1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# Contributor(s): Frédéric Buclin <LpSolit@gmail.com>
package Bugzilla::Update;
use strict;
use Bugzilla::Config qw($datadir);
use constant REMOTE_FILE => 'http://updates.bugzilla.org/bugzilla-update.xml';
use constant LOCAL_FILE => "/bugzilla-update.xml"; # Relative to $datadir.
use constant TIME_INTERVAL => 604800; # Default is one week, in seconds.
use constant TIMEOUT => 5; # Number of seconds before timeout.
# Look for new releases and notify logged in administrators about them.
sub get_notifications {
return if (Bugzilla->params->{'upgrade_notification'} eq 'disabled');
# If the XML::Twig module is missing, we won't be able to parse
# the XML file. So there is no need to go further.
eval("require XML::Twig");
return if $@;
my $local_file = $datadir . LOCAL_FILE;
# Update the local XML file if this one doesn't exist or if
# the last modification time (stat[9]) is older than TIME_INTERVAL.
if (!-e $local_file || (time() - (stat($local_file))[9] > TIME_INTERVAL)) {
# Are we sure we didn't try to refresh this file already
# but we failed because we cannot modify its timestamp?
my $can_alter = 1;
if (-e $local_file) {
# Try to alter its last modification time.
$can_alter = utime(undef, undef, $local_file);
}
if ($can_alter) {
_synchronize_data();
}
else {
return {'error' => 'no_update', 'xml_file' => $local_file};
}
}
# If we cannot access the local XML file, ignore it.
return {'error' => 'no_access', 'xml_file' => $local_file} unless (-r $local_file);
my $twig = XML::Twig->new();
$twig->safe_parsefile($local_file);
# If the XML file is invalid, return.
return {'error' => 'corrupted', 'xml_file' => $local_file} if $@;
my $root = $twig->root;
my @releases;
foreach my $branch ($root->children('branch')) {
my $release = {
'branch_ver' => $branch->{'att'}->{'id'},
'latest_ver' => $branch->{'att'}->{'vid'},
'status' => $branch->{'att'}->{'status'},
'url' => $branch->{'att'}->{'url'},
'date' => $branch->{'att'}->{'date'}
};
push(@releases, $release);
}
# On which branch is the current installation running?
my @current_version =
($Bugzilla::Config::VERSION =~ m/^(\d+)\.(\d+)(?:(rc|\.)(\d+))?\+?$/);
my @release;
if (Bugzilla->params->{'upgrade_notification'} eq 'development_snapshot') {
@release = grep {$_->{'status'} eq 'development'} @releases;
}
elsif (Bugzilla->params->{'upgrade_notification'} eq 'latest_stable_release') {
@release = grep {$_->{'status'} eq 'stable'} @releases;
}
elsif (Bugzilla->params->{'upgrade_notification'} eq 'stable_branch_release') {
# We want the latest stable version for the current branch.
# If we are running a development snapshot, we won't match anything.
my $branch_version = $current_version[0] . '.' . $current_version[1];
# We do a string comparison instead of a numerical one, because
# e.g. 2.2 == 2.20, but 2.2 ne 2.20 (and 2.2 is indeed much older).
@release = grep {$_->{'branch_ver'} eq $branch_version} @releases;
# If the branch is now closed, we should strongly suggest
# to upgrade to the latest stable release available.
if (scalar(@release) && $release[0]->{'status'} eq 'closed') {
@release = grep {$_->{'status'} eq 'stable'} @releases;
return {'data' => $release[0], 'deprecated' => $branch_version};
}
}
else {
# Unknown parameter.
return {'error' => 'unknown_parameter'};
}
# Return if no new release is available.
return unless scalar(@release);
# Only notify the administrator if the latest version available
# is newer than the current one.
my @new_version =
($release[0]->{'latest_ver'} =~ m/^(\d+)\.(\d+)(?:(rc|\.)(\d+))?\+?$/);
# We convert release candidates 'rc' to integers (rc ? 0 : 1) in order
# to compare versions easily.
$current_version[2] = ($current_version[2] && $current_version[2] eq 'rc') ? 0 : 1;
$new_version[2] = ($new_version[2] && $new_version[2] eq 'rc') ? 0 : 1;
my $is_newer = _compare_versions(\@current_version, \@new_version);
return ($is_newer == 1) ? {'data' => $release[0]} : undef;
}
sub _synchronize_data {
eval("require LWP::UserAgent");
return if $@;
my $local_file = $datadir . LOCAL_FILE;
my $ua = LWP::UserAgent->new();
$ua->timeout(TIMEOUT);
$ua->protocols_allowed(['http', 'https']);
$ua->mirror(REMOTE_FILE, $local_file);
# $ua->mirror() forces the modification time of the local XML file
# to match the modification time of the remote one.
# So we have to update it manually to reflect that a newer version
# of the file has effectively been requested. This will avoid
# any new download for the next TIME_INTERVAL.
utime(undef, undef, $local_file);
}
sub _compare_versions {
my ($old_ver, $new_ver) = @_;
while (scalar(@$old_ver) && scalar(@$new_ver)) {
my $old = shift(@$old_ver);
my $new = shift(@$new_ver);
return $new <=> $old if ($new <=> $old);
}
return scalar(@$new_ver) <=> scalar(@$old_ver);
}
1;
__END__
=head1 NAME
Bugzilla::Update - Update routines for Bugzilla
=head1 SYNOPSIS
use Bugzilla::Update;
# Get information about new releases
my $new_release = Bugzilla::Update::get_notifications();
=head1 DESCRIPTION
This module contains all required routines to notify you
about new releases. It downloads an XML file from bugzilla.org
and parses it, in order to display information based on your
preferences. Absolutely no information about the Bugzilla version
you are running is sent to bugzilla.org.
=head1 FUNCTIONS
=over
=item C<get_notifications()>
Description: This function informs you about new releases, if any.
Params: None.
Returns: On success, a reference to a hash with data about
new releases, if any.
On failure, a reference to a hash with the reason
of the failure and the name of the unusable XML file.
=back
=cut
|
