#!/usr/bin/perl

# Copyright (c) 2007-2008, 2012 Kari Hurtta
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
if ($#ARGV != 0) {
    print STDERR "Usage:  $0 packager\n"; exit 1;
}

$packager   = $ARGV[0];

use POSIX;

$mydir = POSIX::getcwd();
$source_tar = "elm-2.4ME+126.tar.gz";
$decomp     = "z";
$basename   = "elm-2.4ME+126-1";
$package    = "elm";
$version    = "2.4ME+126-1";
$prefix     = "/usr/local";
$remove     = 1;
@patch        = ();
@patch_decomp = ();

print "Package: $package\n";
print "Version: $version\n";
print "Source:  $source_tar\n";

$docdir = "$prefix/doc/$basename";

die "$0: No file $source_tar " if (!-f $source_tar);

for (my $i = 0; $i <= $#patch; $i++) {
    die "$0: No file $patch[$i] " if (!-f $patch[$i]); 
}


$source_tar = "$mydir/$source_tar" if $source_tar !~ /^\//;

for (my $i = 0; $i <= $#patch; $i++) {
    $patch[$i] = "$mydir/$patch[$i]" if $patch[$i] !~ /^\//;
}



@remove = ();




sub load_vars ($) {
    my ($file) = @_;
    
    my %my_vars = ();
    
    open(CONFIGSH,"<$file") || die "$0: Failed to open $file with error \"$!\" ";
    while(<CONFIGSH>) {
    
	next if /^\#/;

	s/^([^\"\']*)\#/$1/;

	next if /^\s*$/;
    
	while (/^[^\']*\'[^\']*$/s ||
	       /^[^\"]*\"[^\"]*$/s) {
	    
	    my $a = <CONFIGSH>;
	    break if !defined $a;
	    $_ .= $a;
	}
	
	s/\#[^\"\']*$//s;
	s/\s+$//s;
	
	if (/^([^=]+)=\"([^\"]*)\"$/s) {
	    $my_vars{$1}=$2;
	} elsif (/^([^=]+)=\'([^\']*)\'$/s) {
	    $my_vars{$1}=$2;
	} elsif (/^([^=]+)=([^\'\"]*)$/s) {
	    $my_vars{$1}=$2;
	} else {
	    warn "$0: Failed to parse <<$_>> on $file:$. ";
	}
    }
    close(CONFIGSH);

    return %my_vars;
}

my $lsb   = '/etc/lsb-release';
my $debver = '/etc/debian_version';

$extra='';
if (-f $lsb) {
    %lsb_vars = load_vars($lsb);

    if (defined $lsb_vars{'DISTRIB_ID'} &&
	defined $lsb_vars{'DISTRIB_RELEASE'}) {

	$extra = ".$lsb_vars{'DISTRIB_ID'}$lsb_vars{'DISTRIB_RELEASE'}";
	$version .= $extra;

	print "Version: $version\n";
    }

} elsif (open(VER,"<$debver")) {

    # Default to debian if /etc/lsb-release do not exist

    my $ver1 = <VER>;
    chomp $ver1;
    close(VER);

    if ($ver1 =~ /^\d+(\.\d+)+$/) {

	$extra = ".Debian$ver1";
	$version .= $extra;

	print "Version: $version\n";
    }
}


$arch=`dpkg --print-architecture`;
chomp $arch;
print "Arch:    $arch\n";



$source_dir = "$mydir/$basename$extra.$arch.source";
$object_dir = '';

if (mkdir $source_dir) {
    print STDERR "$0: Directory $source_dir created.\n";
    push @remove, $source_dir;
}

$work_dir = "$mydir/$basename$extra.$arch.work";
if (mkdir $work_dir) {
    print STDERR "$0: Directory $work_dir created.\n";
    push @remove, $work_dir;
}

$control_dir = "$mydir/$basename$extra.$arch.control";
if (mkdir $control_dir) {
    print STDERR "$0: Directory $control_dir created.\n";
    push @remove, $control_dir;
}

$build_dir = "$mydir/$basename$extra.$arch.build";
if (mkdir $build_dir) {
    print STDERR "$0: Directory $build_dir created.\n";
    push @remove, $build_dir;
}



