5 unshift @INC, "../lib";
10 use feature 'unicode_strings';
21 require '../regen/regen_lib.pl';
30 podcheck.t - Look for possible problems in the Perl pods
35 ./perl -I../lib porting/podcheck.t [--show_all] [--cpan] [--deltas]
36 [--counts] [ FILE ...]
37 ./perl -I../lib porting/podcheck.t --add_link MODULE ...
39 ./perl -I../lib porting/podcheck.t --regen
43 podcheck.t is an extension of Pod::Checker. It looks for pod errors and
44 potential errors in the files given as arguments, or if none specified, in all
45 pods in the distribution workspace, except certain known special ones
46 (specified below). It does additional checking beyond that done by
47 Pod::Checker, and keeps a database of known potential problems, and will
48 fail a pod only if the number of such problems differs from that given in the
49 database. It also suppresses the C<(section) deprecated> message from
50 Pod::Checker, since specifying the man page section number is quite proper to do.
52 The additional checks it makes are:
56 =item Cross-pod link checking
58 Pod::Checker verifies that links to an internal target in a pod are not
59 broken. podcheck.t extends that (when called without FILE arguments) to
60 external links. It does this by gathering up all the possible targets in the
61 workspace, and cross-checking them. It also checks that a non-broken link
62 points to just one target. (The destination pod could have two targets with
65 The way that the C<LE<lt>E<gt>> pod command works (for links outside the pod)
66 is to actually create a link to C<search.cpan.org> with an embedded query for
67 the desired pod or man page. That means that links outside the distribution
68 are valid. podcheck.t doesn't verify the validity of such links, but instead
69 keeps a data base of those known to be valid. This means that if a link to a
70 target not on the list is created, the target needs to be added to the data
71 base. This is accomplished via the L<--add_link|/--add_link MODULE ...>
72 option to podcheck.t, described below.
74 =item An internal link that isn't so specified
76 If a link is broken, but there is an existing internal target of the same
77 name, it is likely that the internal target was meant, and the C<"/"> is
78 missing from the C<LE<lt>E<gt>> pod command.
80 =item Verbatim paragraphs that wrap in an 80 (including 1 spare) column window
82 It's annoying to have lines wrap when displaying pod documentation in a
83 terminal window. This checks that all verbatim lines fit in a standard 80
84 column window, even when using a pager that reserves a column for its own use.
85 (Thus the check is for a net of 79 columns.)
86 For those lines that don't fit, it tells you how much needs to be cut in
89 Often, the easiest thing to do to gain space for these is to lower the indent
92 =item Missing or duplicate NAME or missing NAME short description
94 A pod can't be linked to unless it has a unique name.
95 And a NAME should have a dash and short description after it.
97 =item =encoding statement issues
99 This indicates if an C<=encoding> statement should be present, or moved to the
102 =item Items that perhaps should be links
104 There are mentions of apparent files in the pods that perhaps should be links
105 instead, using C<LE<lt>...E<gt>>
107 =item Items that perhaps should be C<FE<lt>...E<gt>>
109 What look like path names enclosed in C<CE<lt>...E<gt>> should perhaps have
110 C<FE<lt>...E<gt>> mark-up instead.
114 A number of issues raised by podcheck.t and by the base Pod::Checker are not
115 really problems, but merely potential problems, that is, false positives.
116 After inspecting them and
117 deciding that they aren't real problems, it is possible to shut up this program
118 about them, unlike base Pod::Checker. For a valid link to an outside module
119 or man page, call podcheck.t with the C<--add_link> option to add it to the
120 the database of known links; for other causes, call podcheck.t with the C<--regen>
121 option to regenerate the entire database. This tells it that all existing
122 issues are to not be mentioned again.
124 C<--regen> isn't fool-proof. The database merely keeps track of the number of these
125 potential problems of each type for each pod. If a new problem of a given
126 type is introduced into the pod, podcheck.t will spit out all of them. You
127 then have to figure out which is the new one, and should it be changed or not.
128 But doing it this way insulates the database from having to keep track of line
129 numbers of problems, which may change, or the exact wording of each problem
130 which might also change without affecting whether it is a problem or not.
132 Also, if the count of potential problems of a given type for a pod decreases,
133 the database must be regenerated so that it knows the new number. The program
134 gives instructions when this happens.
136 Some pods will have varying numbers of problems of a given type. This can
137 be handled by manually editing the database file (see L</FILES>), and setting
138 the number of those problems for that pod to a negative number. This will
139 cause the corresponding error to always be suppressed no matter how many there
142 Another problem is that there is currently no check that modules listed as
143 valid in the data base
144 actually are. Thus any errors introduced there will remain there.
146 =head2 Specially handled pods
152 This pod is generated by pasting bits from other pods. Errors in those bits
153 will show up as errors here, as well as for those other pods. Therefore
154 errors here are suppressed, and the pod is checked only to verify that nodes
155 within it actually exist that are externally linked to.
159 The current perldelta pod is initialized from a template that contains
160 placeholder text. Some of this text is in the form of links that don't really
161 exist. Any such links that are listed in C<@perldelta_ignore_links> will not
162 generate messages. It is presumed that these links will be cleaned up when
163 the perldelta is cleaned up for release since they should be marked with
166 =item Porting/perldelta_template.pod
168 This is not a pod, but a template for C<perldelta>. Any errors introduced
169 here will show up when C<perldelta> is created from it.
171 =item cpan-upstream pods
173 See the L</--cpan> option documentation
177 See the L</--deltas> option documentation
185 =item --add_link MODULE ...
187 Use this option to teach podcheck.t that the C<MODULE>s or man pages actually
188 exist, and to silence any messages that links to them are broken.
190 podcheck.t checks that links within the Perl core distribution are valid, but
191 it doesn't check links to man pages or external modules. When it finds
192 a broken link, it checks its data base of external modules and man pages,
193 and only if not found there does it raise a message. This option just adds
194 the list of modules and man page references that follow it on the command line
200 ./perl -I../lib porting/podcheck.t --add_link Unicode::Casing
202 causes the external module "Unicode::Casing" to be added to the data base, so
203 C<LE<lt>Unicode::Casing<gt>> will be considered valid.
207 Regenerate the data base used by podcheck.t to include all the existing
208 potential problems. Future runs of the program will not then flag any of
213 Normally, all pods in the cpan directory are skipped, except to make sure that
214 any blead-upstream links to such pods are valid.
215 This option will cause cpan upstream pods to be fully checked.
219 Normally, all old perldelta pods are skipped, except to make sure that
220 any links to such pods are valid. This is because they are considered
221 stable, and perhaps trying to fix them will cause changes that will
222 misrepresent Perl's history. But, this option will cause them to be fully
227 Normally, if the number of potential problems of a given type found for a
228 pod matches the expected value in the database, they will not be displayed.
229 This option forces the database to be ignored during the run, so all potential
230 problems are displayed and will fail their respective pod test. Specifying
231 any particular FILES to operate on automatically selects this option.
235 Instead of testing, this just dumps the counts of the occurrences of the
236 various types of potential problems in the data base.
242 The database is stored in F<t/porting/known_pod_issues.dat>
250 # VMS builds have a '.com' appended to utility and script names, and it adds a
251 # trailing dot for any other file name that doesn't have a dot in it. The db
252 # is stored without those things. This regex allows for these special file
253 # names to be dealt with. It needs to be interpolated into a larger regex
254 # that furnishes the closing boundary.
