Commit | Line | Data |
e2c3adef |
1 | ############################################################################# |
2 | # Pod/Find.pm -- finds files containing POD documentation |
3 | # |
4 | # Author: Marek Rouchal <marek@saftsack.fs.uni-bayreuth.de> |
5 | # |
66aff6dd |
6 | # Copyright (C) 1999-2000 by Marek Rouchal (and borrowing code |
7 | # from Nick Ing-Simmon's PodToHtml). All rights reserved. |
e2c3adef |
8 | # This file is part of "PodParser". Pod::Find is free software; |
9 | # you can redistribute it and/or modify it under the same terms |
10 | # as Perl itself. |
11 | ############################################################################# |
12 | |
13 | package Pod::Find; |
14 | |
15 | use vars qw($VERSION); |
88d01e8d |
16 | $VERSION = 0.22; ## Current version of this package |
92e3d63a |
17 | require 5.005; ## requires this Perl version or later |
18 | use Carp; |
e2c3adef |
19 | |
20 | ############################################################################# |
21 | |
22 | =head1 NAME |
23 | |
24 | Pod::Find - find POD documents in directory trees |
25 | |
26 | =head1 SYNOPSIS |
27 | |
28 | use Pod::Find qw(pod_find simplify_name); |
29 | my %pods = pod_find({ -verbose => 1, -inc => 1 }); |
30 | foreach(keys %pods) { |
31 | print "found library POD `$pods{$_}' in $_\n"; |
32 | } |
33 | |
34 | print "podname=",simplify_name('a/b/c/mymodule.pod'),"\n"; |
35 | |
92e3d63a |
36 | $location = pod_where( { -inc => 1 }, "Pod::Find" ); |
37 | |
e2c3adef |
38 | =head1 DESCRIPTION |
39 | |
92e3d63a |
40 | B<Pod::Find> provides a set of functions to locate POD files. Note that |
41 | no function is exported by default to avoid pollution of your namespace, |
42 | so be sure to specify them in the B<use> statement if you need them: |
43 | |
44 | use Pod::Find qw(pod_find); |
45 | |
46 | =cut |
47 | |
48 | use strict; |
49 | #use diagnostics; |
50 | use Exporter; |
51 | use File::Spec; |
52 | use File::Find; |
53 | use Cwd; |
54 | |
55 | use vars qw(@ISA @EXPORT_OK $VERSION); |
56 | @ISA = qw(Exporter); |
57 | @EXPORT_OK = qw(&pod_find &simplify_name &pod_where &contains_pod); |
58 | |
59 | # package global variables |
60 | my $SIMPLIFY_RX; |
61 | |
62 | =head2 C<pod_find( { %opts } , @directories )> |
63 | |
64 | The function B<pod_find> searches for POD documents in a given set of |
65 | files and/or directories. It returns a hash with the file names as keys |
66 | and the POD name as value. The POD name is derived from the file name |
67 | and its position in the directory tree. |
e2c3adef |
68 | |
69 | E.g. when searching in F<$HOME/perl5lib>, the file |
70 | F<$HOME/perl5lib/MyModule.pm> would get the POD name I<MyModule>, |
71 | whereas F<$HOME/perl5lib/Myclass/Subclass.pm> would be |
72 | I<Myclass::Subclass>. The name information can be used for POD |
73 | translators. |
74 | |
75 | Only text files containing at least one valid POD command are found. |
76 | |
77 | A warning is printed if more than one POD file with the same POD name |
78 | is found, e.g. F<CPAN.pm> in different directories. This usually |
2773b013 |
79 | indicates duplicate occurrences of modules in the I<@INC> search path. |
e2c3adef |
80 | |
92e3d63a |
81 | B<OPTIONS> The first argument for B<pod_find> may be a hash reference |
82 | with options. The rest are either directories that are searched |
83 | recursively or files. The POD names of files are the plain basenames |
