Update troubleshooting docs for Python (#488)

Closes https://github.com/google-github-actions/auth/pull/487

---------

Co-authored-by: Abhi Srivastava <bits.abhi@gmail.com>

.github/workflows/draft-release.yml

@@ -1,17 +1,3 @@
-# Copyright 2023 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
 name: 'Draft release'
 
 on:
@@ -27,12 +13,14 @@ on:
           - 'minor'
           - 'patch'
 
+permissions:
+  contents: 'read'
+  pull-requests: 'write'
+
 jobs:
   draft-release:
-    name: 'Draft release'
+    uses: 'google-github-actions/.github/.github/workflows/draft-release.yml@v3' # ratchet:exclude
-    uses: 'google-github-actions/.github/.github/workflows/draft-release.yml@v0'
     with:
       version_strategy: '${{ github.event.inputs.version_strategy }}'
-    # secrets must be explicitly passed to reusable workflows https://docs.github.com/en/enterprise-cloud@latest/actions/using-workflows/reusing-workflows#using-inputs-and-secrets-in-a-reusable-workflow
     secrets:
       ACTIONS_BOT_TOKEN: '${{ secrets.ACTIONS_BOT_TOKEN }}'

.github/workflows/publish.yml

@@ -16,10 +16,10 @@ jobs:
 
     steps:
       - name: 'Checkout'
-        uses: 'actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871' # ratchet:actions/checkout@v4
+        uses: 'actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683' # ratchet:actions/checkout@v4
 
       - name: 'Publish'
         id: 'publish'
-        uses: 'actions/publish-immutable-action@4b1aa5c1cde5fedc80d52746c9546cb5560e5f53' # ratchet:actions/publish-immutable-action@v0.0.3
+        uses: 'actions/publish-immutable-action@4bc8754ffc40f27910afb20287dbbbb675a4e978' # ratchet:actions/publish-immutable-action@v0.0.4
         with:
           github-token: '${{ secrets.GITHUB_TOKEN }}'

.github/workflows/release.yml

@@ -1,17 +1,3 @@
-# Copyright 2023 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
 name: 'Release'
 
 on:
@@ -20,12 +6,12 @@ on:
       - 'main'
       - 'release/**/*'
 
+permissions:
+  contents: 'read'
+  packages: 'write'
+
 jobs:
   release:
-    if: |-
+    uses: 'google-github-actions/.github/.github/workflows/release.yml@v3' # ratchet:exclude
-      ${{ startsWith(github.event.head_commit.message, 'Release: v') }}
-    name: 'Release'
-    uses: 'google-github-actions/.github/.github/workflows/release.yml@v1' # ratchet:exclude
-    # secrets must be explicitly passed to reusable workflows https://docs.github.com/en/enterprise-cloud@latest/actions/using-workflows/reusing-workflows\#using-inputs-and-secrets-in-a-reusable-workflow
     secrets:
       ACTIONS_BOT_TOKEN: '${{ secrets.ACTIONS_BOT_TOKEN }}'

.github/workflows/test.yml

@@ -33,15 +33,19 @@ defaults:
   run:
     shell: 'bash'
 
+permissions:
+  contents: 'read'
+  statuses: 'write'
+
 jobs:
   unit:
     name: 'unit'
     runs-on: 'ubuntu-latest'
 
     steps:
-      - uses: 'actions/checkout@v4'
+      - uses: 'actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683' # ratchet:actions/checkout@v4
 
-      - uses: 'actions/setup-node@v4'
+      - uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
           node-version: '20.x'
 
@@ -74,9 +78,9 @@ jobs:
       id-token: 'write'
 
     steps:
-      - uses: 'actions/checkout@v4'
+      - uses: 'actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683' # ratchet:actions/checkout@v4
 
-      - uses: 'actions/setup-node@v4'
+      - uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
           node-version: '20.x'
 
@@ -99,7 +103,7 @@ jobs:
             --fail \
             --header "Authorization: Bearer ${{ steps.auth-default.outputs.auth_token }}"
 
-      - uses: 'google-github-actions/setup-gcloud@v2'
+      - uses: 'google-github-actions/setup-gcloud@main' # ratchet:exclude
         with:
           version: '>= 363.0.0'
 
@@ -127,9 +131,9 @@ jobs:
       id-token: 'write'
 
     steps:
-      - uses: 'actions/checkout@v4'
+      - uses: 'actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683' # ratchet:actions/checkout@v4
 
