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#!/usr/bin/perl
eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
if $running_under_some_shell;
# pod2latex conversion program
use strict;
use Pod::LaTeX;
use Pod::Find qw/ pod_find /;
use Pod::Usage;
use Getopt::Long;
use File::Basename;
use Symbol;
my $VERSION = "1.01";
# return the entire contents of a text file
# whose name is given as argument
sub _get {
my $fn = shift;
my $infh = gensym;
open $infh, $fn
or die "Could not open file $fn: $!\n";
local $/;
return <$infh>;
}
# Read command line arguments
my %options = (
"help" => 0,
"man" => 0,
"sections" => [],
"full" => 0,
"out" => undef,
"verbose" => 0,
"modify" => 0,
"h1level" => 1, # section is equivalent to H1
"preamble" => [],
"postamble" => [],
);
# "prefile" is just like "preamble", but the argument
# comes from the file named by the argument
$options{"prefile"} = sub { shift; push @{$options{"preamble"}}, _get(shift) };
# the same between "postfile" and "postamble"
$options{"postfile"} = sub { shift; push @{$options{"postamble"}}, _get(shift) };
GetOptions(\%options,
"help",
"man",
"verbose",
"full",
"sections=s@",
"out=s",
"modify",
"h1level=i",
"preamble=s@",
"postamble=s@",
"prefile=s",
"postfile=s"
) || pod2usage(2);
pod2usage(1) if ($options{help});
pod2usage(-verbose => 2) if ($options{man});
# Read all the files from the command line
my @files = @ARGV;
# Now find which ones are real pods and convert
# directories to their contents.
# Extract the pods from each arg since some of them might
# be directories
# This is not as efficient as using pod_find to search through
# everything at once but it allows us to preserve the order
# supplied by the user
my @pods;
foreach my $arg (@files) {
my %pods = pod_find($arg);
push(@pods, sort keys %pods);
}
# Abort if nothing to do
if ($#pods == -1) {
warn "None of the supplied Pod files actually exist\n";
exit;
}
# Only want to override the preamble and postamble if we have
# been given values.
my %User;
$User{UserPreamble} = join("\n", @{$options{'preamble'}})
if ($options{preamble} && @{$options{preamble}});
$User{UserPostamble} = join("\n", @{$options{'postamble'}})
if ($options{postamble} && @{$options{postamble}});
# If $options{'out'} is set we are processing to a single output file
my $multi_documents;
if (exists $options{'out'} && defined $options{'out'}) {
$multi_documents = 0;
} else {
$multi_documents = 1;
}
# If the output file is not specified it is assumed that
# a single output file is required per input file using
# a .tex extension rather than any existing extension
if ($multi_documents) {
# Case where we just generate one input per output
foreach my $pod (@pods) {
if (-f $pod) {
my $output = $pod;
$output = basename($output, '.pm', '.pod','.pl') . '.tex';
# Create a new parser object
my $parser = new Pod::LaTeX(
AddPreamble => $options{'full'},
AddPostamble => $options{'full'},
MakeIndex => $options{'full'},
TableOfContents => $options{'full'},
ReplaceNAMEwithSection => $options{'modify'},
UniqueLabels => $options{'modify'},
Head1Level => $options{'h1level'},
LevelNoNum => $options{'h1level'} + 1,
%User,
);
# Select sections if supplied
$parser->select(@{ $options{'sections'}})
if @{$options{'sections'}};
# Derive the input file from the output file
$parser->parse_from_file($pod, $output);
print "Written output to $output\n" if $options{'verbose'};
} else {
warn "File $pod not found\n";
}
}
} else {
# Case where we want everything to be in a single document
# Need to open the output file ourselves
my $output = $options{'out'};
$output .= '.tex' unless $output =~ /\.tex$/;
# Use auto-vivified file handle in perl 5.6
my $outfh = gensym;
open ($outfh, ">$output") || die "Could not open output file: $!\n";
# Flag to indicate whether we have converted at least one file
# indicates how many files have been converted
my $converted = 0;
# Loop over the input files
foreach my $pod (@pods) {
if (-f $pod) {
warn "Converting $pod\n" if $options{'verbose'};
# Open the file (need the handle)
# Use auto-vivified handle in perl 5.6
my $podfh = gensym;
open ($podfh, "<$pod") || die "Could not open pod file $pod: $!\n";
# if this is the first file to be converted we may want to add
# a preamble (controlled by command line option)
my $preamble = 0;
$preamble = 1 if ($converted == 0 && $options{'full'});
