
47e44ed1 370 commit_list_insert_by_date(p, &list);
8713ab30 371 p->object.flags |= c->object.flags;
dccd0c2a 372 parents = parents->next;
e00dd1e9
MC
373
374 if (first_parent)
375 break;
80dbae03
SP
376 }
377 }
378
da2478db 379 if (!match_cnt) {
c87b653c 380 struct object_id *cmit_oid = &cmit->object.oid;
da2478db 381 if (always) {
4dbc59a4 382 strbuf_addstr(dst, find_unique_abbrev(cmit_oid->hash, abbrev));
b0176ce6 383 if (suffix)
4dbc59a4 384 strbuf_addstr(dst, suffix);
da2478db
JH
385 return;
386 }
4d23660e 387 if (unannotated_cnt)
e41f1cb3
ÆAB
388 die(_("No annotated tags can describe '%s'.\n"
389 "However, there were unannotated tags: try --tags."),
c87b653c 390 oid_to_hex(cmit_oid));
4d23660e 391 else
e41f1cb3
ÆAB
392 die(_("No tags can describe '%s'.\n"
393 "Try --always, or create some tags."),
c87b653c 394 oid_to_hex(cmit_oid));
da2478db 395 }
80dbae03 396
9ed0d8d6 397 QSORT(all_matches, match_cnt, compare_pt);
1b600e65
SP
398
399 if (gave_up_on) {
47e44ed1 400 commit_list_insert_by_date(gave_up_on, &list);
1b600e65
SP
401 seen_commits--;
402 }
403 seen_commits += finish_depth_computation(&list, &all_matches[0]);
404 free_commit_list(list);
405
8713ab30 406 if (debug) {
646c3bd1
MG
407 static int label_width = -1;
408 if (label_width < 0) {
409 int i, w;
410 for (i = 0; i < ARRAY_SIZE(prio_names); i++) {
411 w = strlen(_(prio_names[i]));
412 if (label_width < w)
413 label_width = w;
414 }
415 }
8713ab30
SP
416 for (cur_match = 0; cur_match < match_cnt; cur_match++) {
417 struct possible_tag *t = &all_matches[cur_match];
646c3bd1
MG
418 fprintf(stderr, " %-*s %8d %s\n",
419 label_width, _(prio_names[t->name->prio]),
8713ab30
SP
420 t->depth, t->name->path);
421 }
e41f1cb3 422 fprintf(stderr, _("traversed %lu commits\n"), seen_commits);
8713ab30
SP
423 if (gave_up_on) {
424 fprintf(stderr,
e41f1cb3
ÆAB
425 _("more than %i tags found; listed %i most recent\n"
426 "gave up search at %s\n"),
8713ab30 427 max_candidates, max_candidates,
f2fd0760 428 oid_to_hex(&gave_up_on->object.oid));
8713ab30 429 }
80dbae03 430 }
212945d4 431
4dbc59a4 432 append_name(all_matches[0].name, dst);
212945d4 433 if (abbrev)
4dbc59a4 434 append_suffix(all_matches[0].depth, &cmit->object.oid, dst);
b0176ce6 435 if (suffix)
4dbc59a4
SB
436 strbuf_addstr(dst, suffix);
437}
438
644eb60b
SB
439struct process_commit_data {
440 struct object_id current_commit;
441 struct object_id looking_for;
442 struct strbuf *dst;
443 struct rev_info *revs;
444};
445
446static void process_commit(struct commit *commit, void *data)
447{
448 struct process_commit_data *pcd = data;
449 pcd->current_commit = commit->object.oid;
450}
451
452static void process_object(struct object *obj, const char *path, void *data)
453{
454 struct process_commit_data *pcd = data;
455
456 if (!oidcmp(&pcd->looking_for, &obj->oid) && !pcd->dst->len) {
457 reset_revision_walk();
458 describe_commit(&pcd->current_commit, pcd->dst);
459 strbuf_addf(pcd->dst, ":%s", path);
460 free_commit_list(pcd->revs->commits);
461 pcd->revs->commits = NULL;
462 }
