lockfile.h: extract new header file for the functions in lockfile.c
[git/git.git] / builtin / reflog.c
1 #include "builtin.h"
2 #include "lockfile.h"
3 #include "commit.h"
4 #include "refs.h"
5 #include "dir.h"
6 #include "tree-walk.h"
7 #include "diff.h"
8 #include "revision.h"
9 #include "reachable.h"
10
11 /*
12 * reflog expire
13 */
14
15 static const char reflog_expire_usage[] =
16 "git reflog expire [--verbose] [--dry-run] [--stale-fix] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
17 static const char reflog_delete_usage[] =
18 "git reflog delete [--verbose] [--dry-run] [--rewrite] [--updateref] <refs>...";
19
20 static unsigned long default_reflog_expire;
21 static unsigned long default_reflog_expire_unreachable;
22
23 struct cmd_reflog_expire_cb {
24 struct rev_info revs;
25 int dry_run;
26 int stalefix;
27 int rewrite;
28 int updateref;
29 int verbose;
30 unsigned long expire_total;
31 unsigned long expire_unreachable;
32 int recno;
33 };
34
35 struct expire_reflog_cb {
36 FILE *newlog;
37 enum {
38 UE_NORMAL,
39 UE_ALWAYS,
40 UE_HEAD
41 } unreachable_expire_kind;
42 struct commit_list *mark_list;
43 unsigned long mark_limit;
44 struct cmd_reflog_expire_cb *cmd;
45 unsigned char last_kept_sha1[20];
46 };
47
48 struct collected_reflog {
49 unsigned char sha1[20];
50 char reflog[FLEX_ARRAY];
51 };
52 struct collect_reflog_cb {
53 struct collected_reflog **e;
54 int alloc;
55 int nr;
56 };
57
58 #define INCOMPLETE (1u<<10)
59 #define STUDYING (1u<<11)
60 #define REACHABLE (1u<<12)
61
62 static int tree_is_complete(const unsigned char *sha1)
63 {
64 struct tree_desc desc;
65 struct name_entry entry;
66 int complete;
67 struct tree *tree;
68
69 tree = lookup_tree(sha1);
70 if (!tree)
71 return 0;
72 if (tree->object.flags & SEEN)
73 return 1;
74 if (tree->object.flags & INCOMPLETE)
75 return 0;
76
77 if (!tree->buffer) {
78 enum object_type type;
79 unsigned long size;
80 void *data = read_sha1_file(sha1, &type, &size);
81 if (!data) {
82 tree->object.flags |= INCOMPLETE;
83 return 0;
84 }
85 tree->buffer = data;
86 tree->size = size;
87 }
88 init_tree_desc(&desc, tree->buffer, tree->size);
89 complete = 1;
90 while (tree_entry(&desc, &entry)) {
91 if (!has_sha1_file(entry.sha1) ||
92 (S_ISDIR(entry.mode) && !tree_is_complete(entry.sha1))) {
93 tree->object.flags |= INCOMPLETE;
94 complete = 0;
95 }
96 }
97 free_tree_buffer(tree);
98
99 if (complete)
100 tree->object.flags |= SEEN;
101 return complete;
102 }
103
104 static int commit_is_complete(struct commit *commit)
105 {
106 struct object_array study;
107 struct object_array found;
108 int is_incomplete = 0;
109 int i;
110
111 /* early return */
112 if (commit->object.flags & SEEN)
113 return 1;
114 if (commit->object.flags & INCOMPLETE)
115 return 0;
116 /*
117 * Find all commits that are reachable and are not marked as
118 * SEEN. Then make sure the trees and blobs contained are
119 * complete. After that, mark these commits also as SEEN.
120 * If some of the objects that are needed to complete this
121 * commit are missing, mark this commit as INCOMPLETE.
122 */
123 memset(&study, 0, sizeof(study));
124 memset(&found, 0, sizeof(found));
125 add_object_array(&commit->object, NULL, &study);
126 add_object_array(&commit->object, NULL, &found);
127 commit->object.flags |= STUDYING;
128 while (study.nr) {
129 struct commit *c;
130 struct commit_list *parent;
131
132 c = (struct commit *)study.objects[--study.nr].item;
133 if (!c->object.parsed && !parse_object(c->object.sha1))
134 c->object.flags |= INCOMPLETE;
135
136 if (c->object.flags & INCOMPLETE) {
137 is_incomplete = 1;
138 break;
139 }
140 else if (c->object.flags & SEEN)
141 continue;
142 for (parent = c->parents; parent; parent = parent->next) {
143 struct commit *p = parent->item;
144 if (p->object.flags & STUDYING)
145 continue;
146 p->object.flags |= STUDYING;
147 add_object_array(&p->object, NULL, &study);
148 add_object_array(&p->object, NULL, &found);
149 }
150 }
151 if (!is_incomplete) {
152 /*
153 * make sure all commits in "found" array have all the
154 * necessary objects.
