Downloading a specific directory from Github

getGitDir.sh

#!/bin/bash

#usage:
#arg1: directory where you want to save the specific sub dir from repo
#arg2: the repo clone url
#arg3: name of the specific directory
#ex: ./getGitDir.sh <outputdir> <cloneurl> <targetdir>
#get no of args passed
TOTALARGS="$#"
if [[ $TOTALARGS -lt 3 ]]; then
	echo "$# arguments specified, required 3 :("
	echo "arg1: outdir, arg2: git repo url, arg3: target directory"
	exit 1
fi
#dir to save template, git url of repo, template name
DIR="$1"
GITURL="$2"
TARGETDIR=$"$3"

#check whether directory exits
if [[ ! -d "$DIR" ]]; then
	#make dir
	mkdir "$DIR"
	#get inside the folder
	cd $DIR
	#git init
	git init
	#set origin
	git remote add -f origin $GITURL
fi

#get inside the folder
cd $DIR

#perform sparse checkout
git config core.sparsecheckout true
echo "$TARGETDIR" >> .git/info/sparse-checkout
git checkout master
git pull origin master