Merge pull request #3 from yingzhuo/master

add see also for sub command

command.go

@@ -17,6 +17,8 @@ type Command struct {
 	Description string
 	// Examples of the program
 	Examples string
+	// SeeAlso of the program
+	SeeAlso string
 
 	// List of flags to parse
 	Flags []*Flag

help.go

@@ -44,7 +44,7 @@ COMMANDS:
 EXAMPLES:
 {{- range .ExampleLines}}
    {{.}}
-{{- end}}{{end}}{{if .SeeAlsoLines }}
+{{- end}}{{end}}{{if .SeeAlsoLines}}
 
 SEE ALSO:
 {{- range .SeeAlsoLines}}
@@ -94,6 +94,7 @@ func newCommandHelpContext(name string, cmd *Command, app *App) *HelpContext {
 		UsageText:   cmd.UsageText,
 		Description: cmd.Description,
 		Examples:    cmd.Examples,
+		SeeAlso:     cmd.SeeAlso,
 		Flags:       cmd.Flags,
 		Commands:    cmd.Commands,
 	}
@@ -180,6 +181,7 @@ func (c *HelpContext) ExampleLines() []string {
 	return examples
 }
 
+// SeeAlsoLines splits line for see also
 func (c *HelpContext) SeeAlsoLines() []string {
 	c.SeeAlso = strings.TrimSpace(c.SeeAlso)
 	if len(c.SeeAlso) == 0 {

help_test.go

@@ -53,6 +53,7 @@ func TestHelpShowHelp(t *testing.T) {
 					IsBool: true,
 				},
 			},
+			SeeAlso: "https://github.com/subchen/go-cli#build\nhttps://github.com/subchen/go-cli#build2",
 		},
 		{
 			Name:  "release",