CasperSecurity
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#!/usr/bin/perl
#
# Copyright © 1999 Roderick Schertler
# Copyright © 2002 Wichert Akkerman <wakkerma@debian.org>
# Copyright © 2006-2009, 2011-2015 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 strict;
use warnings;
use Getopt::Long qw(:config posix_default bundling_values no_ignorecase);
use List::Util qw(any);
use File::Find;
use Dpkg ();
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use Dpkg::Control;
use Dpkg::Checksums;
use Dpkg::Compression::FileHandle;
use Dpkg::Compression;
textdomain('dpkg-dev');
# Hash of lists. The constants below describe what is in the lists.
my %override;
use constant {
O_PRIORITY => 0,
O_SECTION => 1,
O_MAINT_FROM => 2, # undef for non-specific, else listref
O_MAINT_TO => 3, # undef if there's no maint override
};
my %extra_override;
my %priority = (
'extra' => 1,
'optional' => 2,
'standard' => 3,
'important' => 4,
'required' => 5,
);
# Switches
my $debug = 0;
my $no_sort = 0;
my $src_override = undef;
my $extra_override_file = undef;
my @sources;
my @option_spec = (
'debug!' => \$debug,
'help|?' => sub { usage(); exit 0; },
'version' => sub { version(); exit 0; },
'no-sort|n' => \$no_sort,
'source-override|s=s' => \$src_override,
'extra-override|e=s' => \$extra_override_file,
);
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>]] > Sources
Options:
-n, --no-sort don't sort by package before outputting.
-e, --extra-override <file>
use extra override file.
-s, --source-override <file>
use file for additional source overrides, default
is regular override file with .src appended.
--debug turn debugging on.
-?, --help show this help message.
--version show the version.
See the man page for the full documentation.
"), $Dpkg::PROGNAME;
}
sub load_override {
my $file = shift;
local $_;
my $comp_file = Dpkg::Compression::FileHandle->new(filename => $file);
while (<$comp_file>) {
s/#.*//;
next if /^\s*$/;
s/\s+$//;
my @data = split ' ', $_, 4;
unless (@data == 3 || @data == 4) {
warning(g_('invalid override entry at line %d (%d fields)'),
$., 0 + @data);
next;
}
my ($package, $priority, $section, $maintainer) = @data;
if (exists $override{$package}) {
warning(g_('ignoring duplicate override entry for %s at line %d'),
$package, $.);
next;
}
if (!$priority{$priority}) {
warning(g_('ignoring override entry for %s, invalid priority %s'),
$package, $priority);
next;
}
$override{$package} = [];
$override{$package}[O_PRIORITY] = $priority;
$override{$package}[O_SECTION] = $section;
if (!defined $maintainer) {
# do nothing
}
elsif ($maintainer =~ /^(.*\S)\s*=>\s*(.*)$/) {
$override{$package}[O_MAINT_FROM] = [split m{\s*//\s*}, $1];
$override{$package}[O_MAINT_TO] = $2;
}
else {
$override{$package}[O_MAINT_TO] = $maintainer;
}
}
close($comp_file);
}
sub load_src_override {
my ($user_file, $regular_file) = @_;
my ($file);
local $_;
if (defined $user_file) {
$file = $user_file;
}
elsif (defined $regular_file) {
my $comp = compression_guess_from_filename($regular_file);
if (defined($comp)) {
$file = $regular_file;
my $ext = compression_get_property($comp, 'file_ext');
$file =~ s/\.$ext$/.src.$ext/;
} else {
$file = "$regular_file.src";
}
return unless -e $file;
}
else {
return;
}
debug(1, "source override file $file");
my $comp_file = Dpkg::Compression::FileHandle->new(filename => $file);
while (<$comp_file>) {
s/#.*//;
next if /^\s*$/;
s/\s+$//;
my @data = split ' ';
unless (@data == 2) {
warning(g_('invalid source override entry at line %d (%d fields)'),
$., 0 + @data);
next;
}
my ($package, $section) = @data;
my $key = "source/$package";
if (exists $override{$key}) {
warning(g_('ignoring duplicate source override entry for %s at line %d'),
$package, $.);
next;
}
$override{$key} = [];
$override{$key}[O_SECTION] = $section;
}
close($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);
$extra_override{$p}{$field} = $value;
}
close($comp_file);
