publish-chart.yaml

name: Build and Publish Docker Image and Helm Chart

on:
  workflow_dispatch:
  push:
    paths-ignore:
      - "**.md"
      - ".github/workflows/*"
      - "!.github/workflows/publish-chart.yaml"
    branches:
      - "main"
  pull_request:
    paths-ignore:
      - "**.md"
      - ".github/workflows/*"
      - "!.github/workflows/publish-chart.yaml"
    tags:
      - "**"

jobs:
  publish-chart:
    runs-on: ubuntu-latest

    # Give explicit permission for GITHUB_TOKEN to write to this repo's gh-pages branch
    permissions:
      contents: write

    steps:
      - name: Decide to publish the chart or not
        id: publish
        shell: python
        run : |
          import os

          publish = ""

          if (
              "${{ github.repository }}" == "2i2c-org/gcp-filestore-backups"
              and "${{ github.event_name }}" == "push"
              and (
                  "${{ github.event.ref }}" == "refs/heads/main"
                  or "${{ github.event.ref }}".startswith("refs/tags/")
              )
          ):
              publish = "true"
              print("Publishing chart")
          
          output_file = os.getenv("GITHUB_OUTPUT")
          with open(output_file, "w") as f:
              f.write(f"publish={publish}\n")

      - name: Checkout repo
        uses: actions/checkout@v4
        with:
          # chartpress requires full history
          fetch-depth: 0

      - name: Login to quay.io
        if: steps.publish.outputs.publish
        uses: docker/login-action@v3
        with:
          registry: quay.io
          username: ${{ secrets.QUAY_USERNAME }}
          password: ${{ secrets.QUAY_PASSWORD }}

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Install dependencies
        run: pip install chartpress

      - name: Configure a git user
        run: |
          git config --global user.email "github-actions@example.local"
          git config --global user.name "GitHub Actions user"

      - name: Build image, push if necessary
        env:
          PUBLISH: ${{ steps.publish.outputs.publish }}
        run: |
          CHARTPRESS_ARGS=""

          if [[ "${PUBLISH}" == "true" ]]; then
            CHARTPRESS_ARGS="--push"
          fi

          chartpress ${CHARTPRESS_ARGS}

      - name: Publish helm chart with chartpress
        if: steps.publish.outputs.publish
        env:
          GITHUB_TOKEN: "${{ github.token }}"
        run: |
          set -eux

          PUBLISH_ARGS="--publish-chart --push"

          if [[ $GITHUB_REF != refs/tags/* ]]; then
              PR_OR_HASH=$(git log -1 --pretty=%h-%B | head -n1 | sed 's/^.*\(#[0-9]*\).*/\1/' | sed 's/^\([0-9a-f]*\)-.*/@\1/')
              LATEST_COMMIT_TITLE=$(git log -1 --pretty=%B | head -n1)
              EXTRA_MESSAGE="${{ github.repository }}${PR_OR_HASH} ${LATEST_COMMIT_TITLE}"

              chartpress $PUBLISH_ARGS --extra-message "${EXTRA_MESSAGE}"
          else
              chartpress $PUBLISH_ARGS --tag "${GITHUB_REF:10}"
          fi

          git --no-pager diff --color