source: main/trunk/greenstone2/perllib/plugins/DirectoryPlugin.pm@ 21285

Last change on this file since 21285 was 21285, checked in by kjdon, 14 years ago

added empty removeold method

  • Property svn:executable set to *
  • Property svn:keywords set to Author Date Id Revision
File size: 20.5 KB
Line 
1###########################################################################
2#
3# DirectoryPlugin.pm --
4# A component of the Greenstone digital library software
5# from the New Zealand Digital Library Project at the
6# University of Waikato, New Zealand.
7#
8# Copyright (C) 1999 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26# DirectoryPlugin is a plugin which recurses through directories processing
27# each file it finds - which basically means passing it down the plugin
28# pipeline
29
30package DirectoryPlugin;
31
32use PrintInfo;
33use plugin;
34use util;
35use metadatautil;
36
37use File::Basename;
38use strict;
39no strict 'refs';
40no strict 'subs';
41
42use Encode;
43
44BEGIN {
45 @DirectoryPlugin::ISA = ('PrintInfo');
46}
47
48my $arguments =
49 [ { 'name' => "block_exp",
50 'desc' => "{BasePlugin.block_exp}",
51 'type' => "regexp",
52 'deft' => &get_default_block_exp(),
53 'reqd' => "no" },
54 # this option has been deprecated. leave it here for now so we can warn people not to use it
55 { 'name' => "use_metadata_files",
56 'desc' => "{DirectoryPlugin.use_metadata_files}",
57 'type' => "flag",
58 'reqd' => "no",
59 'hiddengli' => "yes" },
60 { 'name' => "recheck_directories",
61 'desc' => "{DirectoryPlugin.recheck_directories}",
62 'type' => "flag",
63 'reqd' => "no" } ];
64
65my $options = { 'name' => "DirectoryPlugin",
66 'desc' => "{DirectoryPlugin.desc}",
67 'abstract' => "no",
68 'inherits' => "yes",
69 'args' => $arguments };
70
71sub new {
72 my ($class) = shift (@_);
73 my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
74 push(@$pluginlist, $class);
75
76 push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
77 push(@{$hashArgOptLists->{"OptList"}},$options);
78
79 my $self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists);
80
81 if ($self->{'info_only'}) {
82 # don't worry about any options or initialisations etc
83 return bless $self, $class;
84 }
85
86 # we have left this option in so we can warn people who are still using it
87 if ($self->{'use_metadata_files'}) {
88 die "ERROR: DirectoryPlugin -use_metadata_files option has been deprecated. Please remove the option and add MetadataXMLPlug to your plugin list instead!\n";
89 }
90
91 $self->{'num_processed'} = 0;
92 $self->{'num_not_processed'} = 0;
93 $self->{'num_blocked'} = 0;
94 $self->{'num_archives'} = 0;
95
96 $self->{'subdir_extrametakeys'} = {};
97
98 return bless $self, $class;
99}
100
101# called once, at the start of processing
102sub init {
103 my $self = shift (@_);
104 my ($verbosity, $outhandle, $failhandle) = @_;
105
106 # verbosity is passed through from the processor
107 $self->{'verbosity'} = $verbosity;
108
109 # as are the outhandle and failhandle
110 $self->{'outhandle'} = $outhandle if defined $outhandle;
111 $self->{'failhandle'} = $failhandle;
112
113}
114
115# called once, after all passes have finished
116sub deinit {
117 my ($self) = @_;
118
119}
120
121# called at the beginning of each plugin pass (import has one, building has many)
122sub begin {
123 my $self = shift (@_);
124 my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
125
126 my $proc_package_name = ref $processor;
127
128 if ($proc_package_name !~ /buildproc$/ && $self->{'incremental'} == 1) {
