#############################################################################
# Pod/Checker.pm -- check pod documents for syntax errors
#
-# Copyright (C) 1994-1999 by Bradford Appleton. All rights reserved.
+# Copyright (C) 1994-2000 by Bradford Appleton. All rights reserved.
# This file is part of "PodParser". PodParser is free software;
# you can redistribute it and/or modify it under the same terms
# as Perl itself.
package Pod::Checker;
use vars qw($VERSION);
-$VERSION = 1.097; ## Current version of this package
-require 5.004; ## requires this Perl version or later
+$VERSION = "1.43_01"; ## Current version of this package
+require 5.005; ## requires this Perl version or later
use Pod::ParseUtils; ## for hyperlinks and lists
$syntax_okay = podchecker($filepath, $outputpath, %options);
my $checker = new Pod::Checker %options;
+ $checker->parse_from_file($filepath, \*STDERR);
=head1 OPTIONS/ARGUMENTS
=item B<-warnings> =E<gt> I<val>
-Turn warnings on/off. See L<"Warnings">.
+Turn warnings on/off. I<val> is usually 1 for on, but higher values
+trigger additional warnings. See L<"Warnings">.
=back
B<podchecker> will perform syntax checking of Perl5 POD format documentation.
-I<NOTE THAT THIS MODULE IS CURRENTLY IN THE BETA STAGE!>
+Curious/ambitious users are welcome to propose additional features they wish
+to see in B<Pod::Checker> and B<podchecker> and verify that the checks are
+consistent with L<perlpod>.
-It is hoped that curious/ambitious user will help flesh out and add the
-additional features they wish to see in B<Pod::Checker> and B<podchecker>
-and verify that the checks are consistent with L<perlpod>.
-
-The following checks are preformed:
+The following checks are currently performed:
=over 4
=item *
-Unknown '=xxxx' commands, unknown 'X<...>' interior-sequences,
+Unknown '=xxxx' commands, unknown 'XE<lt>...E<gt>' interior-sequences,
and unterminated interior sequences.
=item *
=item *
-Check for malformed or nonexisting entities C<EE<lt>...E<gt>>.
+Check for malformed or non-existing entities C<EE<lt>...E<gt>>.
=item *
=back
-=head2 Additional Features
-
-While checking, this module collects document properties, e.g. the nodes
-for hyperlinks (C<=headX>, C<=item>). POD translators can use this feature
-to syntax-check and get the nodes in a first pass before actually starting
-to convert. This is expensive in terms of execution time, but allows for
-very robust conversions.
-
=head1 DIAGNOSTICS
=head2 Errors
=item * unresolved internal link I<NAME>
The given link to I<NAME> does not have a matching node in the current
-POD. This also happend when a single word node name is not enclosed in
+POD. This also happened when a single word node name is not enclosed in
C<"">.
=item * Unknown command "I<CMD>"
An invalid POD command has been found. Valid are C<=head1>, C<=head2>,
-C<=over>, C<=item>, C<=back>, C<=begin>, C<=end>, C<=for>, C<=pod>,
-C<=cut>
+C<=head3>, C<=head4>, C<=over>, C<=item>, C<=back>, C<=begin>, C<=end>,
+C<=for>, C<=pod>, C<=cut>
=item * Unknown interior-sequence "I<SEQ>"
The C<ZE<lt>E<gt>> sequence is supposed to be empty.
+=item * empty XE<lt>E<gt>
+
+The index entry specified contains nothing but whitespace.
+
=item * Spurious text after =pod / =cut
The commands C<=pod> and C<=cut> do not take any arguments.
=over 4
-=item * multiple occurence of link target I<name>
+=item * multiple occurrence of link target I<name>
The POD file has some C<=item> and/or C<=head> commands that have
the same text. Potential hyperlinks to such a text cannot be unique then.
+This warning is printed only with warning level greater than one.
=item * line containing nothing but whitespace in paragraph
to such things, so this is flagged. B<vi> users switch on the B<list>
option to avoid this problem.
