From dfc16043b155d13d8ae562dcc268e4b73b1f59f1 Mon Sep 17 00:00:00 2001
From: Gerd Moellmann <gerd@gnu.org>
Date: Wed, 5 Jan 2000 14:29:52 +0000
Subject: [PATCH] *** empty log message ***

---
 lispref/ChangeLog |   4 ++
 lispref/tindex.pl | 125 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 129 insertions(+)
 create mode 100755 lispref/tindex.pl

diff --git a/lispref/ChangeLog b/lispref/ChangeLog
index a0b19b8908..44dcbe5ffb 100644
--- a/lispref/ChangeLog
+++ b/lispref/ChangeLog
@@ -1,3 +1,7 @@
+2000-01-05  Gerd Moellmann  <gerd@gnu.org>
+
+	* tindex.pl: New script.
+
 1999-12-03  Dave Love  <fx@gnu.org>
 
 	* Makefile.in (MAKEINFO): New parameter.
diff --git a/lispref/tindex.pl b/lispref/tindex.pl
new file mode 100755
index 0000000000..c138f5d66f
--- /dev/null
+++ b/lispref/tindex.pl
@@ -0,0 +1,125 @@
+#! /usr/bin/perl
+
+# Copyright (C) 2000 Free Software Foundation, Inc.
+#
+# This file is part of GNU Emacs.
+#
+# GNU Emacs 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, or (at your option)
+# any later version.
+#
+# GNU Emacs 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.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Emacs; see the file COPYING.  If not, write to the
+# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+
+require 5;
+use Getopt::Long;
+
+my $USAGE = <<ENDUSAGE;
+Remove \@tindex lines from files that were already present in previous
+versions.
+
+Usage: $0 [--old=EXT] FILE...
+       $0 --help
+       $0 --version
+
+  --help	display this help and exit
+  --version	print version and exit
+  --old=DIR	find old files in DIR
+
+The script performs two passes.  In the first pass, Texinfo files from
+DIR are scanned for \@tindex lines, and identifiers in them are
+recorded.  In a second pass, Texinfo files in the current directory
+are scanned, and \@tindex lines for identifiers that were recorded in
+the first pass are removed.  Old file contents are saved in files
+with extension ".orig".  A list of modified files and removed \@tindex
+identifiers is printed to stdout at the end.
+ENDUSAGE
+
+sub fatal {
+    print STDERR "$0: ", @_, ".\n";
+    exit 1;
+}
+
+my $help = 0;
+my $version = 0;
+my $old;
+
+my $rc = GetOptions ('help' => \$help, 'version' => \$version, 
+                     'old=s' => \$old);
+if ($version) {
+    print "0.1\n";
+    exit 0;
+} elsif (!$rc || !$old || @ARGV) {
+    print $USAGE;
+    exit 1;
+} elsif ($help) {
+    print $USAGE;
+    exit 0;
+}
+
+# Fill the hash %tindex with associations VAR -> COUNT where
+# the keys VAR are identifiers mentioned in @tindex lines in the older
+# files to process and COUNT is the number of times they are seen in
+# the files.
+
+my %tindex;
+my %removed;
+my @old_files = glob "$old/*.texi";
+my @new_files = glob "*.texi";
+fatal ("No Texinfo files found in `$old'") unless @old_files;
+fatal ("No Texinfo files found in current directory") unless @new_files;
+
+print "Scanning old files for \@tindex lines\n";
+foreach $file (@old_files) {
+    open (IN, "<$file") or fatal "Cannot open $file: $!";
+    while (<IN>) {
+	++$tindex{$1} if /^\s*\@tindex\s+(\S+)/;
+    }
+    close IN;
+}
+
+# Process current files and remove those @tindex lines which we 
+# know were already present in the files scanned above.
+
+print "Removing old \@tindex lines\n";
+foreach $file (@new_files) {
+    my $modified = 0;
+    my $contents = "";
+    
+    open (IN, "< $file") or fatal "Cannot open $file.orig for reading: $!";
+    while (<IN>) {
+	if (/^\s*\@tindex\s+(\S+)/ && $tindex{$1}) {
+	    ++$removed{$1};
+	    $modified = 1;
+	} else {
+	    $contents = $contents . $_;
+	}
+    }
+    
+    close IN;
+
+    if ($modified) {
+	print "  $file\n";
+	system ("cp $file $file.orig") == 0 or fatal "Cannot backup $file: $!";
+	open (OUT, ">$file") or fatal "Cannot open $file for writing: $!";
+	print OUT $contents;
+	close OUT;
+    }
+}
+
+# Print a list of identifiers removed.
+
+print "Removed \@tindex commands for:\n";
+my $key;
+foreach $key (keys %removed) {
+    print "  $key\n";
+}
+
-- 
2.20.1