CmdTheLine aims to remove tedium from the definition of command-line
programs, producing usage and help with little effort.
The inspiration was found in Daniel Bunzli's
http://erratique.ch/software/cmdliner library.
CmdTheLine uses applicative functors to provide a declarative, compositional
mechanism for defining command-line programs by lifting regular Haskell
functions over argument parsers.
A tutorial can be found at
http://elifrey.com/2012/07/23/CmdTheLine-Tutorial/.
Suggestions, comments, and bug reports are appreciated. Please see the
bug and issue tracker at http://github.com/eli-frey/cmdtheline.
Changes since 0.1:
More type safety: Types in CmdTheLine.Arg have been made more explicit to
disalow unwanted behavior. Positional argument information and optional
argument information are distinguished from each other. As well Args must
be transformed into Term before use, as some operations make since to
perform on Arg but not on Term.
ArgVal has only one method: parser and pp have been fused into a tuple, so
that instantiation of ArgVal can be simplified for all parties.
Err is an instance of MonadIO: The Err monad now supports IO action.
File and Directory path validation: Taking advantage of new Err
capabilities, the library provides new functions for validating Strings
inside of Terms as being valid/existent file/directory paths.
Changes since 0.2.0:
Test friendly unwrap functions: To allow the testing of terms, there are
now two new functions exported with System.Console.CmdTheLine.Term, unwrap
and unwrapChoice. As well a datatype representing cause of early exit,
EvalExit is exported.
Changes since 0.2.1
