fixing java command line options for 'go' MaxPermSize -> MetaspaceSize in java 8

Author: lukeis

go

@@ -4,7 +4,16 @@
 unset GEM_HOME
 unset GEM_PATH
 
-JAVA_OPTS="-client"
+JAVA_OPTS="-client -Xmx2048m -XX:ReservedCodeCacheSize=256m"
 
-java $JAVA_OPTS -Xmx2048m -XX:MaxPermSize=1024m -XX:ReservedCodeCacheSize=256m -jar third_party/jruby/jruby-complete.jar -X-C -S rake $*
+java_version=`java -version 2>&1 | sed 's/java version "1\.\(.*\)\..*"/\1/; 1q'`
+
+if [[ "$java_version" > 7 ]]
+then
+  JAVA_OPTS="$JAVA_OPTS -XX:MetaspaceSize=1024m"
+else
+  JAVA_OPTS="$JAVA_OPTS -XX:MaxPermSize=1024m"
+fi
+
+java $JAVA_OPTS -jar third_party/jruby/jruby-complete.jar -X-C -S rake $*