name: CI

on:
  push:
    paths-ignore:
      - "**.md"
    branches:
      - 'main'
  # this is needed when pushing tags manually, apparantly.
  # https://github.com/actions/runner/issues/1007
  create:
  pull_request:
    paths-ignore:
      - "**.md"
    branches-ignore:
      - 'dependabot/*'
jobs:
  CI:
    runs-on: ubuntu-latest
    concurrency:
      group: CI
    steps:
    - name: Maximize build space
      uses: easimon/maximize-build-space@master
      with:
        overprovision-lvm: 'true'
        remove-dotnet: 'true'
        remove-android: 'true'
        remove-haskell: 'true'
        remove-codeql: 'true'
        remove-docker-images: 'true'
    - name: Checkout
      uses: actions/checkout@v4
    - name: "Install Nix"
      uses: cachix/install-nix-action@v27
      with:
        install_url: https://releases.nixos.org/nix/nix-2.18.4/install
    - name: "Set Up Binary Cache"
      uses: cachix/cachix-action@v15
      with:
        name: t2linux
        authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
        pushFilter: "(squashfs.img$|x86_64-linux.iso$)"
    - name: Build
      env:
        GC_DONT_GC: 1
      run: |
        for output in $(nix flake show --json | nix run nixpkgs#jq -- -r 'keys[]'); do
          nix build .#$output
          if [ $(du -B1M result/iso/*.iso | cut -f1) -gt 2000 ]; then
            split -d result/iso/*.iso -b 2000M nixos-$output.iso.part-
          else
            cp result/iso/*.iso nixos-$output.iso
          fi
          rm result
        done
    - name: Release
      uses: softprops/action-gh-release@v2
      if: startsWith(github.ref, 'refs/tags/v')
      with:
        files: "nixos-*.iso*"