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:
      # free up some space
      - run: sudo rm -rf /opt&
      - uses: actions/checkout@v4

      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@v2

      - uses: cachix/cachix-action@v14
        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 .