root/main/trunk/greenstone2/perllib/util.pm @ 24971

Revision 24971, 46.8 KB (checked in by ak19, 8 years ago)

1. Introduced the util::filepath_to_url_format subroutine which will be used to convert filenames to URL style filenames to match the slashes used in the filename regex-es in extrameta keys used to index into extrameta data structures. 2. Fixed bug on windows where metadata.xml specifies filenames as regex with backslash in front of the file extension's period mark: DirectoryPlugin? needed to unregex the filepath before calling fileparse on it, else the escaping backslash would interfere with perl's fileparse routine (only on windows, since backslash also represents a dirsep here). 3. Updated all those perl plugins where the new util::filepath_to_url_format needs to be called so that they use URL style filenames (thereafter regexed) to index into the extrameta data structures.

  • Property svn:keywords set to Author Date Id Revision
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1###########################################################################
2#
3# util.pm -- various useful utilities
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
26package util;
27
28use strict;
29
30use Encode;
31use File::Copy;
32use File::Basename;
33# Config for getting the perlpath in the recommended way, though it uses paths that are
34# hard-coded into the Config file that's generated upon configuring and compiling perl.
35# $^X works better in some cases to return the path to perl used to launch the script,
36# but if launched with plain "perl" (no full-path), that will be just what it returns.
37use Config;
38
39# removes files (but not directories)
40sub rm {
41    my (@files) = @_;
42
43    my @filefiles = ();
44
45    # make sure the files we want to delete exist
46    # and are regular files
47    foreach my $file (@files) {
48    if (!-e $file) {
49        print STDERR "util::rm $file does not exist\n";
50    } elsif ((!-f $file) && (!-l $file)) {
51        print STDERR "util::rm $file is not a regular (or symbolic) file\n";
52    } else {
53        push (@filefiles, $file);
54    }
55    }
56   
57    # remove the files
58    my $numremoved = unlink @filefiles;
59
60    # check to make sure all of them were removed
61    if ($numremoved != scalar(@filefiles)) {
62    print STDERR "util::rm Not all files were removed\n";
63    }
64}
65
66# removes files (but not directories) - can rename this to the default
67# "rm" subroutine  when debugging the deletion of individual files.
68sub rm_debug {
69    my (@files) = @_;
70    my @filefiles = ();
71
72    # make sure the files we want to delete exist
73    # and are regular files
74    foreach my $file (@files) {
75        if (!-e $file) {
76            print STDERR "util::rm $file does not exist\n";
77        } elsif ((!-f $file) && (!-l $file)) {
78            print STDERR "util::rm $file is not a regular (or symbolic) file\n";
79        } else { # debug message
80            unlink($file) or warn "Could not delete file $file: $!\n";
81        }
82    }
83}
84
85
86# recursive removal
87sub filtered_rm_r {
88    my ($files,$file_accept_re,$file_reject_re) = @_;
89
90#   my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(2);
91#   my ($lcfilename) = ($cfilename =~ m/([^\\\/]*)$/);
92#   print STDERR "** Calling method (2): $lcfilename:$cline $cpackage->$csubr\n";
93   
94    my @files_array = (ref $files eq "ARRAY") ? @$files : ($files);
95
96    # recursively remove the files
97    foreach my $file (@files_array) {
98    $file =~ s/[\/\\]+$//; # remove trailing slashes
99   
100    if (!-e $file) {
101        print STDERR "util::filtered_rm_r $file does not exist\n";
102
103    } elsif ((-d $file) && (!-l $file)) { # don't recurse down symbolic link
104        # get the contents of this directory
105        if (!opendir (INDIR, $file)) {
106        print STDERR "util::filtered_rm_r could not open directory $file\n";
107        } else {
108        my @filedir = grep (!/^\.\.?$/, readdir (INDIR));
109        closedir (INDIR);
110               
111        # remove all the files in this directory
112        map {$_="$file/$_";} @filedir;
113        &filtered_rm_r (\@filedir,$file_accept_re,$file_reject_re);
114
115        if (!defined $file_accept_re && !defined $file_reject_re) {
116            # remove this directory
117            if (!rmdir $file) {
118            print STDERR "util::filtered_rm_r couldn't remove directory $file\n";
119            }
120        }
121        }
122    } else {
123        next if (defined $file_reject_re && ($file =~ m/$file_reject_re/));
124
125        if ((!defined $file_accept_re) || ($file =~ m/$file_accept_re/)) {
126        # remove this file 
127        &rm ($file);
128        }
129    }
130    }
131}
132
133
134# recursive removal
135sub rm_r {
136    my (@files) = @_;
137   
138    # use the more general (but reterospectively written function
139    # filtered_rm_r function()
140
141    filtered_rm_r(\@files,undef,undef); # no accept or reject expressions
142}
143
144
145
146
147# moves a file or a group of files
148sub mv {
149    my $dest = pop (@_);
150    my (@srcfiles) = @_;
151
152    # remove trailing slashes from source and destination files
153    $dest =~ s/[\\\/]+$//;
154    map {$_ =~ s/[\\\/]+$//;} @srcfiles;
155
156    # a few sanity checks
157    if (scalar (@srcfiles) == 0) {
158    print STDERR "util::mv no destination directory given\n";
159    return;
160    } elsif ((scalar (@srcfiles) > 1) && (!-d $dest)) {
161    print STDERR "util::mv if multiple source files are given the ".
162        "destination must be a directory\n";
163    return;
164    }
165
166    # move the files
167    foreach my $file (@srcfiles) {
168    my $tempdest = $dest;
169    if (-d $tempdest) {
170        my ($filename) = $file =~ /([^\\\/]+)$/;
171        $tempdest .= "/$filename";
172    }
173    if (!-e $file) {
174        print STDERR "util::mv $file does not exist\n";
175    } else {
176        rename ($file, $tempdest);
177    }
178    }
179}
180
181
182# copies a file or a group of files
183sub cp {
184    my $dest = pop (@_);
185    my (@srcfiles) = @_;
186
187    # remove trailing slashes from source and destination files
188    $dest =~ s/[\\\/]+$//;
189    map {$_ =~ s/[\\\/]+$//;} @srcfiles;
190
191    # a few sanity checks
192    if (scalar (@srcfiles) == 0) {
193    print STDERR "util::cp no destination directory given\n";
194    return;
195    } elsif ((scalar (@srcfiles) > 1) && (!-d $dest)) {
196    print STDERR "util::cp if multiple source files are given the ".
