struct expire_reflog_cb {
FILE *newlog;
- const char *ref;
- struct commit *ref_commit;
+ enum {
+ UE_NORMAL,
+ UE_ALWAYS,
+ UE_HEAD
+ } unreachable_expire_kind;
+ struct commit_list *mark_list;
+ unsigned long mark_limit;
struct cmd_reflog_expire_cb *cmd;
unsigned char last_kept_sha1[20];
};
return 1;
}
-static int unreachable(struct expire_reflog_cb *cb, struct commit *commit, unsigned char *sha1)
+/*
+ * Starting from commits in the cb->mark_list, mark commits that are
+ * reachable from them. Stop the traversal at commits older than
+ * the expire_limit and queue them back, so that the caller can call
+ * us again to restart the traversal with longer expire_limit.
+ */
+static void mark_reachable(struct expire_reflog_cb *cb)
{
- /*
- * We may or may not have the commit yet - if not, look it
- * up using the supplied sha1.
- */
- if (!commit) {
- if (is_null_sha1(sha1))
- return 0;
-
- commit = lookup_commit_reference_gently(sha1, 1);
-
- /* Not a commit -- keep it */
- if (!commit)
- return 0;
- }
-
- /* Reachable from the current ref? Don't prune. */
- if (commit->object.flags & REACHABLE)
- return 0;
- if (in_merge_bases(commit, &cb->ref_commit, 1))
- return 0;
-
- /* We can't reach it - prune it. */
- return 1;
-}
+ struct commit *commit;
+ struct commit_list *pending;
+ unsigned long expire_limit = cb->mark_limit;
+ struct commit_list *leftover = NULL;
-static void mark_reachable(struct commit *commit, unsigned long expire_limit)
-{
- /*
- * We need to compute whether the commit on either side of a reflog
- * entry is reachable from the tip of the ref for all entries.
- * Mark commits that are reachable from the tip down to the
- * time threshold first; we know a commit marked thusly is
- * reachable from the tip without running in_merge_bases()
- * at all.
- */
- struct commit_list *pending = NULL;
+ for (pending = cb->mark_list; pending; pending = pending->next)
+ pending->item->object.flags &= ~REACHABLE;
- commit_list_insert(commit, &pending);
+ pending = cb->mark_list;
while (pending) {
struct commit_list *entry = pending;
struct commit_list *parent;
if (parse_commit(commit))
continue;
commit->object.flags |= REACHABLE;
- if (commit->date < expire_limit)
+ if (commit->date < expire_limit) {
+ commit_list_insert(commit, &leftover);
continue;
+ }
+ commit->object.flags |= REACHABLE;
parent = commit->parents;
while (parent) {
commit = parent->item;
commit_list_insert(commit, &pending);
}
}
+ cb->mark_list = leftover;
+}
+
+static int unreachable(struct expire_reflog_cb *cb, struct commit *commit, unsigned char *sha1)
+{
+ /*
+ * We may or may not have the commit yet - if not, look it
+ * up using the supplied sha1.
+ */
+ if (!commit) {
+ if (is_null_sha1(sha1))
+ return 0;
+
+ commit = lookup_commit_reference_gently(sha1, 1);
+
+ /* Not a commit -- keep it */
+ if (!commit)
+ return 0;
+ }
+
+ /* Reachable from the current ref? Don't prune. */
+ if (commit->object.flags & REACHABLE)
+ return 0;
+
+ if (cb->mark_list && cb->mark_limit) {
+ cb->mark_limit = 0; /* dig down to the root */
+ mark_reachable(cb);
+ }
+
+ return !(commit->object.flags & REACHABLE);
}
static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
goto prune;
if (timestamp < cb->cmd->expire_unreachable) {
- if (!cb->ref_commit)
+ if (cb->unreachable_expire_kind == UE_ALWAYS)
goto prune;
if (unreachable(cb, old, osha1) || unreachable(cb, new, nsha1))
goto prune;
return 0;
}
+static int push_tip_to_list(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
+{
+ struct commit_list **list = cb_data;
+ struct commit *tip_commit;
+ if (flags & REF_ISSYMREF)
+ return 0;
+ tip_commit = lookup_commit_reference_gently(sha1, 1);
+ if (!tip_commit)
+ return 0;
+ commit_list_insert(tip_commit, list);
+ return 0;
+}
+
static int expire_reflog(const char *ref, const unsigned char *sha1, int unused, void *cb_data)
{
struct cmd_reflog_expire_cb *cmd = cb_data;
struct expire_reflog_cb cb;
struct ref_lock *lock;
char *log_file, *newlog_path = NULL;
+ struct commit *tip_commit;
+ struct commit_list *tips;
int status = 0;
memset(&cb, 0, sizeof(cb));
cb.newlog = fopen(newlog_path, "w");
}
- cb.ref_commit = lookup_commit_reference_gently(sha1, 1);
- cb.ref = ref;
cb.cmd = cmd;
- if (cb.ref_commit)
- mark_reachable(cb.ref_commit, cmd->expire_total);
+
+ if (!cmd->expire_unreachable || !strcmp(ref, "HEAD")) {
+ tip_commit = NULL;
+ cb.unreachable_expire_kind = UE_HEAD;
+ } else {
+ tip_commit = lookup_commit_reference_gently(sha1, 1);
+ if (!tip_commit)
+ cb.unreachable_expire_kind = UE_ALWAYS;
+ else
+ cb.unreachable_expire_kind = UE_NORMAL;
+ }
+
+ if (cmd->expire_unreachable <= cmd->expire_total)
+ cb.unreachable_expire_kind = UE_ALWAYS;
+
+ cb.mark_list = NULL;
+ tips = NULL;
+ if (cb.unreachable_expire_kind != UE_ALWAYS) {
+ if (cb.unreachable_expire_kind == UE_HEAD) {
+ struct commit_list *elem;
+ for_each_ref(push_tip_to_list, &tips);
+ for (elem = tips; elem; elem = elem->next)
+ commit_list_insert(elem->item, &cb.mark_list);
+ } else {
+ commit_list_insert(tip_commit, &cb.mark_list);
+ }
+ cb.mark_limit = cmd->expire_total;
+ mark_reachable(&cb);
+ }
+
for_each_reflog_ent(ref, expire_reflog_ent, &cb);
- if (cb.ref_commit)
- clear_commit_marks(cb.ref_commit, REACHABLE);
+
+ if (cb.unreachable_expire_kind != UE_ALWAYS) {
+ if (cb.unreachable_expire_kind == UE_HEAD) {
+ struct commit_list *elem;
+ for (elem = tips; elem; elem = elem->next)
+ clear_commit_marks(tip_commit, REACHABLE);
+ free_commit_list(tips);
+ } else {
+ clear_commit_marks(tip_commit, REACHABLE);
+ }
+ }
finish:
if (cb.newlog) {
if (fclose(cb.newlog)) {
projects / thirdparty / git.git / blobdiff