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#!/usr/bin/perl
#
# dpkg-scanpackages
#
# Copyright © 2006-2015 Guillem Jover <guillem@debian.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
use warnings;
use strict;
use Getopt::Long qw(:config posix_default bundling_values no_ignorecase);
use List::Util qw(none);
use File::Find;
use Dpkg ();
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use Dpkg::Control;
use Dpkg::Version;
use Dpkg::Checksums;
use Dpkg::Compression::FileHandle;
textdomain('dpkg-dev');
# Do not pollute STDOUT with info messages
report_options(info_fh => \*STDERR);
my (@samemaint, @changedmaint);
my @multi_instances;
my @spuriousover;
my %packages;
my %overridden;
my @checksums;
my %options = (
help => sub { usage(); exit 0; },
version => sub { version(); exit 0; },
type => undef,
arch => undef,
hash => undef,
multiversion => 0,
'extra-override' => undef,
medium => undef,
);
my @options_spec = (
'help|?',
'version',
'type|t=s',
'arch|a=s',
'hash|h=s',
'multiversion|m!',
'extra-override|e=s',
'medium|M=s',
);
sub version {
printf g_("Debian %s version %s.\n"), $Dpkg::PROGNAME, $Dpkg::PROGVERSION;
}
sub usage {
printf g_(
"Usage: %s [<option>...] <binary-path> [<override-file> [<path-prefix>]] > Packages
Options:
-t, --type <type> scan for <type> packages (default is 'deb').
-a, --arch <arch> architecture to scan for.
-h, --hash <hash-list> only generate hashes for the specified list.
-m, --multiversion allow multiple versions of a single package.
-e, --extra-override <file>
use extra override file.
-M, --medium <medium> add X-Medium field for dselect media access method
-?, --help show this help message.
--version show the version.
"), $Dpkg::PROGNAME;
}
sub load_override
{
my $override = shift;
my $comp_file = Dpkg::Compression::FileHandle->new(filename => $override);
while (<$comp_file>) {
s/\#.*//;
s/\s+$//;
next unless $_;
my ($p, $priority, $section, $maintainer) = split(/\s+/, $_, 4);
if (not defined($packages{$p})) {
push(@spuriousover, $p);
next;
}
for my $package (@{$packages{$p}}) {
if ($maintainer) {
if ($maintainer =~ m/(.+?)\s*=\>\s*(.+)/) {
my $oldmaint = $1;
my $newmaint = $2;
my $debmaint = $$package{Maintainer};
if (none { $debmaint eq $_ } split m{\s*//\s*}, $oldmaint) {
push(@changedmaint,
sprintf(g_(' %s (package says %s, not %s)'),
$p, $$package{Maintainer}, $oldmaint));
} else {
$$package{Maintainer} = $newmaint;
}
} elsif ($$package{Maintainer} eq $maintainer) {
push(@samemaint, " $p ($maintainer)");
} else {
warning(g_('unconditional maintainer override for %s'), $p);
$$package{Maintainer} = $maintainer;
}
}
$$package{Priority} = $priority;
$$package{Section} = $section;
}
$overridden{$p} = 1;
}
close($comp_file);
}
sub load_override_extra
{
my $extra_override = shift;
my $comp_file = Dpkg::Compression::FileHandle->new(filename => $extra_override);
while (<$comp_file>) {
s/\#.*//;
s/\s+$//;
next unless $_;
my ($p, $field, $value) = split(/\s+/, $_, 3);
next unless defined($packages{$p});
for my $package (@{$packages{$p}}) {
$$package{$field} = $value;
}
}
close($comp_file);
}
sub process_deb {
my ($pathprefix, $fn) = @_;
my $fields = Dpkg::Control->new(type => CTRL_REPO_PKG);
open my $output_fh, '-|', 'dpkg-deb', '-I', $fn, 'control'
or syserr(g_('cannot fork for %s'), 'dpkg-deb');
$fields->parse($output_fh, $fn)
or error(g_("couldn't parse control information from %s"), $fn);
close $output_fh;
if ($?) {
warning(g_("'dpkg-deb -I %s control' exited with %d, skipping package"),
$fn, $?);
return;
}
my $p = $fields->{'Package'};
error(g_('no Package field in control file of %s'), $fn)
if not defined $p;
if (defined($packages{$p}) and not $options{multiversion}) {
my $pkg = ${$packages{$p}}[0];
@multi_instances = ($pkg->{Filename}) if @multi_instances == 0;
push @multi_instances, "$pathprefix$fn";
if (version_compare_relation($fields->{'Version'}, REL_GT,
$pkg->{'Version'}))
{
warning(g_('package %s (filename %s) is repeat but newer ' .