197        "destination must be a directory\n";
198    return;
199    }
200
201    # copy the files
202    foreach my $file (@srcfiles) {
203    my $tempdest = $dest;
204    if (-d $tempdest) {
205        my ($filename) = $file =~ /([^\\\/]+)$/;
206        $tempdest .= "/$filename";
207    }
208    if (!-e $file) {
209        print STDERR "util::cp $file does not exist\n";
210    } elsif (!-f $file) {
211        print STDERR "util::cp $file is not a plain file\n";
212    } else {
213        &File::Copy::copy ($file, $tempdest);
214    }
215    }
216}
217
218
219
220# recursively copies a file or group of files
221# syntax: cp_r (sourcefiles, destination directory)
222# destination must be a directory - to copy one file to
223# another use cp instead
224sub cp_r {
225    my $dest = pop (@_);
226    my (@srcfiles) = @_;
227
228    # a few sanity checks
229    if (scalar (@srcfiles) == 0) {
230    print STDERR "util::cp_r no destination directory given\n";
231    return;
232    } elsif (-f $dest) {
233    print STDERR "util::cp_r destination must be a directory\n";
234    return;
235    }
236   
237    # create destination directory if it doesn't exist already
238    if (! -d $dest) {
239    my $store_umask = umask(0002);
240    mkdir ($dest, 0777);
241    umask($store_umask);
242    }
243
244    # copy the files
245    foreach my $file (@srcfiles) {
246
247    if (!-e $file) {
248        print STDERR "util::cp_r $file does not exist\n";
249
250    } elsif (-d $file) {
251        # make the new directory
252        my ($filename) = $file =~ /([^\\\/]*)$/;
253        $dest = &util::filename_cat ($dest, $filename);
254        my $store_umask = umask(0002);
255        mkdir ($dest, 0777);
256        umask($store_umask);
257
258        # get the contents of this directory
259        if (!opendir (INDIR, $file)) {
260        print STDERR "util::cp_r could not open directory $file\n";
261        } else {
262        my @filedir = readdir (INDIR);
263        closedir (INDIR);
264        foreach my $f (@filedir) {
265            next if $f =~ /^\.\.?$/;
266            # copy all the files in this directory
267            my $ff = &util::filename_cat ($file, $f);
268            &cp_r ($ff, $dest);
269        }
270        }
271
272    } else {
273        &cp($file, $dest);
274    }
275    }
276}
277# recursively copies a file or group of files
278# syntax: cp_r (sourcefiles, destination directory)
279# destination must be a directory - to copy one file to
280# another use cp instead
281sub cp_r_nosvn {
282    my $dest = pop (@_);
283    my (@srcfiles) = @_;
284
285    # a few sanity checks
286    if (scalar (@srcfiles) == 0) {
287    print STDERR "util::cp_r no destination directory given\n";
288    return;
289    } elsif (-f $dest) {
290    print STDERR "util::cp_r destination must be a directory\n";
291    return;
292    }
293   
294    # create destination directory if it doesn't exist already
295    if (! -d $dest) {
296    my $store_umask = umask(0002);
297    mkdir ($dest, 0777);
298    umask($store_umask);
299    }
300
301    # copy the files
302    foreach my $file (@srcfiles) {
303
304    if (!-e $file) {
305        print STDERR "util::cp_r $file does not exist\n";
306
307    } elsif (-d $file) {
308        # make the new directory
309        my ($filename) = $file =~ /([^\\\/]*)$/;
310        $dest = &util::filename_cat ($dest, $filename);
311        my $store_umask = umask(0002);
312        mkdir ($dest, 0777);
313        umask($store_umask);
314
315        # get the contents of this directory
316        if (!opendir (INDIR, $file)) {
317        print STDERR "util::cp_r could not open directory $file\n";
318        } else {
319        my @filedir = readdir (INDIR);
320        closedir (INDIR);
321        foreach my $f (@filedir) {
322            next if $f =~ /^\.\.?$/;
323            next if $f =~ /^\.svn$/;
324            # copy all the files in this directory
325            my $ff = &util::filename_cat ($file, $f);
326            &cp_r ($ff, $dest);
327        }
328        }
329
330    } else {
331        &cp($file, $dest);
332    }
333    }
334}
335
336# copies a directory and its contents, excluding subdirectories, into a new directory
337sub cp_r_toplevel {
338    my $dest = pop (@_);
339    my (@srcfiles) = @_;
340
341    # a few sanity checks
342    if (scalar (@srcfiles) == 0) {
343    print STDERR "util::cp_r no destination directory given\n";
344    return;
345    } elsif (-f $dest) {
346    print STDERR "util::cp_r destination must be a directory\n";
347    return;
348    }
349   
350    # create destination directory if it doesn't exist already
351    if (! -d $dest) {
352    my $store_umask = umask(0002);
353    mkdir ($dest, 0777);
354    umask($store_umask);
355    }
356
357    # copy the files
358    foreach my $file (@srcfiles) {
359
360    if (!-e $file) {
361        print STDERR "util::cp_r $file does not exist\n";
362
363    } elsif (-d $file) {
364        # make the new directory
365        my ($filename) = $file =~ /([^\\\/]*)$/;
366        $dest = &util::filename_cat ($dest, $filename);
367        my $store_umask = umask(0002);
368        mkdir ($dest, 0777);
369        umask($store_umask);
370
371        # get the contents of this directory
372        if (!opendir (INDIR, $file)) {
373        print STDERR "util::cp_r could not open directory $file\n";
374        } else {
375        my @filedir = readdir (INDIR);
376        closedir (INDIR);
377        foreach my $f (@filedir) {
378            next if $f =~ /^\.\.?$/;
379           
380            # copy all the files in this directory, but not directories
381            my $ff = &util::filename_cat ($file, $f);
382            if (-f $ff) {
383            &cp($ff, $dest);
384            #&cp_r ($ff, $dest);
385            }
386        }
387        }
388
389    } else {
390        &cp($file, $dest);
391    }
392    }
393}
394
395sub mk_dir {
396    my ($dir) = @_;
397
398    my $store_umask = umask(0002);
399    my $mkdir_ok = mkdir ($dir, 0777);
400    umask($store_umask);
401   
402    if (!$mkdir_ok)
403    {
404    print STDERR "util::mk_dir could not create directory $dir\n";
405    return;
406    }
407}
408
409# in case anyone cares - I did some testing (using perls Benchmark module)
410# on this subroutine against File::Path::mkpath (). mk_all_dir() is apparently
411# slightly faster (surprisingly) - Stefan.
