check-helm-chart-resources.yaml

name: Check helm chart resources
on:
  push:
    branches:
      - main
jobs:
  check-helm-resources-changed:
    runs-on: ubuntu-20.04
    steps:
      - name: Checkout Code
        uses: actions/checkout@v2
        with:
          # Full git history is needed to get the diff
          fetch-depth: 0

      - name: Get Helm Chart resources diff
        id: check-helm-resources-diff
        continue-on-error: true
        run: |
          export DIFF=$(git diff --unified=0 @~..@ chart/values.yaml | grep -E "[0-9]+Mi|[0-9]+m")
          if [ -n "$DIFF" ]; then
            echo "resources-changed=true" >> $GITHUB_OUTPUT
          else
            echo "resources-changed=false" >> $GITHUB_OUTPUT
          fi

      - name: Slack notification
        if: steps.check-helm-resources-diff.outputs.resources-changed == 'true'
        env:
          SLACK_CHANNEL: C06GJA56C5S # selfhosted-internal
        run: |
          curl -F "text=:warning: Hey <!here>! Self Hosted Helm Chart requested resources have changed. Check that the documentation is updated with the new values!" \
           -F "channel=${SLACK_CHANNEL}" \
           -H "Authorization: Bearer ${{ secrets.SLACK_KEY }}" \
           -X POST https://slack.com/api/chat.postMessage