255 my $vms_re = qr/ \. (?: com )? /x;
257 # Some filenames in the MANIFEST match $vms_re, and so must not be handled the
258 # same way that that the special vms ones are. This hash lists those.
259 my %special_vms_files;
261 # This is to get this to work across multiple file systems, including those
262 # that are not case sensitive. The db is stored in lower case, Un*x style,
263 # and all file name comparisons are done that way.
264 sub canonicalize($) {
266 my ($volume, $directories, $file)
267 = File::Spec->splitpath(File::Spec->canonpath($input));
268 # Assumes $volume is constant for everything in this directory structure
269 $directories = "" if ! $directories;
270 $file = "" if ! $file;
271 $file = lc join '/', File::Spec->splitdir($directories), $file;
272 $file =~ s! / /+ !/!gx; # Multiple slashes => single slash
274 # The db is stored without the special suffixes that are there in VMS, so
275 # strip them off to get the comparable name. But some files on all
276 # platforms have these suffixes, so this shouldn't happen for them, as any
277 # of their db entries will have the suffixes in them. The hash has been
278 # populated with these files.
280 && $file =~ / ( $vms_re ) $ /x
281 && ! exists $special_vms_files{$file})
283 $file =~ s/ $1 $ //x;
288 #####################################################
289 # HOW IT WORKS (in general)
291 # If not called with specific files to check, the directory structure is
292 # examined for files that have pods in them. Files that might not have to be
293 # fully parsed (e.g. in cpan) are parsed enough at this time to find their
294 # pod's NAME, and to get a checksum.
296 # Those kinds of files are sorted last, but otherwise the pods are parsed with
297 # the package coded here, My::Pod::Checker, which is an extension to
298 # Pod::Checker that adds some tests and suppresses others that aren't
299 # appropriate. The latter module has no provision for capturing diagnostics,
300 # so a package, Tie_Array_to_FH, is used to force them to be placed into an
301 # array instead of printed.
303 # Parsing the files builds up a list of links. The files are gone through
304 # again, doing cross-link checking and outputting all saved-up problems with
307 # Sorting the files last that potentially don't need to be fully parsed allows
308 # us to not parse them unless there is a link to an internal anchor in them
309 # from something that we have already parsed. Keeping checksums allows us to
310 # not parse copies of other pods.
312 #####################################################
314 # 1 => Exclude low priority messages that aren't likely to be problems, and
315 # has many false positives; higher numbers give more messages.
316 my $Warnings_Level = 200;
318 # perldelta during construction may have place holder links. N.B. This
319 # variable is referred to by name in release_managers_guide.pod
320 our @perldelta_ignore_links = ( "XXX", "perl5YYYdelta", "perldiag/message" );
322 # To see if two pods with the same NAME are actually copies of the same pod,
323 # which is not an error, it uses a checksum to save work.
324 my $digest_type = "SHA-1";
326 my $original_dir = File::Spec->rel2abs(File::Spec->curdir);
327 my $data_dir = File::Spec->catdir($original_dir, 'porting');
328 my $known_issues = File::Spec->catfile($data_dir, 'known_pod_issues.dat');
329 my $MANIFEST = File::Spec->catfile(File::Spec->updir($original_dir), 'MANIFEST');
332 my $MAX_LINE_LENGTH = 79; # 79 columns
333 my $INDENT = 7; # default nroff indent
335 # Our warning messages. Better not have [('"] in them, as those are used as
336 # delimiters for variable parts of the messages by poderror.
337 my $line_length = "Verbatim line length including indents exceeds $MAX_LINE_LENGTH by";
338 my $broken_link = "Apparent broken link";
339 my $broken_internal_link = "Apparent internal link is missing its forward slash";
340 my $see_not_linked = "? Should you be using L<...> instead of";
341 my $C_with_slash = "? Should you be using F<...> or maybe L<...> instead of";
342 my $multiple_targets = "There is more than one target";
343 my $duplicate_name = "Pod NAME already used";
344 my $need_encoding = "Should have =encoding statement because have non-ASCII";
345 my $encoding_first = "=encoding must be first command (if present)";
346 my $no_name = "There is no NAME";
347 my $missing_name_description = "The NAME should have a dash and short description after it";
349 # objects, tests, etc can't be pods, so don't look for them. Also skip
350 # files output by the patch program. Could also ignore most of .gitignore
351 # files, but not all, so don't.
353 my $obj_ext = $Config{'obj_ext'}; $obj_ext =~ tr/.//d; # dot will be added back
354 my $lib_ext = $Config{'lib_ext'}; $lib_ext =~ tr/.//d;
355 my $lib_so = $Config{'so'}; $lib_so =~ tr/.//d;
356 my $dl_ext = $Config{'dlext'}; $dl_ext =~ tr/.//d;
358 # Not really pods, but can look like them.
359 my %excluded_files = (
360 canonicalize("lib/unicore/mktables") => 1,
361 canonicalize("Porting/make-rmg-checklist") => 1,
362 canonicalize("Porting/perldelta_template.pod") => 1,
363 canonicalize("regen/feature.pl") => 1,
364 canonicalize("autodoc.pl") => 1,
365 canonicalize("configpm") => 1,
366 canonicalize("miniperl") => 1,
367 canonicalize("perl") => 1,
368 canonicalize('dist/Pod-Perldoc/corpus/no-head.pod') => 1,
369 canonicalize('dist/Pod-Perldoc/corpus/perlfunc.pod') => 1,
370 canonicalize('dist/Pod-Perldoc/corpus/utf8.pod') => 1,
371 canonicalize("lib/unicore/mktables") => 1,
374 # This list should not include anything for which case sensitivity is
375 # important, as it won't work on VMS, and won't show up until tested on VMS.
376 # All or almost all such files should be listed in the MANIFEST, so that can
377 # be examined for them, and each such file explicitly excluded, as is done for
378 # .PL files in the loop just below this. For files not catchable this way,
379 # is_pod_file() can be used to exclude these at a finer grained level.
380 my $non_pods = qr/ (?: \.
381 (?: [achot] | zip | gz | bz2 | jar | tar | tgz
382 | orig | rej | patch # Patch program output
383 | sw[op] | \#.* # Editor droppings
384 | old # buildtoc output
385 | xs # pod should be in the .pm file
386 | al # autosplit files
387 | bs # bootstrap files
388 | (?i:sh) # shell scripts, hints, templates
389 | lst # assorted listing files
390 | bat # Windows,Netware,OS2 batch files
391 | cmd # Windows,Netware,OS2 command files
392 | lis # VMS compiler listings
393 | map # VMS linker maps
394 | opt # VMS linker options files
395 | mms # MM(K|S) description files
396 | ts # timestamp files generated during build
397 | $obj_ext # object files
398 | exe # $Config{'exe_ext'} might be empty string
399 | $lib_ext # object libraries
400 | $lib_so # shared libraries
401 | $dl_ext # dynamic libraries
404 ) | ~$ | \ \(Autosaved\)\.txt$ # Other editor droppings
405 | ^cxx\$demangler_db\.$ # VMS name mangler database
406 | ^typemap\.?$ # typemap files
407 | ^(?i:Makefile\.PL)$
410 # '.PL' files should be excluded, as they aren't final pods, but often contain
411 # material used in generating pods, and so can look like a pod. We can't use
412 # the regexp above because case sensisitivity is important for these, as some
413 # '.pl' files should be examined for pods. Instead look through the MANIFEST
414 # for .PL files and get their full path names, so we can exclude each such
415 # file explicitly. This works because other porting tests prohibit having two
416 # files with the same names except for case.
