Nix Flake Cleanup

.gitignore

@@ -30,4 +30,7 @@ site/*
 Zone.Identifier
 
 #Vector Lock File
-can/dbc/**/*.ldb
+can/dbc/**/*.ldb
+
+# Arduino-cli files
+.arduino*

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2022 UT Longhorn Racing Solar
+Copyright (c) 2026 UT Longhorn Racing Solar
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

flake.nix

@@ -1,5 +1,5 @@
 {
-  description = "LHRs STM32 Embedded Dev";
+  description = "LHRs Embedded Dev";
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/23.05";
@@ -38,21 +38,18 @@
             pkgs.parallel
             pkgs.sl
             pkgs.gcc-arm-embedded
-            pkgs.picocom
             python
+            pkgs.openocd
           ];
 
           # Extra debug/flash tools, only if available
           debugPackages =
             if pkgs.stdenv.isLinux then [
               pkgs.gdb
-              pkgs.openocd
               pkgs.stlink
             ] else if pkgs.stdenv.isDarwin then [
-              pkgs.openocd
               pkgs.stlink
               pkgs.lldb
-              pkgs.openocd or null
             ] else [];
 
           # Remove nulls
@@ -69,32 +66,12 @@
             echo "${armGccMessage}"
             ${if armGcc != null then "export PATH=$PATH:${armGcc}/bin" else ""}
 
-            # Provide lsusb-mac alias
-            if [[ "$OSTYPE" == "darwin"* ]]; then
-              lsusb_mac() {
-                system_profiler SPUSBDataType
-              }
-              export -f lsusb_mac
-              echo "Run: lsusb_mac (macOS USB info)"
-
-              ls_stm32_dev_port() {
-                  ls /dev/cu.*
-              }
-              export -f ls_stm32_dev_port
-              echo "On Mac run: ls_stm32_dev_port (to list STM32 serial port)"
-            else
-              echo "Run: lsusb (Linux USB info)"
+            if [ -f "./nix-hook.sh" ]; then
+              # Make it executable
+              chmod +x ./nix-hook.sh
+              source ./nix-hook.sh
             fi
 
-            if [ ! -d .venv ]; then
-              python3 -m venv .venv
-              echo "Creating python venv"
-            fi
-            source .venv/bin/activate
-            echo "Installing python requirements"
-            if [ -f requirements.txt ]; then
-              pip install -r requirements.txt
-            fi
             echo "Dev environment loaded for ${system}!"
           '';
         };

nix-hook.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+# Exit on error
+set -e
+
+# Get the directory where this script is located
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+# --- Python Setup ---
+export PIP_DISABLE_PIP_VERSION_CHECK=1
+VENV_PATH="$SCRIPT_DIR/.venv"
+REQ_PATH="$SCRIPT_DIR/requirements.txt"
+SENTINEL="$VENV_PATH/.pip_installed"
+
+if [ ! -d "$VENV_PATH" ]; then
+    echo "Creating virtual environment..."
+    python3 -m venv "$VENV_PATH"
+fi
+
+source "$VENV_PATH/bin/activate"
+
+if [ -f "$REQ_PATH" ]; then
+    # Only install if the sentinel doesn't exist OR requirements.txt is newer than the sentinel
+    if [ ! -f "$SENTINEL" ] || [ "$REQ_PATH" -nt "$SENTINEL" ]; then
+        echo "Updating python requirements..."
+        if pip install -q -r "$REQ_PATH"; then
+            touch "$SENTINEL"
+        else
+            echo "Error: pip install failed."
+            exit 1
+        fi
+    fi
+fi
+
+
+# --- Helpers ---
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    lsusb_mac() { system_profiler SPUSBDataType; }
+    export -f lsusb_mac
+
+    ls_stm32_dev_port() { ls /dev/cu.*; }
+    export -f ls_stm32_dev_port
+fi