+=begin _disabled_
+
=item * file does not start with =head
The file starts with a different POD directive than head.
This is most probably something you do not want.
-=item * No numeric argument for =over
-
-The C<=over> command is supposed to have a numeric argument (the
-indentation).
+=end _disabled_
=item * previous =item has no contents
=item * =item type mismatch (I<one> vs. I<two>)
-A list started with e.g. a bulletted C<=item> and continued with a
+A list started with e.g. a bullet-like C<=item> and continued with a
numbered one. This is obviously inconsistent. For most translators the
type of the I<first> C<=item> determines the type of the list.
Angle brackets not written as C<E<lt>ltE<gt>> and C<E<lt>gtE<gt>>
can potentially cause errors as they could be misinterpreted as
-markup commands.
+markup commands. This is only printed when the -warnings level is
+greater than 1.
=item * Unknown entity
with the script/module name, followed by a dash `-' and a very short
description of what the thing is good for.
-=item * Hyperlinks
+=item * =headI<n> without preceding higher level
+
+For example if there is a C<=head2> in the POD file prior to a
+C<=head1>.
+
+=back
+
+=head2 Hyperlinks
+
+There are some warnings with respect to malformed hyperlinks:
+
+=over 4
+
+=item * ignoring leading/trailing whitespace in link
+
+There is whitespace at the beginning or the end of the contents of
+LE<lt>...E<gt>.
-There are some warnings wrt. hyperlinks:
-Leading/trailing whitespace, newlines in hyperlinks,
-brackets C<()>.
+=item * (section) in '$page' deprecated
+
+There is a section detected in the page name of LE<lt>...E<gt>, e.g.
+C<LE<lt>passwd(2)E<gt>>. POD hyperlinks may point to POD documents only.
+Please write C<CE<lt>passwd(2)E<gt>> instead. Some formatters are able
+to expand this to appropriate code. For links to (builtin) functions,
+please say C<LE<lt>perlfunc/mkdirE<gt>>, without ().
+
+=item * alternative text/node '%s' contains non-escaped | or /
+
+The characters C<|> and C</> are special in the LE<lt>...E<gt> context.
+Although the hyperlink parser does its best to determine which "/" is
+text and which is a delimiter in case of doubt, one ought to escape
+these literal characters like this:
+
+ / E<sol>
+ | E<verbar>
=back
=head1 EXAMPLES
-I<[T.B.D.]>
+See L</SYNOPSIS>
-=head1 AUTHOR
+=head1 INTERFACE
-Brad Appleton E<lt>bradapp@enteract.comE<gt> (initial version),
-Marek Rouchal E<lt>marek@saftsack.fs.uni-bayreuth.deE<gt>
-
-Based on code for B<Pod::Text::pod2text()> written by
-Tom Christiansen E<lt>tchrist@mox.perl.comE<gt>
+While checking, this module collects document properties, e.g. the nodes
+for hyperlinks (C<=headX>, C<=item>) and index entries (C<XE<lt>E<gt>>).
+POD translators can use this feature to syntax-check and get the nodes in
+a first pass before actually starting to convert. This is expensive in terms
+of execution time, but allows for very robust conversions.
+
+Since PodParser-1.24 the B<Pod::Checker> module uses only the B<poderror>
+method to print errors and warnings. The summary output (e.g.
+"Pod syntax OK") has been dropped from the module and has been included in
+B<podchecker> (the script). This allows users of B<Pod::Checker> to
+control completely the output behavior. Users of B<podchecker> (the script)
+get the well-known behavior.
