chore: Use updater action to manage Danger JS version (#131)

* feat(danger): Use updater action to manage Danger JS version

Extract the Danger JS version to a properties file and use the updater
action to automatically check for and update to new versions.

Changes:
- Extract version to danger/danger.properties
- Read version from properties file in danger action
- Add workflow to automatically update Danger JS weekly

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

* chore: Remove unnecessary whitespace in danger.properties

---------

Co-authored-by: Claude <[email protected]>

Author: vaind

.github/workflows/update-deps.yml

@@ -0,0 +1,21 @@
+name: Update Danger JS
+
+on:
+  workflow_dispatch:
+  schedule:
+    # Run weekly on Mondays at 8:00 UTC
+    - cron: '0 8 * * 1'
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  danger:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: getsentry/github-workflows/updater@main
+        with:
+          path: danger/danger.properties
+          name: Danger JS
+          api-token: ${{ secrets.GITHUB_TOKEN }}

danger/action.yml

@@ -22,6 +22,12 @@ runs:
         token: ${{ inputs.api-token }}
         fetch-depth: 0
 
+    # Read the Danger version from the properties file
+    - name: Get Danger version
+      id: config
+      shell: pwsh
+      run: Get-Content '${{ github.action_path }}/danger.properties' | Tee-Object $env:GITHUB_OUTPUT -Append
+
     # Using a pre-built docker image in GitHub container registry instead of NPM to reduce possible attack vectors.
     - name: Run DangerJS
       id: danger
@@ -36,5 +42,5 @@ runs:
           -e "INPUT_ARGS" -e "GITHUB_JOB" -e "GITHUB_REF" -e "GITHUB_SHA" -e "GITHUB_REPOSITORY" -e "GITHUB_REPOSITORY_OWNER" -e "GITHUB_RUN_ID" -e "GITHUB_RUN_NUMBER" -e "GITHUB_RETENTION_DAYS" -e "GITHUB_RUN_ATTEMPT" -e "GITHUB_ACTOR" -e "GITHUB_TRIGGERING_ACTOR" -e "GITHUB_WORKFLOW" -e "GITHUB_HEAD_REF" -e "GITHUB_BASE_REF" -e "GITHUB_EVENT_NAME" -e "GITHUB_SERVER_URL" -e "GITHUB_API_URL" -e "GITHUB_GRAPHQL_URL" -e "GITHUB_REF_NAME" -e "GITHUB_REF_PROTECTED" -e "GITHUB_REF_TYPE" -e "GITHUB_WORKSPACE" -e "GITHUB_ACTION" -e "GITHUB_EVENT_PATH" -e "GITHUB_ACTION_REPOSITORY" -e "GITHUB_ACTION_REF" -e "GITHUB_PATH" -e "GITHUB_ENV" -e "GITHUB_STEP_SUMMARY" -e "RUNNER_OS" -e "RUNNER_ARCH" -e "RUNNER_NAME" -e "RUNNER_TOOL_CACHE" -e "RUNNER_TEMP" -e "RUNNER_WORKSPACE" -e "ACTIONS_RUNTIME_URL" -e "ACTIONS_RUNTIME_TOKEN" -e "ACTIONS_CACHE_URL" -e GITHUB_ACTIONS=true -e CI=true \
           -e GITHUB_TOKEN="${{ inputs.api-token }}" \
           -e DANGER_DISABLE_TRANSPILATION="true" \
-          ghcr.io/danger/danger-js:11.3.1 \
-          --failOnErrors --dangerfile ${{ github.action_path }}/dangerfile.js
+          ghcr.io/danger/danger-js:${{ steps.config.outputs.version }} \
+          --failOnErrors --dangerfile ${{ github.action_path }}/dangerfile.js

danger/danger.properties

@@ -0,0 +1,2 @@
+version=11.3.1
+repo=https://github.com/danger/danger-js