/usr/share/perl5/Sbuild/AptResolver.pm is in libsbuild-perl 0.73.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 | # ResolverBase.pm: build library for sbuild
# Copyright © 2005 Ryan Murray <rmurray@debian.org>
# Copyright © 2005-2008 Roger Leigh <rleigh@debian.org>
# Copyright © 2008 Simon McVittie <smcv@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
# <http://www.gnu.org/licenses/>.
#
#######################################################################
package Sbuild::AptResolver;
use strict;
use warnings;
use Sbuild qw(debug copy);
use Sbuild::Base;
use Sbuild::ResolverBase;
BEGIN {
use Exporter ();
our (@ISA, @EXPORT);
@ISA = qw(Exporter Sbuild::ResolverBase);
@EXPORT = qw();
}
sub new {
my $class = shift;
my $conf = shift;
my $session = shift;
my $host = shift;
my $self = $class->SUPER::new($conf, $session, $host);
bless($self, $class);
return $self;
}
sub install_deps {
my $self = shift;
my $name = shift;
my @pkgs = @_;
my $status = 0;
my $session = $self->get('Session');
my $dummy_pkg_name = $self->get_sbuild_dummy_pkg_name($name);
# Call functions to setup an archive to install dummy package.
$self->log_subsubsection("Setup apt archive");
if (!$self->setup_apt_archive($dummy_pkg_name, @pkgs)) {
$self->log_error("Setting up apt archive failed");
return 0;
}
if (!$self->update_archive()) {
$self->log_error("Updating apt archive failed");
return 0;
}
$self->log_subsubsection("Install $name build dependencies (apt-based resolver)");
# Install the dummy package
my (@instd, @rmvd);
$self->log("Installing build dependencies\n");
my @apt_args = ("-yf", \@instd, \@rmvd, 'install', $dummy_pkg_name);
if (!$self->run_apt(@apt_args)) {
$self->log_error("Package installation failed\n");
if (defined ($self->get('Session')->get('Session Purged')) &&
$self->get('Session')->get('Session Purged') == 1) {
$self->log("Not removing build depends: cloned chroot in use\n");
} else {
$self->set_installed(@instd);
$self->set_removed(@rmvd);
goto package_cleanup;
}
return 0;
}
$self->set_installed(@instd);
$self->set_removed(@rmvd);
$status = 1;
package_cleanup:
if ($status == 0) {
if (defined ($session->get('Session Purged')) &&
$session->get('Session Purged') == 1) {
$self->log("Not removing installed packages: cloned chroot in use\n");
} else {
$self->uninstall_deps();
}
}
return $status;
}
sub purge_extra_packages {
my $self = shift;
my $name = shift;
my $dummy_pkg_name = $self->get_sbuild_dummy_pkg_name($name);
my $session = $self->get('Session');
# we partition the packages into those we want to mark as manual (all of
# Essential:yes plus sbuild dummy packages) and those we want to mark as
# auto
#
# We don't use the '*' glob of apt-mark because then we'd have all packages
# apt knows about in the build log.
my $pipe = $session->pipe_command({
COMMAND => [ 'dpkg-query', '--showformat', '${Essential} ${Package}\\n', '--show' ],
USER => $self->get_conf('BUILD_USER')
});
if (!$pipe) {
$self->log_error("unable to execute dpkg-query\n");
return 0;
}
my @essential;
my @nonessential;
while (my $line = <$pipe>) {
chomp $line;
if ($line !~ /^(yes|no) ([a-zA-Z0-9][a-zA-Z0-9+.-]*)$/) {
$self->log_error("dpkg-query output has unexpected format\n");
return 0;
}
# we only want to keep packages that are Essential:yes and the dummy
# packages created by sbuild. Apt takes care to also keep their
# transitive dependencies.
if ($1 eq "yes" || $2 eq $dummy_pkg_name || $2 eq $self->get_sbuild_dummy_pkg_name('core')) {
push @essential, $2;
} else {
push @nonessential, $2;
}
}
close $pipe;
if (scalar @essential == 0) {
$self->log_error("no essential packages found \n");
return 0;
}
if (scalar @nonessential == 0) {
$self->log_error("no non-essential packages found \n");
return 0;
}
if (!$session->run_command({ COMMAND => [ 'apt-mark', 'auto', @nonessential ], USER => 'root' })) {
$self->log_error("unable to run apt-mark\n");
return 0;
}
# We must mark all Essential:yes packages as manual because later on we
# must run apt with --allow-remove-essential so that apt agrees to remove
# itself and at that point we don't want to remove the Essential:yes
# packages.
if (!$session->run_command({ COMMAND => [ 'apt-mark', 'manual', @essential ], USER => 'root' })) {
$self->log_error("unable to run apt-mark\n");
return 0;
}
# apt currently suffers from bug #837066. It will never autoremove
# priority:required packages, thus we use a temporary (famous last words)
# hack here and feed apt a modified /var/lib/dpkg/status file with all
# packages marked as Priority:extra. This is a hack because
# /var/lib/dpkg/status should not be read by others than dpkg (we for
# example do not take into account the journal that way).
my $read_fh = $session->pipe_command({
COMMAND => [ 'sed', 's/^Priority: .*$/Priority: extra/', '/var/lib/dpkg/status' ],
USER => $self->get_conf('BUILD_USER')
});
if (!$read_fh) {
$session->log_error("cannot run sed\n");
return 0;
}
my $tmpfilename = $session->mktemp({ USER => $self->get_conf('BUILD_USER') });
if (!$tmpfilename) {
$session->log_error("cannot mktemp\n");
return 0;
}
my $write_fh = $session->get_write_file_handle($tmpfilename);
if (!$write_fh) {
$session->log_error("cannot open $tmpfilename for writing\n");
return 0;
}
while (read($read_fh, my $buffer, 1024)) {
print $write_fh $buffer;
}
close $read_fh;
close $write_fh;
my (@instd, @rmvd);
# apt considers itself as Essential:yes, that's why we need
# --allow-remove-essential to remove it and that's why we must explicitly
# specify to remove it.
#
# The /dev/null prevents apt from overriding the Priorities that we set in
# our modified dpkg status file by the ones it finds in the package list
# files
$self->run_apt("-yf", \@instd, \@rmvd, 'autoremove',
'apt',
'-o', 'Dir::State::Lists=/dev/null',
'-o', "Dir::State::Status=$tmpfilename",
'--allow-remove-essential');
$session->unlink($tmpfilename);
}
1;
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