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#!/usr/bin/perl

# $Id$

#- Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005 MandrakeSoft SA
#- Copyright (C) 2005, 2006 Mandriva SA
#
# 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.

use strict;
use urpm;
use urpm::args;
use urpm::msg;
use urpm::install;
use urpm::media;
use urpm::select;
use urpm::orphans;


$ENV{PATH} = "/sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin";
delete @ENV{qw(ENV BASH_ENV IFS CDPATH)};

our ($test, $parallel, $force);
my $yesexpr =
  #-PO: Add here the keys which might be pressed in the "Yes"-case.
  N("Yy");

sub usage() {
    print N("urpme version %s
Copyright (C) 1999-2008 Mandriva.
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("  --auto-orphans - remove orphans
") . N("  --test         - verify if the removal can be achieved correctly.
") . N("  --force        - force invocation even if some packages do not exist.
") . N("  --parallel     - distributed urpmi across machines of alias.
") . N("  --repackage    - Re-package the files before erasing
") . N("  --root         - use another root for rpm removal.
") . N("  --urpmi-root   - use another root for urpmi db & rpm installation.
") . N("  --noscripts    - do not execute package scriptlet(s).
") . N("  --use-distrib  - configure urpme on the fly from a distrib tree, useful
                   to (un)install a chroot with --root option.
") . N("  --verbose, -v  - verbose mode.
") . N("  -a             - select all packages matching expression.
");
    exit(1);
}

my @origARGV = @ARGV;
my $urpm = urpm->new_parse_cmdline or exit(1);
my @cmdline_pkgs_to_remove = @ARGV;
@cmdline_pkgs_to_remove || $options{matches} || $options{auto_orphans} or usage();

my $state = {};

if ($< && !$test) {
    $urpm->{fatal}(1, N("Only superuser is allowed to remove packages"));
}

#- rurpme checks
if ($options{restricted}) {
    urpm::error_restricted($urpm) if $urpm->{root} || $options{usedistrib} || $urpm->{options}{noscripts} || $parallel;
}

unless ($test) {
    sys_log("called with: @origARGV");
}

#- just configure parallel mode if available.
my $_urpmi_lock = urpm::lock::urpmi_db($urpm, '', wait => $options{wait_lock});
urpm::media::configure($urpm,
    synthesis => ($parallel ? 'none' : ''),
    parallel => $parallel,
    probe_with => $options{probe_with},
    usedistrib => $options{usedistrib},
);

#- examine packages...
my @toremove;
if (@cmdline_pkgs_to_remove || $options{matches}) {
    @toremove = urpm::select::find_packages_to_remove(
	$urpm,
	$state,
	\@cmdline_pkgs_to_remove,
	matches => $options{matches},
	force => $force,
	callback_notfound => sub {
	    my $urpm = shift @_;
	    #- Warning : the following message is parsed in urpm::parallel_*
	    $urpm->{fatal}(1, (@_ > 1 ? N("unknown packages") : N("unknown package")) .
			     ': ' . join(', ', @_)); 
	    0;
	},
	callback_fuzzy => sub {
	    my $urpm = shift @_;
	    my $match = shift @_;
	    my $pkgs = $urpm::msg::no_translation ? join(' ', @_) : join('', map { "\n$_" } sort @_);
	    #- Warning : the following message is parsed in urpm::parallel_*
	    $urpm->{fatal}(1, N("The following packages contain %s: %s", $match, $pkgs)); 
	    0;
	},
	callback_base => sub {
	    my ($urpm, @l) = @_;
	    $urpm->{fatal}(1, P("Removing the following package will break your system:",
				"Removing the following packages will break your system:", int(@l))
			     . "\n" . add_leading_spaces(urpm::select::translate_why_removed($urpm, $state, @l)));
	    0;
	},
    ) or $urpm->{fatal}(0, N("Nothing to remove"));
}

my $may_be_orphans = 1;
if (@toremove && !$urpm->{options}{auto}) {
    urpm::orphans::unrequested_orphans_after_remove($urpm, \@toremove)
	or $may_be_orphans = 0;
}

my @toremove_no_orphans = @toremove;
my @orphans;
if ($options{auto_orphans} && $may_be_orphans) {
    urpm::orphans::compute_future_unrequested_orphans($urpm, $state);
    @orphans = map { scalar $_->fullname } @{$state->{orphans_to_remove}};

    push @toremove, @orphans;
    if (!@toremove) {
	print N("No orphans to remove"), "\n";
	exit 0;
    }
}

my $msg = 
  P("To satisfy dependencies, the following package will be removed",
    "To satisfy dependencies, the following %d packages will be removed",
    scalar(@toremove), scalar(@toremove))
  . sprintf(" (%s)", formatXiB(-$urpm->selected_size($state))) . ":\n"
  . add_leading_spaces(urpm::select::translate_why_removed($urpm, $state, @toremove_no_orphans)) . "\n"
  . (@orphans ? P("(orphan package)", "(orphan packages)", scalar(@orphans)) . "\n" .
                add_leading_spaces(join("\n", @orphans) . "\n") : ());

if ($urpm->{options}{auto}) {
    $test and print STDOUT $msg;
} elsif ($parallel || @toremove > @cmdline_pkgs_to_remove) {
    print STDOUT $msg;
    $force || message_input_(P("Remove %d package?", "Remove %d packages?", scalar(@toremove), scalar(@toremove)) . N(" (y/N) "), boolean => 1) =~ /[$yesexpr]/ or exit 0;
}

#- Warning : the following message is parsed in urpm::parallel_*
print $test ? 
  N("testing removal of %s", join(' ', sort @toremove)) :
  N("removing %s", join(' ', sort @toremove)), "\n";

my %remove_options = (
    test => $test,
    force => $force,
    urpm::install::options($urpm),
);
my @errors = $parallel
    ? urpm::parallel::remove($urpm, \@toremove, %remove_options)
    : urpm::install::install($urpm, \@toremove, {}, {}, %remove_options);

if (@errors) {
    #- Warning : the following message is parsed in urpm::parallel_*
    $urpm->{fatal}(2, N("Removal failed") . ":\n" . join("\n",  map { "\t$_" } @errors));
} elsif ($may_be_orphans && !$options{auto_orphans} && !$test) {
    if (my $msg = urpm::orphans::get_now_orphans_msg($urpm)) {
	print "\n", $msg;
    }
}

sub add_leading_spaces {
    my ($s) = @_;
    $s =~ s/^/  /gm;
    $s;
}