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

    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";

    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}}) {
        return $obj if $obj->can($method);
    }

    my $admin = $self->{admin} or die <<"END_DIE";
The '$method' method does not exist in the '$self->{prefix}' path!
Please remove the '$self->{prefix}' directory and run $0 again to load it.
END_DIE

    my $obj = $admin->load($method, 1);
    push @{$self->{extensions}}, $obj;

    $obj;
}

sub load_extensions {
    my ($self, $path, $top) = @_;

    unless ( grep { lc $_ eq lc $self->{prefix} } @INC ) {
        unshift @INC, $self->{prefix};
    }

    foreach my $rv ( $self->find_extensions($path) ) {
        my ($file, $pkg) = @{$rv};
        next if $self->{pathnames}{$pkg};

        local $@;
        my $new = eval { require $file; $pkg->can('new') };
        unless ( $new ) {
            warn $@ if $@;
            next;
        }
        $self->{pathnames}{$pkg} = delete $INC{$file};
        push @{$self->{extensions}}, &{$new}($pkg, _top => $top );
    }

    $self->{extensions} ||= [];
}

sub find_extensions {
    my ($self, $path) = @_;

    my @found;
    File::Find::find( sub {
        my $file = $File::Find::name;
        return unless $file =~ m!^\Q$path\E/(.+)\.pm\Z!is;
        my $subpath = $1;
        return if lc($subpath) eq lc($self->{dispatch});

        $file = "$self->{path}/$subpath.pm";
        my $pkg = "$self->{name}::$subpath";
        $pkg =~ s!/!::!g;

        # If we have a mixed-case package name, assume case has been preserved
        # correctly.  Otherwise, root through the file to locate the case-preserved
        # version of the package name.
        if ( $subpath eq lc($subpath) || $subpath eq uc($subpath) ) {
            open PKGFILE, "<$subpath.pm" or die "find_extensions: Can't open $subpath.pm: $!";
            my $in_pod = 0;
            while ( <PKGFILE> ) {
                $in_pod = 1 if /^=\w/;
                $in_pod = 0 if /^=cut/;
                next if ($in_pod || /^=cut/);  # skip pod text
                next if /^\s*#/;               # and comments
                if ( m/^\s*package\s+($pkg)\s*;/i ) {
                    $pkg = $1;
                    last;
                }
            }
            close PKGFILE;
        }

        push @found, [ $file, $pkg ];
    }, $path ) if -d $path;

    @found;
}

sub _caller {
    my $depth = 0;
    my $call  = caller($depth);
    while ( $call eq __PACKAGE__ ) {
        $depth++;
        $call = caller($depth);
    }
    return $call;
}