Исправлен метод захвата аргументов CLI.

cli.go

@@ -228,10 +228,11 @@ func (c *Command) Capture(args []string) []string {
 		}
 
 		name := strings.TrimPrefix(strings.TrimPrefix(arg, "-"), "-")
+		parts := strings.Split(name, "=")
 
-		if c.FlagSet.Lookup(name) != nil {
+		if c.FlagSet.Lookup(parts[0]) != nil {
 			c.Args = append(c.Args, arg)
-			expectValue = true
+			expectValue = len(parts) == 1
 		} else {
 			result = append(result, arg)
 		}

cli_test.go

@@ -280,4 +280,22 @@ func TestDuration(t *testing.T) {
 	assert.ElementsMatch([]string{"-v", "help"}, cmd.Capture(args))
 	assert.ElementsMatch([]string{"--interval", "5s"}, cmd.Args)
 	assert.NoError(cmd.Parse(cmd.Args))
+	assert.Equal(time.Second*5, conf.interval)
+}
+
+func TestDurationWithEqual(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{"-v", "--interval=5s", "help"}
+
+	assert.ElementsMatch([]string{"-v", "help"}, cmd.Capture(args))
+	assert.ElementsMatch([]string{"--interval=5s"}, cmd.Args)
+	assert.NoError(cmd.Parse(cmd.Args))
+	assert.Equal(time.Second*5, conf.interval)
 }