File: xindy.in

package info (click to toggle)
xindy 2.5.1.20160104-8
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 3,304 kB
  • sloc: perl: 15,840; lisp: 4,845; makefile: 1,548; lex: 541; sh: 165; sed: 97
file content (992 lines) | stat: -rw-r--r-- 30,345 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
#!/usr/bin/env perl
# $Id: xindy.pl,v 1.18 2011/01/18 22:18:29 jschrod Exp $
#------------------------------------------------------------
# (history at end)

=head1 NAME

xindy - create sorted and tagged index from raw index

=head1 SYNOPSIS

 xindy [-V?h] [-qv] [-d magic] [-o outfile.ind] [-t log] \
       [-L lang] [-C codepage] [-M module] [-I input] \
       [--interactive] [--mem-file=xindy.mem] \
       [idx0 idx1 ...]

=head2 GNU-Style Long Options for Short Options:

 -V / --version
 -? / -h / --help
 -q / --quiet
 -v / --verbose
 -d / --debug          (multiple times)
 -o / --out-file
 -t / --log-file
 -L / --language
 -C / --codepage
 -M / --module         (multiple times)
 -I / --input-markup   (supported: latex, xelatex, omega, xindy)


=head1 DESCRIPTION

B<xindy> is the formatter-indepedent command of xindy, the flexible
indexing system. It takes a raw index as input, and produces a merged,
sorted and tagged index. Merging, sorting, and tagging is controlled
by xindy style files.

Files with the raw index are passed as arguments. If no arguments are
passed, the raw index will be read from standard input.

B<xindy> is completely described in its manual that you will find on
its Web Site, http://www.xindy.org/. A good introductionary
description appears in the indexing chapter of the LaTeX Companion (2nd ed.)

If you want to produce an index for LaTeX documents, the command
texindy(1) is probably more of interest for you. It is a wrapper for
B<xindy> that turns on many LaTeX conventions by default.


=head1 OPTIONS

=over

=item C<--version> / B<-V>

output version numbers of all relevant components and exit.

=item C<--help> / B<-h> / B<-?>

output usage message with options explanation.

=item C<--quiet> / B<-q>

Don't output progress messages. Output only error messages.

=item C<--verbose> / B<-v>

Output verbose progress messages.

=item C<--debug> I<magic> / B<-d> I<magic>

Output debug messages, this option may be specified multiple times.
I<magic> determines what is output:

 magic          remark
 ------------------------------------------------------------
 script         internal progress messages of driver scripts
 keep_tmpfiles  don't discard temporary files
 markup         output markup trace, as explained in xindy manual
 level=n        log level, n is 0 (default), 1, 2, or 3

=item C<--out-file> F<outfile.ind> / B<-o> F<outfile.ind>

Output index to file F<outfile.ind>. If this option is not passed, the
name of the output file is the base name of the first argument and the
file extension F<ind>. If the raw index is read from standard input,
this option is mandatory.

=item C<--log-file> F<log.ilg> / B<-t> F<log.ilg>

Output log messages to file F<log.ilg>. These log messages are
independent from the progress messages that you can influence with
C<--debug> or C<--verbose>.

=item C<--language> I<lang> / B<-L> I<lang>

The index is sorted according to the rules of language I<lang>. These
rules are encoded in a xindy module created by I<make-rules>.

If no input encoding is specified via C<--codepage> or enforced by
input markup, a xindy module for that language is searched with a
latin, a cp, an iso, ascii, or utf8 encoding, in that order.

Language modules are either placed in the F<lang> or in the
F<contrib/lang> sub-directory of the modules base directory.

=item C<--codepage> I<enc> / B<-C> I<enc>

The raw input is in input encoding I<enc>. This information is used to
select the correct xindy sort module and output encoding of letter
group headings.

When C<xelatex> or C<omega> input markup is used, C<utf8> is always
used as codepage, then this option is ignored.

If raw input is in LICR, texindy(1) should be used instead of
xindy(1). It will activate a mapping of I<inputenc> encoding for
C<latex> input markup to the chosen raw input codepage.

