#!/usr/bin/perl
# Usage:
#  perl debian.mkchanges <version> <debian.changestemplate >thing.changes

$x=time; sub z { $_[1]+$_[2]*60; }; @l=localtime($x); $od=1440;
$d=&z(@l)-&z(gmtime($x)); $d+=$od; $d%=$od; $s=$d>$od/2?($d=$od-$d,'-'):'+';
$date=sprintf("%s, %d %s %d %02d:%02d:%02d %s%02d%02d",
 (Sun,Mon,Tue,Wed,Thu,Fri,Sat)[$l[6]], $l[3],
 (Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec)[$l[4]], $l[5]+1900,
 $l[2],$l[1],$l[0], $s,$d/60,$d%60);

($version)=@ARGV;
chop($arch=`dpkg --print-architecture`);

open(Z,"debian.Changelog");
while(<Z>) { $changes.=$_; last if m/^ --/; }
close(Z); $changes =~ s/^/ /g; $changes =~ s/^/\n/; $changes =~ s/\n$//;

chdir("..");

while (<STDIN>) {
    s/=a/$arch/g;
    s/=v/$version/g;
    if (m/^ =f:(\S+) (\S+) (\S+)$/) {
        ($file,$sec,$pri)=($1,$2,$3);
        $!=0; chop($md5sum=`md5sum <$file`); $? && die "$file: $? $!";
        $!=0; $size=`ls -l $file`; $? && die "$file: $? $!";
        $size =~ m/^\S+\s+\d+\s+\S+\s+\S+\s+(\d+)\s/ || die "$file: `$size'";
        $size= $1;
        $_= " $md5sum $size $sec $pri $file\n";
    } else {
        s/=c/$changes/ || s/=d/$date/g;
    }
    print || die $!;
}
close(STDOUT) || die $!;