Merge branch 'jc/merge-base' (early part)
[git/git.git] / builtin-reflog.c
index fb37984..3415551 100644 (file)
@@ -13,7 +13,7 @@
  */
 
 static const char reflog_expire_usage[] =
-"git-reflog expire [--verbose] [--dry-run] [--fix-stale] [--expire=<time>] [--expire-unreachable=<time>] [--all] <refs>...";
+"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;
@@ -173,7 +173,6 @@ 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);
@@ -195,41 +194,46 @@ static int keep_entry(struct commit **it, unsigned char *sha1)
 }
 
 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->cmd->expire_total)
                goto prune;
 
+       old = new = NULL;
        if (cb->cmd->stalefix &&
            (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
                goto prune;
 
-       if ((timestamp < cb->cmd->expire_unreachable) &&
-           (!cb->ref_commit ||
-            (old && !in_merge_bases(old, &cb->ref_commit, 1)) ||
-            (new && !in_merge_bases(new, &cb->ref_commit, 1))))
-               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", data);
+               printf("keep %s", message);
        return 0;
  prune:
        if (!cb->newlog || cb->cmd->verbose)
-               printf("%sprune %s", cb->newlog ? "" : "would ", data);
+               printf("%sprune %s", cb->newlog ? "" : "would ", message);
        return 0;
 }
 
@@ -238,20 +242,18 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
        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));
@@ -259,9 +261,6 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
        }
 
        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.cmd = cmd;
        for_each_reflog_ent(ref, expire_reflog_ent, &cb);
@@ -270,13 +269,14 @@ static int expire_reflog(const char *ref, const unsigned char *sha1, int unused,
                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;
 }
@@ -350,7 +350,7 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
        }
 
        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];
@@ -372,10 +372,16 @@ static const char reflog_usage[] =
 
 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);
 }