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bird/doc/LinuxDocTools.pm
Robert Scheck 7a53383a22 Doc: Add alternative path for SGML ISO entities 8879.1986 to $SGML_CATALOG_FILES 
The existing paths are valid for Debian, alternative paths are necessary
for Fedora and RHEL/CentOS.
2018-12-20 13:25:31 +01:00

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#! /usr/bin/perl
#
# LinuxDocTools.pm
#
# $Id$
#
# LinuxDoc-Tools driver core. This contains all the basic functionality
# we need to control all other components.
#
# © Copyright 1996, Cees de Groot.
# © Copyright 2000, Taketoshi Sano
#
# THIS VERSION HAS BEEN HACKED FOR BIRD BY MARTIN MARES
#
package LinuxDocTools;
require 5.004;
use strict;
=head1 NAME
LinuxDocTools - SGML conversion utilities for LinuxDoc DTD.
=head1 SYNOPSIS
use LinuxDocTools;
LinuxDocTools::init;
@files = LinuxDocTools::process_options ($0, @ARGV);
for $curfile (@files) {
LinuxDocTools::process_file ($curfile);
}
=head1 DESCRIPTION
The LinuxDocTools package encapsulates all the functionality offered by
LinuxDoc-Tools. It is used, of course, by LinuxDoc-Tools;
but the encapsulation should provide for a simple interface for other users as well.
=head1 FUNCTIONS
=over 4
=cut
use DirHandle;
use File::Basename;
use File::Find;
use File::Copy;
use FileHandle;
use IPC::Open2;
use Cwd;
use LinuxDocTools::Lang;
use LinuxDocTools::Utils qw(process_options usage cleanup trap_signals remove_tmpfiles create_temp);
use LinuxDocTools::Vars;
sub BEGIN
{
#
# Make sure we're always looking here. Note that "use lib" adds
# on the front of the search path, so we first push dist, then
# site, so that site is searched first.
#
use lib "$main::DataDir/dist";
use lib "$main::DataDir/site";
}
=item LinuxDocTools::init
Takes care of initialization of package-global variables (which are actually
defined in L<LinuxDocTools::Vars>). The package-global variables are I<$global>,
a reference to a hash containing numerous settings, I<%Formats>, a hash
containing all the formats, and I<%FmtList>, a hash containing the currently
active formats for help texts.
Apart from this, C<LinuxDocTools::init> also finds all distributed and site-local
formatting backends and C<require>s them.
=cut
sub init
{
trap_signals;
#
# Register the ``global'' pseudoformat. Apart from the global settings,
# we also use $global to keep the global variable name space clean;
# everything that we need to provide to other modules is stuffed
# into $global.
#
$global = {};
$global->{NAME} = "global";
$global->{HELP} = "";
$global->{OPTIONS} = [
{ option => "backend", type => "l",
'values' => [ "html", "info", "latex",
"lyx", "rtf", "txt", "check" ],
short => "B" },
{ option => "papersize", type => "l",
'values' => [ "a4", "letter" ], short => "p" },
{ option => "language", type => "l",
'values' => [ @LinuxDocTools::Lang::Languages ], short => "l" },
{ option => "charset", type => "l",
'values' => [ "latin", "ascii", "nippon", "euc-kr" ], short => "c" },
{ option => "style", type => "s", short => "S" },
{ option => "tabsize", type => "i", short => "t" },
# { option => "verbose", type => "f", short => "v" },
{ option => "debug", type => "f", short => "d" },
{ option => "define", type => "s", short => "D" },
{ option => "include", type => "s", short => "i" },
{ option => "pass", type => "s", short => "P" }
];
$global->{backend} = "linuxdoc";
$global->{papersize} = "a4";
$global->{language} = "en";
$global->{charset} = "ascii";
$global->{style} = "";
$global->{tabsize} = 8;
$global->{verbose} = 0;
$global->{define} = "";
$global->{debug} = 0;
$global->{include} = "";
$global->{pass} = "";
$global->{InFiles} = [];
$Formats{$global->{NAME}} = $global; # All formats we know.
