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1242 lines
40 KiB
1242 lines
40 KiB
#############################################################################
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# Pod/Checker.pm -- check pod documents for syntax errors
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#
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# Copyright (C) 1994-2000 by Bradford Appleton. All rights reserved.
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# This file is part of "PodParser". PodParser is free software;
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# you can redistribute it and/or modify it under the same terms
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# as Perl itself.
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#############################################################################
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package Pod::Checker;
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use vars qw($VERSION);
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$VERSION = 1.2; ## Current version of this package
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require 5.005; ## requires this Perl version or later
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use Pod::ParseUtils; ## for hyperlinks and lists
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=head1 NAME
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Pod::Checker, podchecker() - check pod documents for syntax errors
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=head1 SYNOPSIS
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use Pod::Checker;
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$syntax_okay = podchecker($filepath, $outputpath, %options);
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my $checker = new Pod::Checker %options;
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$checker->parse_from_file($filepath, \*STDERR);
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=head1 OPTIONS/ARGUMENTS
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C<$filepath> is the input POD to read and C<$outputpath> is
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where to write POD syntax error messages. Either argument may be a scalar
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indicating a file-path, or else a reference to an open filehandle.
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If unspecified, the input-file it defaults to C<\*STDIN>, and
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the output-file defaults to C<\*STDERR>.
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=head2 podchecker()
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This function can take a hash of options:
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=over 4
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=item B<-warnings> =E<gt> I<val>
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Turn warnings on/off. I<val> is usually 1 for on, but higher values
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trigger additional warnings. See L<"Warnings">.
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=back
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=head1 DESCRIPTION
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B<podchecker> will perform syntax checking of Perl5 POD format documentation.
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I<NOTE THAT THIS MODULE IS CURRENTLY IN THE BETA STAGE!>
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It is hoped that curious/ambitious user will help flesh out and add the
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additional features they wish to see in B<Pod::Checker> and B<podchecker>
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and verify that the checks are consistent with L<perlpod>.
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The following checks are currently preformed:
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=over 4
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=item *
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Unknown '=xxxx' commands, unknown 'XE<lt>...E<gt>' interior-sequences,
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and unterminated interior sequences.
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=item *
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Check for proper balancing of C<=begin> and C<=end>. The contents of such
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a block are generally ignored, i.e. no syntax checks are performed.
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=item *
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Check for proper nesting and balancing of C<=over>, C<=item> and C<=back>.
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=item *
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Check for same nested interior-sequences (e.g.
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C<LE<lt>...LE<lt>...E<gt>...E<gt>>).
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=item *
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Check for malformed or nonexisting entities C<EE<lt>...E<gt>>.
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=item *
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Check for correct syntax of hyperlinks C<LE<lt>...E<gt>>. See L<perlpod>
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for details.
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=item *
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Check for unresolved document-internal links. This check may also reveal
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misspelled links that seem to be internal links but should be links
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to something else.
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=back
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=head1 DIAGNOSTICS
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=head2 Errors
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=over 4
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=item * empty =headn
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A heading (C<=head1> or C<=head2>) without any text? That ain't no
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heading!
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=item * =over on line I<N> without closing =back
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The C<=over> command does not have a corresponding C<=back> before the
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next heading (C<=head1> or C<=head2>) or the end of the file.
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=item * =item without previous =over
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=item * =back without previous =over
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An C<=item> or C<=back> command has been found outside a
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C<=over>/C<=back> block.
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=item * No argument for =begin
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A C<=begin> command was found that is not followed by the formatter
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specification.
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=item * =end without =begin
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A standalone C<=end> command was found.
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=item * Nested =begin's
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There were at least two consecutive C<=begin> commands without
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the corresponding C<=end>. Only one C<=begin> may be active at
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a time.
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=item * =for without formatter specification
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There is no specification of the formatter after the C<=for> command.
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=item * unresolved internal link I<NAME>
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The given link to I<NAME> does not have a matching node in the current
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POD. This also happend when a single word node name is not enclosed in
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C<"">.
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=item * Unknown command "I<CMD>"
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An invalid POD command has been found. Valid are C<=head1>, C<=head2>,
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C<=over>, C<=item>, C<=back>, C<=begin>, C<=end>, C<=for>, C<=pod>,
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C<=cut>
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=item * Unknown interior-sequence "I<SEQ>"
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An invalid markup command has been encountered. Valid are:
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C<BE<lt>E<gt>>, C<CE<lt>E<gt>>, C<EE<lt>E<gt>>, C<FE<lt>E<gt>>,
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C<IE<lt>E<gt>>, C<LE<lt>E<gt>>, C<SE<lt>E<gt>>, C<XE<lt>E<gt>>,
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C<ZE<lt>E<gt>>
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=item * nested commands I<CMD>E<lt>...I<CMD>E<lt>...E<gt>...E<gt>
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Two nested identical markup commands have been found. Generally this
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does not make sense.
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=item * garbled entity I<STRING>
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The I<STRING> found cannot be interpreted as a character entity.
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=item * Entity number out of range
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An entity specified by number (dec, hex, oct) is out of range (1-255).
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=item * malformed link LE<lt>E<gt>
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The link found cannot be parsed because it does not conform to the
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syntax described in L<perlpod>.
