Add flake for nix users

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -53,3 +53,4 @@ user_path_config-deprecated.txt
 /.coverage*
 /auth.json
 .DS_Store
+.direnv

flake.nix

@@ -0,0 +1,62 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+        };
+        venv-dir = "fooocus_env";
+      in {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # For more packages/package search go to https://search.nixos.org/
+            python310 # Adjust Python version as needed
+            python310Packages.pip
+            python310Packages.virtualenv
+            pkg-config
+            stdenv.cc.cc.lib
+            cudatoolkit
+            cudaPackages.cudnn
+            cudaPackages.cuda_cudart
+            gcc13
+            zlib
+          ];
+
+          shellHook = ''
+            export CUDA_PATH=${pkgs.cudatoolkit}
+            export CC=${pkgs.gcc13}/bin/gcc
+            export CXX=${pkgs.gcc13}/bin/g++
+            export PATH=${pkgs.gcc13}/bin:$PATH
+
+            export LD_LIBRARY_PATH=${
+              pkgs.lib.makeLibraryPath [
+                "/run/opengl-driver"
+                pkgs.cudatoolkit
+                pkgs.cudaPackages.cudnn
+                pkgs.stdenv.cc.cc
+              ]
+            }:$LD_LIBRARY_PATH
+
+
+            export LIBRARY_PATH=${
+              pkgs.lib.makeLibraryPath [ pkgs.cudatoolkit ]
+            }:$LIBRARY_PATH
+
+            if [ ! -d ${venv-dir} ]; then
+            echo "Creating virtual environment..."
+              python3 -m venv ${venv-dir}
+            fi
+
+            echo "Activating virtual environment..."
+            source ${venv-dir}/bin/activate
+            pip install -r ./requirements_versions.txt
+          '';
+        };
+      });
+}