RFE: Support for connection to local display

[opoplawski]

Short description of the problem

It would be nice to have some kind of --local-display option that would:

# --plugin-option=bind_mount:dirs=[("/tmp/.X11-unix", "/tmp/.X11-unix")]
# set DISPLAY=:0
# add the needed xauth entries

helpful for testing X programs. I hear that X11 is going away, but perhaps wayland could be supported as well in some way.

[scfc]

AFAICT, mounting the directory is not necessary. However, it only seems to work (with mounting the directory or not) either with --old-chroot or with --enable-network.

For authentication, it appears to work to extract the cookie with xauth extract /tmp/x "$DISPLAY" and then --copyin /tmp/x /builddir/.Xauthority (or piping that to xauth merge if that has been installed in the chroot) . This is probably much preferable to the current advice to just disable authentication altogether.

Either way, having a simple option (and ideally exposing it via fedpkg as well) would make this so much easier (and safer).

[sergiomb2]

yes we need --old-chroot or with --enable-network to "test graphical apps inside mock" or it doesn't work

BTW https://fedoraproject.org/wiki/Docs/Drafts/MockSetupUsingLocalMirror and https://fedoraproject.org/wiki/Using_Mock_to_test_package_builds#Proxy_Configurations this documentation is also not available anywhere else