manakai/bin/daf.pl

#!/usr/bin/perl -w 
use strict;
use Message::Util::QName::Filter {
  c => q<http://suika.fam.cx/~wakaba/archive/2004/8/18/dom-core#>,
  DIS => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/DIS#>,
  dis => q<http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#dis-->,
  dp => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/DIS#Perl/>,
  fe => q<http://suika.fam.cx/www/2006/feature/>,
  ManakaiDOM => q<http://suika.fam.cx/~wakaba/archive/2004/8/18/manakai-dom#>,
  pc => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/PerlCode#>,
  swcfg21 => q<http://suika.fam.cx/~wakaba/archive/2005/swcfg21#>,
  Util => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/>,
};

our$VERSION=do{my @r=(q$Revision: 1.17 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
use Cwd;
use Getopt::Long;
use Pod::Usage;
our %Opt = (create_module => []);
my @target_modules;
GetOptions (
  'create-dtd-driver=s' => sub {
    shift;
    my $i = [split /\s+/, shift, 3];
    $i->[3] = 'dtd-driver';
    push @{$Opt{create_module}}, $i;
  },
  'create-dtd-modules=s' => sub {
    shift;
    my $i = [split /\s+/, shift, 3];
    $i->[3] = 'dtd-modules';
    push @{$Opt{create_module}}, $i;
  },
  'create-perl-module=s' => sub {
    shift;
    my $i = [split /\s+/, shift, 3];
    $i->[3] = 'perl-pm';
    push @{$Opt{create_module}}, $i;
    push @target_modules, [$i->[0], $i->[2]];
  },
  'create-perl-test=s' => sub {
    shift;
    my $i = [split /\s+/, shift, 3];
    $i->[3] = 'perl-t';
    push @{$Opt{create_module}}, $i;
    push @target_modules, [$i->[0], $i->[2]];
  },
  'debug' => \$Opt{debug},
  'dis-file-suffix=s' => \$Opt{dis_suffix},
  'daem-file-suffix=s' => \$Opt{daem_suffix},
  'dafs-file-suffix=s' => \$Opt{dafs_suffix},
  'dafx-file-suffix=s' => \$Opt{dafx_suffix},
  'dtd-file-suffix=s' => \$Opt{dtd_suffix},
  'help' => \$Opt{help},
  'load-module=s' => sub {
    shift;
    my $i = [split /\s+/, shift, 2];
    push @target_modules, [$i->[0], $i->[1]];
  },
  'mod-file-suffix=s' => \$Opt{mod_suffix},
  'search-path|I=s' => sub {
    shift;
    my @value = split /\s+/, shift;
    while (my ($ns, $path) = splice @value, 0, 2, ()) {
      unless (defined $path) {
        die qq[$0: Search-path parameter without path: "$ns"];
      }
      push @{$Opt{input_search_path}->{$ns} ||= []}, $path;
    }
  },
  'search-path-catalog-file-name=s' => sub {
    shift;
    require File::Spec;
    my $path = my $path_base = shift;
    $path_base =~ s#[^/]+$##;
    $Opt{search_path_base} = $path_base;
    open my $file, '<', $path or die "$0: $path: $!";
    while (<$file>) {
      if (s/^\s*\@//) {     ## Processing instruction
        my ($target, $data) = split /\s+/;
        if ($target eq 'base') {
          $Opt{search_path_base} = File::Spec->rel2abs ($data, $path_base);
        } else {
          die "$0: $target: Unknown target";
        }
      } elsif (/^\s*\#/) {  ## Comment
        #
      } elsif (/\S/) {      ## Catalog entry
        s/^\s+//;
        my ($ns, $path) = split /\s+/;
        push @{$Opt{input_search_path}->{$ns} ||= []},
             File::Spec->rel2abs ($path, $Opt{search_path_base});
      }
    }
    ## NOTE: File paths with SPACEs are not supported
    ## NOTE: Future version might use file: URI instead of file path.
  },
  'undef-check!' => \$Opt{no_undef_check},
  'verbose!' => \$Opt{verbose},
) or pod2usage (2);
pod2usage ({-exitval => 0, -verbose => 1}) if $Opt{help};
$Opt{no_undef_check} = defined $Opt{no_undef_check}
                         ? $Opt{no_undef_check} ? 0 : 1 : 0;
$Opt{dis_suffix} = '.dis' unless defined $Opt{dis_suffix};
$Opt{daem_suffix} = '.dafm' unless defined $Opt{daem_suffix};
$Opt{dafx_suffix} = '.dafx' unless defined $Opt{dafx_suffix};
$Opt{dafs_suffix} = '.dafs' unless defined $Opt{dafs_suffix};
$Opt{dtd_suffix} = '.dtd' unless defined $Opt{dtd_suffix};
$Opt{mod_suffix} = '.mod' unless defined $Opt{mod_suffix};
require Error;
$Error::Debug = 1 if $Opt{debug};
$Message::Util::Error::VERBOSE = 1 if $Opt{verbose};

sub status_msg ($) {
  my $s = shift;
  $s .= "\n" unless $s =~ /\n$/;
  print STDERR $s;
}

sub status_msg_ ($) {
  my $s = shift;
  print STDERR $s;
}

sub verbose_msg ($) {
  my $s = shift;
  $s .= "\n" unless $s =~ /\n$/;
  print STDERR $s if $Opt{verbose};
}

sub verbose_msg_ ($) {
  my $s = shift;
  print STDERR $s if $Opt{verbose};
}

## ---- The MAIN Program

my $start_time;
BEGIN { $start_time = time }

use Message::Util::DIS::DNLite;

my %feature;

for (@{$Opt{create_module}}) {
  my (undef, undef, undef, $out_type) = @$_;

  if ($out_type eq 'perl-pm') {
    require 'manakai/daf-perl-pm.pl';
    $feature{'+' . ExpandedURI q<Util:PerlCode>} = '1.0';
  } elsif ($out_type eq 'perl-t') {
    require 'manakai/daf-perl-t.pl';
    $feature{ExpandedURI q<fe:GenericLS>} = '3.0';
    $feature{'+' . ExpandedURI q<DIS:TDT>} = '1.0';
    $feature{'+' . ExpandedURI q<Util:PerlCode>} = '1.0';
  } elsif ($out_type eq 'dtd-modules') {
    require 'manakai/daf-dtd-modules.pl';
    $feature{ExpandedURI q<fe:GenericLS>} = '3.0';
    $feature{'+' . ExpandedURI q<fe:XDP>} = '3.0';
  } elsif ($out_type eq 'dtd-driver') {
    require 'manakai/daf-dtd-modules.pl';
    $feature{ExpandedURI q<fe:GenericLS>} = '3.0';
    $feature{'+' . ExpandedURI q<fe:XDP>} = '3.0';
  }
}

our $limpl = $Message::DOM::ImplementationRegistry->get_implementation
                           ({ExpandedURI q<fe:Min> => '3.0',
                             '+' . ExpandedURI q<DIS:DNLite> => '1.0',
                             '+' . ExpandedURI q<DIS:Core> => '1.0',
                             %feature,
                           });
our $impl = $limpl->get_feature (ExpandedURI q<DIS:Core> => '1.0');

