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#!/usr/bin/perl

# $Id$

# Copyright (C) 1999,2002 MandrakeSoft <pixel@linux-mandrake.com>
#                                      <fpons@mandrakesoft.com>
#
# 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, 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#We only make good software ;-)
#use strict qw(subs vars refs);
use strict;
use urpm;

my (@nextargv, $root, $test, $parallel, $auto, $matches, $verbose, $maymatch, $usedistrib, $force, $bug, @l);
my $askok = N("Is this OK?");
# Translator: Add here the keys which might be pressed in the "No"-case.
my $noexpr = N("Nn");
# Translator: Add here the keys which might be pressed in the "Yes"-case.
my $yesexpr = N("Yy");

sub usage {
    print STDERR N("urpme version %s
Copyright (C) 1999, 2000, 2001, 2002 MandrakeSoft.
This is free software and may be redistributed under the terms of the GNU GPL.

usage:
", $urpm::VERSION) . N("  --help         - print this help message.
") . N("  --auto         - automatically select a package in choices.
") . N("  --test         - verify if the installation can be achieved correctly.
") . N("  --force        - force invocation even if some packages do not exist.
") . N("  --parallel     - distributed urpmi accross machines of alias.
") . N("  --root         - use another root for rpm installation.
") . N("  --use-distrib  - configure urpmi on the fly from a distrib tree, useful
                   to (un)install a chroot with --root option.
") . N("  -v             - verbose mode.
") . N("  -a             - select all packages matching expression.
");
    exit(0);
}

@ARGV or usage;
while (defined($_ = shift @ARGV)) {
    /^--help$/ and do { usage; next };
    /^--no-locales$/ and do { undef *N; undef *urpm::N; *N = *urpm::N = sub { sprintf(shift @_, @_) }; next };
    /^--?auto$/ and do { $auto = 1; next };
    /^--(no-)?test$/ and do { $test = !$1; next };
    /^--force$/ and do { $force = 1; next };
    /^--root$/ and do { push @nextargv, \$root; next };
    /^--use-distrib$/ and do { push @nextargv, \$usedistrib; next };
    /^--parallel$/ and do { push @nextargv, \$parallel; next };
    /^-(.*)$/ and do { foreach (split //, $1) {
	/[\?h]/ and do { usage; next };
	/a/ and do { $matches = 1; next };
	/v/ and do { $verbose = 1; next };
	die N("urpme: unknown option \"-%s\", check usage with --help\n", $1) } next };
    @nextargv and do { my $r = shift @nextargv; $r and $$r = $_; next };
    push @l, $_;
}

my $urpm = new urpm;
my $state = {};

#- remove verbose if not asked.
$verbose or $urpm->{log} = sub {};

#- just configure parallel mode if available.
$urpm->configure(synthesis => ($parallel and 'none'),
		 root => $root,
		 parallel => $parallel,
		 usedistrib => $usedistrib,
		 );

#- examine packages...
my @toremove = $urpm->find_packages_to_remove($state, \@l,
					      test => $test, matches => $matches, auto => $auto, force => $force,
					      callback_notfound => sub {
						  my $urpm = shift @_;
						  $urpm->{fatal}(1, (@_ > 1 ? N("unknown packages") : N("unknown package")) .
								 ': ' . join(', ', @_)); 0 },
					      callback_fuzzy => sub {
						  my $urpm = shift @_;
						  my $match = shift @_;
						  $urpm->{fatal}(1, N("The following packages contain %s: %s",
								      $match, join(' ', @_))); 0 },
					      callback_base => sub {
						  my $urpm = shift @_;
						  foreach (@_) {
						      $urpm->{error}(N("removing package %s will break your system", $_));
						  } 0 },
					     ) or $urpm->{fatal}(0, N("Nothing to remove"));

my $list = join "\n", $urpm->translate_why_removed($state, sort @toremove);
if ($test && $auto) {
    my $msg = N("Checking to remove the following packages");
    print STDOUT "$msg:\n$list\n";
} elsif (($parallel || @toremove > @l) && !$auto) {
    my $sum = 0;
    foreach (@toremove) {
	$sum += $state->{rejected}{$_}{size};
    }
    my $msg = N("To satisfy dependencies, the following packages will be removed (%d MB)", toMb($sum));
    print STDOUT "$msg:\n$list\n";
    message_input($askok . N(" (y/N) "), $force && $yesexpr, boolean => 1) =~ /[$yesexpr]/ or exit 0;
}

print STDOUT "\n".N("removing %s", join(' ', sort @toremove))."\n";
@l = $parallel ?
  $urpm->parallel_remove(\@toremove, test => $test, force => $force, translate_message => 1) :
  $urpm->install(\@toremove, {}, {}, test => $test, force => $force, translate_message => 1);
@l and $urpm->{fatal}(2, N("Removing failed") . ":\n" . join("\n",  map { "\t$_" } @l));

sub toMb {
    my $nb = $_[0] / 1024 / 1024;
    int $nb + 0.5;
}

sub message_input {
    my ($msg, $default_input, %options) = @_;
    my $input;
    my $noexpr = N("Nn");
    my $yesexpr = N("Yy");

    while (1) {
	print STDOUT $msg;
	if ($default_input) {
	    $bug and log_it($input);
	    return $default_input;
	}
	$input = <STDIN>;
	defined $input or return undef;
	$bug and log_it($input);
	if ($options{boolean}) {
	    $input =~ /^[$noexpr$yesexpr]*$/ and last;
	} elsif ($options{range}) {
	    1 <= $input && $input <= $options{range} and last;
	} else {
	    last;
	}
	print STDOUT N("Sorry, bad choice, try again\n")."\n";
    }
    return $input;
}