PythonBuildAgent/.github/workflows/osx.yml at master · SteamClientHomebrew/PythonBuildAgent · GitHub

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name: Build ARM64 Python on macOS

on:
  workflow_dispatch:

jobs:
  build:
    runs-on: macos-latest
    steps:
      - name: Set up Rosetta 2
        run: |
          softwareupdate --install-rosetta --agree-to-license || true

      - name: Download Python 3.11.8 Source
        run: |
          curl -O https://www.python.org/ftp/python/3.11.8/Python-3.11.8.tgz
          tar -xf Python-3.11.8.tgz
          cd Python-3.11.8

      - name: Build Python 3.11.8 for ARM64
        run: |
          cd Python-3.11.8
          arch -arm64 ./configure --prefix=/tmp/python-build --enable-optimizations
          arch -arm64 make -j$(sysctl -n hw.ncpu)
          arch -arm64 make install

          sudo mkdir -p /tmp/python-build/lib/tmp
          cd /tmp/python-build/lib/tmp
          sudo ar -x ../libpython3.11.a
          sudo gcc -m32 -shared -o ../libpython-3.11.8.dylib *.o -arch arm64

          cd /tmp/python-build/lib
          sudo rm -rf tmp
          ls

          # Remove unimportant files that take up lots of space
          sudo rm -rf /tmp/python-build/lib/python3.11/test/
          sudo rm -rf /tmp/python-build/lib/python3.11/__pycache__/
          sudo rm -rf /tmp/python-build/lib/python3.11/config-3.11-darwin/
          sudo rm -rf /tmp/python-build/lib/python3.11/tkinter/
          sudo rm -rf /tmp/python-build/lib/python3.11/idlelib/
          sudo rm -rf /tmp/python-build/lib/python3.11/turtledemo/

          # Remove the static library as we've built a shared library
          sudo rm /tmp/python-build/lib/libpython3.11.a

          # Strip the build binaries to reduce size
          sudo strip /tmp/python-build/bin/python3.11
          sudo strip /tmp/python-build/lib/libpython-3.11.8.dylib

          # Remove extra bin files that are not needed
          sudo rm /tmp/python-build/bin/python3.11-config
          sudo rm /tmp/python-build/bin/idle3.11
          sudo rm /tmp/python-build/bin/pydoc3.11
          sudo rm /tmp/python-build/bin/pip3.11
          sudo rm /tmp/python-build/bin/2to3-3.11

      - name: Verify Build
        run: |
          /tmp/python-build/bin/python3 --version
          /tmp/python-build/bin/python3 -c "import platform; print(platform.machine())"
          file $HOME/python-arm64/bin/python3

      - name: Upload Python Artifact
        uses: actions/upload-artifact@v4
        with:
          name: python-arm64-macos
          path: /tmp/python-build/
          include-hidden-files: 'true'