155 */
156 for (i = 0; i < found.nr; i++) {
157 struct commit *c =
158 (struct commit *)found.objects[i].item;
159 if (!tree_is_complete(c->tree->object.sha1)) {
160 is_incomplete = 1;
161 c->object.flags |= INCOMPLETE;
162 }
163 }
164 if (!is_incomplete) {
165 /* mark all found commits as complete, iow SEEN */
166 for (i = 0; i < found.nr; i++)
167 found.objects[i].item->flags |= SEEN;
168 }
169 }
170 /* clear flags from the objects we traversed */
171 for (i = 0; i < found.nr; i++)
172 found.objects[i].item->flags &= ~STUDYING;
173 if (is_incomplete)
174 commit->object.flags |= INCOMPLETE;
175 else {
176 /*
177 * If we come here, we have (1) traversed the ancestry chain
178 * from the "commit" until we reach SEEN commits (which are
179 * known to be complete), and (2) made sure that the commits
180 * encountered during the above traversal refer to trees that
181 * are complete. Which means that we know *all* the commits
182 * we have seen during this process are complete.
183 */
184 for (i = 0; i < found.nr; i++)
185 found.objects[i].item->flags |= SEEN;
186 }
187 /* free object arrays */
188 free(study.objects);
189 free(found.objects);
190 return !is_incomplete;
191 }
192
193 static int keep_entry(struct commit **it, unsigned char *sha1)
194 {
195 struct commit *commit;
196
197 if (is_null_sha1(sha1))
198 return 1;
199 commit = lookup_commit_reference_gently(sha1, 1);
200 if (!commit)
201 return 0;
202
203 /*
204 * Make sure everything in this commit exists.
205 *
206 * We have walked all the objects reachable from the refs
207 * and cache earlier. The commits reachable by this commit
208 * must meet SEEN commits -- and then we should mark them as
209 * SEEN as well.
210 */
211 if (!commit_is_complete(commit))
212 return 0;
213 *it = commit;
214 return 1;
215 }
216
217 /*
218 * Starting from commits in the cb->mark_list, mark commits that are
219 * reachable from them. Stop the traversal at commits older than
220 * the expire_limit and queue them back, so that the caller can call
221 * us again to restart the traversal with longer expire_limit.
222 */
223 static void mark_reachable(struct expire_reflog_cb *cb)
224 {
225 struct commit *commit;
226 struct commit_list *pending;
227 unsigned long expire_limit = cb->mark_limit;
228 struct commit_list *leftover = NULL;
229
230 for (pending = cb->mark_list; pending; pending = pending->next)
231 pending->item->object.flags &= ~REACHABLE;
232
233 pending = cb->mark_list;
234 while (pending) {
235 struct commit_list *entry = pending;
236 struct commit_list *parent;
237 pending = entry->next;
238 commit = entry->item;
239 free(entry);
240 if (commit->object.flags & REACHABLE)
241 continue;
242 if (parse_commit(commit))
243 continue;
244 commit->object.flags |= REACHABLE;
245 if (commit->date < expire_limit) {
246 commit_list_insert(commit, &leftover);
247 continue;
248 }
249 commit->object.flags |= REACHABLE;
250 parent = commit->parents;
251 while (parent) {
252 commit = parent->item;
253 parent = parent->next;
254 if (commit->object.flags & REACHABLE)
255 continue;
256 commit_list_insert(commit, &pending);
257 }
258 }
259 cb->mark_list = leftover;
260 }
261
262 static int unreachable(struct expire_reflog_cb *cb, struct commit *commit, unsigned char *sha1)
263 {
264 /*
265 * We may or may not have the commit yet - if not, look it
266 * up using the supplied sha1.
