eval '(exit $?0)' && eval 'exec perl -wS -0777 -pi "$0" "$@"'

  & eval 'exec perl -wS -0777 -pi "$0" $argv:q'

    if 0;

# Update an FSF copyright year list to include the current year.

my $VERSION = '2016-01-12.23:13'; # UTC

# Copyright (C) 2009-2017 Free Software Foundation, Inc.

#

# This program 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 3, 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.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Written by Jim Meyering and Joel E. Denny

# The arguments to this script should be names of files that contain

# copyright statements to be updated.  The copyright holder's name

# defaults to "Free Software Foundation, Inc." but may be changed to

# any other name by using the "UPDATE_COPYRIGHT_HOLDER" environment

# variable.

#

# For example, you might wish to use the update-copyright target rule

# in maint.mk from gnulib's maintainer-makefile module.

#

# Iff a copyright statement is recognized in a file and the final

# year is not the current year, then the statement is updated for the

# new year and it is reformatted to:

#

#   1. Fit within 72 columns.

#   2. Convert 2-digit years to 4-digit years by prepending "19".

#   3. Expand copyright year intervals.  (See "Environment variables"

#      below.)

#

# A warning is printed for every file for which no copyright

# statement is recognized.

#

# Each file's copyright statement must be formatted correctly in

# order to be recognized.  For example, each of these is fine:

#

#   Copyright @copyright{} 1990-2005, 2007-2009 Free Software

#   Foundation, Inc.

#

#   # Copyright (C) 1990-2005, 2007-2009 Free Software

#   # Foundation, Inc.

#

#   /*

#    * Copyright © 90,2005,2007-2009

#    * Free Software Foundation, Inc.

#    */

#

# However, the following format is not recognized because the line

# prefix changes after the first line:

#

#   ## Copyright (C) 1990-2005, 2007-2009 Free Software

#   #  Foundation, Inc.

#

# However, any correctly formatted copyright statement following

# a non-matching copyright statements would be recognized.

#

# The exact conditions that a file's copyright statement must meet

# to be recognized are:

#

#   1. It is the first copyright statement that meets all of the

#      following conditions.  Subsequent copyright statements are

#      ignored.

#   2. Its format is "Copyright (C)", then a list of copyright years,

#      and then the name of the copyright holder.

#   3. The "(C)" takes one of the following forms or is omitted

#      entirely:

#

#        A. (C)

#        B. (c)

#        C. @copyright{}

#        D. ©

#

#   4. The "Copyright" appears at the beginning of a line, except that it

#      may be prefixed by any sequence (e.g., a comment) of no more than

#      5 characters -- including white space.

#   5. Iff such a prefix is present, the same prefix appears at the

#      beginning of each remaining line within the FSF copyright

#      statement.  There is one exception in order to support C-style

#      comments: if the first line's prefix contains nothing but

#      whitespace surrounding a "/*", then the prefix for all subsequent

#      lines is the same as the first line's prefix except with each of

#      "/" and possibly "*" replaced by a " ".  The replacement of "*"

#      by " " is consistent throughout all subsequent lines.

#   6. Blank lines, even if preceded by the prefix, do not appear

#      within the FSF copyright statement.

#   7. Each copyright year is 2 or 4 digits, and years are separated by

#      commas or dashes.  Whitespace may appear after commas.

#

# Environment variables:

#

#   1. If UPDATE_COPYRIGHT_FORCE=1, a recognized FSF copyright statement

#      is reformatted even if it does not need updating for the new

#      year.  If unset or set to 0, only updated FSF copyright

#      statements are reformatted.

#   2. If UPDATE_COPYRIGHT_USE_INTERVALS=1, every series of consecutive

#      copyright years (such as 90, 1991, 1992-2007, 2008) in a

#      reformatted FSF copyright statement is collapsed to a single

#      interval (such as 1990-2008).  If unset or set to 0, all existing

#      copyright year intervals in a reformatted FSF copyright statement

#      are expanded instead.

#      If UPDATE_COPYRIGHT_USE_INTERVALS=2, convert a sequence with gaps

#      to the minimal containing range.  For example, convert

#      2000, 2004-2007, 2009 to 2000-2009.

#   3. For testing purposes, you can set the assumed current year in

#      UPDATE_COPYRIGHT_YEAR.

#   4. The default maximum line length for a copyright line is 72.

#      Set UPDATE_COPYRIGHT_MAX_LINE_LENGTH to use a different length.

#   5. Set UPDATE_COPYRIGHT_HOLDER if the copyright holder is other

#      than "Free Software Foundation, Inc.".

use strict;

use warnings;

my $copyright_re = 'Copyright';

my $circle_c_re = '(?:\([cC]\)|@copyright\{}|\\\\\(co|©)';

my $holder = $ENV{UPDATE_COPYRIGHT_HOLDER};

$holder ||= 'Free Software Foundation, Inc.';

my $prefix_max = 5;

my $margin = $ENV{UPDATE_COPYRIGHT_MAX_LINE_LENGTH};