129
130 # Only lookup timestamp info for import.pl, and only if incremental is set
131
132 my $output_dir = $processor->getoutputdir();
133## my $archives_inf = &util::filename_cat($output_dir,"archives.inf");
134 my $doc_db = "archiveinf-doc.gdb";
135 my $archives_inf = &util::filename_cat($output_dir,$doc_db);
136
137 if ( -e $archives_inf ) {
138 $self->{'inf_timestamp'} = -M $archives_inf;
139 }
140 }
141}
142
143sub removeold {
144 my $self = shift (@_);
145 my ($pluginfo, $base_dir, $processor, $maxdocs) = @_;
146
147}
148# called at the end of each plugin pass
149sub end {
150 my ($self) = shift (@_);
151
152}
153
154
155
156# return 1 if this class might recurse using $pluginfo
157sub is_recursive {
158 my $self = shift (@_);
159
160 return 1;
161}
162
163sub get_default_block_exp {
164 my $self = shift (@_);
165
166 return '(?i)(CVS|\.svn|Thumbs\.db|OIDcount|~)$';
167}
168
169sub check_directory_path {
170
171 my $self = shift(@_);
172 my ($dirname) = @_;
173
174 return undef unless (-d $dirname);
175
176 return 0 if ($self->{'block_exp'} ne "" && $dirname =~ /$self->{'block_exp'}/);
177
178 my $outhandle = $self->{'outhandle'};
179
180 # check to make sure we're not reading the archives or index directory
181 my $gsdlhome = quotemeta($ENV{'GSDLHOME'});
182 if ($dirname =~ m/^$gsdlhome\/.*?\/import.*?\/(archives|index)$/) {
183 print $outhandle "DirectoryPlugin: $dirname appears to be a reference to a Greenstone collection, skipping.\n";
184 return 0;
185 }
186
187 # check to see we haven't got a cyclic path...
188 if ($dirname =~ m%(/.*){,41}%) {
189 print $outhandle "DirectoryPlugin: $dirname is 40 directories deep, is this a recursive path? if not increase constant in DirectoryPlugin.pm.\n";
190 return 0;
191 }
192
193 # check to see we haven't got a cyclic path...
194 if ($dirname =~ m%.*?import/(.+?)/import/\1.*%) {
195 print $outhandle "DirectoryPlugin: $dirname appears to be in a recursive loop...\n";
196 return 0;
197 }
198
199 return 1;
200}
201
202# this may be called more than once
203sub sort_out_associated_files {
204
205 my $self = shift (@_);
206 my ($block_hash) = @_;
207 if (!scalar (keys %{$block_hash->{'shared_fileroot'}})) {
208 return;
209 }
210
211 $self->{'assocfile_info'} = {} unless defined $self->{'assocfile_info'};
212 my $metadata = $self->{'assocfile_info'};
213 foreach my $prefix (keys %{$block_hash->{'shared_fileroot'}}) {
214 my $record = $block_hash->{'shared_fileroot'}->{$prefix};
215
216 my $tie_to = $record->{'tie_to'};
217 my $exts = $record->{'exts'};
218
219 if ((defined $tie_to) && (scalar (keys %$exts) > 0)) {
220 # set up fileblocks and assocfile_tobe
221 my $base_file = "$prefix$tie_to";
222 $metadata->{$base_file} = {} unless defined $metadata->{$base_file};
223 my $base_file_metadata = $metadata->{$base_file};
224
225 $base_file_metadata->{'gsdlassocfile_tobe'} = [] unless defined $base_file_metadata->{'gsdlassocfile_tobe'};
226 my $assoc_tobe = $base_file_metadata->{'gsdlassocfile_tobe'};
227 foreach my $e (keys %$exts) {
228 # block the file
229 $block_hash->{'file_blocks'}->{"$prefix$e"} = 1;
230 # set up as an associatd file
231 print STDERR " $self->{'plugin_type'}: Associating $prefix$e with $tie_to version\n";
232 my $mime_type = ""; # let system auto detect this
233 push(@$assoc_tobe,"$prefix$e:$mime_type:");
234
235 }
236 }
237 } # foreach record
238
239 $block_hash->{'shared_fileroot'} = undef;
240 $block_hash->{'shared_fileroot'} = {};
241
242}
243
244
245# do block exp OR special blocking ???