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=item * nonempty ZE<lt>E<gt>
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The C<ZE<lt>E<gt>> sequence is supposed to be empty.
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=item * empty XE<lt>E<gt>
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The index entry specified contains nothing but whitespace.
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=item * Spurious text after =pod / =cut
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The commands C<=pod> and C<=cut> do not take any arguments.
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=item * Spurious character(s) after =back
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The C<=back> command does not take any arguments.
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=back
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=head2 Warnings
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These may not necessarily cause trouble, but indicate mediocre style.
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=over 4
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=item * multiple occurence of link target I<name>
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The POD file has some C<=item> and/or C<=head> commands that have
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the same text. Potential hyperlinks to such a text cannot be unique then.
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=item * line containing nothing but whitespace in paragraph
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There is some whitespace on a seemingly empty line. POD is very sensitive
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to such things, so this is flagged. B<vi> users switch on the B<list>
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option to avoid this problem.
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=begin _disabled_
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=item * file does not start with =head
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The file starts with a different POD directive than head.
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This is most probably something you do not want.
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=end _disabled_
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=item * previous =item has no contents
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There is a list C<=item> right above the flagged line that has no
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text contents. You probably want to delete empty items.
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=item * preceding non-item paragraph(s)
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A list introduced by C<=over> starts with a text or verbatim paragraph,
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but continues with C<=item>s. Move the non-item paragraph out of the
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C<=over>/C<=back> block.
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=item * =item type mismatch (I<one> vs. I<two>)
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A list started with e.g. a bulletted C<=item> and continued with a
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numbered one. This is obviously inconsistent. For most translators the
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type of the I<first> C<=item> determines the type of the list.
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=item * I<N> unescaped C<E<lt>E<gt>> in paragraph
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Angle brackets not written as C<E<lt>ltE<gt>> and C<E<lt>gtE<gt>>
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can potentially cause errors as they could be misinterpreted as
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markup commands. This is only printed when the -warnings level is
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greater than 1.
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=item * Unknown entity
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A character entity was found that does not belong to the standard
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ISO set or the POD specials C<verbar> and C<sol>.
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=item * No items in =over
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The list opened with C<=over> does not contain any items.
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=item * No argument for =item
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C<=item> without any parameters is deprecated. It should either be followed
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by C<*> to indicate an unordered list, by a number (optionally followed
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by a dot) to indicate an ordered (numbered) list or simple text for a
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definition list.
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=item * empty section in previous paragraph
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The previous section (introduced by a C<=head> command) does not contain
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any text. This usually indicates that something is missing. Note: A
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C<=head1> followed immediately by C<=head2> does not trigger this warning.
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=item * Verbatim paragraph in NAME section
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The NAME section (C<=head1 NAME>) should consist of a single paragraph
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with the script/module name, followed by a dash `-' and a very short
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description of what the thing is good for.
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=back
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=head2 Hyperlinks
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There are some warnings wrt. malformed hyperlinks.
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=over 4
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=item * ignoring leading/trailing whitespace in link
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There is whitespace at the beginning or the end of the contents of
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LE<lt>...E<gt>.
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=item * (section) in '$page' deprecated
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There is a section detected in the page name of LE<lt>...E<gt>, e.g.
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C<LE<gt>passwd(2)E<gt>>. POD hyperlinks may point to POD documents only.
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Please write C<CE<lt>passwd(2)E<gt>> instead. Some formatters are able
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to expand this to appropriate code. For links to (builtin) functions,
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please say C<LE<lt>perlfunc/mkdirE<gt>>, without ().
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=item * alternative text/node '%s' contains non-escaped | or /
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The characters C<|> and C</> are special in the LE<lt>...E<gt> context.
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Although the hyperlink parser does its best to determine which "/" is
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text and which is a delimiter in case of doubt, one ought to escape
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these literal characters like this:
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/ E<sol>
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| E<verbar>
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=back
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=head1 RETURN VALUE
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B<podchecker> returns the number of POD syntax errors found or -1 if
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there were no POD commands at all found in the file.
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=head1 EXAMPLES
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I<[T.B.D.]>
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=head1 INTERFACE
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While checking, this module collects document properties, e.g. the nodes
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for hyperlinks (C<=headX>, C<=item>) and index entries (C<XE<lt>E<gt>>).
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POD translators can use this feature to syntax-check and get the nodes in
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a first pass before actually starting to convert. This is expensive in terms
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of execution time, but allows for very robust conversions.