267 */
268 if (!commit) {
269 if (is_null_sha1(sha1))
270 return 0;
271
272 commit = lookup_commit_reference_gently(sha1, 1);
273
274 /* Not a commit -- keep it */
275 if (!commit)
276 return 0;
277 }
278
279 /* Reachable from the current ref? Don't prune. */
280 if (commit->object.flags & REACHABLE)
281 return 0;
282
283 if (cb->mark_list && cb->mark_limit) {
284 cb->mark_limit = 0; /* dig down to the root */
285 mark_reachable(cb);
286 }
287
288 return !(commit->object.flags & REACHABLE);
289 }
290
291 static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
292 const char *email, unsigned long timestamp, int tz,
293 const char *message, void *cb_data)
294 {
295 struct expire_reflog_cb *cb = cb_data;
296 struct commit *old, *new;
297
298 if (timestamp < cb->cmd->expire_total)
299 goto prune;
300
301 if (cb->cmd->rewrite)
302 osha1 = cb->last_kept_sha1;
303
304 old = new = NULL;
305 if (cb->cmd->stalefix &&
306 (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
307 goto prune;
308
309 if (timestamp < cb->cmd->expire_unreachable) {
310 if (cb->unreachable_expire_kind == UE_ALWAYS)
311 goto prune;
312 if (unreachable(cb, old, osha1) || unreachable(cb, new, nsha1))
313 goto prune;
314 }
315
316 if (cb->cmd->recno && --(cb->cmd->recno) == 0)
317 goto prune;
318
319 if (cb->newlog) {
320 char sign = (tz < 0) ? '-' : '+';
321 int zone = (tz < 0) ? (-tz) : tz;
322 fprintf(cb->newlog, "%s %s %s %lu %c%04d\t%s",
323 sha1_to_hex(osha1), sha1_to_hex(nsha1),
324 email, timestamp, sign, zone,
325 message);
326 hashcpy(cb->last_kept_sha1, nsha1);
327 }
328 if (cb->cmd->verbose)
329 printf("keep %s", message);
330 return 0;
331 prune:
332 if (!cb->newlog)
333 printf("would prune %s", message);
334 else if (cb->cmd->verbose)
335 printf("prune %s", message);
336 return 0;
337 }
338
339 static int push_tip_to_list(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
340 {
341 struct commit_list **list = cb_data;
342 struct commit *tip_commit;
343 if (flags & REF_ISSYMREF)
344 return 0;
345 tip_commit = lookup_commit_reference_gently(sha1, 1);
346 if (!tip_commit)
347 return 0;
348 commit_list_insert(tip_commit, list);
349 return 0;
350 }
351
352 static int expire_reflog(const char *ref, const unsigned char *sha1, int unused, void *cb_data)
353 {
354 struct cmd_reflog_expire_cb *cmd = cb_data;
355 struct expire_reflog_cb cb;
356 struct ref_lock *lock;
357 char *log_file, *newlog_path = NULL;
358 struct commit *tip_commit;
359 struct commit_list *tips;
360 int status = 0;
361
362 memset(&cb, 0, sizeof(cb));
363
364 /*
365 * we take the lock for the ref itself to prevent it from
366 * getting updated.
367 */
368 lock = lock_any_ref_for_update(ref, sha1, 0, NULL);
369 if (!lock)
370 return error("cannot lock ref '%s'", ref);
371 log_file = git_pathdup("logs/%s", ref);
372 if (!reflog_exists(ref))
373 goto finish;
374 if (!cmd->dry_run) {
375 newlog_path = git_pathdup("logs/%s.lock", ref);
376 cb.newlog = fopen(newlog_path, "w");
377 }
378
379 cb.cmd = cmd;
380
381 if (!cmd->expire_unreachable || !strcmp(ref, "HEAD")) {
382 tip_commit = NULL;
383 cb.unreachable_expire_kind = UE_HEAD;
384 } else {
385 tip_commit = lookup_commit_reference_gently(sha1, 1);
386 if (!tip_commit)
387 cb.unreachable_expire_kind = UE_ALWAYS;
388 else
389 cb.unreachable_expire_kind = UE_NORMAL;
390 }
391
392 if (cmd->expire_unreachable <= cmd->expire_total)
393 cb.unreachable_expire_kind = UE_ALWAYS;
394
395 cb.mark_list = NULL;
396 tips = NULL;
397 if (cb.unreachable_expire_kind != UE_ALWAYS) {
398 if (cb.unreachable_expire_kind == UE_HEAD) {
