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1 | #! /usr/bin/perl |
2 | ||
3 | # Copyright (C) 2000 Free Software Foundation, Inc. | |
4 | # | |
5 | # This file is part of GNU Emacs. | |
6 | # | |
7 | # GNU Emacs is free software; you can redistribute it and/or modify | |
8 | # it under the terms of the GNU General Public License as published by | |
9 | # the Free Software Foundation; either version 2, or (at your option) | |
10 | # any later version. | |
11 | # | |
12 | # GNU Emacs is distributed in the hope that it will be useful, | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | # GNU General Public License for more details. | |
16 | # | |
17 | # You should have received a copy of the GNU General Public License | |
18 | # along with GNU Emacs; see the file COPYING. If not, write to the | |
19 | # Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | # Boston, MA 02111-1307, USA. | |
21 | ||
22 | require 5; | |
23 | use Getopt::Long; | |
24 | ||
25 | my $USAGE = <<ENDUSAGE; | |
26 | Remove \@tindex lines from files that were already present in previous | |
27 | versions. | |
28 | ||
29 | Usage: $0 [--old=EXT] FILE... | |
30 | $0 --help | |
31 | $0 --version | |
32 | ||
33 | --help display this help and exit | |
34 | --version print version and exit | |
35 | --old=DIR find old files in DIR | |
36 | ||
37 | The script performs two passes. In the first pass, Texinfo files from | |
38 | DIR are scanned for \@tindex lines, and identifiers in them are | |
39 | recorded. In a second pass, Texinfo files in the current directory | |
40 | are scanned, and \@tindex lines for identifiers that were recorded in | |
41 | the first pass are removed. Old file contents are saved in files | |
42 | with extension ".orig". A list of modified files and removed \@tindex | |
43 | identifiers is printed to stdout at the end. | |
44 | ENDUSAGE | |
45 | ||
46 | sub fatal { | |
47 | print STDERR "$0: ", @_, ".\n"; | |
48 | exit 1; | |
49 | } | |
50 | ||
51 | my $help = 0; | |
52 | my $version = 0; | |
53 | my $old; | |
54 | ||
177c0ea7 | 55 | my $rc = GetOptions ('help' => \$help, 'version' => \$version, |
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56 | 'old=s' => \$old); |
57 | if ($version) { | |
58 | print "0.1\n"; | |
59 | exit 0; | |
60 | } elsif (!$rc || !$old || @ARGV) { | |
61 | print $USAGE; | |
62 | exit 1; | |
63 | } elsif ($help) { | |
64 | print $USAGE; | |
65 | exit 0; | |
66 | } | |
67 | ||
68 | # Fill the hash %tindex with associations VAR -> COUNT where | |
69 | # the keys VAR are identifiers mentioned in @tindex lines in the older | |
70 | # files to process and COUNT is the number of times they are seen in | |
71 | # the files. | |
72 | ||
73 | my %tindex; | |
74 | my %removed; | |
75 | my @old_files = glob "$old/*.texi"; | |
76 | my @new_files = glob "*.texi"; | |
77 | fatal ("No Texinfo files found in `$old'") unless @old_files; | |
78 | fatal ("No Texinfo files found in current directory") unless @new_files; | |
79 | ||
80 | print "Scanning old files for \@tindex lines\n"; | |
81 | foreach $file (@old_files) { | |
82 | open (IN, "<$file") or fatal "Cannot open $file: $!"; | |
83 | while (<IN>) { | |
84 | ++$tindex{$1} if /^\s*\@tindex\s+(\S+)/; | |
85 | } | |
86 | close IN; | |
87 | } | |
88 | ||
177c0ea7 | 89 | # Process current files and remove those @tindex lines which we |
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90 | # know were already present in the files scanned above. |
91 | ||
92 | print "Removing old \@tindex lines\n"; | |
93 | foreach $file (@new_files) { | |
94 | my $modified = 0; | |
95 | my $contents = ""; | |
177c0ea7 | 96 | |
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97 | open (IN, "< $file") or fatal "Cannot open $file.orig for reading: $!"; |
98 | while (<IN>) { | |
99 | if (/^\s*\@tindex\s+(\S+)/ && $tindex{$1}) { | |
100 | ++$removed{$1}; | |
101 | $modified = 1; | |
102 | } else { | |
103 | $contents = $contents . $_; | |
104 | } | |
105 | } | |
177c0ea7 | 106 | |
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107 | close IN; |
108 | ||
109 | if ($modified) { | |
110 | print " $file\n"; | |
111 | system ("cp $file $file.orig") == 0 or fatal "Cannot backup $file: $!"; | |
112 | open (OUT, ">$file") or fatal "Cannot open $file for writing: $!"; | |
113 | print OUT $contents; | |
114 | close OUT; | |
115 | } | |
116 | } | |
117 | ||
118 | # Print a list of identifiers removed. | |
119 | ||
120 | print "Removed \@tindex commands for:\n"; | |
121 | my $key; | |
122 | foreach $key (keys %removed) { | |
123 | print " $key\n"; | |
124 | } | |
125 |