name: CI

on:
  push:
    branches:
      - "master"
  pull_request:

jobs:

  coverage:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - macos-latest
          - windows-latest
        python-version:
          - 2.7

    steps:

      # Get vcpython27 on Windows + Python 2.7, to build netifaces
      # extension.  See https://chocolatey.org/packages/vcpython27 and
      # https://github.com/crazy-max/ghaction-chocolatey
      - name: Install MSVC 9.0 for Python 2.7 [Windows]
        if: matrix.os == 'windows-latest' && matrix.python-version == '2.7'
        uses: crazy-max/ghaction-chocolatey@v1
        with:
          args: install vcpython27

      - name: Check out Tahoe-LAFS sources
        uses: actions/checkout@v2

      - name: Fetch all history for all tags and branches
        run: git fetch --prune --unshallow

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v1
        with:
          python-version: ${{ matrix.python-version }}

      - name: Install Python packages
        run: |
          pip install --upgrade codecov tox setuptools
          pip list

      - name: Display tool versions
        run: python misc/build_helpers/show-tool-versions.py

      - name: Run "tox -e py27-coverage"
        run: tox -e py27-coverage

      - name: Upload eliot.log in case of failure
        uses: actions/upload-artifact@v1
        if: failure()
        with:
          name: eliot.log
          path: eliot.log

      # Upload this job's coverage data to Coveralls.
      - name: "Report Coverage to Coveralls"
        run: |
          pip install coveralls
          python -m coveralls
        env:
          # Some magic value required for some magic reason.
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
          # Help coveralls identify our project.
          COVERALLS_REPO_TOKEN: "JPf16rLB7T2yjgATIxFzTsEgMdN1UNq6o"
          # Every source of coverage reports needs a unique "flag name".
          # Construct one by smashing a few variables from the matrix together
          # here.
          COVERALLS_FLAG_NAME: "run-${{ matrix.os }}-${{ matrix.python-version }}"
          # Mark the data as just one piece of many because we have more than
          # one instance of this job (Windows, macOS) which collects and
          # reports coverage.  This is necessary to cause Coveralls to merge
          # multiple coverage results into a single report.
          COVERALLS_PARALLEL: true

  # Tell Coveralls that we're done reporting coverage data.  Since we're using
  # the "parallel" mode where more than one coverage data file is merged into
  # a single report, we have to tell Coveralls when we've uploaded all of the
  # data files.  This does it.  We make sure it runs last by making it depend
  # on *all* of the coverage-collecting jobs.
  finish-coverage-report:
    # There happens to just be one coverage-collecting job at the moment.  If
    # the coverage reports are broken and someone added more
    # coverage-collecting jobs to this workflow but didn't update this, that's
    # why.
    needs:
      - "coverage"
    runs-on: "ubuntu-latest"
    steps:
      - name: "Check out Tahoe-LAFS sources"
        uses: "actions/checkout@v2"

      - name: "Finish Coveralls Reporting"
        run: |
          # coveralls-python does have a `--finish` option but it doesn't seem
          # to work, at least for us.
          # https://github.com/coveralls-clients/coveralls-python/issues/248
          #
          # But all it does is this simple POST so we can just send it
          # ourselves.  The only hard part is guessing what the POST
          # parameters mean.  And I've done that for you already.
          #
          # Since the build is done I'm going to guess that "done" is a fine
          # value for status.
          #
          # That leaves "build_num".  The coveralls documentation gives some
          # hints about it.  It suggests using $CIRCLE_WORKFLOW_ID if your job
          # is on CircleCI.  CircleCI documentation says this about
          # CIRCLE_WORKFLOW_ID:
          #
          # Observation of the coveralls.io web interface, logs from the
          # coveralls command in action, and experimentation suggests the
          # value for PRs is something more like:
          #
          #    <GIT MERGE COMMIT HASH>-PR-<PR NUM>
          #
          # For branches, it's just the git branch tip hash.

