taybart / args Goto Github PK

package main

import (
  "fmt"
  "os"

  "github.com/taybart/args"
)

var (
  badGlobal = 5
)

var (
  app = args.App{
    Name:    "My App",
    Version: "v0.0.1",
    Args: map[string]*args.Arg{
      "port": {
        Short:   "p",
        Long:    "port",
        Help:    "Port to listen on",
        Default: 8080,
        // Runs before arg is parsed
        Before: func(a Arg) {
          fmt.Println(a.ShortFlag())
        },
        // Runs after arg is parsed
        After: func(a Arg) {
          fmt.Println(a.String())
          badGlobal = a.ToInt()
        },
      },
    },
  }
)

func main() {
  if err := run(); err != nil {
    fmt.Println(err)
    os.Exit(1)
  }
}

func run() error {
  // ./app -p 8080
  _ = app.Parse()
  /* output:
  -> "p" 
  -> 8080
  */
}