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inc/Module/Install.pm  view on Meta::CPAN

sub autoload {
	my $self = shift;
	my $who  = $self->_caller;
	my $cwd  = Cwd::cwd();
	my $sym  = "${who}::AUTOLOAD";
	$sym->{$cwd} = sub {
		my $pwd = Cwd::cwd();
		if ( my $code = $sym->{$pwd} ) {
			# delegate back to parent dirs
			goto &$code unless $cwd eq $pwd;
		}
		$$sym =~ /([^:]+)$/ or die "Cannot autoload $who - $sym";
		unless ( uc($1) eq $1 ) {
			unshift @_, ( $self, $1 );
			goto &{$self->can('call')};
		}
	};
}

sub import {
	my $class = shift;
	my $self  = $class->new(@_);
	my $who   = $self->_caller;

	unless ( -f $self->{file} ) {
		require "$self->{path}/$self->{dispatch}.pm";
		File::Path::mkpath("$self->{prefix}/$self->{author}");
		$self->{admin} = "$self->{name}::$self->{dispatch}"->new( _top => $self );
		$self->{admin}->init;
		@_ = ($class, _self => $self);
		goto &{"$self->{name}::import"};
	}

	*{"${who}::AUTOLOAD"} = $self->autoload;
	$self->preload;

	# Unregister loader and worker packages so subdirs can use them again
	delete $INC{"$self->{file}"};
	delete $INC{"$self->{path}.pm"};

	return 1;
}

sub preload {
	my $self = shift;
	unless ( $self->{extensions} ) {
		$self->load_extensions(
			"$self->{prefix}/$self->{path}", $self
		);
	}

	my @exts = @{$self->{extensions}};
	unless ( @exts ) {
		my $admin = $self->{admin};
		@exts = $admin->load_all_extensions;
	}

	my %seen;
	foreach my $obj ( @exts ) {
		while (my ($method, $glob) = each %{ref($obj) . '::'}) {
			next unless $obj->can($method);
			next if $method =~ /^_/;
			next if $method eq uc($method);
			$seen{$method}++;
		}
	}

	my $who = $self->_caller;
	foreach my $name ( sort keys %seen ) {
		*{"${who}::$name"} = sub {
			${"${who}::AUTOLOAD"} = "${who}::$name";
			goto &{"${who}::AUTOLOAD"};
		};
	}
}

sub new {
	my ($class, %args) = @_;

	# ignore the prefix on extension modules built from top level.
	my $base_path = Cwd::abs_path($FindBin::Bin);
	unless ( Cwd::abs_path(Cwd::cwd()) eq $base_path ) {
		delete $args{prefix};
	}

	return $args{_self} if $args{_self};

	$args{dispatch} ||= 'Admin';
	$args{prefix}   ||= 'inc';
	$args{author}   ||= ($^O eq 'VMS' ? '_author' : '.author');
	$args{bundle}   ||= 'inc/BUNDLES';
	$args{base}     ||= $base_path;
	$class =~ s/^\Q$args{prefix}\E:://;
	$args{name}     ||= $class;
	$args{version}  ||= $class->VERSION;
	unless ( $args{path} ) {
		$args{path}  = $args{name};
		$args{path}  =~ s!::!/!g;
	}
	$args{file}     ||= "$args{base}/$args{prefix}/$args{path}.pm";
	$args{wrote}      = 0;

	bless( \%args, $class );
}

sub call {
	my ($self, $method) = @_;
	my $obj = $self->load($method) or return;
        splice(@_, 0, 2, $obj);
	goto &{$obj->can($method)};
}

sub load {
	my ($self, $method) = @_;

	$self->load_extensions(
		"$self->{prefix}/$self->{path}", $self
	) unless $self->{extensions};

	foreach my $obj (@{$self->{extensions}}) {