#!/usr/bin/perl -w


### set initial variables

$user            = '<USERNAME>';
$host            = '<IP/HOSTNAME>';
$priv_key        = '</KEY/DIR/FILE>';
$remote_dir      = "<REMOTEDIR>";
$source_dir      = '<SOURCEDIR>';
$log_dir         = '<LOGDIR>';

### set system commands/configs/flags

my $rm_cmd       = '/bin/rm -rf';
my $touch_cmd    = '/bin/touch';
my $ssh_cmd      = '/usr/bin/ssh -i';
my $DEBUG        = 2;

### set rsync commands/flags

my $rsync_cmd    = '/usr/bin/rsync -Pav -e';
my $del_flag     = "--remove-source-files";


### set file names/extensions

my $semaphore    = "rsync_running.lock";
my $log_file     = "rsync.output.log";
my $file_ext     = "*.gz";


sub filesize {

    use File::Find;

    find( sub { -f and ( $size += -s ) }, $source_dir );
    $size = sprintf( "%.02f", $size / 1024 / 1024 );
    open STDOUT, ">> $log_dir/$log_file" or die "$0: open: $!";
    open STDERR, ">>& STDOUT" or die "$0: dup: $!";

    print "Directory '$source_dir' contains $size MB\n";

}

sub getLoggingTime {

    ( $sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst ) =
      gmtime(time);
    $nice_timestamp = sprintf(
        "%04d%02d%02d %02d:%02d:%02d",
        $year + 1900,
        $mon + 1, $mday, $hour, $min, $sec
    );

    return $nice_timestamp;

}

sub rsyncfiles {

    if ( -f "$source_dir/$semaphore" ) {
        print "Rsync running, skipping this session.\n" if ( $DEBUG > 2 );

    }

    else {

system("$touch_cmd $source_dir/$semaphore");

        my $push_cmd =
"$rsync_cmd \"$ssh_cmd $priv_key\" $del_flag $source_dir/$file_ext $user\@$host:$remote_dir";
                print "Running: $push_cmd\n" if ( $DEBUG > 1 );
                my $return = system($push_cmd);
                if ($return) {
                    print "rsync failed";
                }
            }
        system("$rm_cmd $source_dir/$semaphore");
    }


@timeData  = gmtime(time);
my $timestamp = getLoggingTime();

open STDOUT, ">> $log_dir/$log_file" or die "$0: open: $!";
open STDERR, ">>& STDOUT" or die "$0: dup: $!";

print "The script ran at $timestamp \n";

&filesize;
&getLoggingTime;
&rsyncfiles;