#include "refs.h"
#include "dir.h"
#include "tree-walk.h"
+#include "diff.h"
+#include "revision.h"
+#include "reachable.h"
+
+/*
+ * reflog expire
+ */
+
+static const char reflog_expire_usage[] =
+"git-reflog (show|expire) [--verbose] [--dry-run] [--stale-fix] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
static unsigned long default_reflog_expire;
static unsigned long default_reflog_expire_unreachable;
+struct cmd_reflog_expire_cb {
+ struct rev_info revs;
+ int dry_run;
+ int stalefix;
+ int verbose;
+ unsigned long expire_total;
+ unsigned long expire_unreachable;
+};
+
struct expire_reflog_cb {
FILE *newlog;
const char *ref;
struct commit *ref_commit;
- unsigned long expire_total;
- unsigned long expire_unreachable;
+ struct cmd_reflog_expire_cb *cmd;
};
+#define INCOMPLETE (1u<<10)
+#define STUDYING (1u<<11)
+
static int tree_is_complete(const unsigned char *sha1)
{
struct tree_desc desc;
- void *buf;
- char type[20];
+ struct name_entry entry;
+ int complete;
+ struct tree *tree;
- buf = read_sha1_file(sha1, type, &desc.size);
- if (!buf)
+ tree = lookup_tree(sha1);
+ if (!tree)
return 0;
- desc.buf = buf;
- while (desc.size) {
- const unsigned char *elem;
- const char *name;
- unsigned mode;
-
- elem = tree_entry_extract(&desc, &name, &mode);
- if (!has_sha1_file(elem) ||
- (S_ISDIR(mode) && !tree_is_complete(elem))) {
- free(buf);
+ if (tree->object.flags & SEEN)
+ return 1;
+ if (tree->object.flags & INCOMPLETE)
+ return 0;
+
+ desc.buf = tree->buffer;
+ desc.size = tree->size;
+ if (!desc.buf) {
+ enum object_type type;
+ void *data = read_sha1_file(sha1, &type, &desc.size);
+ if (!data) {
+ tree->object.flags |= INCOMPLETE;
return 0;
}
- update_tree_entry(&desc);
+ desc.buf = data;
+ tree->buffer = data;
}
- free(buf);
- return 1;
+ complete = 1;
+ while (tree_entry(&desc, &entry)) {
+ if (!has_sha1_file(entry.sha1) ||
+ (S_ISDIR(entry.mode) && !tree_is_complete(entry.sha1))) {
+ tree->object.flags |= INCOMPLETE;
+ complete = 0;
+ }
+ }
+ free(tree->buffer);
+ tree->buffer = NULL;
+
+ if (complete)
+ tree->object.flags |= SEEN;
+ return complete;
+}
+
+static int commit_is_complete(struct commit *commit)
+{
+ struct object_array study;
+ struct object_array found;
+ int is_incomplete = 0;
+ int i;
+
+ /* early return */
+ if (commit->object.flags & SEEN)
+ return 1;
+ if (commit->object.flags & INCOMPLETE)
+ return 0;
+ /*
+ * Find all commits that are reachable and are not marked as
+ * SEEN. Then make sure the trees and blobs contained are
+ * complete. After that, mark these commits also as SEEN.
+ * If some of the objects that are needed to complete this
+ * commit are missing, mark this commit as INCOMPLETE.
+ */
+ memset(&study, 0, sizeof(study));
+ memset(&found, 0, sizeof(found));
+ add_object_array(&commit->object, NULL, &study);
+ add_object_array(&commit->object, NULL, &found);
+ commit->object.flags |= STUDYING;
+ while (study.nr) {
+ struct commit *c;
+ struct commit_list *parent;
+
+ c = (struct commit *)study.objects[--study.nr].item;
+ if (!c->object.parsed && !parse_object(c->object.sha1))
+ c->object.flags |= INCOMPLETE;
+
+ if (c->object.flags & INCOMPLETE) {
+ is_incomplete = 1;
+ break;
+ }
+ else if (c->object.flags & SEEN)
+ continue;
+ for (parent = c->parents; parent; parent = parent->next) {
+ struct commit *p = parent->item;
+ if (p->object.flags & STUDYING)
+ continue;
+ p->object.flags |= STUDYING;
+ add_object_array(&p->object, NULL, &study);
+ add_object_array(&p->object, NULL, &found);
+ }
+ }
+ if (!is_incomplete) {
+ /*
+ * make sure all commits in "found" array have all the
+ * necessary objects.
