summaryrefslogtreecommitdiffstats
path: root/Bugzilla/Install/Requirements.pm
blob: ea3d81eb918526d9b57eb395853d78a240ed87ec (plain)
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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
# -*- 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): Max Kanat-Alexander <mkanat@bugzilla.org>
#                 Marc Schumann <wurblzap@gmail.com>

package Bugzilla::Install::Requirements;

# NOTE: This package MUST NOT "use" any Bugzilla modules other than
# Bugzilla::Constants, anywhere. We may "use" standard perl modules.
#
# Subroutines may "require" and "import" from modules, but they
# MUST NOT "use."

use strict;

use base qw(Exporter);
our @EXPORT = qw(
    REQUIRED_MODULES
    OPTIONAL_MODULES
    MOD_PERL_MODULES

    check_requirements
    check_graphviz
    have_vers
    vers_cmp
    install_command
);

use Bugzilla::Constants;
use constant REQUIRED_MODULES => [
    {
        name => 'CGI',
        version => '2.93'
    },
    {
        name => 'Date::Format',
        version => '2.21'
    },
    {
        name => 'DBI',
        version => '1.41'
    },
    {
        name => 'File::Spec',
        version => '0.84'
    },
    {
        name => 'Template',
        version => '2.10'
    },
    {
        name => 'Mail::Mailer',
        version => '1.67'
    },
    {
        name => 'MIME::Base64',
        version => '3.01'
    },
    {
        # MIME::Parser is packaged as MIME::Tools on ActiveState Perl
        name => $^O =~ /MSWin32/i ? 'MIME::Tools' : 'MIME::Parser',
        version => '5.406'
    },
];

use constant OPTIONAL_MODULES => [
    {
        name => 'GD',
        version => '1.20'
    },
    {
        # This module tells us whether or not Template-GD is installed
        # on Template-Toolkits after 2.14, and still works with 2.14 and lower.
        name => 'Template::Plugin::GD::Image',
        version => 0
    },
    {
        name => 'Chart::Base',
        version => '1.0'
    },
    {
        name => 'GD::Graph',
        version => 0
    },
    { 
        name => 'GD::Text::Align',
        version => 0
    },
    {
        name => 'XML::Twig',
        version => 0
    },
    {
        name => 'LWP::UserAgent',
        version => 0
    },
    {
        name => 'PatchReader',
        version => '0.9.4'
    },
    {
        name => 'Image::Magick',
        version => 0
    },
    {
        name => 'Net::LDAP',
        version => 0
    },
    {
        name => 'SOAP::Lite',
        version => 0
    },
];

# These are only required if you want to use Bugzilla with
# mod_perl.
use constant MOD_PERL_MODULES => [
    {
        name => 'mod_perl2', 
        version => '1.999022'
    },
    # Even very new releases of perl (5.8.5) don't come with this version,
    # so I didn't want to make it a general requirement just for
    # running under mod_cgi.
    {
        name => 'CGI',
        version => '3.11'
    },
    {
        name => 'Apache::DBI',
        version => '0.96'
    },
];

# Remember that you only have to add modules to this hash if their
# names are significantly different on ActiveState than on normal perl.
# If it's just a difference between "::" and "-" in the name, don't worry
# about it--install_command() handles that automatically.
use constant WIN32_MODULE_NAMES => {
    'Chart::Base'       => 'Chart',
    'Date::Format'      => 'TimeDate',
    'Template'          => 'Template-Toolkit',
    'GD::Graph'         => 'GDGraph',
    'GD::Text::Align'   => 'GDTextUtil',
    'Mail::Mailer'      => 'MailTools',
    # We provide Template 2.14 or lower for Win32, so it still includes
    # the GD plugin.
    'Template::Plugin::GD' => 'Template-Toolkit',
};

sub check_requirements {
    my ($output) = @_;

    print "\nChecking perl modules...\n" if $output;
    my $modules = REQUIRED_MODULES;
    my $root = ROOT_USER;
    my %missing;

    foreach my $module (@{$modules}) {
        unless (have_vers($module->{name}, $module->{version}, $output)) {
            $missing{$module->{name}} = $module->{version};
        }
    }

    print "\nYou need one of the following DBD modules installed, depending",
          " on\nwhich database you are using with Bugzilla:\n" if $output;

    my $have_one_dbd = 0;
    my $db_modules = DB_MODULE;
    foreach my $db (keys %$db_modules) {
        if (have_vers($db_modules->{$db}->{dbd},
                      $db_modules->{$db}->{dbd_version}, $output))
        {
            $have_one_dbd = 1;
        }
    }

    print "\nThe following Perl modules are optional:\n" if $output;
    my $opt_modules = OPTIONAL_MODULES;
    my %have_mod;
    foreach my $module (@$opt_modules) {
        $have_mod{$module->{name}} =
            have_vers($module->{name}, $module->{version}, $output);
    }

    print "\nThe following modules are required for mod_perl support:\n"
        if $output;
    my $mp_modules = MOD_PERL_MODULES;
    foreach my $module (@$mp_modules) {
        $have_mod{$module->{name}} =
            have_vers($module->{name}, $module->{version}, $output);
    }

