summaryrefslogtreecommitdiffstats
path: root/Bugzilla/Install/CPAN.pm
blob: 19f14319083ba79febd23fbd4b9acd6d3478229d (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
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

package Bugzilla::Install::CPAN;

use 5.10.1;
use strict;
use warnings;

use parent qw(Exporter);
our @EXPORT = qw(
    BZ_LIB

    check_cpan_requirements 
    set_cpan_config
    install_module 
);

use Bugzilla::Constants;
use Bugzilla::Install::Requirements qw(have_vers);
use Bugzilla::Install::Util qw(bin_loc install_string);

use Config;
use CPAN;
use Cwd qw(abs_path);
use File::Path qw(rmtree);

# These are required for install-module.pl to be able to install
# all modules properly.
use constant REQUIREMENTS => (
    {
        module  => 'CPAN',
        package => 'CPAN',
        version => '1.81',
    },
    {
        # When Module::Build isn't installed, the YAML module allows
        # CPAN to read META.yml to determine that Module::Build first
        # needs to be installed to compile a module.
        module  => 'YAML',
        package => 'YAML',
        version => 0,
    },
    {
        # Many modules on CPAN are now built with Dist::Zilla, which
        # unfortunately means they require this version of EU::MM to install.
        module  => 'ExtUtils::MakeMaker',
        package => 'ExtUtils-MakeMaker',
        version => '6.31',
    },
);

# We need the absolute path of ext_libpath, because CPAN chdirs around
# and so we can't use a relative directory.
#
# We need it often enough (and at compile time, in install-module.pl) so 
# we make it a constant.
use constant BZ_LIB => abs_path(bz_locations()->{ext_libpath});

# CPAN requires nearly all of its parameters to be set, or it will start
# asking questions to the user. We want to avoid that, so we have
# defaults here for most of the required parameters we know about, in case
# any of them aren't set. The rest are handled by set_cpan_defaults().
use constant CPAN_DEFAULTS => {
    auto_commit => 0,
    # We always force builds, so there's no reason to cache them.
    build_cache => 0,
    build_requires_install_policy => 'yes',
    cache_metadata => 1,
    colorize_output => 1,
    colorize_print => 'bold',
    index_expire => 1,
    scan_cache => 'atstart',

    inhibit_startup_message => 1,

    bzip2 => bin_loc('bzip2'),
    curl => bin_loc('curl'),
    gzip => bin_loc('gzip'),
    links => bin_loc('links'),
    lynx => bin_loc('lynx'),
    make => bin_loc('make'),
    pager => bin_loc('less'),
    tar => bin_loc('tar'),
    unzip => bin_loc('unzip'),
    wget => bin_loc('wget'),

    urllist => ['http://www.cpan.org/'],
};

sub check_cpan_requirements {
    my ($original_dir, $original_args) = @_;

    _require_compiler();

    my @install;
    foreach my $module (REQUIREMENTS) {
        my $installed = have_vers($module, 1);
        push(@install, $module) if !$installed;
    }

    return if !@install;

    my $restart_required;
    foreach my $module (@install) {
        $restart_required = 1 if $module->{module} eq 'CPAN';
        install_module($module->{module}, 1);
    }

    if ($restart_required) {
        chdir $original_dir;
        exec($^X, $0, @$original_args);
    }
}

sub _require_compiler {
    my @errors;

    my $cc_name = $Config{cc};
    my $cc_exists = bin_loc($cc_name);

    if (!$cc_exists) {
        push(@errors, install_string('install_no_compiler'));
    }

    my $make_name = $CPAN::Config->{make};
    my $make_exists = bin_loc($make_name);

    if (!$make_exists) {
        push(@errors, install_string('install_no_make'));
    }

    die @errors if @errors;
}

sub install_module {
    my ($name, $test) = @_;
    my $bzlib = BZ_LIB;

    # Make Module::AutoInstall install all dependencies and never prompt.
    local $ENV{PERL_AUTOINSTALL} = '--alldeps';
    # This makes Net::SSLeay not prompt the user, if it gets installed.
    # It also makes any other MakeMaker prompts accept their defaults.
    local $ENV{PERL_MM_USE_DEFAULT} = 1;

    # Certain modules require special stuff in order to not prompt us.
    my $original_makepl = $CPAN::Config->{makepl_arg};
    # This one's a regex in case we're doing Template::Plugin::GD and it
    # pulls in Template-Toolkit as a dependency.
    if ($name =~ /^Template/) {
        $CPAN::Config->{makepl_arg} .= " TT_ACCEPT=y TT_EXTRAS=n";
    }
    elsif ($name eq 'XML::Twig') {
        $CPAN::Config->{makepl_arg} = "-n $original_makepl";
    }
    elsif ($name eq 'SOAP::Lite') {
        $CPAN::Config->{makepl_arg} .= " --noprompt";
    }

    my $module = CPAN::Shell->expand('Module', $name);
    if (!$module) {
        die install_string('no_such_module', { module => $name }) . "\n";
    }

    print install_string('install_module', 
              { module => $name, version => $module->cpan_version }) . "\n";

    if ($test) {
        CPAN::Shell->force('install', $name);
    }
    else {
        CPAN::Shell->notest('install', $name);
    }

    # If it installed any binaries in the Bugzilla directory, delete them.
    if (-d "$bzlib/bin") {
        File::Path::rmtree("$bzlib/bin");
    }

