Windows: General improvements to dev scripts

build.bat

@@ -1,18 +1,37 @@
 @echo off
-cls
-set dirpath=%~dp0
-if "%dirpath:~-1%" == "\" set dirpath=%dirpath:~0,-1%
 
+REM Get the directory path of the script
+set "dirpath=%~dp0"
+if "%dirpath:~-1%" == "\" set "dirpath=%dirpath:~0,-1%"
+
+REM Check if the virtual environment exists
 if not exist "%dirpath%\env" (
     echo:
     echo No virtual environment found! Run setup_env.bat to set it up first.
     echo:
     pause
-    exit
+    exit /b
 )
 
+REM Check if pyinstaller and pywin32 is installed in the virtual environment
 if not exist "%dirpath%\env\scripts\pyinstaller.exe" (
     "%dirpath%\env\scripts\pip" install pyinstaller
+    if errorlevel 1 (
+        echo Failed to install pyinstaller.
+        exit /b 1
+    )
     "%dirpath%\env\scripts\python" "%dirpath%\env\scripts\pywin32_postinstall.py" -install -silent
+    if errorlevel 1 (
+        echo Failed to run pywin32_postinstall.py.
+        exit /b 1
+    )
 )
-"%dirpath%/env/scripts/pyinstaller" "%dirpath%\build.spec"
+
+REM Run pyinstaller with the specified build spec file
+"%dirpath%\env\scripts\pyinstaller" "%dirpath%\build.spec"
+if errorlevel 1 (
+    echo PyInstaller build failed.
+    exit /b 1
+)
+
+echo Build completed successfully.

setup_env.bat

@@ -1,35 +1,54 @@
 @echo off
-cls
-set dirpath=%~dp0
-if "%dirpath:~-1%" == "\" set dirpath=%dirpath:~0,-1%
 
-git --version > nul
+REM Get the directory path of the script
+set "dirpath=%~dp0"
+if "%dirpath:~-1%" == "\" set "dirpath=%dirpath:~0,-1%"
+
+REM Check if git is installed
+git --version > nul 2>&1
 if %errorlevel% NEQ 0 (
     echo No git executable found in PATH!
     echo:
     pause
-    exit
+    exit /b 1
 )
 
+REM Create the virtual environment if it doesn't exist
 if not exist "%dirpath%\env" (
     echo:
     echo Creating the env folder...
     python -m venv "%dirpath%\env"
     if %errorlevel% NEQ 0 (
         echo:
-        echo No python executable found in PATH!
+        echo No python executable found in PATH or failed to create virtual environment!
         echo:
         pause
+        exit /b 1
     )
 )
 
+REM Activate the virtual environment and install requirements
 echo:
 echo Installing requirements.txt...
 "%dirpath%\env\scripts\python" -m pip install -U pip
+if %errorlevel% NEQ 0 (
+    echo Failed to upgrade pip.
+    exit /b 1
+)
+
 "%dirpath%\env\scripts\pip" install wheel
+if %errorlevel% NEQ 0 (
+    echo Failed to install wheel.
+    exit /b 1
+)
+
 "%dirpath%\env\scripts\pip" install -r "%dirpath%\requirements.txt"
+if %errorlevel% NEQ 0 (
+    echo Failed to install requirements.
+    exit /b 1
+)
 
 echo:
 echo All done!
 echo:
-pause
+pause