671 lines
16 KiB
Plaintext
671 lines
16 KiB
Plaintext
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#!/usr/bin/perl
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# Debian task selector, mark II.
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# Copyright 2004-2011 by Joey Hess <joeyh@debian.org>.
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# Licensed under the GPL, version 2 or higher.
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use 5.014;
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use Locale::gettext;
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use Getopt::Long;
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use warnings;
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use strict;
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textdomain('tasksel');
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my $debconf_helper="/usr/lib/tasksel/tasksel-debconf";
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my $testdir="/usr/lib/tasksel/tests";
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my $packagesdir="/usr/lib/tasksel/packages";
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my $descdir="/usr/share/tasksel/descs";
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my $localdescdir="/usr/local/share/tasksel/descs";
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my $statusfile="/var/lib/dpkg/status";
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my $infodir="/usr/lib/tasksel/info";
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my $testmode=0;
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my $taskpackageprefix="task-";
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sub warning {
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print STDERR "tasksel: @_\n";
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}
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sub error {
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print STDERR "tasksel: @_\n";
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exit 1;
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}
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# Run a shell command except in test mode, and returns its exit code.
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# Prints the command in test mode. Parameters should be pre-split for
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# system.
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sub run {
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if ($testmode) {
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print join(" ", @_)."\n";
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return 0;
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}
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else {
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return system(@_) >> 8;
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}
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}
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# A list of all available task desc files.
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sub list_task_descs {
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if ($ENV{DEBIAN_TASKS_ONLY}) {
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return glob("$descdir/debian-tasks.desc");
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}
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else {
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return glob("$descdir/*.desc"), glob("$localdescdir/*.desc");
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}
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}
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# Returns a list of hashes; hash values are arrays for multi-line fields.
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sub read_task_desc {
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my $desc=shift;
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my %tasks;
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open (DESC, "<$desc") || die "read $desc\: $!";
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local $/="\n\n";
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while (<DESC>) {
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my %data;
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my @lines=split("\n");
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while (@lines) {
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my $line=shift(@lines);
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if ($line=~/^([^ ]+):(?: (.*))?/) {
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my ($key, $value)=($1, $2);
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$key=lc($key);
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if (@lines && $lines[0] =~ /^\s+/) {
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# multi-line field
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my @values;
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if (defined $value && length $value) {
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push @values, $value;
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}
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while (@lines && $lines[0] =~ /^\s+(.*)/) {
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push @values, $1;
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shift @lines;
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}
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$data{$key}=[@values];
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}
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else {
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$data{$key}=$value;
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}
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}
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else {
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warning "parse error in stanza $. of $desc";
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}
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}
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$data{relevance}=5 unless exists $data{relevance};
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if (exists $data{task}) {
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$tasks{$data{task}} = \%data;
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}
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}
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close DESC;
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my @ret;
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foreach my $task (keys %tasks) {
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my $t=$tasks{$task};
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if (exists $t->{parent} && exists $tasks{$t->{parent}}) {
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$t->{sortkey}=$tasks{$t->{parent}}->{relevance}.$t->{parent}."-0".$t->{relevance};
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}
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else {
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$t->{sortkey}=$t->{relevance}.$t->{task}."-00";
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}
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push @ret, $t;
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}
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return @ret;
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}
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# Loads info for all tasks, and returns a set of task structures.
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sub all_tasks {
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my %seen;
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grep { $seen{$_->{task}}++; $seen{$_->{task}} < 2 }
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map { read_task_desc($_) } list_task_descs();
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}
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sub _info_avail {
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my %ret = ();
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# Might be better to use the perl apt bindings, but they are not
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# currently in base.
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open (AVAIL, "apt-cache dumpavail|");
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local $_;
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my ($package, $section, $priority);
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while (<AVAIL>) {
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chomp;
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if (not $_) {
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if (defined $package && defined $priority && defined $section) {
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$ret{$package} = {
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"priority" => $priority,
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"section" => $section,
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};
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}
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}
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elsif (/^Package: (.*)/) {
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$package = $1;
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}
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elsif (/^Priority: (.*)/) {
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$priority = $1;
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}
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elsif (/^Section: (.*)/) {
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$section = $1;
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}
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}
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close AVAIL;
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return %ret;
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}
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# Returns a list of all installed packages.
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sub list_installed {
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my @list;
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open (LIST, q{LANG=C dpkg-query -W -f='${Package} ${Status}\n' |});
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while (<LIST>) {
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if (/^([^ ]+) .* installed$/m) {
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push @list, $1;
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}
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}
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close LIST;
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return @list;
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}
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my %_info_avail_cache;
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# Returns a hash of all available packages.