=item C<--module> I<module> / B<-M> I<module>

Load the xindy module F<module.xdy>. This option may be specified
multiple times. The modules are searched in the xindy search path that
can be changed with the environment variable C<XINDY_SEARCHPATH>.

=item C<--input-markup> I<input> / B<-I> I<input>

Specifies the input markup of the raw index. Supported values for
I<input> are C<latex>, C<xelatex>, C<omega>, and C<xindy>.

C<latex> and C<xelatex> input markup is the one that is emitted by
default from the LaTeX kernel, or by the C<index> macro package of
David Jones. ^^-notation of single byte characters is supported.
Remapping of LICR-encoded characters is not done; use texindy(1) for
that. Use input markup C<latex> if you use standard LaTeX or pdfLaTeX
and use input markup C<xelatex> if you use XeLaTeX or LuaLaTeX.

C<omega> input markup is like C<latex> input markup, but with Omega's
^^-notation as encoding for non-ASCII characters.

C<xindy> input markup is specified in the xindy manual.

=item C<--interactive>

Start xindy in interactive mode. You will be in a xindy read-eval-loop
where xindy language expressions are read and evaluated interactively.

=item C<--mem-file> I<xindy.mem>

This option is only usable for developers or in very rare situations.
The compiled xindy kernel is stored in a so-called I<memory file>,
canonically named F<xindy.mem>, and located in the xindy library
directory. This option allows to use another xindy kernel.

=back


=head1 SUPPORTED LANGUAGES / CODEPAGES

The following languages are supported:

=head2 Latin scripts

 albanian      gypsy             portuguese
 croatian      hausa		 romanian
 czech	       hungarian 	 russian-iso
 danish	       icelandic	 slovak-small
 english       italian		 slovak-large
 esperanto     kurdish-bedirxan  slovenian
 estonian      kurdish-turkish	 spanish-modern
 finnish       latin		 spanish-traditional
 french	       latvian		 swedish
 general       lithuanian	 turkish
 german-din    lower-sorbian	 upper-sorbian
 german-duden  norwegian	 vietnamese
 greek-iso     polish

German recognizes two different sorting schemes to handle umlauts:
normally, C<�> is sorted like C<ae>, but in phone books or
dictionaries, it is sorted like C<a>. The first scheme is known as
I<DIN order>, the second as I<Duden order>.

C<*-iso> language names assume that the raw index entries are in ISO
8859-9 encoding.

C<gypsy> is a northern Russian dialect.

=head2 Cyrillic scripts

 belarusian    mongolian  	 serbian
 bulgarian     russian    	 ukrainian
 macedonian

=head2 Other scripts

 greek         klingon

=head2 Available Codepages

This is not yet written. You can look them up in your xindy
distribution, in the F<modules/lang/language/> directory (where
I<language> is your language). They are named
F<variant-codepage-lang.xdy>, where F<variant-> is most often empty
(for german, it's C<din5007> and C<duden>; for spanish, it's C<modern>
and C<traditional>, etc.)

 < Describe available codepages for each language >

 < Describe relevance of codepages (as internal representation) for
   LaTeX inputenc >



=head1 ENVIRONMENT

=over

=item C<XINDY_SEARCHPATH>

A list of directories where the xindy modules are searched in. No
subtree searching is done (as in TDS-conformant TeX).

If this environment variable is not set, the default is used:
C<.:>I<modules_dir>C<:>I<modules_dir>C</base>. I<modules_dir> is
determined at run time, relative to the B<xindy> command location:
Either it's F<../modules>, that's the case for F<opt>-installations.
Or it's F<../lib/xindy/modules>, that's the case for
F<usr>-installations.

=item C<XINDY_LIBDIR>

Library directory where F<xindy.mem> is located.

The modules directory may be a subdirectory, too.

=back


=head1 COMPATIBILITY TO MAKEINDEX

B<xindy> does not claim to be completely compatible with MakeIndex,
that would prevent some of its enhancements. That said, we strive to
deliver as much compatibility as possible. The most important
incompatibilities are

=over

=item *

For raw index entries in LaTeX syntax, C<\index{aaa|bbb}> is
interpreted differently. For MakeIndex C<bbb> is markup that is output
as a LaTeX tag for this page number. For B<xindy>, this is a location
attribute, an abstract identifier that will be later associated with
markup that should be output for that attribute.

