[Bug 797368] New: Windows bootstrap fails with Python 3.7.1

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=797368

            Bug ID: 797368
           Summary: Windows bootstrap fails with Python 3.7.1
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: cerbero
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: info at josvanegmond.nl
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Git master on Windows with Python 3.7.1 running: python ./cerbero-uninstalled
bootstrap

The following error is printed:

[(12/16) meson -> configure ]
[(12/16) meson -> compile ]
[(12/16) meson -> install ]
running install
Checking .pth file support in
c:\gstreamer\build\cerbero\build\build-tools\Lib\site-packages\
c:\python3\pythonw.exe -E -c pass
TEST FAILED: c:\gstreamer\build\cerbero\build\build-tools\Lib\site-packages\
does NOT support .pth files
error: bad install directory or PYTHONPATH

You are attempting to install a package to a directory that is not
on PYTHONPATH and which Python does not read ".pth" files from.  The
installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:

    c:\gstreamer\build\cerbero\build\build-tools\Lib\site-packages\

and your PYTHONPATH environment variable currently contains:

   
'c:/gstreamer/build/cerbero/build/build-tools/Lib/site-packages;c:/gstreamer/build/cerbero/build/build-tools/Lib/site-packages'

Here are some of your options for correcting the problem:

* You can choose a different installation directory, i.e., one that is
  on PYTHONPATH or supports .pth files

* You can add the installation directory to the PYTHONPATH environment
  variable.  (It must then also be on PYTHONPATH whenever you run
  Python and want to use the package(s) you are installing.)

* You can set up the installation directory to support ".pth" files by
  using one of the approaches described here:

 
https://setuptools.readthedocs.io/en/latest/easy_install.html#custom-installation-locations


Please make the appropriate changes for your system and try again.
Recipe 'meson' failed at the build step 'install'
Traceback (most recent call last):
  File ".\cerbero\build\oven.py", line 144, in _cook_recipe
    stepfunc()
  File "c:/gstreamer/build/cerbero/recipes/build-tools/meson.recipe", line 36,
in install
    cwd=self.build_dir)
  File "c:\python3\lib\subprocess.py", line 341, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['c:\\python3\\python.exe', 'setup.py',
'install', '--prefix', 'c:\\gstreamer\\build\\cerbero\\build\\build-tools']'
returned non-zero exit status 1.
Select an action to proceed:
[0] Enter the shell
[1] Rebuild the recipe from scratch
[2] Rebuild starting from the failed step
[3] Skip recipe
[4] Abort

Downgrading Python to 3.5.4 has solved it. Have tried many workarounds but
downgrade was more straightforward. Haven't tried Python 3.6.x.

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