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=cut
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#############################################################################
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use strict;
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#use diagnostics;
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use Carp;
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use Exporter;
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use Pod::Parser;
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use vars qw(@ISA @EXPORT);
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@ISA = qw(Pod::Parser);
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@EXPORT = qw(&podchecker);
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use vars qw(%VALID_COMMANDS %VALID_SEQUENCES);
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my %VALID_COMMANDS = (
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'pod' => 1,
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'cut' => 1,
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'head1' => 1,
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'head2' => 1,
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'over' => 1,
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'back' => 1,
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'item' => 1,
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'for' => 1,
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'begin' => 1,
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'end' => 1,
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);
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my %VALID_SEQUENCES = (
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'I' => 1,
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'B' => 1,
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'S' => 1,
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'C' => 1,
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'L' => 1,
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'F' => 1,
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'X' => 1,
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'Z' => 1,
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'E' => 1,
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);
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# stolen from HTML::Entities
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my %ENTITIES = (
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# Some normal chars that have special meaning in SGML context
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amp => '&', # ampersand
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'gt' => '>', # greater than
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'lt' => '<', # less than
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quot => '"', # double quote
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# PUBLIC ISO 8879-1986//ENTITIES Added Latin 1//EN//HTML
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AElig => 'Æ', # capital AE diphthong (ligature)
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Aacute => 'Á', # capital A, acute accent
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Acirc => 'Â', # capital A, circumflex accent
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Agrave => 'À', # capital A, grave accent
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Aring => 'Å', # capital A, ring
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Atilde => 'Ã', # capital A, tilde
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Auml => 'Ä', # capital A, dieresis or umlaut mark
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Ccedil => 'Ç', # capital C, cedilla
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ETH => 'Ð', # capital Eth, Icelandic
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Eacute => 'É', # capital E, acute accent
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Ecirc => 'Ê', # capital E, circumflex accent
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Egrave => 'È', # capital E, grave accent
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Euml => 'Ë', # capital E, dieresis or umlaut mark
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Iacute => 'Í', # capital I, acute accent
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Icirc => 'Î', # capital I, circumflex accent
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Igrave => 'Ì', # capital I, grave accent
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Iuml => 'Ï', # capital I, dieresis or umlaut mark
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Ntilde => 'Ñ', # capital N, tilde
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Oacute => 'Ó', # capital O, acute accent
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Ocirc => 'Ô', # capital O, circumflex accent
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Ograve => 'Ò', # capital O, grave accent
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Oslash => 'Ø', # capital O, slash
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Otilde => 'Õ', # capital O, tilde
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Ouml => 'Ö', # capital O, dieresis or umlaut mark
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THORN => 'Þ', # capital THORN, Icelandic
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Uacute => 'Ú', # capital U, acute accent
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Ucirc => 'Û', # capital U, circumflex accent
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Ugrave => 'Ù', # capital U, grave accent
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Uuml => 'Ü', # capital U, dieresis or umlaut mark
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Yacute => 'Ý', # capital Y, acute accent
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aacute => 'á', # small a, acute accent
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acirc => 'â', # small a, circumflex accent
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aelig => 'æ', # small ae diphthong (ligature)
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agrave => 'à', # small a, grave accent
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aring => 'å', # small a, ring
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atilde => 'ã', # small a, tilde
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auml => 'ä', # small a, dieresis or umlaut mark
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ccedil => 'ç', # small c, cedilla
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eacute => 'é', # small e, acute accent
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ecirc => 'ê', # small e, circumflex accent
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egrave => 'è', # small e, grave accent
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eth => 'ð', # small eth, Icelandic
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euml => 'ë', # small e, dieresis or umlaut mark
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iacute => 'í', # small i, acute accent
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icirc => 'î', # small i, circumflex accent
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igrave => 'ì', # small i, grave accent
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iuml => 'ï', # small i, dieresis or umlaut mark
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ntilde => 'ñ', # small n, tilde
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oacute => 'ó', # small o, acute accent
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ocirc => 'ô', # small o, circumflex accent
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ograve => 'ò', # small o, grave accent
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oslash => 'ø', # small o, slash
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otilde => 'õ', # small o, tilde
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ouml => 'ö', # small o, dieresis or umlaut mark
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szlig => 'ß', # small sharp s, German (sz ligature)
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thorn => 'þ', # small thorn, Icelandic
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uacute => 'ú', # small u, acute accent
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ucirc => 'û', # small u, circumflex accent
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ugrave => 'ù', # small u, grave accent
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uuml => 'ü', # small u, dieresis or umlaut mark
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yacute => 'ý', # small y, acute accent
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yuml => 'ÿ', # small y, dieresis or umlaut mark
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# Some extra Latin 1 chars that are listed in the HTML3.2 draft (21-May-96)
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copy => '©', # copyright sign
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reg => '®', # registered sign
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nbsp => "\240", # non breaking space
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# Additional ISO-8859/1 entities listed in rfc1866 (section 14)
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iexcl => '¡',
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cent => '¢',
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pound => '£',
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curren => '¤',
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yen => '¥',
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brvbar => '¦',
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sect => '§',
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uml => '¨',
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ordf => 'ª',
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laquo => '«',
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'not' => '¬', # not is a keyword in perl
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shy => '',
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macr => '¯',
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deg => '°',
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plusmn => '±',
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sup1 => '¹',
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sup2 => '²',
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sup3 => '³',
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acute => '´',
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micro => 'µ',
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para => '¶',
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middot => '·',
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cedil => '¸',
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ordm => 'º',
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raquo => '»',
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frac14 => '¼',
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frac12 => '½',
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frac34 => '¾',
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iquest => '¿',
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'times' => '×', # times is a keyword in perl
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divide => '÷',
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# some POD special entities
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verbar => '|',
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sol => '/'
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);
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##---------------------------------------------------------------------------
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##---------------------------------
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## Function definitions begin here
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##---------------------------------
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sub podchecker( $ ; $ % ) {
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my ($infile, $outfile, %options) = @_;
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local $_;
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## Set defaults
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$infile ||= \*STDIN;
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$outfile ||= \*STDERR;
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## Now create a pod checker
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my $checker = new Pod::Checker(%options);
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## Now check the pod document for errors
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$checker->parse_from_file($infile, $outfile);
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## Return the number of errors found
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return $checker->num_errors();
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}
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##---------------------------------------------------------------------------
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##-------------------------------
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## Method definitions begin here
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##-------------------------------
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##################################
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=over 4
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=item C<Pod::Checker-E<gt>new( %options )>
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|
|
Return a reference to a new Pod::Checker object that inherits from
|
|
Pod::Parser and is used for calling the required methods later. The
|
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following options are recognized:
|
|
|
|
C<-warnings =E<gt> num>
|
|
Print warnings if C<num> is true. The higher the value of C<num>,
|
|
the more warnings are printed. Currently there are only levels 1 and 2.
