Configlet¶ ↑

• github.com/jbarnette/configlet

A stupid simple wrapper for environment variables.

This doesn’t deserve to be released as a gem, but I’m using it in two different projects. Seriously, go find a real configuration library and use it instead.

require "configlet"

# assuming...
ENV["THUNK_STATUS"]   = "crazy-awesome"
ENV["THUNK_FINISHED"] = "false"

# some bits of optional config
Configlet.prefix = :thunk
Configlet.default :token => "default-token"
Configlet.munge(:finished) { |k| "true" == k }

# grabbin' values
Configlet[:status]   # => "crazy-awesome"
Configlet[:finished] # => false
Configlet[:token]    # => "default-token"

There’s also a block form, which is nice if you’re setting a lot of defaults:

Configlet.config :thunk do
  default :token => "default-token"
  default :host  => "thunk.local"
end

Defaults can be lazy, too: Just use a lambda. The default will be resolved the first time its value is grabbed.

default :db => lambda { "db://whatever/#{Rails.env}" } # or...
default(:db) { "db://whatever/#{Rails.env}" }

Configlet is a module, so include or extend it wherever you want. It extends itself for your convenience.

Want something other than a string? You can munge any value:

default :url => "http://example.org"
munge(:url) { |v| URI.parse v }
Configlet[:url] # => #<URI::HTTP:0xdeadbeef URL:http://example.org>

In fact, there’s a shortcut just for URLs. I haven’t added any others ‘cause I haven’t needed to care:

url :url => "http://example.org"
Configlet[:url] # => #<URI::HTTP:0xcafebabe URL:http://example.org>

$ gem install configlet

Copyright 2010 John Barnette (code@jbarnette.com)

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