name: CD
concurrency: cd

on:
  push:
    tags:
      - v*

permissions: {}

jobs:
  test:
    uses: ./.github/workflows/_test.yml

  build:
    name: Build
    runs-on: ubuntu-latest
    needs: test
    steps:
      - name: Checkout release tag
        uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9
        with:
          ref: ${{ github.event.workflow_run.head_branch }}

      - name: Set up Python
        uses: actions/setup-python@61a6322f88396a6271a6ee3565807d608ecaddd1
        with:
          python-version: '3.x'

      - name: Install build dependency
        run: python3 -m pip install --constraint requirements/build.txt build

      - name: Build binary wheel and source tarball
        run: python3 -m build --sdist --wheel --outdir dist/ .

      - name: Store build artifacts
        uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce
        # NOTE: The GitHub release page contains the release artifacts too, but using
        # GitHub upload/download actions seems robuster: there is no need to compute
        # download URLs and tampering with artifacts between jobs is more limited.
        with:
          name: build-artifacts
          path: dist

  candidate_release:
    name: Release candidate on Github for review
    runs-on: ubuntu-latest
    needs: build
    permissions:
      contents: write # to modify GitHub releases
    outputs:
      release_id: ${{ steps.gh-release.outputs.result }}
    steps:
      - name: Fetch build artifacts
        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a
        with:
          name: build-artifacts
          path: dist

      - id: gh-release
        name: Publish GitHub release draft
        uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410
        with:
          script: |
            fs = require('fs')
            res = await github.rest.repos.createRelease({
              owner: context.repo.owner,
              repo: context.repo.repo,
              name: '${{ github.ref_name }}-rc',
              tag_name: '${{ github.ref }}',
              body: 'Release waiting for review...',
            });

            fs.readdirSync('dist/').forEach(file => {
              github.rest.repos.uploadReleaseAsset({
                owner: context.repo.owner,
                repo: context.repo.repo,
                release_id: res.data.id,
                name: file,
                data: fs.readFileSync('dist/' + file),
              });
            });
            return res.data.id

  release:
    name: Release
    runs-on: ubuntu-latest
    needs: candidate_release
    environment: release
    permissions:
      contents: write # to modify GitHub releases
      id-token: write # to authenticate as Trusted Publisher to pypi.org
    steps:
      - name: Fetch build artifacts
        uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a
        with:
          name: build-artifacts
          path: dist

      - name: Publish binary wheel and source tarball on PyPI
        # Only attempt pypi upload in upstream repository
        if: github.repository == 'theupdateframework/python-tuf'
        uses: pypa/gh-action-pypi-publish@f8c70e705ffc13c3b4d1221169b84f12a75d6ca8

      - name: Finalize GitHub release
        uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410
        with:
          script: |
            github.rest.repos.updateRelease({
              owner: context.repo.owner,
              repo: context.repo.repo,
              release_id: '${{ needs.candidate_release.outputs.release_id }}',
              name: '${{ github.ref_name }}',
              body: 'See [CHANGELOG.md](https://github.com/' +
                     context.repo.owner + '/' + context.repo.repo +
                    '/blob/${{ github.ref_name }}/docs/CHANGELOG.md) for details.'
            })