|
|
|
|
C<-quiet =E<gt> num>
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If C<num> is true, do not print any errors/warnings. This is useful
|
|
when Pod::Checker is used to munge POD code into plain text from within
|
|
POD formatters.
|
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|
|
=cut
|
|
|
|
## sub new {
|
|
## my $this = shift;
|
|
## my $class = ref($this) || $this;
|
|
## my %params = @_;
|
|
## my $self = {%params};
|
|
## bless $self, $class;
|
|
## $self->initialize();
|
|
## return $self;
|
|
## }
|
|
|
|
sub initialize {
|
|
my $self = shift;
|
|
## Initialize number of errors, and setup an error function to
|
|
## increment this number and then print to the designated output.
|
|
$self->{_NUM_ERRORS} = 0;
|
|
$self->{-quiet} ||= 0;
|
|
# set the error handling subroutine
|
|
$self->errorsub($self->{-quiet} ? sub { 1; } : 'poderror');
|
|
$self->{_commands} = 0; # total number of POD commands encountered
|
|
$self->{_list_stack} = []; # stack for nested lists
|
|
$self->{_have_begin} = ''; # stores =begin
|
|
$self->{_links} = []; # stack for internal hyperlinks
|
|
$self->{_nodes} = []; # stack for =head/=item nodes
|
|
$self->{_index} = []; # text in X<>
|
|
# print warnings?
|
|
$self->{-warnings} = 1 unless(defined $self->{-warnings});
|
|
$self->{_current_head1} = ''; # the current =head1 block
|
|
$self->parseopts(-process_cut_cmd => 1, -warnings => $self->{-warnings});
|
|
}
|
|
|
|
##################################
|
|
|
|
=item C<$checker-E<gt>poderror( @args )>
|
|
|
|
=item C<$checker-E<gt>poderror( {%opts}, @args )>
|
|
|
|
Internal method for printing errors and warnings. If no options are
|
|
given, simply prints "@_". The following options are recognized and used
|
|
to form the output:
|
|
|
|
-msg
|
|
|
|
A message to print prior to C<@args>.
|
|
|
|
-line
|
|
|
|
The line number the error occurred in.
|
|
|
|
-file
|
|
|
|
The file (name) the error occurred in.
|
|
|
|
-severity
|
|
|
|
The error level, should be 'WARNING' or 'ERROR'.
|
|
|
|
=cut
|
|
|
|
# Invoked as $self->poderror( @args ), or $self->poderror( {%opts}, @args )
|
|
sub poderror {
|
|
my $self = shift;
|
|
my %opts = (ref $_[0]) ? %{shift()} : ();
|
|
|
|
## Retrieve options
|
|
chomp( my $msg = ($opts{-msg} || "")."@_" );
|
|
my $line = (exists $opts{-line}) ? " at line $opts{-line}" : "";
|
|
my $file = (exists $opts{-file}) ? " in file $opts{-file}" : "";
|
|
unless (exists $opts{-severity}) {
|
|
## See if can find severity in message prefix
|
|
$opts{-severity} = $1 if ( $msg =~ s/^\**\s*([A-Z]{3,}):\s+// );
|
|
}
|
|
my $severity = (exists $opts{-severity}) ? "*** $opts{-severity}: " : "";
|
|
|
|
## Increment error count and print message "
|
|
++($self->{_NUM_ERRORS})
|
|
if(!%opts || ($opts{-severity} && $opts{-severity} eq 'ERROR'));
|
|
my $out_fh = $self->output_handle() || \*STDERR;
|
|
print $out_fh ($severity, $msg, $line, $file, "\n")
|
|
if($self->{-warnings} || !%opts || $opts{-severity} ne 'WARNING');
|
|
}
|
|
|
|
##################################
|
|
|
|
=item C<$checker-E<gt>num_errors()>
|
|
|
|
Set (if argument specified) and retrieve the number of errors found.
|
|
|
|
=cut
|
|
|
|
sub num_errors {
|
|
return (@_ > 1) ? ($_[0]->{_NUM_ERRORS} = $_[1]) : $_[0]->{_NUM_ERRORS};
|
|
}
|
|
|
|
##################################
|
|
|
|
=item C<$checker-E<gt>name()>
|
|
|
|
Set (if argument specified) and retrieve the canonical name of POD as
|
|
found in the C<=head1 NAME> section.
