1 #!/usr/bin/perl -0777 -pi
2 # Update an FSF copyright year list to include the current year.
4 my $VERSION = '2009-08-05.20:47'; # UTC
6 # Copyright (C) 2009 Free Software Foundation, Inc.
8 # This program is free software; you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation; either version 3, or (at your option)
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 # Written by Jim Meyering and Joel E. Denny
23 # The arguments to this script should be names of files that contain FSF
24 # copyright statements to be updated. For example, you may wish to
25 # place a target like the following in the top-level makefile in your
28 # .PHONY: update-copyright
30 # if test -d .git; then \
31 # git grep -l -w Copyright \
32 # | grep -v -E '(^|/)(COPYING|ChangeLog)' \
33 # | xargs $(srcdir)/build-aux/$@; \
36 # In the second grep, you can build a list of files to skip within your
39 # Iff an FSF copyright statement is discovered in a file and the final
40 # year is not the current year, the statement is updated for the new
41 # year and reformatted to fit within 72 columns. A warning is printed
42 # for every file for which no FSF copyright statement is discovered.
44 # Each file's FSF copyright statement must be formated correctly in
45 # order to be recognized. For example, each of these is fine:
47 # Copyright @copyright{} 1990-2005, 2007-2009 Free Software
50 # # Copyright (C) 1990-2005, 2007-2009 Free Software
54 # * Copyright © 90,2005,2007-2009
55 # * Free Software Foundation, Inc.
58 # However, the following format is not recognized because the line
59 # prefix changes after the first line:
61 # /* Copyright (C) 1990-2005, 2007-2009 Free Software
62 # * Foundation, Inc. */
64 # The following copyright statement is not recognized because the
65 # copyright holder is not the FSF:
67 # Copyright (C) 1990-2005, 2007-2009 Acme, Inc.
69 # However, any correctly formatted FSF copyright statement following
70 # either of the previous two copyright statements would be recognized.
72 # The exact conditions that a file's FSF copyright statement must meet
73 # to be recognized are:
75 # 1. The format is "Copyright (C)" (where "(C)" can also be "(c)",
76 # "@copyright{}", or "©"), then a list of copyright years, and
77 # then the name of the copyright holder, which is "Free Software
79 # 2. The "Copyright (C)" appears at the beginning of a line except
80 # that it may be prefixed by any sequence (e.g., a comment) of no
81 # more than 5 characters.
82 # 3. Iff such a prefix is present, the same prefix appears at the
83 # beginning of each remaining line within the FSF copyright
85 # 4. Blank lines, even if preceded by the prefix, do not appear
86 # within the FSF copyright statement.
87 # 5. Each copyright year is 2 or 4 digits, and years are separated by
88 # commas or dashes. Whitespace may occur after commas.
89 # 6. It is the first FSF copyright statement that meets all of the
90 # above conditions. Subsequent FSF copyright statements are
96 my $copyright_re = 'Copyright (?:\([cC]\)|@copyright{}|©)';
97 my $holder = 'Free Software Foundation, Inc.';
102 my $this_year = $ENV{UPDATE_COPYRIGHT_YEAR};
103 if (!$this_year || $this_year !~ m/^\d{4}$/)
105 my ($sec, $min, $hour, $mday, $month, $year) = localtime (time ());
106 $this_year = $year + 1900;
109 # Unless the file consistently uses "\r\n" as the EOL, use "\n" instead.
110 my $eol = /(?:^|[^\r])\n/ ? "\n" : "\r\n";
116 while (/(^|\n)(.{0,$prefix_max})$copyright_re/g)
120 $ws_re = '[ \t\r\f]'; # \s without \n
122 "(?:$ws_re*(?:$ws_re|\\n" . quotemeta($prefix) . ")$ws_re*)";
123 my $holder_re = $holder;
124 $holder_re =~ s/\s/$ws_re/g;
125 my $stmt_remainder_re =
126 "$ws_re(?:(?:\\d\\d)?\\d\\d(,$ws_re?|-))*"
127 . "((?:\\d\\d)?\\d\\d)$ws_re$holder_re";
128 if (/\G$stmt_remainder_re/)
131 quotemeta("$leading$prefix")
132 . "($copyright_re$stmt_remainder_re)";
136 if (defined $stmt_re)
138 /$stmt_re/ or die; # Should never die.
140 my $sep = $2 ? $2 : "";
141 my $final_year_orig = $3;
143 # Handle two-digit year numbers like "98" and "99".
144 my $final_year = $final_year_orig;
146 and $final_year += 1900;
148 if ($final_year != $this_year)
151 if ($sep eq '-' && $final_year + 1 == $this_year)
153 $stmt =~ s/$final_year_orig/$this_year/;
155 elsif ($sep ne '-' && $final_year + 1 == $this_year)
157 $stmt =~ s/$final_year_orig/$final_year-$this_year/;
161 $stmt =~ s/$final_year_orig/$final_year, $this_year/;
164 # Normalize all whitespace including newline-prefix sequences.
165 $stmt =~ s/$ws_re/ /g;
167 # Put spaces after commas.
170 # Format within margin.
172 my $text_margin = $margin - length($prefix);
173 if ($prefix =~ /^(\t+)/)
175 $text_margin -= length($1) * ($tab_width - 1);
179 if (($stmt =~ s/^(.{1,$text_margin})(?: |$)//)
180 || ($stmt =~ s/^([\S]+)(?: |$)//))
183 $stmt_wrapped .= $stmt_wrapped ? $eol : $leading;
184 $stmt_wrapped .= "$prefix$line";
188 # Should be unreachable, but we don't want an infinite
189 # loop if it can be reached.
194 # Replace the old copyright statement.
195 s/$stmt_re/$stmt_wrapped/;
200 print STDERR "$ARGV: warning: FSF copyright statement not found\n";
204 # indent-tabs-mode: nil
205 # eval: (add-hook 'write-file-hooks 'time-stamp)
206 # time-stamp-start: "my $VERSION = '"
207 # time-stamp-format: "%:y-%02m-%02d.%02H:%02M"
208 # time-stamp-time-zone: "UTC"
209 # time-stamp-end: "'; # UTC"