name: Prepare Patch Release
on:
  workflow_dispatch:

jobs:
  prepare-patch-release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          ref: ${{ github.ref_name }}

      - name: Set versions
        id: set-versions
        run: |
          v=$(grep -Eo "[0-9]+.[0-9]+.[0-9]+" version.gradle.kts | head -1)
          if [[ $v =~ ([0-9]+.[0-9]+).([0-9]+) ]]; then
            major_minor="${BASH_REMATCH[1]}"
            patch="${BASH_REMATCH[2]}"
          else
            echo "unexpected version: $v"
            exit 1
          fi
          echo "::set-output name=release-version::$major_minor.$((patch + 1))"
          echo "::set-output name=prior-version::$v"

      - name: Bump version
        run: |
          .github/scripts/update-versions.sh "${{ steps.set-versions.outputs.prior-version }}" "${{ steps.set-versions.outputs.prior-version }}-alpha" "${{ steps.set-versions.outputs.release-version }}" "${{ steps.set-versions.outputs.release-version }}-alpha"

      - name: Bump download link version
        run: |
          sed -Ei "s,https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v${{ steps.set-versions.outputs.prior-version }}/,https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases/download/v${{ steps.set-versions.outputs.release-version }}/," README.md

      - name: Setup git name
        run: |
          git config user.name opentelemetry-java-bot
          git config user.email 97938252+opentelemetry-java-bot@users.noreply.github.com

      - name: Create pull request
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          msg="Prepare patch release ${{ steps.set-versions.outputs.release-version }}"
          git add -u
          git commit -m "$msg"
          git push origin HEAD:prepare-patch-release-${{ steps.set-versions.outputs.release-version }}
          gh pr create --title "$msg" \
                       --body "$msg" \
                       --head prepare-patch-release-${{ steps.set-versions.outputs.release-version }} \
                       --base ${{ github.ref_name }}