|
|
|
|
=cut
|
|
|
|
sub name {
|
|
return (@_ > 1 && $_[1]) ?
|
|
($_[0]->{-name} = $_[1]) : $_[0]->{-name};
|
|
}
|
|
|
|
##################################
|
|
|
|
=item C<$checker-E<gt>node()>
|
|
|
|
Add (if argument specified) and retrieve the nodes (as defined by C<=headX>
|
|
and C<=item>) of the current POD. The nodes are returned in the order of
|
|
their occurence. They consist of plain text, each piece of whitespace is
|
|
collapsed to a single blank.
|
|
|
|
=cut
|
|
|
|
sub node {
|
|
my ($self,$text) = @_;
|
|
if(defined $text) {
|
|
$text =~ s/\s+$//s; # strip trailing whitespace
|
|
$text =~ s/\s+/ /gs; # collapse whitespace
|
|
# add node, order important!
|
|
push(@{$self->{_nodes}}, $text);
|
|
# keep also a uniqueness counter
|
|
$self->{_unique_nodes}->{$text}++ if($text !~ /^\s*$/s);
|
|
return $text;
|
|
}
|
|
@{$self->{_nodes}};
|
|
}
|
|
|
|
##################################
|
|
|
|
=item C<$checker-E<gt>idx()>
|
|
|
|
Add (if argument specified) and retrieve the index entries (as defined by
|
|
C<XE<lt>E<gt>>) of the current POD. They consist of plain text, each piece
|
|
of whitespace is collapsed to a single blank.
|
|
|
|
=cut
|
|
|
|
# set/return index entries of current POD
|
|
sub idx {
|
|
my ($self,$text) = @_;
|
|
if(defined $text) {
|
|
$text =~ s/\s+$//s; # strip trailing whitespace
|
|
$text =~ s/\s+/ /gs; # collapse whitespace
|
|
# add node, order important!
|
|
push(@{$self->{_index}}, $text);
|
|
# keep also a uniqueness counter
|
|
$self->{_unique_nodes}->{$text}++ if($text !~ /^\s*$/s);
|
|
return $text;
|
|
}
|
|
@{$self->{_index}};
|
|
}
|
|
|
|
##################################
|
|
|
|
=item C<$checker-E<gt>hyperlink()>
|
|
|
|
Add (if argument specified) and retrieve the hyperlinks (as defined by
|
|
C<LE<lt>E<gt>>) of the current POD. They consist of an 2-item array: line
|
|
number and C<Pod::Hyperlink> object.
|
|
|
|
=back
|
|
|
|
=cut
|
|
|
|
# set/return hyperlinks of the current POD
|
|
sub hyperlink {
|
|
my $self = shift;
|
|
if($_[0]) {
|
|
push(@{$self->{_links}}, $_[0]);
|
|
return $_[0];
|
|
}
|
|
@{$self->{_links}};
|
|
}
|
|
|
|
## overrides for Pod::Parser
|
|
|
|
sub end_pod {
|
|
## Do some final checks and
|
|
## print the number of errors found
|
|
my $self = shift;
|
|
my $infile = $self->input_file();
|
|
my $out_fh = $self->output_handle();
|
|
|
|
if(@{$self->{_list_stack}}) {
|
|
# _TODO_ display, but don't count them for now
|
|
my $list;
|
|
while(($list = $self->_close_list('EOF',$infile)) &&
|
|
$list->indent() ne 'auto') {
|
|
$self->poderror({ -line => 'EOF', -file => $infile,
|
|
-severity => 'ERROR', -msg => "=over on line " .
|
|
$list->start() . " without closing =back" }); #"
|
|
}
|
|
}
|
|
|
|
# check validity of document internal hyperlinks
|
|
# first build the node names from the paragraph text
|
|
my %nodes;
|
|
foreach($self->node()) {
|
|
$nodes{$_} = 1;
