#!/usr/bin/perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html

package xCAT::RSYNC;
# cannot use strict
use base xCAT::DSHRemoteShell;

# Determine if OS is AIX or Linux
# Configure standard locations of commands based on OS

if ( $^O eq 'aix' ) {
	our $RSYNC_CMD = '/usr/bin/rsync';
}

if ( $^O eq 'linux' ) {
	our $RSYNC_CMD = '/usr/bin/rsync';
}


=head3
        remote_copy_command

        This routine constructs an rsync remote copy command using the
        given arguments

        Arguments:
        	$class - Calling module name (discarded)
        	$config - Reference to copy command configuration hash table
        	$exec_path - Path to rsync executable

        Returns:
        	A command array for the rsync command with the appropriate
        	arguments as defined in the $config hash table
                
        Globals:
        	None
    
        Error:
        	None        	
    
        Example:
        	xCAT::RSYNC->remote_copy_command($config_hash, '/usr/bin/rsync');

        Comments:
        	$config hash table contents:
        	
        		$config{'dest-file'} - path to file on destination host
        		$config{'dest-host'} - destination hostname where file will be copied
        		$config{'dest-user'} - user ID of destination host
        		$config{'options'} - custom options string to include in scp command
        		$config{'preserve'} - configure the preserve attributes on scp command
        		$config{'recursive'} - configure the recursive option on scp command        	
        		$config{'src-file'} - path to file on source host
        		$config{'src-host'} - hostname where source file is located
        		$config{'src-user'} - user ID of source host

=cut

sub remote_copy_command {
	my ( $class, $config, $exec_path ) = @_;

	$exec_path || ( $exec_path = $RSYNC_CMD );

	my @command   = ();

        if($$config{'destDir_srcFile'}){

                my $rsync_opt;
                $sync_opt = '-L ';
                $sync_opt .= '-p -t ' if $$config{'preserve'};
                $sync_opt .= '-r ' if $$config{'recursive'};
                $sync_opt .= $$config{'options'};

                open RSCYCCMDFILE, "> /tmp/rsync_$$config{'dest-host'}"
                        or die "Can not open file /tmp/rsync_$$config{'dest-host'}";
                my $dest_dir_list = join ' ', keys %{$$config{'destDir_srcFile'}};
                my $dest_user_host = $$config{'dest-host'};
                if($$config{'dest-user'}){
                        $dest_user_host = "$$config{'dest-user'}@" . "$$config{'dest-host'}";
                }
                print RSCYCCMDFILE "/opt/csm/bin/dsh -n $dest_user_host '/bin/mkdir -p $dest_dir_list'\n";

                foreach my $dest_dir (keys %{$$config{'destDir_srcFile'}}){
                        my @src_file = @{$$config{'destDir_srcFile'}{$dest_dir}{'same_dest_name'}};
                        @src_file = map{ $_ if -e $_; } @src_file;
                        my $src_file_list = join ' ' , @src_file;
                        if($src_file_list){
                                print RSCYCCMDFILE "$exec_path $sync_opt $src_file_list $dest_user_host:$dest_dir\n";
                        }
                        my %diff_dest_hash = %{$$config{'destDir_srcFile'}{$dest_dir}{'diff_dest_name'}};
                        foreach my $src_file_diff_dest ( keys %diff_dest_hash){
                                next  if !-e $src_file_diff_dest;
                                my $diff_basename = $diff_dest_hash{$src_file_diff_dest};
                                print RSCYCCMDFILE "$exec_path $sync_opt $src_file_diff_dest $dest_user_host:$dest_dir/$diff_basename\n";
                        }

                }
                print RSCYCCMDFILE "/bin/rm -f /tmp/rsync_$$config{'dest-host'}\n";
                close RSCYCCMDFILE;
                chmod 0755, "/tmp/rsync_$$config{'dest-host'}";
                @command = ('/bin/sh','-c',"/tmp/rsync_$$config{'dest-host'}");

        }
	else{
		my @src_files = ();
		my @dest_file = ();

		my @src_file_list = split $::__DCP_DELIM, $$config{'src-file'};

		foreach $src_file (@src_file_list) {
			my @src_path = ();
			$$config{'src-user'} && push @src_path, "$$config{'src-user'}@";
			$$config{'src-host'} && push @src_path, "$$config{'src-host'}:";
			$$config{'src-file'} && push @src_path, $src_file;
			push @src_files, ( join '', @src_path );
		}

		$$config{'dest-user'} && push @dest_file, "$$config{'dest-user'}@";
		$$config{'dest-host'} && push @dest_file, "$$config{'dest-host'}:";
		$$config{'dest-file'} && push @dest_file, $$config{'dest-file'};

		push @command, $exec_path;
		$$config{'preserve'} && push @command, ( '-p', '-t' );
		$$config{'recursive'} && push @command, '-r';

		if ( $$config{'options'} ) {
			my @options = split ' ', $$config{'options'};
			push @command, @options;
		}

		push @command, @src_files;
		push @command, ( join '', @dest_file );
	
	}

	return @command;
}

1;