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#!/usr/bin/perl

use warnings;
use strict;

use Template;
use Getopt::Long qw(:config no_ignore_case);

my $repos;
my $template;
my $n_old_revision = 10;
my $svnlook = 'svnlook';

sub parse_revision 
{
    my ($r, $rev) = @_;
    # General Information
    my @cmd = `$svnlook --revision $r info $repos`;
    map { chomp; } @cmd;
    $$rev{rev} = $r;
    $$rev{author} =  shift @cmd;
    $$rev{date} = shift @cmd;
    shift @cmd; # log message size
    pop @cmd while (@cmd && $cmd[-1] eq ''); # remove empty lines
    $$rev{msg} = \@cmd;
    # Changed 
    open OUT, "$svnlook --revision $r changed $repos|";
    while (<OUT>)
    {
	if (/^([A-Z])\s+(.+)$/)
	{
	    push @{$$rev{add}}, $2 and next if $1 eq 'A';
	    push @{$$rev{upd}}, $2 and next if $1 eq 'U';
	    push @{$$rev{del}}, $2 and next if $1 eq 'D';
	}
    }
}

sub usage 
{
    print "Usage: $0 [ -n number of revisions to show ] -t template dir -r reposotory\n";
    exit 0;
}

sub config 
{
    my $help;
    GetOptions ("h" => \$help,
                "t=s" => \$template,
		"n=i" => \$n_old_revision,
		"r=s" => \$repos
           );
    die usage () if ((!defined $template and !defined $repos) or defined $help);
}

{
    # Collect data
    config ();
    my $cur_rev =`$svnlook youngest $repos`;
    chomp $cur_rev;
    my $last_rev = $cur_rev - $n_old_revision;
    $last_rev = 0 if ($last_rev < 0);
    my @revisions;
    for (my $i = $cur_rev; $i > $last_rev; $i --)
    {	
	my %revision;
	parse_revision ($i, \%revision);
	push @revisions, \%revision;
    }
    # Print it
    my $tt = new Template ({ INCLUDE_PATH => $template });
    $tt->process ('html.tt', { revisions => \@revisions }) 
	or die $tt->error;
}