#!/usr/local/bin/perl -w
#-*- perl -*-
#
# Copyright (C) 2000-2001 Ken'ichi Fukamachi
#          All rights reserved. 
#
# $Id$ 
# $FML$
#

use vars qw($MainCF);
use strict;
use Carp;
use Getopt::Long;

# main configuration file for directory switch
$MainCF = '/etc/fml/main.cf';

eval { &Bootstrap();};
if ($@) { print STDERR "Error: ", $@, "\n";}

exit 0;


# Firstly we load Standalone.pm which has main.cf parser().
BEGIN {
    use File::Basename;
    unshift(@INC, dirname($0));
    require Standalone;
}


# Descriptions: top lebel bootstrap program
#               which load the required library and switch myself to it.
#               loading order: 
#               libexec/fmlwrapper -> libexec/fml -> FML::Process::Something
#    Arguments: none
# Side Effects: switch to the real process
# Return Value: none
sub Bootstrap
{
    # 1. main.cf exists and I can open it?
    -f $MainCF   || die("cannot find ${MainCF}");
    my $fh = new FileHandle $MainCF;
    defined($fh) || die("cannot find ${MainCF}");

    # 2. pick up *.cf files to read and set them to @cf.
    #    We pass it to fml_loader.
    # pass *.cf files to libexec/{distribute,command}
    # for example
    # @cf = ( /etc/fml/defaults/$VERSION/default_config.cf 
    #         /etc/fml/domains/$DOMAIN/config.cf
    #         /var/spool/ml/elena/config.cf
    #        );
    my @cf      = ();
    my %options = ();
    my $my_default_config = '';
    GetOptions(\%options, 
	       qw(ctladdr! debug! params! -c=s)
	       );

    for (@ARGV) {
	if (-d $_) {
	    push(@cf, "$_/config.cf") if -f "$_/config.cf";
	}
	elsif (-f $_) {
	    push(@cf, $_);
	}
    }

    # 2.1 o.k. try to load main.cf
    my $main_cf        = Standalone::load_cf($options{'c'} || $MainCF,
					     $options{'params'}
					     );
    my $libexec_dir    = $main_cf->{ libexec_dir };
    my $default_config = $my_default_config || $main_cf->{ default_config };
    unshift(@cf, $default_config);

    # 3. reset @INC
    unshift(@INC, $main_cf->{ local_lib_dir }) if $main_cf->{ local_lib_dir };
    unshift(@INC, $main_cf->{ lib_dir })       if $main_cf->{ lib_dir };

    # 4. inspect my mode from $0
    use File::Basename;
    my $myname = basename($0);

    # 5. o.k. here we go!
    require "$libexec_dir/fml";
    ProcessSwitch( 
		  {
		      cf_list      => \@cf,
		      myname       => $myname,
		      options      => \%options,
		  });
}


=head1 NAME

fmlwrapper -- the wrapper which executes a real fml5 program.

=head1 SYNOPSIS

fmlwrapper C<[-c main.cf]> C<[--debug]> C<[--ctladdr]> ml_home_dir

=head1 DESCRIPTION

C<-c main.cf>
    main.cf alternative

C<--debug>
    debug on.

C<--ctladdr> 
    execute fml/libexec/command.

C<--params> 
    --params 'key1=value1 key2=value2 ...'

=cut