# ---------------------------------------------------------------------------

sub run_on_children (&) {
    my ($code) = @_;

    my $pid = fork();
    if (0 == $pid) {
	my $val = &$code;

	exit $val;
    }
    
    die "$0: fork failed with error \"$!\" " if (!defined $pid);

    my $ret = waitpid($pid,0);

    die "$0: waitpid failed " if ($ret != $pid);

    die "$0: child died with signal " if ($? & 127);

    return $? >> 8;
}

sub cd_system ($@) {
    my ($dir,@command) = @_;

    my $ret = run_on_children { 

	chdir $dir || die "$0: cd failed with error \"$!\" ";
	
	exec @command;

	die "$0: $command[0] failed  with error \"$!\" ";
	
    };

    return $ret;
} 

sub cd_system_fail ($@) {
    my ($dir,@command) = @_;

    my $ret = cd_system $dir,@command;

    if ($ret != 0) {
	warn "$0: Failed to run $command[0] ";
	exit $ret;
    }
}

sub write_config ($$) {
    my ($file,$content) = @_;

    open(CONFIG,">$file") || die "$0: Failed to create $file with error \"$!\" ";
    print CONFIG $content;

    close(CONFIG)         || die "$0: Failed to write $file with error \"$!\" ";
}


$pid = open (FILELIST,"-|");

die "$0: fork failed with error \"$!\" " if (!defined $pid);

if (0 == $pid) {

    exec 'tar', "t${decomp}f", $source_tar;
    die "$0: tar failed  with error \"$!\" ";
}

@filelist = <FILELIST>;

close FILELIST;

if (-1 == $#filelist)  {
    print STDERR "$0: Failed to generate file listing from $source_tar\n";
    exit 1;
}

$first = $filelist[0];
chomp $first;

$removefirst = 1;
for ($i = 0; $i <= $#filelist; $i++) {
    $removefirst = 0 if ($filelist[$i] !~ m/^\Q$first\E/);
}

$first = "" if (! $removefirst);

cd_system_fail $source_dir, 'tar', "x${decomp}f", $source_tar;

$source_tree = "$source_dir/$first";


for (my $i = 0; $i <= $#patch; $i++) {
    cd_system_fail $source_tree, "$patch_decomp[$i] $patch[$i] | patch -p1";
}

my $EXTRA;
$provides = "imap-client, mail-reader";

my $A = $package . 'me';
   
$EXTRA = <<EOM
Conflicts: $A
Replaces: $A
EOM
;

$prerm_remove_special = <<EOM
    
    if [ "\$2" = "in-favour" ] ; then
       case "\$3" in
       $A)
       # Rename of package detected
       exit 0
       ;;
       esac
    fi

EOM
;


write_config "$source_tree/config.deb",<<EOM

build_package='define'
optimize="-g -march=$arch"
d_shared_rev=".dummy.$release"
soname_include_path=n

defeditor='/usr/bin/editor'

EOM
    ;

cd_system_fail $source_tree, 'sh', 'Configure', '-b', '-c', "config.deb", '-P', $prefix;

$object_dir = $source_tree;

$config_sh = "$object_dir/config.sh";
%vars = load_vars($config_sh);

cd_system_fail $object_dir, 'make', 'all';
cd_system_fail $object_dir, 'make', 'package', "ROOT=$build_dir";

$readme = "$build_dir/README.PACKAGE.sh";
open(README,"<$readme") || die "$0: Failed to open $readme with error \"$!\" ";
$elmregister='';
$elmfilelist='';
while(<README>) {
    chomp;
    if (/^\.\/(.*\/elmregister) /) { $elmregister = $1; }
    if (/package filelist is on +\.\/(.*\/elm\.filelist)/) { $elmfilelist = $1; }
}
close(README);
die "$0: Failed to found elmregister from $readme " if $elmregister eq '';
die "$0: Failed to found elm.filelist from $readme " if $elmfilelist eq '';

$build_list = "$work_dir/filelist.data";


# BINARIES 


# List of all files
cd_system_fail $build_dir, "$elmregister list -R $build_dir -M all | sort | uniq > $build_list";
open(BUILDLIST,"<$build_list") || die "$0: Failed to open $build_list with error \"$!\" ";
$elmrc_write='';
$elmlibregister='';
while(<BUILDLIST>) {
    chomp;
    if (/^(.*\/elmrc-write)$/) { $elmrc_write=$1; }
    if (/(.*\/elmlibregister)$/) { $elmlibregister=$1; }
}
close(BUILDLIST);
die "$0: Failed to found elmrc-write from $build_list " if $elmrc_write eq '';
die "$0: Failed to found elmlibregister from $build_list " if $elmlibregister eq '';