417 open my $manifest_fh, '<:bytes', $MANIFEST or die "Can't open $MANIFEST";
418 while (<$manifest_fh>) {
420 # While we have MANIFEST open, on VMS platforms, look for files that match
421 # the magic VMS file names that have to be handled specially. Add these
422 # to the list of them.
423 if ($^O eq 'VMS' && / ^ ( [^\t]* $vms_re ) \t /x) {
424 $special_vms_files{$1} = 1;
426 if (/ ^ ( [^\t]* \. PL ) \t /x) {
427 $excluded_files{canonicalize($1)} = 1;
430 close $manifest_fh, or die "Can't close $MANIFEST";
433 # Pod::Checker messages to suppress
434 my @suppressed_messages = (
435 "(section) in", # Checker is wrong to flag this
436 "multiple occurrence of link target", # We catch independently the ones
437 # that are real problems.
439 "Entity number out of range", # Checker outputs this for anything above
440 # 255, but in fact all Unicode is valid
444 # Returns bool as to if input message is one that is to be suppressed
447 return grep { $message =~ /^\Q$_/i } @suppressed_messages;
450 { # Closure to contain a simple subset of test.pl. This is to get rid of the
451 # unnecessary 'failed at' messages that would otherwise be output pointing
452 # to a particular line in this file.
454 my $current_test = 0;
459 $planned = $plan{tests};
460 print "1..$planned\n";
471 print "not " unless $success;
472 print "ok $current_test - $message\n";
478 my $n = @_ ? shift : 1;
481 print "ok $current_test # skip $why\n";
483 no warnings 'exiting';
492 print $message =~ s/^/# /mgr;
498 if ($planned && $planned != $current_test) {
500 "# Looks like you planned $planned tests but ran $current_test.\n";
505 # List of known potential problems by pod and type.
508 # Pods given by the keys contain an interior node that is referred to from
510 my %has_referred_to_node;
517 my $do_upstream_cpan = 0; # Assume that are to skip anything in /cpan
518 my $do_deltas = 0; # And stable perldeltas
520 while (@ARGV && substr($ARGV[0], 0, 1) eq '-') {
521 my $arg = shift @ARGV;
523 $arg =~ s/^--/-/; # Treat '--' the same as a single '-'
524 if ($arg eq '-regen') {
527 elsif ($arg eq '-add_link') {
530 elsif ($arg eq '-cpan') {
531 $do_upstream_cpan = 1;
533 elsif ($arg eq '-deltas') {
536 elsif ($arg eq '-show_all') {
539 elsif ($arg eq '-counts') {
544 Unknown option '$arg'
546 Usage: $0 [ --regen | --cpan | --show_all | FILE ... | --add_link MODULE ... ]\n"
547 --add_link -> Add the MODULE and man page references to the data base
548 --regen -> Regenerate the data file for $0
549 --cpan -> Include files in the cpan subdirectory.
550 --deltas -> Include stable perldeltas
551 --show_all -> Show all known potential problems
552 --counts -> Don't test, but give summary counts of the currently
560 my $cpan_or_deltas = $do_upstream_cpan || $do_deltas;
561 if (($regen + $show_all + $show_counts + $add_link + $cpan_or_deltas ) > 1) {
562 croak "--regen, --show_all, --counts, and --add_link are mutually exclusive\n and none can be run with --cpan nor --deltas";
565 my $has_input_files = @files;
568 && ($regen || $show_counts || $do_upstream_cpan || $do_deltas))
570 croak "--regen, --counts, --deltas, and --cpan can't be used since using specific files";
573 if ($add_link && ! $has_input_files) {
574 croak "--add_link requires at least one module or man page reference";
577 our %problems; # potential problems found in this run
579 package My::Pod::Checker { # Extend Pod::Checker
580 use parent 'Pod::Checker';
582 # Uses inside out hash to protect from typos
583 # For new fields, remember to add to destructor DESTROY()
584 my %indents; # Stack of indents from =over's in effect for
586 my %current_indent; # Current line's indent
587 my %filename; # The pod is store in this file
588 my %skip; # is SKIP set for this pod
589 my %in_NAME; # true if within NAME section
590 my %in_begin; # true if within =begin section
591 my %linkable_item; # Bool: if the latest =item is linkable. It isn't
592 # for bullet and number lists
593 my %linkable_nodes; # Pod::Checker adds all =items to its node list,
594 # but not all =items are linkable to
595 my %seen_encoding_cmd; # true if have =encoding earlier
596 my %command_count; # Number of commands seen
597 my %seen_pod_cmd; # true if have =pod earlier
598 my %warned_encoding; # true if already have warned about =encoding
602 my $addr = Scalar::Util::refaddr $_[0];
603 delete $command_count{$addr};
604 delete $current_indent{$addr};
605 delete $filename{$addr};
606 delete $in_begin{$addr};
607 delete $indents{$addr};
608 delete $in_NAME{$addr};
609 delete $linkable_item{$addr};
610 delete $linkable_nodes{$addr};
611 delete $seen_encoding_cmd{$addr};
612 delete $seen_pod_cmd{$addr};
614 delete $warned_encoding{$addr};
620 my $filename = shift;
622 my $self = $class->SUPER::new(-quiet => 1,
623 -warnings => $Warnings_Level);
624 my $addr = Scalar::Util::refaddr $self;
625 $command_count{$addr} = 0;
626 $current_indent{$addr} = 0;
627 $filename{$addr} = $filename;
628 $in_begin{$addr} = 0;
630 $linkable_item{$addr} = 0;
631 $seen_encoding_cmd{$addr} = 0;
632 $seen_pod_cmd{$addr} = 0;
633 $warned_encoding{$addr} = 0;
637 # re's for messages that Pod::Checker outputs
638 my $location = qr/ \b (?:in|at|on|near) \s+ /xi;
639 my $optional_location = qr/ (?: $location )? /xi;
640 my $line_reference = qr/ [('"]? $optional_location \b line \s+
641 (?: \d+ | EOF | \Q???\E | - )
644 sub poderror { # Called to register a potential problem
646 # This adds an extra field to the parent hash, 'parameter'. It is
647 # used to extract the variable parts of a message leaving just the
648 # constant skeleton. This in turn allows the message to be
649 # categorized better, so that it shows up as a single type in our
650 # database, with the specifics of each occurrence not being stored with
656 my $addr = Scalar::Util::refaddr $self;
657 return if $skip{$addr};
659 # Input can be a string or hash. If a string, parse it to separate
660 # out the line number and convert to a hash for easier further
663 if (ref $opts ne 'HASH') {
664 $message = join "", $opts, @_;
666 if ($message =~ s/\s*($line_reference)//) {
667 ($line_number = $1) =~ s/\s*$optional_location//;
670 $line_number = '???';
672 $opts = { -msg => $message, -line => $line_number };
674 $message = $opts->{'-msg'};
678 $message =~ s/^\d+\s+//;
679 return if main::suppressed($message);
681 $self->SUPER::poderror($opts, @_);
683 $opts->{parameter} = "" unless $opts->{parameter};
685 # The variable parts of the message tend to be enclosed in '...',
686 # "....", or (...). Extract them and put them in an extra field,
687 # 'parameter'. This is trickier because the matching delimiter to a
688 # '(' is its mirror, and not itself. Text::Balanced could be used
690 while ($message =~ m/ \s* $optional_location ( [('"] )/xg) {
693 $delimiter = ')' if $delimiter eq '(';
695 # If there is no ending delimiter, don't consider it to be a
696 # variable part. Most likely it is a contraction like "Don't"
697 last unless $message =~ m/\G .+? \Q$delimiter/xg;
699 my $length = $+[0] - $start;
701 # Get the part up through the closing delimiter
702 my $special = substr($message, $start, $length);
703 $special =~ s/^\s+//; # No leading whitespace
705 # And add that variable part to the parameter, while removing it
706 # from the message. This isn't a foolproof way of finding the
707 # variable part. For example '(s)' can occur in e.g.,
709 if ($special ne '(s)') {
710 substr($message, $start, $length) = "";
711 pos $message = $start;
712 $opts->{-msg} = $message;
713 $opts->{parameter} .= " " if $opts->{parameter};
714 $opts->{parameter} .= $special;
718 # Extract any additional line number given. This is often the
719 # beginning location of something whereas the main line number gives
721 if ($message =~ /( $line_reference )/xi) {
723 while ($message =~ s/\s*\Q$line_ref//) {
724 $opts->{-msg} = $message;
725 $opts->{parameter} .= " " if $opts->{parameter};
726 $opts->{parameter} .= $line_ref;
730 Carp::carp("Couldn't extract line number from '$message'") if $message =~ /line \d+/;
731 push @{$problems{$filename{$addr}}{$message}}, $opts;
732 #push @{$problems{$self->get_filename}{$message}}, $opts;
735 sub check_encoding { # Does it need an =encoding statement?
