+
+int git_branch_name_is_valid(int *valid, const char *name)
+{
+ git_buf ref_name = GIT_BUF_INIT;
+ int error = 0;
+
+ GIT_ASSERT(valid);
+
+ *valid = 0;
+
+ /*
+ * Discourage branch name starting with dash,
+ * https://github.com/git/git/commit/6348624010888b
+ * and discourage HEAD as branch name,
+ * https://github.com/git/git/commit/a625b092cc5994
+ */
+ if (!name || name[0] == '-' || !git__strcmp(name, "HEAD"))
+ goto done;
+
+ if ((error = git_buf_puts(&ref_name, GIT_REFS_HEADS_DIR)) < 0 ||
+ (error = git_buf_puts(&ref_name, name)) < 0)
+ goto done;
+
+ error = git_reference_name_is_valid(valid, ref_name.ptr);
+
+done:
+ git_buf_dispose(&ref_name);
+ return error;
+}