fix: remove obsolete Nix configuration files for delta setup #435

	name: Nix Flake Check

	on:
	pull_request:
	paths:
	- '**.nix'
	- '**.age'
	- '.github/workflows/check.yml'
	push:
	branches:
	- 'main'
	paths:
	- '**.nix'
	- '**.age'
	- '.github/workflows/check.yml'
	workflow_dispatch:

	jobs:
	get-hosts:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	id-token: write
	outputs:
	hosts: ${{ steps.set-hosts.outputs.hosts }}
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: DeterminateSystems/nix-installer-action@main
	- id: set-hosts
	run: echo "hosts=$(nix eval .#nixosConfigurations --apply builtins.attrNames --json)" >> $GITHUB_OUTPUT

	check-hosts:
	needs: get-hosts
	runs-on: ubuntu-latest
	strategy:
	matrix:
	host: ${{ fromJson(needs.get-hosts.outputs.hosts) }}
	fail-fast: false
	permissions:
	contents: read
	id-token: write

	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: DeterminateSystems/nix-installer-action@main
	with:
	determinate: true
	- uses: DeterminateSystems/magic-nix-cache-action@main
	- name: Check host ${{ matrix.host }}
	run: nix build .#nixosConfigurations.${{ matrix.host }}.config.system.build.toplevel --dry-run

	auto-update:
	runs-on: ubuntu-latest
	needs: check-hosts
	if: github.ref == 'refs/heads/main'

	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- run: git checkout -b auto-update && git reset --hard origin/main && git push origin auto-update -f
	- run: curl -d "Github Actions Update" ntfy.sh/${{ secrets.NTFY_UPDATE_TOPIC }}

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