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
      STACK_ROOT: /tmp/.stack-root
    steps:
      - name: Checkout
        uses: actions/checkout@v4

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

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

      - name: Compress with UPX
        run: |
          docker run --rm \
            -v "$(pwd):/work" \
            -w /work \
            "$IMAGE" \
            bash -c '
              UPX_VERSION="5.1.1"
              UPX_URL="https://github.com/upx/upx/releases/download/v${UPX_VERSION}/upx-${UPX_VERSION}-amd64_linux.tar.xz"
              UPX_DIR="/tmp/upx-${UPX_VERSION}-amd64_linux"
              if [ ! -x "${UPX_DIR}/upx" ]; then
                curl -fsSL "${UPX_URL}" | tar -xJ -C /tmp
              fi
              "${UPX_DIR}/upx" /work/build/converge
            '

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