https://github.com/orisano/subflag

subflag is subcommand library for flag package
https://github.com/orisano/subflag

Last synced: 24 days ago
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subflag is subcommand library for flag package

• Host: GitHub
• URL: https://github.com/orisano/subflag
• Owner: orisano
• License: mit
• Created: 2018-09-13T15:02:17.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2022-01-08T20:04:07.000Z (almost 3 years ago)
• Last Synced: 2024-10-04T17:51:13.071Z (about 1 month ago)
• Language: Go
• Homepage:
• Size: 12.7 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# subflag

subflag is a subcommand library for `flag` package.

## Installation

```bash

go get github.com/orisano/subflag

```

## How to use

```go

package main

import (

    "flag"

    "fmt"

    "log"

    "os"

    

    "github.com/orisano/subflag"

)

func main() {

    if err := subflag.SubCommand(os.Args[1:], []subflag.Command{&EchoCommand{}}); err != nil {

        log.Fatal(err)

    }

}

type EchoCommand struct {

    text string

}

func (c *EchoCommand) FlagSet() *flag.FlagSet {

    flagSet := flag.NewFlagSet("echo", flag.ExitOnError)

    flagSet.StringVar(&c.text, "t", c.text, "echo text (required)")

    return flagSet

}

func (c *EchoCommand) Run(args []string) error {

    if len(c.text) == 0 {

        return flag.ErrHelp

    }

    fmt.Println(c.text)

    return nil

}

```

## Author

Nao Yonashiro (@orisano)

## License

MIT