Make old sha1 optional with git update-ref -d

Giving the old sha1 is already optional when changing a ref, and it's
quite handy when running update-ref manually. So make it optional for
deleting a ref too.

Signed-off-by: Karl Hasselström <kha@treskal.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-update-ref.txt b/Documentation/git-update-ref.txt
index 4dc475992eeb20c7979850db0e85024a91e475c2..80b94c36d914756cdf052355e5a63ea2014ae181 100644 (file)
--- a/Documentation/git-update-ref.txt
+++ b/Documentation/git-update-ref.txt
@@ -7,7 +7,7 @@ git-update-ref - Update the object name stored in a ref safely
 
 SYNOPSIS
 --------
-'git-update-ref' [-m <reason>] (-d <ref> <oldvalue> | [--no-deref] <ref> <newvalue> [<oldvalue>])
+'git-update-ref' [-m <reason>] (-d <ref> [<oldvalue>] | [--no-deref] <ref> <newvalue> [<oldvalue>])
 
 DESCRIPTION
 -----------

diff --git a/builtin-update-ref.c b/builtin-update-ref.c
index 1e714a3c93416a081cb8d83c7a3d33b7dd265c88..d90d11d2e35c38baab32f05f58125aaf1baee6cc 100644 (file)
--- a/builtin-update-ref.c
+++ b/builtin-update-ref.c
@@ -4,7 +4,7 @@
 #include "parse-options.h"
 
 static const char * const git_update_ref_usage[] = {
-       "git-update-ref [options] -d <refname> <oldval>",
+       "git-update-ref [options] -d <refname> [<oldval>]",
        "git-update-ref [options]    <refname> <newval> [<oldval>]",
        NULL
 };
@@ -28,7 +28,7 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
                die("Refusing to perform update with empty message.");
 
        if (delete) {
-               if (argc != 2)
+               if (argc < 1 || argc > 2)
                        usage_with_options(git_update_ref_usage, options);
                refname = argv[0];
                oldval = argv[1];
@@ -48,7 +48,7 @@ int cmd_update_ref(int argc, const char **argv, const char *prefix)
                die("%s: not a valid old SHA1", oldval);
 
        if (delete)
-               return delete_ref(refname, oldsha1);
+               return delete_ref(refname, oldval ? oldsha1 : NULL);
        else
                return update_ref(msg, refname, sha1, oldval ? oldsha1 : NULL,
                                  no_deref ? REF_NODEREF : 0, DIE_ON_ERR);

diff --git a/t/t1400-update-ref.sh b/t/t1400-update-ref.sh
index b8b7ab410354b01584092802365f4b53cd991b4a..f387d46f1a17ac9f9d3319c4da7e30a6c6326c67 100755 (executable)
--- a/t/t1400-update-ref.sh
+++ b/t/t1400-update-ref.sh
@@ -42,6 +42,14 @@ test_expect_success "delete $m" '
 '
 rm -f .git/$m
 
+test_expect_success "delete $m without oldvalue verification" "
+       git update-ref $m $A &&
+       test $A = \$(cat .git/$m) &&
+       git update-ref -d $m &&
+       ! test -f .git/$m
+"
+rm -f .git/$m
+
 test_expect_success \
        "fail to create $n" \
        "touch .git/$n_dir