add comment and let multi values to the log to make it easy to log. (#788)

* add comment and let multi values to the log to make it easy to log.

* added WorkingDirectory to lua bindings (returns the current directory)

cmd/micro/messenger.go

@@ -70,9 +70,11 @@ type Messenger struct {
 	gutterMessage bool
 }
 
-func (m *Messenger) AddLog(msg string) {
+// AddLog sends a message to the log view
+func (m *Messenger) AddLog(msg ...interface{}) {
+	logMessage := fmt.Sprint(msg...)
 	buffer := m.getBuffer()
-	buffer.insert(buffer.End(), []byte(msg+"\n"))
+	buffer.insert(buffer.End(), []byte(logMessage+"\n"))
 	buffer.Cursor.Loc = buffer.End()
 	buffer.Cursor.Relocate()
 }

cmd/micro/micro.go

@@ -363,6 +363,7 @@ func main() {
 	L.SetGlobal("Loc", luar.New(L, func(x, y int) Loc {
 		return Loc{x, y}
 	}))
+	L.SetGlobal("WorkingDirectory", luar.New(L, os.Getwd))
 	L.SetGlobal("JoinPaths", luar.New(L, filepath.Join))
 	L.SetGlobal("DirectoryName", luar.New(L, filepath.Dir))
 	L.SetGlobal("configDir", luar.New(L, configDir))