-      - uses: 'actions/setup-node@v4'
+      - uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
           node-version: '20.x'
 
@@ -143,7 +147,7 @@ jobs:
           workload_identity_provider: '${{ vars.WIF_PROVIDER_NAME }}'
           service_account: '${{ vars.SERVICE_ACCOUNT_EMAIL }}'
 
-      - uses: 'google-github-actions/setup-gcloud@v2'
+      - uses: 'google-github-actions/setup-gcloud@main' # ratchet:exclude
         with:
           version: '>= 363.0.0'
 
@@ -195,9 +199,9 @@ jobs:
           - 'macos-latest'
 
     steps:
-      - uses: 'actions/checkout@v4'
+      - uses: 'actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683' # ratchet:actions/checkout@v4
 
-      - uses: 'actions/setup-node@v4'
+      - uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
           node-version: '20.x'
 
@@ -210,7 +214,7 @@ jobs:
         with:
           credentials_json: '${{ secrets.SERVICE_ACCOUNT_KEY_JSON }}'
 
-      - uses: 'google-github-actions/setup-gcloud@v2'
+      - uses: 'google-github-actions/setup-gcloud@main' # ratchet:exclude
         with:
           version: '>= 363.0.0'
 
@@ -256,9 +260,9 @@ jobs:
     strategy:
       fail-fast: false
     steps:
-      - uses: 'actions/checkout@v4'
+      - uses: 'actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683' # ratchet:actions/checkout@v4
 
-      - uses: 'actions/setup-node@v4'
+      - uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
           node-version: '20.x'
 
@@ -271,7 +275,7 @@ jobs:
           credentials_json: '${{ secrets.SERVICE_ACCOUNT_KEY_JSON }}'
 
       - name: 'docker'
-        uses: 'docker://alpine:3'
+        uses: 'docker://index.docker.io/library/alpine@sha256:56fa17d2a7e7f168a043a2712e63aed1f8543aeafdcee47c58dcffe38ed51099' # ratchet:docker://alpine:3
         with:
           entrypoint: '/bin/sh'
           args: '-euc "test -n "${GOOGLE_APPLICATION_CREDENTIALS}" && test -r "${GOOGLE_APPLICATION_CREDENTIALS}"'

.github/workflows/troubleshooting.yml

@@ -27,7 +27,7 @@ jobs:
     runs-on: 'ubuntu-latest'
 
     steps:
-      - uses: 'actions/github-script@v7'
+      - uses: 'actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea' # ratchet:actions/github-script@v7
         with:
           script: |-
             const msg =

README.md

@@ -84,6 +84,12 @@ For more usage options, see the [examples](docs/EXAMPLES.md).
 > SDK](https://github.com/firebase/firebase-admin-node/issues/1377). Use Service
 > Account Key JSON authentication instead.
 
+> [!WARNING]
+>
+> As of the time of this writing, the GitHub OIDC token expires in 5 minutes,
+> which means any derived credentials also expire in 5 minutes.
+
+
 The following inputs are for _authenticating_ to Google Cloud via Workload
 Identity Federation.
 
@@ -316,7 +322,6 @@ regardless of the authentication mechanism.
     "token_format" is "id_token".
 
 
-
 <a id="setup"></a>
 ## Setup
 

action.yml

@@ -56,7 +56,7 @@ inputs:
     description: |-
       If true, the action will securely generate a credentials file which can be
       used for authentication via gcloud and Google Cloud SDKs.
-    default: true
+    default: 'true'
     required: false
   export_environment_variables:
     description: |-
@@ -79,7 +79,7 @@ inputs:
       If false, the action will not export any environment variables, meaning
       future steps are unlikely to be automatically authenticated to Google
       Cloud.
-    default: true
+    default: 'true'
     required: false
   token_format:
     description: |-
@@ -113,7 +113,7 @@ inputs:
       If true, the action will remove any created credentials from the
       filesystem upon completion. This only applies if "create_credentials_file"
       is true.
-    default: true
+    default: 'true'
     required: false
 