## --- Loading and Updating the Database

my $HasError;
our $db = $impl->create_dis_database;
$db->pl_database_module_resolver (\&daf_db_module_resolver);
$db->dom_config->set_parameter ('error-handler' => \&daf_on_error);

my $parser = $impl->create_dis_parser;
my $DNi = $impl->get_feature (ExpandedURI q<DIS:DNLite> => '1.0');
my %ModuleSourceDISDocument;
my %ModuleSourceDNLDocument;
my %ModuleNameNamespaceBinding = (
  DISCore => q<http://suika.fam.cx/~wakaba/archive/2004/dis/Core#>,
    ## This builtin binding is required since
    ## some module has |DISCore:author| property before |dis:Require|
    ## property.
);

my $ResourceCount = 0;
$db->pl_update_module (\@target_modules,
get_module_index_file_name => sub {
  shift; # $db
  daf_get_module_index_file_name (@_);
},
get_module_source_document_from_uri => sub {
  my ($db, $module_uri, $module_for) = @_;
  status_msg '';
  status_msg qq<Loading module <$module_uri> for <$module_for>...>;
  $ResourceCount = 0;

  unless (defined $ModuleSourceDNLDocument{$module_uri}) {
    unless (defined $ModuleSourceDISDocument{$module_uri}) {
      daf_open_source_dis_document ($module_uri);
    }
    daf_convert_dis_document_to_dnl_document ();
  }
  return $ModuleSourceDNLDocument{$module_uri};
},
get_module_source_document_from_resource => sub ($$$$$$) {
  my ($self, $db, $uri, $ns, $ln, $for) = @_;
  status_msg '';
  status_msg qq<Loading module "$ln" for <$for>...>;
  $ResourceCount = 0;

  my $module_uri = $ns.$ln;
  unless (defined $ModuleSourceDNLDocument{$module_uri}) {
    unless (defined $ModuleSourceDISDocument{$module_uri}) {
      daf_open_source_dis_document ($module_uri);
    }
    daf_convert_dis_document_to_dnl_document ();
  }
  return $ModuleSourceDNLDocument{$module_uri};
},
get_module_source_revision => sub {
  my ($db, $module_uri) = @_;
  my $ns = $module_uri;
  $ns =~ s/(\w+)\z//;
  my $ln = $1;

  my $name = dac_search_file_path_stem ($ns, $ln, $Opt{dis_suffix});
  if (defined $name) {
    return [stat $name.$Opt{dis_suffix}]->[9];
  } else {
    return 0;
  }
},
get_referring_module_uri_list => sub {
  my ($db, $module_uri) = @_;
  unless (defined $ModuleSourceDNLDocument{$module_uri}) {
    unless (defined $ModuleSourceDISDocument{$module_uri}) {
      daf_open_source_dis_document ($module_uri);
    }
  }
  return daf_get_referring_module_uri_list ($module_uri);
},
on_resource_read => sub ($$) {
  if ((++$ResourceCount % 10) == 0) {
    status_msg_ "*";
    status_msg_ " " if ($ResourceCount % (10 * 10)) == 0;
    status_msg '' if ($ResourceCount % (10 * 50)) == 0;
  }
});


## Removes reference from document to database
our @Document;
for my $dis (@Document) {
  $dis->unlink_from_document;
  $dis->dis_database (undef);
}

status_msg '';

status_msg qq<Reading properties...>;
$ResourceCount = 0;
$db->read_properties (on_resource_read => sub ($$) {
  if ((++$ResourceCount % 10) == 0) {
    status_msg_ "*";
    status_msg_ " " if ($ResourceCount % (10 * 10)) == 0;
    status_msg '' if ($ResourceCount % (10 * 50)) == 0;
  }
}, implementation => $impl);
status_msg '';
status_msg "done";

status_msg_ qq<Writing database files...>;
$db->pl_store ('dummy', sub ($$) {
  my ($db, $mod, $type) = @_;
  my $ns = $mod->namespace_uri;
  my $ln = $mod->local_name;
  my $suffix = $type eq ExpandedURI q<dp:ModuleIndexFile>
                 ? $Opt{dafx_suffix} : $Opt{daem_suffix};
  my $name = dac_search_file_path_stem ($ns, $ln, $suffix);
  if (defined $name) {
    $name .= $suffix;
  } elsif (defined ($name = dac_search_file_path_stem
                              ($ns, $ln, $Opt{dis_suffix}))) {
    $name .= $suffix;
  } else {
    $name = Cwd::abs_path
              (File::Spec->canonpath
                 (File::Spec->catfile
                    (defined $Opt{input_search_path}->{$ns}->[0]
                       ? $Opt{input_search_path}->{$ns}->[0] : '.',
                     $ln.$suffix)));
  }
  verbose_msg qq<Database >.
              ($type eq <Q::dp|ModuleIndexFile> ? 'index' : 'module').
              qq< <$ns$ln> is written to "$name">;
  return $name;
}, no_main_database => 1);
status_msg "done";

daf_check_undefined ();

undef $DNi;
undef %ModuleSourceDNLDocument;
exit $HasError if $HasError;

