在Perl脚本中分离配置数据和脚本逻辑

变量可能是多值时必须小心：如果配置文件中存在单个值,它将以标量存储该值;如果存在多个值,您将获得一个数组引用.

我发现有两个配置文件是方便的：一个用于描述操作环境的值(在哪里可以找到库等),另一个用于用户可修改的行为.

我也想写一个包装纸.例如(更新为包括@R_197_11385@成的只读访问器)：

#!/usr/bin/perl

package My::Config;
use Strict; use warnings;

use Config::Std;
use FindBin qw($Bin);
use File::Spec::Functions qw( catfile );

sub new {
    my $class = shift;
    my ($config_filE) = @_;

    $config_file = catfile($Bin,'config.ini');
    read_config $config_file => my %config;

    my $object = bless \%config => $class;

    $object->gen_accessors(
        single => {
            install => [ qw( root ) ],},multi => {
            template => [ qw( dir ) ],);

    return $object;
}

sub gen_accessors {
    my $config = shift;
    my %args = @_;

    my $class = ref $config;

    {
        no Strict 'refs';
        for my $section ( keys %{ $args{singlE} } ) {
            my @vars = @{ $args{singlE}->{$section} };
            for my $var ( @vars ) {
                *{ "${Class}::${section}_${var}" } = sub {
                    $config->{$section}{$var};
                };
            }
        }

        for my $section ( keys %{ $args{multi} } ) {
            my @vars = @{ $args{multi}->{$section} };
            for my $var ( @vars ) {
                *{ "${Class}::${section}_${var}" } = sub {
                    my $val = $config->{$section}{$var};
                    return [ $val ] unless 'ARRAY' eq ref $val;
                    return $val;
                }
            }
        }
    }

    return;
}

package main;

use Strict; use warnings;

my $config = My::Config->new;

use Data::Dumper;
print Dumper($config->install_root,$config->template_dir);

C:\Temp> cat config.ini
[install]
root = c:\opt

[template]
dir = C:\opt\app\tmpl
dir = C:\opt\common\tmpl

输出：

C:\Temp> g.pl
$VAR1 = 'c:\\opt';
$VAR2 = [
          'C:\\opt\\app\\tmpl','C:\\opt\\common\\tmpl'
        ];