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#!/usr/bin/perl
#
# Package for converting from a .deb file.
package From::deb;
use strict;
# Global variable initialization.
# This is set to 1 if dpkg-deb is in the path.
my $dpkg_deb=undef;
my $dir;
foreach $dir (split(/:/,$ENV{PATH})) {
if (-x "$dir/dpkg-deb") {
$dpkg_deb=1;
last;
}
}
# Query a deb file for fields, and return a hash of the fields found.
# Pass the filename of the deb file to query.
sub GetFields { my ($self,$file)=@_;
my %fields;
# Extract the control file from the deb file.
my @control;
if ($dpkg_deb) {
@control = `dpkg-deb --info $file control`;
}
else {
@control = `ar p $file control.tar.gz | tar Oxzf - control`;
}
# Parse control file and extract fields.
my $i=0;
while ($i<=$#control) {
$_ = $control[$i];
chomp;
$fields{NAME} = $1 if (/^Package:\s*(.+)/i);
$fields{VERSION} = $1 if (/^Version:\s*(.+)/i);
$fields{ARCH} = $1 if (/^Architecture:\s*(.+)/i);
$fields{MAINTAINER} = $1 if (/^Maintainer:\s*(.+)/i);
$fields{DEPENDS} = $1 if (/^Depends:\s*(.+)/i);
$fields{REQUIRES} = $1 if (/^Requires:\s*(.+)/i);
$fields{GROUP} = $1 if (/^Section:\s*(.+)/i);
if (/^Description:\s*(.+)/i) {
$fields{SUMMARY} = "$1";
$i++;
while (($i<=$#control) && ($control[$i])) {
$control[$i] =~ s/^ //g; #remove leading space
$control[$i] = "\n" if ($control[$i] eq ".\n");
$fields{DESCRIPTION}.=$control[$i];
$i++;
}
$i--;
}
$i++;
}
$fields{COPYRIGHT}="see /usr/share/doc/$fields{NAME}/copyright";
$fields{GROUP}="unknown" if (!$fields{GROUP});
$fields{DISTRIBUTION}="Debian";
if ($fields{VERSION} =~ /(.+)-(.+)/) {
$fields{VERSION} = $1;
$fields{RELEASE} = $2;
} else {
$fields{RELEASE} = '1';
}
# Just get rid of epochs for now.
if ($fields{VERSION} =~ /\d+:(.*)/) {
$fields{VERSION} = $1;
}
# Read in the list of conffiles, if any.
if ($dpkg_deb) {
$fields{CONFFILES}=`dpkg-deb --info $file conffiles 2>/dev/null`;
}
else {
$fields{CONFFILES}=
`ar p $file control.tar.gz | tar Oxzf - conffiles 2>/dev/null`;
}
# Read in the list of all files.
# Note that tar doesn't supply a leading `/', so we have to add that.
$fields{FILELIST}=undef;
if ($dpkg_deb) {
my $fn;
foreach $fn (`dpkg-deb --fsys-tarfile $file | tar tf -`) {
$fields{FILELIST}.="/$fn";
}
}
else {
my $fn;
foreach $fn (`ar p $file data.tar.gz | tar tzf -`) {
$fields{FILELIST}.="/$fn";
}
}
if ($main::scripts) {
# Read in the scripts, if any.
my $field;
for $field ('postinst', 'postrm', 'preinst', 'prerm') {
if ($dpkg_deb) {
$fields{uc($field)}=`dpkg-deb --info $file $field 2>/dev/null`;
}
else {
$fields{uc($field)}=
`ar p $file control.tar.gz | tar Oxzf - $field 2>/dev/null`;
}
}
}
$fields{RELEASE}++ unless $main::keep_version;
return %fields;
}
# Handles unpacking of debs.
sub Unpack { my ($self,$file,%fields)=@_;
if ($dpkg_deb) {
Alien::SafeSystem ("(cd ..;dpkg-deb -x $file $fields{NAME}-$fields{VERSION})",
"Error unpacking $file\n");
}
else {
Alien::SafeSystem ("(cd ..;ar p $file data.tar.gz) | tar zxpf -",
"Error unpacking $file\n");
}
}
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