15 static const char reflog_expire_usage[] =
16 "git-reflog (show|expire) [--verbose] [--dry-run] [--stale-fix] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
18 static unsigned long default_reflog_expire;
19 static unsigned long default_reflog_expire_unreachable;
21 struct cmd_reflog_expire_cb {
26 unsigned long expire_total;
27 unsigned long expire_unreachable;
31 struct expire_reflog_cb {
34 struct commit *ref_commit;
35 struct cmd_reflog_expire_cb *cmd;
38 struct collected_reflog {
39 unsigned char sha1[20];
40 char reflog[FLEX_ARRAY];
42 struct collect_reflog_cb {
43 struct collected_reflog **e;
48 #define INCOMPLETE (1u<<10)
49 #define STUDYING (1u<<11)
51 static int tree_is_complete(const unsigned char *sha1)
53 struct tree_desc desc;
54 struct name_entry entry;
58 tree = lookup_tree(sha1);
61 if (tree->object.flags & SEEN)
63 if (tree->object.flags & INCOMPLETE)
67 enum object_type type;
69 void *data = read_sha1_file(sha1, &type, &size);
71 tree->object.flags |= INCOMPLETE;
77 init_tree_desc(&desc, tree->buffer, tree->size);
79 while (tree_entry(&desc, &entry)) {
80 if (!has_sha1_file(entry.sha1) ||
81 (S_ISDIR(entry.mode) && !tree_is_complete(entry.sha1))) {
82 tree->object.flags |= INCOMPLETE;
90 tree->object.flags |= SEEN;
94 static int commit_is_complete(struct commit *commit)
96 struct object_array study;
97 struct object_array found;
98 int is_incomplete = 0;
102 if (commit->object.flags & SEEN)
104 if (commit->object.flags & INCOMPLETE)
107 * Find all commits that are reachable and are not marked as
108 * SEEN. Then make sure the trees and blobs contained are
109 * complete. After that, mark these commits also as SEEN.
110 * If some of the objects that are needed to complete this
111 * commit are missing, mark this commit as INCOMPLETE.
113 memset(&study, 0, sizeof(study));
114 memset(&found, 0, sizeof(found));
115 add_object_array(&commit->object, NULL, &study);
116 add_object_array(&commit->object, NULL, &found);
117 commit->object.flags |= STUDYING;
120 struct commit_list *parent;
122 c = (struct commit *)study.objects[--study.nr].item;
123 if (!c->object.parsed && !parse_object(c->object.sha1))
124 c->object.flags |= INCOMPLETE;
126 if (c->object.flags & INCOMPLETE) {
130 else if (c->object.flags & SEEN)
132 for (parent = c->parents; parent; parent = parent->next) {
133 struct commit *p = parent->item;
134 if (p->object.flags & STUDYING)
136 p->object.flags |= STUDYING;
137 add_object_array(&p->object, NULL, &study);
138 add_object_array(&p->object, NULL, &found);
141 if (!is_incomplete) {
143 * make sure all commits in "found" array have all the
146 for (i = 0; i < found.nr; i++) {
148 (struct commit *)found.objects[i].item;
149 if (!tree_is_complete(c->tree->object.sha1)) {
151 c->object.flags |= INCOMPLETE;
154 if (!is_incomplete) {
155 /* mark all found commits as complete, iow SEEN */
156 for (i = 0; i < found.nr; i++)
157 found.objects[i].item->flags |= SEEN;
160 /* clear flags from the objects we traversed */
161 for (i = 0; i < found.nr; i++)
162 found.objects[i].item->flags &= ~STUDYING;
164 commit->object.flags |= INCOMPLETE;
167 * If we come here, we have (1) traversed the ancestry chain
168 * from the "commit" until we reach SEEN commits (which are
169 * known to be complete), and (2) made sure that the commits
170 * encountered during the above traversal refer to trees that
171 * are complete. Which means that we know *all* the commits
172 * we have seen during this process are complete.
