name: Build
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-latest
    env:
      IMAGE: ghcr.io/flipstone/haskell-tools:debian-ghc-9.10.3-5d6640d
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          path: repo

      - name: Cache Stack
        uses: actions/cache@v4
        with:
          path: repo/.stack-root
          key: stack-${{ runner.os }}-${{ hashFiles('repo/stack.yaml', 'repo/package.yaml', 'repo/converge.cabal') }}
          restore-keys: stack-${{ runner.os }}-

      - name: Build
        run: |
          mkdir -p repo/.stack-root repo/build
          docker run --rm \
            -v "$(pwd)/repo:/work" \
            -v "$(pwd)/repo/.stack-root:/stack-root" \
            -e STACK_ROOT=/stack-root \
            -w /work \
            "$IMAGE" \
            stack build --copy-bins --local-bin-path /work/build

      - name: Compress with UPX
        run: |
          UPX_VERSION="5.1.1"
          UPX_ARCHIVE="upx-${UPX_VERSION}-amd64_linux.tar.xz"
          UPX_DIR="/tmp/upx-${UPX_VERSION}-amd64_linux"
          if [ ! -x "${UPX_DIR}/upx" ]; then
            curl -fsSL "https://github.com/upx/upx/releases/download/v${UPX_VERSION}/${UPX_ARCHIVE}" \
              | tar -xJ -C /tmp
          fi
          ${UPX_DIR}/upx repo/build/converge

      - name: Upload artifact
        uses: actions/upload-artifact@v4
        with:
          name: converge
          path: repo/build/converge
          compression-level: 0