463}
464
465static void describe_blob(struct object_id oid, struct strbuf *dst)
466{
467 struct rev_info revs;
468 struct argv_array args = ARGV_ARRAY_INIT;
469 struct process_commit_data pcd = { null_oid, oid, dst, &revs};
470
471 argv_array_pushl(&args, "internal: The first arg is not parsed",
472 "--objects", "--in-commit-order", "--reverse", "HEAD",
473 NULL);
474
475 init_revisions(&revs, NULL);
476 if (setup_revisions(args.argc, args.argv, &revs, NULL) > 1)
477 BUG("setup_revisions could not handle all args?");
478
479 if (prepare_revision_walk(&revs))
480 die("revision walk setup failed");
481
482 traverse_commit_list(&revs, process_commit, process_object, &pcd);
483 reset_revision_walk();
484}
485
4dbc59a4
SB
486static void describe(const char *arg, int last_one)
487{
488 struct object_id oid;
489 struct commit *cmit;
490 struct strbuf sb = STRBUF_INIT;
491
492 if (debug)
493 fprintf(stderr, _("describe %s\n"), arg);
494
495 if (get_oid(arg, &oid))
496 die(_("Not a valid object name %s"), arg);
644eb60b 497 cmit = lookup_commit_reference_gently(&oid, 1);
4dbc59a4 498
644eb60b
SB
499 if (cmit)
500 describe_commit(&oid, &sb);
501 else if (lookup_blob(&oid))
502 describe_blob(oid, &sb);
503 else
504 die(_("%s is neither a commit nor blob"), arg);
4dbc59a4
SB
505
506 puts(sb.buf);
80dbae03 507
8713ab30
SP
508 if (!last_one)
509 clear_commit_marks(cmit, -1);
4dbc59a4
SB
510
511 strbuf_release(&sb);
908e5310
LT
512}
513
9a0eaf83 514int cmd_describe(int argc, const char **argv, const char *prefix)
908e5310 515{
23615708 516 int contains = 0;
166185be 517 struct option options[] = {
d5d09d47
SB
518 OPT_BOOL(0, "contains", &contains, N_("find the tag that comes after the commit")),
519 OPT_BOOL(0, "debug", &debug, N_("debug search strategy on stderr")),
520 OPT_BOOL(0, "all", &all, N_("use any ref")),
521 OPT_BOOL(0, "tags", &tags, N_("use any tag, even unannotated")),
522 OPT_BOOL(0, "long", &longformat, N_("always use long format")),
523 OPT_BOOL(0, "first-parent", &first_parent, N_("only follow first parent")),
166185be 524 OPT__ABBREV(&abbrev),
2c33f757 525 OPT_SET_INT(0, "exact-match", &max_candidates,
bfb0737d 526 N_("only output exact matches"), 0),
166185be 527 OPT_INTEGER(0, "candidates", &max_candidates,
bfb0737d 528 N_("consider <n> most recent tags (default: 10)")),
43f8080e 529 OPT_STRING_LIST(0, "match", &patterns, N_("pattern"),
bfb0737d 530 N_("only consider tags matching <pattern>")),
77d21f29
JK
531 OPT_STRING_LIST(0, "exclude", &exclude_patterns, N_("pattern"),
532 N_("do not consider tags matching <pattern>")),
d5d09d47
SB
533 OPT_BOOL(0, "always", &always,
534 N_("show abbreviated commit object as fallback")),
bfb0737d 535 {OPTION_STRING, 0, "dirty", &dirty, N_("mark"),
d5d09d47
SB
536 N_("append <mark> on dirty working tree (default: \"-dirty\")"),
537 PARSE_OPT_OPTARG, NULL, (intptr_t) "-dirty"},
b0176ce6
SB
538 {OPTION_STRING, 0, "broken", &broken, N_("mark"),
539 N_("append <mark> on broken working tree (default: \"-broken\")"),
540 PARSE_OPT_OPTARG, NULL, (intptr_t) "-broken"},