=cut
'cut' => 1,
'head1' => 1,
'head2' => 1,
+ 'head3' => 1,
+ 'head4' => 1,
'over' => 1,
'back' => 1,
'item' => 1,
'for' => 1,
'begin' => 1,
'end' => 1,
+ 'encoding' => '1',
);
my %VALID_SEQUENCES = (
## Now create a pod checker
my $checker = new Pod::Checker(%options);
- $checker->parseopts(-process_cut_cmd => 1);
## Now check the pod document for errors
$checker->parse_from_file($infile, $outfile);
-
+
## Return the number of errors found
return $checker->num_errors();
}
## Method definitions begin here
##-------------------------------
+##################################
+
+=over 4
+
+=item C<Pod::Checker-E<gt>new( %options )>
+
+Return a reference to a new Pod::Checker object that inherits from
+Pod::Parser and is used for calling the required methods later. The
+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>
+ 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.
+
+=cut
+
## sub new {
## my $this = shift;
## my $class = ref($this) || $this;
## 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->errorsub('poderror'); # set the error handling subroutine
+ $self->{_NUM_WARNINGS} = 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 $self = shift;
## Increment error count and print message "
++($self->{_NUM_ERRORS})
if(!%opts || ($opts{-severity} && $opts{-severity} eq 'ERROR'));
- my $out_fh = $self->output_handle();
- print $out_fh ($severity, $msg, $line, $file, "\n")
- if($self->{-warnings} || !%opts || $opts{-severity} ne 'WARNING');
+ ++($self->{_NUM_WARNINGS})
+ if(!%opts || ($opts{-severity} && $opts{-severity} eq 'WARNING'));
+ unless($self->{-quiet}) {
+ my $out_fh = $self->output_handle() || \*STDERR;
+ print $out_fh ($severity, $msg, $line, $file, "\n")
+ if($self->{-warnings} || !%opts || $opts{-severity} ne 'WARNING');
+ }
}
-# set/retrieve the number of errors found
+##################################
+
+=item C<$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]) : $_[0]->{_NUM_ERRORS};
}
-# set and/or retrieve canonical name of POD
+##################################
+
+=item C<$checker-E<gt>num_warnings()>
+
+Set (if argument specified) and retrieve the number of warnings found.
+
+=cut
+
+sub num_warnings {
+ return (@_ > 1) ? ($_[0]->{_NUM_WARNINGS} = $_[1]) : $_[0]->{_NUM_WARNINGS};
+}
+
+##################################
+
+=item C<$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]) : $_[0]->{-name};
}
-# set/return nodes of the current POD
+##################################
+
+=item C<$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 occurrence. They consist of plain text, each piece of whitespace is
+collapsed to a single blank.
+
+=cut
+
sub node {
my ($self,$text) = @_;
if(defined $text) {
# add node, order important!
push(@{$self->{_nodes}}, $text);
# keep also a uniqueness counter
- $self->{_unique_nodes}->{$text}++;
+ $self->{_unique_nodes}->{$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 a 2-item array: line
+number and C<Pod::Hyperlink> object.
+
+=back
+
+=cut
+
# set/return hyperlinks of the current POD
sub hyperlink {
my $self = shift;
## 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)) &&
$list->indent() ne 'auto') {
my %nodes;
foreach($self->node()) {
$nodes{$_} = 1;
- if(/^(\S+)\s+/) {
+ 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 $line = '';
- s/^(\d+):// && ($line = $1);
- if($_ && !$nodes{$_}) {
- $self->poderror({ -line => $line, -file => $infile,
- -severity => 'ERROR',
- -msg => "unresolved internal link '$_'"});
+ 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'"});
+ }
}
}
- foreach(grep($self->{_unique_nodes}->{$_} > 1,
- keys %{$self->{_unique_nodes}})) {
- $self->poderror({ -line => '-', -file => $infile,
+
+ # check the internal nodes for uniqueness. This pertains to
