Hi Torsten,

Thanks for the deep dive into the issue.

I believe one solution would be to make a flag like the current `oldie` but for equals signs in single letter flags.

Could you report this issue with your details to https://gitlab.com/inkscape/extensions/ for me?

Thanks a lot!

Best Regards, Martin Owens

On Wed, 2021-06-02 at 15:31 +0200, fi@igh.de wrote:

Dear Maintainers,

after pulling revision 5448704355e03a97d2838e1ba30272db335f0dbb I have built inkscape according to https://inkscape.org/develop/getting-started/

Trying to manage extensions (Extensions -> Manage Extensions) I receive the following error message:

There has been a problem creating the python environment: Return Code: 3: b'' b'The path =python3 (from --python==python3) does not exist\n' args: ['/usr/bin/virtualenv', '-p=python3', '/home/xx/.config/inkscape/extensions']

Indeed the call is syntactically wrong. Instead of

'-p=python3'

the option

'-p python3' ### without equal sign

should be used.

As far as I understand, the problem seems to exist in

inkscape/share/extensions/extension-manager-bootstrap.py:69

call('virtualenv', TARGET_DIR, p='python3')

which then in inkex/command.py:to_args() is evaluated to the wrong sytnax. According to the (very good) comments in to_args()

:Keyword Arguments:
    * *name* (``str``) --
      Becomes ``--name="val"``
    ...
    * *n* (``str``) --
      Becomes ``-n=val``
    ...

it should become ``-n val``.

I do not know whether a change would result in problems using other programs that want -n=val. Which should that be?

Best regards

Torsten