412sub mk_all_dir {
413    my ($dir) = @_;
414
415    # use / for the directory separator, remove duplicate and
416    # trailing slashes
417    $dir=~s/[\\\/]+/\//g;
418    $dir=~s/[\\\/]+$//;
419
420    # make sure the cache directory exists
421    my $dirsofar = "";
422    my $first = 1;
423    foreach my $dirname (split ("/", $dir)) {
424    $dirsofar .= "/" unless $first;
425    $first = 0;
426
427    $dirsofar .= $dirname;
428
429    next if $dirname =~ /^(|[a-z]:)$/i;
430    if (!-e $dirsofar)
431        {
432        my $store_umask = umask(0002);
433        my $mkdir_ok = mkdir ($dirsofar, 0777);
434        umask($store_umask);
435        if (!$mkdir_ok)
436        {
437            print STDERR "util::mk_all_dir could not create directory $dirsofar\n";
438            return;
439        }
440        }
441    }
442}
443
444# make hard link to file if supported by OS, otherwise copy the file
445sub hard_link {
446    my ($src, $dest, $verbosity) = @_;
447
448    # remove trailing slashes from source and destination files
449    $src =~ s/[\\\/]+$//;
450    $dest =~ s/[\\\/]+$//;
451
452##    print STDERR "**** src = ", unicode::debug_unicode_string($src),"\n";
453    # a few sanity checks
454    if (-e $dest) {
455    # destination file already exists
456    return;
457    }
458    elsif (!-e $src) {
459    print STDERR "util::hard_link source file \"$src\" does not exist\n";
460    return 1;
461    }
462    elsif (-d $src) {
463    print STDERR "util::hard_link source \"$src\" is a directory\n";
464    return 1;
465    }
466
467    my $dest_dir = &File::Basename::dirname($dest);
468    mk_all_dir($dest_dir) if (!-e $dest_dir);
469
470
471    if (!link($src, $dest)) {
472    if ((!defined $verbosity) || ($verbosity>2)) {
473        print STDERR "util::hard_link: unable to create hard link. ";
474        print STDERR " Copying file: $src -> $dest\n";
475    }
476    &File::Copy::copy ($src, $dest);
477    }
478    return 0;
479}
480
481# make soft link to file if supported by OS, otherwise copy file
482sub soft_link {
483    my ($src, $dest, $ensure_paths_absolute) = @_;
484
485    # remove trailing slashes from source and destination files
486    $src =~ s/[\\\/]+$//;
487    $dest =~ s/[\\\/]+$//;
488
489    # Ensure file paths are absolute IF requested to do so
490    # Soft_linking didn't work for relative paths
491    if(defined $ensure_paths_absolute && $ensure_paths_absolute) {
492    # We need to ensure that the src file is the absolute path
493    # See http://perldoc.perl.org/File/Spec.html
494    if(!File::Spec->file_name_is_absolute( $src ))  { # it's relative
495        $src = File::Spec->rel2abs($src); # make absolute
496    }
497    # Might as well ensure that the destination file's absolute path is used
498    if(!File::Spec->file_name_is_absolute( $dest )) {
499        $dest = File::Spec->rel2abs($dest); # make absolute
500    }
501    }
502
503    # a few sanity checks
504    if (!-e $src) {
505    print STDERR "util::soft_link source file $src does not exist\n";
506    return 0;
507    }
508
509    my $dest_dir = &File::Basename::dirname($dest);
510    mk_all_dir($dest_dir) if (!-e $dest_dir);
511
512    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
513       
514    # symlink not supported on windows
515    &File::Copy::copy ($src, $dest);
516
517    } elsif (!eval {symlink($src, $dest)}) {
518    print STDERR "util::soft_link: unable to create soft link.\n";
519    return 0;
520    }
521
522    return 1;
523}
524
525# Primarily for filenames generated by processing
526# content of HTML files (which are mapped to UTF-8 internally)
527#
528# To turn this into an octet string that really exists on the file
529# system:
530# 1. don't need to do anything special for Unix-based systems
531#   (as underlying file system is byte-code)
532# 2. need to map to short DOS filenames for Windows
533
534sub utf8_to_real_filename
535{
536    my ($utf8_filename) = @_;
537
538    my $real_filename;
539
540    if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
541    require Win32;
542
543    print STDERR "***** utf8 filename = $utf8_filename\n\n\n";
544
545    my $unicode_filename = decode("utf8",$utf8_filename);
546    $real_filename = Win32::GetShortPathName($unicode_filename);
547    }
548    else {
549    $real_filename = $utf8_filename;
550    }
551
552    return $real_filename;
553}
554
555
556sub fd_exists
557{
558    my $filename_full_path = shift @_;
559    my $test_op = shift @_ || "-e";
560
561    # By default tests for existance of file or directory (-e)
562    # Can be made more specific by providing second parameter (e.g. -f or -d)
563
564    my $exists = 0;
565
566    if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
567    require Win32;
568    my $filename_short_path = Win32::GetShortPathName($filename_full_path);
569    if (!defined $filename_short_path) {
570        # Was probably still in UTF8 form (not what is needed on Windows)
571        my $unicode_filename_full_path = eval "decode(\"utf8\",\$filename_full_path)";
572        if (defined $unicode_filename_full_path) {
573        $filename_short_path = Win32::GetShortPathName($unicode_filename_full_path);
574        }
575    }
576    $filename_full_path = $filename_short_path;
577    }
578
579    if (defined $filename_full_path) {
580    $exists = eval "($test_op \$filename_full_path)";
581    }
582
583    return $exists;
584}
585
586sub file_exists
587{
588    my ($filename_full_path) = @_;
589
590    return fd_exists($filename_full_path,"-f");
591}
592
593sub dir_exists
594{
595    my ($filename_full_path) = @_;
596
597    return fd_exists($filename_full_path,"-d");
598}
599
600
601
602# updates a copy of a directory in some other part of the filesystem
603# verbosity settings are: 0=low, 1=normal, 2=high
604# both $fromdir and $todir should be absolute paths
605sub cachedir {
606    my ($fromdir, $todir, $verbosity) = @_;
607    $verbosity = 1 unless defined $verbosity;
608
609    # use / for the directory separator, remove duplicate and
610    # trailing slashes
611    $fromdir=~s/[\\\/]+/\//g;
612    $fromdir=~s/[\\\/]+$//;
613    $todir=~s/[\\\/]+/\//g;
614    $todir=~s/[\\\/]+$//;
615
616    &mk_all_dir ($todir);
617
618    # get the directories in ascending order
619    if (!opendir (FROMDIR, $fromdir)) {
620    print STDERR "util::cachedir could not read directory $fromdir\n";
621    return;
622    }
623    my @fromdir = grep (!/^\.\.?$/, sort(readdir (FROMDIR)));
624    closedir (FROMDIR);
625
626    if (!opendir (TODIR, $todir)) {
627    print STDERR "util::cacedir could not read directory $todir\n";
628    return;
629    }
630    my @todir = grep (!/^\.\.?$/, sort(readdir (TODIR)));
631    closedir (TODIR);
632
633    my $fromi = 0;
634    my $toi = 0;
635           
636    while ($fromi < scalar(@fromdir) || $toi < scalar(@todir)) {
637#   print "fromi: $fromi toi: $toi\n";
638
639    # see if we should delete a file/directory
640    # this should happen if the file/directory
641    # is not in the from list or if its a different
642    # size, or has an older timestamp
643    if ($toi < scalar(@todir)) {
644        if (($fromi >= scalar(@fromdir)) ||
645        ($todir[$toi] lt $fromdir[$fromi] ||
646         ($todir[$toi] eq $fromdir[$fromi] &&
647          &differentfiles("$fromdir/$fromdir[$fromi]","$todir/$todir[$toi]",
648                  $verbosity)))) {
649
650        # the files are different
