I18n Env Var Lookup

Provides a backend to the i18n gem to allow a definition to contain embedded references to environment variables by introducing the special embedded marker ~{}.

All definitions are lazily evaluated on lookup, and once compiled they're written back to the translation store so that all interpolation happens once.

# .env
APP_NAME=An International App

# example.yml
home:
  index:
    seo_title: Home | ~{APP_NAME}

<%= t '.seo_title' %> will correctly evaluate to Home | An International App.

Use double tildes to escape. e.g. ~~{APP_NAME}

Install the gem either by putting it in your Gemfile

gem 'i18n-env-var-lookup'

or by installing it using rubygems

gem install i18n-env-var-lookup

Add it to your existing backend by adding these lines to your config/initializers/i18n.rb (create one if one doesn't exist):

# config/initializers/i18n.rb
require 'i18n/backend/env_var_lookup'
I18n::Backend::Simple.send(:include, I18n::Backend::EnvVarLookup)

Of course you can replace the I18n::Backend::Simple with whatever backend you wish to use.

This gem is heavily inspired by the i18n-recursive-lookup gem