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-rw-r--r--builtin/checkout.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/builtin/checkout.c b/builtin/checkout.c
index f1984d9..a76aa2a 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -922,6 +922,17 @@ static int parse_branchname_arg(int argc, const char **argv,
return argcount;
}
+static int switch_unborn_to_new_branch(struct checkout_opts *opts)
+{
+ int status;
+ struct strbuf branch_ref = STRBUF_INIT;
+
+ strbuf_addf(&branch_ref, "refs/heads/%s", opts->new_branch);
+ status = create_symref("HEAD", branch_ref.buf, "checkout -b");
+ strbuf_release(&branch_ref);
+ return status;
+}
+
int cmd_checkout(int argc, const char **argv, const char *prefix)
{
struct checkout_opts opts;
@@ -1093,5 +1104,13 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
if (opts.writeout_stage)
die(_("--ours/--theirs is incompatible with switching branches."));
+ if (!new.commit) {
+ unsigned char rev[20];
+ int flag;
+
+ if (!read_ref_full("HEAD", rev, 0, &flag) &&
+ (flag & REF_ISSYMREF) && is_null_sha1(rev))
+ return switch_unborn_to_new_branch(&opts);
+ }
return switch_branches(&opts, &new);
}