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sub info_avail {
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my $package = shift;
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if (!%_info_avail_cache) {
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%_info_avail_cache = _info_avail();
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}
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return \%_info_avail_cache;
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}
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# Given a package name, checks to see if it's available. Memoised.
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sub package_avail {
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my $package = shift;
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return info_avail()->{$package} || package_installed($package);
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}
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my %installed_pkgs;
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# Given a package name, checks to see if it's installed. Memoised.
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sub package_installed {
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my $package=shift;
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if (! %installed_pkgs) {
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foreach my $pkg (list_installed()) {
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$installed_pkgs{$pkg} = 1;
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}
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}
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return $installed_pkgs{$package};
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}
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# Given a task hash, checks if its key packages are available.
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sub task_avail {
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local $_;
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my $task=shift;
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if (! ref $task->{key}) {
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return 1;
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}
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else {
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foreach my $pkg (@{$task->{key}}) {
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if (! package_avail($pkg)) {
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return 0;
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}
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}
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return 1;
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}
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}
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# Given a task hash, checks to see if it is already installed.
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# (All of its key packages must be installed.)
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sub task_installed {
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local $_;
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my $task=shift;
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if (! ref $task->{key}) {
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return 0; # can't tell with no key packages
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}
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else {
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foreach my $pkg (@{$task->{key}}) {
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if (! package_installed($pkg)) {
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return 0;
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}
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}
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return 1;
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}
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}
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# Given task hash, returns a list of all available packages in the task.
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sub task_packages {
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my $task=shift;
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my %list;
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# key packages are always included
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if (ref $task->{key}) {
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map { $list{$_}=1 } @{$task->{key}};
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}
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if (! defined $task->{packages}) {
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# only key
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}
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elsif ($task->{packages} eq 'standard') {
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my %info_avail=%{info_avail()};
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while (my ($package, $info) = each(%info_avail)) {
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my ($priority, $section) = ($info->{priority}, $info->{section});
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if (($priority eq 'required' ||
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$priority eq 'important' ||
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$priority eq 'standard') &&
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# Exclude packages in non-main and library sections
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$section !~ /^lib|\// &&
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# Exclude already installed packages
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!package_installed($package)) {
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$list{$package} = 1;
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}
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}
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}
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else {
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# external method
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my ($method, @params);
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if (ref $task->{packages}) {
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@params=@{$task->{packages}};
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$method=shift @params;
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}
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else {
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$method=$task->{packages};
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}
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map { $list{$_}=1 }
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grep { package_avail($_) }
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split(' ', `$packagesdir/$method $task->{task} @params`);
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}
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return keys %list;
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}
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# Given a task hash, runs any test program specified in its data, and sets
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# the _display and _install fields to 1 or 0 depending on its result.
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sub task_test {
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my $task=shift;
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my $new_install=shift;
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$task->{_display} = shift; # default
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$task->{_install} = shift; # default
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$ENV{NEW_INSTALL}=$new_install if defined $new_install;
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foreach my $test (grep /^test-.*/, keys %$task) {
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$test=~s/^test-//;
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if (-x "$testdir/$test") {
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my $ret=system("$testdir/$test", $task->{task}, split " ", $task->{"test-$test"}) >> 8;
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if ($ret == 0) {
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$task->{_display} = 0;
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$task->{_install} = 1;
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}
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elsif ($ret == 1) {
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$task->{_display} = 0;
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$task->{_install} = 0;
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}
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elsif ($ret == 2) {
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$task->{_display} = 1;
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$task->{_install} = 1;
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}
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elsif ($ret == 3) {
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$task->{_display} = 1;
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$task->{_install} = 0;
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}
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}
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}
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delete $ENV{NEW_INSTALL};
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return $task;
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}
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# Hides a task and marks it not to be installed if it enhances other
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# tasks.
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sub hide_enhancing_tasks {
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my $task=shift;
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if (exists $task->{enhances} && length $task->{enhances}) {
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$task->{_display} = 0;
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$task->{_install} = 0;
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}
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return $task;
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}
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# Looks up the descriptions of a set of tasks, returning a new list
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# with the shortdesc fields filled in.
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sub getdescriptions {
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my @tasks=@_;
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# If the task has a description field in the task desc file,
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# just use it, looking up a translation in gettext.
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@tasks = map {
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if (defined $_->{description}) {
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$_->{shortdesc}=dgettext("debian-tasks", $_->{description}->[0]);
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}
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$_;
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} @tasks;
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# Otherwise, a more expensive apt-cache query is done,
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# to use the descriptions of task packages.
