Fix API raw file content access for default branch (#2849)

integrations/api_repo_raw_test.go

@@ -25,4 +25,7 @@ func TestAPIReposRaw(t *testing.T) {
 		req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/raw/%s/README.md", user.Name, ref)
 		session.MakeRequest(t, req, http.StatusOK)
 	}
+	// Test default branch
+	req := NewRequestf(t, "GET", "/api/v1/repos/%s/repo1/raw/README.md", user.Name)
+	session.MakeRequest(t, req, http.StatusOK)
 }

modules/context/repo.go

@@ -507,7 +507,11 @@ func getRefName(ctx *Context, pathType RepoRefType) string {
 		if refName := getRefName(ctx, RepoRefTag); len(refName) > 0 {
 			return refName
 		}
-		return getRefName(ctx, RepoRefCommit)
+		if refName := getRefName(ctx, RepoRefCommit); len(refName) > 0 {
+			return refName
+		}
+		ctx.Repo.TreePath = path
+		return ctx.Repo.Repository.DefaultBranch
 	case RepoRefBranch:
 		return getRefNameFromPath(ctx, path, ctx.Repo.GitRepo.IsBranchExist)
 	case RepoRefTag: