add tmux plugin copycat

.tmux/copycat/scripts/copycat_mode_bindings.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+source "$CURRENT_DIR/helpers.sh"
+
+# Extends a keyboard key.
+# Benefits: tmux won't report errors and everything will work fine even if the
+# script is deleted.
+extend_key() {
+	local key="$1"
+	local script="$2"
+
+	# 1. 'key' is sent to tmux. This ensures the default key action is done.
+	# 2. Script is executed.
+	# 3. `true` command ensures an exit status 0 is returned. This ensures a
+	#	 user never gets an error msg - even if the script file from step 2 is
+	#	 deleted.
+	tmux bind-key -n "$key" run-shell "tmux send-keys '$key'; $script; true"
+}
+
+copycat_cancel_bindings() {
+	# keys that quit copy mode are enhanced to quit copycat mode as well.
+	local cancel_mode_bindings=$(copycat_quit_copy_mode_keys)
+	local key
+	for key in $cancel_mode_bindings; do
+		extend_key "$key" "$CURRENT_DIR/copycat_mode_quit.sh"
+	done
+}
+
+copycat_mode_bindings() {
+	extend_key "$(copycat_next_key)" "$CURRENT_DIR/copycat_jump.sh 'next'"
+	extend_key "$(copycat_prev_key)" "$CURRENT_DIR/copycat_jump.sh 'prev'"
+}
+
+main() {
+	copycat_mode_bindings
+	copycat_cancel_bindings
+}
+main