Remove unnecessary CDL_PYTHONEXE environment variable

Author: PierreRaybaut

DataLab-demo.bat

@@ -1,9 +1,24 @@
 @echo off
-for %%a in ("%CDL_PYTHONEXE%") do set "p_dir=%%~dpa"
-for %%a in (%p_dir:~0,-1%) do set "WINPYDIRBASE=%%~dpa"
-call %WINPYDIRBASE%scripts\env_for_icons.bat %*
+REM Check if a Python executable path is provided as an argument
+if "%1" == "" (
+    echo Error: Python executable path must be provided as an argument.
+    echo Usage: DataLab.bat path\to\python.exe
+    exit /b 1
+) else (
+    REM Use the provided Python executable path
+    set PYTHON_EXE=%1
+)
+REM Validate that the provided Python executable exists
+if not exist %PYTHON_EXE% (
+    echo Error: The specified Python executable does not exist: %PYTHON_EXE%
+    exit /b 2
+)
+
 cd/D %~dp0
 set ORIGINAL_PYTHONPATH=%PYTHONPATH%
 for /F "tokens=*" %%A in (.env) do (set %%A)
 set PYTHONPATH=%PYTHONPATH%;%ORIGINAL_PYTHONPATH%
-start "" "%WINPYDIR%\pythonw.exe" cdl\start.pyw %*
+
+REM Extract pythonw.exe from the same directory as the provided python.exe
+for %%a in ("%PYTHON_EXE%") do set "PYTHON_DIR=%%~dpa"
+start "" "%PYTHON_DIR%pythonw.exe" cdl\start.pyw %2 %3 %4 %5 %6 %7 %8 %9

DataLab.bat

@@ -102,8 +102,6 @@ Building PDF documentation requires LaTeX. On Windows, the following environment
 Visual Studio Code configuration used in `launch.json` and/or `tasks.json`
 (examples) :
 
-    @REM Development environment
-    set CDL_PYTHONEXE=C:\python-3.9.10.amd64\python.exe
     @REM Folder containing additional working test data
     set CDL_DATA=C:\Dev\Projets\CDL_data