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+///
+///  - dutree -
+/// 
+/// Simple command to analyse disk usage from the terminal
+///
+/// Usage:
+///  btrfs-sync [options] <src> [<src>...] [[user@]host:]<dir>
+///
+///  -k|--keep NUM     keep only last <NUM> sync'ed snapshots
+///  -d|--delete       delete snapshots in <dst> that don't exist in <src>
+///  -z|--xz           use xz     compression. Saves bandwidth, but uses one CPU
+///  -Z|--pbzip2       use pbzip2 compression. Saves bandwidth, but uses all CPUs
+///  -q|--quiet        don't display progress
+///  -v|--verbose      display more information
+///  -h|--help         show usage
+///
+/// <src> can either be a single snapshot, or a folder containing snapshots
+/// <user> requires privileged permissions at <host> for the 'btrfs' command
+///
+/// Cron example: daily synchronization over the internet, keep only last 50
+///
+/// cat > /etc/cron.daily/btrfs-sync <<EOF
+/// #!/bin/bash
+/// /usr/local/sbin/btrfs-sync -q -k50 -z /home user@host:/path/to/snaps
+/// EOF
+/// chmod +x /etc/cron.daily/btrfs-sync
+///
+/// Copyleft 2018 by Ignacio Nunez Hernanz <nacho _a_t_ ownyourbits _d_o_t_ com>
+/// GPL licensed (see end of file) * Use at your own risk!
+///
+/// More at https://ownyourbits.com
+///
+
+extern crate dutree;
+
+use dutree::Config;
+use dutree::XResult::XErr;
+use dutree::XResult::XOk;
+use dutree::XResult::XExit;
+use std::process;
+
+fn main() {
+    // Parse arguments
+    let cfg = match Config::new() {
+        XOk(cfg)  => cfg,
+        XExit     => process::exit(0),
+        XErr(err) => {
+            eprintln!( "{}", err );
+            process::exit(1) 
+        }
+    };
+
+    // Execution
+    dutree::run( &cfg );
+}
+
+// License
+//
+// This script 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 script 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.
+//
+// You should have received a copy of the GNU General Public License
+// along with this script; if not, write to the
+// Free Software Foundation, Inc., 59 Temple Place, Suite 330,