    # If we're running on Windows, reset the input line terminator so that
    # console input works properly - loading CGI tends to mess it up
    $/ = "\015\012" if ON_WINDOWS;

    if ($output) {
        print "\n";

        if ($^O =~ /MSWin32/i) {
            print "All the required modules are available at:\n",
                  "    http://landfill.bugzilla.org/ppm/\n",
                  "You can add the repository with the following command:\n",
                  "    ppm rep add bugzilla http://landfill.bugzilla.org/ppm/",
                  "\n\n";
        }

       # New/Old Charts
       if ((!$have_mod{'GD'} || !$have_mod{'Chart::Base'})) {
            print "If you you want to see graphical bug charts (plotting",
                  " historical data over \ntime), you should install libgd",
                  " and the following Perl modules (as $root):\n\n";
            print "    GD:    " . install_command("GD") ."\n" 
                if !$have_mod{'GD'};
            print "    Chart: " . install_command("Chart::Base") . "\n"
                if !$have_mod{'Chart::Base'};
            print "\n";
        }

        # Bug Import/Export
        if (!$have_mod{'XML::Twig'}) {
            print "If you want to use the bug import/export feature to move",
                  " bugs to or from\nother bugzilla installations, you will",
                  " need to install the XML::Twig\nmodule by running",
                  " (as $root):\n\n",
                  "    " . install_command("XML::Twig") . "\n\n";
         }

         # Automatic Updates
         if (!$have_mod{'LWP::UserAgent'}) {
             print "If you want to use the automatic update notification",
                   " feature you will\nneed to install the LWP::UserAgent",
                   " module by running (as $root):\n\n",
                   "    " . install_command("LWP::UserAgent") . "\n\n";
        }

        # BMP to PNG
        if (!$have_mod{'Image::Magick'}) {
            print "If you want to convert BMP image attachments to PNG to",
                  " conserve\ndisk space, you will need to install the",
                  " ImageMagick application\nAvailable from",
                  " http://www.imagemagick.org, and the Image::Magick\n",
                  "Perl module by running (as $root):\n\n",
                  "    " . install_command("Image::Magick") . "\n\n";
        }

        # Web Services
        if (!$have_mod{'SOAP::Lite'}) {
            print "If you want your Bugzilla installation to be accessible\n",
                  "via its Web Service interface, you will need to install\n",
                  "the SOAP::Lite module by running (as $root):\n\n";
            print "    SOAP::Lite:      " .
                  install_command("SOAP::Lite") . "\n\n";
        }

        # Graphical Reports
        if (!$have_mod{'GD'} || !$have_mod{'GD::Graph'}
            || !$have_mod{'GD::Text::Align'}
            || !$have_mod{'Template::Plugin::GD::Image'})
        {
            print "If you want to see graphical bug reports (bar, pie and",
                  " line charts of \ncurrent data), you should install libgd",
                  " and the following Perl modules:\n\n";
            print "    GD:              " . install_command("GD") . "\n" 
                if !$have_mod{'GD'};
            print "    GD::Graph:       " . install_command("GD::Graph") . "\n"
                if !$have_mod{'GD::Graph'};
            print "    GD::Text::Align: " . install_command("GD::Text::Align") 
                . "\n" if !$have_mod{'GD::Text::Align'};
            print "    Template::Plugin::GD: " 
                . install_command('Template::Plugin::GD') . "\n" 
                if !$have_mod{'Template::Plugin::GD::Image'};
            print "\n";
        }

        # Diff View
        if (!$have_mod{'PatchReader'}) {
            print "If you want to see pretty HTML views of patches, you",
                  " should install the \nPatchReader module by running",
                  " (as $root):\n\n",
                  "    " . install_command("PatchReader") . "\n\n";
        }

        # LDAP
        if (!$have_mod{'Net::LDAP'}) {
            print "If you wish to use LDAP authentication, then you must",
                  " install Net::LDAP\nby running (as $root):\n\n",
                  "    " . install_command('Net::LDAP') . "\n\n";
        }