+ */
+ for (i = 0; i < found.nr; i++) {
+ struct commit *c =
+ (struct commit *)found.objects[i].item;
+ if (!tree_is_complete(c->tree->object.sha1)) {
+ is_incomplete = 1;
+ c->object.flags |= INCOMPLETE;
+ }
+ }
+ if (!is_incomplete) {
+ /* mark all found commits as complete, iow SEEN */
+ for (i = 0; i < found.nr; i++)
+ found.objects[i].item->flags |= SEEN;
+ }
+ }
+ /* clear flags from the objects we traversed */
+ for (i = 0; i < found.nr; i++)
+ found.objects[i].item->flags &= ~STUDYING;
+ if (is_incomplete)
+ commit->object.flags |= INCOMPLETE;
+ else {
+ /*
+ * If we come here, we have (1) traversed the ancestry chain
+ * from the "commit" until we reach SEEN commits (which are
+ * known to be complete), and (2) made sure that the commits
+ * encountered during the above traversal refer to trees that
+ * are complete. Which means that we know *all* the commits
+ * we have seen during this process are complete.
+ */
+ for (i = 0; i < found.nr; i++)
+ found.objects[i].item->flags |= SEEN;
+ }
+ /* free object arrays */
+ free(study.objects);
+ free(found.objects);
+ return !is_incomplete;
}
static int keep_entry(struct commit **it, unsigned char *sha1)
{
struct commit *commit;
- *it = NULL;
if (is_null_sha1(sha1))
return 1;
commit = lookup_commit_reference_gently(sha1, 1);
if (!commit)
return 0;
- /* Make sure everything in this commit exists. */
- parse_object(commit->object.sha1);
- if (!tree_is_complete(commit->tree->object.sha1))
+ /*
+ * Make sure everything in this commit exists.
+ *
+ * We have walked all the objects reachable from the refs
+ * and cache earlier. The commits reachable by this commit
+ * must meet SEEN commits -- and then we should mark them as
+ * SEEN as well.
+ */
+ if (!commit_is_complete(commit))
return 0;
*it = commit;
return 1;
}
static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
- char *data, void *cb_data)
+ const char *email, unsigned long timestamp, int tz,
+ const char *message, void *cb_data)
{
struct expire_reflog_cb *cb = cb_data;
- unsigned long timestamp;
- char *cp, *ep;
struct commit *old, *new;
- cp = strchr(data, '>');
- if (!cp || *++cp != ' ')
- goto prune;
- timestamp = strtoul(cp, &ep, 10);
- if (*ep != ' ')
- goto prune;
- if (timestamp < cb->expire_total)
+ if (timestamp < cb->cmd->expire_total)
goto prune;
- if (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1))
+ old = new = NULL;
+ if (cb->cmd->stalefix &&
+ (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
goto prune;
- if ((timestamp < cb->expire_unreachable) &&
- (!cb->ref_commit ||
- (old && !in_merge_bases(old, cb->ref_commit)) ||
- (new && !in_merge_bases(new, cb->ref_commit))))
- goto prune;
+ if (timestamp < cb->cmd->expire_unreachable) {
+ if (!cb->ref_commit)
+ goto prune;
+ if (!old && !is_null_sha1(osha1))
+ old = lookup_commit_reference_gently(osha1, 1);
+ if (!new && !is_null_sha1(nsha1))
+ new = lookup_commit_reference_gently(nsha1, 1);
+ if ((old && !in_merge_bases(old, &cb->ref_commit, 1)) ||
+ (new && !in_merge_bases(new, &cb->ref_commit, 1)))
+ goto prune;
+ }
- if (cb->newlog)
- fprintf(cb->newlog, "%s %s %s",
- sha1_to_hex(osha1), sha1_to_hex(nsha1), data);
+ if (cb->newlog) {
+ char sign = (tz < 0) ? '-' : '+';
+ int zone = (tz < 0) ? (-tz) : tz;
+ fprintf(cb->newlog, "%s %s %s %lu %c%04d\t%s",
+ sha1_to_hex(osha1), sha1_to_hex(nsha1),
+ email, timestamp, sign, zone,
+ message);
+ }
+ if (cb->cmd->verbose)
+ printf("keep %s", message);
return 0;
prune:
- if (!cb->newlog)
- fprintf(stderr, "would prune %s", data);
+ if (!cb->newlog || cb->cmd->verbose)
+ printf("%sprune %s", cb->newlog ? "" : "would ", message);
return 0;
}
-struct cmd_reflog_expire_cb {
- int dry_run;
- unsigned long expire_total;
- unsigned long expire_unreachable;
-};
-
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 *newlog_path = NULL;
+ char *log_file, *newlog_path = NULL;
int status = 0;
- if (strncmp(ref, "refs/", 5))
- return error("not a ref '%s'", ref);
-
memset(&cb, 0, sizeof(cb));
/* we take the lock for the ref itself to prevent it from
* getting updated.
