Agent panics on startup on a headless system (clipboard can't find GUI)

[tirsek]

I have a similar problem as issue #143, but I think it's dissimilar enough to warrant its own issue. I'm running on a headless system (no GUI), so when the agent starts up and attempts to create a clipboard context, cli_clipboard::ClipboardContext::new() from within Agent::new fails, and the subsequent unwrap panics.

thread 'main' panicked at [...]/rbw/src/bin/rbw-agent/agent.rs:77:67:
called `Result::unwrap()` on an `Err` value: XcbConnect(DisplayParsingError)
stack backtrace:
   0: rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::result::unwrap_failed
   3: core::result::Result<T,E>::unwrap
             at ./usr/src/debug/rust/rustc-1.83.0-src/library/core/src/result.rs:1104:23
   4: rbw_agent::agent::Agent::new
             at [...]/rbw/src/bin/rbw-agent/agent.rs:77:28

(Irrelevant stack frames omitted)

It appears that commit 9ad4ac8 first introduced the problem. Prior to this, I just get a warning in the agent.err file:

[2024-12-31T18:19:54Z WARN  rbw_agent::agent] couldn't create clipboard context: XCB - couldn't establish conection: DisplayParsingError(DisplayNotSet)

For now I'll build a version without clipboard support (thank you for making it optional).

[eatradish]

Try #226 ?

[NickPancakes]

Running into this as well, and can confirm #226 works for me. Thanks!

[tirsek]

Works for me; the panic is once again replaced with a warning:

[2025-01-02T15:15:50Z WARN  rbw_agent::agent] couldn't create clipboard context: Unknown error while interacting with the clipboard: X11 server connection timed out because it was unreachable

It also works fine on my Wayland system.