Fix clipboard watcher lifecycle

shell/plugins/clipboard/watch.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+set -o pipefail
+
+capture_script=${1:-}
+[[ -n $capture_script && -x $capture_script ]] || exit 1
+
+owner_pid=$PPID
+watchdog_pid=""
+
+cleanup() {
+  local pid
+
+  if [[ -n $watchdog_pid ]]; then
+    kill "$watchdog_pid" 2>/dev/null || true
+  fi
+
+  for pid in $(jobs -p); do
+    [[ $pid == $watchdog_pid ]] && continue
+    kill "$pid" 2>/dev/null || true
+  done
+
+  wait 2>/dev/null || true
+}
+
+stop() {
+  cleanup
+  exit 0
+}
+
+trap cleanup EXIT
+trap stop HUP INT TERM
+
+(
+  while kill -0 "$owner_pid" 2>/dev/null; do
+    sleep 1
+  done
+
+  kill -TERM "$$" 2>/dev/null || true
+) &
+watchdog_pid=$!
+
+OMARCHY_CLIPBOARD_WATCH_MIME=text wl-paste --type text --watch "$capture_script" 2>/dev/null &
+OMARCHY_CLIPBOARD_WATCH_MIME=image/png wl-paste --type image/png --watch "$capture_script" 2>/dev/null &
+
+wait