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gno-docs/etc/getdate
2012-09-03 23:27:31 -06:00

75 lines
1.4 KiB
Perl
Executable File

#! /usr/bin/perl -s
#
# Extract the date from the RCS Id string in a file.
#
# $Id: getdate,v 1.1 2012/08/26 02:27:36 gdr Exp $
#
use strict;
my @month;
push(@month,
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
"Oct", "Nov", "Dec" );
# for ($i=0; $i<12; $i++) {
# printf("month %d is %s\n", $i, $month[$i]);
# }
my $printdate = 0;
my $printversion = 0;
if (defined($::date)) {
$printdate = 1;
}
if (defined($::version)) {
$printversion = 1;
}
my %sortedDates;
my %sortedVersions;
my $date = "(unspecified date)";
my $version = "(unspecified version)";
while(<>) {
if (/\$Id([^\$]*)\$/) {
$_ = $1;
if (/^:\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+/) {
my $file=$1;
my $v=$2;
my $rawdate=$3;
my $time=$4;
if ($rawdate =~ m,(\d+)[-/](\d+)[-/](\d+),) {
my $year = $1;
my $m = $2;
my $day = $3;
my $mon = @month[int($2) - 1];
my $d = "$day $mon $year";
my $fakedate = int($day) + 100 * int($m) + 10000 * int($year);
$sortedDates{"$fakedate"} = $d;
$sortedVersions{"$fakedate"} = $v;
}
}
}
}
my @fakes = sort(keys(%sortedDates));
my $lastFake = pop @fakes;
if (defined($lastFake)) {
$date = $sortedDates{$lastFake};
$version = $sortedVersions{$lastFake};
}
if ($printdate) {
printf("%s\n", $date);
} elsif ($printversion) {
printf("%s\n", $version);
} else {
printf("getdate: bad invocation\n");
exit(1);
}
exit(0);