Merge pull request #58 from choria-io/57

(#57) Show command aliases in help

Author: ripienaar

Diff for: cmd.go

@@ -237,6 +237,10 @@ type CmdClause struct {
 	pluginDelegator *pluginDelegator
 }
 
+func (c *CmdClause) Aliases() []string {
+	return c.aliases
+}
+
 func newCommand(app *Application, name, help string) *CmdClause {
 	c := &CmdClause{
 		app:  app,

Diff for: templates.go

@@ -127,6 +127,9 @@ Commands:
 Flags:
 {{.Context.SelectedCommand.Flags|FlagsToTwoColumns|FormatTwoColumns}}
 {{end -}}
+{{ if len .Context.SelectedCommand.Aliases -}}
+Command Aliases: {{ .Context.SelectedCommand.Aliases | Join }}
+{{end }}
 {{end -}}
 {{if GlobalFlags .Context|VisibleFlags -}}
 {{if .HelpFlagIsSet -}}

Diff for: usage.go

@@ -136,6 +136,7 @@ func (a *Application) UsageForContext(context *ParseContext) error {
 func (a *Application) UsageForContextWithTemplate(context *ParseContext, indent int, tmpl string) error {
 	width := guessWidth(a.usageWriter)
 	funcs := template.FuncMap{
+		"Join": func(items []string) string { return strings.Join(items, ", ") },
 		"Indent": func(level int) string {
 			return strings.Repeat(" ", level*indent)
 		},