3 eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
4 if 0; # not running under some shell
5 eval 'exec /usr/bin/perl -S $0 ${1+"$@"}'
6 if $running_under_some_shell;
8 # pod2text -- Convert POD data to formatted ASCII text.
10 # Copyright 1999, 2000, 2001, 2004, 2006, 2008 Russ Allbery <rra@stanford.edu>
12 # This program is free software; you may redistribute it and/or modify it
13 # under the same terms as Perl itself.
15 # The driver script for Pod::Text, Pod::Text::Termcap, and Pod::Text::Color,
16 # invoked by perldoc -t among other things.
20 use Getopt::Long qw(GetOptions);
22 use Pod::Usage qw(pod2usage);
26 # Silence -w warnings.
27 use vars qw($running_under_some_shell);
29 # Take an initial pass through our options, looking for one of the form
30 # -<number>. We turn that into -w <number> for compatibility with the
31 # original pod2text script.
32 for (my $i = 0; $i < @ARGV; $i++) {
33 last if $ARGV[$i] =~ /^--$/;
34 if ($ARGV[$i] =~ /^-(\d+)$/) {
35 splice (@ARGV, $i++, 1, '-w', $1);
39 # Insert -- into @ARGV before any single dash argument to hide it from
40 # Getopt::Long; we want to interpret it as meaning stdin (which Pod::Simple
43 @ARGV = map { $_ eq '-' && !$stdin++ ? ('--', $_) : $_ } @ARGV;
45 # Parse our options. Use the same names as Pod::Text for simplicity, and
46 # default to sentence boundaries turned off for compatibility.
48 $options{sentence} = 0;
49 Getopt::Long::config ('bundling');
50 GetOptions (\%options, 'alt|a', 'code', 'color|c', 'help|h', 'indent|i=i',
51 'loose|l', 'margin|left-margin|m=i', 'overstrike|o',
52 'quotes|q=s', 'sentence|s', 'stderr', 'termcap|t', 'utf8|u',
55 pod2usage (1) if $options{help};
57 # Figure out what formatter we're going to use. -c overrides -t.
58 my $formatter = 'Pod::Text';
59 if ($options{color}) {
60 $formatter = 'Pod::Text::Color';
61 eval { require Term::ANSIColor };
62 if ($@) { die "-c (--color) requires Term::ANSIColor be installed\n" }
63 require Pod::Text::Color;
64 } elsif ($options{termcap}) {
65 $formatter = 'Pod::Text::Termcap';
66 require Pod::Text::Termcap;
67 } elsif ($options{overstrike}) {
68 $formatter = 'Pod::Text::Overstrike';
69 require Pod::Text::Overstrike;
71 delete @options{'color', 'termcap', 'overstrike'};
73 # Initialize and run the formatter.
74 my $parser = $formatter->new (%options);
76 my ($input, $output) = splice (@ARGV, 0, 2);
77 $parser->parse_from_file ($input, $output);
84 pod2text - Convert POD data to formatted ASCII text
87 -aclostu --alt --stderr Allbery --overstrike overstrike --termcap --utf8
92 pod2text [B<-aclostu>] [B<--code>] [B<-i> I<indent>] S<[B<-q> I<quotes>]>
93 [B<--stderr>] S<[B<-w> I<width>]> [I<input> [I<output> ...]]
99 B<pod2text> is a front-end for Pod::Text and its subclasses. It uses them
100 to generate formatted ASCII text from POD source. It can optionally use
101 either termcap sequences or ANSI color escape sequences to format the text.
103 I<input> is the file to read for POD source (the POD can be embedded in
104 code). If I<input> isn't given, it defaults to C<STDIN>. I<output>, if
105 given, is the file to which to write the formatted output. If I<output>
106 isn't given, the formatted output is written to C<STDOUT>. Several POD
107 files can be processed in the same B<pod2text> invocation (saving module
108 load and compile times) by providing multiple pairs of I<input> and
109 I<output> files on the command line.
115 =item B<-a>, B<--alt>
117 Use an alternate output format that, among other things, uses a different
118 heading style and marks C<=item> entries with a colon in the left margin.
122 Include any non-POD text from the input file in the output as well. Useful
123 for viewing code documented with POD blocks with the POD rendered and the
126 =item B<-c>, B<--color>
128 Format the output with ANSI color escape sequences. Using this option
129 requires that Term::ANSIColor be installed on your system.
131 =item B<-i> I<indent>, B<--indent=>I<indent>
133 Set the number of spaces to indent regular text, and the default indentation
134 for C<=over> blocks. Defaults to 4 spaces if this option isn't given.