84 | with any Perl-like extension (.pm, .pl, .pod) stripped. |
e2c3adef |
85 | |
86 | =over 4 |
87 | |
92e3d63a |
88 | =item C<-verbose =E<gt> 1> |
e2c3adef |
89 | |
90 | Print progress information while scanning. |
91 | |
92e3d63a |
92 | =item C<-perl =E<gt> 1> |
e2c3adef |
93 | |
94 | Apply Perl-specific heuristics to find the correct PODs. This includes |
95 | stripping Perl-like extensions, omitting subdirectories that are numeric |
96 | but do I<not> match the current Perl interpreter's version id, suppressing |
97 | F<site_perl> as a module hierarchy name etc. |
98 | |
92e3d63a |
99 | =item C<-script =E<gt> 1> |
e2c3adef |
100 | |
101 | Search for PODs in the current Perl interpreter's installation |
102 | B<scriptdir>. This is taken from the local L<Config|Config> module. |
103 | |
92e3d63a |
104 | =item C<-inc =E<gt> 1> |
e2c3adef |
105 | |
2773b013 |
106 | Search for PODs in the current Perl interpreter's I<@INC> paths. This |
92e3d63a |
107 | automatically considers paths specified in the C<PERL5LIB> environment |
108 | as this is prepended to I<@INC> by the Perl interpreter itself. |
e2c3adef |
109 | |
110 | =back |
111 | |
e2c3adef |
112 | =cut |
113 | |
66aff6dd |
114 | # return a hash of the POD files found |
115 | # first argument may be a hashref (options), |
116 | # rest is a list of directories to search recursively |
e2c3adef |
117 | sub pod_find |
118 | { |
119 | my %opts; |
120 | if(ref $_[0]) { |
121 | %opts = %{shift()}; |
122 | } |
123 | |
124 | $opts{-verbose} ||= 0; |
125 | $opts{-perl} ||= 0; |
126 | |
127 | my (@search) = @_; |
128 | |
129 | if($opts{-script}) { |
130 | require Config; |
dc459aad |
131 | push(@search, $Config::Config{scriptdir}) |
132 | if -d $Config::Config{scriptdir}; |
e2c3adef |
133 | $opts{-perl} = 1; |
134 | } |
135 | |
136 | if($opts{-inc}) { |
dc459aad |
137 | if ($^O eq 'MacOS') { |
138 | # tolerate '.', './some_dir' and '(../)+some_dir' on Mac OS |
139 | my @new_INC = @INC; |
140 | for (@new_INC) { |
141 | if ( $_ eq '.' ) { |
142 | $_ = ':'; |
143 | } elsif ( $_ =~ s|^((?:\.\./)+)|':' x (length($1)/3)|e ) { |
144 | $_ = ':'. $_; |
145 | } else { |
146 | $_ =~ s|^\./|:|; |
147 | } |
148 | } |
149 | push(@search, grep($_ ne File::Spec->curdir, @new_INC)); |
150 | } else { |
151 | push(@search, grep($_ ne File::Spec->curdir, @INC)); |
152 | } |
153 | |
e2c3adef |
154 | $opts{-perl} = 1; |
155 | } |
156 | |
157 | if($opts{-perl}) { |
158 | require Config; |
159 | # this code simplifies the POD name for Perl modules: |
160 | # * remove "site_perl" |
2773b013 |
161 | # * remove e.g. "i586-linux" (from 'archname') |
e2c3adef |
162 | # * remove e.g. 5.00503 |
163 | # * remove pod/ if followed by *.pod (e.g. in pod/perlfunc.pod) |
66aff6dd |
164 | |
dc459aad |
165 | # Mac OS: |
166 | # * remove ":?site_perl:" |
167 | # * remove :?pod: if followed by *.pod (e.g. in :pod:perlfunc.pod) |
168 | |
169 | if ($^O eq 'MacOS') { |
170 | $SIMPLIFY_RX = |
171 | qq!^(?i:\:?site_perl\:|\:?pod\:(?=.*?\\.pod\\z))*!; |
172 | } else { |
173 | $SIMPLIFY_RX = |
174 | qq!^(?i:site(_perl)?/|\Q$Config::Config{archname}\E/|\\d+\\.\\d+([_.]?\\d+)?/|pod/(?=.*?\\.pod\\z))*!; |
175 | } |
e2c3adef |
176 | } |
177 | |
178 | my %dirs_visited; |
179 | my %pods; |
180 | my %names; |
181 | my $pwd = cwd(); |
182 | |
183 | foreach my $try (@search) { |
2773b013 |
184 | unless(File::Spec->file_name_is_absolute($try)) { |