    $CPAN::Config->{makepl_arg} = $original_makepl;
}

sub set_cpan_config {
    my $do_global = shift;
    my $bzlib = BZ_LIB;

    # We set defaults before we do anything, otherwise CPAN will
    # start asking us questions as soon as we load its configuration.
    eval { require CPAN::Config; };
    _set_cpan_defaults();

    # Calling a senseless autoload that does nothing makes us
    # automatically load any existing configuration.
    # We want to avoid the "invalid command" message.
    open(my $saveout, ">&STDOUT");
    open(STDOUT, '>/dev/null');
    eval { CPAN->ignore_this_error_message_from_bugzilla; };
    undef $@;
    close(STDOUT);
    open(STDOUT, '>&', $saveout);

    my $dir = $CPAN::Config->{cpan_home};
    if (!defined $dir || !-w $dir) {
        # If we can't use the standard CPAN build dir, we try to make one.
        $dir = "$ENV{HOME}/.cpan";
        mkdir $dir;

        # If we can't make one, we finally try to use the Bugzilla directory.
        if (!-w $dir) {
            print STDERR install_string('cpan_bugzilla_home'), "\n";
            $dir = "$bzlib/.cpan";
        }
    }
    $CPAN::Config->{cpan_home} = $dir;
    $CPAN::Config->{build_dir} = "$dir/build";
    # We always force builds, so there's no reason to cache them.
    $CPAN::Config->{keep_source_where} = "$dir/source";
    # This is set both here and in defaults so that it's always true.
    $CPAN::Config->{inhibit_startup_message} = 1;
    # Automatically install dependencies.
    $CPAN::Config->{prerequisites_policy} = 'follow';
    
    # Unless specified, we install the modules into the Bugzilla directory.
    if (!$do_global) {
        require Config;

        $CPAN::Config->{makepl_arg} .= " LIB=\"$bzlib\""
            . " INSTALLMAN1DIR=\"$bzlib/man/man1\""
            . " INSTALLMAN3DIR=\"$bzlib/man/man3\""
            # The bindirs are here because otherwise we'll try to write to
            # the system binary dirs, and that will cause CPAN to die.
            . " INSTALLBIN=\"$bzlib/bin\""
            . " INSTALLSCRIPT=\"$bzlib/bin\""
            # INSTALLDIRS=perl is set because that makes sure that MakeMaker
            # always uses the directories we've specified here.
            . " INSTALLDIRS=perl";
        $CPAN::Config->{mbuild_arg} = " --install_base \"$bzlib\""
            . " --install_path lib=\"$bzlib\""
            . " --install_path arch=\"$bzlib/$Config::Config{archname}\"";
        $CPAN::Config->{mbuild_install_arg} = $CPAN::Config->{mbuild_arg};

        # When we're not root, sometimes newer versions of CPAN will
        # try to read/modify things that belong to root, unless we set
        # certain config variables.
        $CPAN::Config->{histfile} = "$dir/histfile";
        $CPAN::Config->{use_sqlite} = 0;
        $CPAN::Config->{prefs_dir} = "$dir/prefs";

        # Unless we actually set PERL5LIB, some modules can't install
        # themselves, like DBD::mysql, DBD::Pg, and XML::Twig.
        my $current_lib = $ENV{PERL5LIB} ? $ENV{PERL5LIB} . ':' : '';
        $ENV{PERL5LIB} = $current_lib . $bzlib;
    }
}

sub _set_cpan_defaults {
    # If CPAN hasn't been configured, we try to use some reasonable defaults.
    foreach my $key (keys %{CPAN_DEFAULTS()}) {
        $CPAN::Config->{$key} = CPAN_DEFAULTS->{$key}
            if !defined $CPAN::Config->{$key};
    }

    my @missing;
    # In newer CPANs, this is in HandleConfig. In older CPANs, it's in
    # Config.
    if (eval { require CPAN::HandleConfig }) {
        @missing = CPAN::HandleConfig->missing_config_data;
    }
    else {
        @missing = CPAN::Config->missing_config_data;
    }

    foreach my $key (@missing) {
        $CPAN::Config->{$key} = '';
    }
}

1;

__END__

=head1 NAME

Bugzilla::Install::CPAN - Routines to install Perl modules from CPAN.

=head1 SYNOPSIS

 use Bugzilla::Install::CPAN;

 set_cpan_config();
 install_module('Module::Name');

=head1 DESCRIPTION

This is primarily used by L<install-module> to do the "hard work" of
installing CPAN modules.

=head1 SUBROUTINES

=over

=item C<set_cpan_config>

Sets up the configuration of CPAN for this session. Must be called
before L</install_module>. Takes one boolean parameter. If true,
L</install_module> will install modules globally instead of to the
local F<lib/> directory. On most systems, you have to be root to do that.

=item C<install_module>

Installs a module from CPAN. Takes two arguments:

=over

=item C<$name> - The name of the module, just like you'd pass to the
C<install> command in the CPAN shell.

=item C<$test> - If true, we run tests on this module before installing,
but we still force the install if the tests fail. This is only used
when we internally install a newer CPAN module.

=back

Note that calling this function prints a B<lot> of information to
STDOUT and STDERR.

=back

=head1 B<Methods in need of POD>

=over

=item check_cpan_requirements

=back