136 =item B<-h>, B<--help>
138 Print out usage information and exit.
140 =item B<-l>, B<--loose>
142 Print a blank line after a C<=head1> heading. Normally, no blank line is
143 printed after C<=head1>, although one is still printed after C<=head2>,
144 because this is the expected formatting for manual pages; if you're
145 formatting arbitrary text documents, using this option is recommended.
147 =item B<-m> I<width>, B<--left-margin>=I<width>, B<--margin>=I<width>
149 The width of the left margin in spaces. Defaults to 0. This is the margin
150 for all text, including headings, not the amount by which regular text is
151 indented; for the latter, see B<-i> option.
153 =item B<-o>, B<--overstrike>
155 Format the output with overstrike printing. Bold text is rendered as
156 character, backspace, character. Italics and file names are rendered as
157 underscore, backspace, character. Many pagers, such as B<less>, know how
158 to convert this to bold or underlined text.
160 =item B<-q> I<quotes>, B<--quotes>=I<quotes>
162 Sets the quote marks used to surround CE<lt>> text to I<quotes>. If
163 I<quotes> is a single character, it is used as both the left and right
164 quote; if I<quotes> is two characters, the first character is used as the
165 left quote and the second as the right quoted; and if I<quotes> is four
166 characters, the first two are used as the left quote and the second two as
169 I<quotes> may also be set to the special value C<none>, in which case no
170 quote marks are added around CE<lt>> text.
172 =item B<-s>, B<--sentence>
174 Assume each sentence ends with two spaces and try to preserve that spacing.
175 Without this option, all consecutive whitespace in non-verbatim paragraphs
176 is compressed into a single space.
180 By default, B<pod2text> puts any errors detected in the POD input in a POD
181 ERRORS section in the output manual page. If B<--stderr> is given, errors
182 are sent to standard error instead and the POD ERRORS section is
185 =item B<-t>, B<--termcap>
187 Try to determine the width of the screen and the bold and underline
188 sequences for the terminal from termcap, and use that information in
189 formatting the output. Output will be wrapped at two columns less than the
190 width of your terminal device. Using this option requires that your system
191 have a termcap file somewhere where Term::Cap can find it and requires that
192 your system support termios. With this option, the output of B<pod2text>
193 will contain terminal control sequences for your current terminal type.
195 =item B<-u>, B<--utf8>
197 By default, B<pod2text> tries to use the same output encoding as its input
198 encoding (to be backward-compatible with older versions). This option
199 says to instead force the output encoding to UTF-8.
201 Be aware that, when using this option, the input encoding of your POD
202 source must be properly declared unless it is US-ASCII or Latin-1. POD
203 input without an C<=encoding> command will be assumed to be in Latin-1,
204 and if it's actually in UTF-8, the output will be double-encoded. See
205 L<perlpod(1)> for more information on the C<=encoding> command.
207 =item B<-w>, B<--width=>I<width>, B<->I<width>
209 The column at which to wrap text on the right-hand side. Defaults to 76,
210 unless B<-t> is given, in which case it's two columns less than the width of
211 your terminal device.
217 If B<pod2text> fails with errors, see L<Pod::Text> and L<Pod::Simple> for
218 information about what those errors might mean. Internally, it can also
219 produce the following diagnostics:
223 =item -c (--color) requires Term::ANSIColor be installed
225 (F) B<-c> or B<--color> were given, but Term::ANSIColor could not be
228 =item Unknown option: %s
230 (F) An unknown command line option was given.
234 In addition, other L<Getopt::Long> error messages may result from invalid
235 command-line options.
243 If B<-t> is given, B<pod2text> will take the current width of your screen
244 from this environment variable, if available. It overrides terminal width
245 information in TERMCAP.
249 If B<-t> is given, B<pod2text> will use the contents of this environment
250 variable if available to determine the correct formatting sequences for your
251 current terminal device.
257 L<Pod::Text>, L<Pod::Text::Color>, L<Pod::Text::Overstrike>,
258 L<Pod::Text::Termcap>, L<Pod::Simple>, L<perlpod(1)>
260 The current version of this script is always available from its web site at
261 L<http://www.eyrie.org/~eagle/software/podlators/>. It is also part of the
262 Perl core distribution as of 5.6.0.
266 Russ Allbery <rra@stanford.edu>.
268 =head1 COPYRIGHT AND LICENSE
270 Copyright 1999, 2000, 2001, 2004, 2006, 2008 Russ Allbery
273 This program is free software; you may redistribute it and/or modify it
274 under the same terms as Perl itself.