# List of files without modules
$main_list = "$work_dir/filelist.data.main";
cd_system_fail $build_dir, "$elmregister list -R $build_dir | sort | uniq > $main_list";

# List of directories
$dir_list = "$work_dir/filelist.dirs";
cd_system_fail $build_dir, "$elmregister list-directories -R $build_dir -M all | sort | uniq > $dir_list";

%libraries=();
open(LIBLIST,"cat /etc/dpkg/shlibs.override /var/lib/dpkg/info/*.shlibs 2> /dev/null|") || 
    die "$0: Failed to run cat or read dpkg shlibs list ";
while(<LIBLIST>) {
    chomp;
    next if /^\#/;
    my ($lib,$vers,$deps) = split(/\s+/,$_,3);
    
    next if defined $libraries{"$lib.so.$vers"};

    $libraries{"$lib.so.$vers"} = $deps;
    $libraries{"$lib.so"} = $deps if ($vers eq '0');
}
close(LIBLIST);



# Global seen list
%have = ();

#temporary list
%needed = ();

%libneeded = ();

sub add_depend ($) {
    my ($file) = @_;
	
    open (OUTPUT,"objdump -p $file 2>/dev/null|") || die "$0: Failed to run objdump ";

    my %XX = ();
    my $name = '';
	
    while(<OUTPUT>) {
	chomp;
	
	if (/NEEDED\s+(\S+)$/) { $needed{$1} = 1; $XX{$1} = 1; }
	if (/SONAME\s+(\S+)$/) { $have{$1} = 1; $name = $1;}	
    }
    
    %{ $libneeded{$name} } = %XX if $name ne '';

    close(OUTPUT);  # Ignoring errors
}

sub generate_program_required (%) {
    my ($program) = @_;

    open (OUTPUT,"dpkg --search $program|") || die "$0: Failed to run dpkg ";
	
    my %provides=();
    
    while(<OUTPUT>) {
	chomp;
	
	if (/^(\S+(, \S+)*): .*\Q$program\E$/) {
	    my @a = split(/, /,$1);
		
	    for my $a ( @a ) { $provides{$a} = 1; }
	} 
    }    
    close(OUTPUT);  # Ignoring errors
    
    my $a = join(' | ', keys %provides);

    print "$program is needed but package do not found\n" if $a eq '';
	
    return $a;
}

sub generate_required1 (%) {
    my (%reqs) = @_;

    my %required = ();

    for my $soname ( keys %reqs ) {

	if ($have{$soname}) { next; };
	
	if (defined $libraries{$soname}) {
	    my @a = split(/ *, */,$libraries{$soname});
	    for my $a (@a) { $required{$a} = 1; }
	    
	    next;
	}

	open (OUTPUT,"dpkg --search $soname|") || die "$0: Failed to run dpkg ";
	
	my %provides=();
	
	while(<OUTPUT>) {
	    chomp;
	    
	    if (/^(\S+(, \S+)*): .*\b\Q$soname\E$/) {
		my @a = split(/, /,$1);
		
		for my $a ( @a ) { $provides{$a} = 1; }
	    } 
	}    
	close(OUTPUT);  # Ignoring errors
	
	my $a = join(' | ', keys %provides);
	
	$required{$a} = 1 if $a ne '';       
	print "$soname is needed but package do not found\n" if $a eq '';
    }

    return %required;
}

sub generate_required ($) {
    my ($list) = @_;

    # Reset needed module list
    %needed = ();

    open(MAINLIST,"<$list") || die "$0: Failed to open $list with error \"$!\" ";
    while(my $file = <MAINLIST>) {
	chomp $file;
	
	if (-x "$build_dir/$file" || $file =~ /\/lib.*\.so/) {
	    add_depend("$build_dir/$file");
	}	
    }
    close(MAINLIST);
    
    my %required = generate_required1 %needed;
    
    return %required;
}




%required_modules = generate_required($main_list);
%suggested_modules = ();
%tmp = generate_required($build_list);
for my $a ( keys %tmp ) {
    if (defined $required_modules{$a}) { next; };

