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annotate build-aux/gitlog-to-changelog @ 12217:e9550a750583

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perl scripts: remove #!/usr/bin/perl in favor of more portable... Rather than putting #!/usr/bin/perl on the first line, start with a variant of what's recommended by "man perlrun" that invokes the first "perl" program from your shell's search path. * build-aux/gitlog-to-changelog: Replace #!... as above. Add a "Local Variables" perl mode setting. Prompted by a patch from Ludovic Courtès. Improved by Eric Blake. * build-aux/useless-if-before-free: Likewise. * build-aux/announce-gen: Likewise. * build-aux/update-copyright: Likewise.
author Jim Meyering <meyering@redhat.com>
date Fri, 30 Oct 2009 15:02:02 +0100
parents 9db809f9b38f
children b5e42ef33b49
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1 eval '(exit $?0)' && eval 'exec perl -wS "$0" ${1+"$@"}'
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2 & eval 'exec perl -wS "$0" $argv:q'
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3 if 0;
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4 # Convert git log output to ChangeLog format.
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5
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6 my $VERSION = '2009-10-30 13:46'; # UTC
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7 # The definition above must lie within the first 8 lines in order
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8 # for the Emacs time-stamp write hook (at end) to update it.
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9 # If you change this file with Emacs, please let the write hook
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10 # do its job. Otherwise, update this string manually.
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11
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12 # Copyright (C) 2008, 2009 Free Software Foundation, Inc.
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13
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14 # This program is free software: you can redistribute it and/or modify
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15 # it under the terms of the GNU General Public License as published by
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16 # the Free Software Foundation, either version 3 of the License, or
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17 # (at your option) any later version.
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18
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19 # This program is distributed in the hope that it will be useful,
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20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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22 # GNU General Public License for more details.
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23
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24 # You should have received a copy of the GNU General Public License
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25 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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26
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27 # Written by Jim Meyering
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28
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29 use strict;
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30 use warnings;
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31 use Getopt::Long;
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32 use POSIX qw(strftime);
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33
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34 (my $ME = $0) =~ s|.*/||;
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35
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36 # use File::Coda; # http://meyering.net/code/Coda/
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37 END {
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38 defined fileno STDOUT or return;
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39 close STDOUT and return;
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40 warn "$ME: failed to close standard output: $!\n";
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41 $? ||= 1;
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42 }
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43
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44 sub usage ($)
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45 {
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46 my ($exit_code) = @_;
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47 my $STREAM = ($exit_code == 0 ? *STDOUT : *STDERR);
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48 if ($exit_code != 0)
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49 {
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50 print $STREAM "Try `$ME --help' for more information.\n";
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51 }
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52 else
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53 {
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54 print $STREAM <<EOF;
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55 Usage: $ME [OPTIONS] [ARGS]
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56
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57 Convert git log output to ChangeLog format. If present, any ARGS
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58 are passed to "git log". To avoid ARGS being parsed as options to
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59 $ME, they may be preceded by '--'.
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60
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61 OPTIONS:
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62
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63 --since=DATE convert only the logs since DATE;
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64 the default is to convert all log entries.
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65 --format=FMT set format string for commit subject and body;
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66 see 'man git-log' for the list of format metacharacters;
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67 the default is '%s%n%b%n'
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68
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69 --help display this help and exit
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70 --version output version information and exit
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71
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72 EXAMPLE:
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73
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74 $ME --since=2008-01-01 > ChangeLog
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75 $ME -- -n 5 foo > last-5-commits-to-branch-foo
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76
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77 EOF
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78 }
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79 exit $exit_code;
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80 }
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81
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82 # If the string $S is a well-behaved file name, simply return it.
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83 # If it contains white space, quotes, etc., quote it, and return the new string.
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84 sub shell_quote($)
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85 {
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86 my ($s) = @_;
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87 if ($s =~ m![^\w+/.,-]!)
