xpra 4.3 appears to be broken

Hello guix.

Relatively fresh guix, pulled 2 days ago.

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$ guix describe

Generation 10 Dec 27 2021 15:36:01 (current)

guix 9e9489f

repository URL: https://git.savannah.gnu.org/git/guix.git

branch: master

commit: 9e9489fb11ac73e51abe293235738d70365affa9

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Installing xpra 4.3 package as described in xorg.scm. Looks like

it pulls a substitute with upstream log at

where I don't really see anything pop as suspicious

Attempting to start a session however fails:

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$ guix environment --ad-hoc xpra --pure -- xpra start :100

2021-12-29 09:44:20,712 Warning: cannot load cython bencode

module: No module named 'xpra.net.bencode.cython_bencode'

Warning: using '/run/user/1000' as XDG_RUNTIME_DIR

xpra initialization error:

start is not supported by this local installation

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I reported this to xpra maintainer first thinking the problem was

there https://github.com/Xpra-org/xpra/issues/3403but they confirmed that our build was likely incomplete. As per

above you can already tell that cython_bencode is in fact missing

and indeed I don't see it in the built artefact in the store,

though it is present in the source repo. "start not supported"

above indicates we have bigger issues, as per maintainer we

probably don't have access to the server component. Briefly

grepping for that warning origin, looks like we're likely failing

the supports_server test in xpra/scripts/parsing.py:

if supports_server:

try:

from xpra.x11.bindings.wait_for_x_server import

wait_for_x_server #@UnresolvedImport @UnusedImport

except ImportError:

supports_server = False

I am way out of my depth to debug this on my own, but happy to try

and assist.

I believe the previous build of 4.2.smth worked for me, so must be

something new. Is there an easy way to downgrade this package

without rolling entire guix? Do I use inferior guix for that

somehow?

Happy to follow this up with guix xpra package maintainer if only

I could figure who that courageous soul was.

Thanks

Hi,

it’s also broken for me and I couldn’t come up with an easy fix,

so I reverted the upgrade to 4.3 for now. If you `guix pull` it should

be back to 4.2.2.

You definitely can use inferiors to work around something like this. You

could also run a known-good version via `guix shell --commit=xxx`.

Cheers,

Lars

Hi again,

it looks like this was not sufficient. I pushed

927c58925667eabdcd07a9dc68e283ef0f6b6b0e to fix it and upgraded xpra

again in b3b6373cd6a759896b2c5ea4f84b7f0fa9df9e8d.

Cheers,

Lars