main.yml

# yaml-language-server: $schema=https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/schemas/json/github-workflow.json
# Our desired pipeline using only a Nix shell environment
name: Check and build
on:
  push:
    branches:
      - main
    tags:
      - "v*.*.*"
  pull_request:
    branches:
      - main

jobs:
  check_nix:
    name: Check Ray tracing
    runs-on: ubuntu-22.04
    steps:
      - name: git checkout
        uses: actions/checkout@v3
      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      # Nix-specific logic begins here
      - name: Check Rust formatting
        run: |
          nix develop --command \
            cargo fmt --check

  build_and_test_nix:
    name: Test and build Ray Tracer
    needs: check_nix
    strategy:
      matrix:
        os: [ubuntu-22.04, macos-12]
    runs-on: ubuntu-22.04
    steps:
      - name: git checkout
        uses: actions/checkout@v3
      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main
      - name: Set up Rust cache
        uses: actions/cache@v3
        with:
          path: |
            ~/.cargo/bin/
            ~/.cargo/registry/index/
            ~/.cargo/registry/cache/
            ~/.cargo/git/db/
            target/
          key: ray-tracer-${{ hashFiles('**/Cargo.lock') }}
      - name: Test
        run: |
          nix develop --command \
            cargo test