For straight-forward usage, when C<bbb> is C<textbf> or similar, we
supply location attribute definitions that mimic MakeIndex's
behaviour.

For more complex usage, when C<bbb> is not an identifier, no such
compatibility definitions exist and may also not been created with
current B<xindy>. In particular, this means that by default the LaTeX
package C<hyperref> will create raw index files that cannot be
processed with B<xindy>. This is not a bug, this is the unfortunate
result of an intented incompatibility. It is currently not possible to
get both hyperref's index links and use B<xindy>.

A similar situation is reported to exist for the C<memoir> LaTeX
class.

Programmers who know Common Lisp and Lex and want to work on a remedy
should please contact the author.

=item *

If you have an index rage and a location attribute, e.g.,
C<\index{key\(attr}> starts the range, one needs (1) to specify that
attribute in the range closing entry as well (i.e., as
C<\index{key\)attr}>) and (2) one needs to declare the index attribute
in an B<xindy> style file.

MakeIndex will output the markup C<\attr{page1--page2}> for such a
construct. This is not possible to achieve in B<xindy>, output will be
C<\attrMarkup{page1}--\attrMarkup{page2}>. (This is actually
considered a bug, but not a high priority one.)

The difference between MakeIndex page number tags and B<xindy>
location attributes was already explained in the previous item.

=item *

The MakeIndex compatibility definitions support only the default raw
index syntax and markup definition. It is not possible to configure
raw index parsing or use a MakeIndex style file to describe output
markup.

=back


=head1 KNOWN ISSUES

Option B<-q> also prevents output of error messages. Error messages
should be output on stderr, progress messages on stdout.

There should be a way to output the final index to stdout. This would
imply B<-q>, of course.

LaTeX raw index parsing should be configurable.

Codepage C<utf8> should be supported for all languages, and should be
used as internal codepage for LaTeX inputenc re-encoding.


=head1 SEE ALSO

texindy(1),
tex2xindy(1)


=head1 AUTHOR

Joachim Schrod


=head1 LEGALESE

Copyright (c) 2004-2014 by Joachim Schrod.

B<xindy> is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

=for Emacs
# '

=cut


use strict;
use English qw(-no_match_vars);

our $VERSION = sprintf "%d.%02d", q$Revision: 1.18 $ =~ /: (\d+)\.(\d+)/ ;


# Used modules.

use Cwd;
use File::Basename;
use File::Glob qw(bsd_glob);
use File::Spec;
use File::Temp qw(tempfile tmpnam);
use Getopt::Long qw(:config bundling);
use POSIX qw(uname);


# Determine environment. Where is our library directory, and our modules?

our $is_TL = ( '@is_TL@' eq 'yes' );
our $is_w32 = ( $OSNAME =~ /^MSWin/i ) ;
our $path_sep = ( $is_w32 ? ';' : ':' ) ;
our $is_windows = ( $is_w32 || $OSNAME eq 'cygwin' ) ;
our $clisp = ( $is_windows ? 'clisp.exe' : 'clisp' ) ;
our $real_cmd = Cwd::realpath($0);
our $cmd_dir = dirname($real_cmd);
our $cmd = basename($0);

our ($lib_dir, $modules_dir);

# xindy-lisp.exe for Windows seems to be unable to interpret the short-name
# format which is a default for the variables TEMP and TMP in Windows OS.
# As a workaround, we create temporary files in the current directory
# in xindy on Windows.

if ( $is_w32 ) {
use Env qw(TMPDIR);
Env::import();
$TMPDIR = ".";
}

# We have different installation structures for TeX-Live and a
# standalone installation. In TeX-Live, the user command is a symlink
# in some bin directory, and the actual script is in the library
# directory where both memory image and modules live as well.
# Standalone installations come in /usr or /opt variants, memory
# images are located in a lib directory, modules are located in a
# share directory.
#
# FIXME: In standalone installations, modules are still placed in lib
# directory. This is not conformant to FHS.

