Embedded javascript plugins (#1393)

pkg/plugin/js/util.go

@@ -0,0 +1,22 @@
+package js
+
+import (
+	"time"
+
+	"github.com/robertkrimen/otto"
+)
+
+func sleepFunc(call otto.FunctionCall) otto.Value {
+	arg := call.Argument(0)
+	ms, _ := arg.ToInteger()
+
+	time.Sleep(time.Millisecond * time.Duration(ms))
+	return otto.UndefinedValue()
+}
+
+func AddUtilAPI(vm *otto.Otto) {
+	util, _ := vm.Object("({})")
+	util.Set("Sleep", sleepFunc)
+
+	vm.Set("util", util)
+}