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#!/usr/bin/perl eval 'exec /usr/bin/perl -S $0 ${1+"$@"}' if 0; # not running under some shell 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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