Opencart 3.0.2.0 duplicate default theme

duplicate.sh

#!/bin/bash

if [ "$#" -ne 3 ] || ! [ -d "$1" ]; then
  echo "Usage: $0 THEMEDIR $1 ADMINDIR $2 COPYNAME" >&2
  exit 1
fi

#The admin controller needs a capitalized theme name
function capitalize_first(){
  string0=$COPY
  firstchar=${string0:0:1}
  string1=${string0:1}
  FirstChar=`echo "$firstchar" | tr a-z A-Z`
  CAPITALIZEDCOPY="$FirstChar$string1"
}


THEMEDIR=$1
ADMINDIR=$2
COPY=$3


capitalize_first

echo "Duplicating default theme"
cp -R $THEMEDIR"/default" $THEMEDIR"/"$COPY

echo "renaming theme image"
mv $THEMEDIR"/"$COPY"/image/default.png" $THEMEDIR"/"$COPY"/image/"$COPY".png"

echo "fix css include dir"
sed -i "s/default/${COPY}/g" $THEMEDIR"/"$COPY"/template/common/header.twig"

echo "copy admin controller and rename"
cp $ADMINDIR"/controller/extension/theme/default.php" $ADMINDIR"/controller/extension/theme/"$COPY.php
sed -i "s/default/${COPY}/g" $ADMINDIR"/controller/extension/theme/"$COPY".php"
sed -i "s/Default/${CAPITALIZEDCOPY}/g" $ADMINDIR"/controller/extension/theme/"$COPY".php"

echo "copy language file"
cp $ADMINDIR"/language/en-gb/extension/theme/default.php" $ADMINDIR"/language/en-gb/extension/theme/"$COPY".php"
sed -i "s/default/${COPY}/g" $ADMINDIR"/language/en-gb/extension/theme/"$COPY".php"
sed -i "s/Default/${CAPITALIZEDCOPY}/g" $ADMINDIR"/language/en-gb/extension/theme/"$COPY".php"


echo "copy admin view file"
cp $ADMINDIR"/view/template/extension/theme/default.twig" $ADMINDIR"/view/template/extension/theme/"$COPY".twig"
sed -i "s/default/${COPY}/g" $ADMINDIR"/view/template/extension/theme/"$COPY".twig"