name: "Charts: Update Readme"

concurrency: update-readme

on:
  workflow_dispatch:
  pull_request:
    paths:
      - "charts/**"

jobs:
  get-branch:
    name: Get branch
    runs-on: ubuntu-20.04
    outputs:
      branch: ${{ steps.branch-name.outputs.current_branch }}

    steps:
      - name: Get branch name
        id: branch-name
        uses: tj-actions/branch-names@v5.1

  generate-readme:
    name: Update changelog
    runs-on: ubuntu-20.04
    needs:
      - get-branch

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

      - uses: dorny/paths-filter@v2
        id: filter
        with:
          base: ${{ github.ref }}
          list-files: shell
          filters: |
            addedOrModified:
              - added|modified: 'charts/**'

      - name: Annotate Charts.yaml for Renovate
        if: steps.filter.outputs.addedOrModified == 'true' && startsWith(needs.get-branch.outputs.branch, 'renovate/')
        run: |
          CHARTS=()
          PATHS=(${{ steps.filter.outputs.addedOrModified_files }})
          # Get only the chart paths
          for i in "${PATHS[@]}"
          do
              IFS='/' read -r -a path_parts <<< "$i"
              CHARTS+=("${path_parts[1]}/${path_parts[2]}")
          done

          # Remove duplicates
          CHARTS=( `for i in ${CHARTS[@]}; do echo $i; done | sort -u` )

          for i in "${CHARTS[@]}"
          do
              echo "Updating CHANGELOG for chart ${i}"
              IFS='/' read -r -a chart_parts <<< "$i"
              if [ -f "charts/${chart_parts[0]}"/"${chart_parts[1]}/Chart.yaml" ]; then
                ./hack/renovate-releasenotes.sh "charts/${chart_parts[0]}"/"${chart_parts[1]}"
              fi
              echo ""
          done

      - name: Install Helm
        if: steps.filter.outputs.addedOrModified == 'true'
        uses: azure/setup-helm@v1
        with:
          version: v3.6.3

      - uses: actions/setup-python@v2
        if: steps.filter.outputs.addedOrModified == 'true'
        with:
          python-version: 3.9

      - name: Install helm-docs
        if: steps.filter.outputs.addedOrModified == 'true'
        run: |
          wget -O /tmp/helm-docs.deb  https://github.com/k8s-at-home/helm-docs/releases/download/v0.1.1/helm-docs_0.1.1_Linux_x86_64.deb
          sudo dpkg -i /tmp/helm-docs.deb

      - name: Generate README for changed charts
        if: steps.filter.outputs.addedOrModified == 'true'
        run: |
          CHARTS=()
          PATHS=(${{ steps.filter.outputs.addedOrModified_files }})
          # Get only the chart paths
          for i in "${PATHS[@]}"
          do
              IFS='/' read -r -a path_parts <<< "$i"
              CHARTS+=("${path_parts[1]}/${path_parts[2]}")
          done

          # Remove duplicates
          CHARTS=( `for i in ${CHARTS[@]}; do echo $i; done | sort -u` )

          for i in "${CHARTS[@]}"
          do
              echo "Rendering README for chart ${i}"
              IFS='/' read -r -a chart_parts <<< "$i"
              if [ -f "charts/${chart_parts[0]}"/"${chart_parts[1]}/Chart.yaml" ]; then
                ./hack/gen-helm-docs.sh "${chart_parts[0]}" "${chart_parts[1]}"
              fi
              echo ""
          done

      - name: Create commit
        if: steps.filter.outputs.addedOrModified == 'true'
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          commit_message: Auto-generate chart README

          commit_user_name: ${{ github.actor }}
          commit_user_email: ${{ github.actor }}@users.noreply.github.com

          file_pattern: charts/**/