        # mod_perl
        if (!$have_mod{'mod_perl2'}) {
            print "If you would like mod_perl support, you must install at",
                  " least the minimum\nrequired version of mod_perl. You",
                  " can download mod_perl from:\n",
                  "    http://perl.apache.org/download/binaries.html\n",
                  "Make sure that you get the 2.0 version, not the 1.0",
                  " version.\n\n";
        }

        if (!$have_mod{'Apache::DBI'} || !$have_mod{'CGI'}) {
            print "For mod_perl support, you must install the following",
                  " perl module(s):\n\n";
            print "    Apache::DBI: " . install_command('Apache::DBI') . "\n"
                if !$have_mod{'Apache::DBI'};
            print "    CGI:         " . install_command('CGI') . "\n"
                if !$have_mod{'CGI'};
            print "\n";
        }
    }

    if (!$have_one_dbd) {
        print "\n";
        print "Bugzilla requires that at least one DBD module be",
              " installed in order to\naccess a database. You can install",
              " the correct one by running (as $root) the\ncommand listed",
              " below for your database:\n\n";

        foreach my $db (keys %$db_modules) {
            print $db_modules->{$db}->{name} . ": "
                  . install_command($db_modules->{$db}->{dbd}) . "\n";
            print "   Minimum version required: "
                  . $db_modules->{$db}->{dbd_version} . "\n";
        }
        print "\n";
    }

    if (%missing) {
        print "\n";
        print "Bugzilla requires some Perl modules which are either",
              " missing from your\nsystem, or the version on your system",
              " is too old. They can be installed\nby running (as $root)",
              " the following:\n";

        foreach my $module (keys %missing) {
            print "   " . install_command("$module") . "\n";
            if ($missing{$module} > 0) {
                print "   Minimum version required: $missing{$module}\n";
            }
        }
        print "\n";
    }

    return {
        pass     => !scalar(keys %missing) && $have_one_dbd,
        missing  => \%missing,
        optional => \%have_mod,
    }

}

sub check_graphviz {
    my ($output) = @_;

    return 1 if (Bugzilla->params->{'webdotbase'} =~ /^https?:/);

    printf("Checking for %15s %-9s ", "GraphViz", "(any)") if $output;

    my $return = 0;
    if(-x Bugzilla->params->{'webdotbase'}) {
        print "ok: found\n" if $output;
        $return = 1;
    } else {
        print "not a valid executable: " . Bugzilla->params->{'webdotbase'} . "\n";
    }

    my $webdotdir = bz_locations()->{'webdotdir'};
    # Check .htaccess allows access to generated images
    if (-e "$webdotdir/.htaccess") {
        my $htaccess = new IO::File("$webdotdir/.htaccess", 'r') 
            || die "$webdotdir/.htaccess: " . $!;
        if (!grep(/png/, $htaccess->getlines)) {
            print "Dependency graph images are not accessible.\n";
            print "delete $webdotdir/.htaccess and re-run checksetup.pl to fix.\n";
        }
        $htaccess->close;
    }

    return $return;
}


# This was originally clipped from the libnet Makefile.PL, adapted here to
# use the below vers_cmp routine for accurate version checking.
sub have_vers {
    my ($pkg, $wanted, $output) = @_;
    my ($msg, $vnum, $vstr);
    no strict 'refs';
    printf("Checking for %15s %-9s ", $pkg, !$wanted?'(any)':"(v$wanted)") 
        if $output;

    # Modules may change $SIG{__DIE__} and $SIG{__WARN__}, so localise them here
    # so that later errors display 'normally'
    local $::SIG{__DIE__};
    local $::SIG{__WARN__};

    eval "require $pkg;";

    # do this twice to avoid a "used only once" error for these vars
    $vnum = ${"${pkg}::VERSION"} || ${"${pkg}::Version"} || 0;
    $vnum = ${"${pkg}::VERSION"} || ${"${pkg}::Version"} || 0;
    $vnum = -1 if $@;

    # CGI's versioning scheme went 2.75, 2.751, 2.752, 2.753, 2.76
    # That breaks the standard version tests, so we need to manually correct
    # the version
    if ($pkg eq 'CGI' && $vnum =~ /(2\.7\d)(\d+)/) {
        $vnum = $1 . "." . $2;
    }

    if ($vnum eq "-1") { # string compare just in case it's non-numeric
        $vstr = "not found";
    }
    elsif (vers_cmp($vnum,"0") > -1) {
        $vstr = "found v$vnum";
    }
    else {
        $vstr = "found unknown version";
    }

    my $vok = (vers_cmp($vnum,$wanted) > -1);
    print ((($vok) ? "ok: " : " "), "$vstr\n") if $output;
    return $vok ? 1 : 0;
}

