Command-line processing like svn and git
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README

NAME
    Getopt::Chain - Command-line processing like svn and git

VERSION
    version 0.017

DESCRIPTION
    Getopt::Chain can be used to provide svn(1)- and git(1)-style option and
    command processing. Any option specification covered by Getopt::Long is
    fair game.

    This is a new version of Getopt::Chain that uses Path::Dispatcher

    CAVEAT 1: This is pretty beta, so the sugar/interface above WILL be
    tweaked

    CAVEAT 2: Unfortunately, Getopt::Long slurps up the entire arguments
    array at once. Usually, this isn't a problem (as Getopt::Chain uses
    pass_through). However, if a subcommand has an option with the same name
    or alias as an option for a parent, then that option won't be available
    for the subcommand. For example:

        ./script --verbose --revision 36 edit --revision 48 --file xyzzy.c
        # Getopt::Chain will not associate the second --revision with "edit"

    So, for now, try to use distinct option names/aliases :)

    DEBUG: You can get some extra information about what Getopt::Chain is
    doing by setting the environment variable "GOC_TRACE" to 1

SYNPOSIS
        package My::Command;

        use Getopt::Chain::Declare;

        start [qw/ verbose|v /]; # These are "global"
                                 # my-command --verbose initialize ...

        # my-command ? initialize ... --> my-command help initialize ...
        rewrite qr/^\?(.*)/ => sub { "help ".($1||'') };

        # NOTE: Rewriting applies to the command sequence, NOT options

        # my-command about ... --> my-command help about
        rewrite [ ['about', 'copying'] ] => sub { "help $1" };

        # my-command initialize --dir=...
        on initialize => [qw/ dir|d=s /], sub {
            my $context = shift;

            my $dir = $context->option( 'dir' )

            # Do initialize stuff with $dir
        };

        # my-command help
        on help => undef, sub {
            my $context = shift;

            # Do help stuff ...
            # First argument is undef because help
            # doesn't take any options
        };

        under help => sub {

            # my-command help create
            # my-command help initialize
            on [ [ qw/create initialize/ ] ] => undef, sub {
                my $context = shift;

                # Do help for create/initialize
                # Both: "help create" and "help initialize" go here
            };

            # my-command help about
            on 'about' => undef, sub {
                my $context = shift;

                # Help for about...
            };

            # my-command help copying
            on 'copying' => undef, sub {
                my $context = shift;

                # Help for copying...
            };

            # my-command help ...
            on qr/^(\S+)$/ => undef, sub {
               my $context = shift;
               my $topic = $1;

               # Catch-all for anything not fitting into the above...

               warn "I don't know about \"$topic\"\n"
            };
        };

        # ... elsewhere ...

        My::Command->new->run( [ @arguments ] )
        My::Command->new->run # Just run with @ARGV

LEGACY
    The old-style, non Path::Dispatcher version is still available at
    Getopt::Chain::v005

SEE ALSO
    Getopt::Long

    App::Cmd

    MooseX::App::Cmd

ACKNOWLEDGEMENTS
    Sartak for Path::Dispatcher

    obra for inspiration on the CLI (via Prophet & Sd:
    <http://syncwith.us/>)

AUTHOR
    Robert Krimen <robertkrimen@gmail.com>

COPYRIGHT AND LICENSE
    This software is copyright (c) 2011 by Robert Krimen.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.