name: Linearize chapter history

on:
  push:
    branches:
      - main

jobs:
  linearize:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          ref: main
          fetch-depth: 0 # Fetch the full history
      - name: Construct linear history and push to linear branch
        run: |
          git config user.name 'GitHub Action'
          git config user.email 'actions@github.com'
          .github/workflows/linearize.sh
          git remote add linear ./linear
          git fetch linear
          git checkout -b linear linear/main
          git remote remove linear
          git push -f origin linear
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}