Add flake template to nix-direnv

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/user/console/nix-direnv/default.nix

@@ -32,15 +32,34 @@
             nix-direnv() {
               if [ -z "$1" ]; then
                 echo "use flake" > .envrc
+
+                if [ ! -f flake.nix ]; then
+                  echo "Do you want to create an empty flake.nix? (y/N)"
+                  read -r answer
+                  if [[ "$answer" =~ ^[Yy]$ ]]; then
+                    cp "${./template.nix}" flake.nix
+                  fi
+                fi
               else
                 echo "use flake self#$1" > .envrc
               fi
 
-              if git rev-parse --is-inside-work-tree &> /dev/null && ! grep -q "^\.envrc$" .gitignore .git/info/exclude; then
+              if git rev-parse --is-inside-work-tree &> /dev/null; then
-                echo "Do you want to hide the .envrc file from git? (y/N)"
+                if ! grep -q "^\.envrc$" .gitignore .git/info/exclude; then
-                read -r answer
+                  echo "Do you want to hide the .envrc file from git? (y/N)"
-                if [[ "$answer" =~ ^[Yy]$ ]]; then
+                  read -r answer
-                  echo ".envrc" >> .git/info/exclude
+                  if [[ "$answer" =~ ^[Yy]$ ]]; then
+                    echo ".envrc" >> .git/info/exclude
+                  fi
+                fi
+
+                if [ -f flake.nix ] && ! grep -q "^flake.nix$" .gitignore .git/info/exclude; then
+                  echo "Do you want to hide the flake.nix and flake.lock files from git? (y/N)"
+                  read -r answer
+                  if [[ "$answer" =~ ^[Yy]$ ]]; then
+                    echo "flake.nix" >> .git/info/exclude
+                    echo "flake.lock" >> .git/info/exclude
+                  fi
                 fi
               fi
 

hosts/common/configs/user/console/nix-direnv/template.nix

@@ -0,0 +1,30 @@
+{
+  inputs = {
+    nixpkgs = {
+      type = "github";
+      owner = "karaolidis";
+      repo = "nixpkgs";
+      ref = "integration";
+    };
+
+    flake-utils = {
+      url = "github:numtide/flake-utils";
+    };
+  };
+
+  outputs =
+    { nixpkgs, ... }@inputs:
+    inputs.flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          packages = [ ];
+        };
+
+        formatter = pkgs.nixfmt-rfc-style;
+      }
+    );
+}