246
247sub file_is_blocked {
248 my $self = shift (@_);
249 my ($block_hash, $filename_full_path) = @_;
250
251 if (defined $block_hash->{'file_blocks'}->{$filename_full_path}) {
252 $self->{'num_blocked'} ++;
253 return 1;
254 }
255 # check Directory plugin's own block_exp
256 if ($self->{'block_exp'} ne "" && $filename_full_path =~ /$self->{'block_exp'}/) {
257 $self->{'num_blocked'} ++;
258 return 1; # blocked
259 }
260 return 0;
261}
262
263
264
265sub file_block_read {
266 my $self = shift (@_);
267 my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
268
269 my $outhandle = $self->{'outhandle'};
270 my $verbosity = $self->{'verbosity'};
271
272 # Calculate the directory name and ensure it is a directory and
273 # that it is not explicitly blocked.
274 my $dirname = $file;
275 $dirname = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
276
277 my $directory_ok = $self->check_directory_path($dirname);
278 return $directory_ok unless (defined $directory_ok && $directory_ok == 1);
279
280 print $outhandle "Global file scan checking directory: $dirname\n";
281
282 $block_hash->{'all_files'} = {} unless defined $block_hash->{'all_files'};
283 $block_hash->{'metadata_files'} = {} unless defined $block_hash->{'metadata_files'};
284
285 $block_hash->{'file_blocks'} = {} unless defined $block_hash->{'file_blocks'};
286 $block_hash->{'shared_fileroot'} = {} unless defined $block_hash->{'shared_fileroot'};
287
288 # Recur over directory contents.
289 my (@dir, $subfile);
290 #my $count = 0;
291
292 print $outhandle "DirectoryPlugin block: getting directory $dirname\n" if ($verbosity > 2);
293
294 # find all the files in the directory
295 if (!opendir (DIR, $dirname)) {
296 if ($gli) {
297 print STDERR "<ProcessingError n='$file' r='Could not read directory $dirname'>\n";
298 }
299 print $outhandle "DirectoryPlugin: WARNING - couldn't read directory $dirname\n";
300 return -1; # error in processing
301 }
302 @dir = readdir (DIR);
303 closedir (DIR);
304
305 for (my $i = 0; $i < scalar(@dir); $i++) {
306 my $subfile = $dir[$i];
307 my $this_file_base_dir = $base_dir;
308 next if ($subfile =~ m/^\.\.?$/);
309
310 # Recursively read each $subfile
311 print $outhandle "DirectoryPlugin block recurring: $subfile\n" if ($verbosity > 2);
312
313 #$count += &plugin::file_block_read ($pluginfo, $this_file_base_dir,
314 &plugin::file_block_read ($pluginfo, $this_file_base_dir,
315 &util::filename_cat($file, $subfile),
316 $block_hash, $metadata, $gli);
317
318 }
319 $self->sort_out_associated_files($block_hash);
320 #return $count;
321
322}
323
324# We don't do metadata_read
325sub metadata_read {
326 my $self = shift (@_);
327 my ($pluginfo, $base_dir, $file, $block_hash,
328 $extrametakeys, $extrametadata, $extrametafile,
329 $processor, $maxdocs, $gli) = @_;
330
331 return undef;
332}
333
334
335# return number of files processed, undef if can't process
336# Note that $base_dir might be "" and that $file might
337# include directories
338
339# This function passes around metadata hash structures. Metadata hash
340# structures are hashes that map from a (scalar) key (the metadata element
341# name) to either a scalar metadata value or a reference to an array of
342# such values.
343
344sub read {
345 my $self = shift (@_);
346 my ($pluginfo, $base_dir, $file, $block_hash, $in_metadata, $processor, $maxdocs, $total_count, $gli) = @_;
347
348 my $outhandle = $self->{'outhandle'};
349 my $verbosity = $self->{'verbosity'};
350
351 # Calculate the directory name and ensure it is a directory and
352 # that it is not explicitly blocked.
