i3 - winrule script

#!/bin/bash
ID="$(xprop -root _NET_ACTIVE_WINDOW | cut -d' ' -f5)"
CLASS=$(xprop -id $ID WM_CLASS | cut -d'"' -f2)
NAME=$(xprop -id $ID WM_NAME | cut -d'"' -f2)

CFG=$(mktemp)
echo "# Choose command or define your own" >> $CFG
echo "#COMMAND=kill" >> $CFG
echo "#COMMAND='move window to workspace \$ws'" >> $CFG
echo "#COMMAND='floating enable'" >> $CFG
echo "# Remove properties you do not want to create rule for" >> $CFG
echo "WM_CLASS='${CLASS}'" >> $CFG
echo "WM_NAME='${NAME}'" >> $CFG
vim $CFG
source $CFG
RULE="for_window ["
if [ "$WM_CLASS" != "" ]; then
    RULE="$RULE class=\"^$WM_CLASS\$\""
fi
if [ "$WM_NAME" != "" ]; then
    RULE="$RULE title=\"^$WM_NAME\$\""
fi
RULE="$RULE] $COMMAND"
CFG=$(mktemp)
echo "#Is it right? Modify the rule or delete it to abort." >> $CFG
echo "i3rule='$RULE'" >> $CFG
vim $CFG
source $CFG
if [ "$i3rule" = "" ]; then
    echo "Aborted."
    exit
fi
echo "Backing up i3 config as config.backup"
cp -f ~/.config/i3/config ~/.config/i3/config.backup
echo "Adding rule: $i3rule"
CMD='sed -i '"'"'s/#$GENERATED_RULES$#/#$GENERATED_RULES$#\n'"$i3rule"'/g;'"'"' ~/.config/i3/config'
#echo "$CMD"
eval $CMD
echo "Done."