if ( $is_TL ) { # TeX Live, MiKTeX, or W32TeX

    $modules_dir = Cwd::realpath("$cmd_dir/../../xindy/modules");
    die "$cmd: Cannot locate xindy modules directory"  unless -d $modules_dir;

    if ( $is_w32 ) {
       if ( -d "$cmd_dir/../../../bin/win32" ) {	# TeX Live
	   $cmd_dir = "$cmd_dir/../../../bin/win32";
       } elsif ( -d "$cmd_dir/../../miktex/bin/x64/internal" ) {	# MiKTeX 64-bit
	   $cmd_dir = "$cmd_dir/../../miktex/bin/x64/internal";
       } elsif ( -d "$cmd_dir/../../miktex/bin/internal" ) {	# MiKTeX 32-bit
	   $cmd_dir = "$cmd_dir/../../miktex/bin/internal";
       } elsif ( -d "$cmd_dir/../../../../bin" ) {	# W32TeX
	   $cmd_dir = "$cmd_dir/../../../../bin";
       } else {
	   die "$cmd: Cannot locate bin directory";
       }
    } else {
	die "$cmd: not a symlink as required for TeX Live"  unless -l $0;
	# Follow symlinks and determine $cmd_dir such that
	# $cmd_dir/xindy -> $r0 = XINDY_SCRIPTDIR/xindy.pl
	# I.e., it determines the directory with the last symbolic link; the
	# one that points to a real file. That's the directory with the binary
	# files (Lisp executable and memory file).
	$real_cmd = $0;
	while (-l $real_cmd) {
	    $cmd_dir = dirname($real_cmd);
	    $real_cmd = readlink($real_cmd);
	    # \ directory separator may happen on Cygwin.
	    $real_cmd = "$cmd_dir/$real_cmd"  unless $real_cmd =~ m,^[\\/],; # relative link
	}
    }

    # library directory
    $lib_dir = $cmd_dir;

    # clisp runtime
    my $xindy_run = ( $is_windows ?
		      "$lib_dir/xindy-lisp.exe" : "$lib_dir/xindy.run" );
    $clisp = $xindy_run  if -e $xindy_run;

} else { # standalone installation

    # library directory
    if ( $ENV{XINDY_LIBDIR} ) {
	$lib_dir = $ENV{XINDY_LIBDIR};
    } elsif ( '@libdir@' ne '@libdir' . '@' ) { # GNU configure at work?
	if ( -d '@libdir@/xindy' ) {	# /usr style
	    $lib_dir = '@libdir@/xindy';
	} else {
	    $lib_dir = '@libdir@'; # /opt style
	}
    } elsif ( -f "$cmd_dir/../lib/xindy.mem" ) { # /opt style
	$lib_dir = "$cmd_dir/../lib";
    } elsif ( -d "$cmd_dir/../lib/xindy" ) { # /usr style
	$lib_dir = "$cmd_dir/../lib/xindy";
    } else {
	die "$cmd: Cannot locate xindy library directory";
    }

    # modules directory
    $modules_dir = "/usr/share/xindy";
    unless ( -d $modules_dir ) {
    #if ( -d "$cmd_dir/../modules" ) {	# /opt style
    #	$modules_dir = "$cmd_dir/../modules";
    #} elsif ( -d "$lib_dir/modules" ) {	# /usr style
    #	$modules_dir = "$lib_dir/modules";
    #} else {
	die "$cmd: Cannot locate xindy modules directory";
    }

} # determine environment


# Check arguments, store them in proper variables.

sub usage ( ;$ )
{
    my $signal_error = int shift;
    my $output_handle = $signal_error ? *STDERR{IO} : *STDOUT{IO};
    print $output_handle <<_EOT_

usage: $cmd [-V?h] [-qv] [-d magic] [-o outfile.ind] [-t log] \\
            [-L lang] [-C codepage] [-M module] [-I input] \\
            [--interactive] [--mem-file xindy.mem] \\
	    [idx0 idx1 ...]

