Add NixOS configuration build workflows

.github/workflows/build-devshell.yaml

@@ -0,0 +1,26 @@
+name: Build NixOS configuration
+
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@main
+      - name: Check flake.lock file
+        uses: DeterminateSystems/flake-checker-action@main
+      - name: Install nix and flakes
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Use magic nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Use cachix nix cache
+        uses: cachix/cachix-action@master
+        with:
+          name: nichijou
+          extraPullNames: colmena,cuda-maintainers,hyprland,nix-community,nixpkgs-wayland,numtide,nrdxp
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - name: Build devshell
+        run: nix develop --command "echo 'Hello, world!'"

.github/workflows/build-hakase.yaml

@@ -0,0 +1,12 @@
+name: Build hakase configuration
+
+on:
+  push:
+  workflow_dispatch:
+
+jobs:
+  call-workflow-passing-data:
+    uses: ./.github/workflows/build-nixos.yaml
+    with:
+      configuration: hakase
+    secrets: inherit

.github/workflows/build-nixos.yaml

@@ -0,0 +1,32 @@
+name: Build NixOS configuration
+
+on:
+  workflow_call:
+    inputs:
+      configuration:
+        required: true
+        type: string
+    secrets:
+      CACHIX_AUTH_TOKEN:
+        required: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@main
+      - name: Check flake.lock file
+        uses: DeterminateSystems/flake-checker-action@main
+      - name: Install nix and flakes
+        uses: DeterminateSystems/nix-installer-action@main
+      - name: Use magic nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+      - name: Use cachix nix cache
+        uses: cachix/cachix-action@master
+        with:
+          name: nichijou
+          extraPullNames: colmena,cuda-maintainers,hyprland,nix-community,nixpkgs-wayland,numtide,nrdxp
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - name: Build system configuration
+        run: nix build ".#nixosConfigurations.${{ inputs.configuration }}.config.system.build.toplevel"