174 for (i = 0; i < found.nr; i++)
175 found.objects[i].item->flags |= SEEN;
177 /* free object arrays */
180 return !is_incomplete;
183 static int keep_entry(struct commit **it, unsigned char *sha1)
185 struct commit *commit;
187 if (is_null_sha1(sha1))
189 commit = lookup_commit_reference_gently(sha1, 1);
194 * Make sure everything in this commit exists.
196 * We have walked all the objects reachable from the refs
197 * and cache earlier. The commits reachable by this commit
198 * must meet SEEN commits -- and then we should mark them as
201 if (!commit_is_complete(commit))
207 static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
208 const char *email, unsigned long timestamp, int tz,
209 const char *message, void *cb_data)
211 struct expire_reflog_cb *cb = cb_data;
212 struct commit *old, *new;
214 if (timestamp < cb->cmd->expire_total)
218 if (cb->cmd->stalefix &&
219 (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
222 if (timestamp < cb->cmd->expire_unreachable) {
225 if (!old && !is_null_sha1(osha1))
226 old = lookup_commit_reference_gently(osha1, 1);
227 if (!new && !is_null_sha1(nsha1))
228 new = lookup_commit_reference_gently(nsha1, 1);
229 if ((old && !in_merge_bases(old, &cb->ref_commit, 1)) ||
230 (new && !in_merge_bases(new, &cb->ref_commit, 1)))
234 if (cb->cmd->recno && --(cb->cmd->recno) == 0)
238 char sign = (tz < 0) ? '-' : '+';
239 int zone = (tz < 0) ? (-tz) : tz;
240 fprintf(cb->newlog, "%s %s %s %lu %c%04d\t%s",
241 sha1_to_hex(osha1), sha1_to_hex(nsha1),
242 email, timestamp, sign, zone,
245 if (cb->cmd->verbose)
246 printf("keep %s", message);
249 if (!cb->newlog || cb->cmd->verbose)
250 printf("%sprune %s", cb->newlog ? "" : "would ", message);
254 static int expire_reflog(const char *ref, const unsigned char *sha1, int unused, void *cb_data)
256 struct cmd_reflog_expire_cb *cmd = cb_data;
257 struct expire_reflog_cb cb;
258 struct ref_lock *lock;
259 char *log_file, *newlog_path = NULL;
262 memset(&cb, 0, sizeof(cb));
263 /* we take the lock for the ref itself to prevent it from
266 lock = lock_any_ref_for_update(ref, sha1, 0);
268 return error("cannot lock ref '%s'", ref);
269 log_file = xstrdup(git_path("logs/%s", ref));
270 if (!file_exists(log_file))
273 newlog_path = xstrdup(git_path("logs/%s.lock", ref));
274 cb.newlog = fopen(newlog_path, "w");
277 cb.ref_commit = lookup_commit_reference_gently(sha1, 1);
280 for_each_reflog_ent(ref, expire_reflog_ent, &cb);
283 if (fclose(cb.newlog)) {
284 status |= error("%s: %s", strerror(errno),
287 } else if (rename(newlog_path, log_file)) {
288 status |= error("cannot rename %s to %s",
289 newlog_path, log_file);
299 static int collect_reflog(const char *ref, const unsigned char *sha1, int unused, void *cb_data)
301 struct collected_reflog *e;
302 struct collect_reflog_cb *cb = cb_data;
303 size_t namelen = strlen(ref);
305 e = xmalloc(sizeof(*e) + namelen + 1);
306 hashcpy(e->sha1, sha1);
307 memcpy(e->reflog, ref, namelen + 1);
308 ALLOC_GROW(cb->e, cb->nr + 1, cb->alloc);
313 static int reflog_expire_config(const char *var, const char *value)
315 if (!strcmp(var, "gc.reflogexpire")) {
317 config_error_nonbool(var);
318 default_reflog_expire = approxidate(value);
321 if (!strcmp(var, "gc.reflogexpireunreachable")) {
323 config_error_nonbool(var);
324 default_reflog_expire_unreachable = approxidate(value);
327 return git_default_config(var, value);
330 static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
332 struct cmd_reflog_expire_cb cb;
333 unsigned long now = time(NULL);
334 int i, status, do_all;
336 git_config(reflog_expire_config);
338 save_commit_buffer = 0;
340 memset(&cb, 0, sizeof(cb));
342 if (!default_reflog_expire_unreachable)
343 default_reflog_expire_unreachable = now - 30 * 24 * 3600;
344 if (!default_reflog_expire)
345 default_reflog_expire = now - 90 * 24 * 3600;
346 cb.expire_total = default_reflog_expire;
347 cb.expire_unreachable = default_reflog_expire_unreachable;
350 * We can trust the commits and objects reachable from refs
351 * even in older repository. We cannot trust what's reachable
352 * from reflog if the repository was pruned with older git.
