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package installer::strip;

use installer::converter;
use installer::existence;
use installer::globals;
use installer::logger;
use installer::pathanalyzer;
use installer::systemactions;

#####################################################################
# Checking whether a file has to be stripped
#####################################################################

sub need_to_strip
{
	my ( $filename ) = @_;
	
	my $strip = 0;
	
	# Check using the "file" command

	open (FILE, "file $filename |");
	my $fileoutput = <FILE>;
	close (FILE);

	if (( $fileoutput =~ /not stripped/i ) && ( $fileoutput =~ /\bELF\b/ )) { $strip = 1; }

	return $strip		
}

#####################################################################
# Checking whether a file has to be stripped
#####################################################################

sub do_strip
{
	my ( $filename ) = @_;
	
	my $systemcall = "strip" . " " . $filename;
	
	my $returnvalue = system($systemcall);

	my $infoline = "Systemcall: $systemcall\n";
	push( @installer::globals::logfileinfo, $infoline);
		
	if ($returnvalue)
	{
		$infoline = "ERROR: Could not strip $filename!\n";
		push( @installer::globals::logfileinfo, $infoline);
	}
	else
	{
		$infoline = "SUCCESS: Stripped library $filename!\n";
		push( @installer::globals::logfileinfo, $infoline);
	}
}

#####################################################################
# Resolving all variables in the packagename.
#####################################################################

sub strip_libraries
{
	my ( $filelist, $languagestringref ) = @_;

	installer::logger::include_header_into_logfile("Stripping files:");

	my $strippeddirbase = installer::systemactions::create_directories("stripped", $languagestringref);

	if (! installer::existence::exists_in_array($strippeddirbase, \@installer::globals::removedirs))
	{
		push(@installer::globals::removedirs, $strippeddirbase);		
	}

	for ( my $i = 0; $i <= $#{$filelist}; $i++ )
	{
		my $sourcefilename = ${$filelist}[$i]->{'sourcepath'};

		if ( need_to_strip($sourcefilename) )
		{
			my $shortfilename = $sourcefilename;
			installer::pathanalyzer::make_absolute_filename_to_relative_filename(\$shortfilename);
			
			$infoline = "Strip: $shortfilename\n";
			push( @installer::globals::logfileinfo, $infoline);

			# copy file into directory for stripped libraries

			my $onelanguage = ${$filelist}[$i]->{'specificlanguage'};
	
			# files without language into directory "00"
			
			if ($onelanguage eq "") { $onelanguage = "00"; }
			
			my $strippeddir = $strippeddirbase . $installer::globals::separator . $onelanguage;
			installer::systemactions::create_directory($strippeddir);	# creating language specific subdirectories

			my $destfilename = $strippeddir . $installer::globals::separator . $shortfilename;
			installer::systemactions::copy_one_file($sourcefilename, $destfilename);

			# change sourcepath in files collector

			${$filelist}[$i]->{'sourcepath'} = $destfilename;

			# strip file
			
			do_strip($destfilename);
		}
	}
}

1;