185 | # make path absolute |
186 | $try = File::Spec->catfile($pwd,$try); |
187 | } |
188 | # simplify path |
16be52b8 |
189 | # on VMS canonpath will vmsify:[the.path], but File::Find::find |
190 | # wants /unixy/paths |
191 | $try = File::Spec->canonpath($try) if ($^O ne 'VMS'); |
c4974618 |
192 | $try = VMS::Filespec::unixify($try) if ($^O eq 'VMS'); |
e2c3adef |
193 | my $name; |
194 | if(-f $try) { |
195 | if($name = _check_and_extract_name($try, $opts{-verbose})) { |
196 | _check_for_duplicates($try, $name, \%names, \%pods); |
197 | } |
198 | next; |
199 | } |
dc459aad |
200 | my $root_rx = $^O eq 'MacOS' ? qq!^\Q$try\E! : qq!^\Q$try\E/!; |
e2c3adef |
201 | File::Find::find( sub { |
2773b013 |
202 | my $item = $File::Find::name; |
203 | if(-d) { |
204 | if($dirs_visited{$item}) { |
205 | warn "Directory '$item' already seen, skipping.\n" |
206 | if($opts{-verbose}); |
207 | $File::Find::prune = 1; |
208 | return; |
209 | } |
210 | else { |
211 | $dirs_visited{$item} = 1; |
212 | } |
213 | if($opts{-perl} && /^(\d+\.[\d_]+)\z/s && eval "$1" != $]) { |
e2c3adef |
214 | $File::Find::prune = 1; |
215 | warn "Perl $] version mismatch on $_, skipping.\n" |
2773b013 |
216 | if($opts{-verbose}); |
217 | } |
218 | return; |
219 | } |
e2c3adef |
220 | if($name = _check_and_extract_name($item, $opts{-verbose}, $root_rx)) { |
221 | _check_for_duplicates($item, $name, \%names, \%pods); |
222 | } |
2773b013 |
223 | }, $try); # end of File::Find::find |
e2c3adef |
224 | } |
225 | chdir $pwd; |
226 | %pods; |
227 | } |
228 | |
229 | sub _check_for_duplicates { |
230 | my ($file, $name, $names_ref, $pods_ref) = @_; |
231 | if($$names_ref{$name}) { |
232 | warn "Duplicate POD found (shadowing?): $name ($file)\n"; |
2773b013 |
233 | warn " Already seen in ", |
234 | join(' ', grep($$pods_ref{$_} eq $name, keys %$pods_ref)),"\n"; |
e2c3adef |
235 | } |
236 | else { |
237 | $$names_ref{$name} = 1; |
238 | } |
239 | $$pods_ref{$file} = $name; |
240 | } |
241 | |
242 | sub _check_and_extract_name { |
243 | my ($file, $verbose, $root_rx) = @_; |
244 | |
2773b013 |
245 | # check extension or executable flag |
246 | # this involves testing the .bat extension on Win32! |
92e3d63a |
247 | unless(-f $file && -T _ && ($file =~ /\.(pod|pm|plx?)\z/i || -x _ )) { |
248 | return undef; |
e2c3adef |
249 | } |
250 | |
92e3d63a |
251 | return undef unless contains_pod($file,$verbose); |
e2c3adef |
252 | |
253 | # strip non-significant path components |
92e3d63a |
254 | # TODO what happens on e.g. Win32? |
e2c3adef |
255 | my $name = $file; |
256 | if(defined $root_rx) { |
fe6f1558 |
257 | $name =~ s!$root_rx!!s; |
258 | $name =~ s!$SIMPLIFY_RX!!os if(defined $SIMPLIFY_RX); |
e2c3adef |
259 | } |
260 | else { |
dc459aad |
261 | if ($^O eq 'MacOS') { |
262 | $name =~ s/^.*://s; |
263 | } else { |
264 | $name =~ s:^.*/::s; |
265 | } |
e2c3adef |
266 | } |
2773b013 |
267 | _simplify($name); |
268 | $name =~ s!/+!::!g; #/ |
dc459aad |
269 | if ($^O eq 'MacOS') { |
270 | $name =~ s!:+!::!g; # : -> :: |
271 | } else { |
272 | $name =~ s!/+!::!g; # / -> :: |
273 | } |
e2c3adef |
274 | $name; |
275 | } |
276 | |
92e3d63a |
277 | =head2 C<simplify_name( $str )> |
278 | |
279 | The function B<simplify_name> is equivalent to B<basename>, but also |
280 | strips Perl-like extensions (.pm, .pl, .pod) and extensions like |
2eec1a1e |
281 | F<.bat>, F<.cmd> on Win32 and OS/2, or F<.com> on VMS, respectively. |
