add ci

Author: Mic92

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  merge_group:
+
+permissions:
+  contents: read
+
+jobs:
+  nix-build:
+    runs-on: "${{ matrix.os }}"
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          # not supported by the flake atm
+          #- ubuntu-22.04-arm
+          #- macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v31
+      - uses: cachix/cachix-action@v16
+        with:
+          name: nixos-infra-dev
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - run: nix run --inputs-from . nixpkgs#nix-fast-build -- --skip-cached --no-nom

flake.nix

@@ -66,9 +66,11 @@
 
       };
 
-      defaultPackage.x86_64-linux = (import nixpkgs {
+      packages.default.x86_64-linux = (import nixpkgs {
         system = "x86_64-linux";
         overlays = [ self.overlays.default ];
       }).nixos-channel-scripts;
+
+      checks.x86_64-linux.default = self.packages.default.x86_64-linux;
     };
 }