perl-MooseX-Attribute-ENV
Set default of an attribute to a value from %ENV
This is a Moose attribute trait that you use when you want the default value for an attribute to be populated from the %ENV hash. So, for example if you have set the environment variable USERNAME = 'John' you can do: package MyApp::MyClass; use Moose; use MooseX::Attribute::ENV; has 'username' =>(is=>'ro', traits=>['ENV']); package main; my $myclass = MyApp::MyClass->new(); print $myclass->username; # STDOUT =>'John'; This is basically similar functionality to something like: has 'attr' =>( is=>'ro', default=>sub { $ENV{uc 'attr'}; }, ); but this module has a few other features that offer merit, as well as being a simple enough attribute trait that I hope it can serve as a learning tool. If the named key isn't found in %ENV, then defaults will execute as normal.
Artistic-1.0 or GPL-1.0+