736 my ($self, $paragraph, $line_num, $pod_para) = @_;
738 # Do nothing if there is an =encoding in the file, or if the line
739 # doesn't require an =encoding, or have already warned.
740 my $addr = Scalar::Util::refaddr $self;
741 return if $seen_encoding_cmd{$addr}
742 || $warned_encoding{$addr}
743 || $paragraph !~ /\P{ASCII}/;
745 $warned_encoding{$addr} = 1;
746 my ($file, $line) = $pod_para->file_line;
747 $self->poderror({ -line => $line, -file => $file,
748 -msg => $need_encoding
754 my ($self, $paragraph, $line_num, $pod_para) = @_;
755 $self->check_encoding($paragraph, $line_num, $pod_para);
757 $self->SUPER::verbatim($paragraph, $line_num, $pod_para);
759 my $addr = Scalar::Util::refaddr $self;
761 # Pick up the name, since the parent class doesn't in verbatim
762 # NAMEs; so treat as non-verbatim. The parent class only allows one
763 # paragraph in a NAME section, so if there is an extra blank line, it
764 # will trigger a message, but such a blank line is harmless, so skip
766 if ($in_NAME{$addr} && $paragraph =~ /\S/) {
767 $self->textblock($paragraph, $line_num, $pod_para);
770 my @lines = split /^/, $paragraph;
771 for my $i (0 .. @lines - 1) {
772 if ( my $encoding = $seen_encoding_cmd{$addr} ) {
774 $lines[$i] = Encode::decode($encoding, $lines[$i]);
776 $lines[$i] =~ s/\s+$//;
777 my $indent = $self->get_current_indent;
778 my $exceeds = length(Text::Tabs::expand($lines[$i]))
779 + $indent - $MAX_LINE_LENGTH;
780 next unless $exceeds > 0;
781 my ($file, $line) = $pod_para->file_line;
782 $self->poderror({ -line => $line + $i, -file => $file,
783 -msg => $line_length,
784 parameter => "+$exceeds (including " . ($indent - $INDENT) . " from =over's)",
790 my ($self, $paragraph, $line_num, $pod_para) = @_;
791 $self->check_encoding($paragraph, $line_num, $pod_para);
793 $self->SUPER::textblock($paragraph, $line_num, $pod_para);
795 my ($file, $line) = $pod_para->file_line;
796 my $addr = Scalar::Util::refaddr $self;
797 if ($in_NAME{$addr}) {
799 my $text = $self->interpolate($paragraph, $line_num);
800 if ($text =~ /^\s*(\S+?)\s*$/) {
802 $self->poderror({ -line => $line, -file => $file,
803 -msg => $missing_name_description,
808 $paragraph = join " ", split /^/, $paragraph;
810 # Matches something that looks like a file name, but is enclosed in
812 my $C_path_re = qr{ \b ( C<
813 # exclude various things that have slashes
814 # in them but aren't paths
816 (?: (?: s | qr | m) / ) # regexes
817 | \d+/\d+> # probable fractions
822 | - # File names don't begin with "-"
824 [-\w]+ (?: / [-\w]+ )+ (?: \. \w+ )? > )
827 # If looks like a reference to other documentation by containing the
828 # word 'See' and then a likely pod directive, warn.
829 while ($paragraph =~ m{
830 ( (?: \w+ \s+ )* ) # The phrase before, if any
834 ( [^<]*? ) # The not < excludes nested C<L<...
837 ( \s+ (?: under | in ) \s+ L< )?
839 my $prefix = $1 // "";
840 my $construct = $2; # The whole thing, like C<...>
843 my $trailing = $5; # After the whole thing ending in "L<"
845 # If the full phrase is something like, "you might see C<", or
846 # similar, it really isn't a reference to a link. The ones I saw
847 # all had the word "you" in them; and the "you" wasn't the
848 # beginning of a sentence.
849 if ($prefix !~ / \b you \b /x) {
851 # Now, find what the module or man page name within the
852 # construct would be if it actually has L<> syntax. If it
853 # doesn't have that syntax, will set the module to the entire
856 (?: [^|]+ \| )? # Optional arbitrary text ending
858 ( .+? ) # module, etc. name
859 (?: \/ .+ )? # target within module
863 if (! defined $trailing # not referring to something in another
865 && $interior !~ /$non_pods/
867 # C<> that look like files have their own message below, so
869 && $construct !~ /$C_path_re/g
871 # There can't be spaces (I think) in module names or man
873 && $module !~ / \s /x
875 # F<> that end in eg \.pl are almost certainly ok, as are
876 # those that look like a path with multiple "/" chars
879 && $interior !~ /\.\w+$/
880 && $interior !~ /\/.+\//)
883 $self->poderror({ -line => $line, -file => $file,
884 -msg => $see_not_linked,
885 parameter => $construct
890 while ($paragraph =~ m/$C_path_re/g) {
892 $self->poderror({ -line => $line, -file => $file,
893 -msg => $C_with_slash,
894 parameter => $construct
901 my ($self, $cmd, $paragraph, $line_num, $pod_para) = @_;
902 my $addr = Scalar::Util::refaddr $self;
904 $seen_pod_cmd{$addr}++;
906 elsif ($cmd eq "encoding") {
907 my ($file, $line) = $pod_para->file_line;
908 $seen_encoding_cmd{$addr} = $paragraph; # for later decoding
909 if ($command_count{$addr} != 1 && $seen_pod_cmd{$addr}) {
910 $self->poderror({ -line => $line, -file => $file,
911 -msg => $encoding_first
915 $self->check_encoding($paragraph, $line_num, $pod_para);
917 # Pod::Check treats all =items as linkable, but the bullet and
918 # numbered lists really aren't. So keep our own list. This has to be
919 # processed before SUPER is called so that the list is started before
920 # the rest of it gets parsed.