GNU-STYLE LONG OPTIONS FOR SHORT OPTIONS:

 -V / --version
 -? / -h / --help
 -q / --quiet
 -v / --verbose
 -d / --debug          (multiple times)
                       (supported: script, keep_tmpfiles, markup, level=n)
 -o / --out-file
 -t / --log-file
 -L / --language
 -C / --codepage
 -M / --module         (multiple times)
 -I / --input-markup   (supported: latex, xelatex, omega, xindy)

_EOT_
  ;
    exit ($signal_error ? 1 : 0);
}

our ($quiet, $verbose, %debug,
     $outfile, $logfile, $language, @codepages, @modules, $input_markup,
     $interactive, $mem_file);
$input_markup = 'latex';
$mem_file = "$lib_dir/xindy.mem";

my @orig_argv = @ARGV;
parse_options();


# Support universal binary on Mac OS X.

if ( $OSNAME eq 'darwin'  &&  ! -e $mem_file ) {
    my @uname = POSIX::uname();
    if ( $uname[4] eq 'Power Macintosh' ) {
	$mem_file = "$lib_dir/xindy-ppc.mem";
    } else {
	$mem_file = "$lib_dir/xindy-i386.mem";
    }
}
die "$cmd: Cannot locate $mem_file"  unless -e $mem_file;


# This script creates temporary files. Whenever a file is created, its
# name is added to @temp_files. In an END handler, the temporary files
# are deleted. Signal handlers are set up to get proper program
# termination on user-induced signals.

our @temp_files = ();
handle_signals();
END {
    unlink (@temp_files)  if ( @temp_files  &&  ! $debug{keep_tmpfiles} );
}


# Raw index handling: xindy is not able (yet?) to handle arguments
# Perl-style, so we do it instead. We gather the raw index in a
# temporary file. We also process it by the filter program it if
# wanted. Signal handlers will discard temporary files if necessary.

our $raw_index = File::Spec->devnull;
unless ( $interactive ) {
    for my $f ( @ARGV ) {
	die "$cmd: input file $f does not exist"  unless -f $f;
    }
    $raw_index = create_raw_index();	# processes @ARGV
    my $filter_cmd = '';
    if ( $input_markup =~ /latex$/ ) {
	$filter_cmd = "$cmd_dir/tex2xindy";
    } elsif ( $input_markup eq 'omega' ) {
	$filter_cmd = "$cmd_dir/tex2xindy -o";
    }
    $raw_index = filter_index ($filter_cmd, $raw_index)
      if $filter_cmd;
}


# Execution: Create xindy start expression and call it.

my $xindy_expression = xindy_expression(); # accesses global option vars
my $exit_code = call_xindy ($mem_file, $xindy_expression);


# Finished: exit, clean up in END handler.

exit ($exit_code);


# ------------------------------------------------------------


sub parse_options() {

    my (@debug);
    GetOptions(
		'version|V'          => sub { output_version(0); },
		'internal-version'   => sub { output_version(1); },
		'help|h|?'           => \&usage,
		'quiet|q'            => \$quiet,
		'verbose|v'          => \$verbose,
		'debug|d=s'          => \@debug,
		'out-file|o=s'       => \$outfile,
		'log-file|t=s'       => \$logfile,
		'language|L=s'       => \$language,
		'codepage|C=s'       => \@codepages,
		'module|M=s'         => \@modules,
		'input-markup|I=s'   => \$input_markup,
		'interactive'        => \$interactive,
		'mem-file=s'         => \$mem_file,
	      )
      or  usage(1);

    # Debug option values are easier to test in a hash. Clean up trace
    # level options, too.
    %debug = map { $_ => 1 } @debug;
    my @trace_level = grep /^level=/, @debug;
    if ( @trace_level > 1 ) {
	print STDERR "You can only specify one trace level.\n\n";
	exit (1);
    }
    delete $debug{$trace_level[0]};
    $trace_level[0] =~ s/^level=// ;
    $debug{trace_level} = $trace_level[0];

    # Check for unsupported debug option values.
    my %debug_check = %debug;
    foreach my $magic ( qw(script keep_tmpfiles markup trace_level) ) {
	delete $debug_check{$magic};
    }
    if ( %debug_check ) {
	my @magic = keys(%debug_check);
	print STDERR "Unsupported argument for --debug: @magic\n";
	usage(1);
    }

