add progress bar to tar

src/glacier

@@ -51,7 +51,7 @@ int_check() {
 unpack_pkg() {
 	printf "$blue[ i ]$reset Unpacking $2.tar.gz...\n"
 	mkdir $2 && mv $2.tar.gz $2 && cd $2
-	tar -xf $2.tar.gz
+	pv $2.tar.gz | tar -xz
 		if [ "$?" != "0" ]; then
 			printf "$red[ $error ]$reset Could not unpack $2.tar.gz.\n"
 			cd .. && rm -rf $2