Description

macOS 11 (20230803) has two dist-info directories installed for pip that causes its unexpected behavior.

See steps to reproduce and AR & ER below.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• macOS 11
• macOS 12
• macOS 13
• Windows Server 2019
• Windows Server 2022

Image version and build link

Image: https://github.com/actions/runner-images/releases/tag/macOS-11%2F20230803.1
Build: https://github.com/Netcracker/KubeMarine/actions/runs/5806754239

Is it regression?

Yes, the problem does not reproduce on previous build 20230709.1

Expected behavior

1. Only one dist-info directory /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/pip-23.2.1.dist-info
2. pip install pip==23.0 should downgrade the pip package.

Actual behavior

1. Two dist-info directories

   /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/pip-23.1.2.dist-info
   /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/pip-23.2.1.dist-info
   

2. pip install pip==23.0 "upgrades" the pip package to 23.2.1.

Repro steps

Synthetic job configuration:

  test-pip:
    runs-on: macos-11
    steps:
      - run: |
          find /Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages -name 'pip-*.dist-info'
      - uses: actions/setup-python@v4
        with:
          python-version: "3.11"
      - run: |
          pip show pip
          pip install pip==23.0
          pip show pip