fix: make execubale

Author: ronnnnn

src/index.ts

@@ -48,6 +48,8 @@ async function run() {
     const installedPath = await installFlutterGen(version, cacheEnabled, cacheKey, cachePath);
     info(`FlutterGen installed: ${installedPath}`);
 
+    await makeExecutable(join(installedPath, 'fluttergen'));
+
     await execa('fluttergen', ['--version'], { stdio: 'inherit' });
 
     setOutput('version', version);
@@ -96,7 +98,6 @@ async function installFlutterGen(
     const hitCacheKey = await restoreCache([cachePath], cacheKey);
     if (hitCacheKey) {
       info(`Restored FlutterGen from cache: ${cachePath}`);
-      addPath(cachePath);
       return cachePath;
     }
   }
@@ -125,7 +126,6 @@ async function installFlutterGen(
   const downloadPath = await downloadTool(downloadUrl);
 
   const extractDir = await extractTar(downloadPath, cachePath);
-  addPath(extractDir);
 
   if (cacheEnabled) {
     await saveCache([extractDir], cacheKey);
@@ -135,4 +135,9 @@ async function installFlutterGen(
   return extractDir;
 }
 
+async function makeExecutable(fluttergenPath: string): Promise<void> {
+  await execa('chmod', ['+x', fluttergenPath]);
+  addPath(fluttergenPath);
+}
+
 run();