Gate changes behind new format FF

Author: mbg

lib/entry-points.js

@@ -489,7 +489,11 @@ export async function loadUserConfig(
   apiDetails: api.GitHubApiCombinedDetails,
   tempDir: string,
 ): Promise<UserConfig> {
-  if (isLocal(configFile)) {
+  const allowNewFormat = await actionState.features.getValue(
+    Feature.NewRemoteFileAddresses,
+  );
+
+  if (isLocal(configFile, allowNewFormat)) {
     if (configFile !== userConfigFromActionPath(tempDir)) {
       // If the config file is not generated by the Action, it should be relative to the workspace.
       configFile = path.resolve(workspacePath, configFile);
@@ -508,7 +512,7 @@ export async function loadUserConfig(
     // Drop the explicit prefix if it is present. Since `REMOTE_PATH_PREFIX` is chosen
     // to not conflict with permissible characters in "owner" or "repo" components,
     // this does not risk removing valid parts of either component by accident.
-    if (isExplicitRemotePath(configFile)) {
+    if (allowNewFormat && isExplicitRemotePath(configFile)) {
       configFile = configFile.substring(REMOTE_PATH_PREFIX.length);
     }
     return await getRemoteConfig(actionState, configFile, apiDetails);
@@ -1322,7 +1326,7 @@ function containsAtRef(configPath: string): boolean {
  * @param configPath The path to test.
  * @returns True if it is local, or false otherwise.
  */
-function isLocal(configPath: string): boolean {
+function isLocal(configPath: string, allowNewFormat: boolean): boolean {
   // If the path starts with `LOCAL_PATH_PREFIX`, it is explicitly local.
   // This allows local paths that would otherwise contain '@'
   // to be used with a `LOCAL_PATH_PREFIX` prefix.
@@ -1331,7 +1335,7 @@ function isLocal(configPath: string): boolean {
   }
   // If the path starts with `REMOTE_PATH_PREFIX`, it is explicitly remote.
   // This allows users to resolve ambiguity by specifying `REMOTE_PATH_PREFIX`.
-  if (isExplicitRemotePath(configPath)) {
+  if (allowNewFormat && isExplicitRemotePath(configPath)) {
     return false;
   }