Reset Raw mode before start command running (#158)

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>

bapps/go_prompt.go

@@ -63,6 +63,7 @@ func NewPromptApp(config *configs.Config, opts ...AppOption) BApp {
 				pa.sugguestHistory = !pa.sugguestHistory
 			},
 		}),
+		HandleFD,
 	)
 	pa.prompt = p
 	return pa
@@ -128,6 +129,7 @@ func (a *PromptApp) promptExecute(in string) {
 			}()
 		}
 	} else {
+		os.Stdout = stdout
 		close(pagerSig)
 	}
 	a.currentState, _ = a.currentState.Process(in)

bapps/go_prompt_parser.go

@@ -0,0 +1,46 @@
+package bapps
+
+import (
+	"os"
+	"os/exec"
+	"reflect"
+	"unsafe"
+
+	"github.com/c-bata/go-prompt"
+)
+
+// bInputParser wraps prompt.PosixParser to change TearDown behavior.
+type bInputParser struct {
+	*prompt.PosixParser
+}
+
+// TearDown should be called after stopping input
+func (t *bInputParser) TearDown() error {
+	t.PosixParser.TearDown()
+	rawModeOff := exec.Command("/bin/stty", "-raw", "echo")
+	rawModeOff.Stdin = os.Stdin
+	_ = rawModeOff.Run()
+	rawModeOff.Wait()
+	return nil
+}
+
+func NewInputParser(parser *prompt.PosixParser) *bInputParser {
+	p := &bInputParser{
+		PosixParser: prompt.NewStandardInputParser(),
+	}
+	return p
+}
+
+func HandleFD(p *prompt.Prompt) error {
+	in, ok := GetUnexportedField(reflect.ValueOf(p).Elem().FieldByName("in")).(*prompt.PosixParser)
+	if !ok {
+		// failed to reflect
+		return nil
+	}
+
+	return prompt.OptionParser(NewInputParser(in))(p)
+}
+
+func GetUnexportedField(field reflect.Value) interface{} {
+	return reflect.NewAt(field.Type(), unsafe.Pointer(field.UnsafeAddr())).Elem().Interface()
+}