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#!/usr/bin/perl
#
# ex3: simple use of Config::Validator with Getopt::Long and Config::General
#
# compared to ex1:
# - the --config option has been added
# - configuration can come both from a file and from the command line
#
# $ perl ex3.pl -h
# $ perl ex3.pl --src-host foo --dst-host bar
# $ perl ex3.pl --src-host foo --config ex3-cfg1
#
use strict;
use warnings;
use Config::General qw(ParseConfig);
use Config::Validator qw();
use Data::Dumper qw(Dumper);
use Getopt::Long qw(GetOptions);
our($Validator, @Options, %Config, @Tmp, %Tmp);
$Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1;
$Validator = Config::Validator->new({
type => "struct",
fields => {
"debug" => { type => "integer", optional => "true" },
"dst-port" => {
type => "integer",
min => 0,
max => 65535,
optional => "true",
},
"dst-host" => { type => "string", match => qr/^[\w\-\.]+$/ },
"src-port" => {
type => "integer",
min => 0,
max => 65535,
optional => "true",
},
"src-host" => { type => "string", match => qr/^[\w\-\.]+$/ },
},
});
@Options = sort($Validator->options(), "config=s", "help|h|?");
# first step: parse the command line options to handle options like --help or --config
@Tmp = @ARGV;
GetOptions(\%Tmp, @Options) or die;
if ($Tmp{help}) {
printf("Options:%s\n", join("\n --", "", @Options));
exit(0);
}
# second step: handle the --config option
if ($Tmp{config}) {
%Config = ParseConfig(-ConfigFile => $Tmp{config});
# parse again the command line options using defaults read from the file
@ARGV = @Tmp;
GetOptions(\%Config, @Options) or die;
delete($Config{config});
} else {
%Config = %Tmp;
}
$Validator->validate(\%Config);
print(Dumper(\%Config));
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