Given a help text and a list of option descriptions, generate a Mode.
Modulecmdargs-0.10.22Haskell2010
System.Console.CmdArgs.GetOpt
This provides a compatiblity wrapper to the System.Console.GetOpt module in base.
That module is essentially a Haskell port of the GNU getopt library.
Changes: The changes from GetOpt are listed in the documentation for each function.
- 3 types
- 4 values
- Packagecmdargs-0.10.22
- Exports7
- LanguageHaskell2010
- LicenceBSD-3-Clause
- SourceGetOpt.hs
Process the command-line, and return the list of values that matched (and those that didn't). The arguments are:
The order requirements (see ArgOrder)
The option descriptions (see OptDescr)
The actual command line arguments (presumably got from getArgs).
getOpt returns a triple consisting of the option arguments, a list of non-options, and a list of error messages.
Changes: The list of errors will contain at most one entry, and if an error is present then the other two lists will be empty.
Changes: This is exactly the same as getOpt, but the 3rd element of the tuple (second last) will be an empty list.
Return a string describing the usage of a command, derived from the header (first argument) and the options described by the second argument.
What to do with options following non-options.
Changes: Only Permute is allowed, both RequireOrder and ReturnInOrder
have been removed.
Describes whether an option takes an argument or not, and if so
how the argument is injected into a value of type a.