:
    eval 'exec perl -S $0 ${1+"$@"}'
        if 0;

#*************************************************************************
#
#    This tool makes it easy to cleanly re-locate a
# build, eg. after you have copied or moved it to a new
# path. It tries to re-write all the hard-coded path logic
# internally.
#
#*************************************************************************
#
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
# 
# Copyright 2000, 2010 Oracle and/or its affiliates.
#
# OpenOffice.org - a multi-platform office productivity suite
#
# This file is part of OpenOffice.org.
#
# OpenOffice.org is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# only, as published by the Free Software Foundation.
#
# OpenOffice.org 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 Lesser General Public License version 3 for more details
# (a copy is included in the LICENSE file that accompanied this code).
#
# You should have received a copy of the GNU Lesser General Public License
# version 3 along with OpenOffice.org.  If not, see
# <http://www.openoffice.org/license.html>
# for a copy of the LGPLv3 License.
#
#*************************************************************************

sub sniff_set($)
{
    my $build_dir = shift;
    my ($dirhandle, $fname);

    opendir ($dirhandle, $build_dir) || die "Can't open $build_dir";
    while ($fname = readdir ($dirhandle)) {
	$fname =~ /[Ss]et.sh$/ && last;
    }
    closedir ($dirhandle);

    return $fname;
}

sub sed_file($$$)
{
    my ($old_fname, $function, $state) = @_;
    my $tmp_fname = "$old_fname.new";
    my $old_file;
    my $new_file;

    open ($old_file, $old_fname) || die "Can't open $old_fname: $!";
    open ($new_file, ">$tmp_fname") || die "Can't open $tmp_fname: $!";
    
    while (<$old_file>) {
	my $value = &$function($state, $_);
	print $new_file $value;
    }
    
    close ($new_file) || die "Failed to close $tmp_fname: $!";
    close ($old_file) || die "Failed to close $old_fname: $!";

    rename $tmp_fname, $old_fname || die "Failed to replace $old_fname: $!";
}

sub rewrite_value($$)
{
    my ($state, $value) = @_;

    $value =~ s/$state->{'old_root'}/$state->{'new_root'}/g;
    $value =~ s/$state->{'win32_old_root'}/$state->{'win32_new_root'}/g;

    return $value;
}

sub rewrite_set($$$)
{
    my $new_root = shift;
    my $old_root = shift;
    my $set = shift;
    my $tmp;
    my %state;

    print "   $set\n";

# unix style
    $state{'old_root'} = $old_root;
    $state{'new_root'} = $new_root;
# win32 style
    $tmp = $old_root;
    $tmp =~ s/\//\\\\\\\\\\\\\\\\/g;
    $state{'win32_old_root'} = $tmp;
    $tmp = $new_root;
    $tmp =~ s/\//\\\\\\\\/g;
    $state{'win32_new_root'} = $tmp;

    sed_file ("$new_root/$set", \&rewrite_value, \%state);
}

sub find_old_root($$)
{
    my $new_root = shift;
    my $set = shift;
    my $fname = "$new_root/$set";
    my $old_root;
    my $file;

    open ($file, $fname) || die "Can't open $fname: $!";
    
    while (<$file>) {
	if (/\s*([^=]+)\s*=\s*\"([^\"]+)\"/) {
	    my ($name, $value) = ($1, $2);

	    if ($name eq 'SRC_ROOT') {
		$old_root = $value;
		last;
	    }
	}
    }
    
    close ($file) || die "Failed to close $fname: $!";

    return $old_root;
}

sub rewrite_product_deps($$$)
{
    my $new_root = shift;
    my $product_path = shift;
    my $old_root = shift;

    my $path = "$new_root/$product_path/misc";
    my $misc_dir;
    opendir ($misc_dir, $path) || return;
    my $name;
    while ($name = readdir ($misc_dir)) {
# Should try re-writing these - but perhaps this would
# screw with timestamps ?
    if ($name =~ m/\.dpcc$/ || $name =~ m/\.dpslo$/ || $name =~ m/\.dpobj$/) {
		unlink ("$path/$name");
	}
    }
    closedir ($misc_dir);
}

sub rewrite_dpcc($$)
{
    my $new_root = shift;
    my $old_root = shift;

    my $top_dir;
    my $idx = 0;
    opendir ($top_dir, $new_root) || die "Can't open $new_root: $!";
    my $name;
    while ($name = readdir ($top_dir)) {
	my $sub_dir;
	opendir ($sub_dir, "$new_root/$name") || next;
	my $sub_name;
	while ($sub_name = readdir ($sub_dir)) {
	    if ($sub_name =~ /\.pro$/) {
		$idx || print "\n    ";
		if ($idx++ == 6) {
		    $idx = 0;
		}
		print "$name ";
		rewrite_product_deps ($new_root, "$name/$sub_name", $old_root);
	    }
	}
	closedir ($sub_dir);
    }
    closedir ($top_dir);
}

sub rewrite_bootstrap($$)
{
    my $new_root = shift;
    my $old_root = shift;

    print "   bootstrap\n";

    my %state;
    $state{'old_root'} = $old_root;
    $state{'new_root'} = $new_root;

    my $rewrite = sub { my $state = shift; my $value = shift;
			$value =~ s/$state->{'old_root'}/$state->{'new_root'}/g;
			return $value; };
    sed_file ("$new_root/bootstrap", $rewrite, \%state);
    `chmod +x $new_root/bootstrap`;
}

for $a (@ARGV) {
    if ($a eq '--help' || $a eq '-h') {
	print "relocate: syntax\n";
	print "  relocate /path/to/new/ooo/source_root\n";
    }
}

$OOO_BUILD = shift (@ARGV) || die "Pass path to relocated source tree";
substr ($OOO_BUILD, 0, 1) eq '/' || die "relocate requires absolute paths";

my $set;

$set = sniff_set($OOO_BUILD) || die "Can't find env. set";
$OLD_ROOT = find_old_root($OOO_BUILD, $set);

print "Relocate: $OLD_ROOT -> $OOO_BUILD\n";

print "re-writing environment:\n";

rewrite_set($OOO_BUILD, $OLD_ROOT, $set);
rewrite_bootstrap($OOO_BUILD, $OLD_ROOT);

print "re-writing dependencies:\n";

rewrite_dpcc($OOO_BUILD, $OLD_ROOT);

print "done.\n";