files_log_ref_write: new function

diff --git a/builtin/reflog.c b/builtin/reflog.c
index c2eb8ff8402068d7480a3afd262219cb03841ae1..cf1145e635c559206a6b0d61e41321fa914e5e42 100644 (file)
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -13,6 +13,8 @@ static const char reflog_expire_usage[] =
 "git reflog expire [--expire=<time>] [--expire-unreachable=<time>] [--rewrite] [--updateref] [--stale-fix] [--dry-run | -n] [--verbose] [--all] <refs>...";
 static const char reflog_delete_usage[] =
 "git reflog delete [--rewrite] [--updateref] [--dry-run | -n] [--verbose] <refs>...";
+static const char reflog_exists_usage[] =
+"git reflog exists <ref>";
 
 static unsigned long default_reflog_expire;
 static unsigned long default_reflog_expire_unreachable;
@@ -216,7 +218,6 @@ static int keep_entry(struct commit **it, unsigned char *sha1)
  */
 static void mark_reachable(struct expire_reflog_policy_cb *cb)
 {
-       struct commit *commit;
        struct commit_list *pending;
        unsigned long expire_limit = cb->mark_limit;
        struct commit_list *leftover = NULL;
@@ -226,11 +227,8 @@ static void mark_reachable(struct expire_reflog_policy_cb *cb)
 
        pending = cb->mark_list;
        while (pending) {
-               struct commit_list *entry = pending;
                struct commit_list *parent;
-               pending = entry->next;
-               commit = entry->item;
-               free(entry);
+               struct commit *commit = pop_commit(&pending);
                if (commit->object.flags & REACHABLE)
                        continue;
                if (parse_commit(commit))
@@ -427,7 +425,7 @@ static int parse_expire_cfg_value(const char *var, const char *value, unsigned l
        if (!value)
                return config_error_nonbool(var);
        if (parse_expiry_date(value, expire))
-               return error(_("%s' for '%s' is not a valid timestamp"),
+               return error(_("'%s' for '%s' is not a valid timestamp"),
                             value, var);
        return 0;
 }
@@ -699,12 +697,38 @@ static int cmd_reflog_delete(int argc, const char **argv, const char *prefix)
        return status;
 }
 
+static int cmd_reflog_exists(int argc, const char **argv, const char *prefix)
+{
+       int i, start = 0;
+
+       for (i = 1; i < argc; i++) {
+               const char *arg = argv[i];
+               if (!strcmp(arg, "--")) {
+                       i++;
+                       break;
+               }
+               else if (arg[0] == '-')
+                       usage(reflog_exists_usage);
+               else
+                       break;
+       }
+
+       start = i;
+
+       if (argc - start != 1)
+               usage(reflog_exists_usage);
+
+       if (check_refname_format(argv[start], REFNAME_ALLOW_ONELEVEL))
+               die("invalid ref format: %s", argv[start]);
+       return !reflog_exists(argv[start]);
+}
+
 /*
  * main "reflog"
  */
 
 static const char reflog_usage[] =
-"git reflog [ show | expire | delete ]";
+"git reflog [ show | expire | delete | exists ]";
 
 int cmd_reflog(int argc, const char **argv, const char *prefix)
 {
@@ -724,5 +748,8 @@ int cmd_reflog(int argc, const char **argv, const char *prefix)
        if (!strcmp(argv[1], "delete"))
                return cmd_reflog_delete(argc - 1, argv + 1, prefix);
 
+       if (!strcmp(argv[1], "exists"))
+               return cmd_reflog_exists(argc - 1, argv + 1, prefix);
+
        return cmd_log_reflog(argc, argv, prefix);
 }