Use a better method to set TELEMAC-MASCARET Python as the default one

config/pysource.win.bat

@@ -14,31 +14,24 @@ set SYSTELCFG=%HOMETEL%\configs\systel.edf.cfg
 rem Name of the configuration to use
 set USETELCFG=win.gnu
 
-rem Add TELEMAC-MASCARET Python to PATH, its modules to PYTHONPATH and set it
-rem as the default one by updating the registry and setting-up a py.ini local
-rem file. This file will need to be removed manually to restore the default
-rem Python version, if any.
+rem Add Python to PATH, its modules to PYTHONPATH and set it as the
+rem default one to launch Python scripts from the command line
 setlocal enabledelayedexpansion
 set python=python-3.7.9
 endlocal & (
   set "PATH=%TELEMACDEPS%\%python%;%TELEMACDEPS%\%python%\Scripts;%PATH%"
   set "PYTHONPATH=%TELEMACDEPS%\%python%\Lib\site-packages"
-  reg add HKCU\SOFTWARE\Python\PythonCore\3.7_otm\InstallPath /ve /d %TELEMACDEPS%\%python% /f 1>null
-  reg add HKCU\SOFTWARE\Python\PythonCore\3.7_otm\InstallPath /v ExecutablePath /d %TELEMACDEPS%\%python%\python.exe /f 1>null
+  reg delete HKCU\SOFTWARE\Classes\.py\OpenWithProgids /f 1>null
+  reg add HKCU\SOFTWARE\Classes\.py\shell\open\command /ve /f /d "%TELEMACDEPS%\%python%\python.exe \"%%1\" %%*" 1>null
 )
-(
-  echo [defaults]
-  echo python=3.7_otm
-  echo python3=3.7_otm
-) > %LOCALAPPDATA%\py.ini
 
-rem Add Mingw to PATH if found
+rem Add Mingw to PATH is it is found
 call :find_mingw
 
-rem Add TELEMAC binaries and scripts directories to PATH
+rem Add TELEMAC binaries directory to PATH
 set PATH=%HOMETEL%\builds\%USETELCFG%\lib;%PATH%
+rem Add TELEMAC Python scripts to PATH and to Python environment
 set PATH=%HOMETEL%\scripts\python3;%PATH%
-rem Add TELEMAC Python scripts to the Python environment
 set PYTHONPATH=%HOMETEL%\scripts\python3;%PYTHONPATH%
 set PYTHONPATH=%HOMETEL%\builds\%USETELCFG%\wrap_api\lib;%PYTHONPATH%
 

config/pysource.win.debug.bat

@@ -14,31 +14,24 @@ set SYSTELCFG=%HOMETEL%\configs\systel.edf.cfg
 rem Name of the configuration to use
 set USETELCFG=win.gnu.debug
 
-rem Add TELEMAC-MASCARET Python to PATH, its modules to PYTHONPATH and set it
-rem as the default one by updating the registry and setting-up a py.ini local
-rem file. This file will need to be removed manually to restore the default
-rem Python version, if any.
+rem Add Python to PATH, its modules to PYTHONPATH and set it as the
+rem default one to launch Python scripts from the command line
 setlocal enabledelayedexpansion
 set python=python-3.7.9
 endlocal & (
   set "PATH=%TELEMACDEPS%\%python%;%TELEMACDEPS%\%python%\Scripts;%PATH%"
   set "PYTHONPATH=%TELEMACDEPS%\%python%\Lib\site-packages"
-  reg add HKCU\SOFTWARE\Python\PythonCore\3.7_otm\InstallPath /ve /d %TELEMACDEPS%\%python% /f 1>null
-  reg add HKCU\SOFTWARE\Python\PythonCore\3.7_otm\InstallPath /v ExecutablePath /d %TELEMACDEPS%\%python%\python.exe /f 1>null
+  reg delete HKCU\SOFTWARE\Classes\.py\OpenWithProgids /f 1>null
+  reg add HKCU\SOFTWARE\Classes\.py\shell\open\command /ve /f /d "%TELEMACDEPS%\%python%\python.exe \"%%1\" %%*" 1>null
 )
-(
-  echo [defaults]
-  echo python=3.7_otm
-  echo python3=3.7_otm
-) > %LOCALAPPDATA%\py.ini
 
-rem Add Mingw to PATH if found
+rem Add Mingw to PATH is it is found
 call :find_mingw
 
-rem Add TELEMAC binaries and scripts directories to PATH
+rem Add TELEMAC binaries directory to PATH
 set PATH=%HOMETEL%\builds\%USETELCFG%\lib;%PATH%
+rem Add TELEMAC Python scripts to PATH and to Python environment
 set PATH=%HOMETEL%\scripts\python3;%PATH%
-rem Add TELEMAC Python scripts to the Python environment
 set PYTHONPATH=%HOMETEL%\scripts\python3;%PYTHONPATH%
 set PYTHONPATH=%HOMETEL%\builds\%USETELCFG%\wrap_api\lib;%PYTHONPATH%