#! /usr/bin/perl -w
#
# scripts/setversion VERSION [DESCRIPTION [DISTRIBUTION]]
#
# Sets a new version number, including a debian/changelog entry (albeit
# a rather terse and informal one).

use strict;
use POSIX qw(strftime uname);

my $version = shift;
my $description;
my $distribution;
if(@ARGV > 0) {
    $description = shift;
} else {
    $description = "DisOrder $version";
}
if(@ARGV > 0) {
    $distribution = shift;
} else {
    $distribution = "unstable";
}

my $hostname = (uname)[1];
$hostname = (gethostbyname($hostname))[0];
my $logname = (getpwuid($<))[0];
my $name = (getpwuid($<))[6];
$name =~ s/,.*//;
my $email = "$logname\@$hostname";
if(exists $ENV{"EMAIL"}) {
    $email = $ENV{"EMAIL"};
}
my $date = strftime("%a, %d %b %Y %H:%M:%S %z", localtime);

sub input {
    my $path = shift;
    open(C, "<$path") or die "$path: $!\n";
    my @f = <C>;
    close C;
    return @f;
}

sub output {
    my $path = shift;
    my $contents = shift;
    my $new = "$path.new";
    (open(O, ">$new")
     and (print O @$contents)
     and (close O))
	or die "$new: $!\n";
    (rename $new, $path)
	or die "$new -> $path: $!\n";
}

my @c = input("configure.ac");
foreach(@c) {
    if(/^AC_INIT|AM_INIT/) {
	s/\[[0-9\.\+]+\]/[$version]/g;
    }
}
output("configure.ac", \@c);

@c = input("debian/changelog");
unshift(@c,
	"disorder ($version) $distribution; urgency=low\n",
	"\n",
	"  * $description\n",
	"\n",
	" -- $name <$email>  $date\n",
	"\n");
output("debian/changelog", \@c);