cmd/help.go

package cmd

import (
	"fmt"

	"go.fifitido.net/cmd/opts"
)

func (c *Command) ShowHelp() {
	cmdPath := c.CommandPath()

	fmt.Println(c.longDescription)
	fmt.Println()
	fmt.Println("Usage: ")
	fmt.Printf("  %s ", cmdPath)

	if len(c.subcommands) > 0 {
		if c.CanRun() {
			fmt.Print("[command] ")
		} else {
			fmt.Print("<command> ")
		}
	}

	fmt.Println("[options]")

	if len(c.subcommands) > 0 {
		fmt.Println()

		if c.isRoot {
			fmt.Println("Available commands:")
		} else {
			fmt.Println("Available subcommands:")
		}

		for _, s := range c.subcommands {
			fmt.Println("  " + s.name + "    " + s.shortDescription)
		}
	}

	fmt.Println()
	fmt.Println("Available options:")

	paddedWidth := c.opts.MaxWidth()
	for _, f := range c.opts {
		fmt.Println("  " + opts.HelpLine(f, paddedWidth))
	}

	globalOpts := opts.Globals()
	if len(globalOpts) > 0 {
		paddedWidth = globalOpts.MaxWidth()
		fmt.Println()
		fmt.Println("Global options:")
		for _, f := range globalOpts {
			fmt.Println("  " + opts.HelpLine(f, paddedWidth))
		}
	}

	if len(c.subcommands) > 0 {
		fmt.Println()
		fmt.Printf("Run '%s <command> --help' for more information about a command.\n", c.Root().CommandPath())
	}
}