Add check action

.github/workflows/check.yml

@@ -0,0 +1,14 @@
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  check:
+    runs-on: "ubuntu-22.04"
+    steps:
+      - uses: "actions/checkout@v4"
+      - uses: "DeterminateSystems/nix-installer-action@main"
+      - uses: "DeterminateSystems/magic-nix-cache-action@main"
+      - name: Flake check
+        run: nix develop --command check

.github/workflows/flakehub-publish-tagged.yml

@@ -5,13 +5,14 @@ on:
 
 jobs:
   publish:
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-22.04"
     permissions:
       id-token: "write"
       contents: "read"
     steps:
-      - uses: "actions/checkout@v3"
+      - uses: "actions/checkout@v4"
       - uses: "DeterminateSystems/nix-installer-action@main"
+      - uses: "DeterminateSystems/magic-nix-cache-action@main"
       - uses: "DeterminateSystems/flakehub-push@main"
         with:
           visibility: "public"

flake.nix

@@ -15,6 +15,16 @@
               ${exec "nixpkgs-fmt"} **/*.nix
             '';
 
+            check = prev.writeScriptBin "check" ''
+              for dir in `ls -d */`; do # Iterate through all the templates
+                (
+                  cd $dir
+
+                  nix flake check --all-systems --no-build
+                )
+              done
+            '';
+
             dvt = prev.writeScriptBin "dvt" ''
               if [ -z $1 ]; then
                 echo "no template specified"
@@ -46,8 +56,6 @@
                   nix flake check --all-systems --no-build
                 )
               done
-
-
             '';
           })
       ];
@@ -59,7 +67,7 @@
     {
       devShells = forEachSupportedSystem ({ pkgs }: {
         default = pkgs.mkShell {
-          packages = with pkgs; [ format update ];
+          packages = with pkgs; [ check format update ];
         };
       });