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#!/usr/bin/perl -wT
# Copyright (c) 2006 Anthony Towns <ajt@debian.org>
#
# 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.
use strict;
use Fcntl ':flock';
use File::Find;
use POSIX qw(strftime);
# configuration:
my $local_dir = "/srv/ftp.debian.org/mirror";
my $rsync_host = undef; #"merkel.debian.org";
my $rsync_dir = undef; #"debian";
my $dest = "/srv/ftp.debian.org/rsync/typical";
my $max_del = 1000;
$ENV{"PATH"} = "/bin:/usr/bin";
# program
my $hostname = `/bin/hostname -f`;
die "bad hostname" unless $hostname =~ m/^([a-zA-Z0-9._-]+)/;
$hostname = $1;
my $lockfile = "./Archive-Update-in-Progress-$hostname";
unless (open LKFILE, "> $dest/$lockfile" and flock(LKFILE, LOCK_EX)) {
print "$hostname is unable to start sync, lock file exists\n";
exit(1);
}
if (defined $rsync_host && defined $rsync_dir) {
system("rsync --links --hard-links --times --verbose --recursive"
." --delay-updates --files-from :indices/files/typical.files"
." rsync://$rsync_host/$rsync_dir/ $dest/");
} else {
open FILELIST, "< $local_dir/indices/files/typical.files"
or die "typical.files index not found";
while (<FILELIST>) {
chomp;
m/^(.*)$/; $_ = $1;
my @l = lstat("$local_dir/$_");
next unless (@l);
if (-l _) {
my $lpath = readlink("$local_dir/$_");
$lpath =~ m/^(.*)$/; $lpath = $1;
if (-l "$dest/$_") {
next if ($lpath eq readlink("$dest/$_"));
}
unless (mk_dirname_as_dirs($dest, $_)) {
print "E: couldn't create path for $_\n";
next;
}
if (-d "$dest/$_") {
rename "$dest/$_", "$dest/$_.remove" or print "E: couldn't rename old dir $_ out of the way\n";
} elsif (-e "$dest/$_") {
unlink("$dest/$_") or print "E: couldn't unlink $_\n";
}
symlink($lpath, "$dest/$_") or print "E: couldn't create $_ as symlink to $lpath\n";
next;
}
next if (-d _);
unless (mk_dirname_as_dirs($dest, $_)) {
print "E: couldn't create path for $_\n";
next;
}
my @d = lstat("$dest/$_");
if (@d) {
if (-d _) {
rename("$dest/$_", "$dest/$_.remove") or print "E: couldn't rename old dir $_ out of the way\n";
} else {
next if (@l and @d and $l[0] == $d[0] and $l[1] == $d[1]);
#next if (@l and @d and $l[7] == $d[7]);
print "I: updating $_\n";
unlink("$dest/$_");
}
}
link("$local_dir/$_", "$dest/$_") or print "E: couldn't link $_\n";
}
close(FILELIST);
}
print "Files synced, now deleting any unnecessary files\n";
my %expected_files = ();
open FILES, "< $dest/indices/files/typical.files"
or die "typical.files index not found";
while (<FILES>) {
chomp;
$expected_files{$_} = 1;
}
close(FILES);
chdir($dest);
my $del_count = 0;
my $last = '';
finddepth({wanted => \&wanted, no_chdir => 1}, ".");
open TRACE, "> $dest/project/trace/$hostname" or die "couldn't open trace";
print TRACE strftime("%a %b %e %H:%M:%S UTC %Y", gmtime) . "\n";
close TRACE;
close LKFILE;
unlink("$dest/$lockfile");
exit(0);
sub wanted {
my ($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_);
if (-d _) {
if (substr($last, 0, length($_) + 1) ne "$_/") {
print "Deleting empty directory: $_\n";
$_ = m/^(.*)$/;
my $f = $1;
rmdir($f);
} else {
$last = $_;
}
} elsif ($_ =~ m|^\./project/trace/| or $_ eq $lockfile) {
$last = $_;
} elsif (defined $expected_files{$_}) {
$last = $_;
} elsif ($del_count < $max_del) {
$del_count++;
print "Deleting file: $_\n";
$_ = m/^(.*)$/;
my $f = $1;
unlink($f);
}
}
sub mk_dirname_as_dirs {
my ($base, $file) = @_;
while ($file =~ m,^/*([^/]+)/+([^/].*)$,) {
$file = $2;
$base = "$base/$1";
my @blah = lstat($base);
if (!@blah) {
mkdir($base, 0777);
} elsif (-l _ or ! -d _) {
print "SHOULD BE A DIRECTORY: $base\n";
unlink($base);
mkdir($base, 0777);
}
}
1;
}
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