## --- Creating Files

for (@{$Opt{create_module}}) {
  my ($mod_uri, $out_file_path, $mod_for, $out_type) = @$_;

  if ($out_type eq 'perl-pm') {
    daf_perl_pm ($mod_uri, $out_file_path, $mod_for);
  } elsif ($out_type eq 'perl-t') {
    daf_perl_t ($mod_uri, $out_file_path, $mod_for);
  } elsif ($out_type eq 'dtd-modules') {
    daf_dtd_modules ($mod_uri, $out_file_path, $mod_for);
  } elsif ($out_type eq 'dtd-driver') {
    daf_dtd_driver ($mod_uri, $out_file_path, $mod_for);
  }
}

daf_check_undefined ();

## --- The END

status_msg_ "Closing the database...";
$db->free;
undef $db;
status_msg "done";

undef $limpl;
undef $impl;

{
  use integer;
  my $time = time - $start_time;
  status_msg sprintf qq<%d'%02d''>, $time / 60, $time % 60;
}
exit $HasError;

END {
  $db->free if $db;
}

## ---- Subroutines

sub daf_open_source_dis_document ($) {
  my ($module_uri) = @_;

  ## -- Finds |dis| source file
  my $ns = $module_uri;
  $ns =~ s/(\w+)\z//;
  my $ln = $1;
  my $file_name = dac_search_file_path_stem ($ns, $ln, $Opt{dis_suffix});
  unless (defined $file_name) {
    die "$0: Source file for <$ns$ln> is not found";
  }
  $file_name .= $Opt{dis_suffix};

  status_msg_ qq<Opening dis source file "$file_name"...>;

  ## -- Opens |dis| file and construct |DISDocument| tree
  open my $file, '<', $file_name or die "$0: $file_name: $!";
  my $dis = $parser->parse ({character_stream => $file});
  require File::Spec;
  $dis->flag (ExpandedURI q<swcfg21:fileName> =>
                  File::Spec->abs2rel ($file_name));
  $dis->dis_namespace_resolver (\&daf_module_name_namespace_resolver);
  close $file;

  ## -- Registers namespace URI
  my $mod = $dis->module_element;
  if ($mod) {
    my $qn = $mod->get_attribute_ns (ExpandedURI q<dis:>, 'QName');
    if ($qn) {
      my $prefix = $qn->value;
      $prefix =~ s/^[^:|]*[:|]\s*//;
      $prefix =~ s/\s+$//;
      unless (defined $ModuleNameNamespaceBinding{$prefix}) {
        $ModuleNameNamespaceBinding{$prefix} = $mod->defining_namespace_uri;
      }
    }
  }

  $ModuleSourceDISDocument{$module_uri} = $dis;
  status_msg q<done>;

  R: for (@{daf_get_referring_module_uri_list ($module_uri)}) {
    next R if defined $db->{modDef}->{$_};
    next R if defined $ModuleSourceDNLDocument{$_};
    next R if defined $ModuleSourceDISDocument{$_};
    my $idx_file_name = daf_get_module_index_file_name ($_);
    if (-f $idx_file_name) {
      daf_open_current_module_index ($_, $idx_file_name);
    } else {
      daf_open_source_dis_document ($_);
    }
  }
} # daf_open_source_dis_document

sub daf_open_current_module_index ($$) {
  my ($module_uri, $file_name) = @_;
  $db->pl_load_dis_database_index ($file_name);

  R: for (@{$db->get_module ($module_uri)
               ->get_referring_module_uri_list}) {
    next R if defined $db->{modDef}->{$_};
    next R if defined $ModuleSourceDNLDocument{$_};
    next R if defined $ModuleSourceDISDocument{$_};
    my $idx_file_name = daf_get_module_index_file_name ($_);
    if (-f $idx_file_name) {
      daf_open_current_module_index ($_, $idx_file_name);
    } else {
      daf_open_source_dis_document ($_);
    }
  }
} # daf_open_current_module_index

sub daf_convert_dis_document_to_dnl_document () {
  M: for my $module_uri (keys %ModuleSourceDISDocument) {
    my $dis_doc = $ModuleSourceDISDocument{$module_uri};
    next M unless $dis_doc;
    verbose_msg_ qq<Converting <$module_uri>...>;
    my $dnl_doc = $DNi->convert_dis_document_to_dnl_document
                          ($dis_doc, database_arg => $db,
                           base_namespace_binding =>
                             {(map {$_->local_name => $_->target_namespace_uri}
                               grep {$_} values %{$db->{modDef}}),
                              %ModuleNameNamespaceBinding});
    push @Document, $dnl_doc;
    $ModuleSourceDNLDocument{$module_uri} = $dnl_doc;
    $dis_doc->free;
    delete $ModuleSourceDISDocument{$module_uri};
    verbose_msg q<done>;
  }
} # daf_convert_dis_document_to_dnl_document

sub daf_get_referring_module_uri_list ($) {
  my $module_uri = shift;
  my $ns = $module_uri;
  $ns =~ s/\w+\z//;
  my $src = $ModuleSourceDNLDocument{$module_uri};
  $src = $ModuleSourceDISDocument{$module_uri} unless defined $src;
  my $mod_el = $src->module_element;
  my $r = [];
  if ($mod_el) {
    my $req_el = $mod_el->require_element;
    if ($req_el) {
      M: for my $m_el (@{$req_el->child_nodes}) {
        next M unless $m_el->node_type eq '#element';
        next M unless $m_el->expanded_uri eq ExpandedURI q<dis:Module>;
        my $qn_el = $m_el->get_attribute_ns (ExpandedURI q<dis:>, 'QName');
        if ($qn_el) {
          push @$r, $qn_el->qname_value_uri;
        } else {
          my $n_el = $m_el->get_attribute_ns (ExpandedURI q<dis:>, 'Name');
          if ($n_el) {
            push @$r, $ns.$n_el->value;
          } else {
            # The module itself
          }
        }
      }
    }
  }
  return $r;
} # daf_get_referring_module_uri_list

sub dac_search_file_path_stem ($$$) {
  my ($ns, $ln, $suffix) = @_;
  require File::Spec;
  for my $dir (@{$Opt{input_search_path}->{$ns}||[]}) {
    my $name = Cwd::abs_path
        (File::Spec->canonpath
         (File::Spec->catfile ($dir, $ln)));
    if (-f $name.$suffix) {
      return $name;
    }
  }
  return undef;
} # dac_search_file_path_stem;

sub daf_get_module_index_file_name ($$) {
  my ($module_uri) = @_;
  my $ns = $module_uri;
  $ns =~ s/(\w+)\z//;
  my $ln = $1;

  verbose_msg qq<Database module index <$module_uri> is requested>;
  my $suffix = $Opt{dafx_suffix};
  my $name = dac_search_file_path_stem ($ns, $ln, $suffix);
  if (defined $name) {
    $name .= $suffix;
  } elsif (defined ($name = dac_search_file_path_stem
                              ($ns, $ln, $Opt{dis_suffix}))) {
    $name .= $suffix;
  } else {
    $name = Cwd::abs_path
              (File::Spec->canonpath
                 (File::Spec->catfile
                    (defined $Opt{input_search_path}->{$ns}->[0]
                       ? $Opt{input_search_path}->{$ns}->[0] : '.',
                     $ln.$suffix)));
  }
  return $name;  
} # daf_get_module_index_file_name

sub daf_module_name_namespace_resolver ($) {
  my $prefix = shift;