353 my $dirname;
354 if ($file eq "") {
355 $dirname = $base_dir;
356 } else {
357 $dirname = $file;
358 $dirname = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
359 }
360
361 my $directory_ok = $self->check_directory_path($dirname);
362 return $directory_ok unless (defined $directory_ok && $directory_ok == 1);
363
364 if (($verbosity > 2) && ((scalar keys %$in_metadata) > 0)) {
365 print $outhandle "DirectoryPlugin: metadata passed in: ",
366 join(", ", keys %$in_metadata), "\n";
367 }
368
369
370 # Recur over directory contents.
371 my (@dir, $subfile);
372 my $count = 0;
373
374 print $outhandle "DirectoryPlugin read: getting directory $dirname\n" if ($verbosity > 2);
375
376 # find all the files in the directory
377 if (!opendir (DIR, $dirname)) {
378 if ($gli) {
379 print STDERR "<ProcessingError n='$file' r='Could not read directory $dirname'>\n";
380 }
381 print $outhandle "DirectoryPlugin: WARNING - couldn't read directory $dirname\n";
382 return -1; # error in processing
383 }
384 @dir = readdir (DIR);
385 closedir (DIR);
386
387 # Re-order the files in the list so any directories ending with .all are moved to the end
388 for (my $i = scalar(@dir) - 1; $i >= 0; $i--) {
389 if (-d &util::filename_cat($dirname, $dir[$i]) && $dir[$i] =~ /\.all$/) {
390 push(@dir, splice(@dir, $i, 1));
391 }
392 }
393
394 # setup the metadata structures. we do a metadata_read pass to see if there is any additional metadata, then pass it to read
395
396 my $additionalmetadata = 0; # is there extra metadata available?
397 my %extrametadata; # maps from filespec to extra metadata keys
398 my %extrametafile; # maps from filespec to the metadata.xml (or similar) file it came from
399 my @extrametakeys; # keys of %extrametadata in order read
400
401
402 my $os_dirsep = &util::get_os_dirsep();
403 my $dirsep = &util::get_dirsep();
404 my $base_dir_regexp = $base_dir;
405 $base_dir_regexp =~ s/\//$os_dirsep/g;
406 my $local_dirname = $dirname;
407 $local_dirname =~ s/^$base_dir_regexp($os_dirsep)//;
408 $local_dirname .= $dirsep;
409
410 if (defined $self->{'subdir_extrametakeys'}->{$local_dirname}) {
411 my $extrakeys = $self->{'subdir_extrametakeys'}->{$local_dirname};
412 foreach my $ek (@$extrakeys) {
413 my $extrakeys_re = $ek->{'re'};
414 my $extrakeys_md = $ek->{'md'};
415 my $extrakeys_mf = $ek->{'mf'};
416 push(@extrametakeys,$extrakeys_re);
417 $extrametadata{$extrakeys_re} = $extrakeys_md;
418 $extrametafile{$extrakeys_re} = $extrakeys_mf;
419 }
420 delete($self->{'subdir_extrametakeys'}->{$local_dirname});
421 }
422
423 # apply metadata pass for each of the files in the directory
424 my $num_files = scalar(@dir);
425 for (my $i = 0; $i < scalar(@dir); $i++) {
426 my $subfile = $dir[$i];
427 my $this_file_base_dir = $base_dir;
428 last if ($maxdocs != -1 && $count >= $maxdocs);
429 next if ($subfile =~ m/^\.\.?$/);
430 my $file_subfile = &util::filename_cat($file, $subfile);
431 my $full_filename = &util::filename_cat($this_file_base_dir, $file_subfile);
432 if ($self->file_is_blocked($block_hash,$full_filename)) {
433 print STDERR "DirectoryPlugin: file $full_filename was blocked for metadata_read\n" if ($verbosity > 2);
434 next;
435 }
436
437 # Recursively read each $subfile
438 print $outhandle "DirectoryPlugin metadata recurring: $subfile\n" if ($verbosity > 2);
439
440 $count += &plugin::metadata_read ($pluginfo, $this_file_base_dir,
441 $file_subfile,$block_hash,
442 \@extrametakeys, \%extrametadata,
443 \%extrametafile,
444 $processor, $maxdocs, $gli);
445 $additionalmetadata = 1;
446 }
447
448 # filter out any extrametakeys that mention subdirectories and store
449 # for later use (i.e. when that sub-directory is being processed)
450
451 foreach my $ek (@extrametakeys) {
452 my ($subdir_re,$extrakey_dir) = &File::Basename::fileparse($ek);
453
454 $extrakey_dir =~ s/\\\./\./g; # remove RE syntax for .
