#!/usr/bin/perl
#  
#  Copyright (c) 2002 Steve Slaven, All Rights Reserved.
#  
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of
#  the License, or (at your option) any later version.
#  
#  This program 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 General Public License for more details.
#  
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
#  MA 02111-1307 USA
#  

use Getopt::Std;

getopts( 'hfamM', \%o );

( $indir, $outdir ) = @ARGV;

die( qq{
recdiff - Author Steve Slaven

usage: $0 [-hafmM] INDIR OUTDIR

	-h	This help
	-m	Don't list missing files
	-M	List only missing files
	-f	Form feed after every file diff
	-a	List all files, even if they match

Compares files in INDIR to OUTDIR

} ) if( ! $outdir || $o{ h } );

$indir =~ s#/$##;
$outdir =~ s#/$##;

recdiff( $indir );

sub recdiff
{
	my $dir = shift;
	my( $this, $fullpath, $otherpath );
	local *DIR;

	opendir( DIR, $dir ) || die( "Couldn't open: $dir: $!" );
	
	while( $this = readdir( DIR ) )
	{
		if( ( $this ne "." ) &&
			( $this ne ".." ) )
		{
			$fullpath = "$dir/$this";
			if( -d $fullpath )
			{
				recdiff( $fullpath );
			}else
			{
				$otherpath = $fullpath;
				$otherpath =~ s/^$indir//;
				$otherpath = "$outdir$otherpath";

				$tout = '';
				$output = "";

				$tout .= "!" x 70 . "\n";
				$tout .= "$fullpath ** $otherpath " . "*" x 20 . "\n";
				$tout .= "!" x 70 . "\n";
				if( -f $otherpath )
				{
					$output = `diff -c $fullpath $otherpath` unless $o{ M };
				}else
				{
					$output = "$otherpath DOES NOT EXIST\n" unless $o{ m };
				}

				if( $output || $o{ a } )
				{
					print $tout, $output;
					print "\f" if $o{ f };
				}
			}
		}
	}
	
	closedir( DIR );
}