Fix:(issue_1455) Allow bool flags from input altsrc

altsrc/flag.go

@@ -124,13 +124,14 @@ func (f *BoolFlag) ApplyInputSourceValue(cCtx *cli.Context, isc InputSourceConte
 	if f.set != nil && !cCtx.IsSet(f.Name) && !isEnvVarSet(f.EnvVars) && isc.isSet(f.BoolFlag.Name) {
 		value, err := isc.Bool(f.BoolFlag.Name)
 		if err != nil {
+			fmt.Println(err)
 			return err
 		}
-		if value {
-			for _, name := range f.Names() {
-				_ = f.set.Set(name, strconv.FormatBool(value))
-			}
+		for _, name := range f.Names() {
+			_ = f.set.Set(name, strconv.FormatBool(value))
 		}
+	} else {
+		fmt.Println("not fill")
 	}
 	return nil
 }

altsrc/json_command_test.go

@@ -11,7 +11,7 @@ import (
 
 const (
 	fileName   = "current.json"
-	simpleJSON = `{"test": 15}`
+	simpleJSON = `{"test": 15, "testb": false}`
 	nestedJSON = `{"top": {"test": 15}}`
 )
 
@@ -34,11 +34,16 @@ func TestCommandJSONFileTest(t *testing.T) {
 		Action: func(c *cli.Context) error {
 			val := c.Int("test")
 			expect(t, val, 15)
+
+			valb := c.Bool("testb")
+			expect(t, valb, false)
 			return nil
 		},
 		Flags: []cli.Flag{
 			NewIntFlag(&cli.IntFlag{Name: "test"}),
-			&cli.StringFlag{Name: "load"}},
+			&cli.StringFlag{Name: "load"},
+			NewBoolFlag(&cli.BoolFlag{Name: "testb", Value: true}),
+		},
 	}
 	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
 	err := command.Run(c)