name: Build NixOS (on demand)

on:
  workflow_dispatch:
    inputs:
      host:
        description: 'host name to build'
        required: true
        default: 'othalan'
        type: string
      lockFile:
        description: 'flake.lock file'
        type: string

  workflow_call:
    inputs:
      host:
        description: 'host name to build'
        required: true
        default: 'othalan'
        type: string


concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}-${{ inputs.host }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      # # The default disk size of these runners is ~14GB
      # # Cleanup the disk, see upstream discussion https://github.com/actions/runner-images/issues/2840.
      # - name: Cleanup Disk Space
      #   run: |
      #     echo "Before removing files:"
      #     df -h
      #     sudo rm -rf "$AGENT_TOOLSDIRECTORY"
      #     sudo rm -rf /opt
      #     sudo rm -rf /usr/share/dotnet
      #     sudo rm -rf /usr/local/{lib/android,share/boost}
      #     sudo docker image prune --all --force
      #     echo "After removing files:"
      #     df -h
      
      - name: Maximize build space
        uses: AdityaGarg8/remove-unwanted-software@v3
        with:
          remove-android: 'true'
          remove-dotnet: 'true'
          remove-haskell: 'true'
          remove-codeql: 'true'
          remove-docker-images: 'true'
          remove-large-packages: 'true'
          remove-cached-tools: 'true'
          remove-swapfile: 'true'

      - name: Checkout
        uses: actions/checkout@v4

      - name: Build
        run: |
          echo "Free space:"
          df -h
      - uses: actions/checkout@v4

      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@v7

      - uses: cachix/cachix-action@v15
        with:
          name: daylin
          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"

      - name: write lock file
        if: "${{ inputs.lockFile != '' }}"
        run: |
          echo '${{ inputs.lockFile }}' > flake.lock
          git diff

      - name: Build
        run: |
          nix run . --accept-flake-config -- cache --host "${{ inputs.host }}" --flake .