651        &rm_r("$todir/$todir[$toi]");
652        splice(@todir, $toi, 1); # $toi stays the same
653
654        } elsif ($todir[$toi] eq $fromdir[$fromi]) {
655        # the files are the same
656        # if it is a directory, check its contents
657        if (-d "$todir/$todir[$toi]") {
658            &cachedir ("$fromdir/$fromdir[$fromi]",
659                   "$todir/$todir[$toi]", $verbosity);
660        }
661
662        $toi++;
663        $fromi++;
664        next;
665        }
666    }
667 
668    # see if we should insert a file/directory
669    # we should insert a file/directory if there
670    # is no tofiles left or if the tofile does not exist
671    if ($fromi < scalar(@fromdir) && ($toi >= scalar(@todir) ||
672                      $todir[$toi] gt $fromdir[$fromi])) {
673        &cp_r ("$fromdir/$fromdir[$fromi]", "$todir/$fromdir[$fromi]");
674        splice (@todir, $toi, 0, $fromdir[$fromi]);
675
676        $toi++;
677        $fromi++;
678    }
679    }
680}
681
682# this function returns -1 if either file is not found
683# assumes that $file1 and $file2 are absolute file names or
684# in the current directory
685# $file2 is allowed to be newer than $file1
686sub differentfiles {
687    my ($file1, $file2, $verbosity) = @_;
688    $verbosity = 1 unless defined $verbosity;
689
690    $file1 =~ s/\/+$//;
691    $file2 =~ s/\/+$//;
692   
693    my ($file1name) = $file1 =~ /\/([^\/]*)$/;
694    my ($file2name) = $file2 =~ /\/([^\/]*)$/;
695
696    return -1 unless (-e $file1 && -e $file2);
697    if ($file1name ne $file2name) {
698    print STDERR "filenames are not the same\n" if ($verbosity >= 2);
699    return 1;
700    }
701
702    my @file1stat = stat ($file1);
703    my @file2stat = stat ($file2);
704
705    if (-d $file1) {
706    if (! -d $file2) {
707        print STDERR "one file is a directory\n" if ($verbosity >= 2);
708        return 1;
709    }
710    return 0;
711    }
712
713    # both must be regular files
714    unless (-f $file1 && -f $file2) {
715    print STDERR "one file is not a regular file\n" if ($verbosity >= 2);
716    return 1;
717    }
718
719    # the size of the files must be the same
720    if ($file1stat[7] != $file2stat[7]) {
721    print STDERR "different sized files\n" if ($verbosity >= 2);
722    return 1;
723    }
724
725    # the second file cannot be older than the first
726    if ($file1stat[9] > $file2stat[9]) {
727    print STDERR "file is older\n" if ($verbosity >= 2);
728    return 1;
729    }
730
731    return 0;
732}
733
734
735sub get_tmp_filename
736{
737    my $file_ext = shift(@_) || undef;
738
739    my $opt_dot_file_ext = "";
740    if (defined $file_ext) {
741    if ($file_ext !~ m/\./) {
742        # no dot, so needs one added in at start
743        $opt_dot_file_ext = ".$file_ext"
744    }
745    else {
746        # allow for "extensions" such as _metadata.txt to be handled
747        # gracefully
748        $opt_dot_file_ext = $file_ext;
749    }
750    }
751
752    my $tmpdir = filename_cat($ENV{'GSDLHOME'}, "tmp");
753    &mk_all_dir ($tmpdir) unless -e $tmpdir;
754
755    my $count = 1000;
756    my $rand = int(rand $count);
757    my $full_tmp_filename = &filename_cat($tmpdir, "F$rand$opt_dot_file_ext");
758
759    while (-e $full_tmp_filename) {
760    $rand = int(rand $count);
761    $full_tmp_filename = &filename_cat($tmpdir, "F$rand$opt_dot_file_ext");
762    $count++;
763    }
764   
765    return $full_tmp_filename;
766}
767
768sub get_timestamped_tmp_folder
769{
770
771    my $tmp_dirname;
772    if(defined $ENV{'GSDLCOLLECTDIR'}) {
773    $tmp_dirname = $ENV{'GSDLCOLLECTDIR'};
774    } elsif(defined $ENV{'GSDLHOME'}) {
775    $tmp_dirname = $ENV{'GSDLHOME'};
776    } else {
777    return undef;
778    }
779
780    $tmp_dirname = &util::filename_cat($tmp_dirname, "tmp");
781    &util::mk_dir($tmp_dirname) if (!-e $tmp_dirname);
782
783    # add the timestamp into the path otherwise we can run into problems
784    # if documents have the same name
785    my $timestamp = time;
786    my $time_tmp_dirname = &util::filename_cat($tmp_dirname, $timestamp);
787    $tmp_dirname = $time_tmp_dirname;
788    my $i = 1;
789    while (-e $tmp_dirname) {
790    $tmp_dirname = "$time_tmp_dirname$i";
791    $i++;
792    }
793    &util::mk_dir($tmp_dirname);
794 
795    return $tmp_dirname;
796}
797
798sub get_timestamped_tmp_filename_in_collection
799{
800
801    my ($input_filename, $output_ext) = @_;
802    # derive tmp filename from input filename
803    my ($tailname, $dirname, $suffix)
804    = &File::Basename::fileparse($input_filename, "\\.[^\\.]+\$");
805
806    # softlink to collection tmp dir
807    my $tmp_dirname = &util::get_timestamped_tmp_folder();
808    $tmp_dirname = $dirname unless defined $tmp_dirname;
809
810    # following two steps copied from ConvertBinaryFile
811    # do we need them?? can't use them as is, as they use plugin methods.
812
813    #$tailname = $self->SUPER::filepath_to_utf8($tailname) unless &unicode::check_is_utf8($tailname);
814
815    # URLEncode this since htmls with images where the html filename is utf8 don't seem
816    # to work on Windows (IE or Firefox), as browsers are looking for filesystem-encoded
817    # files on the filesystem.
818    #$tailname = &util::rename_file($tailname, $self->{'file_rename_method'}, "without_suffix");
819    if (defined $output_ext) {
820    $output_ext = ".$output_ext"; # add the dot
821    } else {
822    $output_ext = $suffix;
823    }
824    $output_ext= lc($output_ext);
825    my $tmp_filename = &util::filename_cat($tmp_dirname, "$tailname$output_ext");
826   
827    return $tmp_filename;
828}
829
830sub get_toplevel_tmp_dir
831{
832    return filename_cat($ENV{'GSDLHOME'}, "tmp");
833}
834
835
836sub filename_to_regex {
837    my $filename = shift (@_);
838
839    # need to make single backslashes double so that regex works
840    $filename =~ s/\\/\\\\/g; # if ($ENV{'GSDLOS'} =~ /^windows$/i);   
841   
842    # note that the first part of a substitution is a regex, so RE chars need to be escaped,
843    # the second part of a substitution is not a regex, so for e.g. full-stop can be specified literally
844    $filename =~ s/\./\\./g; # in case there are extensions/other full stops, escape them
845    $filename =~ s@\(@\\(@g; # escape brackets
846    $filename =~ s@\)@\\)@g; # escape brackets
847    $filename =~ s@\[@\\[@g; # escape brackets
848    $filename =~ s@\]@\\]@g; # escape brackets
849   
850    return $filename;
851}
852
853sub unregex_filename {
854    my $filename = shift (@_);
855
856    # need to put doubled backslashes for regex back to single
857    $filename =~ s/\\\./\./g; # remove RE syntax for .
858    $filename =~ s@\\\(@(@g; # remove RE syntax for ( => "\(" turns into "("
859    $filename =~ s@\\\)@)@g; # remove RE syntax for ) => "\)" turns into ")"
860    $filename =~ s@\\\[@[@g; # remove RE syntax for [ => "\[" turns into "["
861    $filename =~ s@\\\]@]@g; # remove RE syntax for ] => "\]" turns into "]"
862   
863    # \\ goes to \
864    # This is the last step in reverse mirroring the order of steps in filename_to_regex()
865    $filename =~ s/\\\\/\\/g; # remove RE syntax for \   
866    return $filename;
867}
868
869sub filename_cat {
870    my $first_file = shift(@_);
871    my (@filenames) = @_;
872
873#   Useful for debugging
874#     -- might make sense to call caller(0) rather than (1)??
