Nerv - Environment Variables for Humans. Ruby Edition!

Nerv is a tiny gem, inspired by @kennethreitz env. So, it provides a mapping interface for Environment Variables, too.

Installation

Add this line to your application's Gemfile:

gem 'nerv'

And then execute:

$ bundle

Or install it yourself as:

$ gem install nerv

Let's assume that we have ENV like this:

ENV = {
  'RUBY_FREE_MIN' => 0,
  'RUBY_GC_MALLOC_LIMIT' => 0,
  'RBENV_SOME' => 0,
  'ZSH-HOME' => 0
}

ruby_env = Nerv.prefix('RUBY')
# ruby_env == { 'FREE_MIN' => 0, 'GC_MALLOC_LIMIT' => 0 }

Nerv.prefix has the second optional argument — a separator for ENV 'namespaces':

ruby_env = Nerv.prefix('ZSH', '-')
# ruby_env == { 'FREE_MIN' => 0, 'GC_MALLOC_LIMIT' => 0 }

Also, there is a shorthand for Nerv.prefix with default separator:

ruby_env = Nerv['RUBY']
# ruby_env == { 'FREE_MIN' => 0, 'GC_MALLOC_LIMIT' => 0 }