Do not allow local remote sync while remote local is in progress

scripts/watch-build.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 CACHE_FILE=".build-cache"
+REMOTE_PROGRESS=".remote-in-progress"
 
 needs_build() {
     # If cache file doesn't exist, require build
@@ -45,6 +46,11 @@ upload() {
 }
 
 if [ "$1" = "--upload" ]; then
+	if [ -f $REMOTE_PROGRESS ]; then
+		echo "Waiting for remote-local.sh to finish..."
+		exit 0
+	fi
+
     upload
     exit 0
 fi