$FmtList{$global->{NAME}} = $global; # List of formats for help msgs.
# automatic language detection: disabled by default
# {
# my $lang;
# foreach $lang (@LinuxDocTools::Lang::Languages)
# {
# if (($ENV{"LC_ALL"} =~ /^$lang/i) ||
# ($ENV{"LC_CTYPE"} =~ /^$lang/i) ||
# ($ENV{"LANG"} =~ /^$lang/i)) {
# $global->{language} = Any2ISO($lang);
# }
# }
# }
#
# Used when the format is "global" (from sgmlcheck).
#
$global->{preNSGMLS} = sub {
$global->{NsgmlsOpts} .= " -s ";
$global->{NsgmlsPrePipe} = "cat $global->{file}";
};
#
# Build up the list of formatters.
#
my $savdir = cwd;
my %Locs;
chdir "$main::DataDir/dist";
my $dir = new DirHandle(".");
die "Unable to read directory $main::DataDir/dist: $!" unless defined($dir);
foreach my $fmt (grep(/^fmt_.*\.pl$/, $dir->read()))
{
$Locs{$fmt} = "dist";
}
$dir->close();
chdir "$main::DataDir/site";
$dir = new DirHandle(".");
die "Unable to read directory $main::DataDir/site: $!" unless defined($dir);
foreach my $fmt (grep(/^fmt_.*\.pl$/, $dir->read()))
{
$Locs{$fmt} = "site";
}
$dir->close();
foreach my $fmt (keys %Locs)
{
require $fmt;
}
chdir $savdir;
}
=item LinuxDocTools::process_options ($0, @ARGV)
This function contains all initialization that is bound to the current
invocation of LinuxDocTools. It looks in C<$0> to deduce the backend that
should be used (ld2txt activates the I<txt> backend) and parses the
options array. It returns an array of filenames it encountered during
option processing.
As a side effect, the environment variables I<SGMLDECL> and
I<SGML_CATALOG_FILES> are modified.
=cut
sub process_options
{
my $progname = shift;
my @args = @_;
#
# Deduce the format from the caller's file name
#
my ($format, $dummy1, $dummy2) = fileparse ($progname, "");
$global->{myname} = $format;
$format =~ s/sgml2*(.*)/$1/;
#
# check the option "--backend / -B"
#
if ($format eq "linuxdoc") {
my @backends = @args;
my $arg;
while (@backends) {
$arg = shift @backends;
if ($arg eq "-B") {
$arg = shift @backends;
$format = $arg;
last;
}
if ( $arg =~ s/--backend=(.*)/$1/ ) {
$format = $arg;
last;
}
}
}
$format = "global" if $format eq "check";
usage ("") if $format eq "linuxdoc";
$format = "latex2e" if $format eq "latex";
$FmtList{$format} = $Formats{$format} or
usage ("$global->{myname}: unknown format");
$global->{format} = $format;
#
# Parse all the options.
#
my @files = LinuxDocTools::Utils::process_options (@args);
$global->{language} = Any2ISO ($global->{language});
#
# check the number of given files
$#files > -1 || usage ("no filenames given");
#
# Setup the SGML environment.
# (Note that Debian package rewrite path to catalog of
# iso-entities using debian/rules so that it can use
# entities from sgml-data pacakge. debian/rules also
# removes iso-entites sub directory after doing make install.)
#
$ENV{SGML_CATALOG_FILES} .= (defined $ENV{SGML_CATALOG_FILES} ? ":" : "") .
"$main::prefix/share/sgml/sgml-iso-entities-8879.1986/catalog:" .
