Fix mac error in scripts/run-docker.sh

scripts/run-docker.sh

@@ -2,7 +2,8 @@
 set -e -u
 
 HOME=/home/builder
-if [ `uname` = Darwin ]; then
+UNAME=$(uname)
+if [ "$UNAME" = Darwin ]; then
 	# Workaround for mac readlink not supporting -f.
 	REPOROOT=$PWD
 else
@@ -25,6 +26,7 @@ docker start $CONTAINER_NAME > /dev/null 2> /dev/null || {
 	       --volume $REPOROOT:$HOME/termux-packages \
 	       --tty \
 	       $IMAGE_NAME
+    if [ "$UNAME" != Darwin ]; then
         if [ $(id -u) -ne 1000 -a $(id -u) -ne 0 ]
         then
             echo "Changed builder uid/gid... (this may take a while)"
@@ -33,6 +35,7 @@ docker start $CONTAINER_NAME > /dev/null 2> /dev/null || {
             docker exec --tty $CONTAINER_NAME usermod -u $(id -u) builder
             docker exec --tty $CONTAINER_NAME groupmod -g $(id -g) builder
         fi
+    fi
 }
 
 if [ "$#" -eq  "0" ]; then