399 struct commit_list *elem;
400 for_each_ref(push_tip_to_list, &tips);
401 for (elem = tips; elem; elem = elem->next)
402 commit_list_insert(elem->item, &cb.mark_list);
403 } else {
404 commit_list_insert(tip_commit, &cb.mark_list);
405 }
406 cb.mark_limit = cmd->expire_total;
407 mark_reachable(&cb);
408 }
409
410 for_each_reflog_ent(ref, expire_reflog_ent, &cb);
411
412 if (cb.unreachable_expire_kind != UE_ALWAYS) {
413 if (cb.unreachable_expire_kind == UE_HEAD) {
414 struct commit_list *elem;
415 for (elem = tips; elem; elem = elem->next)
416 clear_commit_marks(elem->item, REACHABLE);
417 free_commit_list(tips);
418 } else {
419 clear_commit_marks(tip_commit, REACHABLE);
420 }
421 }
422 finish:
423 if (cb.newlog) {
424 if (fclose(cb.newlog)) {
425 status |= error("%s: %s", strerror(errno),
426 newlog_path);
427 unlink(newlog_path);
428 } else if (cmd->updateref &&
429 (write_in_full(lock->lock_fd,
430 sha1_to_hex(cb.last_kept_sha1), 40) != 40 ||
431 write_str_in_full(lock->lock_fd, "\n") != 1 ||
432 close_ref(lock) < 0)) {
433 status |= error("Couldn't write %s",
434 lock->lk->filename.buf);
435 unlink(newlog_path);
436 } else if (rename(newlog_path, log_file)) {
437 status |= error("cannot rename %s to %s",
438 newlog_path, log_file);
439 unlink(newlog_path);
440 } else if (cmd->updateref && commit_ref(lock)) {
441 status |= error("Couldn't set %s", lock->ref_name);
442 } else {
443 adjust_shared_perm(log_file);
444 }
445 }
446 free(newlog_path);
447 free(log_file);
448 unlock_ref(lock);
449 return status;
450 }
451
452 static int collect_reflog(const char *ref, const unsigned char *sha1, int unused, void *cb_data)
453 {
454 struct collected_reflog *e;
455 struct collect_reflog_cb *cb = cb_data;
456 size_t namelen = strlen(ref);
457
458 e = xmalloc(sizeof(*e) + namelen + 1);
459 hashcpy(e->sha1, sha1);
460 memcpy(e->reflog, ref, namelen + 1);
461 ALLOC_GROW(cb->e, cb->nr + 1, cb->alloc);
462 cb->e[cb->nr++] = e;
463 return 0;
464 }
465
466 static struct reflog_expire_cfg {
467 struct reflog_expire_cfg *next;
468 unsigned long expire_total;
469 unsigned long expire_unreachable;
470 size_t len;
471 char pattern[FLEX_ARRAY];
472 } *reflog_expire_cfg, **reflog_expire_cfg_tail;
473
474 static struct reflog_expire_cfg *find_cfg_ent(const char *pattern, size_t len)
475 {
476 struct reflog_expire_cfg *ent;
477
478 if (!reflog_expire_cfg_tail)
479 reflog_expire_cfg_tail = &reflog_expire_cfg;
480
481 for (ent = reflog_expire_cfg; ent; ent = ent->next)
482 if (ent->len == len &&
483 !memcmp(ent->pattern, pattern, len))
484 return ent;
485
486 ent = xcalloc(1, (sizeof(*ent) + len));
487 memcpy(ent->pattern, pattern, len);
488 ent->len = len;
489 *reflog_expire_cfg_tail = ent;
490 reflog_expire_cfg_tail = &(ent->next);
491 return ent;
492 }
493
494 static int parse_expire_cfg_value(const char *var, const char *value, unsigned long *expire)
495 {
496 if (!value)
497 return config_error_nonbool(var);
498 if (parse_expiry_date(value, expire))
499 return error(_("%s' for '%s' is not a valid timestamp"),
500 value, var);
501 return 0;
502 }
503
504 /* expiry timer slot */
505 #define EXPIRE_TOTAL 01
506 #define EXPIRE_UNREACH 02
507
508 static int reflog_expire_config(const char *var, const char *value, void *cb)
509 {
510 const char *pattern, *key;
511 int pattern_len;
512 unsigned long expire;
513 int slot;
514 struct reflog_expire_cfg *ent;
515
516 if (parse_config_key(var, "gc", &pattern, &pattern_len, &key) < 0)
517 return git_default_config(var, value, cb);
518
519 if (!strcmp(key, "reflogexpire")) {
520 slot = EXPIRE_TOTAL;
