#!/usr/bin/perl -w
#
# Base subroutines for the Project-Builder project
#
# $Id$
#

use strict;
use lib qw (lib);
use File::Basename;
use File::Path;
use File::Temp qw /tempdir/;
use AppConfig qw(ARGCOUNT_HASH);
use Data::Dumper;

use ProjectBuilder::Changelog qw (pb_changelog);

$ENV{'PBETC'} = "$ENV{'HOME'}/.pbrc";

sub pb_env_init {

my $proj=shift;
my $ver;
my $tag;

# For the moment not dynamic
my $debug = 0;					# Debug level
my $LOG = *STDOUT;				# Where to log

#
# Check project name
# Could be with env var PBPROJ
# or option -p
# if not define take the first in conf file
#
if ((defined $ENV{'PBPROJ'}) &&
	(not (defined $proj))) {
	$proj = $ENV{'PBPROJ'};
}

#
# We get the pbrc file for that project 
# and use its content
#
my ($pbrc) = pb_conf_read("$ENV{'PBETC'}","pbrc");
print "DEBUG pbrc: ".Dumper($pbrc)."\n" if ($debug >= 1);

my %pbrc = %$pbrc;
if (not defined $proj) {
	# Take the first as the default project
	$proj = (keys %pbrc)[0];
	print $LOG "Using $proj as default project as none has been specified\n" if (($debug >= 0) and (defined $proj));
}
die "No project defined - use env var PBPROJ or -p proj" if (not (defined $proj));

#
# Set delivery directory
#
my $topdir=dirname($pbrc{$proj});
# Expand potential env variable in it
eval { $topdir =~ s/(\$ENV.+\})/$1/eeg };
chdir $topdir || die "Unable to change directory to $topdir";
$pbrc{$proj} = $topdir."/pbrc";
$ENV{'PBDESTDIR'}=$topdir."/delivery";

#
# Use project configuration file if needed
#
if (not defined $ENV{'PBROOT'}) {
	if (-f $pbrc{$proj}) {
		my ($pbroot) = pb_conf_read($pbrc{$proj},"pbroot");
		my %pbroot = %$pbroot;
		# All lines should point to the same pbroot so take the first
		$ENV{'PBROOT'} = (values %$pbroot)[0] if (defined $pbroot); 
		print $LOG "Using $ENV{'PBROOT'} as default pbroot from $pbrc{$proj}\n" if (($debug >= 0) and (defined $ENV{'PBROOT'}));
	}
	die "No pbroot defined - use env var PBROOT or -r pbroot " if (not defined $ENV{'PBROOT'});
}

#
# Check pb conf compliance
#
$ENV{'PBCONF'} = "$ENV{'PBROOT'}/pbconf";
die "Project $proj not Project-Builder compliant. Please populate $ENV{'PBCONF'}" if ( not -d "$ENV{'PBCONF'}");

my %version = ();
my %defpkgdir = ();
my %extpkgdir = ();
my %filteredfiles = ();

if (-f "$ENV{'PBCONF'}/$proj.pb") {
	# List of pkg to build by default (mandatory)
	# List of additional pkg to build when all is called (optional)
	# Valid version names (optional)
	# List of files to filter (optional)
	my ($defpkgdir, $extpkgdir, $version, $filteredfiles, $pkgv, $pkgt) = pb_conf_read("$ENV{'PBCONF'}/$proj.pb","defpkgdir","extpkgdir","version","filteredfiles","projver","projtag");
	print "DEBUG: defpkgdir: ".Dumper($defpkgdir)."\n" if ($debug >= 1);
	print "DEBUG: extpkgdir: ".Dumper($extpkgdir)."\n" if ($debug >= 1);
	print "DEBUG: version: ".Dumper($version)."\n" if ($debug >= 1);
	print "DEBUG: filteredfiles: ".Dumper($filteredfiles)."\n" if ($debug >= 1);
	die "Unable to find defpkgdir in $ENV{'PBCONF'}/$proj.pb" if (not defined $defpkgdir);
	# Global
	%defpkgdir = %$defpkgdir;
	# Global
	%extpkgdir = %$extpkgdir if (defined $extpkgdir);
	%version = %$version if (defined $version);
	# Global
	%filteredfiles = %$filteredfiles if (defined $filteredfiles);
	#
	# Get global Version/Tag
	#

