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authorDavid Turner <dturner@twopensource.com>2015-07-21 17:04:53 -0400
committerJunio C Hamano <gitster@pobox.com>2015-07-21 14:08:14 -0700
commitafcb2e7a3b855887e79d1ee6d70ec80ab6456a64 (patch)
tree5c4413fe1e3a15342dee8e118dfa86c9e1f106dc
parentabd0cd3a3018e1c4e9e4437fb3911d6658e99fec (diff)
downloadgit-afcb2e7a3b855887e79d1ee6d70ec80ab6456a64.tar.gz
git-reflog: add exists command
This is necessary because alternate ref backends might store reflogs somewhere other than .git/logs. Code that now directly manipulates .git/logs should instead go through git-reflog. Signed-off-by: David Turner <dturner@twopensource.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--Documentation/git-reflog.txt4
-rw-r--r--builtin/reflog.c33
-rwxr-xr-xt/t1411-reflog-show.sh5
3 files changed, 41 insertions, 1 deletions
diff --git a/Documentation/git-reflog.txt b/Documentation/git-reflog.txt
index 5e7908e4f7..44c736f1a8 100644
--- a/Documentation/git-reflog.txt
+++ b/Documentation/git-reflog.txt
@@ -23,6 +23,7 @@ depending on the subcommand:
[--dry-run] [--verbose] [--all | <refs>...]
'git reflog delete' [--rewrite] [--updateref]
[--dry-run] [--verbose] ref@\{specifier\}...
+'git reflog exists' <ref>
Reference logs, or "reflogs", record when the tips of branches and
other references were updated in the local repository. Reflogs are
@@ -52,6 +53,9 @@ argument must be an _exact_ entry (e.g. "`git reflog delete
master@{2}`"). This subcommand is also typically not used directly by
end users.
+The "exists" subcommand checks whether a ref has a reflog. It exits
+with zero status if the reflog exists, and non-zero status if it does
+not.
OPTIONS
-------
diff --git a/builtin/reflog.c b/builtin/reflog.c
index c2eb8ff840..7ed0e8501c 100644
--- 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;
@@ -699,12 +701,38 @@ 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 +752,8 @@ 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);
}
diff --git a/t/t1411-reflog-show.sh b/t/t1411-reflog-show.sh
index 6f47c0dd0e..3eb4f102e5 100755
--- a/t/t1411-reflog-show.sh
+++ b/t/t1411-reflog-show.sh
@@ -166,4 +166,9 @@ test_expect_success 'git log -g -p shows diffs vs. parents' '
test_cmp expect actual
'
+test_expect_success 'reflog exists works' '
+ git reflog exists refs/heads/master &&
+ ! git reflog exists refs/heads/nonexistent
+'
+
test_done