    $suggested_modules{$a} = 1;
}


sub add_suggested_prog ($) {
    my ($var) = @_;

    if ($vars{$var} ne '') {
	return if $vars{$var} eq 'none';
	return if $vars{$var} =~ /builtin/;

	my $link = readlink($vars{$var});
	my $a;

	if ($link =~ m/^\/etc\/alternatives/) {
	    print "$vars{$var} is link to $link\n";

	    # But we can suggest real program here ...
	    
	    my $X1 = readlink $link;
	    return if $X1 eq '';
	    
	    $a = generate_program_required($X1);

	} else {
	    $a = generate_program_required($vars{$var});
	}

	if ($a ne '') {

	    $suggested_modules{$a} = 1 if ! defined $required_modules{$a}; 
	}
    } else {
	print "Variable $var not found\n";
    }
}

add_suggested_prog 'gpg_path';
add_suggested_prog 'pgp';
add_suggested_prog 'mailer';
add_suggested_prog 'pager';
add_suggested_prog 'defeditor';
add_suggested_prog 'emacs';
add_suggested_prog 'vi';
add_suggested_prog 'linepr';
add_suggested_prog 'metamail_path';

$XXelmfilelist = "$elmfilelist.gen-deb.$basename";

@build_files = ( $XXelmfilelist );


rename("$build_dir/$elmfilelist","$build_dir/$XXelmfilelist") || 
    die "$0: Failed to rename $build_dir/$elmfilelist => $build_dir/$XXelmfilelist with error \"$!\" "; 


# DOCUMENTS

cd_system_fail $build_dir, 'mkdir', '-p', "./$docdir";
@docdirlist=( $docdir );

sub install_doc ($) {
   my ($file) = @_; 

   cd_system_fail $source_tree, 'install', '-m', '644', $file, "$build_dir/$docdir/$file";
   my $A = "$docdir/$file"; $A =~ s/^\/+//;

   push(@build_files, $A);
}



sub install_docdir ($) {
    my ($file) = @_;

    $file = "$docdir/$file";
    $file =~ s/^\/+//;

    cd_system_fail $build_dir, 'mkdir', '-p', $file;
    push(@docdirlist,$file);
}



install_doc "README.ME+";
install_doc "NOTICE";
install_doc "MIME.txt";
install_doc "Overview";
install_doc "ANNOUNCE.ME";
install_doc "ChangeLog.ME";
install_doc "Patchlist";
install_doc "Changes";
install_doc "Instruct";
install_doc "README";
install_docdir "doc";
install_doc "doc/elmrc.samp";
install_doc "doc/mime.charsets";
install_doc "doc/mime.types";
install_doc "doc/terminal.info";
install_docdir "shared_libs/tls";
install_doc "shared_libs/tls/README.ME+";
install_docdir "shared_libs/iconv";
install_doc "shared_libs/iconv/README.ME+";
install_docdir "shared_libs/smtp";
install_doc "shared_libs/smtp/README.ME+";


$group=$vars{'mailgrp'}||'0';

cd_system_fail $build_dir, 'tar', 'czf', "$work_dir/data.tar.gz", '--owner=0', "--group=$group", 
    "--files-from=$build_list", @build_files;

# CONFIG FILES

@config_files = ();

$depends = join(', ', keys %required_modules);
$suggest = join(', ', keys %suggested_modules);

sub write_config_file ($$) {
    my ($file,$content) = @_;

    write_config "$control_dir/$file", $content;

    push(@config_files,$file);
}

sub write_config_script ($$) {
    my ($file,$content) = @_;

    write_config_file $file,$content;
    chmod 0755,"$control_dir/file" || die "chmod for $control_dir/file  with error \"$!\" ";
}



$AA = <<EOM
Package: $package
Version: $version
Maintainer: $packager
Architecture: $arch
Section: mail
Depends: $depends
Recommends: sendmail | mail-transport-agent
Suggests: $suggest
Provides: $provides
Description: Text-based mailreader supporting MIME, GPG, PGP
 Elm ME+ - an interactive mail system, Millennium Edition
 .
 Elm 2.4 ME+ is based on Elm 2.4. It contains enhanced MIME and character 
 set support. It can read mail from POP or IMAP folders and can pass mail 
 to the PGP or GPG programs.
EOM
    ;