  ## -- From modules in database
  M: for (values %{$db->{modDef}}) {
    my $mod = $_;
    next M unless defined $mod;
    if ($mod->local_name eq $prefix) {
      return $mod->target_namespace_uri;
    }
  }

  ## -- From not-in-database-yet module list
  if (defined $ModuleNameNamespaceBinding{$prefix}) {
    return $ModuleNameNamespaceBinding{$prefix};
  }
  return undef;
} # daf_module_name_namespace_resolver

sub daf_db_module_resolver ($$$) {
  my ($db, $mod, $type) = @_;
  my $ns = $mod->namespace_uri;
  my $ln = $mod->local_name;
  my $suffix = {
    ExpandedURI q<dp:ModuleIndexFile> => $Opt{dafx_suffix},
    ExpandedURI q<dp:ModuleResourceFile> => $Opt{daem_suffix},
    ExpandedURI q<dp:ModuleNodeStorageFile> => $Opt{dafs_suffix},
  }->{$type} or die "Unsupported type: <$type>";
  verbose_msg qq<Database module <$ns$ln> is requested>;
  my $name = dac_search_file_path_stem ($ns, $ln, $suffix);
  if (defined $name) {
    return $name.$suffix;
  } else {
    return undef;
  }
} # daf_db_module_resolver

sub daf_on_error ($$) {
  my ($self, $err) = @_;
  if ($err->severity == $err->SEVERITY_WARNING) {
    my $info = ExpandedURI q<dp:info>;
    if ($err->type =~ /\Q$info\E/) {
      my $msg = $err->text;
      if ($msg =~ /\.\.\.\z/) {
        verbose_msg_ $msg;
      } else {
        verbose_msg $msg;
      }
    } else {
      my $msg = $err->text;
      if ($msg =~ /\.\.\.\z/) {
        status_msg_ $msg;
      } else {
        status_msg $msg;
      }
    }
  } else {
    warn $err;
    $HasError = 1;
  }
} # daf_on_error

sub daf_check_undefined () {
  unless ($Opt{no_undef_check}) {
    status_msg_ "Checking undefined resources...";
    $db->check_undefined_resource;
    print STDERR "done\n";
  }
} # daf_check_undefined

__END__

=head1 NAME

dac.pl - Creating "dac" Database File from "dis" Source Files

=head1 SYNOPSIS

  perl path/to/dac.pl [--input-db-file-name=input.dac] \
                      --output-file-name=out.dac [options...] \
                      input.dis
  perl path/to/dac.pl --help

=head1 DESCRIPTION

This script, C<dac.pl>, compiles "dis" source files into "dac"
database file.  The generated database file can be used
in turn to generate Perl module file, for example, by another
script C<dac2pm.pl> or can be used to create larger database
by specifying its file name as the C<--input-db-file-name>
argument of another C<dac.pl> execution.

This script is part of manakai.

=head1 OPTIONS

=over 4

=item I<input.dis> (Required)

The unnamed option specifies a file name path of the source "dis" file
from which a database is created.  This option is required.

=item C<--input-db-file-name=I<file-name>> (Default: none)

A file path of the base database.  This option is optional; if this
option is specified, the database file is loaded first
and then I<input.dis> file is loaded in the context of it.
Otherwise, a new database is created.

=back

=head1 SEE ALSO

L<lib/Message/Util/DIS.dis> - The actual implementation
of the "dis" interpretation.

=head1 LICENSE

Copyright 2004-2006 Wakaba <w@suika.fam.cx>.  All rights reserved.

This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.