455 $extrakey_dir =~ s/\\\\/\\/g; # remove RE syntax for \
456
457 my $dirsep_re = &util::get_re_dirsep();
458
459 my $ek_non_re = $ek;
460 $ek_non_re =~ s/\\\./\./g; # remove RE syntax for .
461 $ek_non_re =~ s/\\\\/\\/g; # remove RE syntax for \
462 if ($ek_non_re =~ m/$dirsep_re/) { # specifies at least one directory
463 my $md = $extrametadata{$ek};
464 my $mf = $extrametafile{$ek};
465
466 my $subdir_extrametakeys = $self->{'subdir_extrametakeys'};
467
468 my $subdir_rec = { 're' => $subdir_re, 'md' => $md, 'mf' => $mf };
469
470 # when its looked up, it must be relative to the base dir
471 push(@{$subdir_extrametakeys->{"$local_dirname$extrakey_dir"}},$subdir_rec);
472 #push(@{$subdir_extrametakeys->{"$extrakey_dir"}},$subdir_rec);
473 }
474 }
475
476 # import each of the files in the directory
477 $count=0;
478 for (my $i = 0; $i <= scalar(@dir); $i++) {
479 # When every file in the directory has been done, pause for a moment (figuratively!)
480 # If the -recheck_directories argument hasn't been provided, stop now (default)
481 # Otherwise, re-read the contents of the directory to check for new files
482 # Any new files are added to the @dir list and are processed as normal
483 # This is necessary when documents to be indexed are specified in bibliographic DBs
484 # These files are copied/downloaded and stored in a new folder at import time
485 if ($i == $num_files) {
486 last unless $self->{'recheck_directories'};
487
488 # Re-read the files in the directory to see if there are any new files
489 last if (!opendir (DIR, $dirname));
490 my @dirnow = readdir (DIR);
491 closedir (DIR);
492
493 # We're only interested if there are more files than there were before
494 last if (scalar(@dirnow) <= scalar(@dir));
495
496 # Any new files are added to the end of @dir to get processed by the loop
497 my $j;
498 foreach my $subfilenow (@dirnow) {
499 for ($j = 0; $j < $num_files; $j++) {
500 last if ($subfilenow eq $dir[$j]);
501 }
502 if ($j == $num_files) {
503 # New file
504 push(@dir, $subfilenow);
505 }
506 }
507 # When the new files have been processed, check again
508 $num_files = scalar(@dir);
509 }
510
511 my $subfile = $dir[$i];
512 my $this_file_base_dir = $base_dir;
513 last if ($maxdocs != -1 && ($count + $total_count) >= $maxdocs);
514 next if ($subfile =~ /^\.\.?$/);
515
516 my $file_subfile = &util::filename_cat($file, $subfile);
517 my $full_filename
518 = &util::filename_cat($this_file_base_dir,$file_subfile);
519
520 if ($self->file_is_blocked($block_hash,$full_filename)) {
521 print STDERR "DirectoryPlugin: file $full_filename was blocked for read\n" if ($verbosity > 2);
522 next;
523 }
524 #print STDERR "processing $full_filename\n";
525 # Follow Windows shortcuts
526 if ($subfile =~ /(?i)\.lnk$/ && $ENV{'GSDLOS'} =~ /^windows$/i) {
527 require Win32::Shortcut;
528 my $shortcut = new Win32::Shortcut(&util::filename_cat($dirname, $subfile));
529 if ($shortcut) {
530 # The file to be processed is now the target of the shortcut
531 $this_file_base_dir = "";
532 $file = "";
533 $subfile = $shortcut->Path;
534 }
535 }
536
537 # check for a symlink pointing back to a leading directory
538 if (-d "$dirname/$subfile" && -l "$dirname/$subfile") {
539 # readlink gives a "fatal error" on systems that don't implement
540 # symlinks. This assumes the the -l test above would fail on those.
