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#!/usr/bin/perl -w
#
# Copyright 2004 Jörg Mayer (see AUTHORS file)
#
# $Id: make-version.pl,v 1.5 2004/02/01 11:32:23 obiot Exp $
#
# Ethereal - Network traffic analyzer
# By Gerald Combs <gerald@ethereal.com>
# Copyright 1998 Gerald Combs
#
# 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 2
# of the License, 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# usage: ./make-version.pl
use strict;
my $version_file = 'cvsversion.h';
my %asctonum = ( "Jan" => "01", "Feb" => "02", "Mar" => "03", "Apr" => "04",
"May" => "05", "Jun" => "06", "Jul" => "07", "Aug" => "08",
"Sep" => "09", "Oct" => "10", "Nov" => "11", "Dec" => "12" );
my $last = "";
my $last_modified = 0;
my $last_file = undef;
# Recursively find all CVS Entries files starting from the given directory,
# and compute the modification time of the most recently modified Entries file.
sub find_last_CVS_Entries {
my $dir = shift;
my $d;
opendir(DIR, "$dir") || print STDERR "Can't open directory $dir ($!)\n" && next;
foreach $d (readdir(DIR)) {
if (-d "$dir/$d" && $d !~ /^\.(|.)$/) {
if ($d =~ /^CVS$/) {
my @stat = stat("$dir/CVS/Entries");
if (@stat) {
if ($last_modified < $stat[9]) {
$last_modified = $stat[9];
$last_file = "$dir/CVS/Entries"
}
}
} else { # Recurse in directory
&find_last_CVS_Entries("$dir/$d");
}
}
}
closedir DIR;
}
# Check all entries in $file. In case they are newer, update $last accordingly
# Args: Entries file
sub lastentry {
my $date;
my ($wdayascii, $monthascii, $day, $time, $year);
my $file = shift;
my $current;
open(FILE, "<$file") || print STDERR "Open $file for reading failed ($!)\n" && return 1;
while (<FILE>) {
chomp;
# Regular lines look like this: /ethereal_be.py/1.6/Fri Aug 2 22:55:19 2002//
next if (/^D/);
$date = (split(/\//, $_, 5))[3];
next if ($date !~ /\d:\d\d:\d\d/);
($wdayascii, $monthascii, $day, $time, $year) = split(/\s+/, $date);
$day = substr("0".$day, -2, 2);
$time =~ s/://g;
$current = "$year$asctonum{$monthascii}$day$time";
if ($current gt $last) {
$last = $current;
}
}
close FILE;
return 1;
}
# Print the CVS version to $version_file.
# Don't change the file if it is not needed.
sub print_cvs_version
{
my $cvs_version;
my $needs_update = 1;
if ($last ne "") {
$cvs_version = "#define CVSVERSION \"$last\"\n";
} else {
$cvs_version = "/* #define CVSVERSION \"\" */\n";
}
if (open(OLDVER, "<$version_file")) {
if (<OLDVER> eq $cvs_version) {
print "$version_file is up-to-date.\n";
$needs_update = 0;
}
close OLDVER;
}
if ($needs_update == 1) {
# print "Updating $version_file so it contains:\n$cvs_version";
open(VER, ">$version_file") || die ("Cannot write to $version_file ($!)\n");
print VER "$cvs_version";
close VER;
print "$version_file has been updated.\n";
}
}
##
## Start of code
##
if (-d "./CVS") {
print "This is a build from CVS (or a CVS snapshot), "
. "CVS version tag will be computed.\n";
&find_last_CVS_Entries(".");
} else {
print "This is not a CVS build.\n";
}
# Now $last_modified and $last_file are set if we found one CVS/Entries file.
# We need to invoke lastentry on the most recent entries file.
if (defined $last_file) {
my @version_stat = stat($version_file);
my $version_mtime = 0;
if (@version_stat) {
$version_mtime = $version_stat[9];
}
&lastentry($last_file);
# print "Last: $last_file\t($last)\n";
}
# Now that we've computed everything, print the CVS version to $version_file
&print_cvs_version;
__END__
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