'version; used that one and ignored data from %s!'),
$p, $fn, $pkg->{Filename});
$packages{$p} = [];
} else {
warning(g_('package %s (filename %s) is repeat; ' .
'ignored that one and using data from %s!'),
$p, $fn, $pkg->{Filename});
return;
}
}
warning(g_('package %s (filename %s) has Filename field!'), $p, $fn)
if defined($fields->{'Filename'});
$fields->{'Filename'} = "$pathprefix$fn";
my $sums = Dpkg::Checksums->new();
$sums->add_from_file($fn, checksums => \@checksums);
foreach my $alg (@checksums) {
if ($alg eq 'md5') {
$fields->{'MD5sum'} = $sums->get_checksum($fn, $alg);
} else {
$fields->{$alg} = $sums->get_checksum($fn, $alg);
}
}
$fields->{'Size'} = $sums->get_size($fn);
$fields->{'X-Medium'} = $options{medium} if defined $options{medium};
push @{$packages{$p}}, $fields;
}
{
local $SIG{__WARN__} = sub { usageerr($_[0]) };
GetOptions(\%options, @options_spec);
}
if (not 1 <= @ARGV <= 3) {
usageerr(g_('one to three arguments expected'));
}
my $type = $options{type} // 'deb';
my $arch = $options{arch};
my %hash = map { $_ => 1 } split /,/, $options{hash} // '';
foreach my $alg (keys %hash) {
if (not checksums_is_supported($alg)) {
usageerr(g_('unsupported checksum \'%s\''), $alg);
}
}
@checksums = %hash ? keys %hash : checksums_get_list();
my ($binarypath, $override, $pathprefix) = @ARGV;
if (not -e $binarypath) {
error(g_('binary path %s not found'), $binarypath);
}
if (defined $override and not -e $override) {
error(g_('override file %s not found'), $override);
}
$pathprefix //= '';
my $find_filter;
if ($options{arch}) {
$find_filter = qr/_(?:all|${arch})\.$type$/;
} else {
$find_filter = qr/\.$type$/;
}
my @archives;
my $scan_archives = sub {
push @archives, $File::Find::name if m/$find_filter/;
};
find({ follow => 1, follow_skip => 2, wanted => $scan_archives}, $binarypath);
foreach my $fn (@archives) {
process_deb($pathprefix, $fn);
}
load_override($override) if defined $override;
load_override_extra($options{'extra-override'}) if defined $options{'extra-override'};
my @missingover = ();
my $records_written = 0;
for my $p (sort keys %packages) {
if (defined($override) and not defined($overridden{$p})) {
push @missingover, $p;
}
for my $package (sort { $a->{Version} cmp $b->{Version} } @{$packages{$p}}) {
print("$package\n") or syserr(g_('failed when writing stdout'));
$records_written++;
}
}
close(STDOUT) or syserr(g_("couldn't close stdout"));
if (@multi_instances) {
warning(g_('Packages with multiple instances but no --multiversion specified:'));
warning($_) foreach (sort @multi_instances);
}
if (@changedmaint) {
warning(g_('Packages in override file with incorrect old maintainer value:'));
warning($_) foreach (@changedmaint);
}
if (@samemaint) {
warning(g_('Packages specifying same maintainer as override file:'));
warning($_) foreach (@samemaint);
}
if (@missingover) {
warning(g_('Packages in archive but missing from override file:'));
warning(' %s', join(' ', @missingover));
}
if (@spuriousover) {
warning(g_('Packages in override file but not in archive:'));
warning(' %s', join(' ', @spuriousover));
}
info(g_('Wrote %s entries to output Packages file.'), $records_written);