#!/usr/bin/perl
###########################################
# module-rename -- 2005, Mike Schilli <cpan@perlmeister.com>
###########################################
# PURPOSE
###########################################
use strict;
use warnings;
use Pod::Usage;
use Module::Rename;
use Log::Log4perl qw(:easy);
use Getopt::Std;
use File::Basename;

getopts("vgh", \my %o);

Log::Log4perl->easy_init({
  level  => $WARN,
  layout => "%m%n",
});

my  $VERSION = "0.01";

pod2usage({-message => basename($0) . " v$VERSION",
           -verbose => 2
          }) if $o{h};

my($old, $new, $dir) = @ARGV;

pod2usage "Missing arguments" unless defined $new;

my $ren = Module::Rename->new(
    name_old           => $old,
    name_new           => $new,
    wipe_empty_subdirs => 1,
    use_git            => $o{g},
);

$ren->find_and_rename($dir || ".");

__END__

=head1 NAME

    module-rename - Rename Perl module distributions

=head1 SYNOPSIS

    $ module-rename Old::Name New::Name Old-Name-Distro-Dir

=head1 DESCRIPTION

Have you ever created a module distribution, only to realize later that
the module hierarchary needed to be changed? All of a sudden, 
C<Cool::Frobnicator> didn't sound cool anymore, but needed to be
C<Util::Frobnicator> instead?

Going through a module's distribution, changing all package names,
variable names, and move the directories around can be a tedious task. 
C<Module::Rename> comes with a script C<module-rename> which takes care of 
all this:

    $ ls
    Cool-Frobnicator-0.01/

    $ module-rename Cool::Frobnicator Util::Frobnicator Cool-Frobnicator-0.01
    Cool-Frobnicator-0.01/lib/Cool is empty and can go away.

Done. The directory hierarchy has changed:

    $ ls -R
    Util-Frobnicator-0.01/
    ...
    Util-Frobnicator-0.01/lib/Util/Frobnicator.pm

... and so has the content of all files:

    $ grep "package" Util-Frobnicator-0.01/lib/Util/Frobnicator.pm
    package Util::Frobnicator;

=head2 Things to Keep in Mind

=over 4

=item *

C<module-rename> will rename files and replace their content, so make
sure that you have a backup copy in case something goes horribly wrong.

=item *

After changing the module hierarchy, some directories might be empty,
like the C<lib/Cool> directory above. In this case, a warning will be issued:

    Cool-Frobnicator-0.01/lib/Cool is empty and can go away.

and the 'empty' directory gets deleted (even if a CVS subdirectory is in 
there).

=back

=head1 OPTIONS

=over 8

=item B<-v>

Verbose mode.

=item B<-h>

Show the script's version and manual page.

=item B<-g>

Move files using "git mv" instead of "mv".

=back

=head1 LEGALESE

Copyright 2005 by Mike Schilli, all rights reserved.
This program is free software, you can redistribute it and/or
modify it under the same terms as Perl itself.

=head1 AUTHOR

2005, Mike Schilli <cpan@perlmeister.com>