#!/usr/bin/perl

# TODO: skip-if-exists (and ignore zero byte files)
# TODO: continue-on-errors
# Error doing restore: File restore/.brackup-digest.db (.brackup-digest.db) already exists.  Aborting. at /raid/bradfitz/proj/brackup/trunk/lib/Brackup/Restore.pm line 157, <$fh> line 20.

=head1 NAME

brackup-restore - The brackup restore tool.

=head1 SYNOPSIS

 $ brackup-restore --from=foo.brackup --to=<base_directory> --all
 $ brackup-restore --from=foo.brackup --to=<base_directory> --just=<file>
 $ brackup-restore --from=foo.brackup --to=<base_directory> --just=<dir>

=head2 OPTIONS

=over 4

=item --from=NAME

Required.  The metafile index.  Probably named like "source-YYYYMMDD.brackup"

=item --to=NAME

Required.  The destination root directory for your restored files.

=item --all

Restore all files.

=item --just="DIRECTORY"

Restore just the directory named.  (and all contents thereunder)

=item --just="FILE"

Restore just the file named.

=back

=head1 WARRANTY

Brackup is distributed as-is and comes without warranty of any kind.
It'll probably eat your files, kick your cat, and knock up your
mother.  You've been warned.  If you feel like trusting it with your
data, why don't you audit it first?

=head1 AUTHOR

Brad Fitzpatrick E<lt>brad@danga.comE<gt>

Copyright (c) 2006 Six Apart, Ltd. All rights reserved.

This module is free software. You may use, modify, and/or redistribute this
software under the terms of same terms as perl itself.

=cut

use strict;
use warnings;
use Getopt::Long;

use FindBin qw($Bin);
use lib "$Bin/lib";

use Brackup;

my ($opt_verbose, $meta_file, $opt_help, $restore_dir, $opt_all, $prefix);

my $config_file = Brackup::Config->default_config_file_name;

usage() unless
    GetOptions(
               'from=s'    => \$meta_file,
               'to=s'      => \$restore_dir,
               'verbose'   => \$opt_verbose,
               'help'      => \$opt_help,
               'all'       => \$opt_all,
               'just=s'    => \$prefix,
               'config=s'  => \$config_file,
               );

if ($opt_help) {
    eval "use Pod::Usage;";
    Pod::Usage::pod2usage( -verbose => 1, -exitval => 0 );
    exit 0;
}

my $config = eval { Brackup::Config->load($config_file) } or
    usage($@);

usage() unless $meta_file && $restore_dir && ($prefix || $opt_all);
usage("Given directory isn't a directory") unless -d $restore_dir;
usage("Given restore file doesn't exist")  unless -e $meta_file;
usage("Given restore file isn't a file")   unless -f $meta_file;
$prefix ||= "";  # with -all, "", which means everything

my $restore = Brackup::Restore->new(
                                    to     => $restore_dir,
                                    prefix => $prefix,
                                    file   => $meta_file,
                                    );

if (eval { $restore->restore }){
    warn "Restore complete." if $opt_verbose;
    exit 0;
} else {
    warn "Error doing restore: $@\n";
    exit 1;
}


sub usage {
    my $why = shift || "";
    if ($why) {
        $why =~ s/\s+$//;
        $why = "Error: $why\n\n";
    }
    die "${why}brackup-restore --from=[metafile.brackup] --to=[restore_dir] <--all|--just=[what]>\nbrackup-restore --help\n";

}