Fell back to the PowerShell clipboard bridge when the native Windows clipboard reader reports no image, preserving Ctrl+V image paste in PowerShell terminals.\n\nFixes #2429
The native arboard backend cannot retain X11 / Wayland selection ownership
after the calling process exits, and for short-lived napi calls it can drop
ownership before any consumer sees the selection — leaving the clipboard
empty even though set_text returned success. tmux + QTerminal made this
visible because OSC 52 is also dropped by libqtermwidget, so both backends
fail and the UI's 'Copied to clipboard' status reads as a lie.
utils/clipboard.ts now:
- Tries wl-copy / xclip / xsel before arboard on Linux. These CLIs fork
after reading stdin and serve the selection until another app claims it,
so the payload survives our process exit.
- Honors OMP_CLIPBOARD_COMMAND as a shell-string escape hatch (e.g.
`xclip -selection clipboard -in -silent`).
- Logs a single warning when every backend fails, so the silent-success
regression from #2075 cannot recur unnoticed.
Tests assert dispatch order: Linux+X11 prefers xclip, Wayland prefers
wl-copy, xclip→xsel fallback works, all-fail falls back to native,
macOS still goes straight to native, and OMP_CLIPBOARD_COMMAND wins
over the CLI chain.
Fixes#2075
- Raised PowerShell timeout to 8s and swallowed reap errors to prevent unhandled throws on WSL interop.
- Fixed fallback logic so arboard is skipped when no display server is present on headless WSL.
- Added test coverage for the headless WSL short-circuit path.
WSLg exposes WAYLAND_DISPLAY, so readImageFromClipboard() took the
native arboard path on WSL2. arboard::Clipboard::get_image() returns
ContentNotAvailable on WSLg because the Wayland clipboard does not
carry image payloads from the Windows clipboard, and that surfaced as
silent 'No image in clipboard' on Ctrl+V.
Detect WSL via WSL_DISTRO_NAME / WSL_INTEROP and read the image with a
PowerShell one-liner that emits base64-encoded PNG bytes from
[System.Windows.Forms.Clipboard]::GetImage(). Fall back to the native
bridge when PowerShell returns nothing, exits non-zero, or is missing,
so non-WSLg Wayland setups continue working unchanged.
Fixes#1280
roboomp