create-release.yml

name: Create Release

on:
  push:
    branches:
    - main

concurrency: release

jobs:
  smoke:
    name: Smoke Test
    runs-on: ubuntu-22.04
    outputs:
      release_notes: ${{ steps.notes.outputs.body }}
    steps:
    - name: Setup Go
      uses: actions/setup-go@v3
      with:
        go-version: 'stable'

    - name: Checkout
      uses: actions/checkout@v3

    - name: Get pack version
      id: pack-version
      run: |
        version=$(jq -r .pack "scripts/.util/tools.json")
        echo "version=${version#v}" >> "$GITHUB_OUTPUT"

    - name: Install Global Pack
      uses: buildpacks/github-actions/setup-pack@main
      with:
        pack-version: ${{ steps.pack-version.outputs.version }}

    - name: Run Smoke Tests
      run: ./scripts/smoke.sh --name builder

    - name: Generate Release Notes
      id: notes
      run: |
        notes="$(pack inspect-builder builder | grep -v 'Inspecting builder' \
          | grep -v 'REMOTE:' \
          | grep -v 'LOCAL:' \
          | grep -v '\(not present\)' \
          | grep -v 'Warning' \
          | sed -e '/./,$!d' \
          | awk -F, '{printf "%s\\n", $0}')"
        echo "body=${notes}" >> "$GITHUB_OUTPUT"

  release:
    name: Release
    runs-on: ubuntu-22.04
    needs: smoke
    steps:
    - name: Checkout With History
      uses: actions/checkout@v3
      with:
        fetch-depth: 0  # gets full history

    - name: Compare With Previous Release
      id: compare_previous_release
      run: |
        if [ -z "$(git diff $(git describe --tags --abbrev=0) -- builder.toml)" ]
        then
          echo "builder_changes=false" >> "$GITHUB_OUTPUT"
        else
          echo "builder_changes=true" >> "$GITHUB_OUTPUT"
        fi

    - name: Publish Release
      id: publish
      if: ${{ steps.compare_previous_release.outputs.builder_changes == 'true' }}
      uses: release-drafter/release-drafter@v5
      with:
        config-name: release-drafter-config.yml
        publish: true
      env:
        GITHUB_TOKEN: ${{ secrets.PAKETO_BOT_GITHUB_TOKEN }}

    - name: Update Release Notes
      if: ${{ steps.compare_previous_release.outputs.builder_changes == 'true' }}
      run: |
        set -euo pipefail
        shopt -s inherit_errexit

        payload="{\"body\" : \"\`\`\`\n${RELEASE_BODY}\n\`\`\`\"}"

        curl --fail \
          -X PATCH \
          -H "Accept: application/vnd.github.v3+json" \
          -H "Authorization: token ${GITHUB_TOKEN}" \
          "https://api.github.com/repos/${GITHUB_REPOSITORY}/releases/${RELEASE_ID}" \
          -d "${payload}"
      env:
        RELEASE_ID: ${{ steps.publish.outputs.id }}
        RELEASE_BODY: ${{ needs.smoke.outputs.release_notes }}
        GITHUB_TOKEN: ${{ secrets.PAKETO_BOT_GITHUB_TOKEN }}

  failure:
    name: Alert on Failure
    runs-on: ubuntu-22.04
    needs: [ smoke, release ]
    if: ${{ always() && needs.smoke.result == 'failure' ||  needs.release.result == 'failure' }}
    steps:
    - name: File Failure Alert Issue
      uses: paketo-buildpacks/github-config/actions/issue/file@main
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
        repo: ${{ github.repository }}
        label: "failure:release"
        comment_if_exists: true
        issue_title: "Failure: Create Release workflow"
        issue_body: |
          Create Release workflow [failed](https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}).
        comment_body: |
          Another failure occurred: https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}