-h 或者--help 显示默认注册的选项 (#90)

clop.go

@@ -574,6 +574,14 @@ func (c *Clop) genHelpMessage(h *Help) {
 	// shortAndLong多个key指向一个option,需要used map去重
 	used := make(map[*Option]struct{}, len(c.shortAndLong))
 
+	if c.shortAndLong["h"] == nil && c.shortAndLong["help"] == nil {
+		c.shortAndLong["h"] = &Option{usage: "print the help information", showShort: []string{"h"}, showLong: []string{"help"}}
+	}
+
+	if c.shortAndLong["V"] == nil && c.shortAndLong["version"] == nil {
+		c.shortAndLong["V"] = &Option{usage: "print version information", showShort: []string{"V"}, showLong: []string{"version"}}
+	}
+
 	saveHelp := func(options map[string]*Option) {
 		for _, v := range options {
 			if _, ok := used[v]; ok {

clop_version_about_test.go

@@ -9,6 +9,21 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+// 测试显示信息, 普通命令
+func Test_Version_Show2(t *testing.T) {
+	type show struct {
+		Max int `clop:"short;long" usage:"max threads"`
+	}
+
+	var buf bytes.Buffer
+	cmd := New([]string{"-h"}).SetProcName("Test_Version_Show").SetVersion("v0.0.2").SetExit(false).SetOutput(&buf)
+	cmd.MustBind(&show{})
+
+	assert.NotEqual(t, strings.Index(buf.String(), "v0.0.2"), -1)
+	assert.NotEqual(t, strings.Index(buf.String(), "print version information"), -1)
+	assert.NotEqual(t, strings.Index(buf.String(), "print the help information"), -1)
+}
+
 // 测试显示信息
 func Test_Version_Show(t *testing.T) {
 	var buf bytes.Buffer