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my @todo = grep { ! defined $_->{shortdesc} } @tasks;
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if (@todo) {
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open(APT_CACHE, "apt-cache show ".join(" ", map { $taskpackageprefix.$_->{task} } @todo)." |") || die "apt-cache show: $!";
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local $/="\n\n";
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while (<APT_CACHE>) {
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my ($name)=/^Package: $taskpackageprefix(.*)$/m;
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my ($description)=/^Description-(?:[a-z][a-z](?:_[A-Z][A-Z])?): (.*)$/m;
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($description)=/^Description: (.*)$/m
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unless defined $description;
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if (defined $name && defined $description) {
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@tasks = map {
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if ($_->{task} eq $name) {
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$_->{shortdesc}=$description;
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}
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$_;
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} @tasks;
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}
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}
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close APT_CACHE;
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}
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return @tasks;
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}
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# Converts a list of tasks into a debconf list of the task short
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# descriptions.
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sub task_to_debconf {
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join ", ", map { format_description_for_debconf($_) } getdescriptions(@_);
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}
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sub format_description_for_debconf {
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my $task=shift;
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my $d=$task->{shortdesc};
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$d=~s/,/\\,/g;
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$d="... ".$d if exists $task->{parent};
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return $d;
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}
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# Converts a list of tasks into a debconf list of the task names.
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sub task_to_debconf_C {
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join ", ", map { $_->{task} } @_;
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}
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# Given a first parameter that is a string listing task names, and then a
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# list of task hashes, returns a list of hashes for all the tasks
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# in the list.
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sub list_to_tasks {
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my $list=shift;
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my %lookup = map { $_->{task} => $_ } @_;
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return grep { defined } map { $lookup{$_} } split /[, ]+/, $list;
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}
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# Orders a list of tasks for display.
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sub order_for_display {
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sort {
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$a->{sortkey} cmp $b->{sortkey}
|
||
|
|
|| 0 ||
|
||
|
|
$a->{task} cmp $b->{task}
|
||
|
|
} @_;
|
||
|
|
}
|
||
|
|
|
||
|
|
# Given a set of tasks and a name, returns the one with that name.
|
||
|
|
sub name_to_task {
|
||
|
|
my $name=shift;
|
||
|
|
return (grep { $_->{task} eq $name } @_)[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
sub task_script {
|
||
|
|
my $task=shift;
|
||
|
|
my $script=shift;
|
||
|
|
|
||
|
|
my $path="$infodir/$task.$script";
|
||
|
|
if (-e $path && -x _) {
|
||
|
|
my $ret=run($path);
|
||
|
|
if ($ret != 0) {
|
||
|
|
warning("$path exited with nonzero code $ret");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
sub usage {
|
||
|
|
print STDERR gettext(q{Usage:
|
||
|
|
tasksel install <task>...
|
||
|
|
tasksel remove <task>...
|
||
|
|
tasksel [options]
|
||
|
|
-t, --test test mode; don't really do anything
|
||
|
|
--new-install automatically install some tasks
|
||
|
|
--list-tasks list tasks that would be displayed and exit
|
||
|
|
--task-packages list available packages in a task
|
||
|
|
--task-desc returns the description of a task
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
# Process command line options and return them in a hash.
|
||
|
|
sub getopts {
|
||
|
|
my %ret;
|
||
|
|
Getopt::Long::Configure ("bundling");
|
||
|
|
if (! GetOptions(\%ret, "test|t", "new-install", "list-tasks",
|
||
|
|
"task-packages=s@", "task-desc=s",
|
||
|
|
"debconf-apt-progress=s")) {
|
||
|
|
usage();
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
# Special case apt-like syntax.
|
||
|
|
if (@ARGV) {
|
||
|
|
my $cmd = shift @ARGV;
|
||
|
|
if ($cmd eq "install") {
|
||
|
|
$ret{cmd_install} = \@ARGV;
|
||
|
|
}
|
||
|
|
elsif ($cmd eq "remove") {
|
||
|
|
$ret{cmd_remove} = \@ARGV;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
usage();
|
||
|
|
exit 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
$testmode=1 if $ret{test}; # set global
|
||
|
|
return %ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
sub interactive {
|
||
|
|
my $options = shift;
|
||
|
|
my @tasks = @_;