    # Script debugging implies running it verbose and not quiet.
    if ( $debug{script} ) {
	$verbose = 1;
	$quiet = 0;
    }

    # Default for the output file: first argument, with extension replaced
    # by ".ind".
    unless ( $outfile  ||  $interactive ) {
	if ( @ARGV == 0 ) {
	    print STDERR
"You need to specify --out-file if the raw index is read from standard input.\n";
	    usage(1);
	}
	my ($name, $path, $suffix) = fileparse ($ARGV[0], '\.[^\.]+');
        if ($path eq ".\\") {
	   $outfile = "$name.ind";
        } else {
	$outfile = "$path$name.ind";
        }
    }

    # FIXME: xindy wants a log file. Really?
    $logfile = File::Spec->devnull  unless $logfile;

    # Modules fixup: If they have no .xdy suffix, they get one.
    @modules = map { /\.xdy$/ ? $_ : "$_.xdy" } @modules;

    # Check that the input markup is known.
    # omega markup implies codepage utf8.
    if ( $input_markup  &&
	 $input_markup ne 'latex'  &&  $input_markup ne 'xelatex'  &&
	 $input_markup ne 'omega'  &&  $input_markup ne 'xindy' ) {
	print STDERR "Unsupported input markup $input_markup.\n";
	usage(1);
    }
    if ( $input_markup eq 'xelatex'  ||  $input_markup eq 'omega' ) {
	@codepages = qw(utf8);
    }

}



#
# SIGNAL HANDLING
#
# FIXME: This is not good enough. We also need to kill subprocesses,
# i.e., filter or xindy, if they are running.

# Our signal handler function just exits. Temporary files are deleted
# by the END section above. Actually, the exit code looses the
# information about the received signal, that's not good but shouldn't
# hurt either...

sub signal_exit() {
    exit (2);
}

sub handle_signals () {
    $SIG{'HUP'}  = \&signal_exit; # 1
    $SIG{'INT'}  = \&signal_exit; # 2
    $SIG{'QUIT'} = \&signal_exit; # 3
    $SIG{'TERM'} = \&signal_exit; # 15
}



#
# CREATION OF RAW XINDY INDEX
#

# Handle input files Perl-style. Returns file name that contains
# concatenated input file contents.

sub create_raw_index () {
    my ($output, $outfile) = tempfile();
    push (@temp_files, $outfile);
    $outfile=quotify($outfile);
    while ( <> ) {
	print $output $_;
    }
    close ($output);
    print "concatenated xindy input file: $outfile\n"  if $debug{script};
    return $outfile;
}


# Run a filter over raw index. Returns file name with filtered raw
# index, supposed to be in xindy input format.
#
# We assume the file names to be safe from shell meta characters since
# they were computed by File::Temp.

sub filter_index ( $$ ) {
    my ($filter, $input) = @_;
    my $output = tmpnam();
    push (@temp_files, $output);
    $output=quotify($output);
    $filter=quotify($filter);
    print "Running filter: $filter <$input >$output\n"  if $verbose;
    system "$filter <$input >$output";
    print "filtered xindy input file: $output\n"  if $debug{script};
    return $output;
}



#
# XINDY EXECUTION
#

# Construct final xindy expression, from options.

sub xindy_expression () {
    my ($logging, $tracing, $trace_level, $searchpath);