# This is taken straight from Sort::Versions 1.5, which is not included
# with perl by default.
sub vers_cmp {
    my ($a, $b) = @_;

    # Remove leading zeroes - Bug 344661
    $a =~ s/^0*(\d.+)/$1/;
    $b =~ s/^0*(\d.+)/$1/;

    my @A = ($a =~ /([-.]|\d+|[^-.\d]+)/g);
    my @B = ($b =~ /([-.]|\d+|[^-.\d]+)/g);

    my ($A, $B);
    while (@A and @B) {
        $A = shift @A;
        $B = shift @B;
        if ($A eq '-' and $B eq '-') {
            next;
        } elsif ( $A eq '-' ) {
            return -1;
        } elsif ( $B eq '-') {
            return 1;
        } elsif ($A eq '.' and $B eq '.') {
            next;
        } elsif ( $A eq '.' ) {
            return -1;
        } elsif ( $B eq '.' ) {
            return 1;
        } elsif ($A =~ /^\d+$/ and $B =~ /^\d+$/) {
            if ($A =~ /^0/ || $B =~ /^0/) {
                return $A cmp $B if $A cmp $B;
            } else {
                return $A <=> $B if $A <=> $B;
            }
        } else {
            $A = uc $A;
            $B = uc $B;
            return $A cmp $B if $A cmp $B;
        }
    }
    @A <=> @B;
}

sub install_command {
    my $module = shift;
    if ($^O =~ /MSWin32/i) {
        return "ppm install " . WIN32_MODULE_NAMES->{$module} if
            WIN32_MODULE_NAMES->{$module};
        $module =~ s/::/-/g;
        return "ppm install " . $module;
    } else {
        return "$^X -MCPAN -e 'install \"$module\"'";
    }
}


1;

__END__

=head1 NAME

Bugzilla::Install::Requirements - Functions and variables dealing
  with Bugzilla's perl-module requirements.

=head1 DESCRIPTION

This module is used primarily by C<checksetup.pl> to determine whether
or not all of Bugzilla's prerequisites are installed. (That is, all the
perl modules it requires.)

=head1 CONSTANTS

=over 4

=item C<REQUIRED_MODULES>

An arrayref of hashrefs that describes the perl modules required by 
Bugzilla. The hashes have two keys, C<name> and C<version>, which
represent the name of the module and the version that we require.

=back

=head1 SUBROUTINES

=over 4

=item C<check_requirements($output)>

 Description: This checks what optional or required perl modules
              are installed, like C<checksetup.pl> does.

 Params:      C<$output> - C<true> if you want the function to print
                           out information about what it's doing,
                           and the versions of everything installed.
                           If you don't pass the minimum requirements,
                           the will always print out something, 
                           regardless of this parameter.

 Returns:    A hashref containing three values:
             C<pass> - Whether or not we have all the mandatory 
                       requirements.
             C<missing> - A hash showing which mandatory requirements
                          are missing. The key is the module name,
                          and the value is the version we require.
             C<optional> - Which optional modules are installed and
                           up-to-date enough for Bugzilla.

=item C<check_graphviz($output)>

Description: Checks if the graphviz binary specified in the 
  C<webdotbase> parameter is a valid binary, or a valid URL.

Params:      C<$output> - C<$true> if you want the function to
                 print out information about what it's doing.

Returns:     C<1> if the check was successful, C<0> otherwise.

=item C<vers_cmp($a, $b)>

 Description: This is a comparison function, like you would use in
              C<sort>, except that it compares two version numbers.
              It's actually identical to versioncmp from 
              L<Sort::Versions>.

 Params:      c<$a> and C<$b> are versions you want to compare.

 Returns:     -1 if $a is less than $b, 0 if they are equal, and
              1 if $a is greater than $b.

=item C<have_vers($pkg, $wanted, $output)>

 Description: Tells you whether or not you have the appropriate
              version of the module requested. It also prints
              out a message to the user explaining the check
              and the result.

 Params:      C<$pkg> - A string, the name of the package you're checking.
              C<$wanted> - The version of the package you require.
                           Set this to 0 if you don't require any
                           particular version.
              C<$output> - Set to true if you want this function to
                           print information to STDOUT about what it's
                           doing.

 Returns:   C<1> if you have the module installed and you have the
            appropriate version. C<0> otherwise.

=item C<install_command($module)>

 Description: Prints out the appropriate command to install the
              module specified, depending on whether you're
              on Windows or Linux.

 Params:      C<$module> - The name of the module.

 Returns:     nothing

=back