kill existing unity processes before attempting build

ci/build.sh

@@ -3,10 +3,18 @@
 # $1    UNITY_VERSION
 unityversion=$1
 
+editorlogpath="$HOME/Library/Logs/Unity/Editor.log"
 editorpath="/Applications/Unity/Hub/Editor/$unityversion/Unity.app"
 
+# find and kill existing unity instances
+if pgrep -x Unity
+then
+    echo "terminating existing unity processes..."
+    kill $(pgrep Unity)
+fi
+
 # remove previous Editor.log
-editorlogpath="$HOME/Library/Logs/Unity/Editor.log"
+echo "removing previous editor log..."
 [ -f $editorlogpath ] && rm $editorlogpath
 
 echo "starting build using unity v$unityversion..."
@@ -21,12 +29,11 @@ open -g $editorpath --args \
     -projectPath "$(pwd)/game"
 
 # wait for unity to exit
-while pgrep -x "Unity" > /dev/null
+while pgrep -x Unity > /dev/null
 do
     sleep 1
 done
 
-
 if [ -f $editorlogpath ]; then
     echo "build completed, dumping log"
     cat $editorlogpath