Makes /main/foldersub/foldersub#.pde structure

build_two.sh

#! /bin/bash
#This is a bash script used for creating a lot of folders to experiment in Processing!
#It asks for the input of the main folder... this folder will hold all of the Processing sub folders for example
#If mainfolder is called cupcake and you name the processing folders icings and you want three made
#the bash script will create:
#	cupcake/icings0/icings0.pde
#	cupcake/icings1/icings1.pde
#	cupcake/icings2/icings2.pde


function isNull {
	#if variable is null return true, else return false
	if [ -z "$1" ]
		then
			return 0
		else
			return 1
	fi
}

#superfolder
echo 'name of the main processing folders you wish to create...'
read MAINFOLDER

#check if null...
if isNull $MAINFOLDER; then 
   exec >&2; echo "error: Main Folder name was not set..."; exit 1
fi

#check if string...
if ! [[ "$MAINFOLDER" =~ ^[a-zA-Z][a-zA-Z0-9]+$ ]] ; then
   exec >&2; echo "error: Main Folder was not a string"; exit 1
fi

#folder name
echo 'Please input the name of the Processing folders you wish to create...'
read FOLDERNAME

#check if null...
if isNull $FOLDERNAME; then 
   exec >&2; echo "error: Folder name was not set..."; exit 1
fi

#check if string...
if ! [[ "$FOLDERNAME" =~ ^[a-zA-Z]+$ ]] ; then
   exec >&2; echo "error: Not a string"; exit 1
fi

#number of sub folders
echo 'Please input the number of sub folders you wish to create...'
read NUMBEROFFOLDERS
#$((NUMBEROFFOLDERS))

#check if null
if isNull $NUMBEROFFOLDERS; then 
   exec >&2; echo "error: Number of folders was not set..."; exit 1
fi

#not a number
if ! [[ "$NUMBEROFFOLDERS" != *[!0-9]* ]] ; then
   exec >&2; echo "error: Not a number"; exit 1
fi

#if ! [[ "$NUMBEROFOLDERS" == ^0+$ ]] ; then
#   exec >&2; echo "error: Number cannot just be zero"; exit 1
#fi

#create the number of sub folders
COUNTER=0
while [ $COUNTER -lt "$NUMBEROFFOLDERS" ]; do
	#check if the directory exists
	mkdir -p "$MAINFOLDER/$FOLDERNAME/$FOLDERNAME$COUNTER"
	touch "$MAINFOLDER/$FOLDERNAME/$FOLDERNAME$COUNTER/$FOLDERNAME$COUNTER.pde"
	echo "Created $MAINFOLDER/$FOLDERNAME/$FOLDERNAME$COUNTER/$FOLDERNAME$COUNTER.pde..."
	let "COUNTER = COUNTER+1"
done

echo 'Complete!'

exit 0