feat: patent retrival and semi-processed

flake.nix

@@ -1,9 +1,8 @@
-# flake.nix
 {
-  description = "A Python development environment";
+  description = "Python dev env (NixOS 25.11) using project-local venv";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11"; # Pin to the nixos-25.11 channel
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
@@ -12,39 +11,45 @@
       let
         pkgs = nixpkgs.legacyPackages.${system};
 
-        # Define Python version and packages
-        pythonVersion = "python311"; # You can change this to python310, python312, etc.
-        pythonEnv = pkgs.${pythonVersion}; # Get the specific Python environment
-        
-        pythonPackages = ps: with ps; [
-          # Core Python
-         #pkgs.${pythonVersion}
-
-          pythonEnv.pkgs.pip
-          pythonEnv.pkgs.setuptools
-          pythonEnv.pkgs.wheel
-
-          # Example useful packages (uncomment and add as needed)
-          # black             # Code formatter
-          # ruff              # Fast Python linter
-          # mypy              # Static type checker
-          # ipython           # Enhanced interactive Python shell
-          # venvwrapper       # Virtual environment manager (can be useful even with Nix)
-        ];
-
-      in
-      {
+        # Pick your Python version here
+        python = pkgs.python311; # or python312, etc.
+      in {
         devShells.default = pkgs.mkShell {
-          name = "python-dev-shell";
+          name = "python-venv-shell";
 
-          packages = pythonPackages pkgs;
+          packages = [
+            python
+            pkgs.python311Packages.virtualenv  # gives `virtualenv` tool
+          ];
 
-          # Environment variables you might want to set
           shellHook = ''
-            echo "Welcome to the Python development shell!"
-            export NIX_PROJECT_SHELL="SPARC"
+            echo "== Nix dev shell (Python $(python --version 2>&1)) =="
+
+            # Create a venv in .venv if it doesn't exist yet
+            if [ ! -d ".venv" ]; then
+              echo "Creating local virtualenv in .venv ..."
+              python -m venv .venv
+            fi
+
+            # Activate the venv
+            echo "Activating .venv"
+            . .venv/bin/activate
+
+            # Tell you what Python/pip you're using
+            echo "Using python: $(which python)"
+            echo "Using pip:    $(which pip)"
+
+            # Install / update deps from requirements.txt *into .venv*
+            if [ -f "requirements.txt" ]; then
+              echo "Installing dependencies from requirements.txt into .venv ..."
+              pip install -r requirements.txt
+            else
+              echo "No requirements.txt found in $(pwd)"
+            fi
+
+            # Prompt tweak so you can see when venv is active
+            export PS1="(SPARC-venv) $PS1"
           '';
         };
-      }
-    );
+      });
 }