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package urpm::install; 

# $Id$

use urpm;
use urpm::msg;
use urpm::util;


# size of the installation progress bar
my $progress_size = 45;
eval {
    require Term::ReadKey;
    ($progress_size) = Term::ReadKey::GetTerminalSize();
    $progress_size -= 35;
    $progress_size < 5 and $progress_size = 5;
};


#- prepare transaction.
sub prepare_transaction {
    my ($_urpm, $set, $list, $sources, $transaction_list, $transaction_sources) = @_;

    foreach my $id (@{$set->{upgrade}}) {
	foreach (0..$#$list) {
	    exists $list->[$_]{$id} and $transaction_list->[$_]{$id} = $list->[$_]{$id};
	}
	exists $sources->{$id} and $transaction_sources->{$id} = $sources->{$id};
    }
}

sub build_transaction_set_ {
    my ($urpm, $state, %options) = @_;

    if ($urpm->{parallel_handler} || !$options{split_length} ||
	keys %{$state->{selected}} < $options{split_level}) {
	#- build simplest transaction (no split).
	$urpm->build_transaction_set(undef, $state, split_length => 0);
    } else {
	my $db;

	if ($options{rpmdb}) {
	    $db = new URPM;
	    $db->parse_synthesis($options{rpmdb});
	} else {
	    $db = urpm::db_open_or_die($urpm, $urpm->{root});
	}

	my $sig_handler = sub { undef $db; exit 3 };
	local $SIG{INT} = $sig_handler;
	local $SIG{QUIT} = $sig_handler;

	#- build transaction set...
	$urpm->build_transaction_set($db, $state, split_length => $options{split_length}, keep => $options{keep});
    }
}

sub transaction_set_to_string {
    my ($urpm, $set) = @_;

    my $format_list = sub { int(@_) . '=' . join(',', @_) };
    map {
	sprintf('remove=%s update=%s',
		$format_list->(@{$_->{remove} || []}),
		$format_list->(map { $urpm->{depslist}[$_]->name } @{$_->{upgrade} || []}));
    } @$set;
}

# install logger callback
sub install_logger {
    my ($urpm, $type, $id, $subtype, $amount, $total) = @_;
    my $pkg = defined $id && $urpm->{depslist}[$id];
    my $total_pkg = $urpm->{nb_install};
    local $| = 1;

    if ($subtype eq 'start') {
	$urpm->{logger_progress} = 0;
	if ($type eq 'trans') {
	    $urpm->{logger_id} ||= 0;
	    $urpm->{logger_count} ||= 0;
	    my $p = N("Preparing...");
	    print $p, " " x (33 - length $p);
	} else {
	    ++$urpm->{logger_id};
	    my $pname = $pkg ? $pkg->name : '';
	    ++$urpm->{logger_count} if $pname;
	    my $cnt = $pname ? $urpm->{logger_count} : '-';
	    $pname ||= N("[repackaging]");
	    my $s = sprintf("%9s: %-22s", $cnt . "/" . $total_pkg, $pname);
	    print $s;
	    $s =~ / $/ or printf "\n%9s  %-22s", '', '';
	}
    } elsif ($subtype eq 'stop') {
	if ($urpm->{logger_progress} < $progress_size) {
	    print '#' x ($progress_size - $urpm->{logger_progress}), "\n";
	    $urpm->{logger_progress} = 0;
	}
    } elsif ($subtype eq 'progress') {
	my $new_progress = $total > 0 ? int($progress_size * $amount / $total) : $progress_size;
	if ($new_progress > $urpm->{logger_progress}) {
	    print '#' x ($new_progress - $urpm->{logger_progress});
	    $urpm->{logger_progress} = $new_progress;
	    $urpm->{logger_progress} == $progress_size and print "\n";
	}
    }
}

sub get_README_files {
    my ($urpm, $trans, $pkg) = @_;

    foreach my $file ($pkg->files) { 
	my ($kind) = $file =~ m!/README([^/]*)\.urpmi$! or next;
	my $valid;
	if ($kind eq '') {
	    $valid = 1;
	} elsif ($kind eq '.install' && !$pkg->flag_installed) {
	    $valid = 1;
	} elsif ($kind =~ /(.*)\.(upgrade|update)$/ && $pkg->flag_installed) {
	    if (!$1) {
		$valid = 1;
	    } else {
		my $version = $1;
		foreach my $i (0 .. $trans->NElements - 1) {
		    $trans->Element_name($i) eq $pkg->name or next;

		    my $vr = $trans->Element_version($i) . '-' . $trans->Element_release($i);
		    if (URPM::ranges_overlap("== $vr", "< $version")) {
			$valid = 1;
			last;
		    }
		}
	    }
	}
	$valid and $urpm->{readmes}{$file} = $pkg->fullname;
    }
}

#- install packages according to each hash (remove, install or upgrade).
#- options: 
#-      test, excludepath, nodeps, noorder (unused), delta, 
#-      callback_inst, callback_trans, callback_report_uninst,
#-      post_clean_cache, verbose
#-   (more options for trans->run)
#-      excludedocs, nosize, noscripts, oldpackage, repackage, replacepkgs, justdb, ignorearch
sub install {
    my ($urpm, $remove, $install, $upgrade, %options) = @_;
    $options{translate_message} = 1;

    my $db = urpm::db_open_or_die($urpm, $urpm->{root}, !$options{test}); #- open in read/write mode unless testing installation.