    # Determine language module of make-rules framework. Part of the
    # complexity below is from compatibility with the TLC2
    # description. We need to support the language names listed there,
    # even though they are not current. In addition, the codepage
    # option was introduced later and we need to guess it. This
    # guesswork will often be wrong, sadly.
    #
    # FIXME: I didn't see all languages. What's on with gypsy and
    # hausa?
    if ( !$language ) {
        $language = "general";
    }
    if ( $language ) {
	# If there is no language directory, this might be a variant.
	# Language names and variants are separated by hyphens. The
	# variant name "din" is an abbreviation for "din5007". The
	# variant name "iso" is ignored, that is actually a codepage
	# name.
	#
	# FIXME: Or is "iso" the variant "translit"?!
	my @lang_base_dirs = ("$modules_dir/contrib/lang", "$modules_dir/lang");
	my ($lang_dir, $variant);
	foreach my $ld ( @lang_base_dirs ) {
	    if ( -d "$ld/$language" ) {
		$lang_dir = "$ld/$language";
		last;
	    } else {
		$language =~ /^([^-]*)-(.*)/ ; # language name ends with 1st hyphen
		if ( $2 && -d "$ld/$1" ) { # $2 is not set if the regex didn't match
		    $language = $1;
		    $lang_dir = "$ld/$language";
		    $variant = "$2-"  unless ( $2 eq 'iso' );
		    $variant eq 'din-'  and  $variant = 'din5007-';
		    last;
		}
	    }
	}
	# Let's guess the codepage. We take any that starts with
	# "latin", "cp", "iso8859", "ascii", or "utf8".
	@codepages = qw(latin cp iso8859 ascii utf8)  unless @codepages;
	my @styles;
	foreach my $cp ( @codepages ) {
	    @styles = bsd_glob("$lang_dir/$variant$cp*-lang.xdy");
	    last  if @styles;
	}
	unless ( @styles ) {
	    print STDERR "Cannot locate xindy module for language $language";
	    print STDERR " in codepage $codepages[0]"  if ( @codepages == 1 );
	    print STDERR ".\n";
	    exit (1);
	}
	# Extract language module name: It's the relative part after
	# the module directory. Put it at the front of the list of
	# needed modules. It's important that the language module is
	# loaded first, it defines the sort rulesets, and subsequent
	# modules shall be able to add sort rules.
	unshift (@modules, substr($styles[0], length("$modules_dir/")));
	print "Found language module $styles[0]\n"  if $debug{script};
    }

    # If there is more than one xindy module, construct a style file.
    # This is bad, of course; xindy should handle a list of style
    # files itself.
    my $style_file = $modules[0];	# will be undef if @modules is not set
    if ( @modules > 1 ) {
	my $sf;
	($sf, $style_file) = tempfile();
	push (@temp_files, $style_file);
	$style_file=quotify($style_file);
	foreach my $module ( @modules ) {
	    my $fnmodule=`kpsewhich -progname=xindy -format=othertext $module`;
	    if ($fnmodule) {
		chomp($fnmodule);
		print $sf "(require \"$fnmodule\")\n";
	    } else {
		print $sf "(require \"$module\")\n";
	    }
	}
	close ($sf);
    }

    $outfile = quotify($outfile);
    $logging = ':logfile ' . quotify($logfile)  if $logfile;
    $tracing = ':markup-trace :on'  if $debug{markup};
    $trace_level = ":trace-level $debug{trace_level}"  if $debug{trace_level};
    $searchpath = quotify(join($path_sep, ".", $modules_dir, "$modules_dir/base"));

    my $exp = <<_EOT_
(progn
  (searchpath $searchpath)
  (xindy:startup
    :idxstyle $style_file
    :rawindex $raw_index
    :output $outfile
    $logging
    $tracing
    $trace_level)
  (exit))
_EOT_
  ;

    return $exp;
}


# Actual xindy call. Returns exit code.

sub call_xindy ( $$ ) {
    my ($mem_file, $xindy_exp) = @_;

    my @command = ($clisp, '-M', $mem_file, '-E', 'iso-8859-1');
    if ( $interactive ) {
	print "Proposed xindy expression:\n\n$xindy_exp\n"  unless $quiet;
    } elsif ($is_w32) {
	my ($output, $outfile) = tempfile();
	push (@temp_files, $outfile);
	$outfile=quotify($outfile);
	print $output $xindy_exp;
	close ($output);
	print "xindy startup file: $outfile\n" if $debug{script};
	push (@command, "$outfile");
    } else {
	push (@command, '-x', $xindy_exp);
    }

    if ( $debug{script} ) {
	print "modules directory: $modules_dir.\n";
	print "command: @command\n";
    }

    if ( $quiet && ! $interactive ) {
	open (STDOUT, '>', File::Spec->devnull);
    }
    system @command;
    if ( $? == -1 ) {
	print STDERR "$cmd: Could not execute xindy kernel: $!\n";
    } elsif ( $? & 127 ) {
	return 4;
    } else {
	return $? >> 8;
    }
}