	if (not defined $ENV{'PBVER'}) {
		if ((defined $pkgv) && (defined $pkgv->{$proj})) {
			$ENV{'PBVER'}=$pkgv->{$proj};
		} else {
			die "No projver found in $ENV{'PBCONF'}/$proj.pb";
		}
	}
	die "Invalid version name $ENV{'PBVER'} in $ENV{'PBCONF'}/$proj.pb" if (($ENV{'PBVER'} !~ /[0-9.]+/) && (not exists $version{$ENV{'PBVER'}}));
	
	if (not defined $ENV{'PBTAG'}) {
		if ((defined $pkgt) && (defined $pkgt->{$proj})) {
			$ENV{'PBTAG'}=$pkgt->{$proj};
		} else {
			die "No projtag found in $ENV{'PBCONF'}/$proj.pb";
		}
	}
	die "Invalid tag name $ENV{'PBTAG'} in $ENV{'PBCONF'}/$proj.pb" if ($ENV{'PBTAG'} !~ /[0-9.]+/);
} else {
	die "Unable to open $ENV{'PBCONF'}/$proj.pb";
}

#
# Set temp directory
#
if (not defined $ENV{'TMPDIR'}) {
	$ENV{'TMPDIR'}="/tmp";
}
$ENV{'PBTMP'} = tempdir( "pb.XXXXXXXXXX", DIR => $ENV{'TMPDIR'}, CLEANUP => 1 );

#
# Removes all directory existing below the delivery dir 
# as they are temp dir only
# Files stay and have to be cleaned up manually
#
if (-d $ENV{'PBDESTDIR'}) {
	opendir(DIR,$ENV{'PBDESTDIR'}) || die "Unable to open directory $ENV{'PBDESTDIR'}: $!";
	foreach my $d (readdir(DIR)) {
		next if ($d =~ /^\./);
		next if (-f "$ENV{'PBDESTDIR'}/$d");
		pb_rm_rf("$ENV{'PBDESTDIR'}/$d") if (-d "$ENV{'PBDESTDIR'}/$d");
	}
	closedir(DIR);
}
if (! -d "$ENV{'PBDESTDIR'}") {
	pb_mkdir_p($ENV{'PBDESTDIR'}) || die "Unable to recursively create $ENV{'PBDESTDIR'}";
}

#
# Set build directory
#
$ENV{'PBBUILDDIR'}=$topdir."/build";
if (! -d "$ENV{'PBBUILDDIR'}") {
	pb_mkdir_p($ENV{'PBBUILDDIR'}) || die "Unable to recursively create $ENV{'PBBUILDDIR'}";
}

umask 0022;
return($proj,$debug,$LOG,\%pbrc, \%filteredfiles, \%defpkgdir, \%extpkgdir);
}

# Internal mkdir -p function
sub pb_mkdir_p {
my @dir = @_;
my $ret = mkpath(@dir, 0, 0755);
return($ret);
}

# Internal rm -rf function
sub pb_rm_rf {
my @dir = @_;
my $ret = rmtree(@dir, 0, 0);
return($ret);
}

# Internal system function
sub pb_system {

my $cmd=shift;
my $cmt=shift || $cmd;

print "$cmt... ";
#system("$cmd 2>&1 > $ENV{'PBTMP'}/system.log");
system("$cmd");
if ($? == -1) {
	print "failed to execute ($cmd) : $!\n";
	pb_display_file("$ENV{'PBTMP'}/system.log");
} elsif ($? & 127) {
	printf "child ($cmd) died with signal %d, %s coredump\n", ($? & 127),  ($? & 128) ? 'with' : 'without';
	pb_display_file("$ENV{'PBTMP'}/system.log");
} elsif ($? == 0) {
	print "OK\n";
} else {
	printf "child ($cmd) exited with value %d\n", $? >> 8;
	pb_display_file("$ENV{'PBTMP'}/system.log");
}
}

sub pb_display_file {

my $file=shift;

return if (not -f $file);
open(FILE,"$file");
while (<FILE>) {
	print $_;
}
close(FILE);
}

# Function which returns a pointer on a table
# corresponding to a set of values queried in the conf file
# and test the returned vaue as they need to exist in that case
sub pb_conf_get {

my @param = @_;

