name: Build a system
on:
  workflow_call:
    inputs:
      job:
        required: true
        type: string
    secrets:
      NIX_CACHE_KEY:
        required: true
      AWS_CREDENTIALS:
        required: true
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2
      - name: Cleanup Disk
        uses: curoky/cleanup-disk-action@v2.0
        with:
          retain: ''
      - name: Install Nix
        uses: cachix/install-nix-action@v18
        with:
          nix_path: nixpkgs=channel:nixos-unstable
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nixcache:8KKuGz95Pk4UJ5W/Ni+pN+v+LDTkMMFV4yrGmAYgkDg= hydra.nixos.org-1:CNHJZBh9K4tP3EKF6FkkgeVYsS3ohTl+oS0Qa8bezVs=
            experimental-features = nix-command flakes ca-derivations
            post-build-hook = ${{ github.workspace }}/scripts/post-build-hook
            substituters = https://cache.chir.rs/ https://cache.nixos.org/
            extra-platforms = armv7l-linux aarch64-linux powerpc-linux powerpc64-linux powerpc64le-linux riscv32-linux riscv64-linux wasm32-wasi i686-linux
            sandbox = false
      - name: Download patched nix
        run: nix build github:DarkKirb/nix-packages#nix-s3-dedup
      - name: Set up secrets
        run: |
          echo "$NIX_CACHE_KEY" > ~/cache.key
          sudo mkdir /root/.aws
          echo "$AWS_CREDENTIALS" | sudo tee /root/.aws/credentials > /dev/null
        env:
          NIX_CACHE_KEY: ${{secrets.NIX_CACHE_KEY}}
          AWS_CREDENTIALS: ${{secrets.AWS_CREDENTIALS}}
      - name: Build ${{ inputs.job }}
        run: |
          DRV_PATH=$(nix-instantiate -E '(import ./.).${{ inputs.job }}')
          OUT_PATH=$(nix show-derivation $DRV_PATH | jq -r ".\"$DRV_PATH\".outputs.out.path")
          NARINFO=$(echo $OUT_PATH | sed 's|/| |g' | sed 's|-| |g' | awk '{print $3}')
          if curl --output /dev/null --silent --fail "https://cache.chir.rs/$NARINFO.narinfo"; then
            echo "${{ inputs.job }} already built. Skipping"
          else
            nix-store -r $DRV_PATH
          fi
        env:
          NIXPKGS_ALLOW_UNFREE: 1