   # access token params
@@ -175,7 +175,7 @@ inputs:
       generated token. If true, the token will contain "email" and
       "email_verified" claims. This is only valid when "token_format" is
       "id_token".
-    default: false
+    default: 'false'
     required: false
 
 outputs:

docs/EXAMPLES.md

@@ -187,6 +187,69 @@ jobs:
       run: |-
         curl https://myapp-uvehjacqzq.a.run.app \
           --header "Authorization: Bearer ${{ steps.auth.outputs.id_token }}"
+
+    # Example of using ID token in Python code
+    - id: 'python-example'
+      run: |-
+        python -c "
+        import os
+        import requests
+
+        # ID token is available as environment variable
+        id_token = os.environ.get('GOOGLE_ID_TOKEN', '${{ steps.auth.outputs.id_token }}')
+
+        # Use the token to invoke a Cloud Run service
+        response = requests.get(
+            'https://myapp-uvehjacqzq.a.run.app',
+            headers={'Authorization': f'Bearer {id_token}'}
+        )
+        print(response.text)
+        "
+```
+
+### Using Default Credentials with Scopes in Python
+
+When using Workload Identity Federation with Python libraries, you may need to
+add scopes before refreshing credentials:
+
+```yaml
+jobs:
+  job_id:
+    permissions:
+      contents: 'read'
+      id-token: 'write'
+
+    steps:
+    - uses: 'actions/checkout@v4'
+
+    - id: 'auth'
+      uses: 'google-github-actions/auth@v2'
+      with:
+        workload_identity_provider: 'projects/123456789/locations/global/workloadIdentityPools/my-pool/providers/my-provider'
+        service_account: 'my-service-account@my-project.iam.gserviceaccount.com'
+
+    - id: 'python-auth'
+      run: |-
+        python -c "
+        from google.auth import default
+        from google.auth.transport.requests import Request
+
+        # Get default credentials
+        credentials, project = default()
+
+        # Add scopes before refreshing for impersonation
+        credentials = credentials.with_scopes(
+            ['https://www.googleapis.com/auth/cloud-platform']
+        )
+
+        # Refresh to get the token
+        credentials.refresh(request=Request())
+
+        # Now you can use the credentials
+        print(f'Access token: {credentials.token}')
+        if hasattr(credentials, 'id_token'):
+            print(f'ID token: {credentials.id_token}')
+        "
 ```
 
 [github-markdown-toc]: https://github.blog/changelog/2021-04-13-table-of-contents-support-in-markdown-files/

docs/TROUBLESHOOTING.md

@@ -230,6 +230,53 @@ tool like `jq`:
 cat credentials.json | jq -r tostring
 ```
 
+<a name="cannot-refresh"></a>
+
+## Cannot refresh credentials to retrieve an ID token
+
+If you get an error like:
+
+```text
+google.auth.exceptions.RefreshError: ('Unable to acquire impersonated credentials', '{"error": {"code": 400, "message": "Request contains an invalid argument.", "status": "INVALID_ARGUMENT"}}')
+```
+
+when trying to refresh credentials in Python code to get an ID token, this is
+usually because the credentials are missing required scopes. The Google Auth
+library requires scopes to be set when refreshing credentials for impersonation.
+
+To fix this issue, add the required scopes before refreshing:
+
+```python
+from google.auth import default
+from google.auth.transport.requests import Request
+
+credentials, project = default()
+
+# Add scopes before refreshing
+credentials = credentials.with_scopes(
+    ["https://www.googleapis.com/auth/cloud-platform"]
+)
+credentials.refresh(request=Request())
+
+# Now you can access the ID token
+print(credentials.id_token)
+```
+
+Alternatively, you can use the `token_format` parameter of this action to
+generate an ID token directly:
+
+```yaml
+- uses: 'google-github-actions/auth@v2'
+  with:
+    workload_identity_provider: ${{ secrets.WIF_PROVIDER }}
+    service_account: ${{ secrets.WIF_SERVICE_ACCOUNT }}
+    token_format: 'id_token'
+    id_token_audience: 'https://example.com'
+```
+
+This will export the ID token as an environment variable that you can use in
+your Python code.
+
 ## Organizational Policy Constraints
 
