readme-versions.yml

name: README Versions

on:
  pull_request:
    types: [opened, reopened, synchronize]
    branches: [main]
    paths:
      - Dockerfile

jobs:
  readme:
    name: Update README versions
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Checkout PR
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
        with:
          ref: ${{ github.event.pull_request.head.ref }}

      - name: Parse Caddy version
        id: caddy
        shell: bash
        run: |
          CADDY_VERSION=$(grep -m 1 -Eo 'caddy:[0-9]+\.[0-9]+\.[0-9]+' Dockerfile \
            | sed -E 's/.+:([0-9]+\.[0-9]+\.[0-9]+)(.+)?$/\1/g')
          MAJOR=$(echo "$CADDY_VERSION" | cut -d . -f 1)
          MINOR=$(echo "$CADDY_VERSION" | cut -d . -f 2)
          PATCH=$(echo "$CADDY_VERSION" | cut -d . -f 3)
          cat <<EOF | tee -a "$GITHUB_OUTPUT"
          version=$CADDY_VERSION
          major=$MAJOR
          minor=$MINOR
          patch=$PATCH
          EOF

      - name: Update README
        shell: bash
        env:
          VERSION: ${{ steps.caddy.outputs.version }}
          MAJOR: ${{ steps.caddy.outputs.major }}
          MINOR: ${{ steps.caddy.outputs.minor }}
          PATCH: ${{ steps.caddy.outputs.patch }}
        run: |
          cat > tags.md <<EOF
          - [\`latest\`]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/tree/v$VERSION)
          - [\`$VERSION\`]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/tree/v$VERSION)
          - [\`$MAJOR.$MINOR\`]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/tree/v$MAJOR.$MINOR)
          - [\`$MAJOR\`]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/tree/v$MAJOR)
          EOF
          awk '
              BEGIN{p=1}
              $1=="<!--START-TAGS-->"{p=0;print;next}
              $1=="<!--END-TAGS-->"{system("cat tags.md");p=1}
              p
          ' README.md > README.md.new
          mv README.md.new README.md
          rm tags.md

      - name: Check if README was updated
        id: changed
        shell: bash
        run: |
          if git diff-index --quiet HEAD ; then
            echo "changed=false" | tee -a "$GITHUB_OUTPUT"
          else
            echo "changed=true" | tee -a "$GITHUB_OUTPUT"
          fi

      - name: Push changes back to PR
        if: steps.changed.outputs.changed == 'true'
        uses: iarekylew00t/verified-bot-commit@b736aa5032e8208bb405e273908a1b90f72c0d48 # v1.0.14
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          message: "docs: Updating README for v${{ steps.caddy.outputs.version }}"
          files: |
            README.md