add nix flake

flake.lock

@@ -0,0 +1,40 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1623875721,
+        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1625919529,
+        "narHash": "sha256-Epn7JRegnKN81hQh4hGx1FOwfp3fBxDCIuSZDgqaBQ4=",
+        "path": "/nix/store/yh05k932arpkhblqrxnjcp28fpqh7nia-source",
+        "rev": "cf59fbd539681f5ec2f4a82cf77aae7ab827a03f",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,55 @@
+{
+  description = "A colorful wallpaper generator";
+
+  nixConfig.bash-prompt = "\[\\e[1m\\e[34mhuepaper-develop\\e[0m\]$ ";
+
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils }:
+
+    flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        {
+
+          # Package
+
+          packages.huepaper =
+
+            pkgs.python3Packages.buildPythonPackage rec {
+
+              name = "huepaper";
+              src = self;
+
+              nativeBuildInputs = with pkgs; [
+                wrapGAppsHook
+              ];
+
+              propagatedBuildInputs = with pkgs; [
+                python3Packages.colour
+                python3Packages.pillow
+              ];
+
+            };
+
+          defaultPackage = self.packages.${system}.huepaper;
+
+          # Development shell
+
+          devShell = pkgs.mkShell {
+
+            buildInputs = with pkgs; [
+              python3
+              python3Packages.colour
+              python3Packages.pillow
+              python3Packages.pip
+              python3Packages.setuptools
+              python3Packages.virtualenv
+            ];
+
+          };
+        }
+      );
+}