update-readme.yml

name: Update README
on: workflow_dispatch

permissions:
  contents: write
  pull-requests: write

jobs:
  update-readme:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Get chart index.yaml files
      run: |
       wget https://github.com/mikefarah/yq/releases/download/v4.25.1/yq_linux_amd64 -O /usr/bin/yq && chmod +x /usr/bin/yq
       wget -O latest.index.yaml https://releases.rancher.com/server-charts/latest/index.yaml
       wget -O stable.index.yaml https://releases.rancher.com/server-charts/stable/index.yaml
    - name: Update README file
      run: |
       tmpfile=$(mktemp)
       unset latest
       unset stable
       for rancher_major_minor in 2.7 2.6 2.5; do
        latest2x=$(yq  ".entries.rancher[].appVersion | select(test(\"^v${rancher_major_minor}\") and select(. != \"*-rc*\"))" 'latest.index.yaml' | head -1)
        stable2x=$(yq  ".entries.rancher[].appVersion | select(test(\"^v${rancher_major_minor}\") and select(. != \"*-rc*\"))" 'stable.index.yaml' | head -1)
        [[ -z ${latest2x} ]] && [[ -z ${stable2x} ]] && continue
        echo "* v${rancher_major_minor}" >> $tmpfile
        if [[ -n ${latest2x} ]]; then
          if [[ -n ${latest} ]]; then
            echo "  * Latest - ${latest2x} - \`rancher/rancher:${latest2x}\` - Read the full release [notes](https://github.com/rancher/rancher/releases/tag/${latest2x})." >> $tmpfile
          else
            echo "  * Latest - ${latest2x} - \`rancher/rancher:${latest2x}\` / \`rancher/rancher:latest\` - Read the full release [notes](https://github.com/rancher/rancher/releases/tag/${latest2x})." >> $tmpfile
          fi
        fi
        if [[ -n ${stable2x} ]]; then
          if [[ -n ${stable} ]]; then
            echo "  * Stable - ${stable2x} - \`rancher/rancher:${stable2x}\` - Read the full release [notes](https://github.com/rancher/rancher/releases/tag/${stable2x})." >> $tmpfile
          else
            echo "  * Stable - ${stable2x} - \`rancher/rancher:${stable2x}\` / \`rancher/rancher:stable\` - Read the full release [notes](https://github.com/rancher/rancher/releases/tag/${stable2x})." >> $tmpfile
          fi
        fi
        latest=${latest2x}
        stable=${stable2x}
       done
       sed -e '/## Latest Release/r '"$tmpfile"'' -e 's/CURRENTYEAR/'"$(date +%Y)"'/g' README-template.md > README.md
    - name: Check for repository changes
      run: |
        if git diff --name-only --exit-code; then
          echo "No changes found in repository after updating README"
          echo "changes_exist=false" >> $GITHUB_ENV
        else
          echo "Changes found in repository after updating README:"
          git diff --name-only
          echo "changes_exist=true" >> $GITHUB_ENV
        fi
    - name: Create branch, commit and push
      if: ${{ env.changes_exist == 'true' }}
      id: branch
      run: |
        BRANCH="githubaction-update-readme-$(date +%Y-%m-%d-%H-%M-%S)"
        echo "::set-output name=branch::$BRANCH"
        git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
        git config --global user.name "github-actions[bot]"
        git checkout -b "$BRANCH"
        git commit -a -m "update README with latest/stable"
        git push origin "$BRANCH"
    - name: Create Pull Request
      if: ${{ env.changes_exist == 'true' }}
      id: cpr
      env:
        SOURCE_BRANCH: ${{ steps.branch.outputs.branch }}
      uses: actions/github-script@v5.0.0
      with:
        github-token: ${{ secrets.GITHUB_TOKEN }}
        script: |
          let body = 'Auto-generated by GitHub Actions'

          const { data: pr } = await github.rest.pulls.create({
            title: `[${{ github.ref_name }}] update README with latest/stable`,
            body: body,
            owner: context.repo.owner,
            repo: context.repo.repo,
            base: "${{ github.ref_name }}",
            head: `${ process.env.SOURCE_BRANCH }`
          });
          await github.rest.issues.addLabels({
            ...context.repo,
            issue_number: pr.number,
            labels: ["status/auto-created"],
          });
          console.log('Created new pull request');
          return pr.html_url;
    - name: Check outputs
      if: ${{ env.changes_exist == 'true' }}
      run: |
        echo "Pull Request URL - ${{ steps.cpr.outputs.result }}"