875#   my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
876#   print STDERR "Calling method: $cfilename:$cline $cpackage->$csubr\n";
877   
878    # If first_file is not null or empty, then add it back into the list
879    if (defined $first_file && $first_file =~ /\S/) {
880    unshift(@filenames, $first_file);
881    }
882
883    my $filename = join("/", @filenames);
884
885    # remove duplicate slashes and remove the last slash
886    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
887    $filename =~ s/[\\\/]+/\\/g;
888    } else {
889    $filename =~ s/[\/]+/\//g;
890    # DB: want a filename abc\de.html to remain like this
891    }
892    $filename =~ s/[\\\/]$//;
893
894    return $filename;
895}
896
897
898sub pathname_cat {
899    my $first_path = shift(@_);
900    my (@pathnames) = @_;
901
902    # If first_path is not null or empty, then add it back into the list
903    if (defined $first_path && $first_path =~ /\S/) {
904    unshift(@pathnames, $first_path);
905    }
906
907    my $join_char;
908    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
909    $join_char = ";";
910    } else {
911    $join_char = ":";
912    }
913
914    my $pathname = join($join_char, @pathnames);
915
916    # remove duplicate slashes
917    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
918    $pathname =~ s/[\\\/]+/\\/g;
919    } else {
920    $pathname =~ s/[\/]+/\//g;
921    # DB: want a pathname abc\de.html to remain like this
922    }
923
924    return $pathname;
925}
926
927
928sub tidy_up_oid {
929    my ($OID) = @_;
930    if ($OID =~ /\./) {
931    print STDERR "Warning, identifier $OID contains periods (.), removing them\n";
932    $OID =~ s/\.//g; #remove any periods
933    }
934    if ($OID =~ /^\s.*\s$/) {
935    print STDERR "Warning, identifier $OID starts or ends with whitespace. Removing it\n";
936    # remove starting and trailing whitespace
937    $OID =~ s/^\s+//;
938    $OID =~ s/\s+$//;
939    }
940    if ($OID =~ /^[\d]*$/) {
941    print STDERR "Warning, identifier $OID contains only digits. Prepending 'D'.\n";
942    $OID = "D" . $OID;
943    }       
944   
945    return $OID;
946}
947sub envvar_prepend {
948    my ($var,$val) = @_;
949
950    # do not prepend any value/path that's already in the environment variable
951   
952    my $escaped_val = &filename_to_regex($val); # escape any backslashes and brackets for upcoming regex
953    if (!defined($ENV{$var})) {
954    $ENV{$var} = "$val";
955    }
956    elsif($ENV{$var} !~ m/$escaped_val/) {
957    $ENV{$var} = "$val;".$ENV{$var};
958    }
959}
960
961sub envvar_append {
962    my ($var,$val) = @_;
963   
964    # do not append any value/path that's already in the environment variable
965   
966    my $escaped_val = &filename_to_regex($val); # escape any backslashes and brackets for upcoming regex
967    if (!defined($ENV{$var})) {
968    $ENV{$var} = "$val";
969    }
970    elsif($ENV{$var} !~ m/$escaped_val/) {
971    $ENV{$var} .= ";$val";
972    }
973}
974
975
976# splits a filename into a prefix and a tail extension using the tail_re, or
977# if that fails, splits on the file_extension . (dot)
978sub get_prefix_and_tail_by_regex {
979
980    my ($filename,$tail_re) = @_;
981   
982    my ($file_prefix,$file_ext) = ($filename =~ m/^(.*?)($tail_re)$/);
983    if ((!defined $file_prefix) || (!defined $file_ext)) {
984    ($file_prefix,$file_ext) = ($filename =~ m/^(.*)(\..*?)$/);
985    }
986
987    return ($file_prefix,$file_ext);
988}
989
990# get full path and file only path from a base_dir (which may be empty) and
991# file (which may contain directories)
992sub get_full_filenames {
993    my ($base_dir, $file) = @_;
994   
995    my $filename_full_path = $file;
996    # add on directory if present
997    $filename_full_path = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\S/;
998   
999    my $filename_no_path = $file;
1000
1001    # remove directory if present
1002    $filename_no_path =~ s/^.*[\/\\]//;
1003    return ($filename_full_path, $filename_no_path);
1004}
1005
1006# returns the path of a file without the filename -- ie. the directory the file is in
1007sub filename_head {
1008    my $filename = shift(@_);
1009
1010    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
1011    $filename =~ s/[^\\\\]*$//;
1012    }
1013    else {
1014    $filename =~ s/[^\\\/]*$//;
1015    }
1016
1017    return $filename;
1018}
1019
1020
1021
1022# returns 1 if filename1 and filename2 point to the same
1023# file or directory
1024sub filenames_equal {
1025    my ($filename1, $filename2) = @_;
1026
1027    # use filename_cat to clean up trailing slashes and
1028    # multiple slashes
1029    $filename1 = filename_cat ($filename1);
1030    $filename2 = filename_cat ($filename2);
1031
1032    # filenames not case sensitive on windows
1033    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
1034    $filename1 =~ tr/[A-Z]/[a-z]/;
1035    $filename2 =~ tr/[A-Z]/[a-z]/;
1036    }
1037    return 1 if $filename1 eq $filename2;
1038    return 0;
1039}
1040
1041# If filename is relative to within_dir, returns the relative path of filename to that directory
1042# with slashes in the filename returned as they were in the original (absolute) filename.
1043sub filename_within_directory
1044{
1045    my ($filename,$within_dir) = @_;
1046   
1047    if ($within_dir !~ m/[\/\\]$/) {
1048    my $dirsep = &util::get_dirsep();
1049    $within_dir .= $dirsep;
1050    }
1051   
1052    $within_dir = &filename_to_regex($within_dir); # escape DOS style file separator and brackets   
1053    if ($filename =~ m/^$within_dir(.*)$/) {
1054    $filename = $1;
1055    }
1056   
1057    return $filename;
1058}
1059
1060# If filename is relative to within_dir, returns the relative path of filename to that directory in URL format.
1061# Filename and within_dir can be any type of slashes, but will be compared as URLs (i.e. unix-style slashes).
1062# The subpath returned will also be a URL type filename.
1063sub filename_within_directory_url_format
1064{
1065    my ($filename,$within_dir) = @_;
1066   
1067    # convert parameters only to / slashes if Windows
1068   
1069    my $filename_urlformat = &filepath_to_url_format($filename);
1070    my $within_dir_urlformat = &filepath_to_url_format($within_dir);
1071
1072    #if ($within_dir_urlformat !~ m/\/$/) {
1073        # make sure directory ends with a slash
1074        #$within_dir_urlformat .= "/";
1075    #}
1076   
1077    my $within_dir_urlformat_re = &filename_to_regex($within_dir_urlformat); # escape any special RE characters, such as brackets
1078   
1079    #print STDERR "@@@@@ $filename_urlformat =~ $within_dir_urlformat_re\n";
1080   
1081    # dir prefix may or may not end with a slash (this is discarded when extracting the sub-filepath)
1082    if ($filename_urlformat =~ m/^$within_dir_urlformat_re(?:\/)*(.*)$/) {
1083        $filename_urlformat = $1;
1084    }
1085   
1086    return $filename_urlformat;
1087}
1088
1089# Convert parameter to use / slashes if Windows (if on Linux leave any \ as is,
1090# since on Linux it doesn't represent a file separator but an escape char).
1091sub filepath_to_url_format
1092{
1093    my ($filepath) = @_;
1094    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
1095        # Only need to worry about Windows, as Unix style directories already in url-format
1096        # Convert Windows style \ => /
1097        $filepath =~ s@\\@/@g;     
1098    }
1099    return $filepath;
1100}
1101
1102
1103sub filename_within_collection
1104{
1105    my ($filename) = @_;
1106
1107    my $collect_dir = $ENV{'GSDLCOLLECTDIR'};
1108   
1109    if (defined $collect_dir) {
1110
1111    # if from within GSDLCOLLECTDIR, then remove directory prefix
1112    # so source_filename is realative to it.  This is done to aid
1113    # portability, i.e. the collection can be moved to somewhere
1114    # else on the file system and the archives directory will still
1115    # work.  This is needed, for example in the applet version of
1116    # GLI where GSDLHOME/collect on the server will be different to
1117    # the collect directory of the remove user.  Of course,
1118    # GSDLCOLLECTDIR subsequently needs to be put back on to turn
1119    # it back into a full pathname.
