name: Open a release PR
on:
  workflow_dispatch:
    inputs:
      crate:
        description: Crate to release
        required: true
        type: choice
        choices:
          - cli
          - lib
          - filterer-globset
          - filterer-ignore
          - filterer-tagged
          - ignore-files
          - project-origins
      version:
        description: Version to release
        required: true
        type: string

jobs:
  make-branch:
    runs-on: ubuntu-latest
    steps:
      - name: Install cargo-release
        uses: baptiste0928/cargo-install@v1
        with:
          crate: cargo-release
          version: "0.21"

      - uses: actions/checkout@v2
        with:
          ref: main
      - name: Make branch "release-${{ inputs.crate }}-${{ inputs.version }}"
        run: git switch -c "release-${{ inputs.crate }}-${{ inputs.version }}"

      - name: Find crate name
        run: |
          set -euxo pipefail
          pushd "crates/${{ inputs.crate }}"
          crate_name=$(head Cargo.toml -n2 | grep name | cut -d '"' -f2)
          echo "crate_name=${crate_name}" >> $GITHUB_ENV
          popd

      - name: Do release
        run: |
          set -euxo pipefail
          git config user.name github-actions
          git config user.email github-actions@github.com
          cargo release \
            --execute \
            --no-push \
            --no-tag \
            --no-publish \
            --no-confirm \
            --verbose \
            --allow-branch "release-${{ inputs.crate }}-${{ inputs.version }}"
            --package "${{ env.crate_name }}" \
            "${{ inputs.version }}"

      - name: Push new branch
        run: |
          set -euxo pipefail
          git push origin "release-${{ inputs.crate }}-${{ inputs.version }}"

  make-pr:
    runs-on: ubuntu-latest
    needs: make-branch
    steps:
      - run: |
          set -euxo pipefail
          title="release: ${{ inputs.crate }} v${{ inputs.version }}"
          body="This is a release PR for **${{ inputs.crate }}** to version **${{ inputs.version }}**."
          if [[ "${{ inputs.crate }}" == "cli" ]]; then
            body="$body

            Upon merging, this will automatically build the CLI and create a GitHub release. You still need to manually publish the cargo crate."
          else
            body="$body

            Upon merging, you will still need to manually publish the cargo crate."
          fi
          body="$body

          \`\`\`
          $ cd crates/${{ inputs.crate }}
          $ cargo publish
          \`\`\`

          To merge this release, review the changes then say:

          \`\`\`
          bors r+
          \`\`\`"

          pr_url=$(gh pr create --title "$title" --body "$body" --base main --head "release-${{ inputs.crate }}-${{ inputs.version }}" --label "release")
          gh pr comment "$pr_url" --body "bors single on\nbors p=10"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}