Re: [Pydev-code] Problems with latest Cygwin DLL

[Fabio Z. <fa...@gm...>]

Hi Pete,

Thank you for the investigation.

Do you think you can provide a pull request with that change at:
https://github.com/fabioz/PyDev ?

Best Regards,

Fabio

On Thu, Jan 5, 2017 at 9:19 PM, Pete Flugstad <pet...@gm...>
wrote:

> I recently ran into some problems reinstalling the Cygwin python
> interpreter into PyDev on an install where it was previously working.
>
> Specifically, Eclipse wasn't able to use the Cygwin python interpreter
> with the Cygwin DLL version 2.5.2 and later to discover the various paths - interpreterInfo.py
> was failing:
>
> [~] $ python /c/dev/eclipse-cpp-neon-1a-win32-x86_64/plugins/org.
> python.pydev_5.4.0.201611281236/pysrc/interpreterInfo.py
> Traceback (most recent call last):
>   File "/c/dev/eclipse-cpp-neon-1a-win32-x86_64/plugins/org.
> python.pydev_5.4.0.201611281236/pysrc/interpreterInfo.py", line 207, in
> <module>
>     prefix = tounicode(native_path(sys.prefix))
>   File "/c/dev/eclipse-cpp-neon-1a-win32-x86_64/plugins/org.
> python.pydev_5.4.0.201611281236/pysrc/interpreterInfo.py", line 71, in
> native_path
>     ctypes.cdll.cygwin1.cygwin_conv_path(CCP_POSIX_TO_WIN_A, path,
> retval, MAX_PATH)
>   File "/cygdrive/c/Cygwin/lib/python2.7/ctypes/__init__.py", line 435,
> in __getattr__
>     dll = self._dlltype(name)
>   File "/cygdrive/c/Cygwin/lib/python2.7/ctypes/__init__.py", line 365,
> in __init__
>     self._handle = _dlopen(self._name, mode)
> OSError: No such file or directory
>
> I tracked it down to the line: <https://github.com/fabioz/Pyd
> ev/blob/master/plugins/org.python.pydev/pysrc/interpreterInfo.py#L68> :
>
> ctypes.cdll.cygwin1.cygwin_conv_path(CCP_POSIX_TO_WIN_A, path, retval,
> MAX_PATH)
>
> After some digging, I found other projects where having issues as well -
> it was briefly discussed on the cygwin mailing list:
>
> https://cygwin.com/ml/cygwin/2016-06/msg00379.html
>
> I didn't see any followup on this, and it doesn't look like they've
> reverted that change.
>
> In any case, the fix for PyDev is fairly easy - change the above line in interpreterInfo.py
> to:
>
> cygwin1dll = ctypes.cdll.LoadLibrary( 'cygwin1.dll' )
> cygwin1dll.cygwin_conv_path(CCP_POSIX_TO_WIN_A, path, retval, MAX_PATH)
>
> Hope this helps.
>
> Pete
>
>
>
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