ci-nixos.yml

name: ci-nixos
on:
  push: # This is only run when PRs are merged into master
    branches:
      - master
  workflow_dispatch:
# These jobs can take a long time and potentially cause us to bump up against CI
# rate limits. Instead we've opted to run these only on merges to master. We might
# have to limit these further if the rate limiting remains
jobs:
  nixos_configs_get:
    name: nixos configurations get name
    runs-on: ubuntu-latest
    outputs:
      nixosconfignames: ${{ steps.nixosconfigsget.outputs.nixosconfignames }}
    steps:
      - uses: actions/checkout@v3
      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@main
      - name: Get all NixOS configurations
        id: nixosconfigsget
        run: |
          nixosconfignames=$(nix eval .\#nixosConfigurations --apply builtins.attrNames --json)
          echo "$nixosconfignames"
          echo "nixosconfignames=$nixosconfignames" >> $GITHUB_OUTPUT
  nixos_configs_build:
    name: build ${{ matrix.configName }} nixos configuration
    needs: nixos_configs_get
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        configName: ${{ fromJSON(needs.nixos_configs_get.outputs.nixosconfignames) }}
    steps:
      - uses: actions/checkout@v3
      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@main
      - name: Build ${{ matrix.configName }} nixos configuration
        run: |
          nix build -L .#nixosConfigurations.${{ matrix.configName }}.config.system.build.toplevel