Kakboard fails on Wayland about kakboard HOT 4 CLOSED

That works. Thanks!

And I've just realised what was the source of the problem: I've installed Kakoune as a snap package, since the deb package provided by Ubuntu is a bit outdated. And the Gnome Desktop is breaking Snap configuation. It simply changes env variables at will. A bit selfish desktop I can say...

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That's odd. What versions of Kakoune and wl-clipboard are you using? I can't reproduce this on Manjaro with SwayWM (Kakoune v2020.01.16, wl-clipboard 2.0.0). I'll try on GNOME at some point when I can.

Something you can try is messing with XDG_RUNTIME_DIR and WAYLAND_DISPLAY. The path $XDG_RUNTIME_DIR/$WAYLAND_DISPLAY should be a socket that's created by GNOME. They should both be set already to something like /run/user/<uid> and wayland-0, but you can try specifying them explicitly for wl-copy and wl-paste (both inside and outside of Kakoune).

Inside Kakoune, try setting kakboard_copy_cmd and kakboard_paste_cmd and also just running the commands using Kakoune's <a-|> (pipe selections to a command) and ! (insert command output) keys.

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I used to use it on Manjaro's Sway and I can confirm it works there. I can also confirm it works on Manjaro's Plasma Wayland. This is why I think the problem may be related to some configuration stuff. Specially because I suspect Gnome is messing up with my XDG_DATA_DIRS. But both XDG_RUNTIME_DIR and WAYLAND_DISPLAY point to the right place. It seems to be something else.

What versions of Kakoune and wl-clipboard are you using?

Same versions as yours.

As I said, running wl-copy something or echo something | wl-copy works as expected. But piping a selection from within Kakoune to wl-copy using <a-|> raises the same Failed to connect` error.

I also noted that nvim works as expected and it uses the same wl-clipboard program.

you can try specifying them explicitly for wl-copy and wl-paste

Do you mean by explicitly setting the environment variables?

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Yes, I mean setting them explicitly for the invocation of the program like this:
env XDG_RUNTIME_DIR=/var/run WAYLAND_DISPLAY=wayland-0 wl-copy

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