Function cusHelpPrinter

cmd/usage.go:376–432

(w io.Writer, tmpl string, data interface{})

}

func cusHelpPrinter(w io.Writer, tmpl string, data interface{}) {
	if tmpl == AppHelpTemplate {
		cliApp := data.(*cli.App)
		cliApp.Commands = formatCommand(cliApp.Commands)
		cliApp.Flags = formatFlags(cliApp.Flags)
		categorized := make(map[string][]cli.Flag)
		for _, flag := range data.(*cli.App).Flags {
			_, ok := categorized[flag.String()]
			if !ok {
				gName := flagCategory(flag)
				categorized[gName] = append(categorized[gName], flag)
			}
		}
		sorted := make([]flagGroup, 0, len(categorized))
		for cat, flgs := range categorized {
			sorted = append(sorted, flagGroup{cat, flgs})
		}
		sort.Sort(byCategory(sorted))
		cusData := &cusHelpData{
			App:        cliApp,
			FlagGroups: sorted,
		}
		data = cusData
	} else if tmpl == SubcommandHelpTemplate {
		cliApp := data.(*cli.App)
		cliApp.Commands = formatCommand(cliApp.Commands)
		data = cliApp
	} else if tmpl == CommandHelpTemplate {
		cliCmd := data.(cli.Command)
		cliCmd.Flags = formatFlags(cliCmd.Flags)
		categorized := make(map[string][]cli.Flag)
		for _, flag := range cliCmd.Flags {
			_, ok := categorized[flag.String()]
			if !ok {
				categorized[flagCategory(flag)] = append(categorized[flagCategory(flag)], flag)
			}
		}
		sorted := make([]flagGroup, 0, len(categorized))
		for cat, flgs := range categorized {
			sorted = append(sorted, flagGroup{cat, flgs})
		}
		sort.Sort(byCategory(sorted))
		data = map[string]interface{}{
			"cmd":              cliCmd,
			"categorizedFlags": sorted,
		}
	}

	funcMap := template.FuncMap{"join": strings.Join}
	t := template.Must(template.New("help").Funcs(funcMap).Parse(tmpl))
	err := t.Execute(w, data)
	if err != nil {
		// If the writer is closed, t.Execute will fail, and there's nothing we can do to recover.
		PrintErrorMsg("CLI TEMPLATE ERROR: %#v\n", err)
		return
	}
}