521 if (parse_expire_cfg_value(var, value, &expire))
522 return -1;
523 } else if (!strcmp(key, "reflogexpireunreachable")) {
524 slot = EXPIRE_UNREACH;
525 if (parse_expire_cfg_value(var, value, &expire))
526 return -1;
527 } else
528 return git_default_config(var, value, cb);
529
530 if (!pattern) {
531 switch (slot) {
532 case EXPIRE_TOTAL:
533 default_reflog_expire = expire;
534 break;
535 case EXPIRE_UNREACH:
536 default_reflog_expire_unreachable = expire;
537 break;
538 }
539 return 0;
540 }
541
542 ent = find_cfg_ent(pattern, pattern_len);
543 if (!ent)
544 return -1;
545 switch (slot) {
546 case EXPIRE_TOTAL:
547 ent->expire_total = expire;
548 break;
549 case EXPIRE_UNREACH:
550 ent->expire_unreachable = expire;
551 break;
552 }
553 return 0;
554 }
555
556 static void set_reflog_expiry_param(struct cmd_reflog_expire_cb *cb, int slot, const char *ref)
557 {
558 struct reflog_expire_cfg *ent;
559
560 if (slot == (EXPIRE_TOTAL|EXPIRE_UNREACH))
561 return; /* both given explicitly -- nothing to tweak */
562
563 for (ent = reflog_expire_cfg; ent; ent = ent->next) {
564 if (!wildmatch(ent->pattern, ref, 0, NULL)) {
565 if (!(slot & EXPIRE_TOTAL))
566 cb->expire_total = ent->expire_total;
567 if (!(slot & EXPIRE_UNREACH))
568 cb->expire_unreachable = ent->expire_unreachable;
569 return;
570 }
571 }
572
573 /*
574 * If unconfigured, make stash never expire
575 */
576 if (!strcmp(ref, "refs/stash")) {
577 if (!(slot & EXPIRE_TOTAL))
578 cb->expire_total = 0;
579 if (!(slot & EXPIRE_UNREACH))
580 cb->expire_unreachable = 0;
581 return;
582 }
583
584 /* Nothing matched -- use the default value */
585 if (!(slot & EXPIRE_TOTAL))
586 cb->expire_total = default_reflog_expire;
587 if (!(slot & EXPIRE_UNREACH))
588 cb->expire_unreachable = default_reflog_expire_unreachable;
589 }
590
591 static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
592 {
593 struct cmd_reflog_expire_cb cb;
594 unsigned long now = time(NULL);
595 int i, status, do_all;
596 int explicit_expiry = 0;
597
598 default_reflog_expire_unreachable = now - 30 * 24 * 3600;
599 default_reflog_expire = now - 90 * 24 * 3600;
600 git_config(reflog_expire_config, NULL);
601
602 save_commit_buffer = 0;
603 do_all = status = 0;
604 memset(&cb, 0, sizeof(cb));
605
606 cb.expire_total = default_reflog_expire;
607 cb.expire_unreachable = default_reflog_expire_unreachable;
608
609 for (i = 1; i < argc; i++) {
610 const char *arg = argv[i];
611 if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
612 cb.dry_run = 1;
613 else if (starts_with(arg, "--expire=")) {
614 if (parse_expiry_date(arg + 9, &cb.expire_total))
615 die(_("'%s' is not a valid timestamp"), arg);
616 explicit_expiry |= EXPIRE_TOTAL;
617 }
618 else if (starts_with(arg, "--expire-unreachable=")) {
619 if (parse_expiry_date(arg + 21, &cb.expire_unreachable))
620 die(_("'%s' is not a valid timestamp"), arg);
621 explicit_expiry |= EXPIRE_UNREACH;
622 }
623 else if (!strcmp(arg, "--stale-fix"))
624 cb.stalefix = 1;
625 else if (!strcmp(arg, "--rewrite"))
626 cb.rewrite = 1;
627 else if (!strcmp(arg, "--updateref"))
628 cb.updateref = 1;
629 else if (!strcmp(arg, "--all"))
630 do_all = 1;
631 else if (!strcmp(arg, "--verbose"))
632 cb.verbose = 1;
633 else if (!strcmp(arg, "--")) {
634 i++;
635 break;
636 }
637 else if (arg[0] == '-')
638 usage(reflog_expire_usage);
639 else
640 break;
641 }
642
643 /*
644 * We can trust the commits and objects reachable from refs
645 * even in older repository. We cannot trust what's reachable
646 * from reflog if the repository was pruned with older git.
