Golang NewFlag Examples

Example #1

File: args12.go Project: sanyaade-embedded-systems/xflag

func main() {
	flags := xflag.NewFlag()
	name := flags.String("#1", "dolly", "name of object")
	age := flags.Int("#2", 40, "age of object")
	flags.ParseArgs()
	fmt.Println("name", *name, "age", *age)
}

Example #2

File: ints.go Project: sanyaade-embedded-systems/xflag

func main() {
	flags := xflag.NewFlag()
	ints := flags.IntList("#1", "0", "set of ints")
	flags.ParseArgs()
	sum := 0
	for _, i := range *ints {
		sum += i
	}
	fmt.Println("sum", sum)
}

Example #3

File: testfin.go Project: sanyaade-embedded-systems/xflag

func main() {
	flag := xflag.NewFlag()
	f := flag.OpenFile("#1", "stdin", "input file")
	flag.ParseArgs()
	fi, e := f.Stat()
	if e != nil {
		fmt.Println("error!", e)
	} else {
		fmt.Println(fi.IsDirectory(), fi.IsRegular())
	}
	flag.Close()
}

Example #4

File: filelist.go Project: sanyaade-embedded-systems/xflag

func main() {
	flags := xflag.NewFlag()
	fl := flags.OpenFileList("#1", "", "input files")
	flags.ParseArgs()
	slice := make([]byte, 20)
	for _, fname := range *fl {
		fmt.Println("file", fname)
		f, _ := os.Open(fname)
		f.Read(slice)
		fmt.Println(string(slice))
		f.Close()
	}
}

Example #5

File: test-config1.go Project: sanyaade-embedded-systems/xflag

// it's possible to use xflags to read a simple property file
package main

import (
	"fmt"
	"github.com/stevedonovan/xflag"
	"io/ioutil"
)

var config = `
# comment line is ignored
name=bonzo dog
age=12  # age of animal
owners=Alice,John
`

var (
	flags  = xflag.NewFlag()
	name   = flags.String("name", "dolly", "name of object")
	age    = flags.Int("age", 40, "age of object")
	owners = flags.StringList("owners", "self", "owners of this animal")
)

func main() {
	tmp, _ := ioutil.TempFile("", "tmp")
	tmp.WriteString(config)
	tmp.Close()
	flags.ParseConfig(tmp.Name())
	fmt.Printf("name %q %d owners: %v\n", *name, *age, *owners)
}