=cut
1	wakaba	1.1	#!/usr/bin/perl -w
2			use strict;
3			use Message::Util::QName::Filter {
4	wakaba	1.2	c => q<http://suika.fam.cx/~wakaba/archive/2004/8/18/dom-core#>,
5	wakaba	1.1	DIS => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/DIS#>,
6			dis => q<http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#dis-->,
7			dp => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/DIS#Perl/>,
8			fe => q<http://suika.fam.cx/www/2006/feature/>,
9			ManakaiDOM => q<http://suika.fam.cx/~wakaba/archive/2004/8/18/manakai-dom#>,
10	wakaba	1.2	pc => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/PerlCode#>,
11	wakaba	1.1	swcfg21 => q<http://suika.fam.cx/~wakaba/archive/2005/swcfg21#>,
12			Util => q<http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/>,
13			};
14
15	wakaba	1.18	our$VERSION=do{my @r=(q$Revision: 1.17 $=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
16	wakaba	1.1	use Cwd;
17			use Getopt::Long;
18			use Pod::Usage;
19	wakaba	1.15	our %Opt = (create_module => []);
20	wakaba	1.14	my @target_modules;
21	wakaba	1.1	GetOptions (
22	wakaba	1.17	'create-dtd-driver=s' => sub {
23			shift;
24			my $i = [split /\s+/, shift, 3];
25			$i->[3] = 'dtd-driver';
26			push @{$Opt{create_module}}, $i;
27			},
28	wakaba	1.14	'create-dtd-modules=s' => sub {
29			shift;
30			my $i = [split /\s+/, shift, 3];
31			$i->[3] = 'dtd-modules';
32			push @{$Opt{create_module}}, $i;
33			},
34	wakaba	1.1	'create-perl-module=s' => sub {
35			shift;
36			my $i = [split /\s+/, shift, 3];
37	wakaba	1.2	$i->[3] = 'perl-pm';
38			push @{$Opt{create_module}}, $i;
39	wakaba	1.14	push @target_modules, [$i->[0], $i->[2]];
40	wakaba	1.2	},
41			'create-perl-test=s' => sub {
42			shift;
43			my $i = [split /\s+/, shift, 3];
44			$i->[3] = 'perl-t';
45	wakaba	1.1	push @{$Opt{create_module}}, $i;
46	wakaba	1.14	push @target_modules, [$i->[0], $i->[2]];
47	wakaba	1.1	},
48			'debug' => \$Opt{debug},
49			'dis-file-suffix=s' => \$Opt{dis_suffix},
50			'daem-file-suffix=s' => \$Opt{daem_suffix},
51	wakaba	1.11	'dafs-file-suffix=s' => \$Opt{dafs_suffix},
52	wakaba	1.1	'dafx-file-suffix=s' => \$Opt{dafx_suffix},
53	wakaba	1.17	'dtd-file-suffix=s' => \$Opt{dtd_suffix},
54	wakaba	1.1	'help' => \$Opt{help},
55	wakaba	1.14	'load-module=s' => sub {
56			shift;
57			my $i = [split /\s+/, shift, 2];
58			push @target_modules, [$i->[0], $i->[1]];
59			},
60	wakaba	1.15	'mod-file-suffix=s' => \$Opt{mod_suffix},
61	wakaba	1.1	'search-path\|I=s' => sub {
62			shift;
63			my @value = split /\s+/, shift;
64			while (my ($ns, $path) = splice @value, 0, 2, ()) {
65			unless (defined $path) {
66			die qq[$0: Search-path parameter without path: "$ns"];
67			}
68			push @{$Opt{input_search_path}->{$ns} \|\|= []}, $path;
69			}
70			},
71			'search-path-catalog-file-name=s' => sub {
72			shift;
73			require File::Spec;
74			my $path = my $path_base = shift;
75			$path_base =~ s#[^/]+$##;
76			$Opt{search_path_base} = $path_base;
77			open my $file, '<', $path or die "$0: $path: $!";
78			while (<$file>) {
79			if (s/^\s*\@//) { ## Processing instruction
80			my ($target, $data) = split /\s+/;
81			if ($target eq 'base') {
82			$Opt{search_path_base} = File::Spec->rel2abs ($data, $path_base);
83			} else {
84			die "$0: $target: Unknown target";
85			}
86			} elsif (/^\s*\#/) { ## Comment
87			#
88			} elsif (/\S/) { ## Catalog entry
89			s/^\s+//;
90			my ($ns, $path) = split /\s+/;
91			push @{$Opt{input_search_path}->{$ns} \|\|= []},
92			File::Spec->rel2abs ($path, $Opt{search_path_base});
93			}
94			}
95			## NOTE: File paths with SPACEs are not supported
96			## NOTE: Future version might use file: URI instead of file path.
97			},
98			'undef-check!' => \$Opt{no_undef_check},
99			'verbose!' => \$Opt{verbose},
100			) or pod2usage (2);
101			pod2usage ({-exitval => 0, -verbose => 1}) if $Opt{help};
102			$Opt{no_undef_check} = defined $Opt{no_undef_check}
103			? $Opt{no_undef_check} ? 0 : 1 : 0;
104			$Opt{dis_suffix} = '.dis' unless defined $Opt{dis_suffix};
105			$Opt{daem_suffix} = '.dafm' unless defined $Opt{daem_suffix};
106			$Opt{dafx_suffix} = '.dafx' unless defined $Opt{dafx_suffix};
107	wakaba	1.11	$Opt{dafs_suffix} = '.dafs' unless defined $Opt{dafs_suffix};
108	wakaba	1.17	$Opt{dtd_suffix} = '.dtd' unless defined $Opt{dtd_suffix};
109	wakaba	1.15	$Opt{mod_suffix} = '.mod' unless defined $Opt{mod_suffix};
110	wakaba	1.1	require Error;
111			$Error::Debug = 1 if $Opt{debug};
112			$Message::Util::Error::VERBOSE = 1 if $Opt{verbose};
113
114			sub status_msg ($) {
115			my $s = shift;
116			$s .= "\n" unless $s =~ /\n$/;
117			print STDERR $s;
118			}
119
120			sub status_msg_ ($) {
121			my $s = shift;
122			print STDERR $s;
123			}
124
125			sub verbose_msg ($) {
126			my $s = shift;
127			$s .= "\n" unless $s =~ /\n$/;
128			print STDERR $s if $Opt{verbose};
129			}
130
131			sub verbose_msg_ ($) {
132			my $s = shift;
133			print STDERR $s if $Opt{verbose};
134			}
135
136	wakaba	1.2	## ---- The MAIN Program
137
138	wakaba	1.1	my $start_time;
139			BEGIN { $start_time = time }
140
141			use Message::Util::DIS::DNLite;
142	wakaba	1.5
143			my %feature;
144	wakaba	1.1
145	wakaba	1.13	for (@{$Opt{create_module}}) {
146			my (undef, undef, undef, $out_type) = @$_;
147
148			if ($out_type eq 'perl-pm') {
149			require 'manakai/daf-perl-pm.pl';
150			$feature{'+' . ExpandedURI q<Util:PerlCode>} = '1.0';
