name: Build all NixOS Configurations

on:
  push:
    branches:
      - "**"
  schedule:
    - cron: "30 2/6 * * *" # not to frequent, GitHub only allows a few pulls per hour

jobs:
  nix build:
    runs-on: native
    steps:
      - uses: actions/checkout@v4

      - name: update nix flakes
        if: ${{ github.event_name == 'schedule' }}
        # we need to use our ssh key here because we need access to private flakes
        run: |
          cat <<EOF > .ssh_key
          ${{ secrets.SSH_KEY }}
          EOF
          chmod 600 .ssh_key

          eval $(ssh-agent)
          ssh-add .ssh_key

          nix flake update

          echo $SSH_AGENT_PID
          kill $SSH_AGENT_PID
          rm .ssh_key

      - name: nix flake archive/check
        # we need to use our ssh key here because we need access to private flakes
        run: |
          cat <<EOF > .ssh_key
          ${{ secrets.SSH_KEY }}
          EOF
          chmod 600 .ssh_key

          eval $(ssh-agent)
          ssh-add .ssh_key

          nix flake archive
          nix flake check --verbose --log-format raw

          echo $SSH_AGENT_PID
          kill $SSH_AGENT_PID
          rm .ssh_key

      - name: nix build orbi
        run: nix build .#nixosConfigurations.orbi.config.system.build.toplevel

      - name: nix build cream
        run: nix build .#nixosConfigurations.cream.config.system.build.toplevel

      - name: nix build cherry
        run: nix build .#nixosConfigurations.cherry.config.system.build.toplevel

      - name: nix build chungus
        run: nix build .#nixosConfigurations.chungus.config.system.build.toplevel

      - name: nix build sternchen
        run: nix build .#nixosConfigurations.sternchen.config.system.build.toplevel

      - name: nix build usbstick
        run: nix build .#nixosConfigurations.usbstick.config.system.build.toplevel

      - name: commit & push
        if: ${{ github.event_name == 'schedule' }}
        # only if all nix builds are fine we update our branch
        run: |
          git config --local user.email "action@git.ingolf-wagner.de"
          git config --local user.name "Forgejo Action :robot:"

          git diff --quiet && \
          git diff --staged --quiet || \
          (git commit -am ":arrow_up: nix flake update" && git push)