921 if ($cmd eq 'item') { # Not linkable if item begins with * or a digit
922 $linkable_item{$addr} = ($paragraph !~ / ^ \s*
924 | \d+ \.? (?: \$ | \s+ )
930 $self->SUPER::command($cmd, $paragraph, $line_num, $pod_para);
932 $command_count{$addr}++;
934 $in_NAME{$addr} = 0; # Will change to 1 below if necessary
935 $in_begin{$addr} = 0; # ibid
936 if ($cmd eq 'over') {
937 my $text = $self->interpolate($paragraph, $line_num);
938 my $indent = 4; # default
939 $indent = $1 if $text && $text =~ /^\s*(\d+)\s*$/;
940 push @{$indents{$addr}}, $indent;
941 $current_indent{$addr} += $indent;
943 elsif ($cmd eq 'back') {
944 if (@{$indents{$addr}}) {
945 $current_indent{$addr} -= pop @{$indents{$addr}};
948 # =back without corresponding =over, but should have
950 $current_indent{$addr} = 0;
953 elsif ($cmd =~ /^head/) {
954 if (! $in_begin{$addr}) {
956 # If a particular formatter, then this command doesn't really
958 $current_indent{$addr} = 0;
959 undef @{$indents{$addr}};
962 my $text = $self->interpolate($paragraph, $line_num);
963 $in_NAME{$addr} = 1 if $cmd eq 'head1'
964 && $text && $text =~ /^NAME\b/;
966 elsif ($cmd eq 'begin') {
967 $in_begin{$addr} = 1;
977 if ($_[0] && ($page = $_[0][1]{'-page'})) {
978 my $node = $_[0][1]{'-node'};
980 # If the hyperlink is to an interior node of another page, save it
981 # so that we can see if we need to parse normally skipped files.
982 $has_referred_to_node{$page} = 1 if $node;
984 # Ignore certain placeholder links in perldelta. Check if the
985 # link is page-level, and also check if to a node within the page
986 if ($self->name && $self->name eq "perldelta"
987 && ((grep { $page eq $_ } @perldelta_ignore_links)
989 && (grep { "$page/$node" eq $_ } @perldelta_ignore_links)
994 return $self->SUPER::hyperlink($_[0]);
1001 $text =~ s/\s+$//s; # strip trailing whitespace
1002 $text =~ s/\s+/ /gs; # collapse whitespace
1003 my $addr = Scalar::Util::refaddr $self;
1004 push(@{$linkable_nodes{$addr}}, $text) if
1005 ! $current_indent{$addr}
1006 || $linkable_item{$addr};
1008 return $self->SUPER::node($_[0]);
1011 sub get_current_indent {
1012 return $INDENT + $current_indent{Scalar::Util::refaddr $_[0]};
1016 return $filename{Scalar::Util::refaddr $_[0]};
1019 sub linkable_nodes {
1020 my $linkables = $linkable_nodes{Scalar::Util::refaddr $_[0]};
1021 return undef unless $linkables;
1026 return $skip{Scalar::Util::refaddr $_[0]} // 0;
1031 $skip{Scalar::Util::refaddr $self} = shift;
1033 # If skipping, no need to keep the problems for it
1034 delete $problems{$self->get_filename};
1039 package Tie_Array_to_FH { # So printing actually goes to an array
1045 my $array_ref = shift;
1047 my $self = bless \do{ my $anonymous_scalar }, $class;
1048 $array{Scalar::Util::refaddr $self} = $array_ref;
1055 push @{$array{Scalar::Util::refaddr $self}}, @_;
1061 my %filename_to_checker; # Map a filename to it's pod checker object
1062 my %id_to_checker; # Map a checksum to it's pod checker object
1063 my %nodes; # key is filename, values are nodes in that file.
1064 my %nodes_first_word; # same, but value is first word of each node
1065 my %valid_modules; # List of modules known to exist outside us.
1066 my %digests; # checksums of files, whose names are the keys
1067 my %filename_to_pod; # Map a filename to its pod NAME
1068 my %files_with_unknown_issues;
1069 my %files_with_fixes;
1072 open $data_fh, '<:bytes', $known_issues or die "Can't open $known_issues";
1074 my %counts; # For --counts param, count of each issue type
1075 my %suppressed_files; # Files with at least one issue type to suppress
1077 # This file is the data file for $0.
1078 # There are three types of lines.
1079 # Comment lines are white-space only or begin with a '#', like this one. Any
1080 # changes you make to the comment lines will be lost when the file is
1082 # Lines without tab characters are simply NAMES of pods that the program knows
1083 # will have links to them and the program does not check if those links are
1085 # All other lines should have three fields, each separated by a tab. The
1086 # first field is the name of a pod; the second field is an error message
1087 # generated by this program; and the third field is a count of how many
1088 # known instances of that message there are in the pod. -1 means that the
1089 # program can expect any number of this type of message.
1092 my @existing_issues;
1095 while (<$data_fh>) { # Read the data base
1097 next if /^\s*(?:#|$)/; # Skip comment and empty lines
1100 if ($add_link) { # The issues are saved and later output unchanged
1101 push @existing_issues, $_;
1105 # Keep track of counts of each issue type for each file
1106 my ($filename, $message, $count) = split /\t/;
1107 $known_problems{$filename}{$message} = $count;
1110 if ($count < 0) { # -1 means to suppress this issue type
1111 $suppressed_files{$filename} = $filename;
1114 $counts{$message} += $count;
1118 else { # Lines without a tab are modules known to be valid
1119 $valid_modules{$_} = 1
1125 $copy_fh = open_new($known_issues);
1127 # Check for basic sanity, and add each command line argument
1128 foreach my $module (@files) {
1129 die "\"$module\" does not look like a module or man page"
1130 # Must look like (A or A::B or A::B::C ..., or foo(3C)
1131 if $module !~ /^ (?: \w+ (?: :: \w+ )* | \w+ \( \d \w* \) ) $/x;
1132 $valid_modules{$module} = 1
1134 my_safer_print($copy_fh, $HEADER);
1135 foreach (sort { lc $a cmp lc $b } keys %valid_modules) {
1136 my_safer_print($copy_fh, $_, "\n");
1139 # The rest of the db file is output unchanged.