92e3d63a |
282 | |
283 | =cut |
284 | |
e2c3adef |
285 | # basic simplification of the POD name: |
286 | # basename & strip extension |
287 | sub simplify_name { |
288 | my ($str) = @_; |
2773b013 |
289 | # remove all path components |
dc459aad |
290 | if ($^O eq 'MacOS') { |
291 | $str =~ s/^.*://s; |
292 | } else { |
293 | $str =~ s:^.*/::s; |
294 | } |
2773b013 |
295 | _simplify($str); |
e2c3adef |
296 | $str; |
297 | } |
298 | |
2773b013 |
299 | # internal sub only |
300 | sub _simplify { |
301 | # strip Perl's own extensions |
302 | $_[0] =~ s/\.(pod|pm|plx?)\z//i; |
303 | # strip meaningless extensions on Win32 and OS/2 |
dbd1b0a2 |
304 | $_[0] =~ s/\.(bat|exe|cmd)\z//i if($^O =~ /mswin|os2/i); |
2eec1a1e |
305 | # strip meaningless extensions on VMS |
306 | $_[0] =~ s/\.(com)\z//i if($^O eq 'VMS'); |
2773b013 |
307 | } |
308 | |
92e3d63a |
309 | # contribution from Tim Jenness <t.jenness@jach.hawaii.edu> |
310 | |
311 | =head2 C<pod_where( { %opts }, $pod )> |
312 | |
313 | Returns the location of a pod document given a search directory |
314 | and a module (e.g. C<File::Find>) or script (e.g. C<perldoc>) name. |
315 | |
316 | Options: |
317 | |
318 | =over 4 |
319 | |
320 | =item C<-inc =E<gt> 1> |
321 | |
322 | Search @INC for the pod and also the C<scriptdir> defined in the |
323 | L<Config|Config> module. |
324 | |
325 | =item C<-dirs =E<gt> [ $dir1, $dir2, ... ]> |
326 | |
327 | Reference to an array of search directories. These are searched in order |
328 | before looking in C<@INC> (if B<-inc>). Current directory is used if |
329 | none are specified. |
330 | |
331 | =item C<-verbose =E<gt> 1> |
332 | |
333 | List directories as they are searched |
334 | |
335 | =back |
336 | |
fb8eeed8 |
337 | Returns the full path of the first occurrence to the file. |
92e3d63a |
338 | Package names (eg 'A::B') are automatically converted to directory |
339 | names in the selected directory. (eg on unix 'A::B' is converted to |
340 | 'A/B'). Additionally, '.pm', '.pl' and '.pod' are appended to the |
341 | search automatically if required. |
342 | |
343 | A subdirectory F<pod/> is also checked if it exists in any of the given |
344 | search directories. This ensures that e.g. L<perlfunc|perlfunc> is |
345 | found. |
346 | |
347 | It is assumed that if a module name is supplied, that that name |
348 | matches the file name. Pods are not opened to check for the 'NAME' |
349 | entry. |
350 | |
351 | A check is made to make sure that the file that is found does |
352 | contain some pod documentation. |
353 | |
354 | =cut |
355 | |
356 | sub pod_where { |
357 | |
358 | # default options |
359 | my %options = ( |
360 | '-inc' => 0, |
361 | '-verbose' => 0, |
dc459aad |
362 | '-dirs' => [ File::Spec->curdir ], |
92e3d63a |
363 | ); |
364 | |
365 | # Check for an options hash as first argument |
366 | if (defined $_[0] && ref($_[0]) eq 'HASH') { |
367 | my $opt = shift; |
368 | |
369 | # Merge default options with supplied options |
370 | %options = (%options, %$opt); |
371 | } |
372 | |
373 | # Check usage |
374 | carp 'Usage: pod_where({options}, $pod)' unless (scalar(@_)); |
375 | |
376 | # Read argument |
377 | my $pod = shift; |
378 | |
379 | # Split on :: and then join the name together using File::Spec |
380 | my @parts = split (/::/, $pod); |
381 | |
382 | # Get full directory list |
383 | my @search_dirs = @{ $options{'-dirs'} }; |
384 | |