# Everything is returned via ptr1
my @ptr1 = pb_conf_read("$ENV{'PBETC'}", @param);
my @ptr2 = pb_conf_read("$ENV{'PBCONF'}/$ENV{'PBPROJ'}.pb", @param);

my $p1;
my $p2;

foreach my $i (0..$#param) {
	die "No $param[$i] defined for $ENV{'PBPROJ'}" if ((not defined $ptr1[$i]) && (not defined $ptr2[$i]));
	# Always try to take the param from the home dir conf file in priority
	# in order to mask what could be defined under the CMS to allow for overloading
	$p1 = $ptr1[$i];
	$p2 = $ptr2[$i];
	if (not defined $p2) {
		# No ref in CMS project conf file so use the home dir one.
		$p1->{$ENV{'PBPROJ'}} = $p1->{'default'} if (not defined $p1->{$ENV{'PBPROJ'}});
	} else {
		# Ref found in CMS project conf file
		if (not defined $p1) {
			# No ref in home dir project conf file so use the CMS one.
			$p2->{$ENV{'PBPROJ'}} = $p2->{'default'} if (not defined $p2->{$ENV{'PBPROJ'}});
			$p1->{$ENV{'PBPROJ'}} = $p2->{$ENV{'PBPROJ'}};
		} else {
			# Both are defined - handling the overloading
			if (not defined $p1->{'default'}) {
				if (defined $p2->{'default'}) {
					$p1->{'default'} = $p2->{'default'};
				}
			}

			if (not defined $p1->{$ENV{'PBPROJ'}}) {
				if (defined $p2->{$ENV{'PBPROJ'}}) {
					$p1->{$ENV{'PBPROJ'}} = $p2->{$ENV{'PBPROJ'}};
				} else {
					$p1->{$ENV{'PBPROJ'}} = $p1->{'default'};
				}
			}
		}
	}
	die "No $param[$i] defined for $ENV{'PBPROJ'}" if (not defined $p1->{$ENV{'PBPROJ'}});
}
#print "DEBUG: param: ".Dumper(@ptr)."\n" if ($debug >= 1);
return(@ptr1);
}

sub pb_no_err {
}

# Function which returns a pointer on a hash
# corresponding to a declaration (arg2) in a conf file (arg1)
sub pb_conf_read {

my $conffile = shift;
my @param = @_;
my $trace;
my @ptr;

my $debug = 0;

if ($debug > 0) {
	$trace = 1;
} else {
	$trace = 0;
}


my $config = AppConfig->new({
							# Auto Create variables mentioned in Conf file
							CREATE => 1,
							DEBUG => $trace,
							ERROR => \&pb_no_err,
							GLOBAL => {
								# Each conf item is a hash
								ARGCOUNT => ARGCOUNT_HASH,
							},
						});
$config->file($conffile);
for my $param (@param) {
	push @ptr,$config->get($param);
}
print "DEBUG: params: ".Dumper(@param)." ".Dumper(@ptr)."\n" if ($debug >= 1);
return(@ptr);
}

# Setup environment for CMS system
sub pb_cms_init {

my $proj = shift || undef;
my $ret;

my ($cms) = pb_conf_get("cms");

if ($cms->{$proj} eq "svn") {
	$ENV{'PBREVISION'}=`(cd "$ENV{'PBROOT'}" ; svnversion .)`;
	chomp($ENV{'PBREVISION'});
	$ENV{'PBCMSLOG'}="svn log";
	$ENV{'PBCMSLOGFILE'}="svn.log";
} elsif ($cms->{$proj} eq "flat") {
	$ENV{'PBREVISION'}="flat";
	$ENV{'PBCMSLOG'}="/bin/true";
	$ENV{'PBCMSLOGFILE'}="flat.log";
} elsif ($cms->{$proj} eq "cvs") {
	# Way too slow
	#$ENV{'PBREVISION'}=`(cd "$ENV{'PBROOT'}" ; cvs rannotate  -f . 2>&1 | awk '{print \$1}' | grep -E '^[0-9]' | cut -d. -f2 |sort -nu | tail -1)`;
	#chomp($ENV{'PBREVISION'});
	$ENV{'PBREVISION'}="CVS";
	$ENV{'PBCMSLOG'}="cvs log";
	$ENV{'PBCMSLOGFILE'}="cvs.log";
	#
	# Export content if needed
	#
	my ($cvsroot,$cvsrsh) = pb_conf_get("cvsroot","cvsrsh");
	$ENV{'CVSROOT'} = $cvsroot->{$proj} if (defined $cvsroot->{$proj});
	$ENV{'CVSRSH'} = $cvsrsh->{$proj} if (defined $cvsrsh->{$proj});
} else {
	die "cms $cms->{$proj} unknown";
}
return($cms);
}

sub pb_cms_export {
my $cms = shift;
my $pbdate = shift || undef;
my $source = shift;
my $destdir = shift;
my $tmp;
my $tmp1;

if ($cms->{$ENV{'PBPROJ'}} eq "svn") {
	if (-d $source) {
		$tmp = $destdir;
	} else {
		$tmp = $destdir."/".basename($source);
	}
	pb_system("svn export $source $tmp","Exporting $source from SVN to $tmp");
} elsif ($cms->{$ENV{'PBPROJ'}} eq "flat") {
	if (-d $source) {
		$tmp = $destdir;
	} else {
		$tmp = $destdir."/".basename($source);
	}
	pb_system("cp -a $source $tmp","Exporting $source from DIR to $tmp");
} elsif ($cms->{$ENV{'PBPROJ'}} eq "cvs") {
	my $dir=dirname($destdir);
	my $base=basename($destdir);
	if (-d $source) {
		$tmp1 = $source;
		$tmp1 =~ s|$ENV{'PBROOT'}/||;
	} else {
		$tmp1 = dirname($source);
		$tmp1 =~ s|$ENV{'PBROOT'}/||;
		$tmp1 = $tmp1."/".basename($source);
	}
	# CVS needs a relative path !
	pb_system("cd $dir ; cvs export -D \"$pbdate\" -d $base $tmp1","Exporting $source from CVS to $destdir");
} else {
	die "cms $cms->{$ENV{'PBPROJ'}} unknown";
}
}

sub pb_cms_log {
my $cms = shift;
my $pkgdir = shift;
my $destfile = shift;

if ($cms->{$ENV{'PBPROJ'}} eq "svn") {
	pb_system("svn log -v $pkgdir > $destfile","Extracting log info from SVN");
} elsif ($cms->{$ENV{'PBPROJ'}} eq "flat") {
	# Nothing to do
} elsif ($cms->{$ENV{'PBPROJ'}} eq "cvs") {
	my $tmp=basename($pkgdir);
	# CVS needs a relative path !
	pb_system("cvs log $tmp > $destfile","Extracting log info from CVS");
} else {
	die "cms $cms->{$ENV{'PBPROJ'}} unknown";
}
}

sub pb_cms_getinfo {
my $cms = shift;
my $url = "";
my $void = "";

if ($cms->{$ENV{'PBPROJ'}} eq "svn") {
	open(PIPE,"LANGUAGE=C svn info $ENV{'PBROOT'} |") || die "Unable to get svn info from $ENV{'PBROOT'}";
	while (<PIPE>) {
		($void,$url) = split(/^URL:/) if (/^URL:/);
	}
	close(PIPE);
	chomp($url);
} elsif ($cms->{$ENV{'PBPROJ'}} eq "flat") {
} elsif ($cms->{$ENV{'PBPROJ'}} eq "cvs") {
} else {
	die "cms $cms->{$ENV{'PBPROJ'}} unknown";
}
return($url);
}

sub pb_cms_copy {
my $cms = shift;
my $oldurl = shift;
my $newurl = shift;

if ($cms->{$ENV{'PBPROJ'}} eq "svn") {
	pb_system("svn copy -m \"Creation of $newurl from $oldurl\" $oldurl $newurl","Copying $oldurl to $newurl ");
} elsif ($cms->{$ENV{'PBPROJ'}} eq "flat") {
} elsif ($cms->{$ENV{'PBPROJ'}} eq "cvs") {
} else {
	die "cms $cms->{$ENV{'PBPROJ'}} unknown";
}
}

sub pb_cms_checkout {
my $cms = shift;
my $url = shift;
my $destination = shift;

if ($cms->{$ENV{'PBPROJ'}} eq "svn") {
	pb_system("svn co $url $destination","Checking $url to $destination ");
} elsif ($cms->{$ENV{'PBPROJ'}} eq "flat") {
} elsif ($cms->{$ENV{'PBPROJ'}} eq "cvs") {
} else {
	die "cms $cms->{$ENV{'PBPROJ'}} unknown";
}
}