355 for (i = 1; i < argc; i++) {
356 const char *arg = argv[i];
357 if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
359 else if (!prefixcmp(arg, "--expire="))
360 cb.expire_total = approxidate(arg + 9);
361 else if (!prefixcmp(arg, "--expire-unreachable="))
362 cb.expire_unreachable = approxidate(arg + 21);
363 else if (!strcmp(arg, "--stale-fix"))
365 else if (!strcmp(arg, "--all"))
367 else if (!strcmp(arg, "--verbose"))
369 else if (!strcmp(arg, "--")) {
373 else if (arg[0] == '-')
374 usage(reflog_expire_usage);
379 init_revisions(&cb.revs, prefix);
381 printf("Marking reachable objects...");
382 mark_reachable_objects(&cb.revs, 0);
388 struct collect_reflog_cb collected;
391 memset(&collected, 0, sizeof(collected));
392 for_each_reflog(collect_reflog, &collected);
393 for (i = 0; i < collected.nr; i++) {
394 struct collected_reflog *e = collected.e[i];
395 status |= expire_reflog(e->reflog, e->sha1, 0, &cb);
402 const char *ref = argv[i++];
403 unsigned char sha1[20];
404 if (!resolve_ref(ref, sha1, 1, NULL)) {
405 status |= error("%s points nowhere!", ref);
408 status |= expire_reflog(ref, sha1, 0, &cb);
413 static int count_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
414 const char *email, unsigned long timestamp, int tz,
415 const char *message, void *cb_data)
417 struct cmd_reflog_expire_cb *cb = cb_data;
418 if (!cb->expire_total || timestamp < cb->expire_total)
423 static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
425 struct cmd_reflog_expire_cb cb;
429 return error("Nothing to delete?");
431 memset(&cb, 0, sizeof(cb));
433 for (i = 1; i < argc; i++) {
434 const char *spec = strstr(argv[i], "@{");
435 unsigned char sha1[20];
440 status |= error("Not a reflog: %s", argv[i]);
444 if (!dwim_ref(argv[i], spec - argv[i], sha1, &ref)) {
445 status |= error("%s points nowhere!", argv[i]);
449 recno = strtoul(spec + 2, &ep, 10);
452 for_each_reflog_ent(ref, count_reflog_ent, &cb);
454 cb.expire_total = approxidate(spec + 2);
455 for_each_reflog_ent(ref, count_reflog_ent, &cb);
459 status |= expire_reflog(ref, sha1, 0, &cb);
469 static const char reflog_usage[] =
470 "git-reflog (expire | ...)";
472 int cmd_reflog(int argc, const char **argv, const char *prefix)
474 /* With no command, we default to showing it. */
475 if (argc < 2 || *argv[1] == '-')
476 return cmd_log_reflog(argc, argv, prefix);
478 if (!strcmp(argv[1], "show"))
479 return cmd_log_reflog(argc - 1, argv + 1, prefix);
481 if (!strcmp(argv[1], "expire"))
482 return cmd_reflog_expire(argc - 1, argv + 1, prefix);
484 if (!strcmp(argv[1], "delete"))
485 return cmd_reflog_delete(argc - 1, argv + 1, prefix);
487 /* Not a recognized reflog command..*/