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cpython/PCbuild/find_python.bat at 3.11 · python/cpython · GitHub
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find_python.bat
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@
rem
@
rem
Searches for python.exe and may download a private copy from nuget.
@
rem
@
rem
This file is supposed to modify the state of the caller (specifically
@
rem
the MSBUILD variable), so we do not use setlocal or echo, and avoid
@
rem
changing any other persistent state.
@
rem
@
set
_Py_D
=
%~dp0
@
rem
First argument -q means only show the command in output
@
if '
%1
'
EQU
'-q' (shift
&&
set
_Py_Quiet
=
1)
@
rem
No arguments provided means do full search
@
if '
%1
'
EQU
''
goto
:
begin_search
@
rem
One argument may be the full path. Use a goto so we don't try to
@
rem
parse the next if statement - incorrect quoting in the multi-arg
@
rem
case can cause us to break immediately.
@
if '
%2
'
EQU
''
goto
:
one_arg
@
rem
Entire command line may represent the full path if quoting failed.
@
if exist
"
%*
"
(set PYTHON=
"
%*
"
)
&
(set _Py_Python_Source=from environment)
&
goto
:
found
@
goto :
begin_search
:
one_arg
@
if exist
"
%~1
"
(set PYTHON=
"
%~1
"
)
&
(set _Py_Python_Source=from environment)
&
goto
:
found
:
begin_search
@
set
PYTHON
=
@
rem
If there is an active virtual env, use that one
@
if
NOT
"
%VIRTUAL_ENV%
"
==
"
"
(set PYTHON=
"
%VIRTUAL_ENV%
\Scripts\python.exe
"
)
&
(set _Py_Python_Source=found in virtual env)
&
goto
:
found
@
set
_Py_EXTERNALS_DIR
=
%EXTERNALS_DIR%
@
if
"
%_Py_EXTERNALS_DIR%
"
==
"
"
(set _Py_EXTERNALS_DIR=
%_Py_D%
\..\externals)
@
rem
If we have Python in externals, use that one
@
if exist
"
%_Py_EXTERNALS_DIR%
\pythonx86\tools\python.exe
"
(
"
%_Py_EXTERNALS_DIR%
\pythonx86\tools\python.exe
"
-Ec
"
import sys; assert sys.version_info[:2] >= (3, 8)
"
>
nul
2
>
nul
)
&&
(set PYTHON=
"
%_Py_EXTERNALS_DIR%
\pythonx86\tools\python.exe
"
)
&&
(set _Py_Python_Source=found in externals directory)
&&
goto
:
found
||
rmdir
/Q /S
"
%_Py_EXTERNALS_DIR%
\pythonx86
"
@
rem
If HOST_PYTHON is recent enough, use that
@
if
NOT
"
%HOST_PYTHON%
"
==
"
"
@
%HOST_PYTHON%
-Ec
"
import sys; assert sys.version_info[:2] >= (3, 9)
"
>
nul
2
>
nul
&&
(set PYTHON=
"
%HOST_PYTHON%
"
)
&&
(set _Py_Python_Source=found as HOST_PYTHON)
&&
goto
:
found
@
rem
If py.exe finds a recent enough version, use that one
@
for
%%
p in (3.10 3.9) do
@
py -
%%
p -EV
>
nul
2
>&
1
&&
(set PYTHON=py -
%%
p)
&&
(set _Py_Python_Source=found
%%
p with py.exe)
&&
goto
:
found
@
if
NOT
exist
"
%_Py_EXTERNALS_DIR%
"
mkdir
"
%_Py_EXTERNALS_DIR%
"
@
set
_Py_NUGET
=
%NUGET%
@
set
_Py_NUGET_URL
=
%NUGET_URL%
@
set
_Py_HOST_PYTHON
=
%HOST_PYTHON%
@
if
"
%_Py_HOST_PYTHON%
"
==
"
"
set
_Py_HOST_PYTHON
=
py
@
if
"
%_Py_NUGET%
"
==
"
"
(set _Py_NUGET=
%_Py_EXTERNALS_DIR%
\nuget.exe)
@
if
"
%_Py_NUGET_URL%
"
==
"
"
(set _Py_NUGET_URL=https://dist.nuget.org/win-x86-commandline/latest/nuget.exe)
@
if
NOT
exist
"
%_Py_NUGET%
"
(
@
if
not
"
%_Py_Quiet%
"
==
"
1
"
@
echo
Downloading nuget...
@
rem
NB: Must use single quotes around NUGET here, NOT double!
@
rem
Otherwise, a space in the path would break things
@
rem
If it fails, retry with any available copy of Python
@
powershell.exe -Command Invoke-WebRequest
%_Py_NUGET_URL%
-OutFile '
%_Py_NUGET%
'
@
if errorlevel
1
(
@
%_Py_HOST_PYTHON%
-E
"
%_Py_D%
\urlretrieve.py
"
"
%_Py_NUGET_URL%
"
"
%_Py_NUGET%
"
)
)
@
if
not
"
%_Py_Quiet%
"
==
"
1
"
@
echo
Installing Python via nuget...
@
if
not
"
%_Py_Quiet%
"
==
"
1
"
(
@
"
%_Py_NUGET%
"
install pythonx86 -ExcludeVersion -OutputDirectory
"
%_Py_EXTERNALS_DIR%
"
)
else
(
@
"
%_Py_NUGET%
"
install pythonx86 -Verbosity quiet -ExcludeVersion -OutputDirectory
"
%_Py_EXTERNALS_DIR%
"
)
@
rem
Quote it here; it's not quoted later because "py -x.y" wouldn't work
@
if
not
errorlevel
1
(set PYTHON=
"
%_Py_EXTERNALS_DIR%
\pythonx86\tools\python.exe
"
)
&
(set _Py_Python_Source=found on nuget.org)
&
goto
:
found
@
set
_Py_D
=
@
set
_Py_Quiet
=
@
set
_Py_Python_Source
=
@
set
_Py_EXTERNALS_DIR
=
@
set
_Py_NUGET
=
@
set
_Py_NUGET_URL
=
@
set
_Py_HOST_PYTHON
=
@
exit /b
1
:
found
@
if
"
%_Py_Quiet%
"
==
"
1
"
(
@
echo
%PYTHON%
)
else
@
echo
Using
%PYTHON%
(
%_Py_Python_Source%
)
@
set
_Py_D
=
@
set
_Py_Quiet
=
@
set
_Py_Python_Source
=
@
set
_Py_EXTERNALS_DIR
=
@
set
_Py_NUGET
=
@
set
_Py_NUGET_URL
=
@
set
_Py_HOST_PYTHON
=
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