166185be
PH
541 OPT_END(),
542 };
908e5310 543
dce96489 544 git_config(git_default_config, NULL);
37782920 545 argc = parse_options(argc, argv, prefix, options, describe_usage, 0);
dce96489
LT
546 if (abbrev < 0)
547 abbrev = DEFAULT_ABBREV;
548
2c33f757
SP
549 if (max_candidates < 0)
550 max_candidates = 0;
166185be
PH
551 else if (max_candidates > MAX_TAGS)
552 max_candidates = MAX_TAGS;
4c34a2c5 553
8c599c74 554 save_commit_buffer = 0;
8112894d 555
518120e3 556 if (longformat && abbrev == 0)
e41f1cb3 557 die(_("--long is incompatible with --abbrev=0"));
518120e3 558
23615708 559 if (contains) {
43f8080e 560 struct string_list_item *item;
45bc950b
JH
561 struct argv_array args;
562
563 argv_array_init(&args);
adfc1857
JH
564 argv_array_pushl(&args, "name-rev",
565 "--peel-tag", "--name-only", "--no-undefined",
45bc950b 566 NULL);
da2478db 567 if (always)
45bc950b 568 argv_array_push(&args, "--always");
30ffa603 569 if (!all) {
45bc950b 570 argv_array_push(&args, "--tags");
43f8080e
JK
571 for_each_string_list_item(item, &patterns)
572 argv_array_pushf(&args, "--refs=refs/tags/%s", item->string);
77d21f29
JK
573 for_each_string_list_item(item, &exclude_patterns)
574 argv_array_pushf(&args, "--exclude=refs/tags/%s", item->string);
45bc950b 575 }
2bd07065
SG
576 if (argc)
577 argv_array_pushv(&args, argv);
578 else
579 argv_array_push(&args, "HEAD");
45bc950b 580 return cmd_name_rev(args.argc, args.argv, prefix);
23615708
SP
581 }
582
0068cede 583 hashmap_init(&names, commit_name_cmp, NULL, 0);
99a2cfbf 584 for_each_rawref(get_name, NULL);
8b604d19 585 if (!hashmap_get_size(&names) && !always)
e41f1cb3 586 die(_("No names found, cannot describe anything."));
fb423da0 587
166185be 588 if (argc == 0) {
b0176ce6
SB
589 if (broken) {
590 struct child_process cp = CHILD_PROCESS_INIT;
591 argv_array_pushv(&cp.args, diff_index_args);
592 cp.git_cmd = 1;
593 cp.no_stdin = 1;
594 cp.no_stdout = 1;
595
596 if (!dirty)
597 dirty = "-dirty";
598
599 switch (run_command(&cp)) {
600 case 0:
601 suffix = NULL;
602 break;
603 case 1:
604 suffix = dirty;
605 break;
606 default:
607 /* diff-index aborted abnormally */
608 suffix = broken;
609 }
610 } else if (dirty) {
bb571486
AC
611 static struct lock_file index_lock;
612 int fd;
613
614 read_cache_preload(NULL);
615 refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED,
616 NULL, NULL, NULL);
617 fd = hold_locked_index(&index_lock, 0);
618 if (0 <= fd)
619 update_index_if_able(&the_index, &index_lock);
620
621 if (!cmd_diff_index(ARRAY_SIZE(diff_index_args) - 1,
622 diff_index_args, prefix))
b0176ce6
SB
623 suffix = NULL;
624 else
625 suffix = dirty;
bb571486 626 }
fec9ebf1 627 describe("HEAD", 1);
9f67d2e8 628 } else if (dirty) {
a8a5406a 629 die(_("--dirty is incompatible with commit-ishes"));
b0176ce6
SB
630 } else if (broken) {
631 die(_("--broken is incompatible with commit-ishes"));
166185be 632 } else {
c4472643 633 while (argc-- > 0)
166185be 634 describe(*argv++, argc == 0);
166185be 635 }
908e5310
LT
636 return 0;
637}