CopyAnywhere

LAN clipboard sync for Windows, macOS, and Linux.

Current scope

• Text clipboard sync only.
• Manual file sending is available through the CLI, and the tray UI can send a selected file to an online trusted device.
• Automatic peer discovery over UDP broadcast on the local network.
• Encrypted transport with self-signed TLS certificates.
• Pairing trust persisted locally after confirmation.
• Local control plane for status, pause, resume, and stop.

Run

ca run

Start the tray app instead of the plain CLI service:

ca tray

On Windows, the default build already includes tray support. On Linux and macOS, build with --features desktop-ui when you want tray/dialog support.

Useful flags:

ca run --pairing prompt
ca run --pairing auto-accept

Query the running service:

ca status
ca config

Pause or resume sync without stopping the process:

ca pause
ca resume

Ask the running service to exit:

ca stop

Manually test file transfer to an already paired peer:

ca send-file t480 ./example.txt
ca send-file dd7b1e4a-2bd9-4a4c-a7d7-92f134863ef1 ./example.txt
ca send-file 192.168.1.10:37848 ./example.txt
ca send-files t480 ./a.txt ./b.txt
ca received-files
ca copy-received
ca copy-received 1
ca copy-received example.txt
ca open-received
ca open-received 1
ca reveal-received
ca reveal-received example.txt
ca open-inbox
ca prune-received-history
ca clear-received-history
ca transfers
ca retry-failed-transfer
ca retry-failed-transfer 1
ca clear-transfer-history

List trusted peers:

ca trust

Remove one trusted peer:

ca unpair <device-id>

Clear all trusted peers:

ca reset-trust
ca set-device-name my-laptop
ca set-pairing prompt
ca set-pairing auto-accept
ca autostart
ca enable-autostart
ca disable-autostart
ca set-listen-port 37848
ca set-discovery-port 37847
ca set-control-port 37849
ca reload-config
ca doctor
ca self-test
ca regression-test
ca export-diagnostics

Build release artifacts:

pwsh ./packaging/package-windows.ps1
sh ./packaging/package-macos.sh
sh ./packaging/package-linux.sh

Windows packaging details:

• build.rs embeds Windows version metadata into ca.exe.
• packaging/package-windows.ps1 produces:
  • dist/windows/portable/
  • dist/windows/ca-windows-portable.zip
  • dist/windows/installer/ca-setup.exe when Inno Setup iscc is installed
• packaging/ca.iss is the Inno Setup script used for the installer build.
• When you bump the app version, update both Cargo.toml and packaging/ca.iss.

Notes

• Each machine must run CopyAnywhere in the foreground or as a background process.
• Pairing confirmation now prefers a desktop dialog; terminal input is only used as a fallback when no GUI dialog is available.
• Clipboard sync uses the system clipboard, so users still paste with the native Ctrl+V or platform equivalent.
• The default config directory is the conf/ directory next to the ca executable unless --config-dir is provided.
• run also starts a local control socket on 127.0.0.1:37849 by default; status, pause, resume, and stop talk to that control plane.
• config prints the persisted device settings, config directory, and autostart entry path.
• set-device-name updates the stored device name. Restart the service afterward so discovery broadcasts and TLS identity metadata reflect the new name everywhere.
• set-pairing switches between prompt and auto-accept. This takes effect immediately when the service is already running.
• autostart, enable-autostart, and disable-autostart manage per-user startup entries:
  • Windows: %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\ca-tray.cmd
  • macOS: ~/Library/LaunchAgents/com.copyanywhere.ca.plist
  • Linux: ~/.config/autostart/ca.desktop
• reload-config reloads mutable settings from config.json into the running service. Port changes still require a restart because listeners are already bound.
• set-listen-port and set-discovery-port update the stored ports. If the service is running, the change is saved immediately but takes effect only after a restart.
• set-control-port updates the stored control port for the next launch. Change it while the service is stopped, or restart immediately after changing it.
• doctor prints a diagnostic summary including config, runtime status, active transfers, recent warnings/errors, and Linux clipboard environment variables.
• self-test performs executable local checks for config/inbox writability, clipboard availability, autostart entry resolution, and control-plane reachability.
• regression-test creates a temporary isolated config, starts a local ca service instance, verifies control-plane operations, config reload, history read/write, file chunking, diagnostics export, and graceful shutdown, then removes the temp workspace.
• export-diagnostics writes a JSON report under the active config directory's diagnostics/ subdirectory.
• tray shows online devices and trusted devices in submenus, can forget trusted peers, exposes a Settings submenu for device name, listen/discovery ports, pairing policy, autostart, Open Config File, and Reload Config, and uses desktop dialogs for pair requests plus key runtime errors and pause/resume feedback.
• send-file and send-files accept a device name, device id, or raw ip:port. In tray mode, Send File shows online trusted devices and opens a native multi-file picker before sending.
• Batch sends now report per-file progress in the CLI and show start/completion notifications in tray mode.
• The tray now shows live Active Transfers with progress percentages and a Recent Diagnostics submenu with the latest warnings/errors.
• The tray also shows a compact top-level health summary derived from runtime failure counters.
• regression-test is intentionally single-machine. It does not prove LAN discovery, cross-machine pairing, or real remote clipboard/file transfer.
• In tray mode, incoming file transfers ask for confirmation first and let the user choose a save location. In plain CLI mode, incoming files continue to land in the default inbox automatically.
• Received files are tracked in an inbox manifest with file name, size, source device, timestamp, and stored path metadata.
• On macOS, a newly received file is also published to the local file clipboard automatically, so the user can paste it into Finder or another file target immediately after receipt.
• On Linux, file clipboard publishing now works as a best-effort bridge through wl-copy or xclip when one of those tools is available in the desktop session.
• On Windows, file clipboard publishing now works through a PowerShell/STA clipboard bridge, so received files can be pasted into Explorer or another file target in a normal desktop session.
• copy-received publishes a received file back to the local file clipboard by latest item, 1-based index, transfer id, file name, or stored path.
• open-received opens a received file locally by latest item, 1-based index, transfer id, file name, or stored path.
• reveal-received reveals a received file in the local file manager.
• open-inbox opens the local inbox directory.
• prune-received-history removes manifest entries whose files no longer exist on disk.
• clear-received-history clears the received-file manifest history without deleting the files themselves.
• transfers lists recent send/receive outcomes from the transfer history.
• retry-failed-transfer retries a recent failed send by latest item, 1-based index, transfer id, file name, peer id, peer name, or source path.
• clear-transfer-history clears the transfer-history log.
• The tray can also prune missing history entries, clear received history, and open, reveal, or copy recent received files directly.
• The tray also shows a recent transfer summary submenu, can clear transfer history, and offers Retry ... for recent failed sends.
• The tray can open the active config directory directly. Device-name editing is still CLI-driven because the current desktop dependency set does not include a cross-platform text-input dialog.
• From the tray, changing the device name is immediate in config but still requires a service restart before other peers see the new identity everywhere.
• From the tray, changing the listen or discovery port saves the new value and reminds you to restart the service. The control port remains a CLI/config-file setting because the live control socket cannot move transparently.
• Local file clipboard publishing is implemented on macOS, as a best-effort bridge on Linux, and through PowerShell on Windows.
• Desktop UI is enabled by default on Windows builds. On Linux and macOS, default builds stay CLI-only; use --features desktop-ui when you want tray dialogs and are willing to satisfy the platform GUI dependencies.
• The packaging scripts create simple dist/<platform>/ folders with the built binary and README.md; they do not yet perform code signing or produce native installers.
• Windows packaging now includes a native Inno Setup installer script, but code signing is still not configured.