[PATCH] branch: implement shortcut to delete last branch

[Aaron Greenberg <p@aaronjgreenberg.com>]

Add support for using the "-" shortcut to delete the last checked-out
branch. This functionality already exists for git-merge, git-checkout,
and git-revert.

Signed-off-by: Aaron Greenberg <p@aaronjgreenberg.com>
---
 builtin/branch.c  | 3 +++
 t/t3200-branch.sh | 9 +++++++++
 2 files changed, 12 insertions(+)

diff --git a/builtin/branch.c b/builtin/branch.c
index 6d0cea9..9e37078 100644
--- a/builtin/branch.c
+++ b/builtin/branch.c
@@ -221,6 +221,9 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
 		char *target = NULL;
 		int flags = 0;
 
+		if (!strcmp(argv[i], "-"))
+			argv[i] = "@{-1}";
+
 		strbuf_branchname(&bname, argv[i], allowed_interpret);
 		free(name);
 		name = mkpathdup(fmt, bname.buf);
diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 6c0b7ea..a3ffd54 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -776,6 +776,15 @@ test_expect_success 'deleting currently checked out branch fails' '
 	test_must_fail git branch -d my7
 '
 
+test_expect_success 'test deleting last branch' '
+	git checkout -b my7.2 &&
+	git checkout  - &&
+	sha1=$(git rev-parse my7 | cut -c 1-7) &&
+	echo "Deleted branch my7.2 (was $sha1)." >expect &&
+	git branch -d - >actual 2>&1 &&
+	test_i18ncmp expect actual
+'
+
 test_expect_success 'test --track without .fetch entries' '
 	git branch --track my8 &&
 	test "$(git config branch.my8.remote)" &&
-- 
2.7.4