.github/workflows/build.yml

name: Build wheels

on: [push, pull_request, workflow_dispatch]

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  generate_wheels_matrix:
    name: Generate wheels matrix
    runs-on: ubuntu-latest
    outputs:
      include: ${{ steps.set-matrix.outputs.include }}
    steps:
      - uses: actions/checkout@v4
      - name: Checkout mypy
        shell: bash
        # use a commit hash checked into a file to get the mypy revision to build.
        # submodules prove problematic since .git is outside cibuildwheel's manylinux container
        run: |
          git clone https://github.com/python/mypy.git --recurse-submodules
          git -C mypy checkout $(cat mypy_commit)
      - name: Install cibuildwheel and pypyp
        run: |
          pipx install cibuildwheel==3.2.1
          pipx install pypyp==1.3.0
      - id: set-matrix
        run: |
          MATRIX=$(
            {
              cibuildwheel --config-file=cibuildwheel.toml --print-build-identifiers --platform linux --archs x86_64 mypy \
              | pyp 'json.dumps({"only": x, "os": "ubuntu-latest"})' \
              && cibuildwheel --config-file=cibuildwheel.toml --print-build-identifiers --platform linux --archs aarch64 mypy \
              | pyp 'json.dumps({"only": x, "os": "ubuntu-24.04-arm"})' \
              && cibuildwheel --config-file=cibuildwheel.toml --print-build-identifiers --platform macos mypy \
              | pyp 'json.dumps({"only": x, "os": "macos-latest"})' \
              && cibuildwheel --config-file=cibuildwheel.toml --print-build-identifiers --platform windows mypy \
              | pyp 'json.dumps({"only": x, "os": "windows-latest"})'
            } | pyp 'json.dumps(list(map(json.loads, lines)))'
          )
          echo "include=$MATRIX" | tee -a $GITHUB_OUTPUT
        env:
          CIBW_ARCHS_MACOS: x86_64 arm64
          CIBW_ARCHS_WINDOWS: AMD64

  build_wheels:
    name: Build ${{ matrix.only }}
    needs: generate_wheels_matrix
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include: ${{ fromJson(needs.generate_wheels_matrix.outputs.include) }}

    steps:
      - uses: actions/checkout@v4
      - name: Checkout mypy
        shell: bash
        # use a commit hash checked into a file to get the mypy revision to build.
        # submodules prove problematic since .git is outside cibuildwheel's manylinux container
        run: |
          git clone https://github.com/python/mypy.git --recurse-submodules
          git -C mypy checkout $(cat mypy_commit)

      - uses: pypa/cibuildwheel@v3.2.1
        with:
          config-file: cibuildwheel.toml
          package-dir: mypy
          only: ${{ matrix.only }}

      - uses: actions/upload-artifact@v4
        with:
          name: dist-${{ matrix.only }}
          path: ./wheelhouse/*.whl
          overwrite: true

  build_sdist_python_wheel:
    name: sdist and python wheel
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        name: Install Python
        with:
          python-version: "3.9"
      - name: Checkout mypy
        shell: bash
        run: |
          COMMIT=$(cat mypy_commit)
          git clone https://github.com/python/mypy.git
          cd mypy
          git checkout $COMMIT
          git submodule update --init --recursive
      - name: Run check-manifest
        run: |
          cd mypy
          pip install check-manifest
          check-manifest -v
      - name: Build sdist and wheel
        run: |
          cd mypy
          pip install --upgrade setuptools build
          python -m build
      - uses: actions/upload-artifact@v4
        with:
          name: dist-sdist_python_wheel
          path: |
            mypy/dist/*.whl
            mypy/dist/*.tar.gz
          overwrite: true

  build_wasm_wheel:
    # temporarily disable until we figure out how to build with librt.
    if: false
    name: WASM wheel for 3.10
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        name: Install Python
        with:
          python-version: "3.10"
      - uses: actions/setup-node@v4
        with:
          node-version: 18.5.0 # pyodide tests with this version
      - name: Install emscripten
        id: install_emsdk
        run: |
          git clone https://github.com/emscripten-core/emsdk.git
          cd emsdk
          # Version of Emscripten pyodide 0.21.0 uses.
          ./emsdk install 3.1.14
          ./emsdk activate 3.1.14
          # We need the location of emscripten when we use pyodide-build
          echo "EMSCRIPTEN_DIR=$(pwd)" >> $GITHUB_OUTPUT
      - name: Checkout mypy
        shell: bash
        run: |
          COMMIT=$(cat mypy_commit)
          git clone https://github.com/python/mypy.git
          cd mypy
          git checkout $COMMIT
          git submodule update --init --recursive
      - name: Install pyodide-build
        run: |
          python -m pip install "pyodide-build==0.21.0"
      - name: Build wasm wheels
        env:
          MYPY_USE_MYPYC: "1"
          MYPYC_OPT_LEVEL: "3"
          EMSCRIPTEN_DIR: ${{ steps.install_emsdk.outputs.EMSCRIPTEN_DIR }}
        run: |
          cd mypy
          source $EMSCRIPTEN_DIR/emsdk_env.sh
          pyodide build --exports pyinit
      - name: Install pyodide for WASM test
        run: |
          npm install pyodide@0.21.3
      - name: Run WASM smoke test
        run: |
          node wasm_test.js
      - uses: actions/upload-artifact@v4
        with:
          name: dist-wasm_wheel
          path: |
            mypy/dist/*.whl
          overwrite: true

  release:
    name: create release
    needs: [build_wheels, build_sdist_python_wheel]
    runs-on: ubuntu-latest
    steps:
      - name: Download artifact
        uses: actions/download-artifact@v4
        with:
          pattern: dist-*
          path: dist
          merge-multiple: true
      - name: Release
        if: ${{ github.event_name != 'pull_request' }}
        # https://github.com/actions/upload-release-asset/issues/47
        uses: actions/github-script@v7
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const fs = require('fs').promises;
            const { repo: { owner, repo }, sha } = context;

            console.log('environment', process.versions);
            console.log({ owner, repo, sha });

            const release = await github.rest.repos.createRelease({
              owner, repo,
              // if GITHUB_REF just appears to be a branch, use tag-{commit} as the tag
              tag_name: process.env.GITHUB_REF.includes("refs/heads/") ? "tag-" + sha : process.env.GITHUB_REF.split("/").pop(),
              target_commitish: sha
            });

            console.log('created release', { release });

            for (let file of await fs.readdir('dist')) {
              console.log('uploading', file);

              await github.rest.repos.uploadReleaseAsset({
                owner, repo,
                release_id: release.data.id,
                name: file,
                data: await fs.readFile(`./dist/${file}`)
              });
            }