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#!/usr/bin/perl
#
# ex4: advanced use of Config::Validator with Getopt::Long and Config::General
#
# this is somehow a merge of ex2 and ex3
#
# $ perl ex4.pl -h
# $ perl ex4.pl -d -d --src-host foo --dst-host bar --dst-port 80
# $ perl ex4.pl --src-host foo --config ex4-cfg1
#
use strict;
use warnings;
use Config::General qw(ParseConfig);
use Config::Validator qw(treeify);
use Data::Dumper qw(Dumper);
use Getopt::Long qw(GetOptions);
our($Validator, @Options, %Config, @Tmp, %Tmp);
$Data::Dumper::Indent = 1;
$Data::Dumper::Sortkeys = 1;
$Validator = Config::Validator->new(
svc => {
type => "struct",
fields => {
port => {
type => "integer",
min => 0,
max => 65535,
optional => "true",
},
host => { type => "string", match => qr/^[\w\-\.]+$/ },
},
},
cfg => {
type => "struct",
fields => {
debug => { type => "integer", optional => "true" },
dst => { type => "valid(svc)" },
src => { type => "valid(svc)" },
},
},
);
@Options = sort($Validator->options("cfg"), "config=s", "help|h|?");
foreach my $option (@Options) {
$option =~ s/^debug.*$/debug|d+/;
}
# 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 => $Tmp{config});
treeify(\%Config);
# parse again the command line options using defaults read from the file
@ARGV = @Tmp;
GetOptions(\%Config, @Options) or die;
delete($Config{config});
} else {
%Config = %Tmp;
}
treeify(\%Config);
$Validator->validate(\%Config, "cfg");
print(Dumper(\%Config));
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