name: Build WeirdPerformance 2.4-B GC test

on:
  push:
    branches:
      - test/wp24b-gc-safe-sweep
    paths:
      - 'experiments/wp24b-gc/**'
      - '.github/workflows/wp24b-gc.yml'
  workflow_dispatch:

permissions:
  contents: read

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: mlugg/setup-zig@v2
        with:
          version: master
      - name: Build x86 ReleaseSmall DLL
        working-directory: experiments/wp24b-gc
        run: |
          set -euo pipefail
          zig build --fetch
          python3 - <<'PY'
          from pathlib import Path
          matches = list(Path("zig-pkg").glob("zhook-*/src/zhook.zig"))
          if len(matches) != 1:
              raise SystemExit(f"expected one pinned zhook source, found {len(matches)}")
          p = matches[0]
          text = p.read_text(encoding="utf-8")
          old = "var patch: [MAX_STOLEN]u8 = .{0x90} ** MAX_STOLEN;"
          new = "var patch: [MAX_STOLEN]u8 = @splat(0x90);"
          if old not in text:
              raise SystemExit("expected pinned zhook repeat initializer not found")
          p.write_text(text.replace(old, new), encoding="utf-8")
          PY
          zig build -Doptimize=small
          test -s zig-out/bin/weirdperformance_gc24b.dll
          file zig-out/bin/weirdperformance_gc24b.dll
          sha256sum zig-out/bin/weirdperformance_gc24b.dll | tee SHA256SUMS.txt
      - uses: actions/upload-artifact@v4
        with:
          name: WeirdPerformance-2.4-B-GC-Safe-Sweep
          path: |
            experiments/wp24b-gc/zig-out/bin/weirdperformance_gc24b.dll
            experiments/wp24b-gc/SHA256SUMS.txt
            experiments/wp24b-gc/README.md
          if-no-files-found: error