push-tag.yml

# Copyright Broadcom, Inc. All Rights Reserved.
# SPDX-License-Identifier: APACHE-2.0

name: '[CI/CD] Push tag'
on: # rebuild any PRs and main branch changes
  push:
    branches:
      - main
    paths:
      - 'bitnami/**'
      - '!**.md'
# Remove all permissions by default.
permissions: {}
jobs:
  get-chart:
    runs-on: ubuntu-latest
    name: 'Get modified charts'
    permissions:
      contents: read
    outputs:
      chart: ${{ steps.get-chart.outputs.chart }}
      result: ${{ steps.get-chart.outputs.result }}
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
        with:
          path: charts
          fetch-depth: 2 # to be able to obtain files changed in the latest commit
      - id: get-chart
        name: 'Get modified charts'
        run: |
          cd charts
          files_changed="$(git show --pretty="" --name-only)"
          # Adding || true to avoid "Process exited with code 1" errors
          charts_dirs_changed="$(echo "$files_changed" | xargs dirname | grep -o "bitnami/[^/]*" | sort | uniq || true)"
          # Using grep -c as a better alternative to wc -l when dealing with empty strings."
          num_charts_changed="$(echo "$charts_dirs_changed" | grep -c "bitnami" || true)"
          num_version_bumps="$(echo "$files_changed" | grep  "bitnami/[^/]*/Chart.yaml" | xargs git show | grep -c "+version" || true)"

          if [[ "$num_charts_changed" -ne "$num_version_bumps" ]]; then
            # Changes done in charts but version not bumped -> ERROR
            charts_changed_str="$(echo ${charts_dirs_changed[@]})"
            echo "error=Detected changes in charts without version bump in Chart.yaml. Charts changed: ${num_charts_changed} ${charts_changed_str}. Version bumps detected: ${num_version_bumps}" >> $GITHUB_OUTPUT
            echo "result=fail" >> $GITHUB_OUTPUT
          elif [[ "$num_charts_changed" -eq "1" ]]; then
            # Changes done in only one chart -> OK
            chart_name=$(echo "$charts_dirs_changed" | sed "s|bitnami/||g")
            echo "chart=${chart_name}" >> $GITHUB_OUTPUT
            echo "result=ok" >> $GITHUB_OUTPUT
          else
            # Changes done in more than chart -> FAIL
            charts_changed_str="$(echo ${charts_dirs_changed[@]})"
            echo "error=Changes detected in more than one chart directory: ${charts_changed_str}. The publish process will be stopped. Please create different commits for each chart." >> $GITHUB_OUTPUT
            echo "result=fail" >> $GITHUB_OUTPUT
          fi
      - id: show-error
        name: 'Show error'
        if: ${{ steps.get-chart.outputs.result == 'fail' }}
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea
        with:
          script: |
              core.setFailed('${{ steps.get-chart.outputs.error }}')
  push-tag:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    needs:
      - get-chart
    name: Push tag
    if: ${{ needs.get-chart.outputs.result == 'ok' }}
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
        with:
          path: charts
          fetch-depth: 2 # to be able to obtain files changed in the latest commit
      - id: push-tag
        name: 'Push tag'
        env:
          CHART: ${{ needs.get-chart.outputs.chart }}
        run: |
          cd charts
          # Get chart version and list of tags
          chart_version="$(yq e '.version' bitnami/${CHART}/Chart.yaml)"
          git fetch --tags
          # If the tag does not exist, create and push it (this allows re-executing the job)
          if ! git tag | grep ${CHART}/${chart_version}; then
            git tag ${CHART}/${chart_version}
            git push --tags
          fi