local/bin/homesync: Only generate data index when dataroot is non-empty

.local/bin/homesync

@@ -58,32 +58,34 @@ message() {
 	echo -e "$YELLOW:: $@$NORMAL"
 }
 
-section Data index
-for i in "$OPT_DATAROOT"/*; do
-	mkdir -p ~/personal/index/
-	case "$i" in
-	*/locate.db|*/lost+found|*/Sync*)
-		continue ;;
-	*/games|*/videos)
-		for j in "$i"/*; do
-			folder=$(basename $(dirname "$j"))
-			mkdir -p ~/personal/index/"$folder"
-			dataindex "$j" > ~/personal/index/"$folder"/"$(basename "$j")".index
-			unset folder
-		done
-		continue ;;
-	*/personal_data)
-		for j in "$i"/*; do
-			mkdir -p ~/personal/index/personal_data
-			## TODO: Discard empty results?
-			dataindex "$j" | gpg --encrypt --recipient mail@ambrevar.xyz \
-													 --output - > ~/personal/index/personal_data/"$(basename "$j")".index.gpg
-		done
-		continue ;;
-	*)
-		dataindex "$i" > ~/personal/index/"$(basename "$i")".index ;;
-	esac
-done
+if [ -n "$OPT_DATAROOT" ]; then
+	section Data index
+	for i in "$OPT_DATAROOT"/*; do
+		mkdir -p ~/personal/index/
+		case "$i" in
+		*/locate.db|*/lost+found|*/Sync*)
+			continue ;;
+		*/games|*/videos)
+			for j in "$i"/*; do
+				folder=$(basename $(dirname "$j"))
+				mkdir -p ~/personal/index/"$folder"
+				dataindex "$j" > ~/personal/index/"$folder"/"$(basename "$j")".index
+				unset folder
+			done
+			continue ;;
+		*/personal_data)
+			for j in "$i"/*; do
+				mkdir -p ~/personal/index/personal_data
+				## TODO: Discard empty results?
+				dataindex "$j" | gpg --encrypt --recipient mail@ambrevar.xyz \
+														 --output - > ~/personal/index/personal_data/"$(basename "$j")".index.gpg
+			done
+			continue ;;
+		*)
+			dataindex "$i" > ~/personal/index/"$(basename "$i")".index ;;
+		esac
+	done
+fi
 
 if [ -n "$OPT_DEVICE" ]; then
 	section "GnuPG"