github.com/pnelson/cli-reflection

cli

Note: I don't really like this structure any more. I've opted for a more simple, reflection-free structure. See https://github.com/pnelson/cli and consider this package deprecated.

Package cli provides structure for command line applications with sub-commands.

This package uses a touch of reflection magic to dispatch to a method with named arguments. Commands help and version are implemented by default. The usage information is pretty printed in an opinionated format.

The most basic cli application is boring:

app := cli.New("myapp", "0.0.1") app.Run()

Build and run your application:

$ ./myapp Usage: myapp [options] [] help Output this usage information. version Output the application version

Add commands:

type add struct { showExtra *bool example *string number *int }

func (c *add) Flags(flags *flag.FlagSet) { c.showExtra = flags.Bool("show-extra", false, "Print extra arguments.") c.example = flags.String("example", "", "An example string option.") c.number = flags.Int("number", 0, "An example int option.") }

func (c *add) Run(key, username string, extra []string) { fmt.Printf("%s => %s\n", key, username) if *c.showExtra { fmt.Printf(" %v\n", extra) } }

func (c *add) String() string { return "Add record key with username." }

func main() { app := cli.New("myapp", "0.0.1") app.Rule(&add{}, "add", " []") app.Run() }

Try building and running your application again:

$ ./myapp Usage: myapp [options] [] help Output this usage information. version Output the application version. add [options] [] Add record key with username. -example= An example string option. -number= An example int option. -show-extra Print extra arguments.

Copyright (c) 2014 by Philip Nelson. See LICENSE for details.