2
package Module::Install;
5
# The load order for Module::Install is a bit magic.
6
# It goes something like this...
8
# IF ( host has Module::Install installed, creating author mode ) {
9
# 1. Makefile.PL calls "use inc::Module::Install"
10
# 2. $INC{inc/Module/Install.pm} set to installed version of inc::Module::Install
11
# 3. The installed version of inc::Module::Install loads
12
# 4. inc::Module::Install calls "require Module::Install"
13
# 5. The ./inc/ version of Module::Install loads
15
# 1. Makefile.PL calls "use inc::Module::Install"
16
# 2. $INC{inc/Module/Install.pm} set to ./inc/ version of Module::Install
17
# 3. The ./inc/ version of Module::Install loads
25
use vars qw{$VERSION};
27
# All Module::Install core packages now require synchronised versions.
28
# This will be used to ensure we don't accidentally load old or
29
# different versions of modules.
30
# This is not enforced yet, but will be some time in the next few
31
# releases once we can make sure it won't clash with custom
32
# Module::Install extensions.
35
*inc::Module::Install::VERSION = *VERSION;
36
@inc::Module::Install::ISA = __PACKAGE__;
44
# Whether or not inc::Module::Install is actually loaded, the
45
# $INC{inc/Module/Install.pm} is what will still get set as long as
46
# the caller loaded module this in the documented manner.
47
# If not set, the caller may NOT have loaded the bundled version, and thus
48
# they may not have a MI version that works with the Makefile.PL. This would
49
# result in false errors or unexpected behaviour. And we don't want that.
50
my $file = join( '/', 'inc', split /::/, __PACKAGE__ ) . '.pm';
51
unless ( $INC{$file} ) { die <<"END_DIE" }
53
Please invoke ${\__PACKAGE__} with:
55
use inc::${\__PACKAGE__};
67
# If the script that is loading Module::Install is from the future,
68
# then make will detect this and cause it to re-run over and over
69
# again. This is bad. Rather than taking action to touch it (which
70
# is unreliable on some platforms and requires write permissions)
71
# for now we should catch this and refuse to run.
72
if ( -f $0 and (stat($0))[9] > time ) { die <<"END_DIE" }
74
Your installer $0 has a modification time in the future.
76
This is known to create infinite loops in make.
78
Please correct this, then run $0 again.
86
# Build.PL was formerly supported, but no longer is due to excessive
87
# difficulty in implementing every single feature twice.
88
if ( $0 =~ /Build.PL$/i ) { die <<"END_DIE" }
90
Module::Install no longer supports Build.PL.
92
It was impossible to maintain duel backends, and has been deprecated.
94
Please remove all Build.PL files and only use the Makefile.PL installer.
102
# To save some more typing in Module::Install installers, every...
103
# use inc::Module::Install
104
# ...also acts as an implicit use strict.
105
$^H |= strict::bits(qw(refs subs vars));
118
my $who = $self->_caller;
119
my $cwd = Cwd::cwd();
120
my $sym = "${who}::AUTOLOAD";
122
my $pwd = Cwd::cwd();
123
if ( my $code = $sym->{$pwd} ) {
124
# delegate back to parent dirs
125
goto &$code unless $cwd eq $pwd;
127
$$sym =~ /([^:]+)$/ or die "Cannot autoload $who - $sym";
128
unless ( uc($1) eq $1 ) {
129
unshift @_, ( $self, $1 );
130
goto &{$self->can('call')};
137
my $self = $class->new(@_);
138
my $who = $self->_caller;
140
unless ( -f $self->{file} ) {
141
require "$self->{path}/$self->{dispatch}.pm";
142
File::Path::mkpath("$self->{prefix}/$self->{author}");
143
$self->{admin} = "$self->{name}::$self->{dispatch}"->new( _top => $self );
144
$self->{admin}->init;
145
@_ = ($class, _self => $self);
146
goto &{"$self->{name}::import"};
149
*{"${who}::AUTOLOAD"} = $self->autoload;
152
# Unregister loader and worker packages so subdirs can use them again
153
delete $INC{"$self->{file}"};
154
delete $INC{"$self->{path}.pm"};
161
unless ( $self->{extensions} ) {
162
$self->load_extensions(
163
"$self->{prefix}/$self->{path}", $self
167
my @exts = @{$self->{extensions}};
169
my $admin = $self->{admin};
170
@exts = $admin->load_all_extensions;
174
foreach my $obj ( @exts ) {
175
while (my ($method, $glob) = each %{ref($obj) . '::'}) {
176
next unless $obj->can($method);
177
next if $method =~ /^_/;
178
next if $method eq uc($method);
183
my $who = $self->_caller;
184
foreach my $name ( sort keys %seen ) {
185
*{"${who}::$name"} = sub {
186
${"${who}::AUTOLOAD"} = "${who}::$name";
187
goto &{"${who}::AUTOLOAD"};
193
my ($class, %args) = @_;
