source: trunk/essentials/dev-lang/perl/pod/pod2text.PL@ 3298

#!/usr/local/bin/perl

use Config;
use File::Basename qw(&basename &dirname);
use Cwd;

# List explicitly here the variables you want Configure to
# generate.  Metaconfig only looks for shell variables, so you
# have to mention them as if they were shell variables, not
# %Config entries.  Thus you write
#  $startperl
# to ensure Configure will look for $Config{startperl}.

# This forces PL files to create target in same directory as PL file.
# This is so that make depend always knows where to find PL derivatives.
$origdir = cwd;
chdir dirname($0);
$file = basename($0, '.PL');
$file .= '.com' if $^O eq 'VMS';

open OUT,">$file" or die "Can't create $file: $!";

print "Extracting $file (with variable substitutions)\n";

# In this section, perl variables will be expanded during extraction.
# You can use $Config{...} to use Configure variables.

print OUT <<"!GROK!THIS!";
$Config{startperl}
    eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
        if \$running_under_some_shell;
!GROK!THIS!

# In the following, perl variables are not expanded during extraction.

print OUT <<'!NO!SUBS!';

# pod2text -- Convert POD data to formatted ASCII text.
#
# Copyright 1999, 2000, 2001 by Russ Allbery <[email protected]>
#
# This program is free software; you may redistribute it and/or modify it
# under the same terms as Perl itself.
#
# The driver script for Pod::Text, Pod::Text::Termcap, and Pod::Text::Color,
# invoked by perldoc -t among other things.

require 5.004;

use Getopt::Long qw(GetOptions);
use Pod::Text ();
use Pod::Usage qw(pod2usage);

use strict;

# Silence -w warnings.
use vars qw($running_under_some_shell);

# Take an initial pass through our options, looking for one of the form
# -<number>.  We turn that into -w <number> for compatibility with the
# original pod2text script.
for (my $i = 0; $i < @ARGV; $i++) {
    last if $ARGV[$i] =~ /^--$/;
    if ($ARGV[$i] =~ /^-(\d+)$/) {
        splice (@ARGV, $i++, 1, '-w', $1);
    }
}

# Insert -- into @ARGV before any single dash argument to hide it from
# Getopt::Long; we want to interpret it as meaning stdin (which Pod::Parser
# does correctly).
my $stdin;
@ARGV = map { $_ eq '-' && !$stdin++ ? ('--', $_) : $_ } @ARGV;

# Parse our options.  Use the same names as Pod::Text for simplicity, and
# default to sentence boundaries turned off for compatibility.
my %options;
$options{sentence} = 0;
Getopt::Long::config ('bundling');
GetOptions (\%options, 'alt|a', 'code', 'color|c', 'help|h', 'indent|i=i',
            'loose|l', 'margin|left-margin|m=i', 'overstrike|o',
            'quotes|q=s', 'sentence|s', 'termcap|t', 'width|w=i') or exit 1;
pod2usage (1) if $options{help};

# Figure out what formatter we're going to use.  -c overrides -t.
my $formatter = 'Pod::Text';
if ($options{color}) {
    $formatter = 'Pod::Text::Color';
    eval { require Term::ANSIColor };
    if ($@) { die "-c (--color) requires Term::ANSIColor be installed\n" }
    require Pod::Text::Color;
} elsif ($options{termcap}) {
    $formatter = 'Pod::Text::Termcap';
    require Pod::Text::Termcap;
} elsif ($options{overstrike}) {
    $formatter = 'Pod::Text::Overstrike';
    require Pod::Text::Overstrike;
}
delete @options{'color', 'termcap', 'overstrike'};

# Initialize and run the formatter.
my $parser = $formatter->new (%options);
$parser->parse_from_file (@ARGV);

__END__

=head1 NAME

pod2text - Convert POD data to formatted ASCII text

=head1 SYNOPSIS

pod2text [B<-aclost>] [B<--code>] [B<-i> I<indent>] S<[B<-q> I<quotes>]>
S<[B<-w> I<width>]> [I<input> [I<output>]]

pod2text B<-h>

=head1 DESCRIPTION

B<pod2text> is a front-end for Pod::Text and its subclasses.  It uses them
to generate formatted ASCII text from POD source.  It can optionally use
either termcap sequences or ANSI color escape sequences to format the text.

I<input> is the file to read for POD source (the POD can be embedded in
code).  If I<input> isn't given, it defaults to STDIN.  I<output>, if given,
is the file to which to write the formatted output.  If I<output> isn't
given, the formatted output is written to STDOUT.

=head1 OPTIONS

=over 4

=item B<-a>, B<--alt>

Use an alternate output format that, among other things, uses a different
heading style and marks C<=item> entries with a colon in the left margin.

=item B<--code>

Include any non-POD text from the input file in the output as well.  Useful
for viewing code documented with POD blocks with the POD rendered and the
code left intact.

=item B<-c>, B<--color>

Format the output with ANSI color escape sequences.  Using this option
requires that Term::ANSIColor be installed on your system.

=item B<-i> I<indent>, B<--indent=>I<indent>

Set the number of spaces to indent regular text, and the default indentation
for C<=over> blocks.  Defaults to 4 spaces if this option isn't given.

=item B<-h>, B<--help>

Print out usage information and exit.

=item B<-l>, B<--loose>

Print a blank line after a C<=head1> heading.  Normally, no blank line is
printed after C<=head1>, although one is still printed after C<=head2>,
because this is the expected formatting for manual pages; if you're
formatting arbitrary text documents, using this option is recommended.

=item B<-m> I<width>, B<--left-margin>=I<width>, B<--margin>=I<width>

The width of the left margin in spaces.  Defaults to 0.  This is the margin
for all text, including headings, not the amount by which regular text is
indented; for the latter, see B<-i> option.

=item B<-o>, B<--overstrike>

Format the output with overstruck printing.  Bold text is rendered as
character, backspace, character.  Italics and file names are rendered as
underscore, backspace, character.  Many pagers, such as B<less>, know how
to convert this to bold or underlined text.

=item B<-q> I<quotes>, B<--quotes>=I<quotes>

Sets the quote marks used to surround CE<lt>> text to I<quotes>.  If
I<quotes> is a single character, it is used as both the left and right
quote; if I<quotes> is two characters, the first character is used as the
left quote and the second as the right quoted; and if I<quotes> is four
characters, the first two are used as the left quote and the second two as
the right quote.

I<quotes> may also be set to the special value C<none>, in which case no
quote marks are added around CE<lt>> text.

=item B<-s>, B<--sentence>