Commit | Line | Data |
---|---|---|
dfc16043 GM |
1 | #! /usr/bin/perl |
2 | ||
acaf905b | 3 | # Copyright (C) 2000-2012 Free Software Foundation, Inc. |
352c8b4a | 4 | |
dfc16043 | 5 | # This file is part of GNU Emacs. |
352c8b4a GM |
6 | |
7 | # GNU Emacs is free software: you can redistribute it and/or modify | |
dfc16043 | 8 | # it under the terms of the GNU General Public License as published by |
352c8b4a GM |
9 | # the Free Software Foundation, either version 3 of the License, or |
10 | # (at your option) any later version. | |
11 | ||
dfc16043 GM |
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. | |
352c8b4a | 16 | |
dfc16043 | 17 | # You should have received a copy of the GNU General Public License |
352c8b4a GM |
18 | # along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
19 | ||
dfc16043 GM |
20 | |
21 | require 5; | |
22 | use Getopt::Long; | |
23 | ||
24 | my $USAGE = <<ENDUSAGE; | |
25 | Remove \@tindex lines from files that were already present in previous | |
26 | versions. | |
27 | ||
28 | Usage: $0 [--old=EXT] FILE... | |
29 | $0 --help | |
30 | $0 --version | |
31 | ||
32 | --help display this help and exit | |
33 | --version print version and exit | |
34 | --old=DIR find old files in DIR | |
35 | ||
36 | The script performs two passes. In the first pass, Texinfo files from | |
37 | DIR are scanned for \@tindex lines, and identifiers in them are | |
38 | recorded. In a second pass, Texinfo files in the current directory | |
39 | are scanned, and \@tindex lines for identifiers that were recorded in | |
40 | the first pass are removed. Old file contents are saved in files | |
41 | with extension ".orig". A list of modified files and removed \@tindex | |
42 | identifiers is printed to stdout at the end. | |
43 | ENDUSAGE | |
44 | ||
45 | sub fatal { | |
46 | print STDERR "$0: ", @_, ".\n"; | |
47 | exit 1; | |
48 | } | |
49 | ||
50 | my $help = 0; | |
51 | my $version = 0; | |
52 | my $old; | |
53 | ||
177c0ea7 | 54 | my $rc = GetOptions ('help' => \$help, 'version' => \$version, |
dfc16043 GM |
55 | 'old=s' => \$old); |
56 | if ($version) { | |
57 | print "0.1\n"; | |
58 | exit 0; | |
59 | } elsif (!$rc || !$old || @ARGV) { | |
60 | print $USAGE; | |
61 | exit 1; | |
62 | } elsif ($help) { | |
63 | print $USAGE; | |
64 | exit 0; | |
65 | } | |
66 | ||
67 | # Fill the hash %tindex with associations VAR -> COUNT where | |
68 | # the keys VAR are identifiers mentioned in @tindex lines in the older | |
69 | # files to process and COUNT is the number of times they are seen in | |
70 | # the files. | |
71 | ||
72 | my %tindex; | |
73 | my %removed; | |
74 | my @old_files = glob "$old/*.texi"; | |
75 | my @new_files = glob "*.texi"; | |
76 | fatal ("No Texinfo files found in `$old'") unless @old_files; | |
77 | fatal ("No Texinfo files found in current directory") unless @new_files; | |
78 | ||
79 | print "Scanning old files for \@tindex lines\n"; | |
80 | foreach $file (@old_files) { | |
81 | open (IN, "<$file") or fatal "Cannot open $file: $!"; | |
82 | while (<IN>) { | |
83 | ++$tindex{$1} if /^\s*\@tindex\s+(\S+)/; | |
84 | } | |
85 | close IN; | |
86 | } | |
87 | ||
177c0ea7 | 88 | # Process current files and remove those @tindex lines which we |
dfc16043 GM |
89 | # know were already present in the files scanned above. |
90 | ||
91 | print "Removing old \@tindex lines\n"; | |
92 | foreach $file (@new_files) { | |
93 | my $modified = 0; | |
94 | my $contents = ""; | |
177c0ea7 | 95 | |
dfc16043 GM |
96 | open (IN, "< $file") or fatal "Cannot open $file.orig for reading: $!"; |
97 | while (<IN>) { | |
98 | if (/^\s*\@tindex\s+(\S+)/ && $tindex{$1}) { | |
99 | ++$removed{$1}; | |
100 | $modified = 1; | |
101 | } else { | |
102 | $contents = $contents . $_; | |
103 | } | |
104 | } | |
177c0ea7 | 105 | |
dfc16043 GM |
106 | close IN; |
107 | ||
108 | if ($modified) { | |
109 | print " $file\n"; | |
110 | system ("cp $file $file.orig") == 0 or fatal "Cannot backup $file: $!"; | |
111 | open (OUT, ">$file") or fatal "Cannot open $file for writing: $!"; | |
112 | print OUT $contents; | |
113 | close OUT; | |
114 | } | |
115 | } | |
116 | ||
117 | # Print a list of identifiers removed. | |
118 | ||
119 | print "Removed \@tindex commands for:\n"; | |
120 | my $key; | |
121 | foreach $key (keys %removed) { | |
122 | print " $key\n"; | |
123 | } | |
124 |