!$margin || $margin !~ m/^\d+$/

  and $margin = 72;

my $tab_width = 8;

my $this_year = $ENV{UPDATE_COPYRIGHT_YEAR};

if (!$this_year || $this_year !~ m/^\d{4}$/)

  {

    my ($sec, $min, $hour, $mday, $month, $year) = localtime (time ());

    $this_year = $year + 1900;

  }

# Unless the file consistently uses "\r\n" as the EOL, use "\n" instead.

my $eol = /(?:^|[^\r])\n/ ? "\n" : "\r\n";

my $leading;

my $prefix;

my $ws_re;

my $stmt_re;

while (/(^|\n)(.{0,$prefix_max})$copyright_re/g)

  {

    $leading = "$1$2";

    $prefix = $2;

    if ($prefix =~ /^(\s*\/)\*(\s*)$/)

      {

        $prefix =~ s,/, ,;

        my $prefix_ws = $prefix;

        $prefix_ws =~ s/\*/ /; # Only whitespace.

        if (/\G(?:[^*\n]|\*[^\/\n])*\*?\n$prefix_ws/)

          {

            $prefix = $prefix_ws;

          }

      }

    $ws_re = '[ \t\r\f]'; # \s without \n

    $ws_re =

      "(?:$ws_re*(?:$ws_re|\\n" . quotemeta($prefix) . ")$ws_re*)";

    my $holder_re = $holder;

    $holder_re =~ s/\s/$ws_re/g;

    my $stmt_remainder_re =

      "(?:$ws_re$circle_c_re)?"

      . "$ws_re(?:(?:\\d\\d)?\\d\\d(?:,$ws_re?|-))*"

      . "((?:\\d\\d)?\\d\\d)$ws_re$holder_re";

    if (/\G$stmt_remainder_re/)

      {

        $stmt_re =

          quotemeta($leading) . "($copyright_re$stmt_remainder_re)";

        last;

      }

  }

if (defined $stmt_re)

  {

    /$stmt_re/ or die; # Should never die.

    my $stmt = $1;

    my $final_year_orig = $2;

    # Handle two-digit year numbers like "98" and "99".

    my $final_year = $final_year_orig;

    $final_year <= 99

      and $final_year += 1900;

    if ($final_year != $this_year)

      {

        # Update the year.

        $stmt =~ s/\b$final_year_orig\b/$final_year, $this_year/;

      }

    if ($final_year != $this_year || $ENV{'UPDATE_COPYRIGHT_FORCE'})

      {

        # Normalize all whitespace including newline-prefix sequences.

        $stmt =~ s/$ws_re/ /g;

        # Put spaces after commas.

        $stmt =~ s/, ?/, /g;

        # Convert 2-digit to 4-digit years.

        $stmt =~ s/(\b\d\d\b)/19$1/g;

        # Make the use of intervals consistent.

        if (!$ENV{UPDATE_COPYRIGHT_USE_INTERVALS})

          {

            $stmt =~ s/(\d{4})-(\d{4})/join(', ', $1..$2)/eg;

          }

        else

          {

            $stmt =~

              s/

                (\d{4})

                (?:

                  (,\ |-)

                  ((??{

                    if    ($2 eq '-') { '\d{4}'; }

                    elsif (!$3)       { $1 + 1;  }

                    else              { $3 + 1;  }

                  }))

                )+

              /$1-$3/gx;

            # When it's 2, emit a single range encompassing all year numbers.

            $ENV{UPDATE_COPYRIGHT_USE_INTERVALS} == 2

              and $stmt =~ s/\b(\d{4})\b.*\b(\d{4})\b/$1-$2/;

          }

        # Format within margin.

        my $stmt_wrapped;

        my $text_margin = $margin - length($prefix);

        if ($prefix =~ /^(\t+)/)

          {

            $text_margin -= length($1) * ($tab_width - 1);

          }

        while (length $stmt)

          {

            if (($stmt =~ s/^(.{1,$text_margin})(?: |$)//)

                || ($stmt =~ s/^([\S]+)(?: |$)//))

              {

                my $line = $1;

                $stmt_wrapped .= $stmt_wrapped ? "$eol$prefix" : $leading;

                $stmt_wrapped .= $line;

              }

            else

              {

                # Should be unreachable, but we don't want an infinite

                # loop if it can be reached.

                die;

              }

          }

        # Replace the old copyright statement.

        s/$stmt_re/$stmt_wrapped/;

      }

  }

else

  {

    print STDERR "$ARGV: warning: copyright statement not found\n";

  }

# Local variables:

# mode: perl

# indent-tabs-mode: nil

# eval: (add-hook 'write-file-hooks 'time-stamp)

# time-stamp-start: "my $VERSION = '"

# time-stamp-format: "%:y-%02m-%02d.%02H:%02M"

# time-stamp-time-zone: "UTC0"

# time-stamp-end: "'; # UTC"

# End: