fix PUB_TOKEN request

.github/actions/publish_flutter_package/action.yaml

@@ -14,39 +14,17 @@ runs:
     - name: 🐦 Setup Flutter
       uses: subosito/flutter-action@v2
 
-# Future<void> createPubOIDCToken() async {
-#   final tokenRequestUrl = process.env('ACTIONS_ID_TOKEN_REQUEST_URL');
-#   final tokenRequestToken = process.env('ACTIONS_ID_TOKEN_REQUEST_TOKEN');
-
-#   if (tokenRequestUrl == null || tokenRequestToken == null) {
-#     return;
-#   }
-
-#   final token =
-#       await promiseToFuture<String>(core.getIDToken('https://pub.dev'));
-
-#   core.exportVariable('PUB_TOKEN', token);
-
-#   await promiseToFuture<void>(exec.exec(
-#     'dart',
-#     [
-#       'pub'.toJS,
-#       'token'.toJS,
-#       'add'.toJS,
-#       'https://pub.dev'.toJS,
-#       '--env-var'.toJS,
-#       'PUB_TOKEN'.toJS,
-#     ].toJS,
-#   ));
-# }
-# Get the token and put it in the PUB_TOKEN environment variable
-# curl -H "Authorization: bearer $ACTIONS_ID_TOKEN_REQUEST_TOKEN" "$ACTIONS_ID_TOKEN_REQUEST_URL&audience=https://pub.dev/"
-# flutter pub pub token add --host https://pub.dev --env-var PUB_TOKEN
-
-    - name: Get OIDC token
+    - name: ☎️ Install OIDC Client from Core Package
       shell: ${{ inputs.shell }}
-      run: |
-        curl -H "Authorization: bearer $ACTIONS_ID_TOKEN_REQUEST_TOKEN" "$ACTIONS_ID_TOKEN_REQUEST_URL&audience=https://pub.dev/"
+      run: npm install @actions/core@1.6.0 @actions/http-client
+
+    - name: 🪪 Get Id Token
+      uses: actions/github-script@v6
+      with:
+        script: |
+          const core = require('@actions/core')
+          let pub_token = await core.getIDToken('https://pub.dev/')
+          core.setOutput('PUB_TOKEN', pub_token)
 
     - name: 📢 Authenticate
       shell: ${{ inputs.shell }}