    my $trans = $db->create_transaction($urpm->{root});
    if ($trans) {
	sys_log("transaction on %s (remove=%d, install=%d, upgrade=%d)", $urpm->{root} || '/', scalar(@{$remove || []}), scalar(values %$install), scalar(values %$upgrade));
	$urpm->{log}(N("created transaction for installing on %s (remove=%d, install=%d, upgrade=%d)", $urpm->{root} || '/',
		       scalar(@{$remove || []}), scalar(values %$install), scalar(values %$upgrade)));
    } else {
	return N("unable to create transaction");
    }

    my ($update, @l) = 0;
    my @produced_deltas;

    foreach (@$remove) {
	if ($trans->remove($_)) {
	    $urpm->{debug} and $urpm->{debug}("trans: scheduling removal of $_");
	} else {
	    $urpm->{error}("unable to remove package " . $_);
	}
    }
    my @trans_pkgs;
    foreach my $mode ($install, $upgrade) {
	foreach (keys %$mode) {
	    my $pkg = $urpm->{depslist}[$_];
	    $pkg->update_header($mode->{$_}, keep_all_tags => 1);
	    if ($pkg->payload_format eq 'drpm') { #- handle deltarpms
		my $true_rpm = urpm::sys::apply_delta_rpm($mode->{$_}, "$urpm->{cachedir}/rpms", $pkg);
		if ($true_rpm) {
		    push @produced_deltas, ($mode->{$_} = $true_rpm); #- fix path
		} else {
		    $urpm->{error}(N("unable to extract rpm from delta-rpm package %s", $mode->{$_}));
		}
	    }
	    if ($trans->add($pkg, update => $update,
		    $options{excludepath} ? (excludepath => [ split /,/, $options{excludepath} ]) : ()
	    )) {
		$urpm->{debug} and $urpm->{debug}(
		    sprintf('trans: scheduling %s of %s (id=%d, file=%s)', 
		      $update ? 'update' : 'install', 
		      scalar($pkg->fullname), $_, $mode->{$_}));
		push @trans_pkgs, $pkg;

	    } else {
		$urpm->{error}(N("unable to install package %s", $mode->{$_}));
		my $cachefile = "$urpm->{cachedir}/rpms/" . $pkg->filename;
		if (-e $cachefile) {
		    $urpm->{error}(N("removing bad rpm (%s) from %s", $pkg->name, "$urpm->{cachedir}/rpms"));
		    unlink $cachefile or $urpm->{fatal}(1, N("removing %s failed: %s", $cachefile, $!));
		}
	    }
	}
	++$update;
    }
    if (!$options{nodeps} && (@l = $trans->check(%options))) {
    } elsif (!$options{noorder} && (@l = $trans->order)) {
    } else {
	$urpm->{readmes} = {};
	my $index;
	my $fh;
	#- assume default value for some parameter.
	$options{delta} ||= 1000;
	$options{callback_open} = sub {
	    my ($_data, $_type, $id) = @_;
	    $index++;
	    $fh = urpm::sys::open_safe($urpm, '<', $install->{$id} || $upgrade->{$id});
	    $fh ? fileno $fh : undef;
	};
	$options{callback_close} = sub {
	    my ($urpm, undef, $pkgid) = @_;
	    return unless defined $pkgid;
	    get_README_files($urpm, $trans, $urpm->{depslist}[$pkgid]);
	    close $fh if defined $fh;
	};
	#- ensure perl does not create a circular reference below, otherwise all this won't be collected, and rpmdb won't be closed
	my ($verbose, $callback_report_uninst) = ($options{verbose}, $options{callback_report_uninst});
	$options{callback_uninst} = sub { 	    
	    my ($_urpm, undef, undef, $subtype) = @_;
	    if ($subtype eq 'start') {
		my ($name, $fullname) = ($trans->Element_name($index), $trans->Element_fullname($index));
		my @previous = map { $trans->Element_name($_) } 0 .. ($index - 1);
		# looking at previous packages in transaction
		# we should be looking only at installed packages, but it should not give a different result
		if (member($name, @previous)) {
		    $urpm->{log}("removing upgraded package $fullname");
		} else {
		    $callback_report_uninst and $callback_report_uninst->(N("Removing package %s", $fullname));
		    print N("removing package %s", $fullname), "\n" if $verbose >= 0;
		}
		$index++;
	    }
	};
	if ($options{verbose} >= 0 && @trans_pkgs) {
	    $options{callback_inst}  ||= \&install_logger;
	    $options{callback_trans} ||= \&install_logger;
	}
	@l = $trans->run($urpm, %options);

	#- don't clear cache if transaction failed. We might want to retry.
	if (@l == 0 && !$options{test} && $options{post_clean_cache}) {
	    #- examine the local cache to delete packages which were part of this transaction
	    my $cachedir = "$urpm->{cachedir}/rpms";
	    my @pkgs = grep { -e "$cachedir/$_" } map { $_->filename } @trans_pkgs;
	    $urpm->{log}(N("removing installed rpms (%s) from %s", join(' ', @pkgs), $cachedir));
	    foreach (@pkgs) {
		unlink "$cachedir/$_" or $urpm->{fatal}(1, N("removing %s failed: %s", $_, $!));
	    }
	}

	if ($options{verbose} >= 0) {
	    foreach (keys %{$urpm->{readmes}}) {
		print "-" x 70, "\n", N("More information on package %s", $urpm->{readmes}{$_}), "\n";
		print cat_(($urpm->{root} || '') . $_);
		print "-" x 70, "\n";
	    }
	}
    }
    unlink @produced_deltas;

    if ($urpm->{root} && !$options{test} || $urpm->{tune_rpm}{private}) {
	$urpm->{root} && $urpm->{debug} and $urpm->{debug}("workaround bug in rpmlib by removing /var/lib/rpm/__db*");
	urpm::sys::clean_rpmdb_shared_regions($urpm->{root});	
    }

    @l;
}

1;