Make venv portable

start.bat

@@ -4,8 +4,9 @@ cd /d %~dp0
 
 if exist .venv\Lib\site-packages\ujson*.pyd (
   (
-    .venv\Scripts\activate.bat
-    python pyeamu.py
+    goto :make_venv_portable
+    :start_server
+    .venv\Scripts\activate.bat && python pyeamu.py
   )
 ) else (
   (
@@ -22,3 +23,46 @@ echo https://www.python.org/ftp/python/3.11.1/python-3.11.1-amd64.exe
 echo:
 
 pause
+
+goto :eof
+
+:make_venv_portable
+set pyvenv="%~dp0.venv\pyvenv.cfg"
+set pyvenvtemp="%~dp0.venv\pyvenv.tmp"
+for /f "tokens=*" %%i in ('python -V') do set pyver=%%i
+for /f %%i in ('where python') do set pypath=%%i
+set v=home version executable command
+for %%a in (%v%) do for /f "tokens=*" %%i in ('findstr /b %%a %pyvenv%') do set %%a=%%i
+if exist %pyvenvtemp% del %pyvenvtemp%
+setlocal enabledelayedexpansion
+(
+    for /f "tokens=1* delims=:" %%a in ('findstr /n "^" %pyvenv%') do (
+        set "line=%%b"
+        if "!line!"=="%home%" (set line=home = %pypath:~0,-11%)
+        if "!line!"=="%version%" (set line=version = %pyver:~7%)
+        if "!line!"=="%executable%" (set line=executable = %pypath%)
+        if "!line!"=="%command%" (set line=command = %pypath% -m venv %~dp0.venv)
+        echo(!line!
+    )
+) > %pyvenvtemp%
+endlocal
+del %pyvenv%
+rename %pyvenvtemp% pyvenv.cfg
+
+set activate="%~dp0.venv\Scripts\activate.bat"
+set activatetemp="%~dp0.venv\Scripts\activate.tmp"
+for /f "tokens=*" %%i in ('findstr "VIRTUAL_ENV=" %activate%') do set virtual=%%i
+if exist %activatetemp% del %activatetemp%
+setlocal enabledelayedexpansion
+(
+    for /f "tokens=1* delims=:" %%a in ('findstr /n "^" %activate%') do (
+        set "line=%%b"
+        if "!line!"=="%virtual%" (set line=set VIRTUAL_ENV=%~dp0.venv)
+        if "!line!"=="END" (set line=:END)
+        echo(!line!
+    )
+) > %activatetemp%
+endlocal
+del %activate%
+rename "%activatetemp%" activate.bat
+goto :start_server