1140 my_safer_print($copy_fh, join "\n", @existing_issues, "");
1142 close_and_rename($copy_fh);
1148 foreach my $message (sort keys %counts) {
1149 $total += $counts{$message};
1150 note(Text::Tabs::expand("$counts{$message}\t$message"));
1152 note("-----\n" . Text::Tabs::expand("$total\tknown potential issues"));
1153 if (%suppressed_files) {
1154 note("\nFiles that have all messages of at least one type suppressed:");
1155 note(join ",", keys %suppressed_files);
1160 # re to match files that are to be parsed only if there is an internal link
1161 # to them. It does not include cpan, as whether those are parsed depends
1162 # on a switch. Currently, only perltoc and the stable perldelta.pod's
1163 # are included. The latter all have characters between 'perl' and
1164 # 'delta'. (Actually the currently developed one matches as well, but
1165 # is a duplicate of perldelta.pod, so can be skipped, so fine for it to
1167 my $only_for_interior_links_re = qr/ ^ pod\/perltoc.pod $
1169 unless ($do_deltas) {
1170 $only_for_interior_links_re = qr/$only_for_interior_links_re |
1171 \b perl \d+ delta \. pod \b
1178 sub output_thanks ($$$$) { # Called when an issue has been fixed
1179 my $filename = shift;
1180 my $original_count = shift;
1181 my $current_count = shift;
1182 my $message = shift;
1184 $files_with_fixes{$filename} = 1;
1186 my $fixed_count = $original_count - $current_count;
1187 my $a_problem = ($fixed_count == 1) ? "a problem" : "multiple problems";
1188 my $another_problem = ($fixed_count == 1) ? "another problem" : "another set of problems";
1192 There were $original_count occurrences (now $current_count) in this pod of type
1197 There are no longer any problems found in this pod!
1204 Thanks for fixing $a_problem!
1206 Now you must teach $0 that this was fixed.
1211 Thanks for fixing $another_problem.
1220 sub my_safer_print { # print, with error checking for outputting to db
1221 my ($fh, @lines) = @_;
1223 if (! print $fh @lines) {
1224 my $save_error = $!;
1226 die "Write failure: $save_error";
1230 sub extract_pod { # Extracts just the pod from a file
1231 my $filename = shift;
1235 # Arrange for the output of Pod::Parser to be collected in an array we can
1236 # look at instead of being printed
1237 tie *ALREADY_FH, 'Tie_Array_to_FH', \@pod;
1238 open my $in_fh, '<:bytes', $filename
1240 # The file should already have been opened once to get here, so if
1241 # fails, just die. It's possible that a transitory file containing a
1242 # pod would get here, but not bothering to add code for that very
1244 or die "Can't open '$filename': $!\n";
1246 my $parser = Pod::Parser->new();
1247 $parser->parse_from_filehandle($in_fh, *ALREADY_FH);
1250 return join "", @pod
1253 my $digest = Digest->new($digest_type);
1256 # If $_ is a pod file, add it to the lists and do other prep work.
1259 # Don't look at files in directories that are for tests, nor those
1260 # beginning with a dot
1261 if ($_ eq 't' || $_ =~ /^\../) {
1262 $File::Find::prune = 1;
1267 return unless -r && -s; # Can't check it if can't read it; no need to
1269 return unless -f || -l; # Weird file types won't be pods
1271 if ($_ =~ /^\./ # No hidden Unix files
1272 || $_ =~ $non_pods) {
1273 note("Not considering $_") if DEBUG;
1277 my $filename = $File::Find::name;
1279 # $filename is relative, like './path'. Strip that initial part away.
1280 # Assumes that the path separator is exactly one character.
1281 $filename =~ s/^\..//;
1283 return if $excluded_files{canonicalize($filename)};
1288 if (! open $candidate, '<:bytes', $_) {
1290 # If a transitory file was found earlier, the open could fail
1291 # legitimately and we just skip the file; also skip it if it is a
1292 # broken symbolic link, as it is probably just a build problem;
1293 # certainly not a file that we would want to check the pod of.
1294 # Otherwise fail it here and no reason to process it further.
1295 # (But the test count will be off too)
1296 ok(0, "Can't open '$filename': $!")
1297 if -r $filename && ! -l $filename;
1303 # If the file is a .pm or .pod, having any initial '=' on a line is
1304 # grounds for testing it. Otherwise, require a head1 NAME line to
1305 # consider it as a potential pod
1306 if ($filename =~ /\.(?:pm|pod)/) {
1307 return unless $contents =~ /^=/m;
1309 return unless $contents =~ /^=head1 +NAME/m;
1312 # Here, we know that the file is a pod. Add it to the list of files
1313 # to check and create a checker object for it.
1315 push @files, $filename;
1316 my $checker = My::Pod::Checker->new($filename);
1317 $filename_to_checker{$filename} = $checker;
1319 # In order to detect duplicate pods and only analyze them once, we
1320 # compute checksums for the file, so don't have to do an exact
1321 # compare. Note that if the pod is just part of the file, the
1322 # checksums can differ for the same pod. That special case is handled
1323 # later, since if the checksums of the whole file are the same, that
1324 # case won't even come up. We don't need the checksums for files that
1325 # we parse only if there is a link to its interior, but we do need its
1326 # NAME, which is also retrieved in the code below.
1328 if ($filename =~ / (?: ^(cpan|lib|ext|dist)\/ )
1329 | $only_for_interior_links_re
1331 $digest->add($contents);
1332 $digests{$filename} = $digest->digest;
1334 # lib files aren't analyzed if they are duplicates of files copied
1335 # there from some other directory. But to determine this, we need
1336 # to know their NAMEs. We might as well find the NAME now while
1337 # the file is open. Similarly, cpan files aren't analyzed unless
1338 # we're analyzing all of them, or this particular file is linked
1339 # to by a file we are analyzing, and thus we will want to verify
1340 # that the target exists in it. We need to know at least the NAME
1341 # to see if it's worth analyzing, or so we can determine if a lib
1342 # file is a copy of a cpan one.
1343 if ($filename =~ m{ (?: ^ (?: cpan | lib ) / )
1344 | $only_for_interior_links_re
1346 if ($contents =~ /^=head1 +NAME.*/mg) {
1347 # The NAME is the first non-spaces on the line up to a
1348 # comma, dash or end of line. Otherwise, it's invalid and
1349 # this pod doesn't have a legal name that we're smart
1350 # enough to find currently. But the parser will later
1351 # find it if it thinks there is a legal name, and set the
1353 if ($contents =~ /\G # continue from the line after =head1
1354 \s* # ignore any empty lines
1355 ^ \s* ( \S+?) \s* (?: [,-] | $ )/mx) {
1357 $checker->name($name);
1358 $id_to_checker{$name} = $checker
1359 if $filename =~ m{^cpan/};
1362 elsif ($filename =~ m{^cpan/}) {
1363 $id_to_checker{$digests{$filename}} = $checker;
1369 } # End of is_pod_file()
1371 # Start of real code that isn't processing the command line (except the
1372 # db is read in above, as is processing of the --add_link option).
1373 # Here, @files contains list of files on the command line. If have any of
1374 # these, unconditionally test them, and show all the errors, even the known
1375 # ones, and, since not testing other pods, don't do cross-pod link tests.
1376 # (Could add extra code to do cross-pod tests for the ones in the list.)
1378 if ($has_input_files) {
1379 undef %known_problems;
1380 $do_upstream_cpan = $do_deltas = 1; # In case one of the inputs is one
1383 else { # No input files -- go find all the possibilities.
1385 $copy_fh = open_new($known_issues);
1386 note("Regenerating $known_issues, please be patient...");
1387 print $copy_fh $HEADER;
1390 # Move to the directory above us, but have to adjust @INC to account for
1392 s{^\.\./lib$}{lib} for @INC;
1393 chdir File::Spec->updir;
1395 # And look in this directory and all its subdirectories
1396 find( \&is_pod_file, '.');
1398 # Add ourselves to the test
1399 push @files, "t/porting/podcheck.t";
1402 # Now we know how many tests there will be.
