[1375a6a] | 1 | #line 1 |
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| 2 | package Module::Install; |
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| 3 | |
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| 4 | # For any maintainers: |
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| 5 | # The load order for Module::Install is a bit magic. |
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| 6 | # It goes something like this... |
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| 7 | # |
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| 8 | # IF ( host has Module::Install installed, creating author mode ) { |
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| 9 | # 1. Makefile.PL calls "use inc::Module::Install" |
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| 10 | # 2. $INC{inc/Module/Install.pm} set to installed version of inc::Module::Install |
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| 11 | # 3. The installed version of inc::Module::Install loads |
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| 12 | # 4. inc::Module::Install calls "require Module::Install" |
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| 13 | # 5. The ./inc/ version of Module::Install loads |
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| 14 | # } ELSE { |
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| 15 | # 1. Makefile.PL calls "use inc::Module::Install" |
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| 16 | # 2. $INC{inc/Module/Install.pm} set to ./inc/ version of Module::Install |
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| 17 | # 3. The ./inc/ version of Module::Install loads |
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| 18 | # } |
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| 19 | |
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| 20 | BEGIN { |
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| 21 | require 5.004; |
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| 22 | } |
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| 23 | use strict 'vars'; |
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| 24 | |
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| 25 | use vars qw{$VERSION}; |
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| 26 | BEGIN { |
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| 27 | # All Module::Install core packages now require synchronised versions. |
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| 28 | # This will be used to ensure we don't accidentally load old or |
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| 29 | # different versions of modules. |
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| 30 | # This is not enforced yet, but will be some time in the next few |
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| 31 | # releases once we can make sure it won't clash with custom |
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| 32 | # Module::Install extensions. |
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| 33 | $VERSION = '0.79'; |
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| 34 | |
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| 35 | *inc::Module::Install::VERSION = *VERSION; |
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| 36 | @inc::Module::Install::ISA = __PACKAGE__; |
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| 37 | |
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| 38 | } |
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| 39 | |
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| 40 | |
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| 41 | |
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| 42 | |
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| 43 | |
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| 44 | # Whether or not inc::Module::Install is actually loaded, the |
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| 45 | # $INC{inc/Module/Install.pm} is what will still get set as long as |
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| 46 | # the caller loaded module this in the documented manner. |
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| 47 | # If not set, the caller may NOT have loaded the bundled version, and thus |
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| 48 | # they may not have a MI version that works with the Makefile.PL. This would |
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| 49 | # result in false errors or unexpected behaviour. And we don't want that. |
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| 50 | my $file = join( '/', 'inc', split /::/, __PACKAGE__ ) . '.pm'; |
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| 51 | unless ( $INC{$file} ) { die <<"END_DIE" } |
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| 52 | |
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| 53 | Please invoke ${\__PACKAGE__} with: |
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| 54 | |
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| 55 | use inc::${\__PACKAGE__}; |
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| 56 | |
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| 57 | not: |
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| 58 | |
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| 59 | use ${\__PACKAGE__}; |
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| 60 | |
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| 61 | END_DIE |
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| 62 | |
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| 63 | |
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| 64 | |
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| 65 | |
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| 66 | |
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| 67 | # If the script that is loading Module::Install is from the future, |
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| 68 | # then make will detect this and cause it to re-run over and over |
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| 69 | # again. This is bad. Rather than taking action to touch it (which |
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| 70 | # is unreliable on some platforms and requires write permissions) |
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| 71 | # for now we should catch this and refuse to run. |
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| 72 | if ( -f $0 and (stat($0))[9] > time ) { die <<"END_DIE" } |
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| 73 | |
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| 74 | Your installer $0 has a modification time in the future. |
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| 75 | |
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| 76 | This is known to create infinite loops in make. |
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| 77 | |
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| 78 | Please correct this, then run $0 again. |
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| 79 | |
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| 80 | END_DIE |
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| 81 | |
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| 82 | |
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| 83 | |
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| 84 | |
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| 85 | |
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| 86 | # Build.PL was formerly supported, but no longer is due to excessive |
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| 87 | # difficulty in implementing every single feature twice. |
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| 88 | if ( $0 =~ /Build.PL$/i ) { die <<"END_DIE" } |