sub pb_cms_checkin {
my $cms = shift;
my $dir = shift;

my $ver = basename($dir);
if ($cms->{$ENV{'PBPROJ'}} eq "svn") {
	pb_system("svn ci -m \"Updated to $ver\" $dir","Checking in $dir");
	pb_system("svn up $dir","Updating $dir");
} elsif ($cms->{$ENV{'PBPROJ'}} eq "flat") {
} elsif ($cms->{$ENV{'PBPROJ'}} eq "cvs") {
} else {
	die "cms $cms->{$ENV{'PBPROJ'}} unknown";
}
}

sub pb_cms_isdiff {
my $cms = shift;

if ($cms->{$ENV{'PBPROJ'}} eq "svn") {
	open(PIPE,"svn diff $ENV{'PBROOT'} |") || die "Unable to get svn diff from $ENV{'PBROOT'}";
	my $l = 0;
	while (<PIPE>) {
		$l++;
	}
	return($l);
} elsif ($cms->{$ENV{'PBPROJ'}} eq "flat") {
} elsif ($cms->{$ENV{'PBPROJ'}} eq "cvs") {
} else {
	die "cms $cms->{$ENV{'PBPROJ'}} unknown";
}
}

# Get all filters to apply
# They're cumulative from less specific to most specific
# suffix is .pbf

sub pb_get_filters {

# For the moment not dynamic
my $debug = 0;					# Debug level
my $LOG = *STDOUT;				# Where to log

my @ffiles;
my ($ffile00, $ffile0, $ffile1, $ffile2, $ffile3);
my ($mfile00, $mfile0, $mfile1, $mfile2, $mfile3);
my $pbpkg = shift || die "No package specified";
my $dtype = shift || "";
my $dfam = shift || "";
my $ddir = shift || "";
my $dver = shift || "";
my $ptr; # returned value pointer on the hash of filters
my %ptr;

# Global filter files first, then package specificities
if (-d "$ENV{'PBCONF'}/pbfilter") {
	$mfile00 = "$ENV{'PBCONF'}/pbfilter/all.pbf" if (-f "$ENV{'PBCONF'}/pbfilter/all.pbf");
	$mfile0 = "$ENV{'PBCONF'}/pbfilter/$dtype.pbf" if (-f "$ENV{'PBCONF'}/pbfilter/$dtype.pbf");
	$mfile1 = "$ENV{'PBCONF'}/pbfilter/$dfam.pbf" if (-f "$ENV{'PBCONF'}/pbfilter/$dfam.pbf");
	$mfile2 = "$ENV{'PBCONF'}/pbfilter/$ddir.pbf" if (-f "$ENV{'PBCONF'}/pbfilter/$ddir.pbf");
	$mfile3 = "$ENV{'PBCONF'}/pbfilter/$ddir-$dver.pbf" if (-f "$ENV{'PBCONF'}/pbfilter/$ddir-$dver.pbf");

	push @ffiles,$mfile00 if (defined $mfile00);
	push @ffiles,$mfile0 if (defined $mfile0);
	push @ffiles,$mfile1 if (defined $mfile1);
	push @ffiles,$mfile2 if (defined $mfile2);
	push @ffiles,$mfile3 if (defined $mfile3);
}

if (-d "$ENV{'PBCONF'}/$pbpkg/pbfilter") {
	$ffile00 = "$ENV{'PBCONF'}/$pbpkg/pbfilter/all.pbf" if (-f "$ENV{'PBCONF'}/$pbpkg/pbfilter/all.pbf");
	$ffile0 = "$ENV{'PBCONF'}/$pbpkg/pbfilter/$dtype.pbf" if (-f "$ENV{'PBCONF'}/$pbpkg/pbfilter/$dtype.pbf");
	$ffile1 = "$ENV{'PBCONF'}/$pbpkg/pbfilter/$dfam.pbf" if (-f "$ENV{'PBCONF'}/$pbpkg/pbfilter/$dfam.pbf");
	$ffile2 = "$ENV{'PBCONF'}/$pbpkg/pbfilter/$ddir.pbf" if (-f "$ENV{'PBCONF'}/$pbpkg/pbfilter/$ddir.pbf");
	$ffile3 = "$ENV{'PBCONF'}/$pbpkg/pbfilter/$ddir-$dver.pbf" if (-f "$ENV{'PBCONF'}/$pbpkg/pbfilter/$ddir-$dver.pbf");

