Remove shellcheck warnings from vimplugin

.scripts/vimplugin.sh

@@ -39,13 +39,13 @@ EOF
 }
 
 init() {
-	sudo mkdir -p $START
-	sudo mkdir -p $OPT
-	sudo touch $LIST
-	if [ ! -s $LIST ]; then
+	sudo mkdir -p "$START"
+	sudo mkdir -p "$OPT"
+	sudo touch "$LIST"
+	if [ ! -s "$LIST" ]; then
 		# Append to empty file
-		sudo sh -c 'echo "start:" >> '$LIST
-		sudo sh -c 'echo "opt:" >> '$LIST
+		sudo sh -c 'echo "start:" >> '"$LIST"
+		sudo sh -c 'echo "opt:" >> '"$LIST"
 	fi
 }
 
@@ -54,7 +54,7 @@ list() {
 		echo "Listing all installed plugins.."
 	fi
 
-	PLUGIN="$(find $DIR -mindepth 2 -maxdepth 2 \
+	PLUGIN="$(find "$DIR" -mindepth 2 -maxdepth 2 \
 		| sort | awk -F '/' '{ print $(NF-1)"/"$NF }')"
 	NUM=0
 	for p in $PLUGIN; do
@@ -70,23 +70,23 @@ list() {
 
 install() {
 	# Check if correct git URL
-	if [ -z "$(echo $1 | sed -nr \
+	if [ -z "$(echo "$1" | sed -nr \
 		's/^https:\/\/github\.com\/(.*\/.*).git$/\1/p')" ]; then
 		echo "script: url invalid: $1"
 	else
 		# cd to correct directory if called from the CLI
 		if [ -z "$2" ]; then
 			# Default is directory 'start'
-			cd "$START"
+			cd "$START" || exit
 		elif [ "$2" = "start" ]; then
-			cd "$START"
+			cd "$START" || exit
 		elif [ "$2" = "opt" ]; then
-			cd "$OPT"
+			cd "$OPT" || exit
 		fi
 
-		REPO="$(basename $1 .git)"
+		REPO="$(basename "$1" .git)"
 		if [ -d "$REPO" ]; then
-			cd "$REPO"
+			cd "$REPO" || exit
 			sudo git pull --force 1> /dev/null
 			cd ".."
 			echo "Updated: $REPO"
@@ -96,13 +96,13 @@ install() {
 			# Add git URL to config file
 			if [ -z "$2" ]; then
 				# Append before 'opt:'
-				sudo sed -i '/opt:/ i '$1 $LIST
+				sudo sed -i '/opt:/ i '"$1" "$LIST"
 			elif [ "$2" = "start"  ]; then
 				# Append before 'opt:'
-				sudo sed -i '/opt:/ i '$1 $LIST
+				sudo sed -i '/opt:/ i '"$1" "$LIST"
 			elif [ "$2" = "opt" ]; then
 				# Append at the end of the file
-				sudo sed -i '$ a '$1 $LIST
+				sudo sed -i '$ a '"$1" "$LIST"
 			fi
 
 			echo "Installed: $REPO"
@@ -115,30 +115,30 @@ update() {
 
 	init
 
-	cd $START
-	while read l; do
+	cd "$START" || exit
+	while read -r l; do
 		if [ "$l" = "start:"  ]; then
-			cd "$START"
+			cd "$START" || exit
 		elif [ "$l" = "opt:"  ]; then
-			cd "$OPT"
+			cd "$OPT" || exit
 		else
-			install $l "script"
+			install "$l" "script"
 		fi
-	done < $LIST
+	done < "$LIST"
 }
 
 remove() {
 	list
 	echo -n "Enter the number to remove: "
-	read OPTION
+	read -r OPTION
 
-	if [ -z "$(echo $OPTION | sed -nr 's/^([0-9]+)$/\1/p')" ]; then
+	if [ -z "$(echo "$OPTION" | sed -nr 's/^([0-9]+)$/\1/p')" ]; then
 		echo "Please select a number"
 	else
-		TO_REMOVE="$(list $OPTION)"
+		TO_REMOVE="$(list "$OPTION")"
 		if [ -n "$TO_REMOVE" ]; then
-			sudo rm -rf $DIR/$TO_REMOVE
-			sudo sed -i '/'"$(basename $TO_REMOVE)"'\.git/d' $LIST
+			sudo rm -rf "$DIR/$TO_REMOVE"
+			sudo sed -i '/'"$(basename "$TO_REMOVE")"'\.git/d' "$LIST"
 		fi
 	fi
 }