+ # =headX, =item and X<...>
+ if($self->{-warnings} && $self->{-warnings}>1) {
+ foreach(grep($self->{_unique_nodes}->{$_} > 1,
+ keys %{$self->{_unique_nodes}})) {
+ $self->poderror({ -line => '-', -file => $infile,
-severity => 'WARNING',
- -msg => "multiple occurence of link target '$_'"});
+ -msg => "multiple occurrence 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";
- }
+ # no POD found here
+ $self->num_errors(-1) if($self->{_commands} == 0);
}
# check a POD command directive
$self->poderror({ -line => $line, -file => $file, -severity => 'ERROR',
-msg => "Unknown command '$cmd'" });
}
- else {
- # found a valid command
- 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
+ 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;
- } else {
- $self->poderror({ -line => $line, -file => $file,
- -severity => 'WARNING',
- -msg => "No numeric argument for =over"});
}
# start a new list
$self->_open_list($indent,$line,$file);
}
}
elsif($cmd =~ /^head(\d+)/) {
+ my $hnum = $1;
+ $self->{"_have_head_$hnum"}++; # count head types
+ if($hnum > 1 && !$self->{"_have_head_".($hnum -1)}) {
+ $self->poderror({ -line => $line, -file => $file,
+ -severity => 'WARNING',
+ -msg => "=head$hnum without preceding higher level"});
+ }
+ # 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->{_last_head} >= $hnum) {
$self->poderror({ -line => $line, -file => $file,
-severity => 'WARNING',
-msg => "empty section in previous paragraph"});
}
$self->{_commands_in_head} = -1;
- $self->{_last_head} = $1;
+ $self->{_last_head} = $hnum;
# check if there is an open list
if(@{$self->{_list_stack}}) {
my $list;
foreach(@$ptree) {
# regular text chunk
unless(ref) {
- my $count;
# count the unescaped angle brackets
- my $i = $_;
- if($count = $i =~ tr/<>/<>/) {
+ # complain only when warning level is greater than 1
+ if($self->{-warnings} && $self->{-warnings}>1) {
+ my $count;
+ if($count = tr/<>/<>/) {
$self->poderror({ -line => $line, -file => $file,
-severity => 'WARNING',
- -msg => "$count unescaped <> in paragraph" })
- if($self->{-warnings});
+ -msg => "$count unescaped <> in paragraph" });
+ }
}
- $text .= $i;
+ $text .= $_;
next;
}
# have an interior sequence
}
if($nestlist =~ /$cmd/) {
$self->poderror({ -line => $line, -file => $file,
- -severity => 'ERROR',
+ -severity => 'WARNING',
-msg => "nested commands $cmd<...$cmd<...>...>"});
# _TODO_ should we add the contents anyway?
# expand it anyway, see below
# check the link text
$text .= $self->_check_ptree($self->parse_text($link->text(),
$line), $line, $file, "$nestlist$cmd");
- my $node = '';
- # remember internal link
- # _TODO_ what if there is a link to the page itself by the name,
- # e.g. in Tk::Pod : L<Tk::Pod/"DESCRIPTION">
- if($link->node() && !$link->page() && $link->type() ne 'hyperlink') {
- $node = $self->_check_ptree($self->parse_text($link->node(),
- $line), $line, $file, "$nestlist$cmd");
- $self->hyperlink("$line:$node") if($node);
- }
+ # remember link
+ $self->hyperlink([$line,$link]);
}
elsif($cmd =~ /[BCFIS]/) {
# add the guts
-msg => "Nonempty Z<>"});
}
}
- else { # X<>
- # check, but add nothing to $text
- $self->_check_ptree($contents, $line, $file, "$nestlist$cmd");
+ elsif($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;
}
-# _TODO_ overloadable methods for BC..Z<...> expansion?
-
# process a block of verbatim text
sub verbatim {
## Nothing particular to check
1;
+__END__
+
+=head1 AUTHOR
+
+Please report bugs using L<http://rt.cpan.org>.
+
+Brad Appleton E<lt>bradapp@enteract.comE<gt> (initial version),
+Marek Rouchal E<lt>marekr@cpan.orgE<gt>
+
+Based on code for B<Pod::Text::pod2text()> written by
+Tom Christiansen E<lt>tchrist@mox.perl.comE<gt>
+
+=cut
+
projects / p5sagit/p5-mst-13.2.git / blobdiff