pi-build/patch/test-patch

#!/bin/bash

#This test-patch script should serve as a 
#template for future patch scripts.
#20210805 KM4ACK

HEADER(){
clear;echo;echo "====================="
echo "Build a Pi Patch Tool"
echo "====================="
}

PATCHNAME=test-patch20210805
PATCHFILE=$HOME/.config/patch
touch $PATCHFILE

#check to see if patch already applied
PATCHCHECK=$(grep "$PATCHNAME" $PATCHFILE)

#if not, then apply the patch
if [ -z $PATCHCHECK ]; then
clear;echo;echo
echo "This is a test patch"
echo "$PATCHNAME" >> $PATCHFILE
sleep 3
bash $HOME/pi-build/patch/patch
else
#if patch previously applied, notify user and exit
clear;echo;echo
HEADER
echo "$PATCHNAME already applied to this system"
sleep 3
bash $HOME/pi-build/patch/patch
fi