|
||
|
|
|
||
|
|
if (! $options->{"new-install"}) {
|
||
|
|
# Don't install hidden tasks if this is not a new install.
|
||
|
|
map { $_->{_install} = 0 } grep { $_->{_display} == 0 } @tasks;
|
||
|
|
}
|
||
|
|
|
||
|
|
my @list = order_for_display(grep { $_->{_display} == 1 } @tasks);
|
||
|
|
if (@list) {
|
||
|
|
if (! $options->{"new-install"}) {
|
||
|
|
# Find tasks that are already installed.
|
||
|
|
map { $_->{_installed} = task_installed($_) } @list;
|
||
|
|
# Don't install new tasks unless manually selected.
|
||
|
|
map { $_->{_install} = 0 } @list;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
# Assume that no tasks are installed, to ensure
|
||
|
|
# that complete tasks get installed on new
|
||
|
|
# installs.
|
||
|
|
map { $_->{_installed} = 0 } @list;
|
||
|
|
}
|
||
|
|
my $question="tasksel/tasks";
|
||
|
|
if ($options->{"new-install"}) {
|
||
|
|
$question="tasksel/first";
|
||
|
|
}
|
||
|
|
my @default = grep { $_->{_display} == 1 && ($_->{_install} == 1 || $_->{_installed} == 1) } @tasks;
|
||
|
|
my $tmpfile=`tempfile`;
|
||
|
|
chomp $tmpfile;
|
||
|
|
my $ret=system($debconf_helper, $tmpfile,
|
||
|
|
task_to_debconf_C(@list),
|
||
|
|
task_to_debconf(@list),
|
||
|
|
task_to_debconf_C(@default),
|
||
|
|
$question) >> 8;
|
||
|
|
if ($ret == 30) {
|
||
|
|
exit 10; # back up
|
||
|
|
}
|
||
|
|
elsif ($ret != 0) {
|
||
|
|
error "debconf failed to run";
|
||
|
|
}
|
||
|
|
open(IN, "<$tmpfile");
|
||
|
|
$ret=<IN>;
|
||
|
|
if (! defined $ret) {
|
||
|
|
die "tasksel canceled\n";
|
||
|
|
}
|
||
|
|
chomp $ret;
|
||
|
|
close IN;
|
||
|
|
unlink $tmpfile;
|
||
|
|
|
||
|
|
# Set _install flags based on user selection.
|
||
|
|
map { $_->{_install} = 0 } @list;
|
||
|
|
foreach my $task (list_to_tasks($ret, @tasks)) {
|
||
|
|
if (! $task->{_installed}) {
|
||
|
|
$task->{_install} = 1;
|
||
|
|
}
|
||
|
|
$task->{_selected} = 1;
|
||
|
|
}
|
||
|
|
foreach my $task (@list) {
|
||
|
|
if (! $task->{_selected} && $task->{_installed}) {
|
||
|
|
$task->{_remove} = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# If an enhancing task is already marked for
|
||
|
|
# install, probably by preseeding, mark the tasks
|
||
|
|
# it enhances for install.
|
||
|
|
foreach my $task (grep { $_->{_install} && exists $_->{enhances} &&
|
||
|
|
length $_->{enhances} } @tasks) {
|
||
|
|
map { $_->{_install}=1 } list_to_tasks($task->{enhances}, @tasks);
|
||
|
|
}
|
||
|
|
|
||
|
|
# Select enhancing tasks for install.
|
||
|
|
# XXX FIXME ugly hack -- loop until enhances settle to handle
|
||
|
|
# chained enhances. This is ugly and could loop forever if
|
||
|
|
# there's a cycle.
|
||
|
|
my $enhances_needswork=1;
|
||
|
|
my %tested;
|
||
|
|
while ($enhances_needswork) {
|
||
|
|
$enhances_needswork=0;
|
||
|
|
foreach my $task (grep { ! $_->{_install} && exists $_->{enhances} &&
|
||
|
|
length $_->{enhances} } @tasks) {
|
||
|
|
my %tasknames = map { $_->{task} => $_ } @tasks;
|
||
|
|
my @deps=map { $tasknames{$_} } split ", ", $task->{enhances};
|
||
|
|
|
||
|
|
if (grep { ! defined $_ } @deps) {
|
||
|
|
# task enhances an unavailable or
|
||
|
|
# uninstallable task
|
||
|
|
next;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (@deps) {
|
||
|
|
my $orig_state=$task->{_install};