# if this is the last file to be converted may want to add
# a postamble (controlled by command line option)
# relies on a previous pass to check existence of all pods we
# are converting.
my $postamble = ( ($converted == $#pods && $options{'full'}) ? 1 : 0 );
# Open parser object
# May want to start with a preamble for the first one and
# end with an index for the last
my $parser = new Pod::LaTeX(
MakeIndex => $options{'full'},
TableOfContents => $preamble,
ReplaceNAMEwithSection => $options{'modify'},
UniqueLabels => $options{'modify'},
StartWithNewPage => $options{'full'},
AddPreamble => $preamble,
AddPostamble => $postamble,
Head1Level => $options{'h1level'},
LevelNoNum => $options{'h1level'} + 1,
%User
);
# Store the file name for error messages
# This is a kluge that breaks the data hiding of the object
$parser->{_INFILE} = $pod;
# Select sections if supplied
$parser->select(@{ $options{'sections'}})
if @{$options{'sections'}};
# Parse it
$parser->parse_from_filehandle($podfh, $outfh);
# We have converted at least one file
$converted++;
} else {
warn "File $pod not found\n";
}
}
# Should unlink the file if we didn't convert anything!
# dont check for return status of unlink
# since there is not a lot to be done if the unlink failed
# and the program does not rely upon it.
unlink "$output" unless $converted;
# If verbose
warn "Converted $converted files\n" if $options{'verbose'};
}
exit;
__END__
=head1 NAME
pod2latex - convert pod documentation to latex format
=head1 SYNOPSIS
pod2latex *.pm
pod2latex -out mytex.tex *.pod
pod2latex -full -sections 'DESCRIPTION|NAME' SomeDir
pod2latex -prefile h.tex -postfile t.tex my.pod
=head1 DESCRIPTION
C<pod2latex> is a program to convert POD format documentation
(L<perlpod>) into latex. It can process multiple input documents at a
time and either generate a latex file per input document or a single
combined output file.
=head1 OPTIONS AND ARGUMENTS
This section describes the supported command line options. Minimum
matching is supported.
=over 4
=item B<-out>
Name of the output file to be used. If there are multiple input pods
it is assumed that the intention is to write all translated output
into a single file. C<.tex> is appended if not present. If the
argument is not supplied, a single document will be created for each
input file.
=item B<-full>
Creates a complete C<latex> file that can be processed immediately
(unless C<=for/=begin> directives are used that rely on extra packages).
Table of contents and index generation commands are included in the
wrapper C<latex> code.
=item B<-sections>
Specify pod sections to include (or remove if negated) in the
translation. See L<Pod::Select/"SECTION SPECIFICATIONS"> for the
format to use for I<section-spec>. This option may be given multiple
times on the command line.This is identical to the similar option in
the C<podselect()> command.
=item B<-modify>
This option causes the output C<latex> to be slightly
modified from the input pod such that when a C<=head1 NAME>
is encountered a section is created containing the actual
pod name (rather than B<NAME>) and all subsequent C<=head1>
directives are treated as subsections. This has the advantage
that the description of a module will be in its own section
which is helpful for including module descriptions in documentation.
Also forces C<latex> label and index entries to be prefixed by the
name of the module.
=item B<-h1level>
Specifies the C<latex> section that is equivalent to a C<H1> pod
directive. This is an integer between 0 and 5 with 0 equivalent to a
C<latex> chapter, 1 equivalent to a C<latex> section etc. The default
is 1 (C<H1> equivalent to a latex section).
=item B<-help>
Print a brief help message and exit.
=item B<-man>
Print the manual page and exit.
=item B<-verbose>
Print information messages as each document is processed.
=item B<-preamble>
A user-supplied preamble for the LaTeX code. Multiple values
are supported and appended in order separated by "\n".
See B<-prefile> for reading the preamble from a file.
=item B<-postamble>
A user supplied postamble for the LaTeX code. Multiple values
are supported and appended in order separated by "\n".
See B<-postfile> for reading the postamble from a file.
=item B<-prefile>
A user-supplied preamble for the LaTeX code to be read from the
named file. Multiple values are supported and appended in
order. See B<-preamble>.
=item B<-postfile>
A user-supplied postamble for the LaTeX code to be read from the
named file. Multiple values are supported and appended in
order. See B<-postamble>.
=back
=head1 BUGS
Known bugs are:
=over 4
=item *
Cross references between documents are not resolved when multiple
pod documents are converted into a single output C<latex> file.
=item *
Functions and variables are not automatically recognized
and they will therefore not be marked up in any special way
unless instructed by an explicit pod command.
=back
=head1 SEE ALSO
L<Pod::LaTeX>
=head1 AUTHOR
Tim Jenness E<lt>tjenness@cpan.orgE<gt>
This program is free software; you can redistribute it
and/or modify it under the same terms as Perl itself.
Copyright (C) 2000, 2003, 2004 Tim Jenness. All Rights Reserved.
=cut
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