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The latest version of options is 1.2.1.2-2.

options

Version 0.1.1 revision 1 uploaded by HerbertValerioRiedel.

Package meta

Synopsis
Parsing command-line options
Description

The options package lets library and application developers easily work with command-line options.

The following example is a full program that can accept two options, --message and --quiet:

{-# LANGUAGE TemplateHaskell #-}

import Options

defineOptions "MainOptions" $ do
    stringOption "optMessage" "message" "Hello world!"
        "A message to show the user."
    boolOption "optQuiet" "quiet" False
        "Whether to be quiet."
 
main :: IO ()
main = runCommand $ \opts args -> do
    if optQuiet opts
        then return ()
        else putStrLn (optMessage opts)

$ ./hello
Hello world!
$ ./hello --message='ciao mondo'
ciao mondo
$ ./hello --quiet
$

In addition, this library will automatically create documentation options such as --help and --help-all:

$ ./hello --help
Help Options:
  -h, --help                  Show option summary.
  --help-all                  Show all help options.

Application Options:
  --message                   A message to show the user.
  --quiet                     Whether to be quiet.
Author
John Millikin <jmillikin@gmail.com>
Bug reports
mailto:jmillikin@gmail.com
Category
Console
Copyright
n/a
Homepage
https://john-millikin.com/software/haskell-options/
Maintainer
John Millikin <jmillikin@gmail.com>
Package URL
n/a
Stability
experimental

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