"$main::prefix/share/sgml/entities/sgml-iso-entities-8879.1986/catalog";
$ENV{SGML_CATALOG_FILES} .= ":$main::DataDir/linuxdoc-tools.catalog";
$ENV{SGML_CATALOG_FILES} .= ":$main::/etc/sgml.catalog";
if (-f "$main::DataDir/dtd/$format.dcl")
{
$ENV{SGMLDECL} = "$main::DataDir/dtd/$format.dcl";
}
elsif (-f "$main::DataDir/dtd/$global->{style}.dcl")
{
$ENV{SGMLDECL} = "$main::DataDir/dtd/$global->{style}.dcl";
}
elsif (-f "$main::DataDir/dtd/sgml.dcl")
{
$ENV{SGMLDECL} = "$main::DataDir/dtd/sgml.dcl";
}
#
# OK. Give the list of files we distilled from the options
# back to the caller.
#
return @files;
}
=item LinuxDocTools::process_file
With all the configuration done, this routine will take a single filename
and convert it to the currently active backend format. The conversion is
done in a number of steps in tight interaction with the currently active
backend (see also L<LinuxDocTools::BackEnd>):
=over
=item 1. Backend: set NSGMLS options and optionally create a pre-NSGMLS pipe.
=item 2. Here: Run the preprocessor to handle conditionals.
=item 3. Here: Run NSGMLS.
=item 4. Backend: run pre-ASP conversion.
=item 5. Here: Run SGMLSASP.
=item 6. Backend: run post-ASP conversion, generating the output.
=back
All stages are influenced by command-line settings, currently active format,
etcetera. See the code for details.
=cut
sub process_file
{
my $file = shift (@_);
my $saved_umask = umask;
print "Processing file $file\n";
umask 0077;
my ($filename, $filepath, $filesuffix) = fileparse ($file, "\.sgml");
my $tmpnam = $filepath . '/' . $filename;
$file = $tmpnam . $filesuffix;
-f $file || $file =~ /.*.sgml$/ || ($file .= '.sgml');
-f $file || ($file = $tmpnam . '.SGML');
-f $file || die "Cannot find $file\n";
$global->{filename} = $filename;
$global->{file} = $file;
$global->{filepath} = $filepath;
my $tmp = new FileHandle "<$file";
my $dtd;
while ( <$tmp> )
{
tr/A-Z/a-z/;
# check for [<!doctype ... system] type definition
if ( /<!doctype\s*(\w*)\s*system/ )
{
$dtd = $1;
last;
}
# check for <!doctype ... PUBLIC ... DTD ...
if ( /<!doctype\s*\w*\s*public\s*.*\/\/dtd\s*(\w*)/mi )
{
$dtd = $1;
last;
}
# check for <!doctype ...
# PUBLIC ... DTD ...
# (multi-line version)
if ( /<!doctype\s*(\w*)/ )
{
$dtd = "precheck";
next;
}
if ( /\s*public\s*.*\/\/dtd\s*(\w*)/ && $dtd eq "precheck" )
{
$dtd = $1;
last;
}
}
$tmp->close;
if ( $global->{debug} )
{
print "DTD: " . $dtd . "\n";
}
$global->{dtd} = $dtd;
# prepare temporary directory
my $tmpdir = $ENV{'TMPDIR'} || '/tmp';
$tmpdir = $tmpdir . '/' . 'linuxdoc-dir-' . $$;
mkdir ($tmpdir, 0700) ||
die " - temporary files can not be created, aborted - \n";
my $tmpbase = $global->{tmpbase} = $tmpdir . '/sgmltmp.' . $filename;
$ENV{"SGML_SEARCH_PATH"} .= ":$filepath";
#
# Set up the preprocessing command. Conditionals have to be
# handled here until they can be moved into the DTD, otherwise
# a validating SGML parser will choke on them.
#
# check if output option for latex is pdf or not
if ($global->{format} eq "latex2e")
{
if ($Formats{$global->{format}}{output} eq "pdf")
{
$global->{define} .= " pdflatex=yes";
}
}
#
my($precmd) = "|sgmlpre output=$global->{format} $global->{define}";
