nix.yml

name: Nix CI
on:
  push:
    branches:
      - main
      - catalyst-fund*
  pull_request:

jobs:
  decision:
    name: Decide what we need to build
    runs-on: ubuntu-latest

    outputs:
      packages: ${{ steps.packages.outputs.packages }}

    steps:
    - name: Checkout
      uses: actions/checkout@v3

    - name: Setup
      uses: ./.github/actions/nix-common-setup
      with:
        CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}

    - name: Packages
      id: packages
      run: |
        packages=$(nix eval .#packages.x86_64-linux --apply builtins.attrNames --json)
        echo "PACKAGES -> $packages"
        echo "::set-output name=packages::$packages"

  build:
    name: Build ${{ matrix.package }} package
    needs:
      - decision
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        package: ${{ fromJSON(needs.decision.outputs.packages) }}
        exclude:
          - package: default

    steps:

    - name: Checkout
      uses: actions/checkout@v3

    - name: Setup
      uses: ./.github/actions/nix-common-setup
      with:
        CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}

    - name: Build package
      run: |
        path=$(nix eval --raw .#packages.x86_64-linux.${{ matrix.package }})
        hash=${path:11:32}
        url="https://iog.cachix.org/$hash.narinfo";
        if curl --output /dev/null --silent --head --fail "$url"; then
          echo "Nothing to build!!!"
          echo ""
          echo "See build log with:"
          echo "  nix log $path"
          echo ""
        else
          nix build .#packages.x86_64-linux.${{ matrix.package }} --show-trace -L
        fi