}
# Given PREFIX and DSC-FILE, process the file and returns the fields.
sub process_dsc {
my ($prefix, $file) = @_;
my $basename = $file;
my $dir = ($basename =~ s{^(.*)/}{}) ? $1 : '';
$dir = "$prefix$dir";
$dir =~ s{/+$}{};
$dir = '.' if $dir eq '';
# Parse ‘.dsc’ file.
my $fields = Dpkg::Control->new(type => CTRL_PKG_SRC);
$fields->load($file);
$fields->set_options(type => CTRL_INDEX_SRC);
# Get checksums
my $checksums = Dpkg::Checksums->new();
$checksums->add_from_file($file, key => $basename);
$checksums->add_from_control($fields, use_files_for_md5 => 1);
my $source = $fields->{Source};
my @binary = split /\s*,\s*/, $fields->{Binary} // '';
error(g_('no binary packages specified in %s'), $file) unless (@binary);
# Rename the source field to package.
$fields->{Package} = $fields->{Source};
delete $fields->{Source};
# The priority for the source package is the highest priority of the
# binary packages it produces.
my @binary_by_priority = sort {
($override{$a} ? $priority{$override{$a}[O_PRIORITY]} : 0)
<=>
($override{$b} ? $priority{$override{$b}[O_PRIORITY]} : 0)
} @binary;
my $priority_override = $override{$binary_by_priority[-1]};
my $priority = $priority_override
? $priority_override->[O_PRIORITY]
: undef;
$fields->{Priority} = $priority if defined $priority;
# For the section override, first check for a record from the source
# override file, else use the regular override file.
my $section_override = $override{"source/$source"} || $override{$source};
my $section = $section_override
? $section_override->[O_SECTION]
: undef;
$fields->{Section} = $section if defined $section;
# For the maintainer override, use the override record for the first
# binary. Modify the maintainer if necessary.
my $maintainer_override = $override{$binary[0]};
if ($maintainer_override && defined $maintainer_override->[O_MAINT_TO]) {
if (!defined $maintainer_override->[O_MAINT_FROM] ||
any { $fields->{Maintainer} eq $_ }
@{ $maintainer_override->[O_MAINT_FROM] }) {
$fields->{Maintainer} = $maintainer_override->[O_MAINT_TO];
}
}
# Process extra override
if (exists $extra_override{$source}) {
my ($field, $value);
while (($field, $value) = each %{$extra_override{$source}}) {
$fields->{$field} = $value;
}
}
# A directory field will be inserted just before the files field.
$fields->{Directory} = $dir;
$checksums->export_to_control($fields, use_files_for_md5 => 1);
push @sources, $fields;
}
### Main
{
local $SIG{__WARN__} = sub { usageerr($_[0]) };
GetOptions(@option_spec);
}
usageerr(g_('one to three arguments expected'))
if @ARGV < 1 or @ARGV > 3;
push @ARGV, undef if @ARGV < 2;
push @ARGV, '' if @ARGV < 3;
my ($dir, $override, $prefix) = @ARGV;
report_options(debug_level => $debug);
load_override $override if defined $override;
load_src_override $src_override, $override;
load_override_extra $extra_override_file if defined $extra_override_file;
my @dsc;
my $scan_dsc = sub {
push @dsc, $File::Find::name if m/\.dsc$/;
};
find({ follow => 1, follow_skip => 2, wanted => $scan_dsc }, $dir);
foreach my $fn (@dsc) {
# FIXME: Fix it instead to not die on syntax and general errors?
eval {
process_dsc($prefix, $fn);
};
if ($@) {
warn $@;
next;
}
}
if (not $no_sort) {
@sources = sort {
$a->{Package} . $a->{Version} cmp $b->{Package} . $b->{Version}
} @sources;
}
foreach my $dsc (@sources) {
$dsc->output(\*STDOUT);
print "\n";
}