Inconsistent python2 exe running

[refack]

My "weird" system has two executables named python2:

[12:59:24.60] c:\Users\refael>where python2
C:\Tools\res\scripts\python2.bat
C:\bin\msys64\usr\bin\python2.exe

[13:02:04.47] c:\Users\refael>C:\Tools\res\scripts\python2.bat -V
C:\bin\dev\python27\python.exe -V
Python 2.7.8

[13:02:06.15] c:\Users\refael>C:\bin\msys64\usr\bin\python2.exe -V
Python 2.7.9

When running node-gyp configure the wrong one is run:

...
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb `which` succeeded python2 C:\Tools\res\scripts\python2.BAT
gyp verb check python version `python2 -c "import platform; print(platform.python_version());"` returned: "2.7.9\n"
...

[TooTallNate]

Why is it the wrong one? returned: "2.7.9\n" <- that's the newer one.

[refack]

Obviously the two calls find different exes, and are inconsistent.
which finds python2.bat, but trying to parse the exec() result fails, because node finds python2.exe (different file, with no . PYTHONPATH fix)
Anyway, on my system, 2.7.8 is win32, and 2.7.9 is msys2

[refack]

So you are right @TooTallNate, this stems from node-which being inconsistent with child_process.execFile's lookup.
But in this case, if you're already calling which, why not use it's result as the explicit path to python2?

[refack]

Relates to #750