name: "Charts: Auto-generate docs"

on:
  workflow_dispatch:
  repository_dispatch:
    types: [update-readme-command]
  pull_request:
    paths:
    - 'charts/**/Chart.yaml'
    - 'charts/**/values.yaml'
    - 'charts/**/*.md.gotmpl'
    - 'charts/**/README.md'

concurrency:
  group: ${{ github.head_ref }}-generate-docs
  cancel-in-progress: true

jobs:
  # Branch-based pull request / workflow_dispatch
  generate-readme-trusted:
    if:
      (
        github.event_name == 'pull_request' &&
        github.event.pull_request.head.repo.full_name == github.repository
      ) ||
      github.event_name == 'workflow_dispatch'
    name: Auto-generate chart README
    runs-on: ubuntu-20.04
    steps:
    - name: Get k8s-at-home token
      id: get-app-token
      uses: getsentry/action-github-app-token@v1
      with:
        app_id: ${{ secrets.K8S_AT_HOME_APP_ID }}
        private_key: ${{ secrets.K8S_AT_HOME_APP_PRIVATE_KEY }}

    - name: Checkout
      uses: actions/checkout@v2
      with:
        token: ${{ steps.get-app-token.outputs.token }}
        ref: ${{ github.ref }}
        fetch-depth: 0

    - uses: dorny/paths-filter@v2
      id: filter
      with:
        list-files: shell
        filters: |
          addedOrModified:
            - added|modified: 'charts/**'

    - name: Install Helm
      if: steps.filter.outputs.addedOrModified == 'true'
      uses: azure/setup-helm@v1
      with:
        version: v3.5.3

    - uses: actions/setup-python@v2
      if: steps.filter.outputs.addedOrModified == 'true'
      with:
        python-version: 3.7

    - name: Install helm-docs
      if: steps.filter.outputs.addedOrModified == 'true'
      run: |
        wget -O /tmp/helm-docs.deb  https://github.com/norwoodj/helm-docs/releases/download/v1.5.0/helm-docs_1.5.0_linux_amd64.deb
        sudo dpkg -i /tmp/helm-docs.deb

    - name: Run against 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"
            ./hack/gen-helm-docs.sh "${chart_parts[0]}" "${chart_parts[1]}"
            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: k8s-at-home[bot]
        commit_user_email: <k8s-at-home[bot]@users.noreply.github.com>
        commit_author: k8s-at-home[bot] <k8s-at-home[bot]@users.noreply.github.com>
        file_pattern: charts/**/

 # Repo owner has commented /update-readme on a (fork-based) pull request
  generate-readme-fork:
    if:
      github.event_name == 'repository_dispatch'
    name: Auto-generate chart README for forks
    runs-on: ubuntu-20.04
    steps:
    - name: Checkout
      uses: actions/checkout@v2
      with:
        ref: ${{ github.ref }}
        fetch-depth: 0

    - uses: dorny/paths-filter@v2
      id: filter
      with:
        list-files: shell
        base: master
        filters: |
          addedOrModified:
            - added|modified: 'charts/**'

    - name: Install Helm
      if: steps.filter.outputs.addedOrModified == 'true'
      uses: azure/setup-helm@v1
      with:
        version: v3.5.3

    - uses: actions/setup-python@v2
      if: steps.filter.outputs.addedOrModified == 'true'
      with:
        python-version: 3.7

    - name: Install helm-docs
      if: steps.filter.outputs.addedOrModified == 'true'
      run: |
        wget -O /tmp/helm-docs.deb  https://github.com/norwoodj/helm-docs/releases/download/v1.5.0/helm-docs_1.5.0_linux_amd64.deb
        sudo dpkg -i /tmp/helm-docs.deb

    - name: Run against 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"
            ./hack/gen-helm-docs.sh "${chart_parts[0]}" "${chart_parts[1]}"
            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: k8s-at-home[bot]
        commit_user_email: <k8s-at-home[bot]@users.noreply.github.com>
        commit_author: k8s-at-home[bot] <k8s-at-home[bot]@users.noreply.github.com>
        file_pattern: charts/**/