1120
1121    $filename = filename_within_directory($filename,$collect_dir);
1122    }
1123   
1124    return $filename;
1125}
1126
1127sub prettyprint_file
1128{
1129    my ($base_dir,$file,$gli) = @_;
1130
1131    my $filename_full_path = &util::filename_cat($base_dir,$file);
1132
1133    if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
1134    require Win32;
1135
1136    # For some reason base_dir in the form c:/a/b/c
1137    # This leads to confusion later on, so turn it back into
1138    # the more usual Windows form
1139    $base_dir =~ s/\//\\/g;
1140    my $long_base_dir = Win32::GetLongPathName($base_dir);
1141    my $long_full_path = Win32::GetLongPathName($filename_full_path);
1142
1143    $file = filename_within_directory($long_full_path,$long_base_dir);
1144    $file = encode("utf8",$file) if ($gli);
1145    }
1146
1147    return $file;
1148}
1149
1150
1151sub upgrade_if_dos_filename
1152{
1153    my ($filename_full_path,$and_encode) = @_;
1154
1155    if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
1156    # Ensure any DOS-like filename, such as test~1.txt, has been upgraded
1157    # to its long (Windows) version
1158    my $long_filename = Win32::GetLongPathName($filename_full_path);
1159    if (defined $long_filename) {
1160        $filename_full_path = $long_filename;
1161    }
1162    # Make sure initial drive letter is lower-case (to fit in with rest of Greenstone)
1163    $filename_full_path =~ s/^(.):/\u$1:/;
1164    if ((defined $and_encode) && ($and_encode)) {
1165        $filename_full_path = encode("utf8",$filename_full_path);
1166    }
1167    }
1168
1169    return $filename_full_path;
1170}
1171
1172
1173sub downgrade_if_dos_filename
1174{
1175    my ($filename_full_path) = @_;
1176
1177    if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
1178    require Win32;
1179
1180    # Ensure the given long Windows filename is in a form that can
1181    # be opened by Perl => convert it to a short DOS-like filename
1182
1183    my $short_filename = Win32::GetShortPathName($filename_full_path);
1184    if (defined $short_filename) {
1185        $filename_full_path = $short_filename;
1186    }
1187    # Make sure initial drive letter is lower-case (to fit in
1188    # with rest of Greenstone)
1189    $filename_full_path =~ s/^(.):/\u$1:/;
1190    }
1191
1192    return $filename_full_path;
1193}
1194
1195sub block_filename
1196{
1197    my ($block_hash,$filename) = @_;
1198   
1199    if ($ENV{'GSDLOS'} =~ m/^windows$/) {
1200   
1201    # lower case the entire thing, eg for cover.jpg when its actually cover.JPG
1202    my $lower_filename = lc($filename);
1203    $block_hash->{'file_blocks'}->{$lower_filename} = 1;
1204#   my $lower_drive = $filename;
1205#   $lower_drive =~ s/^([A-Z]):/\l$1:/i;
1206   
1207#   my $upper_drive = $filename;
1208#   $upper_drive =~ s/^([A-Z]):/\u$1:/i;
1209#   
1210#   $block_hash->{'file_blocks'}->{$lower_drive} = 1;
1211#   $block_hash->{'file_blocks'}->{$upper_drive} = 1;       
1212    }
1213    else {
1214    $block_hash->{'file_blocks'}->{$filename} = 1;
1215    }
1216}
1217
1218
1219sub filename_is_absolute
1220{
1221    my ($filename) = @_;
1222
1223    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
1224    return ($filename =~ m/^(\w:)?\\/);
1225    }
1226    else {
1227    return ($filename =~ m/^\//);
1228    }
1229}
1230
1231
1232## @method make_absolute()
1233#
1234#  Ensure the given file path is absolute in respect to the given base path.
1235#
1236#  @param  $base_dir A string denoting the base path the given dir must be
1237#                    absolute to.
1238#  @param  $dir The directory to be made absolute as a string. Note that the
1239#               dir may already be absolute, in which case it will remain
1240#               unchanged.
1241#  @return The now absolute form of the directory as a string.
1242#
1243#  @author John Thompson, DL Consulting Ltd.
1244#  @copy 2006 DL Consulting Ltd.
1245#
1246#used in buildcol.pl, doesn't work for all cases --kjdon
1247sub make_absolute {
1248   
1249    my ($base_dir, $dir) = @_;
1250###    print STDERR "dir = $dir\n";
1251    $dir =~ s/[\\\/]+/\//g;
1252    $dir = $base_dir . "/$dir" unless ($dir =~ m|^(\w:)?/|);
1253    $dir =~ s|^/tmp_mnt||;
1254    1 while($dir =~ s|/[^/]*/\.\./|/|g);
1255    $dir =~ s|/[.][.]?/|/|g;
1256    $dir =~ tr|/|/|s;
1257###    print STDERR "dir = $dir\n";
1258   
1259    return $dir;
1260}
1261## make_absolute() ##
1262
1263sub get_dirsep {
1264
1265    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
1266    return "\\";
1267    } else {
1268    return "\/";
1269    }
1270}
1271
1272sub get_os_dirsep {
1273
1274    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
1275    return "\\\\";
1276    } else {
1277    return "\\\/";
1278    }
1279}
1280
1281sub get_re_dirsep {
1282
1283    return "\\\\|\\\/";
1284}
1285
1286
1287sub get_dirsep_tail {
1288    my ($filename) = @_;
1289   
1290    # returns last part of directory or filename
1291    # On unix e.g. a/b.d => b.d
1292    #              a/b/c => c
1293
1294    my $dirsep = get_re_dirsep();
1295    my @dirs = split (/$dirsep/, $filename);
1296    my $tail = pop @dirs;
1297
1298    # - caused problems under windows
1299    #my ($tail) = ($filename =~ m/^(?:.*?$dirsep)?(.*?)$/);
1300
1301    return $tail;
1302}
1303
1304
1305# if this is running on windows we want binaries to end in
1306# .exe, otherwise they don't have to end in any extension
1307sub get_os_exe {
1308    return ".exe" if $ENV{'GSDLOS'} =~ /^windows$/i;
1309    return "";
1310}
1311
1312
1313# test to see whether this is a big or little endian machine
1314sub is_little_endian
1315{
1316    # To determine the name of the operating system, the variable $^O is a cheap alternative to pulling it out of the Config module;
1317    # If it is a Macintosh machine (i.e. the Darwin operating system), regardless if it's running on the IBM power-pc cpu or the x86 Intel-based chip with a power-pc emulator running on top of it, it's big-endian
1318    # Otherwise, it's little endian
1319
1320    #return 0 if $^O =~ /^darwin$/i;
1321    #return 0 if $ENV{'GSDLOS'} =~ /^darwin$/i;
1322   
1323    # Going back to stating exactly whether the machine is little endian
1324    # or big endian, without any special case for Macs. Since for rata it comes
1325    # back with little endian and for shuttle with bigendian.