151			} elsif ($out_type eq 'perl-t') {
152			require 'manakai/daf-perl-t.pl';
153			$feature{ExpandedURI q<fe:GenericLS>} = '3.0';
154			$feature{'+' . ExpandedURI q<DIS:TDT>} = '1.0';
155			$feature{'+' . ExpandedURI q<Util:PerlCode>} = '1.0';
156	wakaba	1.14	} elsif ($out_type eq 'dtd-modules') {
157			require 'manakai/daf-dtd-modules.pl';
158			$feature{ExpandedURI q<fe:GenericLS>} = '3.0';
159			$feature{'+' . ExpandedURI q<fe:XDP>} = '3.0';
160	wakaba	1.17	} elsif ($out_type eq 'dtd-driver') {
161			require 'manakai/daf-dtd-modules.pl';
162			$feature{ExpandedURI q<fe:GenericLS>} = '3.0';
163			$feature{'+' . ExpandedURI q<fe:XDP>} = '3.0';
164	wakaba	1.13	}
165			}
166
167			our $limpl = $Message::DOM::ImplementationRegistry->get_implementation
168	wakaba	1.1	({ExpandedURI q<fe:Min> => '3.0',
169			'+' . ExpandedURI q<DIS:DNLite> => '1.0',
170			'+' . ExpandedURI q<DIS:Core> => '1.0',
171	wakaba	1.5	%feature,
172	wakaba	1.1	});
173	wakaba	1.13	our $impl = $limpl->get_feature (ExpandedURI q<DIS:Core> => '1.0');
174	wakaba	1.2
175			## --- Loading and Updating the Database
176	wakaba	1.1
177			my $HasError;
178	wakaba	1.13	our $db = $impl->create_dis_database;
179	wakaba	1.1	$db->pl_database_module_resolver (\&daf_db_module_resolver);
180			$db->dom_config->set_parameter ('error-handler' => \&daf_on_error);
181
182	wakaba	1.2	my $parser = $impl->create_dis_parser;
183			my $DNi = $impl->get_feature (ExpandedURI q<DIS:DNLite> => '1.0');
184	wakaba	1.1	my %ModuleSourceDISDocument;
185			my %ModuleSourceDNLDocument;
186			my %ModuleNameNamespaceBinding = (
187			DISCore => q<http://suika.fam.cx/~wakaba/archive/2004/dis/Core#>,
188			## This builtin binding is required since
189			## some module has \|DISCore:author\| property before \|dis:Require\|
190			## property.
191			);
192
193			my $ResourceCount = 0;
194			$db->pl_update_module (\@target_modules,
195			get_module_index_file_name => sub {
196			shift; # $db
197			daf_get_module_index_file_name (@_);
198			},
199			get_module_source_document_from_uri => sub {
200			my ($db, $module_uri, $module_for) = @_;
201			status_msg '';
202			status_msg qq<Loading module <$module_uri> for <$module_for>...>;
203			$ResourceCount = 0;
204
205			unless (defined $ModuleSourceDNLDocument{$module_uri}) {
206			unless (defined $ModuleSourceDISDocument{$module_uri}) {
207			daf_open_source_dis_document ($module_uri);
208			}
209			daf_convert_dis_document_to_dnl_document ();
210			}
211			return $ModuleSourceDNLDocument{$module_uri};
212			},
213			get_module_source_document_from_resource => sub ($$$$$$) {
214			my ($self, $db, $uri, $ns, $ln, $for) = @_;
215			status_msg '';
216			status_msg qq<Loading module "$ln" for <$for>...>;
217			$ResourceCount = 0;
218
219			my $module_uri = $ns.$ln;
220			unless (defined $ModuleSourceDNLDocument{$module_uri}) {
221			unless (defined $ModuleSourceDISDocument{$module_uri}) {
222			daf_open_source_dis_document ($module_uri);
223			}
224			daf_convert_dis_document_to_dnl_document ();
225			}
226			return $ModuleSourceDNLDocument{$module_uri};
227			},
228			get_module_source_revision => sub {
229			my ($db, $module_uri) = @_;
230			my $ns = $module_uri;
231			$ns =~ s/(\w+)\z//;
232			my $ln = $1;
233
234			my $name = dac_search_file_path_stem ($ns, $ln, $Opt{dis_suffix});
235			if (defined $name) {
236			return [stat $name.$Opt{dis_suffix}]->[9];
237			} else {
238			return 0;
239			}
240			},
241			get_referring_module_uri_list => sub {
242			my ($db, $module_uri) = @_;
243			unless (defined $ModuleSourceDNLDocument{$module_uri}) {
244			unless (defined $ModuleSourceDISDocument{$module_uri}) {
245			daf_open_source_dis_document ($module_uri);
246			}
247			}
248			return daf_get_referring_module_uri_list ($module_uri);
249			},
250			on_resource_read => sub ($$) {
251			if ((++$ResourceCount % 10) == 0) {
252			status_msg_ "*";
253			status_msg_ " " if ($ResourceCount % (10 * 10)) == 0;
254			status_msg '' if ($ResourceCount % (10 * 50)) == 0;
255			}
256			});
257
258
259			## Removes reference from document to database
260			our @Document;
261			for my $dis (@Document) {
262			$dis->unlink_from_document;
263			$dis->dis_database (undef);
264			}
265
266			status_msg '';
267
268			status_msg qq<Reading properties...>;
269			$ResourceCount = 0;
270			$db->read_properties (on_resource_read => sub ($$) {
271			if ((++$ResourceCount % 10) == 0) {
272			status_msg_ "*";
273			status_msg_ " " if ($ResourceCount % (10 * 10)) == 0;
274			status_msg '' if ($ResourceCount % (10 * 50)) == 0;
275			}
276	wakaba	1.16	}, implementation => $impl);
277	wakaba	1.1	status_msg '';
278			status_msg "done";
279
280			status_msg_ qq<Writing database files...>;
281			$db->pl_store ('dummy', sub ($$) {
282			my ($db, $mod, $type) = @_;
283			my $ns = $mod->namespace_uri;
284			my $ln = $mod->local_name;
285			my $suffix = $type eq ExpandedURI q<dp:ModuleIndexFile>
286			? $Opt{dafx_suffix} : $Opt{daem_suffix};
287			my $name = dac_search_file_path_stem ($ns, $ln, $suffix);
288			if (defined $name) {
289			$name .= $suffix;
290			} elsif (defined ($name = dac_search_file_path_stem
291			($ns, $ln, $Opt{dis_suffix}))) {
292			$name .= $suffix;
293			} else {
294			$name = Cwd::abs_path
295			(File::Spec->canonpath
296			(File::Spec->catfile
297			(defined $Opt{input_search_path}->{$ns}->[0]
298			? $Opt{input_search_path}->{$ns}->[0] : '.',
299			$ln.$suffix)));
