.github/workflows/prune-branches.yml

name: Prune Unused Branches

permissions:
  contents: read

on:
  pull_request:
    paths:
     - .github/workflows/prune-branches.yml
  schedule:
    - cron: '0 8 * * *' # Runs daily at 08:00 UTC.

jobs:
  prune-branches:
    name: Prune Branches
    if: github.repository_owner == 'llvm'
    runs-on: ubuntu-24.04
    permissions:
      contents: write
    steps:
      - name: Fetch LLVM sources
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
        with:
          fetch-depth: 0
      - name: Install dependencies
        run: |
          pip install --require-hashes -r ./llvm/utils/git/requirements.txt
      - name: Run Script
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          mkdir patches
          python3 .github/workflows/prune-unused-branches.py patches/
      - name: Upload Patches
        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
        with:
          name: BranchDiffs
          retention-days: 90
          path: patches/*.patch