name: "Draft new release"

on:
  milestone:
    types: [closed]

jobs:
  draft-new-release:
    name: "Draft a new release"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@c952173edf28a2bd22e1a4926590c1ac39630461
        with:
          ref: 'release'
      - name: Extract version from milestone
        run: |
          VERSION="${{ github.event.milestone.title }}"
          echo "RELEASE_VERSION=${VERSION/v/}" >> $GITHUB_ENV

      - name: Update changelog
        uses: thomaseizinger/keep-a-changelog-new-release@1.1.0
        with:
          version: ${{ env.RELEASE_VERSION }}

      - name: Initialize git config and commit changes
        run: |
          git config user.name "GitHub Actions"
          git config user.email noreply@github.com

      - name: Create Pull Request
        uses: peter-evans/create-pull-request@c7f493a8000b8aeb17a1332e326ba76b57cb83eb
        with:
          author: GitHub Actions <noreply@github.com>
          base: release
          body: This is an automated pull request to bump the changelog for the v${{ env.RELEASE_VERSION }} release.
          branch: release-${{ env.RELEASE_VERSION }}
          commit-message: "CHANGELOG: bump for ${{ env.RELEASE_VERSION }}"
          draft: true
          title: Release v${{ env.RELEASE_VERSION }}
          token: ${{ secrets.GITHUB_TOKEN }}