300			}
301			verbose_msg qq<Database >.
302			($type eq <Q::dp\|ModuleIndexFile> ? 'index' : 'module').
303			qq< <$ns$ln> is written to "$name">;
304			return $name;
305			}, no_main_database => 1);
306			status_msg "done";
307
308			daf_check_undefined ();
309
310	wakaba	1.2	undef $DNi;
311			undef %ModuleSourceDNLDocument;
312			exit $HasError if $HasError;
313
314			## --- Creating Files
315
316	wakaba	1.1	for (@{$Opt{create_module}}) {
317			my ($mod_uri, $out_file_path, $mod_for, $out_type) = @$_;
318
319	wakaba	1.2	if ($out_type eq 'perl-pm') {
320	wakaba	1.13	daf_perl_pm ($mod_uri, $out_file_path, $mod_for);
321	wakaba	1.2	} elsif ($out_type eq 'perl-t') {
322	wakaba	1.13	daf_perl_t ($mod_uri, $out_file_path, $mod_for);
323	wakaba	1.14	} elsif ($out_type eq 'dtd-modules') {
324			daf_dtd_modules ($mod_uri, $out_file_path, $mod_for);
325	wakaba	1.17	} elsif ($out_type eq 'dtd-driver') {
326			daf_dtd_driver ($mod_uri, $out_file_path, $mod_for);
327	wakaba	1.1	}
328			}
329
330			daf_check_undefined ();
331
332	wakaba	1.2	## --- The END
333
334	wakaba	1.1	status_msg_ "Closing the database...";
335			$db->free;
336			undef $db;
337			status_msg "done";
338
339	wakaba	1.7	undef $limpl;
340			undef $impl;
341
342	wakaba	1.1	{
343			use integer;
344			my $time = time - $start_time;
345			status_msg sprintf qq<%d'%02d''>, $time / 60, $time % 60;
346			}
347			exit $HasError;
348
349			END {
350			$db->free if $db;
351			}
352
353	wakaba	1.2	## ---- Subroutines
354
355	wakaba	1.1	sub daf_open_source_dis_document ($) {
356			my ($module_uri) = @_;
357
358			## -- Finds \|dis\| source file
359			my $ns = $module_uri;
360			$ns =~ s/(\w+)\z//;
361			my $ln = $1;
362			my $file_name = dac_search_file_path_stem ($ns, $ln, $Opt{dis_suffix});
363			unless (defined $file_name) {
364			die "$0: Source file for <$ns$ln> is not found";
365			}
366			$file_name .= $Opt{dis_suffix};
367
368			status_msg_ qq<Opening dis source file "$file_name"...>;
369
370			## -- Opens \|dis\| file and construct \|DISDocument\| tree
371			open my $file, '<', $file_name or die "$0: $file_name: $!";
372			my $dis = $parser->parse ({character_stream => $file});
373			require File::Spec;
374			$dis->flag (ExpandedURI q<swcfg21:fileName> =>
375			File::Spec->abs2rel ($file_name));
376			$dis->dis_namespace_resolver (\&daf_module_name_namespace_resolver);
377			close $file;
378
379			## -- Registers namespace URI
380			my $mod = $dis->module_element;
381			if ($mod) {
382			my $qn = $mod->get_attribute_ns (ExpandedURI q<dis:>, 'QName');
383			if ($qn) {
384			my $prefix = $qn->value;
385			$prefix =~ s/^[^:\|][:\|]\s//;
386			$prefix =~ s/\s+$//;
387			unless (defined $ModuleNameNamespaceBinding{$prefix}) {
388			$ModuleNameNamespaceBinding{$prefix} = $mod->defining_namespace_uri;
389			}
390			}
391			}
392
393			$ModuleSourceDISDocument{$module_uri} = $dis;
394			status_msg q<done>;
395
396			R: for (@{daf_get_referring_module_uri_list ($module_uri)}) {
397			next R if defined $db->{modDef}->{$_};
398			next R if defined $ModuleSourceDNLDocument{$_};
399			next R if defined $ModuleSourceDISDocument{$_};
400			my $idx_file_name = daf_get_module_index_file_name ($_);
401			if (-f $idx_file_name) {
402			daf_open_current_module_index ($_, $idx_file_name);
403			} else {
404			daf_open_source_dis_document ($_);
405			}
406			}
407			} # daf_open_source_dis_document
408
409			sub daf_open_current_module_index ($$) {
410			my ($module_uri, $file_name) = @_;
411			$db->pl_load_dis_database_index ($file_name);
412
413			R: for (@{$db->get_module ($module_uri)
414			->get_referring_module_uri_list}) {
415			next R if defined $db->{modDef}->{$_};
416			next R if defined $ModuleSourceDNLDocument{$_};
417			next R if defined $ModuleSourceDISDocument{$_};
418			my $idx_file_name = daf_get_module_index_file_name ($_);
419			if (-f $idx_file_name) {
420			daf_open_current_module_index ($_, $idx_file_name);
421			} else {
422			daf_open_source_dis_document ($_);
423			}
424			}
425			} # daf_open_current_module_index
426
427			sub daf_convert_dis_document_to_dnl_document () {
428			M: for my $module_uri (keys %ModuleSourceDISDocument) {
429			my $dis_doc = $ModuleSourceDISDocument{$module_uri};
430			next M unless $dis_doc;
431			verbose_msg_ qq<Converting <$module_uri>...>;
432			my $dnl_doc = $DNi->convert_dis_document_to_dnl_document
433			($dis_doc, database_arg => $db,
434			base_namespace_binding =>
435			{(map {$_->local_name => $_->target_namespace_uri}
436			grep {$_} values %{$db->{modDef}}),
437			%ModuleNameNamespaceBinding});
438			push @Document, $dnl_doc;
439			$ModuleSourceDNLDocument{$module_uri} = $dnl_doc;
440			$dis_doc->free;
441			delete $ModuleSourceDISDocument{$module_uri};
442			verbose_msg q<done>;
443			}
444			} # daf_convert_dis_document_to_dnl_document
445
446			sub daf_get_referring_module_uri_list ($) {
447			my $module_uri = shift;
448			my $ns = $module_uri;
449			$ns =~ s/\w+\z//;
450			my $src = $ModuleSourceDNLDocument{$module_uri};
451			$src = $ModuleSourceDISDocument{$module_uri} unless defined $src;
452			my $mod_el = $src->module_element;
453			my $r = [];
454			if ($mod_el) {
455			my $req_el = $mod_el->require_element;
456			if ($req_el) {
457			M: for my $m_el (@{$req_el->child_nodes}) {
458			next M unless $m_el->node_type eq '#element';
459			next M unless $m_el->expanded_uri eq ExpandedURI q<dis:Module>;
