feat: use matrix for simpler and parallel host builds

Also some general cleanup of the workflow YAML

.forgejo/workflows/nix-build.yaml

@@ -1,41 +1,25 @@
 on: [push]
 jobs:
-  check:
+  build-host:
+    runs-on: nixos-host
+    strategy:
+      matrix:
+        info:
+          - host: beefcake
+          - host: router
+          - host: dragon
+          - host: foxtrot
+          - host: flipflop
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build host
+      run: |
+        nix shell nixpkgs#nixos-rebuild -c nixos-rebuild build --flake .#${{ matrix.info.host }} --accept-flake-config
+
+  build-devshell:
     runs-on: nixos-host
     steps:
-    - name: Checkout
-      uses: actions/checkout@v3
-        
-    # cache not needed since we now run on the host directly
-    # - name: Load cached nix store
-    #   id: cache-nix-store
-    #   uses: actions/cache/restore@v4
-    #   with:
-    #     path: /nix/store
-    #     key: ${{ runner.os }}-nix-store
-
-    - name: Build server
-      run: |
-        nix shell nixpkgs#nixos-rebuild -c nixos-rebuild build --flake .#beefcake --accept-flake-config
-
-    - name: Build router
-      run: |
-        nix shell nixpkgs#nixos-rebuild -c nixos-rebuild build --flake .#router --accept-flake-config
-
-    - name: Build desktop
-      run: |
-        nix shell nixpkgs#nixos-rebuild -c nixos-rebuild build --flake .#dragon --accept-flake-config
-
-    - name: Build laptop
-      run: |
-        nix shell nixpkgs#nixos-rebuild -c nixos-rebuild build --flake .#foxtrot --accept-flake-config
-
+    - uses: actions/checkout@v3
     - name: Build default devShell
       run: |
-        nix develop . --build 
-
-    # - name: Save nix store
-    #   uses: actions/cache/save@v4
-    #   with:
-    #     path: /nix/store
-    #     key: ${{ steps.cache-nix-store.outputs.cache-primary-key }}
+        nix develop . --build --accept-flake-config

.forgejo/workflows/nix-flake-check.yaml

@@ -3,23 +3,7 @@ jobs:
   check:
     runs-on: nixos-host
     steps:
-    - name: Checkout
-      uses: actions/checkout@v3
-        
-    # cache not needed since we now run on the host directly
-    # - name: Load cached nix store
-    #   id: cache-nix-store
-    #   uses: actions/cache/restore@v4
-    #   with:
-    #     path: /nix/store
-    #     key: ${{ runner.os }}-nix-store
-
+    - uses: actions/checkout@v3
     - name: Check nix flake
       run: |
-        nix flake check
-
-    # - name: Save nix store
-    #   uses: actions/cache/save@v4
-    #   with:
-    #     path: /nix/store
-    #     key: ${{ steps.cache-nix-store.outputs.cache-primary-key }}
+        nix flake check --accept-flake-config