refactor: new system basics

utils/clipboard_background_manager.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+HISTORY_LENGTH=8
+HISTORY_FILE_PATH=~/.tmp/clipboard_history.txt
+
+touch $HISTORY_FILE_PATH >/dev/null
+
+while clipnotify; do
+    new_clip=$(xsel -b -o)
+    is_found=$(grep -Fx "$new_clip" $HISTORY_FILE_PATH)
+    if [ ${#is_found} -eq 0 ]; then
+        echo "$new_clip" >> $HISTORY_FILE_PATH
+        file_size=$(wc -l < $HISTORY_FILE_PATH)
+        if [ $file_size -gt $HISTORY_LENGTH ]; then
+            sed -i '1d' $HISTORY_FILE_PATH
+        fi
+    fi
+done