#!/usr/bin/perl
#
# Copyright (C) 2009 Germain Garand <germain@ebooksfrance.org>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this library; see the file COPYING.LIB.  If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.

# Run this from the svn directory containing your |tests| and |baseline| directories for testregression.
# It will output a list of all tests/baselines that have been updated on the SVN server,
# in a form suitable to be used with testregression - so you may regenerate selected tests
# using 'testregression -g'
#
# It makes it easier to maintain a private baseline.
#
# Say for instance that you have a private baseline generated with:
#   testregression -g -r baseline_priv .
#
# From time to time, people will have to add/update tests in the svn-kept baseline.
# So instead of regenerating your whole private baseline to update it, you may run:
#   testregression -g -r baseline_priv `list-updated-tests` .
# to update those tests in your own baseline ( check first that list-updated-tests does have an output a all)
#
# Of course, this will only work *before* you 'svn update'.

use strict;

my @local;
my %dist;

my $svn = `which svn`;
chomp $svn;

open S, "-|", "$svn status -u tests baseline", or die "Couldn't get status: $!.\n";

while (<S>) {
    /^([AMCDR]?)\s+(\*)?.*?(\S+)$/;
    my $loc = $1;
    my $dist = $2;
    my $fname = $3;

    if ($loc and $dist and ($loc eq "M" || $loc eq "C")) {
        push @local, $fname;
    } elsif ($dist and not -d $fname and not $fname =~ /svnignore/ ) {
        if ($fname =~ s|baseline/||) {
            $fname =~ s/-(?:dump.png|render|dom)//;
        } else {
            $fname =~ s|tests/||;
        }
        $dist{ $fname } =1 if (! -d $fname);
    }
}
close S;

if (scalar @local) {
   print STDERR "Locally changed/conflicting files found:\n",join(" ", @local), "\n";
   print STDERR "A more recent version of those files exist on the server. Please resolve.\n";
   die;
}

if (scalar keys %dist) {
    print "-t ".join(" -t ", keys %dist)."\n";
}