Добавлена обработка аргументов командной строки типа time.Duration

cli.go

@@ -21,6 +21,7 @@ import (
 	"io"
 	"reflect"
 	"strconv"
+	"time"
 	"unsafe"
 )
 
@@ -247,6 +248,15 @@ func (c *Command) addFlag(value reflect.Value, field reflect.StructField) error
 
 	usage, _ := field.Tag.Lookup("usage")
 
+	if value.Type().PkgPath() == "time" && value.Type().Name() == "Duration" {
+		c.FlagSet.DurationVar(
+			(*time.Duration)(unsafe.Pointer(value.UnsafeAddr())),
+			name, time.Duration(0), usage,
+		)
+
+		return nil
+	}
+
 	kind := value.Kind()
 	switch kind {
 	case reflect.Bool:

cli_test.go

@@ -20,6 +20,7 @@ import (
 	"os"
 	"strconv"
 	"testing"
+	"time"
 
 	"git.mousesoft.ru/ms/config/test"
 	"github.com/stretchr/testify/assert"
@@ -264,3 +265,16 @@ func TestCommandWithSlices(t *testing.T) {
 	assert.Equal(200, conf.Values[1])
 	assert.Equal(300, conf.Values[2])
 }
+
+func TestDuration(t *testing.T) {
+	assert := assert.New(t)
+	var conf struct {
+		interval time.Duration `cli:"interval" usage:"interval"`
+	}
+
+	cmd := NewCLI("Config")
+	assert.NoError(cmd.Init(&conf), "init config command")
+
+	args := []string{"--interval", "5s"}
+	assert.NoError(cmd.Parse(args))
+}