          # For pull requests, refs/pull/<PR NUM>/merge was just checked out
          # by so HEAD will refer to the right revision.  For branches, HEAD
          # is also the tip of the branch.
          REV=$(git rev-parse HEAD)

          # We can get the PR number from the "context".
          #
          # https://docs.github.com/en/free-pro-team@latest/developers/webhooks-and-events/webhook-events-and-payloads#pull_request
          #
          # (via <https://github.community/t/github-ref-is-inconsistent/17728/3>).
          #
          # If this is a pull request, `github.event` is a `pull_request`
          # structure which has `number` right in it.
          #
          # If this is a push, `github.event` is a `push` instead but we only
          # need the revision to construct the build_num.

          PR=${{ github.event.number }}

          if [ "${PR}" = "" ]; then
              BUILD_NUM=$REV
          else
              BUILD_NUM=$REV-PR-$PR
          fi
          REPO_NAME=$GITHUB_REPOSITORY

          curl \
            -k \
            https://coveralls.io/webhook?repo_token=$COVERALLS_REPO_TOKEN \
            -d \
            "payload[build_num]=$BUILD_NUM&payload[status]=done&payload[repo_name]=$REPO_NAME"
        env:
          # Some magic value required for some magic reason.
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
          # Help coveralls identify our project.
          COVERALLS_REPO_TOKEN: "JPf16rLB7T2yjgATIxFzTsEgMdN1UNq6o"

  integration:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - macos-latest
          - windows-latest
        python-version:
          - 2.7

    steps:

      # Get vcpython27 for Windows + Python 2.7, to build netifaces
      # extension.  See https://chocolatey.org/packages/vcpython27 and
      # https://github.com/crazy-max/ghaction-chocolatey
      - name: Install MSVC 9.0 for Python 2.7 [Windows]
        if: matrix.os == 'windows-latest' && matrix.python-version == '2.7'
        uses: crazy-max/ghaction-chocolatey@v1
        with:
          args: install vcpython27

      - name: Install Tor [Ubuntu]
        if: matrix.os == 'ubuntu-latest'
        run: sudo apt install tor

      - name: Install Tor [macOS]
        if: matrix.os == 'macos-latest'
        run: brew install tor

      - name: Install Tor [Windows]
        if: matrix.os == 'windows-latest'
        uses: crazy-max/ghaction-chocolatey@v1
        with:
          args: install tor

      - name: Check out Tahoe-LAFS sources
        uses: actions/checkout@v2

      - name: Fetch all history for all tags and branches
        run: git fetch --prune --unshallow

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v1
        with:
          python-version: ${{ matrix.python-version }}

      - name: Install Python packages
        run: |
          pip install --upgrade tox
          pip list

      - name: Display tool versions
        run: python misc/build_helpers/show-tool-versions.py

      - name: Run "tox -e integration"
        run: tox -e integration

      - name: Upload eliot.log in case of failure
        uses: actions/upload-artifact@v1
        if: failure()
        with:
          name: integration.eliot.json
          path: integration.eliot.json

  packaging:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - macos-latest
          - windows-latest
          - ubuntu-latest
        python-version:
          - 2.7

    steps:

      # Get vcpython27 for Windows + Python 2.7, to build netifaces
      # extension.  See https://chocolatey.org/packages/vcpython27 and
      # https://github.com/crazy-max/ghaction-chocolatey
      - name: Install MSVC 9.0 for Python 2.7 [Windows]
        if: matrix.os == 'windows-latest' && matrix.python-version == '2.7'
        uses: crazy-max/ghaction-chocolatey@v1
        with:
          args: install vcpython27

      - name: Check out Tahoe-LAFS sources
        uses: actions/checkout@v2

      - name: Fetch all history for all tags and branches
        run: git fetch --prune --unshallow

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v1
        with:
          python-version: ${{ matrix.python-version }}

      - name: Install Python packages
        run: |
          pip install --upgrade tox
          pip list

      - name: Display tool versions
        run: python misc/build_helpers/show-tool-versions.py

      - name: Run "tox -e pyinstaller"
        run: tox -e pyinstaller

      # This step is to ensure there are no packaging/import errors.
      - name: Test PyInstaller executable
        run: dist/Tahoe-LAFS/tahoe --version

      - name: Upload PyInstaller package
        uses: actions/upload-artifact@v2
        with:
          name: Tahoe-LAFS-${{ matrix.os }}-Python-${{ matrix.python-version }}
          path: dist/Tahoe-LAFS-*-*.*