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#!/usr/bin/perl

#- Copyright (C) 2002 MandrakeSoft (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.

#use strict qw(subs vars refs);
use urpm;

#- get I18N translation method.
import urpm _;

sub usage {
    print STDERR _("urpmf version %s
Copyright (C) 2002 MandrakeSoft.
This is free software and may be redistributed under the terms of the GNU GPL.

usage:
", $urpm::VERSION) . _("  --help         - print this help message.
") . _("  --update       - use only update media.
") . _("  --media        - use only the media listed by comma.
") . _("  --synthesis    - use the synthesis given instead of urpmi db.
") . _("  --verbose      - verbose mode.
") . _("  --quiet        - do not print tag name (default if no tag given on command
                   line, incompatible with interactive mode).
") . _("  --all          - print all tags.
") . _("  --name         - print tag name: rpm filename (assumed if no tag given on
                   command line but without package name).
") . _("  --group        - print tag group: group.
") . _("  --size         - print tag size: size.
") . _("  --epoch        - print tag epoch: epoch.
") . _("  --summary      - print tag summary: summary.
") . _("  --description  - print tag description: description.
") . _("  --provides     - print tag provides: all provides (multiple lines).
") . _("  --requires     - print tag requires: all requires (multiple lines).
") . _("  --files        - print tag files: all files (multiple lines).
") . _("  --conflicts    - print tag conflicts: all conflicts (multiple lines).
") . _("  --obsoletes    - print tag obsoletes: all obsoletes (multiple lines).
") . _("  --prereqs      - print tag prereqs: all prereqs (multiple lines).
") . _("  -f             - print version, release and arch with name.
") . _("  -e             - include perl code directly as perl -e.
") . _("  -a             - binary AND operator, true if both expression are true.
") . _("  -o             - binary OR operator, true if one expression is true.
") . _("  !              - unary NOT, true if expression is false.
") . _("  (              - left parenthesis to open group expression.
") . _("  )              - right parenthesis to close group expression.
");
    exit(0);
}

#- default options.
my $update = 0;
my $media = '';
my $synthesis = '';
my $verbose = 0;
my $quiet = undef;
my $fullname = '';
my %params;

#- parse arguments list.
my $expr;
my @nextargv;
while (defined($_ = shift @ARGV)) {
    /^--help$/ and do { usage; next };
    /^--no-locales$/ and do { undef *_; undef *urpm::_; *_ = *urpm::_ = sub { sprintf(shift @_, @_) }; next };
    /^--update$/ and do { $update = 1; next };
    /^--media$/ and do { push @nextargv, \$media; next };
    /^--mediums$/ and do { push @nextargv, \$media; next };
    /^--synthesis$/ and do { push @nextargv, \$synthesis; next };
    /^--verbose$/ and do { $verbose = 1; next };
    /^--quiet$/ and do { $quiet = 1; next };
    /^--all$/ and do { $params{$_} = 1
			 foreach qw(group size summary description provides requires files conflicts obsoletes prereqs); next };
    /^--(group|size|epoch|summary|description|provides|requires|files|conflicts|obsoletes|prereqs)$/ and
      do { $params{$1} = 1; next };
    /^-f$/ and do { $full = 'full'; next };
    /^-e$/ and do { $expr .= '('.$_.')'; next };
    /^-a$/ and do { $expr .= ' && '; next };
    /^-o$/ and do { $expr .= ' || '; next };
    /^[!\(\)]$/ and do { $expr .= $_; next };
    #- assume a regex directly
    $expr .= 'm{'.$_.'}';
}

my $urpm = new urpm;
$verbose or $urpm->{log} = sub {};

for (scalar(keys %params)) {
    $_ eq 0 and do { defined $quiet or $quiet = 1; $params{files} = 1 };
    $_ eq 1 and do { defined $quiet or $quiet = 1 };
    $_ > 1 and do { defined $quiet or $quiet = 0 };
}

#- build callback according expression.
my $callback = 'sub { my ($urpm, $pkg) = @_; '; #- it is a good start for a sub, no ;-)
foreach (qw(group size epoch summary description provides requires files conflicts obsoletes prereqs)) {
    $params{$_} and $callback .= 'foreach my $e ($pkg->'.$_.') { local $_ = $pkg->'.$full.'name."'.(!$quiet && ":$_").':$e"; '.$expr.' or next; print "$_\n" }';
}
$callback .= ' 1; }';
$callback = eval $callback;
$@ and die;

$urpm->configure(nocheck_access => 1,
		 media => $media,
		 synthesis => $synthesis,
		 update => $update,
		 callback => $callback,
		);

#- that'all! all has been done by callback above.