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| author | Chris Webb <chris@arachsys.com> | 2012-06-26 16:06:42 +0100 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2012-06-26 11:11:14 -0700 |
| commit | 8ced1aa08f9e1798b2b3fec41a0598ef79b477fe (patch) | |
| tree | 4cad32f246e34e8686b0dae6045c60875de8f4ae | |
| parent | abe199808c6586047fb7255b80e3d17ffc26bf6c (diff) | |
| download | git-8ced1aa08f9e1798b2b3fec41a0598ef79b477fe.tar.gz | |
git-checkout: disallow --detach on unborn branch
abe199808c (git checkout -b: allow switching out of an unborn branch)
introduced a bug demonstrated by
git checkout --orphan foo
git checkout --detach
git symbolic-ref HEAD
which gives 'refs/heads/(null)'.
This happens because we strbuf_addf(&branch_ref, "refs/heads/%s",
opts->new_branch) when opts->new_branch can be NULL for --detach.
Catch and forbid this case, adding a test to t2017 to catch it in
future.
Signed-off-by: Chris Webb <chris@arachsys.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | builtin/checkout.c | 2 | ||||
| -rwxr-xr-x | t/t2017-checkout-orphan.sh | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/builtin/checkout.c b/builtin/checkout.c index b76e2c0451..a94b553d05 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -921,6 +921,8 @@ static int switch_unborn_to_new_branch(struct checkout_opts *opts) int status; struct strbuf branch_ref = STRBUF_INIT; + if (!opts->new_branch) + die(_("You are on a branch yet to be born")); strbuf_addf(&branch_ref, "refs/heads/%s", opts->new_branch); status = create_symref("HEAD", branch_ref.buf, "checkout -b"); strbuf_release(&branch_ref); diff --git a/t/t2017-checkout-orphan.sh b/t/t2017-checkout-orphan.sh index 0e3b8582f2..655f278c5f 100755 --- a/t/t2017-checkout-orphan.sh +++ b/t/t2017-checkout-orphan.sh @@ -116,4 +116,10 @@ test_expect_success '--orphan refuses to switch if a merge is needed' ' git reset --hard ' +test_expect_success 'cannot --detach on an unborn branch' ' + git checkout master && + git checkout --orphan new && + test_must_fail git checkout --detach +' + test_done |