$AA .= $EXTRA;

write_config_file "control",$AA;

$result = '';
for my $library ( keys %have) {
    
    if ($library =~ /^(.*)\.so(\.(.*)|)$/) {
	my $lib = $1;
	my $ver = $3;
	my $add = '';

	if (ref $libneeded{$library}) {
	    my %required = generate_required1 %{ $libneeded{$library} };
	    $add = ', ' . join(', ', keys %required);
	}

	$ver = 0 if $ver eq '';

	$result .= "$lib $ver $package$add\n"; 
    }
}

write_config_file "shlibs", $result if $result ne '';

die "etc is not set " if $vars{'etc'} eq '';
die "lib is not set " if $vars{'lib'} eq '';

# dpkg seems fail extract files if tar file does not include
# directories, so we precreate directories
$commands = '';

my @temp = ();
open(DIRLIST,"<$dir_list") || die "$0: Failed to open $dir_list with error \"$!\" ";
while(<DIRLIST>) {
    chomp;

    my $a = $_;
    $a = "/$_" if ! /^\//;

    $commands .=  "mkdir -p \"$a\"\n";
    push(@temp,$a);
}
close(DIRLIST);

for (@docdirlist) {
    my $a = $_;
    $a = "/$_" if ! /^\//;

    $commands .=  "mkdir -p \"$a\"\n";
    push(@temp,$a);
}

# These are considered to be provided by system
# and not owned by package
%skip = ();
for my $x (qw( etc lib shlib bin mansrc catmansrc ))  {
    next if $vars{$x} eq '';
    $skip{ $vars{$x} } = 1;
}


# These are also considered to be standard directories
for my $x (qw( etc lib bin man var src include )) {
    $skip{ "$prefix/$x" } = 1; 
}

# Also all parent directories are owned by system
my @XX = keys %skip;
while (defined ($aa = pop @XX)) {

    if ($aa =~ /^(.*)\/[^\/]*$/) {
	my $d = $1;
	
	if (! $skip{$d} ) {
	    $skip{$d} = 1;
	    push(@XX,$aa);
	}
    }
} 

$rmdircommands='';
for (reverse @temp) {
    chomp;

    next if $skip{ $_ };

    # This does not remove parents
    $rmdircommands .= "rmdir --ignore-fail-on-non-empty \"$_\" 2> /dev/null || true\n";
}


$XXshlib='';
if ($vars{'shlib'} ne '') {
    $XXshlib=<<EOM
# shared libraries
mkdir -p "$vars{'shlib'}"
EOM
;
}


write_config_script "preinst",<<EOM
#!/bin/sh -e

# dpkg seems not handle tar files which do not include directories
# therefore directories are pre-created

# public config files
mkdir -p "$vars{'etc'}"

# miscellaneous files
mkdir -p "$vars{'lib'}"

$XXshlib


$commands

case "\$1" in
    upgrade)
        # this version is going to be installed

    ;;

    install)
        # no old version or only configuration files behind
    ;;

    abort-upgrade)

    ;;

esac


exit 0
EOM
    ;


write_config_script "postinst",<<EOM
#!/bin/sh -e

case "\$1" in
    configure)

    # Following files are created or rebuild on replay stage
    F=$vars{'etc'}/elm.mimecharsets
    if [ -f \$F ] ; then
        cp -p \$F \$F.debsave
    fi
    F=$vars{'etc'}/elm.terminalinfo
    if [ -f \$F ] ; then
        cp -p \$F \$F.debsave
    fi
    F=$vars{'etc'}/elm.mimetypes
    if [ -f \$F ] ; then
        cp -p \$F \$F.debsave
    fi
    F=$vars{'etc'}/elm.mailinglists
    if [ -f \$F ] ; then
        cp -p \$F \$F.debsave
    fi
    F=$vars{'etc'}/elm.rc
    if [ -f \$F ] ; then
        cp -p \$F \$F.debsave
    fi
    # record only old values before this installation to elm.rc.old-values
    F=$vars{'etc'}/elm.rc.old-values
    if [ -f \$F ] ; then
        mv -f \$F \$F.debsave
    fi

    err=0
    /$elmregister replay -M all -F /$XXelmfilelist || err=\$?
    cat /$XXelmfilelist >> /$elmfilelist
    rm /$XXelmfilelist
    /$elmregister unstage -M all || true


    if [ ! -f $vars{'etc'}/elm.rc.debsave ]
    then
        cat <<'EOX'