460			my $qn_el = $m_el->get_attribute_ns (ExpandedURI q<dis:>, 'QName');
461			if ($qn_el) {
462			push @$r, $qn_el->qname_value_uri;
463			} else {
464			my $n_el = $m_el->get_attribute_ns (ExpandedURI q<dis:>, 'Name');
465			if ($n_el) {
466			push @$r, $ns.$n_el->value;
467			} else {
468			# The module itself
469			}
470			}
471			}
472			}
473			}
474			return $r;
475			} # daf_get_referring_module_uri_list
476
477			sub dac_search_file_path_stem ($$$) {
478			my ($ns, $ln, $suffix) = @_;
479			require File::Spec;
480	wakaba	1.8	for my $dir (@{$Opt{input_search_path}->{$ns}\|\|[]}) {
481	wakaba	1.1	my $name = Cwd::abs_path
482			(File::Spec->canonpath
483			(File::Spec->catfile ($dir, $ln)));
484			if (-f $name.$suffix) {
485			return $name;
486			}
487			}
488			return undef;
489			} # dac_search_file_path_stem;
490
491			sub daf_get_module_index_file_name ($$) {
492			my ($module_uri) = @_;
493			my $ns = $module_uri;
494			$ns =~ s/(\w+)\z//;
495			my $ln = $1;
496
497			verbose_msg qq<Database module index <$module_uri> is requested>;
498			my $suffix = $Opt{dafx_suffix};
499			my $name = dac_search_file_path_stem ($ns, $ln, $suffix);
500			if (defined $name) {
501			$name .= $suffix;
502			} elsif (defined ($name = dac_search_file_path_stem
503			($ns, $ln, $Opt{dis_suffix}))) {
504			$name .= $suffix;
505			} else {
506			$name = Cwd::abs_path
507			(File::Spec->canonpath
508			(File::Spec->catfile
509			(defined $Opt{input_search_path}->{$ns}->[0]
510			? $Opt{input_search_path}->{$ns}->[0] : '.',
511			$ln.$suffix)));
512			}
513			return $name;
514			} # daf_get_module_index_file_name
515
516			sub daf_module_name_namespace_resolver ($) {
517			my $prefix = shift;
518
519			## -- From modules in database
520			M: for (values %{$db->{modDef}}) {
521			my $mod = $_;
522			next M unless defined $mod;
523			if ($mod->local_name eq $prefix) {
524			return $mod->target_namespace_uri;
525			}
526			}
527
528			## -- From not-in-database-yet module list
529			if (defined $ModuleNameNamespaceBinding{$prefix}) {
530			return $ModuleNameNamespaceBinding{$prefix};
531			}
532			return undef;
533			} # daf_module_name_namespace_resolver
534
535			sub daf_db_module_resolver ($$$) {
536			my ($db, $mod, $type) = @_;
537			my $ns = $mod->namespace_uri;
538			my $ln = $mod->local_name;
539	wakaba	1.11	my $suffix = {
540			ExpandedURI q<dp:ModuleIndexFile> => $Opt{dafx_suffix},
541			ExpandedURI q<dp:ModuleResourceFile> => $Opt{daem_suffix},
542			ExpandedURI q<dp:ModuleNodeStorageFile> => $Opt{dafs_suffix},
543			}->{$type} or die "Unsupported type: <$type>";
544	wakaba	1.1	verbose_msg qq<Database module <$ns$ln> is requested>;
545			my $name = dac_search_file_path_stem ($ns, $ln, $suffix);
546			if (defined $name) {
547			return $name.$suffix;
548			} else {
549			return undef;
550			}
551			} # daf_db_module_resolver
552
553			sub daf_on_error ($$) {
554			my ($self, $err) = @_;
555			if ($err->severity == $err->SEVERITY_WARNING) {
556			my $info = ExpandedURI q<dp:info>;
557			if ($err->type =~ /\Q$info\E/) {
558			my $msg = $err->text;
559			if ($msg =~ /\.\.\.\z/) {
560			verbose_msg_ $msg;
561			} else {
562			verbose_msg $msg;
563			}
564			} else {
565			my $msg = $err->text;
566			if ($msg =~ /\.\.\.\z/) {
567			status_msg_ $msg;
568			} else {
569			status_msg $msg;
570			}
571			}
572			} else {
573			warn $err;
574			$HasError = 1;
575			}
576			} # daf_on_error
577
578			sub daf_check_undefined () {
579			unless ($Opt{no_undef_check}) {
580			status_msg_ "Checking undefined resources...";
581			$db->check_undefined_resource;
582			print STDERR "done\n";
583			}
584			} # daf_check_undefined
585	wakaba	1.2
586	wakaba	1.1	__END__
587
588			=head1 NAME
589
590			dac.pl - Creating "dac" Database File from "dis" Source Files
591
592			=head1 SYNOPSIS
593
594			perl path/to/dac.pl [--input-db-file-name=input.dac] \
595			--output-file-name=out.dac [options...] \
596			input.dis
597			perl path/to/dac.pl --help
598
599			=head1 DESCRIPTION
600
601			This script, C<dac.pl>, compiles "dis" source files into "dac"
602			database file. The generated database file can be used
603			in turn to generate Perl module file, for example, by another
604			script C<dac2pm.pl> or can be used to create larger database
605			by specifying its file name as the C<--input-db-file-name>
606			argument of another C<dac.pl> execution.
607
608			This script is part of manakai.
609
610			=head1 OPTIONS
611
612			=over 4
613
614			=item I<input.dis> (Required)
615
616			The unnamed option specifies a file name path of the source "dis" file
617			from which a database is created. This option is required.
618
619			=item C<--input-db-file-name=I<file-name>> (Default: none)
620
621			A file path of the base database. This option is optional; if this
622			option is specified, the database file is loaded first
623			and then I<input.dis> file is loaded in the context of it.
624			Otherwise, a new database is created.
625
626			=back
627
628			=head1 SEE ALSO
629
630			L<lib/Message/Util/DIS.dis> - The actual implementation
631			of the "dis" interpretation.
632
633			=head1 LICENSE
634
635	wakaba	1.13	Copyright 2004-2006 Wakaba <w@suika.fam.cx>. All rights reserved.
636	wakaba	1.1
637			This program is free software; you can redistribute it and/or
638			modify it under the same terms as Perl itself.
639
640			=cut