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find_python.cmd
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51 lines (46 loc) · 1.51 KB
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@IF NOT DEFINED DEBUG_HELPER @ECHO OFF
SETLOCAL
:: If python.exe is in %Path%, just validate
FOR /F "delims=" %%a IN ('where python 2^> NUL') DO (
SET need_path=0
SET p=%%~dpa
IF NOT ERRORLEVEL 1 GOTO :validate
)
:: Query the 3 locations mentioned in PEP 514 for a python2 InstallPath
FOR %%K IN ( "HKCU\Software", "HKLM\SOFTWARE", "HKLM\Software\Wow6432Node") DO (
SET need_path=1
CALL :find-main-branch %%K
:: If validate returns 0 just jump to the end
IF NOT ERRORLEVEL 1 GOTO :validate
)
EXIT /B 1
:: Helper subroutine to handle quotes in %1
:find-main-branch
SET main_key="%~1\Python\PythonCore"
REG QUERY %main_key% /s | findstr "2." | findstr InstallPath > NUL 2> NUL
IF NOT ERRORLEVEL 1 CALL :find-key %main_key%
EXIT /B
:: Query registry sub-tree for InstallPath
:find-key
<
45AE
/div>FOR /F "delims=" %%a IN ('REG QUERY %1 /s ^| findstr "2." ^| findstr InstallPath') DO IF NOT ERRORLEVEL 1 CALL :find-path %%a
EXIT /B
:: Parse the value of %1 as the path for python.exe
:find-path
FOR /F "tokens=3*" %%a IN ('REG QUERY %1 /ve') DO (
SET pt=%%a
IF NOT ERRORLEVEL 1 SET p=%pt%
EXIT /B 0
)
EXIT /B 1
:: Check if %p% holds a path to a real python2 executable
:validate
IF NOT EXIST "%p%python.exe" EXIT /B 1
:: Check if %p% is python2
"%p%python.exe" -V 2>&1 | findstr /R "^Python.2.*" > NUL
IF ERRORLEVEL 1 EXIT /B %ERRORLEVEL%
:: We can wrap it up
ENDLOCAL & SET pt=%p%& SET need_path_ext=%need_path%
SET VCBUILD_PYTHON_LOCATION=%pt%python.exe
IF %need_path_ext%==1 SET Path=%Path%;%pt%
SET need_path_ext=
EXIT /B %ERRORLEVEL%