#!/usr/bin/perl
#
# instgame: xsystem3.5 data install script
#
# Author: Hiroshi Naraki<naraki@debian.or.jp>
#
# $Id: instgame,v 1.5 1999/05/18 21:52:02 chikama Exp $
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.

# default value
$cdrom_dir = "/cdrom";
$dest_base_dir = "~/game";

# get program name
($program) = ($0 =~ m%([^/]+)$%);

# get home directory
$home = $ENV{'HOME'};

# show usage and exit
sub usage {
    print "Usage: $program [options] <target>.inf \n";
    print "  -c directory    cdrom directory.(default: /cdrom) \n"; 
    print "  -d directory    destination game directory.(default: ~/game/<target>)\n"; 
    print "  -g file         game resource file name.(default: ~/game/<target>.gr)\n"; 
    print "  -k tag          keep the tagged file from copying.\n"; 
}

;# parsing options
while (@ARGV) {
    $_ = shift;
    s/^-// || do { $target = $_; last };
    $_ eq 'c' && @ARGV && do { $cdrom_dir = shift; next }; # install from
    $_ eq 'd' && @ARGV && do { $dest_base_dir = shift; next }; # install to
    $_ eq 'g' && @ARGV && do { $grfile = shift; next }; # gr-file to
    $_ eq 'k' && @ARGV && do { @keep_list = (@keep_list, shift); next }; # keep tag
    $_ eq 'v' && @ARGV && do { $debug = 1; next }; # debug
    &usage;
    exit;
}

# nothing target
if (! -f $target ) { 
	&usage;
	exit;
}
# decide game resource file name 
$base = $target; 
$base =~ s%.*/%%;
$base =~ s/\.inf//;
$dest_dir = $dest_base_dir."/".$base;
$grfile = $dest_base_dir."/".$base.".gr";

# expand directory name
$dest_dir =~ s/~/$home/;
$grfile   =~ s/~/$home/;

# print variables if debug
if ($debug) {
	print "cdrom_dir:$cdrom_dir\n";
	print "dest_dir:$dest_dir\n";
	print "grfile  :$grfile\n";
}

-d $cdrom_dir || die "$!:$cdrom_dir\n";

&make_dir($dest_dir);

open( DAT, $target) || die "Can't open $target:$!\n";

open( FILE, "> $grfile" )     || die "Can't create file $grfile:$!\n";
print FILE "# System 3.5 GameResource File: [$target]\n";

while( $line = <DAT>) {
	$line =~ s/\#.*|\s//g; 
	$line eq /^$/ && do { next };
	@data = split(/,/,$line);
	$tag  = $data[0];
	$from = $data[1];
	$to   = $data[2];

	if( $to eq '' ) {
		&view_action("Ignore ", $tag, $from, $to);
		next;
	}
	$to = $dest_dir."/".$to;
	if( $tag eq '' ) {
		$keep = 0;
	} else {
		$keep = grep(/$tag*/, @keep_list );
	}
	if( $keep ) {
		$from = $cdrom_dir."/".$from ;
		&view_action("Linking", $tag, $from, $to);
#		symlink($from, $to) if !$debug;
		system("ln -s $from $to") if !$debug;
	} elsif( $from eq '' ) { 
#		&view_action("Create ", $tag, $from, $to);
#		system("touch $to") if !$debug;
		&view_action("Skip   ", $tag, $from, $to);
	} else {
		$from = $cdrom_dir."/".$from ;
		foreach ( <${from}>) {
			&view_action("Copying", $tag, $from, $to);
			system("cp $from $to") if !$debug;
		}
	}

	# Create game resource file
	if( $tag ne '' ) { 
		print "writing: $tag $to\n" if $debug;
		print FILE "$tag $to\n";
	}
}
close(FILE);
close(DAT);
exit;

sub view_action {
	local($action, $tag, $from, $to ) = @_;

	print "$action $tag: $from -> $to\n";
}

# mkdir destination directories.
sub make_dir {
	local($target ) = @_;

	@dest = split(/\//,$target);
	foreach $dir ( @dest ) {
        	$work .= $dir.'/';
        	print "checking $work\n" if $debug;
        	if( !-d $work ) {
        		print "mkdir $work\n" if $debug;
			mkdir( $work,0777) || die "Can't mkdir $work:$!\n";
		}
	}
}