Avoid letting the clone command panic if no gh command (#46)

cmd/clone.go

@@ -11,7 +11,8 @@ import (
 )
 
 type cloneOption struct {
-	ws bool
+	ws       bool
+	protocol string
 }
 
 // NewCloneCommand returns the clone command
@@ -26,6 +27,7 @@ func NewCloneCommand() (cmd *cobra.Command) {
 
 	flags := cmd.Flags()
 	flags.BoolVarP(&opt.ws, "ws", "", false, "Clone the code into ~/ws/github/org/repo if it is true")
+	flags.StringVarP(&opt.protocol, "protocol", "p", "https", "The protocol, support: https, ssh, git")
 	return
 }
 
@@ -39,7 +41,7 @@ func (o *cloneOption) runE(_ *cobra.Command, args []string) (err error) {
 	if !o.ws {
 		output = nil
 	}
-	args = pkg.ParseShortCode(args, output)
+	args = pkg.ParseShortCodeWithProtocol(args, o.protocol, output)
 
 	var targetDir string
 	gitAddress := args[0]

pkg/shortcode.go

@@ -7,14 +7,26 @@ import (
 
 // ParseShortCode parses a short org/repo to a GitHub URL
 func ParseShortCode(args []string, output func(string) string) []string {
+	return ParseShortCodeWithProtocol(args, "https", output)
+}
+
+// ParseShortCodeWithProtocol parses a short org/repo with protocol
+func ParseShortCodeWithProtocol(args []string, protocol string, output func(string) string) []string {
 	if len(args) <= 0 {
 		return args
 	}
 	if output == nil {
 		output = defaultOutput
 	}
 
-	result := []string{fmt.Sprintf("https://github.com/%s", args[0])}
+	var result []string
+	switch protocol {
+	case "https":
+		result = []string{fmt.Sprintf("https://github.com/%s", args[0])}
+	case "ssh", "git":
+		result = []string{fmt.Sprintf("git@github.com:%s.git", args[0])}
+	}
+
 	if len(args) > 1 {
 		result = append(result, args[1:]...)
 	} else {