|
|
if(/^(\S+)\s+\S/) {
|
|
# we have more than one word. Use the first as a node, too.
|
|
# This is used heavily in perlfunc.pod
|
|
$nodes{$1} ||= 2; # derived node
|
|
}
|
|
}
|
|
foreach($self->idx()) {
|
|
$nodes{$_} = 3; # index node
|
|
}
|
|
foreach($self->hyperlink()) {
|
|
my ($line,$link) = @$_;
|
|
# _TODO_ what if there is a link to the page itself by the name,
|
|
# e.g. in Tk::Pod : L<Tk::Pod/"DESCRIPTION">
|
|
if($link->node() && !$link->page() && $link->type() ne 'hyperlink') {
|
|
my $node = $self->_check_ptree($self->parse_text($link->node(),
|
|
$line), $line, $infile, 'L');
|
|
if($node && !$nodes{$node}) {
|
|
$self->poderror({ -line => $line || '', -file => $infile,
|
|
-severity => 'ERROR',
|
|
-msg => "unresolved internal link '$node'"});
|
|
}
|
|
}
|
|
}
|
|
|
|
# check the internal nodes for uniqueness. This pertains to
|
|
# =headX, =item and X<...>
|
|
foreach(grep($self->{_unique_nodes}->{$_} > 1,
|
|
keys %{$self->{_unique_nodes}})) {
|
|
$self->poderror({ -line => '-', -file => $infile,
|
|
-severity => 'WARNING',
|
|
-msg => "multiple occurence of link target '$_'"});
|
|
}
|
|
|
|
## Print the number of errors found
|
|
my $num_errors = $self->num_errors();
|
|
if ($num_errors > 0) {
|
|
printf $out_fh ("$infile has $num_errors pod syntax %s.\n",
|
|
($num_errors == 1) ? "error" : "errors");
|
|
}
|
|
elsif($self->{_commands} == 0) {
|
|
print $out_fh "$infile does not contain any pod commands.\n";
|
|
$self->num_errors(-1);
|
|
}
|
|
else {
|
|
print $out_fh "$infile pod syntax OK.\n";
|
|
}
|
|
}
|
|
|
|
# check a POD command directive
|
|
sub command {
|
|
my ($self, $cmd, $paragraph, $line_num, $pod_para) = @_;
|
|
my ($file, $line) = $pod_para->file_line;
|
|
## Check the command syntax
|
|
my $arg; # this will hold the command argument
|
|
if (! $VALID_COMMANDS{$cmd}) {
|
|
$self->poderror({ -line => $line, -file => $file, -severity => 'ERROR',
|
|
-msg => "Unknown command '$cmd'" });
|
|
}
|
|
else { # found a valid command
|
|
$self->{_commands}++; # delete this line if below is enabled again
|
|
|
|
##### following check disabled due to strong request
|
|
#if(!$self->{_commands}++ && $cmd !~ /^head/) {
|
|
# $self->poderror({ -line => $line, -file => $file,
|
|
# -severity => 'WARNING',
|
|
# -msg => "file does not start with =head" });
|
|
#}
|
|
|
|
# check syntax of particular command
|
|
if($cmd eq 'over') {
|
|
# check for argument
|
|
$arg = $self->interpolate_and_check($paragraph, $line,$file);
|
|
my $indent = 4; # default
|
|
if($arg && $arg =~ /^\s*(\d+)\s*$/) {
|
|
$indent = $1;
|
|
}
|
|
# start a new list
|
|
$self->_open_list($indent,$line,$file);
|
|
}
|
|
elsif($cmd eq 'item') {
|
|
# are we in a list?
|
|
unless(@{$self->{_list_stack}}) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "=item without previous =over" });
|
|
# auto-open in case we encounter many more
|
|
$self->_open_list('auto',$line,$file);
|
|
}
|
|
my $list = $self->{_list_stack}->[0];
|
|
# check whether the previous item had some contents
|
|
if(defined $self->{_list_item_contents} &&
|
|
$self->{_list_item_contents} == 0) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "previous =item has no contents" });
|
|
}
|
|
if($list->{_has_par}) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "preceding non-item paragraph(s)" });
|
|
delete $list->{_has_par};
|
|
}
|
|
# check for argument
|
|
$arg = $self->interpolate_and_check($paragraph, $line, $file);
|
|
if($arg && $arg =~ /(\S+)/) {
|
|
$arg =~ s/[\s\n]+$//;
|
|
my $type;
|
|
if($arg =~ /^[*]\s*(\S*.*)/) {
|
|
$type = 'bullet';
|
|
$self->{_list_item_contents} = $1 ? 1 : 0;
|
|
$arg = $1;
|
|
}
|
|
elsif($arg =~ /^\d+\.?\s*(\S*)/) {
|
|
$type = 'number';
|
|
$self->{_list_item_contents} = $1 ? 1 : 0;
|
|
$arg = $1;
|
|
}
|
|
else {
|
|
$type = 'definition';
|
|
$self->{_list_item_contents} = 1;
|
|
}
|
|
my $first = $list->type();
|
|
if($first && $first ne $type) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "=item type mismatch ('$first' vs. '$type')"});
|
|
}
|
|
else { # first item
|
|
$list->type($type);
|
|
}
|
|
}
|
|
else {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "No argument for =item" });
|
|
$arg = ' '; # empty
|
|
$self->{_list_item_contents} = 0;
|
|
}
|
|
# add this item
|
|
$list->item($arg);
|
|
# remember this node
|
|
$self->node($arg);
|
|
}
|
|
elsif($cmd eq 'back') {
|
|
# check if we have an open list
|
|
unless(@{$self->{_list_stack}}) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "=back without previous =over" });
|
|
}
|
|
else {
|
|
# check for spurious characters
|
|
$arg = $self->interpolate_and_check($paragraph, $line,$file);
|
|
if($arg && $arg =~ /\S/) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "Spurious character(s) after =back" });
|
|
}
|
|
# close list
|
|
my $list = $self->_close_list($line,$file);
|
|
# check for empty lists
|
|
if(!$list->item() && $self->{-warnings}) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "No items in =over (at line " .
|
|
$list->start() . ") / =back list"}); #"
|
|
}
|
|
}
|
|
}
|
|
elsif($cmd =~ /^head(\d+)/) {
|
|
# check whether the previous =head section had some contents
|
|
if(defined $self->{_commands_in_head} &&
|
|
$self->{_commands_in_head} == 0 &&
|
|
defined $self->{_last_head} &&
|
|
$self->{_last_head} >= $1) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "empty section in previous paragraph"});
|
|
}
|
|
$self->{_commands_in_head} = -1;
|
|
$self->{_last_head} = $1;
|
|
# check if there is an open list
|
|
if(@{$self->{_list_stack}}) {
|
|
my $list;
|
|
while(($list = $self->_close_list($line,$file)) &&
|
|
$list->indent() ne 'auto') {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "=over on line ". $list->start() .
