move templates

templates/_cmake-c/flake.nix

@@ -0,0 +1,56 @@
+{
+  description = "Cmake C Flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs = inputs @ {
+    self,
+    flake-parts,
+    ...
+  }:
+    flake-parts.lib.mkFlake {inherit inputs;} (
+      top: {
+        imports = [];
+
+        flake = {
+          overlays.default = final: prev: {
+            my-derivation = final.callPackage ./nix/derivation.nix {};
+          };
+        };
+
+        systems = [
+          "x86_64-linux"
+        ];
+
+        perSystem = {
+          self',
+          pkgs,
+          system,
+          ...
+        }: {
+          _module.args.pkgs = import inputs.nixpkgs {
+            inherit system;
+            overlays = [self.overlays.default];
+          };
+
+          packages.default = pkgs.my-derivation;
+
+          devShells.default = pkgs.mkShell {
+            packages = [
+              pkgs.cmake-language-server
+              pkgs.cmake-format
+              pkgs.clang-tools
+              pkgs.gdb
+            ];
+            inputsFrom = [self'.packages.default];
+            shellHook = ''
+              export CMAKE_EXPORT_COMPILE_COMMANDS=ON
+            '';
+          };
+        };
+      }
+    );
+}