	push @ffiles,$ffile00 if (defined $ffile00);
	push @ffiles,$ffile0 if (defined $ffile0);
	push @ffiles,$ffile1 if (defined $ffile1);
	push @ffiles,$ffile2 if (defined $ffile2);
	push @ffiles,$ffile3 if (defined $ffile3);
}
if (@ffiles) {
	print $LOG "DEBUG ffiles: ".Dumper(\@ffiles)."\n" if ($debug >= 1);

	my $config = AppConfig->new({
		# Auto Create variables mentioned in Conf file
		CREATE => 1,
		DEBUG => 0,
		GLOBAL => {
			# Each conf item is a hash
			ARGCOUNT => AppConfig::ARGCOUNT_HASH
		}
	});

	$config->file(@ffiles);
	$ptr = $config->get("filter");
	print $LOG "DEBUG f:".Dumper($ptr)."\n" if ($debug >= 1);
} else {
	$ptr = { };
}
%ptr = %$ptr;
return(\%ptr);
}

# Function which applies filter on pb build files
sub pb_filter_file_pb {

my $f=shift;
my $ptr=shift;
my %filter=%$ptr;
my $destfile=shift;
my $dtype=shift;
my $pbsuf=shift;
my $pbpkg=shift;
my $pbver=shift;
my $pbtag=shift;
my $pbrev=shift;
my $pbdate=shift;
my $defpkgdir = shift;
my $extpkgdir = shift;
my $pbpackager = shift;

# For the moment not dynamic
my $debug = 0;					# Debug level
my $LOG = *STDOUT;				# Where to log

print $LOG "DEBUG: From $f to $destfile\n" if ($debug >= 1);
pb_mkdir_p(dirname($destfile)) if (! -d dirname($destfile));
open(DEST,"> $destfile") || die "Unable to create $destfile";
open(FILE,"$f") || die "Unable to open $f: $!";
while (<FILE>) {
	my $line = $_;
	foreach my $s (keys %filter) {
		# Process single variables
		print $LOG "DEBUG filter{$s}: $filter{$s}\n" if ($debug >= 1);
		my $tmp = $filter{$s};
		next if (not defined $tmp);
		# Expand variables if any single one found
		print $LOG "DEBUG tmp: $tmp\n" if ($debug >= 1);
		if ($tmp =~ /\$/) {
			eval { $tmp =~ s/(\$\w+)/$1/eeg };
		# special case for ChangeLog only for pb
		} elsif (($tmp =~ /^yes$/) && ($s =~ /^PBLOG$/) && ($line =~ /^PBLOG$/)) {
			$tmp = "";
			my $p = $defpkgdir->{$pbpkg};
			$p = $extpkgdir->{$pbpkg} if (not defined $p);
			pb_changelog($dtype, $pbpkg, $pbtag, $pbsuf, $p, \*DEST);
		}
		$line =~ s|$s|$tmp|;
	}
	print DEST $line;
}
close(FILE);
close(DEST);
}

# Function which applies filter on files (external call)
sub pb_filter_file {

my $f=shift;
my $ptr=shift;
my %filter=%$ptr;
my $destfile=shift;
my $pbpkg=shift;
my $pbver=shift;
my $pbtag=shift;
my $pbrev=shift;
my $pbdate=shift;
my $pbpackager=shift;

# For the moment not dynamic
my $debug = 0;					# Debug level
my $LOG = *STDOUT;				# Where to log

print $LOG "DEBUG: From $f to $destfile\n" if ($debug >= 1);
pb_mkdir_p(dirname($destfile)) if (! -d dirname($destfile));
open(DEST,"> $destfile") || die "Unable to create $destfile";
open(FILE,"$f") || die "Unable to open $f: $!";
while (<FILE>) {
	my $line = $_;
	foreach my $s (keys %filter) {
		# Process single variables
		print $LOG "DEBUG filter{$s}: $filter{$s}\n" if ($debug > 1);
		my $tmp = $filter{$s};
		next if (not defined $tmp);
		# Expand variables if any single one found
		if ($tmp =~ /\$/) {
			eval { $tmp =~ s/(\$\w+)/$1/eeg };
		}
		$line =~ s|$s|$tmp|;
	}
	print DEST $line;
}
close(FILE);
close(DEST);
}


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