647 */
648 if (cb.stalefix) {
649 init_revisions(&cb.revs, prefix);
650 if (cb.verbose)
651 printf("Marking reachable objects...");
652 mark_reachable_objects(&cb.revs, 0, NULL);
653 if (cb.verbose)
654 putchar('\n');
655 }
656
657 if (do_all) {
658 struct collect_reflog_cb collected;
659 int i;
660
661 memset(&collected, 0, sizeof(collected));
662 for_each_reflog(collect_reflog, &collected);
663 for (i = 0; i < collected.nr; i++) {
664 struct collected_reflog *e = collected.e[i];
665 set_reflog_expiry_param(&cb, explicit_expiry, e->reflog);
666 status |= expire_reflog(e->reflog, e->sha1, 0, &cb);
667 free(e);
668 }
669 free(collected.e);
670 }
671
672 for (; i < argc; i++) {
673 char *ref;
674 unsigned char sha1[20];
675 if (!dwim_log(argv[i], strlen(argv[i]), sha1, &ref)) {
676 status |= error("%s points nowhere!", argv[i]);
677 continue;
678 }
679 set_reflog_expiry_param(&cb, explicit_expiry, ref);
680 status |= expire_reflog(ref, sha1, 0, &cb);
681 }
682 return status;
683 }
684
685 static int count_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
686 const char *email, unsigned long timestamp, int tz,
687 const char *message, void *cb_data)
688 {
689 struct cmd_reflog_expire_cb *cb = cb_data;
690 if (!cb->expire_total || timestamp < cb->expire_total)
691 cb->recno++;
692 return 0;
693 }
694
695 static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
696 {
697 struct cmd_reflog_expire_cb cb;
698 int i, status = 0;
699
700 memset(&cb, 0, sizeof(cb));
701
702 for (i = 1; i < argc; i++) {
703 const char *arg = argv[i];
704 if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
705 cb.dry_run = 1;
706 else if (!strcmp(arg, "--rewrite"))
707 cb.rewrite = 1;
708 else if (!strcmp(arg, "--updateref"))
709 cb.updateref = 1;
710 else if (!strcmp(arg, "--verbose"))
711 cb.verbose = 1;
712 else if (!strcmp(arg, "--")) {
713 i++;
714 break;
715 }
716 else if (arg[0] == '-')
717 usage(reflog_delete_usage);
718 else
719 break;
720 }
721
722 if (argc - i < 1)
723 return error("Nothing to delete?");
724
725 for ( ; i < argc; i++) {
726 const char *spec = strstr(argv[i], "@{");
727 unsigned char sha1[20];
728 char *ep, *ref;
729 int recno;
730
731 if (!spec) {
732 status |= error("Not a reflog: %s", argv[i]);
733 continue;
734 }
735
736 if (!dwim_log(argv[i], spec - argv[i], sha1, &ref)) {
737 status |= error("no reflog for '%s'", argv[i]);
738 continue;
739 }
740
741 recno = strtoul(spec + 2, &ep, 10);
742 if (*ep == '}') {
743 cb.recno = -recno;
744 for_each_reflog_ent(ref, count_reflog_ent, &cb);
745 } else {
746 cb.expire_total = approxidate(spec + 2);
747 for_each_reflog_ent(ref, count_reflog_ent, &cb);
748 cb.expire_total = 0;
749 }
750
751 status |= expire_reflog(ref, sha1, 0, &cb);
752 free(ref);
753 }
754 return status;
755 }
756
757 /*
758 * main "reflog"
759 */
760
761 static const char reflog_usage[] =
762 "git reflog [ show | expire | delete ]";
763
764 int cmd_reflog(int argc, const char **argv, const char *prefix)
765 {
766 if (argc > 1 && !strcmp(argv[1], "-h"))
767 usage(reflog_usage);
768
769 /* With no command, we default to showing it. */
770 if (argc < 2 || *argv[1] == '-')
771 return cmd_log_reflog(argc, argv, prefix);
772
773 if (!strcmp(argv[1], "show"))
774 return cmd_log_reflog(argc - 1, argv + 1, prefix);
775
776 if (!strcmp(argv[1], "expire"))
777 return cmd_reflog_expire(argc - 1, argv + 1, prefix);
778
779 if (!strcmp(argv[1], "delete"))
780 return cmd_reflog_delete(argc - 1, argv + 1, prefix);
781
782 return cmd_log_reflog(argc, argv, prefix);
783 }