1@IF NOT DEFINED DEBUG_HELPER @ECHO OFF 2 3echo Looking for Python 4setlocal enabledelayedexpansion 5 6:: To remove the preference for Python 2, but still support it, just remove 7:: the 5 blocks marked with "Python 2:" and the support warnings 8 9:: Python 2: If python.exe is in %Path%, use if it's Python 2 10FOR /F "delims=" %%a IN ('where python.exe 2^> NUL') DO ( 11 SET need_path=0 12 SET p=%%~dpa 13 CALL :validate-v2 14 IF NOT ERRORLEVEL 1 GOTO :found-python2 15 GOTO :done-path-v2 16) 17:done-path-v2 18 19:: Python 2: Query the 3 locations mentioned in PEP 514 for a python2 InstallPath 20FOR %%K IN ( "HKCU\Software", "HKLM\SOFTWARE", "HKLM\Software\Wow6432Node") DO ( 21 SET need_path=1 22 CALL :find-versions-v2 %%K 23 IF NOT ERRORLEVEL 1 CALL :validate-v2 24 IF NOT ERRORLEVEL 1 GOTO :found-python2 25) 26 27:: Use python.exe if in %PATH% 28set need_path=0 29for /f "delims=" %%a in ('where python.exe 2^> nul') do ( 30 set p=%%~dpa 31 goto :found-python 32) 33 34:: Query the 3 locations mentioned in PEP 514 for a Python InstallPath 35set need_path=1 36for %%k in ( "HKCU\Software", "HKLM\SOFTWARE", "HKLM\Software\Wow6432Node") do ( 37 call :find-versions %%k 38 if not errorlevel 1 goto :found-python 39) 40 41goto :no-python 42 43 44:: Python 2: Find Python 2 installations in a registry location 45:find-versions-v2 46for /f "delims=" %%a in ('reg query "%~1\Python\PythonCore" /f * /k 2^> nul ^| findstr /r ^^HK ^| findstr "\\2\."') do ( 47 call :read-installpath %%a 48 if not errorlevel 1 exit /b 0 49) 50exit /b 1 51 52:: Find Python installations in a registry location 53:find-versions 54for /f "delims=" %%a in ('reg query "%~1\Python\PythonCore" /f * /k 2^> nul ^| findstr /r ^^HK') do ( 55 call :read-installpath %%a 56 if not errorlevel 1 exit /b 0 57) 58exit /b 1 59 60:: Read the InstallPath of a given Environment Key to %p% 61:: https://www.python.org/dev/peps/pep-0514/#installpath 62:read-installpath 63:: %%a will receive everything before ), might have spaces depending on language 64:: %%b will receive *, corresponding to everything after ) 65:: %%c will receive REG_SZ 66:: %%d will receive the path, including spaces 67for /f "skip=2 tokens=1* delims=)" %%a in ('reg query "%1\InstallPath" /ve /t REG_SZ 2^> nul') do ( 68 for /f "tokens=1*" %%c in ("%%b") do ( 69 if not "%%c"=="REG_SZ" exit /b 1 70 set "p=%%d" 71 exit /b 0 72 ) 73) 74exit /b 1 75 76 77:: Python 2: Check if %p% holds a path to a real python2 executable 78:validate-v2 79IF NOT EXIST "%p%\python.exe" EXIT /B 1 80:: Check if %p% is python2 81"%p%\python.exe" -V 2>&1 | findstr /R "^Python.2.*" > NUL 82EXIT /B %ERRORLEVEL% 83 84 85:: Python 2: 86:found-python2 87echo Python 2 found in %p%\python.exe 88set pyver=2 89goto :done 90 91:found-python 92echo Python found in %p%\python.exe 93echo WARNING: Python 3 is not yet fully supported, to avoid issues Python 2 should be installed. 94set pyver=3 95goto :done 96 97:done 98endlocal ^ 99 & set "pt=%p%" ^ 100 & set "need_path_ext=%need_path%" ^ 101 & set "VCBUILD_PYTHON_VERSION=%pyver%" 102set "VCBUILD_PYTHON_LOCATION=%pt%\python.exe" 103if %need_path_ext%==1 set "PATH=%pt%;%PATH%" 104set "pt=" 105set "need_path_ext=" 106exit /b 0 107 108:no-python 109echo Could not find Python. 110exit /b 1 111