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| 89 | |
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| 90 | Module::Install no longer supports Build.PL. |
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| 91 | |
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| 92 | It was impossible to maintain duel backends, and has been deprecated. |
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| 93 | |
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| 94 | Please remove all Build.PL files and only use the Makefile.PL installer. |
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| 95 | |
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| 96 | END_DIE |
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| 97 | |
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| 98 | |
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| 99 | |
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| 100 | |
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| 101 | |
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| 102 | # To save some more typing in Module::Install installers, every... |
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| 103 | # use inc::Module::Install |
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| 104 | # ...also acts as an implicit use strict. |
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| 105 | $^H |= strict::bits(qw(refs subs vars)); |
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| 106 | |
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| 107 | |
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| 108 | |
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| 109 | |
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| 110 | |
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| 111 | use Cwd (); |
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| 112 | use File::Find (); |
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| 113 | use File::Path (); |
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| 114 | use FindBin; |
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| 115 | |
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| 116 | sub autoload { |
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| 117 | my $self = shift; |
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| 118 | my $who = $self->_caller; |
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| 119 | my $cwd = Cwd::cwd(); |
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| 120 | my $sym = "${who}::AUTOLOAD"; |
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| 121 | $sym->{$cwd} = sub { |
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| 122 | my $pwd = Cwd::cwd(); |
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| 123 | if ( my $code = $sym->{$pwd} ) { |
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| 124 | # delegate back to parent dirs |
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| 125 | goto &$code unless $cwd eq $pwd; |
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| 126 | } |
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| 127 | $$sym =~ /([^:]+)$/ or die "Cannot autoload $who - $sym"; |
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| 128 | unless ( uc($1) eq $1 ) { |
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| 129 | unshift @_, ( $self, $1 ); |
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| 130 | goto &{$self->can('call')}; |
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| 131 | } |
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| 132 | }; |
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| 133 | } |
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| 134 | |
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| 135 | sub import { |
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| 136 | my $class = shift; |
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| 137 | my $self = $class->new(@_); |
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| 138 | my $who = $self->_caller; |
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| 139 | |
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| 140 | unless ( -f $self->{file} ) { |
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| 141 | require "$self->{path}/$self->{dispatch}.pm"; |
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| 142 | File::Path::mkpath("$self->{prefix}/$self->{author}"); |
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| 143 | $self->{admin} = "$self->{name}::$self->{dispatch}"->new( _top => $self ); |
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| 144 | $self->{admin}->init; |
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| 145 | @_ = ($class, _self => $self); |
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| 146 | goto &{"$self->{name}::import"}; |
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| 147 | } |
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| 148 | |
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| 149 | *{"${who}::AUTOLOAD"} = $self->autoload; |
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| 150 | $self->preload; |
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| 151 | |
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| 152 | # Unregister loader and worker packages so subdirs can use them again |
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| 153 | delete $INC{"$self->{file}"}; |
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| 154 | delete $INC{"$self->{path}.pm"}; |
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| 155 | |
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| 156 | return 1; |
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| 157 | } |
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| 158 | |
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| 159 | sub preload { |
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| 160 | my $self = shift; |
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| 161 | unless ( $self->{extensions} ) { |
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| 162 | $self->load_extensions( |
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| 163 | "$self->{prefix}/$self->{path}", $self |
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| 164 | ); |
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| 165 | } |
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| 166 | |
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| 167 | my @exts = @{$self->{extensions}}; |
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| 168 | unless ( @exts ) { |
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| 169 | my $admin = $self->{admin}; |
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| 170 | @exts = $admin->load_all_extensions; |
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| 171 | } |
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| 172 | |
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| 173 | my %seen; |
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| 174 | foreach my $obj ( @exts ) { |
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| 175 | while (my ($method, $glob) = each %{ref($obj) . '::'}) { |
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| 176 | next unless $obj->can($method); |
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| 177 | next if $method =~ /^_/; |
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| 178 | next if $method eq uc($method); |
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| 179 | $seen{$method}++; |
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| 180 | } |
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| 181 | } |
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| 182 | |