#
# You can hack $NsgmlsOpts here, etcetera.
#
$global->{NsgmlsOpts} .= "-D $main::prefix/share/sgml -D $main::DataDir";
$global->{NsgmlsOpts} .= "-i$global->{include}" if ($global->{include});
$global->{NsgmlsPrePipe} = "NOTHING";
if ( defined $Formats{$global->{format}}{preNSGMLS} )
{
$global->{NsgmlsPrePipe} = &{$Formats{$global->{format}}{preNSGMLS}};
}
#
# Run the prepocessor and nsgmls.
#
my ($ifile, $writensgmls);
if ($global->{NsgmlsPrePipe} eq "NOTHING")
{
$ifile = new FileHandle $file;
}
else
{
$ifile = new FileHandle "$global->{NsgmlsPrePipe}|";
}
create_temp("$tmpbase.1");
$writensgmls = new FileHandle
"$precmd|$main::progs->{NSGMLS} $global->{NsgmlsOpts} $ENV{SGMLDECL} >\"$tmpbase.1\"";
if ($global->{charset} eq "latin")
{
while (<$ifile>)
{
# Outline these commands later on - CdG
#change latin1 characters to SGML
#by Farzad Farid, adapted by Greg Hankins
s/À/\&Agrave;/g;
s/Á/\&Aacute;/g;
s/Â/\&Acirc;/g;
s/Ã/\&Atilde;/g;
s/Ä/\&Auml;/g;
s/Å/\&Aring;/g;
s/Æ/\&AElig;/g;
s/Ç/\&Ccedil;/g;
s/È/\&Egrave;/g;
s/É/\&Eacute;/g;
s/Ê/\&Ecirc;/g;
s/Ë/\&Euml;/g;
s/Ì/\&Igrave;/g;
s/Í/\&Iacute;/g;
s/Î/\&Icirc;/g;
s/Ï/\&Iuml;/g;
s/Ñ/\&Ntilde;/g;
s/Ò/\&Ograve;/g;
s/Ó/\&Oacute;/g;
s/Ô/\&Ocirc;/g;
s/Õ/\&Otilde;/g;
s/Ö/\&Ouml;/g;
s/Ø/\&Oslash;/g;
s/Ù/\&Ugrave;/g;
s/Ú/\&Uacute;/g;
s/Û/\&Ucirc;/g;
s/Ü/\&Uuml;/g;
s/Ý/\&Yacute;/g;
s/Þ/\&THORN;/g;
s/ß/\&szlig;/g;
s/à/\&agrave;/g;
s/á/\&aacute;/g;
s/â/\&acirc;/g;
s/ã/\&atilde;/g;
s/ä/\&auml;/g;
s/å/\&aring;/g;
s/æ/\&aelig;/g;
s/ç/\&ccedil;/g;
s/è/\&egrave;/g;
s/é/\&eacute;/g;
s/ê/\&ecirc;/g;
s/ë/\&euml;/g;
s/ì/\&igrave;/g;
s/í/\&iacute;/g;
s/î/\&icirc;/g;
s/ï/\&iuml;/g;
s/µ/\&mu;/g;
s/ð/\&eth;/g;
s/ñ/\&ntilde;/g;
s/ò/\&ograve;/g;
s/ó/\&oacute;/g;
s/ô/\&ocirc;/g;
s/õ/\&otilde;/g;
s/ö/\&ouml;/g;
s/ø/\&oslash;/g;
s/ù/\&ugrave;/g;
s/ú/\&uacute;/g;
s/û/\&ucirc;/g;
s/ü/\&uuml;/g;
s/ý/\&yacute;/g;
s/þ/\&thorn;/g;
s/ÿ/\&yuml;/g;
print $writensgmls $_;
}
}
else
{
while (<$ifile>)
{
print $writensgmls $_;
}
}
$ifile->close;
$writensgmls->close;
#
# Special case: if format is global, we're just checking.
#
$global->{format} eq "global" && cleanup;