*/
- lock = lock_ref_sha1(ref + 5, sha1);
+ lock = lock_any_ref_for_update(ref, sha1);
if (!lock)
return error("cannot lock ref '%s'", ref);
- if (!file_exists(lock->log_file))
+ log_file = xstrdup(git_path("logs/%s", ref));
+ if (!file_exists(log_file))
goto finish;
if (!cmd->dry_run) {
newlog_path = xstrdup(git_path("logs/%s.lock", ref));
}
cb.ref_commit = lookup_commit_reference_gently(sha1, 1);
- if (!cb.ref_commit)
- fprintf(stderr,
- "warning: ref '%s' does not point at a commit\n", ref);
cb.ref = ref;
- cb.expire_total = cmd->expire_total;
- cb.expire_unreachable = cmd->expire_unreachable;
+ cb.cmd = cmd;
for_each_reflog_ent(ref, expire_reflog_ent, &cb);
finish:
if (cb.newlog) {
if (fclose(cb.newlog))
status |= error("%s: %s", strerror(errno),
newlog_path);
- if (rename(newlog_path, lock->log_file)) {
+ if (rename(newlog_path, log_file)) {
status |= error("cannot rename %s to %s",
- newlog_path, lock->log_file);
+ newlog_path, log_file);
unlink(newlog_path);
}
}
free(newlog_path);
+ free(log_file);
unlock_ref(lock);
return status;
}
return 0;
}
-static const char reflog_expire_usage[] =
-"git-reflog expire [--dry-run] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
-
static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
{
struct cmd_reflog_expire_cb cb;
cb.expire_total = default_reflog_expire;
cb.expire_unreachable = default_reflog_expire_unreachable;
+ /*
+ * We can trust the commits and objects reachable from refs
+ * even in older repository. We cannot trust what's reachable
+ * from reflog if the repository was pruned with older git.
+ */
+
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
cb.dry_run = 1;
- else if (!strncmp(arg, "--expire=", 9))
+ else if (!prefixcmp(arg, "--expire="))
cb.expire_total = approxidate(arg + 9);
- else if (!strncmp(arg, "--expire-unreachable=", 21))
+ else if (!prefixcmp(arg, "--expire-unreachable="))
cb.expire_unreachable = approxidate(arg + 21);
+ else if (!strcmp(arg, "--stale-fix"))
+ cb.stalefix = 1;
else if (!strcmp(arg, "--all"))
do_all = 1;
+ else if (!strcmp(arg, "--verbose"))
+ cb.verbose = 1;
else if (!strcmp(arg, "--")) {
i++;
break;
else
break;
}
+ if (cb.stalefix) {
+ init_revisions(&cb.revs, prefix);
+ if (cb.verbose)
+ printf("Marking reachable objects...");
+ mark_reachable_objects(&cb.revs, 0);
+ if (cb.verbose)
+ putchar('\n');
+ }
+
if (do_all)
- status |= for_each_ref(expire_reflog, &cb);
+ status |= for_each_reflog(expire_reflog, &cb);
while (i < argc) {
const char *ref = argv[i++];
unsigned char sha1[20];
return status;
}
+/*
+ * main "reflog"
+ */
+
static const char reflog_usage[] =
"git-reflog (expire | ...)";
int cmd_reflog(int argc, const char **argv, const char *prefix)
{
- if (argc < 2)
- usage(reflog_usage);
- else if (!strcmp(argv[1], "expire"))
+ /* With no command, we default to showing it. */
+ if (argc < 2 || *argv[1] == '-')
+ return cmd_log_reflog(argc, argv, prefix);
+
+ if (!strcmp(argv[1], "show"))
+ return cmd_log_reflog(argc - 1, argv + 1, prefix);
+
+ if (!strcmp(argv[1], "expire"))
return cmd_reflog_expire(argc - 1, argv + 1, prefix);
- else
- usage(reflog_usage);
+
+ /* Not a recognized reflog command..*/
+ usage(reflog_usage);
}