name: Cache the SSG build
run-name: cache-ssg

on:
  push:
    paths:
      - 'ssg/**'
      - '.forgejo/workflows/cache-ssg.yaml'

jobs:
  build-cache:
    runs-on: debian-latest
    steps:
      - uses: actions/checkout@v3
        with:
          path: dgnum.eu

      - name: Install sudo
        run: apt-get update && apt-get install sudo

      - name: Install Nix
        uses: https://github.com/cachix/install-nix-action@v22
        with:
          nix_path: nixpkgs=channel:nixos-unstable

      - name: Install attic, build and cache
        run: |
          nix-env -i npins -f '<nixpkgs>'

          npins init
          npins add github zhaofengli attic -b main