 > **ℹ️ NOTE!** Your Google Cloud organization administrator controls these

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@google-github-actions/auth",
-  "version": "2.1.7",
+  "version": "2.1.10",
   "description": "Authenticate to Google Cloud using OIDC tokens or JSON service account keys.",
   "main": "dist/main/index.js",
   "scripts": {
@@ -23,22 +23,22 @@
   "author": "GoogleCloudPlatform",
   "license": "Apache-2.0",
   "dependencies": {
-    "@actions/core": "^1.10.1",
+    "@actions/core": "^1.11.1",
-    "@actions/http-client": "^2.2.2",
+    "@actions/http-client": "^2.2.3",
-    "@google-github-actions/actions-utils": "^0.8.3"
+    "@google-github-actions/actions-utils": "^0.8.6"
   },
   "devDependencies": {
-    "@eslint/eslintrc": "^3.1.0",
+    "@eslint/eslintrc": "^3.3.1",
-    "@eslint/js": "^9.9.0",
+    "@eslint/js": "^9.25.1",
-    "@types/node": "^22.4.1",
+    "@types/node": "^22.14.1",
-    "@vercel/ncc": "^0.38.1",
+    "@vercel/ncc": "^0.38.3",
-    "eslint-config-prettier": "^9.1.0",
+    "eslint-config-prettier": "^10.1.2",
-    "eslint-plugin-prettier": "^5.2.1",
+    "eslint-plugin-prettier": "^5.2.6",
-    "eslint": "^9.9.0",
+    "eslint": "^9.25.1",
-    "prettier": "^3.3.3",
+    "prettier": "^3.5.3",
     "ts-node": "^10.9.2",
-    "typescript-eslint": "^8.2.0",
+    "typescript-eslint": "^8.31.0",
-    "@typescript-eslint/eslint-plugin": "^8.2.0",
+    "@typescript-eslint/eslint-plugin": "^8.31.0",
-    "typescript": "^5.5.4"
+    "typescript": "^5.8.3"
   }
 }

src/main.ts

@@ -16,7 +16,6 @@ import { join as pathjoin } from 'path';
 
 import {
   exportVariable,
-  getBooleanInput,
   getIDToken,
   getInput,
   setFailed,
@@ -29,6 +28,7 @@ import {
   isEmptyDir,
   isPinnedToHead,
   parseMultilineCSV,
+  parseBoolean,
   parseDuration,
   pinnedToHeadWarning,
 } from '@google-github-actions/actions-utils';
@@ -79,8 +79,8 @@ export async function run(logger: Logger) {
     const oidcTokenAudience =
       getInput(`audience`) || `https://iam.googleapis.com/${workloadIdentityProvider}`;
     const credentialsJSON = getInput(`credentials_json`);
-    const createCredentialsFile = getBooleanInput(`create_credentials_file`);
+    const createCredentialsFile = parseBoolean(getInput(`create_credentials_file`));
-    const exportEnvironmentVariables = getBooleanInput(`export_environment_variables`);
+    const exportEnvironmentVariables = parseBoolean(getInput(`export_environment_variables`));
     const tokenFormat = getInput(`token_format`);
     const delegates = parseMultilineCSV(getInput(`delegates`));
     const universe = getInput(`universe`);
@@ -301,7 +301,7 @@ export async function run(logger: Logger) {
         logger.debug(`Creating id token`);
 
         const idTokenAudience = getInput('id_token_audience', { required: true });
-        const idTokenIncludeEmail = getBooleanInput('id_token_include_email');
+        const idTokenIncludeEmail = parseBoolean(getInput('id_token_include_email'));
 
         // Ensure a service_account was provided if using WIF.
         if (!serviceAccount) {

src/post.ts

@@ -12,21 +12,21 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-import { getBooleanInput, setFailed } from '@actions/core';
+import { getInput, setFailed } from '@actions/core';
 
-import { errorMessage, forceRemove } from '@google-github-actions/actions-utils';
+import { errorMessage, forceRemove, parseBoolean } from '@google-github-actions/actions-utils';
 
 import { Logger } from './logger';
 
 export async function run(logger: Logger) {
   try {
-    const createCredentials = getBooleanInput('create_credentials_file');
+    const createCredentials = parseBoolean(getInput('create_credentials_file'));
     if (!createCredentials) {
       logger.info(`Skipping credential cleanup - "create_credentials_file" is false.`);
       return;
     }
 
-    const cleanupCredentials = getBooleanInput('cleanup_credentials');
+    const cleanupCredentials = parseBoolean(getInput('cleanup_credentials'));
     if (!cleanupCredentials) {
       logger.info(`Skipping credential cleanup - "cleanup_credentials" is false.`);
       return;