1403 plan (tests => scalar @files) if ! $regen;
1406 # Sort file names so we get consistent results, and to put cpan last,
1407 # preceeded by the ones that we don't generally parse. This is because both
1408 # these classes are generally parsed only if there is a link to the interior
1409 # of them, and we have to parse all others first to guarantee that they don't
1410 # have such a link. 'lib' files come just before these, as some of these are
1411 # duplicates of others. We already have figured this out when gathering the
1412 # data as a special case for all such files, but this, while unnecessary,
1413 # puts the derived file last in the output. 'readme' files come before those,
1414 # as those also could be duplicates of others, which are considered the
1415 # primary ones. These currently aren't figured out when gathering data, so
1417 @files = sort { if ($a =~ /^cpan/) {
1418 return 1 if $b !~ /^cpan/;
1419 return lc $a cmp lc $b;
1421 elsif ($b =~ /^cpan/) {
1424 elsif ($a =~ /$only_for_interior_links_re/) {
1425 return 1 if $b !~ /$only_for_interior_links_re/;
1426 return lc $a cmp lc $b;
1428 elsif ($b =~ /$only_for_interior_links_re/) {
1431 elsif ($a =~ /^lib/) {
1432 return 1 if $b !~ /^lib/;
1433 return lc $a cmp lc $b;
1435 elsif ($b =~ /^lib/) {
1437 } elsif ($a =~ /\breadme\b/i) {
1438 return 1 if $b !~ /\breadme\b/i;
1439 return lc $a cmp lc $b;
1441 elsif ($b =~ /\breadme\b/i) {
1445 return lc $a cmp lc $b;
1450 # Now go through all the files and parse them
1451 foreach my $filename (@files) {
1453 note("parsing $filename") if DEBUG;
1455 # We may have already figured out some things in the process of generating
1456 # the file list. If so, we have a $checker object already. But if not,
1458 my $checker = $filename_to_checker{$filename};
1460 $checker = My::Pod::Checker->new($filename);
1461 $filename_to_checker{$filename} = $checker;
1464 # We have set the name in the checker object if there is a possibility
1465 # that no further parsing is necessary, but otherwise do the parsing now.
1466 if (! $checker->name) {
1468 $checker->parse_from_file($filename, undef);
1471 if ($checker->num_errors() < 0) { # Returns negative if not a pod
1472 $checker->set_skip("$filename is not a pod");
1476 # Here, is a pod. See if it is one that has already been tested,
1477 # or should be tested under another directory. Use either its NAME
1478 # if it has one, or a checksum if not.
1479 my $name = $checker->name;
1486 my $digest = Digest->new($digest_type);
1487 $digest->add(extract_pod($filename));
1488 $id = $digest->digest;
1491 # If there is a match for this pod with something that we've already
1492 # processed, don't process it, and output why.
1494 if (defined ($prior_checker = $id_to_checker{$id})
1495 && $prior_checker != $checker) # Could have defined the checker
1496 # earlier without pursuing it
1499 # If the pods are identical, then it's just a copy, and isn't an
1500 # error. First use the checksums we have already computed to see
1501 # if the entire files are identical, which means that the pods are
1503 my $prior_filename = $prior_checker->get_filename;
1505 || ($digests{$prior_filename}
1506 && $digests{$filename}
1507 && $digests{$prior_filename} eq $digests{$filename}));
1509 # If they differ, it could be that the files differ for some
1510 # reason, but the pods they contain are identical. Extract the
1511 # pods and do the comparisons on just those.
1512 if (! $same && $name) {
1513 $same = extract_pod($prior_filename) eq extract_pod($filename);
1517 $checker->set_skip("The pod of $filename is a duplicate of "
1518 . "the pod for $prior_filename");
1519 } elsif ($prior_filename =~ /\breadme\b/i) {
1520 $checker->set_skip("$prior_filename is a README apparently for $filename");
1521 } elsif ($filename =~ /\breadme\b/i) {
1522 $checker->set_skip("$filename is a README apparently for $prior_filename");
1523 } elsif (! $do_upstream_cpan
1524 && $filename =~ /^cpan/
1525 && $prior_filename =~ /^cpan/)
1527 $checker->set_skip("CPAN is upstream for $filename");
1528 } else { # Here have two pods with identical names that differ
1529 $prior_checker->poderror(
1530 { -msg => $duplicate_name,
1532 parameter => "'$filename' also has NAME '$name'"
1535 { -msg => $duplicate_name,
1537 parameter => "'$prior_filename' also has NAME '$name'"
1540 # Changing the names helps later.
1541 $prior_checker->name("$name version arbitrarily numbered 1");
1542 $checker->name("$name version arbitrarily numbered 2");
1545 # In any event, don't process this pod that has the same name as
1551 $id_to_checker{$id} = $checker;
1553 my $parsed_for_links = ", but parsed for its interior links";
1554 if ((! $do_upstream_cpan && $filename =~ /^cpan/)
1555 || $filename =~ $only_for_interior_links_re)
1557 if ($filename =~ /^cpan/) {
1558 $checker->set_skip("CPAN is upstream for $filename");
1560 elsif ($filename =~ /perl\d+delta/ && ! $do_deltas) {
1561 $checker->set_skip("$filename is a stable perldelta");
1563 elsif ($filename =~ /perltoc/) {
1564 $checker->set_skip("$filename dependent on component pods");
1567 croak("Unexpected file '$filename' encountered that has parsing for interior-linking only");
1570 if ($name && $has_referred_to_node{$name}) {
1571 $checker->set_skip($checker->get_skip() . $parsed_for_links);
1575 # Need a name in order to process it, because not meaningful
1576 # otherwise, and also can't test links to this without a name.
1577 if (!defined $name) {
1578 $checker->poderror( { -msg => $no_name,
1584 # For skipped files, just get its NAME
1586 if (($skip = $checker->get_skip()) && $skip !~ /$parsed_for_links/)
1588 $checker->node($name) if $name;
1591 $checker->parse_from_file($filename, undef) if ! $parsed;
1594 # Go through everything in the file that could be an anchor that
1595 # could be a link target. Count how many there are of the same name.
1596 foreach my $node ($checker->linkable_nodes) {
1597 next if ! $node; # Can be empty is like '=item *'
1598 if (exists $nodes{$name}{$node}) {
1599 $nodes{$name}{$node}++;
1602 $nodes{$name}{$node} = 1;
1605 # Experiments have shown that cpan search can figure out the
1606 # target of a link even if the exact wording is incorrect, as long
1607 # as the first word is. This happens frequently in perlfunc.pod,
1608 # where the link will be just to the function, but the target
1609 # entry also includes parameters to the function.
1610 my $first_word = $node;
1611 if ($first_word =~ s/^(\S+)\s+\S.*/$1/) {
1612 $nodes_first_word{$name}{$first_word} = $node;
1615 $filename_to_pod{$filename} = $name;
1619 # Here, all files have been parsed, and all links and link targets are stored.
1620 # Now go through the files again and see which don't have matches.
1621 if (! $has_input_files) {
1622 foreach my $filename (@files) {
1623 next if $filename_to_checker{$filename}->get_skip;
1624 my $checker = $filename_to_checker{$filename};
1625 foreach my $link ($checker->hyperlink) {
1626 my $linked_to_page = $link->[1]->page;
1627 next unless $linked_to_page; # intra-file checks are handled by std
1630 # Initialize the potential message.
