name: Helm

on:
  push:
    branches:
      - main
      - legacy

jobs:

  changes:
    runs-on: ubuntu-latest
    if: |
      (github.repository == 'kubernetes/ingress-nginx')
    outputs:
      docs: ${{ steps.filter.outputs.docs }}
      charts: ${{ steps.filter.outputs.charts }}

    steps:

      - name: Checkout
        uses: actions/checkout@v2

      - uses: dorny/paths-filter@v2
        id: filter
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          filters: |
            charts:
              - 'charts/ingress-nginx/Chart.yaml'
              - 'charts/ingress-nginx/**/*'

  chart:
    name: Release Chart
    runs-on: ubuntu-latest

    permissions:
      contents: write # needed to write releases

    needs:
      - changes
    if: |
      (github.repository == 'kubernetes/ingress-nginx') &&
      (needs.changes.outputs.charts == 'true')

    steps:

      - name: Checkout master
        uses: actions/checkout@v2
        with:
          # Fetch entire history. Required for chart-releaser; see https://github.com/helm/chart-releaser-action/issues/13#issuecomment-602063896
          fetch-depth: 0

      - name: Setup
        shell: bash
        run: |
          git config --global user.name "$GITHUB_ACTOR"
          git config --global user.email "$GITHUB_ACTOR@users.noreply.github.com"
      
      - name: Set up Go 1.17
        id: go
        uses: actions/setup-go@v2
        with:
          go-version: 1.17

      - name: Run helm-docs
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
        run: |
          cd ${GITHUB_WORKSPACE}
          GOBIN=$PWD GO111MODULE=on go install github.com/norwoodj/helm-docs/cmd/helm-docs@v1.6.0
          ./helm-docs --chart-search-root=${GITHUB_WORKSPACE}/charts
          DIFF=$(git diff ${GITHUB_WORKSPACE}/charts/ingress-nginx/README.md)
          if [ ! -z "$DIFF" ]; then
             git add ${GITHUB_WORKSPACE}/charts/ingress-nginx/README.md
             git commit -m "Update helm README"
             git push --force https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git main  
          fi
          rm ./helm-docs


      - name: Run chart-releaser
        uses: helm/chart-releaser-action@v1.2.1
        env:
          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
          CR_RELEASE_NAME_TEMPLATE: "helm-chart-{{ .Version }}"
        with:
          charts_dir: charts