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88 {
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89 # Convert each single quote to '\''
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90 $s =~ s/\'/\'\\\'\'/g;
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91 # Then single quote the string.
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92 $s = "'$s'";
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93 }
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94 return $s;
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95 }
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96
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97 sub quoted_cmd(@)
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98 {
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99 return join (' ', map {shell_quote $_} @_);
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100 }
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101
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102 {
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103 my $since_date = '1970-01-01 UTC';
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104 my $format_string = '%s%n%b%n';
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105 GetOptions
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106 (
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107 help => sub { usage 0 },
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108 version => sub { print "$ME version $VERSION\n"; exit },
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109 'since=s' => \$since_date,
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110 'format=s' => \$format_string,
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111 ) or usage 1;
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112
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113 my @cmd = (qw (git log --log-size), "--since=$since_date",
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114 '--pretty=format:%ct %an <%ae>%n%n'.$format_string, @ARGV);
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115 open PIPE, '-|', @cmd
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116 or die ("$ME: failed to run `". quoted_cmd (@cmd) ."': $!\n"
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117 . "(Is your Git too old? Version 1.5.1 or later is required.)\n");
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118
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119 my $prev_date_line = '';
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120 while (1)
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121 {
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122 defined (my $in = <PIPE>)
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123 or last;
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124 $in =~ /^log size (\d+)$/
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125 or die "$ME:$.: Invalid line (expected log size):\n$in";
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126 my $log_nbytes = $1;
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127
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128 my $log;
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129 my $n_read = read PIPE, $log, $log_nbytes;
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130 $n_read == $log_nbytes
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131 or die "$ME:$.: unexpected EOF\n";
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132
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133 my @line = split "\n", $log;
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134 my $author_line = shift @line;
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135 defined $author_line
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136 or die "$ME:$.: unexpected EOF\n";
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137 $author_line =~ /^(\d+) (.*>)$/
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138 or die "$ME:$.: Invalid line "
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139 . "(expected date/author/email):\n$author_line\n";
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140
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141 my $date_line = sprintf "%s $2\n", strftime ("%F", localtime ($1));
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142 # If this line would be the same as the previous date/name/email
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143 # line, then arrange not to print it.
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144 if ($date_line ne $prev_date_line)
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145 {
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146 $prev_date_line eq ''
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147 or print "\n";
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148 print $date_line;
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149 }
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150 $prev_date_line = $date_line;
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151
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152 # Omit "Signed-off-by..." lines.
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153 @line = grep !/^Signed-off-by: .*>$/, @line;
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154
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155 # If there were any lines
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156 if (@line == 0)
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157 {
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158 warn "$ME: warning: empty commit message:\n $date_line\n";
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159 }
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160 else
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161 {
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162 # Remove leading and trailing blank lines.
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163 while ($line[0] =~ /^\s*$/) { shift @line; }
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164 while ($line[$#line] =~ /^\s*$/) { pop @line; }
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165
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166 # Prefix each non-empty line with a TAB.
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167 @line = map { length $_ ? "\t$_" : '' } @line;
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168
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169 print "\n", join ("\n", @line), "\n";
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170 }
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171
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172 defined ($in = <PIPE>)
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173 or last;
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174 $in ne "\n"
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175 and die "$ME:$.: unexpected line:\n$in";
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176 }
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177
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178 close PIPE
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179 or die "$ME: error closing pipe from " . quoted_cmd (@cmd) . "\n";
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180 # FIXME-someday: include $PROCESS_STATUS in the diagnostic
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181 }
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182
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183 # Local Variables:
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184 # mode: perl
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185 # indent-tabs-mode: nil
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186 # eval: (add-hook 'write-file-hooks 'time-stamp)
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187 # time-stamp-start: "my $VERSION = '"
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188 # time-stamp-format: "%:y-%02m-%02d %02H:%02M"
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189 # time-stamp-time-zone: "UTC"
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190 # time-stamp-end: "'; # UTC"
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191 # End: