Do not allow git_branch_create() to force update branch
diff --git a/src/branch.c b/src/branch.c
index 133d6f6..1ebaf8e 100644
--- a/src/branch.c
+++ b/src/branch.c
@@ -58,6 +58,7 @@ int git_branch_create(
const git_signature *signature,
const char *log_message)
{
+ int is_head = 0;
git_reference *branch = NULL;
git_buf canonical_branch_name = GIT_BUF_INIT,
log_message_buf = GIT_BUF_INIT;
@@ -65,7 +66,19 @@ int git_branch_create(
assert(branch_name && commit && ref_out);
assert(git_object_owner((const git_object *)commit) == repository);
+ if (git_branch_lookup(&branch, repository, branch_name, GIT_BRANCH_LOCAL) == 0) {
+ if ((is_head = git_branch_is_head(branch)) < 0) {
+ error = is_head;
+ goto cleanup;
+ }
+ }
+ if (is_head && force) {
+ giterr_set(GITERR_REFERENCE, "Cannot force update branch '%s' as it is "
+ "the current HEAD of the repository.", git_reference_name(branch));
+ goto cleanup;
+ }
+
if (git_buf_joinpath(&canonical_branch_name, GIT_REFS_HEADS_DIR, branch_name) < 0)
goto cleanup;