67 lines
2.4 KiB
Bash
67 lines
2.4 KiB
Bash
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#!/bin/bash
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set -eu
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is_app_installed() {
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type "$1" &>/dev/null
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}
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# get data either form stdin or from file
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buf=$(cat "$@")
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copy_backend_remote_tunnel_port=$(tmux show-option -gvq "@copy_backend_remote_tunnel_port")
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copy_use_osc52_fallback=$(tmux show-option -gvq "@copy_use_osc52_fallback")
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# Resolve copy backend: pbcopy (OSX), reattach-to-user-namespace (OSX), xclip/xsel (Linux)
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copy_backend=""
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if is_app_installed pbcopy; then
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copy_backend="pbcopy"
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elif is_app_installed reattach-to-user-namespace; then
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copy_backend="reattach-to-user-namespace pbcopy"
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elif [ -n "${DISPLAY-}" ] && is_app_installed xsel; then
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copy_backend="xsel -i --clipboard"
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elif [ -n "${DISPLAY-}" ] && is_app_installed xclip; then
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copy_backend="xclip -i -f -selection primary | xclip -i -selection clipboard"
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elif [ -n "${copy_backend_remote_tunnel_port-}" ] && [ "$(ss -n -4 state listening "( sport = $copy_backend_remote_tunnel_port )" | tail -n +2 | wc -l)" -eq 1 ]; then
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copy_backend="nc localhost $copy_backend_remote_tunnel_port"
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fi
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# if copy backend is resolved, copy and exit
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if [ -n "$copy_backend" ]; then
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printf "$buf" | eval "$copy_backend"
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exit;
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fi
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# If no copy backends were eligible, decide to fallback to OSC 52 escape sequences
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# Note, most terminals do not handle OSC
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if [ "$copy_use_osc52_fallback" == "off" ]; then
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exit;
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fi
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# Copy via OSC 52 ANSI escape sequence to controlling terminal
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buflen=$( printf %s "$buf" | wc -c )
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# https://sunaku.github.io/tmux-yank-osc52.html
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# The maximum length of an OSC 52 escape sequence is 100_000 bytes, of which
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# 7 bytes are occupied by a "\033]52;c;" header, 1 byte by a "\a" footer, and
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# 99_992 bytes by the base64-encoded result of 74_994 bytes of copyable text
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maxlen=74994
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# warn if exceeds maxlen
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if [ "$buflen" -gt "$maxlen" ]; then
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printf "input is %d bytes too long" "$(( buflen - maxlen ))" >&2
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fi
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# build up OSC 52 ANSI escape sequence
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esc="\033]52;c;$( printf %s "$buf" | head -c $maxlen | base64 | tr -d '\r\n' )\a"
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esc="\033Ptmux;\033$esc\033\\"
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# resolve target terminal to send escape sequence
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# if we are on remote machine, send directly to SSH_TTY to transport escape sequence
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# to terminal on local machine, so data lands in clipboard on our local machine
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pane_active_tty=$(tmux list-panes -F "#{pane_active} #{pane_tty}" | awk '$1=="1" { print $2 }')
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target_tty="${SSH_TTY:-$pane_active_tty}"
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printf "$esc" > "$target_tty"
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