1326    return (ord(substr(pack("s",1), 0, 1)) == 1);
1327}
1328
1329
1330# will return the collection name if successful, "" otherwise
1331sub use_collection {
1332    my ($collection, $collectdir) = @_;
1333
1334    if (!defined $collectdir || $collectdir eq "") {
1335    $collectdir = &filename_cat ($ENV{'GSDLHOME'}, "collect");
1336    }
1337
1338    # get and check the collection
1339    if (!defined($collection) || $collection eq "") {
1340    if (defined $ENV{'GSDLCOLLECTION'}) {
1341        $collection = $ENV{'GSDLCOLLECTION'};
1342    } else {
1343        print STDOUT "No collection specified\n";
1344        return "";
1345    }
1346    }
1347   
1348    if ($collection eq "modelcol") {
1349    print STDOUT "You can't use modelcol.\n";
1350    return "";
1351    }
1352
1353    # make sure the environment variables GSDLCOLLECTION and GSDLCOLLECTDIR
1354    # are defined
1355    $ENV{'GSDLCOLLECTION'} = $collection;
1356    $ENV{'GSDLCOLLECTDIR'} = &filename_cat ($collectdir, $collection);
1357
1358    # make sure this collection exists
1359    if (!-e $ENV{'GSDLCOLLECTDIR'}) {
1360    print STDOUT "Invalid collection ($collection).\n";
1361    return "";
1362    }
1363
1364    # everything is ready to go
1365    return $collection;
1366}
1367
1368sub get_current_collection_name {
1369    return $ENV{'GSDLCOLLECTION'};
1370}
1371
1372
1373# will return the collection name if successful, "" otherwise. 
1374# Like use_collection (above) but for greenstone 3 (taking account of site level)
1375
1376sub use_site_collection {
1377    my ($site, $collection, $collectdir) = @_;
1378
1379    if (!defined $collectdir || $collectdir eq "") {
1380    die "GSDL3HOME not set.\n" unless defined $ENV{'GSDL3HOME'};
1381    $collectdir = &filename_cat ($ENV{'GSDL3HOME'}, "sites", $site, "collect");
1382    }
1383
1384    # collectdir explicitly set by this point (using $site variable if required).
1385    # Can call "old" gsdl2 use_collection now.
1386
1387    return use_collection($collection,$collectdir);
1388}
1389
1390
1391
1392sub locate_config_file
1393{
1394    my ($file) = @_;
1395
1396    my $locations = locate_config_files($file);
1397
1398    return shift @$locations; # returns undef if 'locations' is empty
1399}
1400
1401
1402sub locate_config_files
1403{
1404    my ($file) = @_;
1405
1406    my @locations = ();
1407
1408    if (-e $file) {
1409    # Clearly specified (most likely full filename)
1410    # No need to hunt in 'etc' directories, return value unchanged
1411    push(@locations,$file);
1412    }
1413    else {
1414    # Check for collection specific one before looking in global GSDL 'etc'
1415    if (defined $ENV{'GSDLCOLLECTDIR'} && $ENV{'GSDLCOLLECTDIR'} ne "") {
1416        my $test_collect_etc_filename
1417        = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"etc", $file);
1418       
1419        if (-e $test_collect_etc_filename) {
1420        push(@locations,$test_collect_etc_filename);
1421        }
1422    }
1423    my $test_main_etc_filename
1424        = &util::filename_cat($ENV{'GSDLHOME'},"etc", $file);
1425    if (-e $test_main_etc_filename) {
1426        push(@locations,$test_main_etc_filename);
1427    }
1428    }
1429
1430    return \@locations;
1431}
1432
1433
1434sub hyperlink_text
1435{
1436    my ($text) = @_;
1437   
1438    $text =~ s/(http:\/\/[^\s]+)/<a href=\"$1\">$1<\/a>/mg;
1439    $text =~ s/(^|\s+)(www\.(\w|\.)+)/<a href=\"http:\/\/$2\">$2<\/a>/mg;
1440
1441    return $text;
1442}
1443
1444
1445# A method to check if a directory is empty (note that an empty directory still has non-zero size!!!)
1446# Code is from http://episteme.arstechnica.com/eve/forums/a/tpc/f/6330927813/m/436007700831
1447sub is_dir_empty
1448{
1449    my ($path) = @_;
1450    opendir DIR, $path;
1451    while(my $entry = readdir DIR) {
1452        next if($entry =~ /^\.\.?$/);
1453        closedir DIR;
1454        return 0;
1455    }
1456    closedir DIR;
1457    return 1;
1458}
1459
1460# Returns the given filename converted using either URL encoding or base64
1461# encoding, as specified by $rename_method. If the given filename has no suffix
1462# (if it is just the tailname), then $no_suffix should be some defined value.
1463# rename_method can be url, none, base64
1464sub rename_file {
1465    my ($filename, $rename_method, $no_suffix)  = @_;
1466
1467    if(!$filename) { # undefined or empty string
1468    return $filename;
1469    }
1470
1471    if (!$rename_method) {
1472    print STDERR "WARNING: no file renaming method specified. Defaulting to using URL encoding...\n";
1473    # Debugging information
1474    # my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
1475    # print STDERR "Called from method: $cfilename:$cline $cpackage->$csubr\n";
1476    $rename_method = "url";
1477    } elsif($rename_method eq "none") {
1478    return $filename; # would have already been renamed
1479    }
1480
1481    # No longer replace spaces with underscores, since underscores mess with incremental rebuild
1482    ### Replace spaces with underscore. Do this first else it can go wrong below when getting tailname
1483    ###$filename =~ s/ /_/g;
1484
1485    my ($tailname,$dirname,$suffix);
1486    if($no_suffix) { # given a tailname, no suffix
1487    ($tailname,$dirname) = File::Basename::fileparse($filename);
1488    }
1489    else {
1490    ($tailname,$dirname,$suffix) = File::Basename::fileparse($filename, "\\.(?:[^\\.]+?)\$");
1491    }
1492    if (!$suffix) {
1493    $suffix = "";
1494    }
1495    else {
1496    $suffix = lc($suffix);
1497    }
1498
1499    if ($rename_method eq "url") {
1500    $tailname = &unicode::url_encode($tailname);
1501    }
1502    elsif ($rename_method eq "base64") {
1503    $tailname = &unicode::base64_encode($tailname);
1504    $tailname =~ s/\s*//sg;      # for some reason it adds spaces not just at end but also in middle
1505    }
1506
1507    $filename = "$tailname$suffix";
1508    $filename = "$dirname$filename" if ($dirname ne "./" && $dirname ne ".\\");
1509
1510    return $filename;
1511}
1512
1513
1514# BACKWARDS COMPATIBILITY: Just in case there are old .ldb/.bdb files
1515sub rename_ldb_or_bdb_file {
1516    my ($filename_no_ext) = @_;
1517
1518    my $new_filename = "$filename_no_ext.gdb";
1519    return if (-f $new_filename); # if the file has the right extension, don't need to do anything
1520    # try ldb
1521    my $old_filename = "$filename_no_ext.ldb";
1522   
1523    if (-f $old_filename) {
1524    print STDERR "Renaming $old_filename to $new_filename\n";
1525    rename ($old_filename, $new_filename)
1526        || print STDERR "Rename failed: $!\n";
1527    return;
1528    }
1529    # try bdb
1530    $old_filename = "$filename_no_ext.bdb";
1531    if (-f $old_filename) {
1532    print STDERR "Renaming $old_filename to $new_filename\n";   
1533    rename ($old_filename, $new_filename)
1534        || print STDERR "Rename failed: $!\n";
1535    return;
1536    }
1537}
1538
1539sub os_dir() {
1540   
1541    my $gsdlarch = "";
1542    if(defined $ENV{'GSDLARCH'}) {
1543    $gsdlarch = $ENV{'GSDLARCH'};
1544    }
1545    return $ENV{'GSDLOS'}.$gsdlarch;
1546}
1547
1548# Returns the greenstone URL prefix extracted from the appropriate GS2/GS3 config file.