|
|
" without closing =back (at $cmd)" });
|
|
}
|
|
}
|
|
# remember this node
|
|
$arg = $self->interpolate_and_check($paragraph, $line,$file);
|
|
$arg =~ s/[\s\n]+$//s;
|
|
$self->node($arg);
|
|
unless(length($arg)) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "empty =$cmd"});
|
|
}
|
|
if($cmd eq 'head1') {
|
|
$self->{_current_head1} = $arg;
|
|
} else {
|
|
$self->{_current_head1} = '';
|
|
}
|
|
}
|
|
elsif($cmd eq 'begin') {
|
|
if($self->{_have_begin}) {
|
|
# already have a begin
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "Nested =begin's (first at line " .
|
|
$self->{_have_begin} . ")"});
|
|
}
|
|
else {
|
|
# check for argument
|
|
$arg = $self->interpolate_and_check($paragraph, $line,$file);
|
|
unless($arg && $arg =~ /(\S+)/) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "No argument for =begin"});
|
|
}
|
|
# remember the =begin
|
|
$self->{_have_begin} = "$line:$1";
|
|
}
|
|
}
|
|
elsif($cmd eq 'end') {
|
|
if($self->{_have_begin}) {
|
|
# close the existing =begin
|
|
$self->{_have_begin} = '';
|
|
# check for spurious characters
|
|
$arg = $self->interpolate_and_check($paragraph, $line,$file);
|
|
# the closing argument is optional
|
|
#if($arg && $arg =~ /\S/) {
|
|
# $self->poderror({ -line => $line, -file => $file,
|
|
# -severity => 'WARNING',
|
|
# -msg => "Spurious character(s) after =end" });
|
|
#}
|
|
}
|
|
else {
|
|
# don't have a matching =begin
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "=end without =begin" });
|
|
}
|
|
}
|
|
elsif($cmd eq 'for') {
|
|
unless($paragraph =~ /\s*(\S+)\s*/) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "=for without formatter specification" });
|
|
}
|
|
$arg = ''; # do not expand paragraph below
|
|
}
|
|
elsif($cmd =~ /^(pod|cut)$/) {
|
|
# check for argument
|
|
$arg = $self->interpolate_and_check($paragraph, $line,$file);
|
|
if($arg && $arg =~ /(\S+)/) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "Spurious text after =$cmd"});
|
|
}
|
|
}
|
|
$self->{_commands_in_head}++;
|
|
## Check the interior sequences in the command-text
|
|
$self->interpolate_and_check($paragraph, $line,$file)
|
|
unless(defined $arg);
|
|
}
|
|
}
|
|
|
|
sub _open_list
|
|
{
|
|
my ($self,$indent,$line,$file) = @_;
|
|
my $list = Pod::List->new(
|
|
-indent => $indent,
|
|
-start => $line,
|
|
-file => $file);
|
|
unshift(@{$self->{_list_stack}}, $list);
|
|
undef $self->{_list_item_contents};
|
|
$list;
|
|
}
|
|
|
|
sub _close_list
|
|
{
|
|
my ($self,$line,$file) = @_;
|
|
my $list = shift(@{$self->{_list_stack}});
|
|
if(defined $self->{_list_item_contents} &&
|
|
$self->{_list_item_contents} == 0) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "previous =item has no contents" });
|
|
}
|
|
undef $self->{_list_item_contents};
|
|
$list;
|
|
}
|
|
|
|
# process a block of some text
|
|
sub interpolate_and_check {
|
|
my ($self, $paragraph, $line, $file) = @_;
|
|
## Check the interior sequences in the command-text
|
|
# and return the text
|
|
$self->_check_ptree(
|
|
$self->parse_text($paragraph,$line), $line, $file, '');
|
|
}
|
|
|
|
sub _check_ptree {
|
|
my ($self,$ptree,$line,$file,$nestlist) = @_;
|
|
local($_);
|
|
my $text = '';
|
|
# process each node in the parse tree
|
|
foreach(@$ptree) {
|
|
# regular text chunk
|
|
unless(ref) {
|
|
my $count;
|
|
# count the unescaped angle brackets
|
|
# complain only when warning level is greater than 1
|
|
my $i = $_;
|
|
if($count = $i =~ tr/<>/<>/) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "$count unescaped <> in paragraph" })
|
|
if($self->{-warnings} && $self->{-warnings}>1);
|
|
}
|
|
$text .= $i;
|
|
next;
|
|
}
|
|
# have an interior sequence
|
|
my $cmd = $_->cmd_name();
|
|
my $contents = $_->parse_tree();
|
|
($file,$line) = $_->file_line();
|
|
# check for valid tag
|
|
if (! $VALID_SEQUENCES{$cmd}) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => qq(Unknown interior-sequence '$cmd')});
|
|
# expand it anyway
|
|
$text .= $self->_check_ptree($contents, $line, $file, "$nestlist$cmd");
|
|
next;
|
|
}
|
|
if($nestlist =~ /$cmd/) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "nested commands $cmd<...$cmd<...>...>"});
