module Getenv

A simple wrapper around `ENV` that makes working with environment variables a bit cleaner.

@example Getting a variable

Getenv.HOME #=> "/Users/erlend"
Getenv.LANG #=> "en_US.UTF-8"

@example Setting a variable

Getenv.LANG = "nb_NO.UTF-8" #=> "nb_NO.UTF-8"
Getenv.LANG                 #=> "nb_NO.UTF-8"

@example Check if a variable is set

Getenv.LANG?   #=> true
Getenv.NOTHING #=> false

@example Getting a variable or raise error if missing

Getenv.LANG!    #=> "en_US.UTF-8"
Getenv.NOTHING! #=> raises Getenv::Error (key not found `NOTHING`)

Public Class Methods

method_missing(meth, value = nil) click to toggle source

Calls superclass method

# File getenv.rb, line 26
def method_missing(meth, value = nil)
  key = meth.to_s
  suffix = key[-1]
  key = key[0..-2] if %w[? = !].include?(suffix)

  case suffix
  when '?' then ENV.key?(key)
  when '=' then ENV[key] = value
  when '!' then ENV.fetch(key) { raise Error, "key not found `#{key}`" }
  else
    key ? ENV[key] : super
  end
end

respond_to_missing?(*) click to toggle source

Make {#respond_to?} always return true

# File getenv.rb, line 42
def respond_to_missing?(*)
  true
end