VERSION

#!/usr/local/bin/perl

=head1 VERSION

This is a self-modifying file. Whenever a version number in one of the
members increases, this program increases its own version number by
0.01. Members are enumerated below the __END__ token.

This implies that we get a new timestamp. If we make Makefile
dependent on this program, we get a new Makefile everytime one of the
versions changes. It is really not the cheapest solution, but maybe
the most trivial one.

Add a new module by writing its name on a line after the __END__ token.

Change the overall version number arbitrarily by changing it within
this file.

=head1 Author

Andreas Koenig <koenig@mind.de>

=cut

$VERSION=0.06;

use lib "lib";

while (<DATA>){
    chop;
    my($lib,$version)=split;
    next unless $lib;
    $lib{$lib}=$version || 0;
}


for $lib (sort keys %lib) {
    push @m, "use $lib;";
    push @n, "\$rewrite++ if \$$lib\::VERSION > $lib{$lib};\n";
    push @o, "$lib \$$lib\::VERSION\n";
}

eval join "", @m;
die $@ if $@;
eval join "", @n;
die $@ if $@;
eval join "", "\$o = \"", @o, "\"";
die $@ if $@;

&rewrite if $rewrite;
printf "%.2f\n", $VERSION;

sub rewrite
{
    $VERSION += 0.01;
    open READ, "$0" or die "Can't read myself: $!";
    $versions = "";
    while (<READ>) {
	s/(^\$VERSION=)\d+\.\d+/$1.$VERSION/e;
	$versions .= $_;
	last if /^__END__/;
    }
    close READ;
    open WRITE, ">$0";
    print WRITE $versions;
    print WRITE $o;
    close WRITE;

    # Let's also update the version number in the README file
# XXX this does not work for me (aas@oslonett.no)
#    $^I="~";
#    @ARGV=qw(README);
#    while (<>) {
#	s/(lwp version)\\s+\\d+\\.\\d+([a-z]\d*)?/\$1 $VERSION/ig;
#    }
}

__END__
HTTP::Date 1.07
LWP 0.03
LWP::Base64 1.06
LWP::Socket 1.06
URI::URL 3.03