|
|
# _TODO_ should we add the contents anyway?
|
|
# expand it anyway, see below
|
|
}
|
|
if($cmd eq 'E') {
|
|
# preserve entities
|
|
if(@$contents > 1 || ref $$contents[0] || $$contents[0] !~ /^\w+$/) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "garbled entity " . $_->raw_text()});
|
|
next;
|
|
}
|
|
my $ent = $$contents[0];
|
|
my $val;
|
|
if($ent =~ /^0x[0-9a-f]+$/i) {
|
|
# hexadec entity
|
|
$val = hex($ent);
|
|
}
|
|
elsif($ent =~ /^0\d+$/) {
|
|
# octal
|
|
$val = oct($ent);
|
|
}
|
|
elsif($ent =~ /^\d+$/) {
|
|
# numeric entity
|
|
$val = $ent;
|
|
}
|
|
if(defined $val) {
|
|
if($val>0 && $val<256) {
|
|
$text .= chr($val);
|
|
}
|
|
else {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "Entity number out of range " . $_->raw_text()});
|
|
}
|
|
}
|
|
elsif($ENTITIES{$ent}) {
|
|
# known ISO entity
|
|
$text .= $ENTITIES{$ent};
|
|
}
|
|
else {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => "Unknown entity " . $_->raw_text()});
|
|
$text .= "E<$ent>";
|
|
}
|
|
}
|
|
elsif($cmd eq 'L') {
|
|
# try to parse the hyperlink
|
|
my $link = Pod::Hyperlink->new($contents->raw_text());
|
|
unless(defined $link) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "malformed link " . $_->raw_text() ." : $@"});
|
|
next;
|
|
}
|
|
$link->line($line); # remember line
|
|
if($self->{-warnings}) {
|
|
foreach my $w ($link->warning()) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => $w });
|
|
}
|
|
}
|
|
# check the link text
|
|
$text .= $self->_check_ptree($self->parse_text($link->text(),
|
|
$line), $line, $file, "$nestlist$cmd");
|
|
# remember link
|
|
$self->hyperlink([$line,$link]);
|
|
}
|
|
elsif($cmd =~ /[BCFIS]/) {
|
|
# add the guts
|
|
$text .= $self->_check_ptree($contents, $line, $file, "$nestlist$cmd");
|
|
}
|
|
elsif($cmd eq 'Z') {
|
|
if(length($contents->raw_text())) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "Nonempty Z<>"});
|
|
}
|
|
}
|
|
elsif($cmd eq 'X') {
|
|
my $idx = $self->_check_ptree($contents, $line, $file, "$nestlist$cmd");
|
|
if($idx =~ /^\s*$/s) {
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'ERROR',
|
|
-msg => "Empty X<>"});
|
|
}
|
|
else {
|
|
# remember this node
|
|
$self->idx($idx);
|
|
}
|
|
}
|
|
else {
|
|
# not reached
|
|
die "internal error";
|
|
}
|
|
}
|
|
$text;
|
|
}
|
|
|
|
# process a block of verbatim text
|
|
sub verbatim {
|
|
## Nothing particular to check
|
|
my ($self, $paragraph, $line_num, $pod_para) = @_;
|
|
|
|
$self->_preproc_par($paragraph);
|
|
|
|
if($self->{_current_head1} eq 'NAME') {
|
|
my ($file, $line) = $pod_para->file_line;
|
|
$self->poderror({ -line => $line, -file => $file,
|
|
-severity => 'WARNING',
|
|
-msg => 'Verbatim paragraph in NAME section' });
|
|
}
|
|
}
|
|
|
|
# process a block of regular text
|
|
sub textblock {
|
|
my ($self, $paragraph, $line_num, $pod_para) = @_;
|
|
my ($file, $line) = $pod_para->file_line;
|
|
|
|
$self->_preproc_par($paragraph);
|
|
|
|
# skip this paragraph if in a =begin block
|
|
unless($self->{_have_begin}) {
|
|
my $block = $self->interpolate_and_check($paragraph, $line,$file);
|
|
if($self->{_current_head1} eq 'NAME') {
|
|
if($block =~ /^\s*(\S+?)\s*[,-]/) {
|
|
# this is the canonical name
|
|
$self->{-name} = $1 unless(defined $self->{-name});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
sub _preproc_par
|
|
{
|
|
my $self = shift;
|
|
$_[0] =~ s/[\s\n]+$//;
|
|
if($_[0]) {
|
|
$self->{_commands_in_head}++;
|
|
$self->{_list_item_contents}++ if(defined $self->{_list_item_contents});
|
|
if(@{$self->{_list_stack}} && !$self->{_list_stack}->[0]->item()) {
|
|
$self->{_list_stack}->[0]->{_has_par} = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
1;
|
|
|
|
__END__
|
|
|
|
=head1 AUTHOR
|
|
|
|
Brad Appleton E<lt>[email protected]<gt> (initial version),
|
|
Marek Rouchal E<lt>[email protected]<gt>
|
|
|
|
Based on code for B<Pod::Text::pod2text()> written by
|
|
Tom Christiansen E<lt>[email protected]<gt>
|
|
|
|
=cut
|
|
|