fix readline support: window resizing

goreadline/goreadline.go

@@ -10,7 +10,32 @@ package goreadline
 #cgo LDFLAGS: -lreadline
 */
 import "C"
-import "unsafe"
+import (
+	"os"
+	"os/signal"
+	"syscall"
+	"unsafe"
+)
+
+func init() {
+	C.rl_catch_sigwinch = 0
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGWINCH)
+	go func() {
+		for sig := range c {
+			switch sig {
+			case syscall.SIGWINCH:
+				Resize()
+			default:
+
+			}
+		}
+	}()
+}
+
+func Resize() {
+	C.rl_resize_terminal()
+}
 
 func ReadLine(prompt *string) *string {
 	var cPrompt *C.char