Show interpreted branch name in error messages

Change the error message when doing: "git branch @{-1}",
"git checkout -b @{-1}", or "git branch -m foo @{-1}"

 * was: A branch named '@{-1}' already exists.
 * now: A branch named 'bar' already exists.

Signed-off-by: Conrad Irwin <conrad.irwin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/branch.c b/branch.c
index ff84b5b9b70280123343c20db66424f7dee349c6..1fe3078a6cade3c34c5dcd65977b286840bec6ee 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -146,7 +146,7 @@ int validate_new_branchname(const char *name, struct strbuf *ref, int force)
        if (!ref_exists(ref->buf))
                return 0;
        else if (!force)
-               die("A branch named '%s' already exists.", name);
+               die("A branch named '%s' already exists.", ref->buf + strlen("refs/heads/"));
 
        head = resolve_ref("HEAD", sha1, 0, NULL);
        if (!is_bare_repository() && head && !strcmp(head, ref->buf))

diff --git a/t/t2018-checkout-branch.sh b/t/t2018-checkout-branch.sh
index b66db2b8818b7b084889ea1b2c7687fc59c12127..75874e85dfbcae8ea9634693a93524841b741559 100755 (executable)
--- a/t/t2018-checkout-branch.sh
+++ b/t/t2018-checkout-branch.sh
@@ -118,6 +118,15 @@ test_expect_success 'checkout -b to an existing branch fails' '
        test_must_fail do_checkout branch2 $HEAD2
 '
 
+test_expect_success 'checkout -b to @{-1} fails with the right branch name' '
+       git reset --hard HEAD &&
+       git checkout branch1 &&
+       git checkout branch2 &&
+       echo  >expect "fatal: A branch named '\''branch1'\'' already exists." &&
+       test_must_fail git checkout -b @{-1} 2>actual &&
+       test_cmp expect actual
+'
+
 test_expect_success 'checkout -B to an existing branch resets branch to HEAD' '
        git checkout branch1 &&