Better release.sh script

It exports from git now, so no removing files is required cause it uses export-ignore from .gitattributes
It also allows edits before release is packed
Usage: ./release.sh prepare
Then:
./release.sh pack

release.sh

@@ -5,11 +5,21 @@
 # places compressed archives into releases/ directory
 #
 
+if [ $# -eq 0 ]; then
+	echo "No arguments supplied"
+	echo "Usage: release.sh prepare/pack"
+	exit 1
+fi
+
+if [ $1 = "prepare" ]; then
 	# define release version
 	version=`cat VERSION`
 
 	echo "Preparing to release version $version of the MyAAC Project!"
 
+	# get myaac from git archive
+	git archive --format zip --output tmp/myaac.zip master
+
 	# make required directories
 	mkdir -p releases
 	mkdir -p tmp && cd tmp
@@ -17,43 +27,37 @@ mkdir -p tmp && cd tmp
 	dir="myaac-$version"
 	if [ -d "$dir" ] ; then
 		echo "Fatal error: Version $version already exists!!"
+		exit
 	fi
 
-# make version directory
+	unzip -q myaac.zip -d $dir
-mkdir "$dir"
+	rm myaac.zip
 
-# copy all AAC files into new created directory
+	echo "Now you can make changes to $dir. When you are ready, type 'release.sh pack'"
-echo "Copying required files.."
+	exit
-cd .. # we are now in the main directory
+fi
 
-shopt -s dotglob # turn on hidden files with *
+if [ $1 = "pack" ]; then
-#cp -r * "tmp/$dir"
+	# define release version
-rsync -Rr --info=progress2 . "tmp/$dir"
+	version=`cat VERSION`
 
-cd "tmp/$dir"
+	cd tmp
-
-# remove unneeded files
-echo "Removing unneeded files.."
-rm -rf .git .github .idea
-rm .gitattributes .gitignore
-rm release.sh
-rm _config.yml
-rm -Rf releases
-rm -Rf tmp
 
 	# tar.gz
 	echo "Creating .tar.gz package.."
 	file="myaac-$version.tar.gz"
 	tar -czf $file *
-mv $file ../../releases/
+	mv $file ../releases/
 
 	# zip
 	echo "Creating .zip package.."
 	file="myaac-$version.zip"
 	zip -rq $file *
-mv $file ../../releases/
+	mv $file ../releases/
 
-cd ../..
+	cd ..
-shopt -u dotglob
 	rm -R tmp
 	echo "Done. Released files can be found in 'releases' directory."
+
+	exit
+fi