name: nix

on:
  push:
    branches:
      - main
      - 'release/**'
    paths-ignore:
      - '/*.sh'
      - '/.*'
      - '/_*'
      - 'docs/**'
      - '**.adoc'
      - '**.md'
      - 'ci/**'
      - '.github/workflows/*.yml'
      - '!.github/workflows/nix.yml'
  pull_request:
    paths-ignore:
      - '/*.sh'
      - '/.*'
      - '/_*'
      - 'docs/**'
      - '**.adoc'
      - '**.md'
      - 'ci/**'

jobs:
  build:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macos-latest]
    if: "!contains(github.event.head_commit.message, 'skip ci')"

    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 1
          submodules: true
      - uses: cachix/install-nix-action@v15
        with:
          nix_path: nixpkgs=channel:nixos-unstable
      - run: nix build .?submodules=1