patch-drift.yml

name: Patch drift

# Early warning that upstream OpenCode has drifted under our patches: applies
# every patch in patches/ against upstream HEAD with `git apply --check`. A
# failure here does not break releases (builds pin REVISION in
# scripts/build.sh); it means the next pin bump will need patch regeneration.

on:
  schedule:
    - cron: "0 6 * * 1"
  workflow_dispatch:

permissions:
  contents: read

jobs:
  check:
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@v6

      - name: Clone upstream HEAD (sparse)
        run: |
          git clone --filter=blob:none --no-checkout https://github.com/anomalyco/opencode.git /tmp/upstream
          git -C /tmp/upstream sparse-checkout set packages
          git -C /tmp/upstream checkout

      - name: Check patches against upstream HEAD
        run: |
          status=0
          for patch in patches/*.patch; do
            echo "::group::$patch"
            if sed 's/\r$//' "$patch" | git -C /tmp/upstream apply --check -; then
              echo "OK: $patch applies to upstream HEAD"
            else
              echo "::error file=$patch::$patch no longer applies to upstream HEAD ($(git -C /tmp/upstream rev-parse HEAD))"
              status=1
            fi
            echo "::endgroup::"
          done
          exit "$status"