|
||
|
|
|
||
|
|
# Mark enhancing tasks for install if their
|
||
|
|
# dependencies are met and their test fields
|
||
|
|
# mark them for install.
|
||
|
|
if (! exists $tested{$task->{task}}) {
|
||
|
|
$ENV{TESTING_ENHANCER}=1;
|
||
|
|
task_test($task, $options->{"new-install"}, 0, 1);
|
||
|
|
delete $ENV{TESTING_ENHANCER};
|
||
|
|
$tested{$task->{task}}=$task->{_install};
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
$task->{_install}=$tested{$task->{task}};
|
||
|
|
}
|
||
|
|
|
||
|
|
foreach my $dep (@deps) {
|
||
|
|
if (! $dep->{_install}) {
|
||
|
|
$task->{_install} = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($task->{_install} != $orig_state) {
|
||
|
|
$enhances_needswork=1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
sub main {
|
||
|
|
my %options=getopts();
|
||
|
|
my @tasks_remove;
|
||
|
|
my @tasks_install;
|
||
|
|
|
||
|
|
# Options that output stuff and don't need a full processed list of
|
||
|
|
# tasks.
|
||
|
|
if (exists $options{"task-packages"}) {
|
||
|
|
my @tasks=all_tasks();
|
||
|
|
foreach my $taskname (@{$options{"task-packages"}}) {
|
||
|
|
my $task=name_to_task($taskname, @tasks);
|
||
|
|
if ($task) {
|
||
|
|
print "$_\n" foreach task_packages($task);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
elsif ($options{"task-desc"}) {
|
||
|
|
my $task=name_to_task($options{"task-desc"}, all_tasks());
|
||
|
|
if ($task) {
|
||
|
|
my $extdesc=join(" ", @{$task->{description}}[1..$#{$task->{description}}]);
|
||
|
|
print dgettext("debian-tasks", $extdesc)."\n";
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# This is relatively expensive, get the full list of available tasks and
|
||
|
|
# mark them.
|
||
|
|
my @tasks=map { hide_enhancing_tasks($_) } map { task_test($_, $options{"new-install"}, 1, 0) }
|
||
|
|
grep { task_avail($_) } all_tasks();
|
||
|
|
|
||
|
|
if ($options{"list-tasks"}) {
|
||
|
|
map { $_->{_installed} = task_installed($_) } @tasks;
|
||
|
|
@tasks=getdescriptions(@tasks);
|
||
|
|
print "".($_->{_installed} ? "i" : "u")." ".$_->{task}."\t".$_->{shortdesc}."\n"
|
||
|
|
foreach order_for_display(grep { $_->{_display} } @tasks);
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($options{cmd_install}) {
|
||
|
|
@tasks_install = map { name_to_task($_, @tasks) } @{$options{cmd_install}};
|
||
|
|
}
|
||
|
|
elsif ($options{cmd_remove}) {
|
||
|
|
@tasks_remove = map { name_to_task($_, @tasks) } @{$options{cmd_remove}};
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
interactive(\%options, @tasks);
|
||
|
|
|
||
|
|
# Add tasks to install
|
||
|
|
@tasks_install = grep { $_->{_install} } @tasks;
|
||
|
|
# Add tasks to remove
|
||
|
|
@tasks_remove = grep { $_->{_remove} } @tasks;
|
||
|
|
}
|
||
|
|
|
||
|
|
my @cmd;
|
||
|
|
if (-x "/usr/bin/debconf-apt-progress") {
|
||
|
|
@cmd = "debconf-apt-progress";
|
||
|
|
push @cmd, split(' ', $options{'debconf-apt-progress'})
|
||
|
|
if exists $options{'debconf-apt-progress'};
|
||
|
|
push @cmd, "--";
|
||
|
|
}
|
||
|
|
push @cmd, qw{apt-get -q -y -o APT::Install-Recommends=true -o APT::Get::AutomaticRemove=true -o APT::Acquire::Retries=3 install};
|
||
|
|
|
||
|
|
# And finally, act on selected tasks.
|
||
|
|
if (@tasks_install || @tasks_remove) {
|
||
|
|
foreach my $task (@tasks_remove) {
|
||
|
|
push @cmd, map { "$_-" } task_packages($task);
|
||
|
|
task_script($task->{task}, "prerm");
|
||
|
|
}
|
||
|
|
foreach my $task (@tasks_install) {
|
||
|
|
push @cmd, task_packages($task);
|
||
|
|
task_script($task->{task}, "preinst");
|
||
|
|
}
|
||
|
|
my $ret=run(@cmd);
|
||
|
|
if ($ret != 0) {
|
||
|
|
error gettext("apt-get failed")." ($ret)";
|
||
|
|
}
|
||
|
|
foreach my $task (@tasks_remove) {
|
||
|
|
task_script($task->{task}, "postrm");
|
||
|
|
}
|
||
|
|
foreach my $task (@tasks_install) {
|
||
|
|
task_script($task->{task}, "postinst");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
main();
|