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#!/bin/bash
VERSION='1.3.6'

# compatibility with Narada <1.2.0
[ -d ./var/patch/prev ] && mv ./var/patch/prev ./var/patch/.prev

exclude=( -x "\A./var/patch/" )
IFS=$'\n'
exclude+=( $(
    (find ./config/ -type f; cd ./var/patch/.prev/; find ./config/ -type f) |
    sort | uniq -c | grep '^ *2 ' | sed 's/^ *2 //' |
    perl -ne 'chomp; print "-x\n"; print "\\A\Q$_\E\\z\n"'
    ) )
IFS=$' \t\n'

powerdiff -o tmp/CURRENT -f config/patch/exclude "${exclude[@]}" \
    ./var/patch/.prev/ ./

rm                      var/patch/CURRENT.*            2>/dev/null
mv tmp/CURRENT.pre.sh   var/patch/CURRENT.10.sh        2>/dev/null
mv tmp/CURRENT.patch    var/patch/CURRENT.20.patch     2>/dev/null
mv tmp/CURRENT.tgz      var/patch/CURRENT.30.tgz       2>/dev/null
mv tmp/CURRENT.post.sh  var/patch/CURRENT.40.sh        2>/dev/null

exit
: <<'=cut'

=head1 NAME

narada-diff - prepare patch from previous version to current

=head1 VERSION

This document describes narada-diff version 1.3.6

=head1 USAGE

    narada-diff


=head1 DESCRIPTION

Script must be executed only from "project root directory".

When executed, script will delete C<var/patch/CURRENT.*> files, then
detect all changes between previous and current project versions and
generate from 0 (if there are no changes) to 4 files with these names:

    var/patch/CURRENT.10.sh
    var/patch/CURRENT.20.patch
    var/patch/CURRENT.30.tgz
    var/patch/CURRENT.40.sh

You should review these files - if something is wrong, then make changes
to project and run C<narada-diff> again until you'll be happy.

Next you can manually modify these files. If you need to add some commands
to .sh files - it's better to put them into C<var/patch/PENDING.*.sh>
instead of modifying these files. But if you need to remove some changes
from these files to avoid including them into next update - it's ok.

Now, run C<narada-release> to release next update with all changes from
current C<var/patch/CURRENT.*> and C<var/patch/PENDING.*> files.

When detecting changes it take in account C<config/patch/exclude> plus
handle files in C<config/> in special way: only added and removed files
processed, changed files ignored.


=head1 REQUIRED ARGUMENTS

None.

=head1 OPTIONS

See USAGE.

=head1 DIAGNOSTICS

None.

=head1 CONFIGURATION AND ENVIRONMENT

Use config/patch/exclude.
Use files in var/patch/.

=head1 DEPENDENCIES

None.

=head1 INCOMPATIBILITIES

None reported.

=head1 BUGS AND LIMITATIONS

No bugs have been reported.

Please report any bugs or feature requests to
C<bug-narada@rt.cpan.org>, or through the web interface at
L<http://rt.cpan.org>.


=head1 AUTHOR

Alex Efros C<< <powerman@cpan.org> >>


=head1 LICENSE AND COPYRIGHT

Copyright (c) 2008-2013 Alex Efros C<< <powerman@cpan.org> >>. All rights reserved.

This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself. See L<perlartistic>.


=head1 DISCLAIMER OF WARRANTY

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE
LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.

=cut