#
# If the output file is empty, something went wrong.
#
! -e "$tmpbase.1" and die "can't create file - exiting";
-z "$tmpbase.1" and die "SGML parsing error - exiting";
if ( $global->{debug} )
{
print "Nsgmls stage finished.\n";
}
#
# If a preASP stage is defined, let the format handle it.
#
# preASP ($inhandle, $outhandle);
#
my $inpreasp = new FileHandle "<$tmpbase.1";
my $outpreasp = new FileHandle "$tmpbase.2",O_WRONLY|O_CREAT|O_EXCL,0600;
if (defined $Formats{$global->{format}}{preASP})
{
&{$Formats{$global->{format}}{preASP}}($inpreasp, $outpreasp) == 0 or
die "error pre-processing $global->{format}.\n";
}
else
{
copy ($inpreasp, $outpreasp);
}
$inpreasp->close;
$outpreasp->close;
! -e "$tmpbase.2" and die "can't create file - exiting";
if ( $global->{debug} )
{
print "PreASP stage finished.\n";
}
#
# Run sgmlsasp, with an optional style if specified.
#
# Search order:
# - datadir/site/<dtd>/<format>
# - datadir/dist/<dtd>/<format>
# So we need to fetch the doctype from the intermediate.
#
# Note: this is a very simplistic check - but as far as I know,
# it is correct. Am I right?
#
my $tmp = new FileHandle "<$tmpbase.2";
my $dtd;
while ( ($dtd = <$tmp>) && ! ( $dtd =~ /^\(/) ) { };
$tmp->close;
$dtd =~ s/^\(//;
$dtd =~ tr/A-Z/a-z/;
chop $dtd;
$global->{dtd} = $dtd;
my $style = "";
if ($global->{style})
{
$style = "$main::DataDir/site/$dtd/$global->{format}/$global->{style}mapping";
-r $style or
$style = "$main::DataDir/dist/$dtd/$global->{format}/$global->{style}mapping";
}
my $mapping = "$main::DataDir/site/$dtd/$global->{format}/mapping";
-r $mapping or $mapping = "$main::DataDir/dist/$dtd/$global->{format}/mapping";
$global->{charset} = "nippon" if ($global->{language} eq "ja");
#
# we don't have Korean groff so charset should be latin1.
#
if ($global->{language} eq "ko")
{
if ($global->{format} eq "groff")
{
$global->{charset} = "latin1";
}
else
{
$global->{charset} = "euc-kr";
}
}
if ($global->{format} eq "groff" or $global->{format} eq "latex2e")
{
if ($dtd eq "linuxdoctr")
{
$mapping = "$main::DataDir/dist/$dtd/$global->{format}/tr-mapping";
}
}
create_temp("$tmpbase.3");
system ("$main::progs->{SGMLSASP} $style $mapping <\"$tmpbase.2\" |
expand -$global->{tabsize} >\"$tmpbase.3\"");
! -e "$tmpbase.3" and die "can't create file - exiting";
if ( $global->{debug} )
{
print "ASP stage finished.\n";
}
#
# If a postASP stage is defined, let the format handle it.
# It should leave whatever it thinks is right based on $file.
#
# postASP ($inhandle)
#
umask $saved_umask;
my $inpostasp = new FileHandle "<$tmpbase.3";
if (defined $Formats{$global->{format}}{postASP})
{
&{$Formats{$global->{format}}{postASP}}($inpostasp) == 0 or
die "error post-processing $global->{format}.\n";
}
$inpostasp->close;
if ( $global->{debug} )
{
print "postASP stage finished.\n";
}
#
# All done, remove the temporaries.
#
if( !$global->{debug} ) {
remove_tmpfiles($tmpbase);
}
}
=pod
=back
=head1 SEE ALSO
Documentation for various sub-packages of LinuxDocTools.
=head1 AUTHOR
SGMLTools are written by Cees de Groot, C<E<lt>cg@cdegroot.comE<gt>>,
and various SGML-Tools contributors as listed in C<CONTRIBUTORS>.
Taketoshi Sano C<E<lt>sano@debian.org<gt>> rename to LinuxDocTools.
=cut
1;
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