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| 183 | my $who = $self->_caller; |
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| 184 | foreach my $name ( sort keys %seen ) { |
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| 185 | *{"${who}::$name"} = sub { |
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| 186 | ${"${who}::AUTOLOAD"} = "${who}::$name"; |
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| 187 | goto &{"${who}::AUTOLOAD"}; |
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| 188 | }; |
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| 189 | } |
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| 190 | } |
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| 191 | |
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| 192 | sub new { |
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| 193 | my ($class, %args) = @_; |
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| 194 | |
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| 195 | # ignore the prefix on extension modules built from top level. |
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| 196 | my $base_path = Cwd::abs_path($FindBin::Bin); |
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| 197 | unless ( Cwd::abs_path(Cwd::cwd()) eq $base_path ) { |
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| 198 | delete $args{prefix}; |
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| 199 | } |
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| 200 | |
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| 201 | return $args{_self} if $args{_self}; |
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| 202 | |
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| 203 | $args{dispatch} ||= 'Admin'; |
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| 204 | $args{prefix} ||= 'inc'; |
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| 205 | $args{author} ||= ($^O eq 'VMS' ? '_author' : '.author'); |
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| 206 | $args{bundle} ||= 'inc/BUNDLES'; |
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| 207 | $args{base} ||= $base_path; |
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| 208 | $class =~ s/^\Q$args{prefix}\E:://; |
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| 209 | $args{name} ||= $class; |
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| 210 | $args{version} ||= $class->VERSION; |
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| 211 | unless ( $args{path} ) { |
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| 212 | $args{path} = $args{name}; |
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| 213 | $args{path} =~ s!::!/!g; |
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| 214 | } |
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| 215 | $args{file} ||= "$args{base}/$args{prefix}/$args{path}.pm"; |
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| 216 | $args{wrote} = 0; |
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| 217 | |
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| 218 | bless( \%args, $class ); |
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| 219 | } |
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| 220 | |
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| 221 | sub call { |
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| 222 | my ($self, $method) = @_; |
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| 223 | my $obj = $self->load($method) or return; |
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| 224 | splice(@_, 0, 2, $obj); |
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| 225 | goto &{$obj->can($method)}; |
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| 226 | } |
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| 227 | |
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| 228 | sub load { |
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| 229 | my ($self, $method) = @_; |
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| 230 | |
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| 231 | $self->load_extensions( |
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| 232 | "$self->{prefix}/$self->{path}", $self |
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| 233 | ) unless $self->{extensions}; |
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| 234 | |
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| 235 | foreach my $obj (@{$self->{extensions}}) { |
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| 236 | return $obj if $obj->can($method); |
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| 237 | } |
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| 238 | |
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| 239 | my $admin = $self->{admin} or die <<"END_DIE"; |
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| 240 | The '$method' method does not exist in the '$self->{prefix}' path! |
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| 241 | Please remove the '$self->{prefix}' directory and run $0 again to load it. |
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| 242 | END_DIE |
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| 243 | |
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| 244 | my $obj = $admin->load($method, 1); |
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| 245 | push @{$self->{extensions}}, $obj; |
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| 246 | |
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| 247 | $obj; |
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| 248 | } |
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| 249 | |
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| 250 | sub load_extensions { |
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| 251 | my ($self, $path, $top) = @_; |
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| 252 | |
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| 253 | unless ( grep { !ref $_ and lc $_ eq lc $self->{prefix} } @INC ) { |
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| 254 | unshift @INC, $self->{prefix}; |
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| 255 | } |
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| 256 | |
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| 257 | foreach my $rv ( $self->find_extensions($path) ) { |
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| 258 | my ($file, $pkg) = @{$rv}; |
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| 259 | next if $self->{pathnames}{$pkg}; |
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| 260 | |
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| 261 | local $@; |
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| 262 | my $new = eval { require $file; $pkg->can('new') }; |
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| 263 | unless ( $new ) { |
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| 264 | warn $@ if $@; |
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| 265 | next; |
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| 266 | } |
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| 267 | $self->{pathnames}{$pkg} = delete $INC{$file}; |
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| 268 | push @{$self->{extensions}}, &{$new}($pkg, _top => $top ); |
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| 269 | } |
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| 270 | |
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| 271 | $self->{extensions} ||= []; |
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| 272 | } |
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| 273 | |
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| 274 | sub find_extensions { |
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| 275 | my ($self, $path) = @_; |
