cmdargs-0.10.18: Command line argument processing

System.Console.CmdArgs.Helper

Description

Module for implementing CmdArgs helpers. A CmdArgs helper is an external program, that helps a user construct the command line arguments. To use a helper set the environment variable $CMDARGS_HELPER (or $CMDARGS_HELPER_YOURPROGRAM) to one of:

• echo foo will cause foo to be used as the command arguments.
• cmdargs-browser will cause a web browser to appear to help entering the arguments. For this command to work, you will need to install the cmdargs-browser package: http://hackage.haskell.org/package/cmdargs-browser

Synopsis

# Called by the main program

Arguments

 :: String Name of the command to run, e.g. echo argument, cmdargs-browser -> Mode a Mode to run remotely -> [String] Initial set of command line flags (not supported by all helpers) -> IO (Either String [String]) Either an error message, or a list of flags to use

Run a remote command line entry.

# Called by the helper program

data Unknown #

Unknown value, representing the values stored within the Mode structure. While the values are not observable, they behave identically to the original values.