1631 my %problem = ( -msg => $broken_link,
1632 -line => $link->[0],
1633 parameter => "to \"$linked_to_page\"",
1636 # See if we have found the linked-to_file in our parse
1637 if (exists $nodes{$linked_to_page}) {
1638 my $node = $link->[1]->node;
1640 # If link is only to the page-level, already have it
1643 # Transform pod language to what we are expecting
1644 $node =~ s,E<sol>,/,g;
1645 $node =~ s/E<verbar>/|/g;
1647 # If link is to a node that exists in the file, is ok
1648 if ($nodes{$linked_to_page}{$node}) {
1650 # But if the page has multiple targets with the same name,
1651 # it's ambiguous which one this should be to.
1652 if ($nodes{$linked_to_page}{$node} > 1) {
1653 $problem{-msg} = $multiple_targets;
1654 $problem{parameter} = "in $linked_to_page that $node could be pointing to";
1655 $checker->poderror(\%problem);
1657 } elsif (! $nodes_first_word{$linked_to_page}{$node}) {
1659 # Here the link target was not found, either exactly or to
1660 # the first word. Is an error.
1661 $problem{parameter} =~ s,"$,/$node",;
1662 $checker->poderror(\%problem);
1665 } # Linked-to-file not in parse; maybe is in exception list
1666 elsif (! exists $valid_modules{$link->[1]->page}) {
1668 # Here, is a link to a target that we can't find. Check if
1669 # there is an internal link on the page with the target name.
1670 # If so, it could be that they just forgot the initial '/'
1671 # But perldelta is handled specially: only do this if the
1672 # broken link isn't one of the known bad ones (that are
1673 # placemarkers and should be removed for the final)
1674 my $NAME = $filename_to_pod{$filename};
1675 if (! defined $NAME) {
1676 $checker->poderror(\%problem);
1679 if ($nodes{$NAME}{$linked_to_page}) {
1680 $problem{-msg} = $broken_internal_link;
1682 $checker->poderror(\%problem);
1689 # If regenerating the data file, start with the modules for which we don't
1690 # check targets. If you change the sort order, you need to run --regen before
1691 # committing so that future commits that do run regen don't show irrelevant
1694 foreach (sort { lc $a cmp lc $b } keys %valid_modules) {
1695 my_safer_print($copy_fh, $_, "\n");
1699 # Now ready to output the messages.
1700 foreach my $filename (@files) {
1701 my $canonical = canonicalize($filename);
1703 my $skip = $filename_to_checker{$filename}->get_skip // "";
1706 foreach my $message ( sort keys %{$problems{$filename}}) {
1709 # Preserve a negative setting.
1710 if ($known_problems{$canonical}{$message}
1711 && $known_problems{$canonical}{$message} < 0)
1713 $count = $known_problems{$canonical}{$message};
1716 $count = @{$problems{$filename}{$message}};
1718 my_safer_print($copy_fh, $canonical . "\t$message\t$count\n");
1723 skip($skip, 1) if $skip;
1727 my $total_known = 0;
1728 foreach my $message ( sort keys %{$problems{$filename}}) {
1729 $known_problems{$canonical}{$message} = 0
1730 if ! $known_problems{$canonical}{$message};
1731 my $diagnostic = "";
1732 my $problem_count = scalar @{$problems{$filename}{$message}};
1733 $total_known += $problem_count;
1734 next if $known_problems{$canonical}{$message} < 0;
1735 if ($problem_count > $known_problems{$canonical}{$message}) {
1737 # Here we are about to output all the messages for this type,
1738 # subtract back this number we previously added in.
1739 $total_known -= $problem_count;
1741 $diagnostic .= $indent . $message;
1742 if ($problem_count > 2) {
1743 $diagnostic .= " ($problem_count occurrences)";
1745 foreach my $problem (@{$problems{$filename}{$message}}) {
1746 $diagnostic .= " " if $problem_count == 1;
1747 $diagnostic .= "\n$indent$indent";
1748 $diagnostic .= "$problem->{parameter}" if $problem->{parameter};
1749 $diagnostic .= " near line $problem->{-line}";
1750 $diagnostic .= " $problem->{comment}" if $problem->{comment};
1752 $diagnostic .= "\n";
1753 $files_with_unknown_issues{$filename} = 1;
1754 } elsif ($problem_count < $known_problems{$canonical}{$message}) {
1755 $diagnostic = output_thanks($filename, $known_problems{$canonical}{$message}, $problem_count, $message);
1757 push @diagnostics, $diagnostic if $diagnostic;
1760 # The above loop has output messages where there are current potential
1761 # issues. But it misses where there were some that have been entirely
1762 # fixed. For those, we need to look through the old issues
1763 foreach my $message ( sort keys %{$known_problems{$canonical}}) {
1764 next if $problems{$filename}{$message};
1765 next if ! $known_problems{$canonical}{$message};
1766 next if $known_problems{$canonical}{$message} < 0; # Preserve negs
1767 my $diagnostic = output_thanks($filename, $known_problems{$canonical}{$message}, 0, $message);
1768 push @diagnostics, $diagnostic if $diagnostic;
1771 my $output = "POD of $filename";
1772 $output .= ", excluding $total_known not shown known potential problems"
1774 ok(@diagnostics == 0, $output);
1776 note(join "", @diagnostics,
1777 "See end of this test output for your options on silencing this");
1783 run this test script by hand, using the following formula (on
1784 Un*x-like machines):
1786 ./perl -I../lib porting/podcheck.t --regen
1789 if (%files_with_unknown_issues) {
1790 my $were_count_files = scalar keys %files_with_unknown_issues;
1791 $were_count_files = ($were_count_files == 1)
1792 ? "was $were_count_files file"
1793 : "were $were_count_files files";
1794 my $message = <<EOF;
1796 HOW TO GET THIS .t TO PASS
1798 There $were_count_files that had new potential problems identified.
1799 Some of them may be real, and some of them may be false positives because
1800 this program isn't as smart as it likes to think it is. You can teach this
1801 program to ignore the issues it has identified, and hence pass, by doing the
1804 1) If a problem is about a link to an unknown module or man page that
1805 you know exists, re-run the command something like:
1806 ./perl -I../lib porting/podcheck.t --add_link MODULE man_page ...
1807 (MODULEs should look like Foo::Bar, and man_pages should look like
1808 bar(3c); don't do this for a module or man page that you aren't sure
1809 about; instead treat as another type of issue and follow the
1810 instructions below.)
1812 2) For other issues, decide if each should be fixed now or not. Fix the
1813 ones you decided to, and rerun this test to verify that the fixes
1816 3) If there remain false positive or problems that you don't plan to fix right
1819 That should cause all current potential problems to be accepted by
1820 the program, so that the next time it runs, they won't be flagged.
1822 if (%files_with_fixes) {
1823 $message .= " This step will also take care of the files that have fixes in them\n";
1827 For a few files, such as perltoc, certain issues will always be
1828 expected, and more of the same will be added over time. For those,
1829 before you do the regen, you can edit
1831 and find the entry for the module's file and specific error message,
1832 and change the count of known potential problems to -1.
1836 } elsif (%files_with_fixes) {
1838 To teach this test script that the potential problems have been fixed,
1845 chdir $original_dir || die "Can't change directories to $original_dir";
1846 close_and_rename($copy_fh);