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| 276 | |
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| 277 | my @found; |
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| 278 | File::Find::find( sub { |
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| 279 | my $file = $File::Find::name; |
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| 280 | return unless $file =~ m!^\Q$path\E/(.+)\.pm\Z!is; |
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| 281 | my $subpath = $1; |
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| 282 | return if lc($subpath) eq lc($self->{dispatch}); |
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| 283 | |
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| 284 | $file = "$self->{path}/$subpath.pm"; |
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| 285 | my $pkg = "$self->{name}::$subpath"; |
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| 286 | $pkg =~ s!/!::!g; |
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| 287 | |
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| 288 | # If we have a mixed-case package name, assume case has been preserved |
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| 289 | # correctly. Otherwise, root through the file to locate the case-preserved |
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| 290 | # version of the package name. |
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| 291 | if ( $subpath eq lc($subpath) || $subpath eq uc($subpath) ) { |
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| 292 | my $content = Module::Install::_read($subpath . '.pm'); |
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| 293 | my $in_pod = 0; |
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| 294 | foreach ( split //, $content ) { |
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| 295 | $in_pod = 1 if /^=\w/; |
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| 296 | $in_pod = 0 if /^=cut/; |
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| 297 | next if ($in_pod || /^=cut/); # skip pod text |
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| 298 | next if /^\s*#/; # and comments |
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| 299 | if ( m/^\s*package\s+($pkg)\s*;/i ) { |
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| 300 | $pkg = $1; |
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| 301 | last; |
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| 302 | } |
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| 303 | } |
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| 304 | } |
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| 305 | |
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| 306 | push @found, [ $file, $pkg ]; |
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| 307 | }, $path ) if -d $path; |
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| 308 | |
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| 309 | @found; |
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| 310 | } |
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| 311 | |
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| 312 | |
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| 313 | |
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| 314 | |
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| 315 | |
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| 316 | ##################################################################### |
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| 317 | # Utility Functions |
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| 318 | |
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| 319 | sub _caller { |
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| 320 | my $depth = 0; |
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| 321 | my $call = caller($depth); |
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| 322 | while ( $call eq __PACKAGE__ ) { |
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| 323 | $depth++; |
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| 324 | $call = caller($depth); |
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| 325 | } |
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| 326 | return $call; |
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| 327 | } |
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| 328 | |
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| 329 | sub _read { |
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| 330 | local *FH; |
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| 331 | open FH, "< $_[0]" or die "open($_[0]): $!"; |
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| 332 | my $str = do { local $/; <FH> }; |
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| 333 | close FH or die "close($_[0]): $!"; |
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| 334 | return $str; |
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| 335 | } |
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| 336 | |
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| 337 | sub _write { |
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| 338 | local *FH; |
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| 339 | open FH, "> $_[0]" or die "open($_[0]): $!"; |
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| 340 | foreach ( 1 .. $#_ ) { print FH $_[$_] or die "print($_[0]): $!" } |
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| 341 | close FH or die "close($_[0]): $!"; |
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| 342 | } |
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| 343 | |
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| 344 | # _version is for processing module versions (eg, 1.03_05) not |
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| 345 | # Perl versions (eg, 5.8.1). |
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| 346 | |
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| 347 | sub _version ($) { |
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| 348 | my $s = shift || 0; |
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| 349 | $s =~ s/^(\d+)\.?//; |
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| 350 | my $l = $1 || 0; |
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| 351 | my @v = map { $_ . '0' x (3 - length $_) } $s =~ /(\d{1,3})\D?/g; |
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| 352 | $l = $l . '.' . join '', @v if @v; |
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| 353 | return $l + 0; |
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| 354 | } |
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| 355 | |
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| 356 | # Cloned from Params::Util::_CLASS |
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| 357 | sub _CLASS ($) { |
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| 358 | ( |
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| 359 | defined $_[0] |
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| 360 | and |
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| 361 | ! ref $_[0] |
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| 362 | and |
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| 363 | $_[0] =~ m/^[^\W\d]\w*(?:::\w+)*$/s |
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| 364 | ) ? $_[0] : undef; |
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| 365 | } |
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| 366 | |
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| 367 | 1; |
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| 368 | |
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| 369 | # Copyright 2008 - 2009 Adam Kennedy. |
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