1549# By default, /greenstone3 for GS3 or /greenstone for GS2.
1550sub get_greenstone_url_prefix() {
1551    # if already set on a previous occasion, just return that
1552    # (Don't want to keep repeating this: cost of re-opening and scanning files.)
1553    return $ENV{'GREENSTONE_URL_PREFIX'} if($ENV{'GREENSTONE_URL_PREFIX'});
1554
1555    my ($configfile, $urlprefix, $defaultUrlprefix);
1556    my @propertynames = ();
1557
1558    if($ENV{'GSDL3SRCHOME'}) {
1559    $defaultUrlprefix = "/greenstone3";
1560    $configfile = &util::filename_cat($ENV{'GSDL3SRCHOME'}, "packages", "tomcat", "conf", "Catalina", "localhost", "greenstone3.xml");
1561    push(@propertynames, qw/path\s*\=/);
1562    } else {
1563    $defaultUrlprefix = "/greenstone";
1564    $configfile = &util::filename_cat($ENV{'GSDLHOME'}, "cgi-bin", &os_dir(), "gsdlsite.cfg");
1565    push(@propertynames, (qw/\nhttpprefix/, qw/\ngwcgi/)); # inspect one property then the other
1566    }
1567
1568    $urlprefix = &extract_propvalue_from_file($configfile, \@propertynames);
1569
1570    if(!$urlprefix) { # no values found for URL prefix, use default values
1571    $urlprefix = $defaultUrlprefix;
1572    } else {
1573    #gwcgi can contain more than the wanted prefix, we split on / to get the first "directory" level
1574    $urlprefix =~ s/^\///; # remove the starting slash
1575    my @dirs = split(/(\\|\/)/, $urlprefix);
1576    $urlprefix = shift(@dirs);
1577
1578    if($urlprefix !~ m/^\//) { # in all cases: ensure the required forward slash is at the front
1579        $urlprefix = "/$urlprefix";
1580    }
1581    }
1582
1583    # set for the future
1584    $ENV{'GREENSTONE_URL_PREFIX'} = $urlprefix;
1585#    print STDERR "*** in get_greenstone_url_prefix(): $urlprefix\n\n";
1586    return $urlprefix;
1587}
1588
1589
1590# Given a config file (xml or java properties file) and a list/array of regular expressions
1591# that represent property names to match on, this function will return the value for the 1st
1592# matching property name. If the return value is undefined, no matching property was found.
1593sub extract_propvalue_from_file() {
1594    my ($configfile, $propertynames) = @_;
1595
1596    my $value;
1597    unless(open(FIN, "<$configfile")) {
1598    print STDERR "extract_propvalue_from_file(): Unable to open $configfile. $!\n";
1599    return $value; # not initialised
1600    }
1601
1602    # Read the entire file at once, as one single line, then close it
1603    my $filecontents;
1604    {
1605    local $/ = undef;       
1606    $filecontents = <FIN>;
1607    }
1608    close(FIN);
1609
1610    foreach my $regex (@$propertynames) {
1611        ($value) = $filecontents=~ m/$regex\s*(\S*)/s; # read value of the property given by regex up to the 1st space
1612    if($value) {
1613            $value =~ s/^\"//;     # remove any startquotes
1614        $value =~ s/\".*$//;   # remove the 1st endquotes (if any) followed by any xml
1615        last;              # found value for a matching property, break from loop
1616    }
1617    }
1618
1619    return $value;
1620}
1621
1622# Subroutine that sources setup.bash, given GSDLHOME and GSDLOS and
1623# given that perllib is in @INC in order to invoke this subroutine.
1624# Call as follows -- after setting up INC to include perllib and
1625# after setting up GSDLHOME and GSDLOS:
1626#
1627# require util;
1628# &util::setup_greenstone_env($ENV{'GSDLHOME'}, $ENV{'GSDLOS'});
1629#
1630sub setup_greenstone_env() {
1631    my ($GSDLHOME, $GSDLOS) = @_;
1632
1633    #my %env_map = ();
1634    # Get the localised ENV settings of running a localised source setup.bash
1635    # and put it into the ENV here. Need to clear GSDLHOME before running setup
1636    #my $perl_command = "(cd $GSDLHOME; export GSDLHOME=; . ./setup.bash > /dev/null; env)";
1637    my $perl_command = "(cd $GSDLHOME; /bin/bash -c \"export GSDLHOME=; source setup.bash > /dev/null; env\")";     
1638    if($GSDLOS =~ m/windows/i) {
1639        #$perl_command = "cmd /C \"cd $GSDLHOME&& set GSDLHOME=&& setup.bat > nul&& set\"";
1640        $perl_command = "(cd $GSDLHOME&& set GSDLHOME=&& setup.bat > nul&& set)";
1641    }
1642    if (!open(PIN, "$perl_command |")) {
1643        print STDERR ("Unable to execute command: $perl_command. $!\n");
1644    }
1645
1646    while (defined (my $perl_output_line = <PIN>)) {
1647        my($key,$value) = ($perl_output_line =~ m/^([^=]*)[=](.*)$/);
1648        #$env_map{$key}=$value;     
1649        $ENV{$key}=$value;
1650    }
1651    close (PIN);
1652
1653    # If any keys in $ENV don't occur in Greenstone's localised env
1654    # (stored in $env_map), delete those entries from $ENV
1655    #foreach $key (keys %ENV) {
1656    #   if(!defined $env_map{$key}) {
1657    #       print STDOUT "**** DELETING ENV KEY: $key\tVALUE: $ENV{'$key'}\n";
1658    #       delete $ENV{$key}; # del $ENV(key, value) pair
1659    #   }
1660    #}
1661    #undef %env_map;
1662}
1663
1664sub get_perl_exec() {   
1665    my $perl_exec = $^X; # may return just "perl"
1666   
1667    if($ENV{'PERLPATH'}) {
1668        # OR: # $perl_exec = &util::filename_cat($ENV{'PERLPATH'},"perl");
1669        if($ENV{'GSDLOS'} =~ m/windows/) {
1670            $perl_exec = "$ENV{'PERLPATH'}\\Perl.exe";
1671        } else {
1672            $perl_exec = "$ENV{'PERLPATH'}/perl";
1673        }
1674    } else { # no PERLPATH, use Config{perlpath} else $^X: special variables
1675        # containing the full path to the current perl executable we're using
1676        $perl_exec = $Config{perlpath}; # configured path for perl
1677        if (!-e $perl_exec) { # may not point to location on this machine
1678            $perl_exec = $^X; # may return just "perl"
1679            if($perl_exec =~ m/^perl/i) { # warn if just perl or Perl.exe
1680                print STDERR "**** WARNING: Perl exec found contains no path: $perl_exec";             
1681            }
1682        }
1683    }
1684   
1685    return $perl_exec;
1686}
1687
1688
16891;
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