=============================================================
Edit $vars{'etc'}/elm.rc configuration file and specify on 

mailer= 

line capabilites of $vars{'mailer'}. Default value of this
line is printed with

$vars{'bin'}/elm -vvv 

command.
=============================================================

EOX
    fi

    exit \$err

    ;;

    abort-remove)
    
    echo "\$0: abort-remove is not possible"
    exit 1

    ;;

    abort-upgrade|abort-deconfigure)

    err=0
    F=$vars{'etc'}/elm.rc.old-values
    if [ -f \$F ] ; then
         /$elmrc_write -IG \$F || true
    fi
    /$elmrc_write -IG -c \$F   || err=\$?
    /$elmlibregister -IG -c \$F || err=\$?
    /$elmregister unstage  || true

    exit \$err

    ;;
esac

exit 0
EOM
    ;

write_config_script "prerm",<<EOM
#!/bin/sh -e

case "\$1" in
    remove)

    $prerm_remove_special
    /$elmregister uninstall -M all

    ;;

    failed-upgrade)
         # Cleanup for old version when 'upgrade' fails
         # old version is removed and this version is installed

    ;;

    upgrade)
        # This version is removed and upgraded

    ;;

    deconfigure)
        # This version is coing to be removed because of conflict
        #  ... but 'remove' is called later also

    ;;

    abort-install)

    ;;


esac

exit 0
EOM
    ;


write_config_script "postrm",<<EOM
#!/bin/sh -e

case "\$1" in
    remove)

    # We return these files to original places, so that
    # these are used when elm is re-installed
    F=$vars{'etc'}/elm.mimecharsets
    if [ -f \$F.debsave -a ! -f \$F ] ; then
        cp -p \$F.debsave \$F
    fi
    F=$vars{'etc'}/elm.terminalinfo
    if [ -f \$F.debsave -a ! -f \$F ] ; then
        cp -p \$F.debsave \$F
    fi
    F=$vars{'etc'}/elm.mimetypes
    if [ -f \$F.debsave -a ! -f \$F ] ; then
        cp -p \$F.debsave \$F
    fi
    F=$vars{'etc'}/elm.mailinglists
    if [ -f \$F.debsave -a ! -f \$F ] ; then
        cp -p \$F.debsave \$F
    fi
    F=$vars{'etc'}/elm.rc
    if [ -f \$F.debsave -a ! -f \$F ] ; then
        cp -p \$F.debsave \$F
    fi
    F=$vars{'etc'}/elm.rc.old-values
    rm \$F

    ;;

    disappear)
    # My all files was overwritten ...

    ;;

    abort-install)

    ;;

    abort-upgrade)

    ;;

    upgrade)
    # Files from new version is installed

    ;;

    failed-upgrade)

    ;;

    abort-upgrade)

    ;;

    purge)
    # This is assumed to remove left of configuration files

    if [ -f /$elmlibregister ]
    then
       echo "\$0: Manual installation detected ... will not purge files"
       exit 1
    fi

    rm -f /$elmfilelist

    F=$vars{'etc'}/elm.mimecharsets
    rm -f \$F.debsave \$F

    F=$vars{'etc'}/elm.terminalinfo
    rm -f \$F.debsave \$F

    F=$vars{'etc'}/elm.mimetypes
    rm -f \$F.debsave \$F

    F=$vars{'etc'}/elm.mailinglists
    rm -f \$F.debsave \$F

    F=$vars{'etc'}/elm.rc
    rm -f \$F.debsave \$F

    ;;
esac

$rmdircommands

exit 0
EOM
    ;


cd_system_fail $control_dir, 'tar', 'czf', "$work_dir/control.tar.gz", '--owner=0', '--group=0', 
    @config_files;


# PACKAGE

write_config "$work_dir/debian-binary", "2.0\n";

#my $result = "$mydir/${package}_${version}_${arch}.deb";
my $result = "$mydir/$basename$extra.${arch}.deb";

cd_system_fail $work_dir, 'ar', 'r', $result, 'debian-binary', 'control.tar.gz', 'data.tar.gz';

if ($remove) {
    system "rm", "-rvf", "--", @remove;
}

print "Wrote: $result\n";

exit 0;