541 my $linkdest=readlink "$dirname/$subfile";
542 if (!defined ($linkdest)) {
543 # system error - file not found?
544 warn "DirectoryPlugin: symlink problem - $!";
545 } else {
546 # see if link points to current or a parent directory
547 if ($linkdest =~ m@^[\./\\]+$@ ||
548 index($dirname, $linkdest) != -1) {
549 warn "DirectoryPlugin: Ignoring recursive symlink ($dirname/$subfile -> $linkdest)\n";
550 next;
551 ;
552 }
553 }
554 }
555
556 print $outhandle "DirectoryPlugin: preparing metadata for $subfile\n" if ($verbosity > 2);
557
558 # Make a copy of $in_metadata to pass to $subfile
559 my $out_metadata = {};
560 &metadatautil::combine_metadata_structures($out_metadata, $in_metadata);
561
562 # check the assocfile_info
563 if (defined $self->{'assocfile_info'}->{$full_filename}) {
564 &metadatautil::combine_metadata_structures($out_metadata, $self->{'assocfile_info'}->{$full_filename});
565 }
566 ## encode the filename as perl5 doesn't handle unicode filenames
567
568 my $tmpfile = Encode::encode_utf8($subfile);
569 #print STDERR "subfile = $subfile, tmpfile = $tmpfile\n";
570 # Next add metadata read in XML files (if it is supplied)
571 if ($additionalmetadata == 1) {
572 foreach my $filespec (@extrametakeys) {
573
574 ## use the utf8 encoded filename to do the filename comparison
575 if ($tmpfile =~ /^$filespec$/) {
576 print $outhandle "File \"$subfile\" matches filespec \"$filespec\"\n"
577 if ($verbosity > 2);
578 my $mdref = $extrametadata{$filespec};
579 my $mfref = $extrametafile{$filespec};
580
581 # Add the list files where the metadata came from
582 # into the metadata table so we can track this
583 # This mechanism is similar to how gsdlassocfile works
584
585 my @metafile_pair = ();
586 foreach my $l (keys %$mfref) {
587 my $f = $mfref->{$l};
588 push (@metafile_pair, "$f : $l");
589 }
590
591 $mdref->{'gsdlmetafile'} = \@metafile_pair;
592
593 &metadatautil::combine_metadata_structures($out_metadata, $mdref);
594 }
595 }
596 }
597
598 if (defined $self->{'inf_timestamp'}) {
599 # Look to see if it's a completely new file
600
601 if (!$block_hash->{'new_files'}->{$full_filename}) {
602 # Not a new file, must be an existing file
603 # Let' see if it's newer than the last import.pl
604
605
606 if (! -d $full_filename) {
607 if (!$block_hash->{'reindex_files'}->{$full_filename}) {
608 # filename has been around for longer than inf_timestamp
609 print $outhandle "**** Skipping $subfile\n" if ($verbosity >3);
610 next;
611 }
612 else {
613 # Remove old folder in archives (might hash to something different)
614 # *** should be doing this on a Del one as well
615 # but leave folder name?? and ensure hashs to
616 # same again??
617
618 # Then let through as new doc??
619
620 # mark to doc-oids that rely on it for re-indexing
621 ## &GDBMUtils::gdbmDatabase();
622 }
623 }
624 }
625 }
626
627 # Recursively read each $subfile
628 print $outhandle "DirectoryPlugin recurring: $subfile\n" if ($verbosity > 2);
629
630 $count += &plugin::read ($pluginfo, $this_file_base_dir,
631 $file_subfile, $block_hash,
632 $out_metadata, $processor, $maxdocs, ($total_count + $count), $gli);
633 }
634
635 return $count;
636}
637
638sub compile_stats {
639 my $self = shift(@_);
640 my ($stats) = @_;
641}
642
6431;
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