name: Publish
on:
  push:
    tags:
      - '*'
  # When a new version of Python is released, the workflow can be run manually to
  # publish new wheels for the existing tag.
  workflow_dispatch:
    inputs:
      tag:
        description: 'git tag to check out and upload to'
        required: true
      python:
        description: 'Python version, like "cp311"'
        required: true
jobs:
  sdist:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
        with:
          ref: ${{ inputs.tag }}
      - uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435
        with:
          python-version: '3.x'
          cache: 'pip'
          cache-dependency-path: 'requirements/*.txt'
      - run: pip install -r requirements/build.txt
      # Use the commit date instead of the current date during the build.
      - run: echo "SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct)" >> $GITHUB_ENV
      - run: python -m build --sdist
      - uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce
        with:
          path: ./dist
        # The sdist is not needed on new Python version builds. However, this job must
        # present in the run for the hash job, so only the upload is skipped.
        if: github.event_name == 'push'
  wheels:
    name: wheels / ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
    steps:
      - uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3
      - run: echo "SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct)" >> $GITHUB_ENV
      - name: Set up QEMU
        if: runner.os == 'Linux'
        uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18
        with:
          platforms: arm64
      - uses: joerick/cibuildwheel@02ad79a31bf7aa0eee07f690509048d2fb9fd445
        env:
          # For workflow_dispatch, only build the new Python version.
          CIBW_BUILD: "${{ inputs.python && format('{0}-*', inputs.python) || null }}"
          CIBW_SKIP: 'pp*'
          CIBW_ARCHS_LINUX: auto aarch64
          CIBW_ARCHS_MACOS: auto universal2
          CIBW_BUILD_FRONTEND: build
          CIBW_ENVIRONMENT_PASS_LINUX: SOURCE_DATE_EPOCH
      - uses: actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce
        with:
          path: ./wheelhouse
  hash:
    # Generate hashes for the sdist and wheels, used later for provenance.
    needs: ['sdist', 'wheels']
    runs-on: ubuntu-latest
    outputs:
      hash: ${{ steps.hash.outputs.hash }}
    steps:
      - uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a
      - name: generate hash
        id: hash
        run: cd artifact && echo "hash=$(sha256sum * | base64 -w0)" >> $GITHUB_OUTPUT
  provenance:
    needs: ['hash']
    permissions:
      actions: read
      id-token: write
      contents: write
    # Can't pin with hash due to how this workflow works.
    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@v1.5.0
    with:
      base64-subjects: ${{ needs.hash.outputs.hash }}
      # When building more wheels, use the Python version as the provenance file name.
      provenance-name: ${{ inputs.python && format('{0}.intoto.jsonl', inputs.python) || null }}
  create-release:
    # Upload the sdist, wheels, and provenance to a GitHub release. They remain
    # available as build artifacts for a while as well.
    needs: ['provenance']
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a
      # When building a new tag, create a new draft release.
      - if: github.event_name == 'push'
        name: create release
        run: >
          gh release create --draft --repo ${{ github.repository }}
          ${{ inputs.tag || github.ref_name }}
          *.intoto.jsonl/* artifact/*
        env:
          GH_TOKEN: ${{ github.token }}
      # When running manually, update the existing release with more files.
      - if: github.event_name == 'workflow_dispatch'
        name: update release
        run: >
          gh release upload --repo ${{ github.repository }}
          ${{ inputs.tag || github.ref_name }}
          *.intoto.jsonl/* artifact/*
        env:
          GH_TOKEN: ${{ github.token }}
  publish-pypi:
    needs: ['provenance']
    # Wait for approval before attempting to upload to PyPI. This allows reviewing the
    # files in the draft release.
    environment: 'publish'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/download-artifact@9bc31d5ccc31df68ecc42ccf4149144866c47d8a
      # Try uploading to Test PyPI first, in case something fails.
      - uses: pypa/gh-action-pypi-publish@0bf742be3ebe032c25dd15117957dc15d0cfc38d
        with:
          password: ${{ secrets.TEST_PYPI_TOKEN }}
          repository_url: https://test.pypi.org/legacy/
          packages_dir: artifact/
          skip_existing: true
      - uses: pypa/gh-action-pypi-publish@0bf742be3ebe032c25dd15117957dc15d0cfc38d
        with:
          password: ${{ secrets.PYPI_TOKEN }}
          packages_dir: artifact/
          skip_existing: true