update_app_version.yaml

name: Update AppVersion
on:
  schedule:
    # Run once a day at 08:00
    - cron: '0 8 * * *'
  workflow_dispatch: {}

jobs:
  open_pull_request:
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        include:
          - chart: rasa
            app: rasa
          - chart: rasa-action-server
            app: rasa-x-demo
          - chart: duckling
            app: duckling

    steps:
      - name: Set up Python 3.8 🐍
        uses: actions/setup-python@v2
        with:
          python-version: 3.8

      - name: Checkout repository 🕝
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Get the latest version of an app 🏷
        run: |
          DOCKERHUB_TAGS_URL="https://registry.hub.docker.com/v2/repositories/rasa/${{ matrix.app }}/tags?page_size=10000"
          LATEST_VERSION=$(curl -s ${DOCKERHUB_TAGS_URL} | jq -r '.results[].name' | grep -E '^[0-9.]+$|^[0-9.]+(-r[0-9]+)$' | sort -Vr | head -n1)
          echo "Latest version: ${LATEST_VERSION}"
          echo "LATEST_VERSION=${LATEST_VERSION}" >> $GITHUB_ENV

      - name: Compare the latest version with a chart version ⏯
        run: |
          # Get current version in Chart.yaml using yq
          sudo curl -L https://github.com/mikefarah/yq/releases/download/v4.9.6/yq_linux_amd64 --output /usr/local/bin/yq
          sudo chmod +x /usr/local/bin/yq

          CURRENT_CHART_VERSION=$(yq e .appVersion charts/${{ matrix.chart}}/Chart.yaml)

          echo "Current appVersion: ${CURRENT_CHART_VERSION}"
          echo "Latest version: ${LATEST_VERSION}"

          if [[ "${CURRENT_CHART_VERSION}" == "${LATEST_VERSION}" ]]
          then
            echo "A newer version hasn't been found. Nothing to update."
            echo "CREATE_UPDATE_PR=false" >> $GITHUB_ENV
          else
            echo "A newer version has been found. Bumping it now."
            echo "CREATE_UPDATE_PR=true" >> $GITHUB_ENV
          fi


      - name: Check if duplicate branch exists 🔍
        run: |
          BRANCH_NAME=$(git branch -a | grep -m 1 "bump-${{ matrix.app }}-version-to-${LATEST_VERSION}" || echo "")
          # Set CREATE_UPDATE_PR to false if BRANCH_NAME is not empty ("")
          if [[ ! -z ${BRANCH_NAME} ]]; then
            echo "Found related branch ${BRANCH_NAME}."
            echo "A PR for the ${{ matrix.chart }} chart with appVersion=${LATEST_VERSION} is already created!"
            echo "CREATE_UPDATE_PR=false" >> $GITHUB_ENV
          fi

      - name: Get branch name ✍️
        id: get-branch-name
        if: env.CREATE_UPDATE_PR == 'true'
        run: |
          echo "::set-output name=new_branch::bump-${{ matrix.app }}-version-to-${LATEST_VERSION}-${GITHUB_SHA:0:7}"

      - name: Create new branch 🐣
        uses: peterjgrainger/action-create-branch@v2.0.1
        if: env.CREATE_UPDATE_PR == 'true'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          branch: ${{ steps.get-branch-name.outputs.new_branch }}

      - name: Update Chart YAML containing the latest version 🗂
        if: env.CREATE_UPDATE_PR == 'true'
        run: |
          git config user.name github-actions
          git config user.email github-actions@github.com
          git remote update origin --prune
          git checkout ${{ steps.get-branch-name.outputs.new_branch }}

          diff -Bwb "charts/${{ matrix.chart }}/Chart.yaml" <(yq e '.appVersion = "'${LATEST_VERSION}'"' -i charts/${{ matrix.chart }}/Chart.yaml) > /tmp/tmp_chart.patch || true
          patch charts/${{ matrix.chart }}/Chart.yaml < /tmp/tmp_chart.patch || true

          diff -Bwb "charts/${{ matrix.chart }}/values.yaml" <(yq e '.image.tag = "'${LATEST_VERSION}'"' charts/${{ matrix.chart }}/values.yaml) > /tmp/tmp_values.patch || true
          patch charts/${{ matrix.chart }}/values.yaml < /tmp/tmp_values.patch || true

          docker run --rm --volume "${{ github.workspace }}/charts/${{ matrix.chart }}/:/helm-docs" jnorwood/helm-docs:latest -d -l error > charts/${{ matrix.chart }}/README.md

          git add -u
          git commit -m "other: Bump version to ${LATEST_VERSION}"
          git push origin ${{ steps.get-branch-name.outputs.new_branch }}

      - name: Open pull request ☄️
        uses: repo-sync/pull-request@v2
        if: env.CREATE_UPDATE_PR == 'true'
        with:
          github_token:  ${{ secrets.GITHUB_TOKEN }}
          source_branch: ${{ steps.get-branch-name.outputs.new_branch }}
          destination_branch: main
          pr_title: "Bump the app version for the ${{ matrix.chart }} chart to ${LATEST_VERSION}"
          pr_body: "Bump the app version for the ${{ matrix.chart }} chart to ${LATEST_VERSION}"