385 | if ($options{'-inc'}) { |
386 | |
387 | require Config; |
388 | |
389 | # Add @INC |
dc459aad |
390 | if ($^O eq 'MacOS' && $options{'-inc'}) { |
391 | # tolerate '.', './some_dir' and '(../)+some_dir' on Mac OS |
392 | my @new_INC = @INC; |
393 | for (@new_INC) { |
394 | if ( $_ eq '.' ) { |
395 | $_ = ':'; |
396 | } elsif ( $_ =~ s|^((?:\.\./)+)|':' x (length($1)/3)|e ) { |
397 | $_ = ':'. $_; |
398 | } else { |
399 | $_ =~ s|^\./|:|; |
400 | } |
401 | } |
402 | push (@search_dirs, @new_INC); |
403 | } elsif ($options{'-inc'}) { |
404 | push (@search_dirs, @INC); |
405 | } |
92e3d63a |
406 | |
407 | # Add location of pod documentation for perl man pages (eg perlfunc) |
408 | # This is a pod directory in the private install tree |
409 | #my $perlpoddir = File::Spec->catdir($Config::Config{'installprivlib'}, |
410 | # 'pod'); |
411 | #push (@search_dirs, $perlpoddir) |
412 | # if -d $perlpoddir; |
413 | |
414 | # Add location of binaries such as pod2text |
415 | push (@search_dirs, $Config::Config{'scriptdir'}) |
416 | if -d $Config::Config{'scriptdir'}; |
417 | } |
418 | |
419 | # Loop over directories |
420 | Dir: foreach my $dir ( @search_dirs ) { |
421 | |
dc459aad |
422 | # Don't bother if can't find the directory |
92e3d63a |
423 | if (-d $dir) { |
424 | warn "Looking in directory $dir\n" |
425 | if $options{'-verbose'}; |
426 | |
427 | # Now concatenate this directory with the pod we are searching for |
428 | my $fullname = File::Spec->catfile($dir, @parts); |
429 | warn "Filename is now $fullname\n" |
430 | if $options{'-verbose'}; |
431 | |
432 | # Loop over possible extensions |
433 | foreach my $ext ('', '.pod', '.pm', '.pl') { |
434 | my $fullext = $fullname . $ext; |
435 | if (-f $fullext && |
436 | contains_pod($fullext, $options{'-verbose'}) ) { |
437 | warn "FOUND: $fullext\n" if $options{'-verbose'}; |
438 | return $fullext; |
439 | } |
440 | } |
441 | } else { |
442 | warn "Directory $dir does not exist\n" |
443 | if $options{'-verbose'}; |
444 | next Dir; |
445 | } |
446 | if(-d File::Spec->catdir($dir,'pod')) { |
447 | $dir = File::Spec->catdir($dir,'pod'); |
448 | redo Dir; |
449 | } |
450 | } |
451 | # No match; |
452 | return undef; |
453 | } |
454 | |
455 | =head2 C<contains_pod( $file , $verbose )> |
456 | |
457 | Returns true if the supplied filename (not POD module) contains some pod |
458 | information. |
459 | |
460 | =cut |
461 | |
462 | sub contains_pod { |
463 | my $file = shift; |
464 | my $verbose = 0; |
465 | $verbose = shift if @_; |
466 | |
467 | # check for one line of POD |
468 | unless(open(POD,"<$file")) { |
469 | warn "Error: $file is unreadable: $!\n"; |
470 | return undef; |
471 | } |
472 | |
473 | local $/ = undef; |
474 | my $pod = <POD>; |
475 | close(POD) || die "Error closing $file: $!\n"; |
476 | unless($pod =~ /\n=(head\d|pod|over|item)\b/s) { |
477 | warn "No POD in $file, skipping.\n" |
478 | if($verbose); |
479 | return 0; |
480 | } |
481 | |
482 | return 1; |
483 | } |
484 | |
485 | =head1 AUTHOR |
486 | |
487 | Marek Rouchal E<lt>marek@saftsack.fs.uni-bayreuth.deE<gt>, |
488 | heavily borrowing code from Nick Ing-Simmons' PodToHtml. |
489 | |
490 | Tim Jenness E<lt>t.jenness@jach.hawaii.eduE<gt> provided |
491 | C<pod_where> and C<contains_pod>. |
492 | |
493 | =head1 SEE ALSO |
494 | |
495 | L<Pod::Parser>, L<Pod::Checker>, L<perldoc> |
496 | |
497 | =cut |
498 | |
e2c3adef |
499 | 1; |
500 | |