195
# ignore the prefix on extension modules built from top level.
196
my $base_path = Cwd::abs_path($FindBin::Bin);
197
unless ( Cwd::abs_path(Cwd::cwd()) eq $base_path ) {
198
delete $args{prefix};
201
return $args{_self} if $args{_self};
203
$args{dispatch} ||= 'Admin';
204
$args{prefix} ||= 'inc';
205
$args{author} ||= ($^O eq 'VMS' ? '_author' : '.author');
206
$args{bundle} ||= 'inc/BUNDLES';
207
$args{base} ||= $base_path;
208
$class =~ s/^\Q$args{prefix}\E:://;
209
$args{name} ||= $class;
210
$args{version} ||= $class->VERSION;
211
unless ( $args{path} ) {
212
$args{path} = $args{name};
213
$args{path} =~ s!::!/!g;
215
$args{file} ||= "$args{base}/$args{prefix}/$args{path}.pm";
218
bless( \%args, $class );
222
my ($self, $method) = @_;
223
my $obj = $self->load($method) or return;
224
splice(@_, 0, 2, $obj);
225
goto &{$obj->can($method)};
229
my ($self, $method) = @_;
231
$self->load_extensions(
232
"$self->{prefix}/$self->{path}", $self
233
) unless $self->{extensions};
235
foreach my $obj (@{$self->{extensions}}) {
236
return $obj if $obj->can($method);
239
my $admin = $self->{admin} or die <<"END_DIE";
240
The '$method' method does not exist in the '$self->{prefix}' path!
241
Please remove the '$self->{prefix}' directory and run $0 again to load it.
244
my $obj = $admin->load($method, 1);
245
push @{$self->{extensions}}, $obj;
250
sub load_extensions {
251
my ($self, $path, $top) = @_;
253
unless ( grep { lc $_ eq lc $self->{prefix} } @INC ) {
254
unshift @INC, $self->{prefix};
257
foreach my $rv ( $self->find_extensions($path) ) {
258
my ($file, $pkg) = @{$rv};
259
next if $self->{pathnames}{$pkg};
262
my $new = eval { require $file; $pkg->can('new') };
267
$self->{pathnames}{$pkg} = delete $INC{$file};
268
push @{$self->{extensions}}, &{$new}($pkg, _top => $top );
271
$self->{extensions} ||= [];
274
sub find_extensions {
275
my ($self, $path) = @_;
278
File::Find::find( sub {
279
my $file = $File::Find::name;
280
return unless $file =~ m!^\Q$path\E/(.+)\.pm\Z!is;
282
return if lc($subpath) eq lc($self->{dispatch});
284
$file = "$self->{path}/$subpath.pm";
285
my $pkg = "$self->{name}::$subpath";
288
# If we have a mixed-case package name, assume case has been preserved
289
# correctly. Otherwise, root through the file to locate the case-preserved
290
# version of the package name.
291
if ( $subpath eq lc($subpath) || $subpath eq uc($subpath) ) {
292
my $content = Module::Install::_read($subpath . '.pm');
294
foreach ( split //, $content ) {
295
$in_pod = 1 if /^=\w/;
296
$in_pod = 0 if /^=cut/;
297
next if ($in_pod || /^=cut/); # skip pod text
298
next if /^\s*#/; # and comments
299
if ( m/^\s*package\s+($pkg)\s*;/i ) {
306
push @found, [ $file, $pkg ];
307
}, $path ) if -d $path;
316
#####################################################################
321
my $call = caller($depth);
322
while ( $call eq __PACKAGE__ ) {
324
$call = caller($depth);
331
open FH, "< $_[0]" or die "open($_[0]): $!";
332
my $str = do { local $/; <FH> };
333
close FH or die "close($_[0]): $!";
339
open FH, "> $_[0]" or die "open($_[0]): $!";
340
foreach ( 1 .. $#_ ) { print FH $_[$_] or die "print($_[0]): $!" }
341
close FH or die "close($_[0]): $!";
344
# _version is for processing module versions (eg, 1.03_05) not
345
# Perl versions (eg, 5.8.1).
351
my @v = map { $_ . '0' x (3 - length $_) } $s =~ /(\d{1,3})\D?/g;
352
$l = $l . '.' . join '', @v if @v;
356
# Cloned from Params::Util::_CLASS
363
$_[0] =~ m/^[^\W\d]\w*(?:::\w+)*$/s
369
# Copyright 2008 Adam Kennedy.