sub output_version ( ;$ ) {		# optional arg: internal-version flag
    my $internal = shift;
    output_xindy_release()  unless $internal;
    print "$cmd script version: $VERSION\n";
    my $exit_code = call_xindy($mem_file, '(xindy:startup :show-version t)');
    exit ($exit_code);
}


sub output_xindy_release () {
    my $version = 'unknown';
    my $version_file;
    if ( -f "$modules_dir/../VERSION" ) {
	$version_file = "$modules_dir/../VERSION";
    } elsif ( -f "$cmd_dir/../VERSION" ) {
	$version_file = "$cmd_dir/../VERSION";
    } elsif ( -f "$lib_dir/VERSION" ) {
	$version_file = "$lib_dir/VERSION";
    }
    if ( $version_file ) {
	if ( open(VERSION, "<$version_file") ) {
	    while ( $version = <VERSION> ) {
		chomp ($version);
		$version =~ s/\#.*// ;
		$version =~ s/^\s+// ;
		$version =~ s/\s+$// ;
		last  if $version;
	    }
	    close (VERSION);
	}
    }
    print "xindy release: $version\n";
}


# Helper function: Make a proper quoted Lisp string.

sub quotify ( $ ) {
    my $s = shift;
    $s =~ s:([\\\"]):\\$1:g ;
    return "\"$s\"";
}



#======================================================================
#
# $Log: xindy.pl,v $
# Revision 1.18  2011/01/18 22:18:29  jschrod
#     Document the range raw markup incompatibility with MakeIndex.
# (Bug ticket 998541)
#
# Revision 1.17  2010/08/12 00:16:01  jschrod
#     Output help message on stdout if there's no error.
#
# Revision 1.16  2010/05/10 23:39:24  jschrod
#     Incorporate TeX-Live patches from Vladimir Volovich and Peter
# Breitenlohner: Support for TL installation scheme, support for Mac OS
# X, support for Windows in TL.
#
# Revision 1.15  2010/04/20 00:15:23  jschrod
#     Emphasize incompatibility with hyperref in man page.
#
# Revision 1.14  2009/12/03 00:28:22  jschrod
#     Search perl via env.
#
# Revision 1.13  2009/03/29 11:14:04  jschrod
#     xindy.run does not exist any more, call clisp directly.
#
# Revision 1.12  2009/03/26 17:27:28  jschrod
#  Checking for variant name din needs to take trailing hyphen into account.
#
# Revision 1.11  2009/03/22 11:08:18  jschrod
#     man page: --v is --verbose, not --version.
#
# Revision 1.10  2009/03/21 18:05:11  jschrod
#     Variant rename of din to din5007 made explicit. (Proposed by
# Zdenek Wagner at 16 Mar 09.)
#
# Revision 1.9  2008/02/17 14:55:32  jschrod
#     Use exitcode 0 when usage is explicitly demanded with --help et.al.
#
# Revision 1.8  2006/07/30 10:30:42  jschrod
#     Check if an exec() error happened and output an error message.
# (Ticket 1230801)
#
# Revision 1.7  2006/07/19 00:29:56  jschrod
#     Support for omega input markup.
#
# Revision 1.6  2005/05/02 19:16:26  jschrod
#     Support new RTE 2.2, built with CLISP 2.33.2, that needs -E option
# to specify the default charset.
#     xindy also has proper version output in Lisp now, no need for
# workarounds in script any more.
#
# Revision 1.5  2004/11/01 22:48:51  jschrod
#     Locate xindy script.
#     Terminate on option error.
#     Fix up version output.
#
# Revision 1.4  2004/08/05 14:10:54  jschrod
#     Language variant names may have hyphens now. Language names must
# not have hyphens -- the first hyphen of the -L option argument
# separates language and variant name.
#     Revision 1.3 was completely off -- I committed a copy of texindy.
# I really don't know what happened there.
#
# Revision 1.2  2004/05/26 21:30:11  jschrod
#     Added POD documentation.
#
# Revision 1.1  2004/05/24 19:47:13  jschrod
#     Introduce new driver script, as part of the "Companion Release".
#