name: CI

on:
  push:
    branches: [master]
  pull_request:

jobs:
  build:
    name: build + test (linux x86_64, mcpp)
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      # Bootstrap xlings — the tool that the workspace's `.xlings.json`
      # binds tool versions to (here it pins mcpp 0.0.3).
      - name: Install xlings
        env:
          XLINGS_VERSION: 0.4.25
        run: |
          tarball="xlings-${XLINGS_VERSION}-linux-x86_64.tar.gz"
          curl -fsSL -o "/tmp/${tarball}" \
            "https://github.com/d2learn/xlings/releases/download/v${XLINGS_VERSION}/${tarball}"
          tar -xzf "/tmp/${tarball}" -C /tmp
          "/tmp/xlings-${XLINGS_VERSION}-linux-x86_64/subos/default/bin/xlings" self install
          echo "$HOME/.xlings/subos/current/bin" >> "$GITHUB_PATH"

      # Resolves `.xlings.json` → installs mcpp@0.0.3 (and any other
      # workspace tools listed). Idempotent on cache hits.
      - name: Install workspace tools (.xlings.json)
        run: xlings install -y

      # Cache mcpp's self-bootstrapped sandbox: musl-gcc + binutils +
      # glibc + ninja + patchelf, plus the cloned mcpp-index. ~800 MB
      # one-time download — reused across runs since mcpp 0.0.3's
      # toolchain set is version-pinned.
      - name: Cache mcpp sandbox
        uses: actions/cache@v4
        with:
          path: ~/.xlings/data/xpkgs/xim-x-mcpp/0.0.3/registry
          key: mcpp-sandbox-${{ runner.os }}-mcpp0.0.3

      - name: Build with mcpp
        run: mcpp build

      - name: Run tests
        run: mcpp test