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A simple Gem to add YAML configuration files to your Ruby script / Gem.

Note : While this Gem is fully functional, the API may be subject to changes before hitting version 1.0.0

This Gem allows your Ruby scripts and Gems to save and load its settings to a configuration file in YAML format.


Add this line to your application's Gemfile:

gem 'confoog'

And then execute:

$ bundle

Or install it yourself as:

$ gem install confoog


Very basic usage is as below. For full documentation, see the Confoog Web Site

require 'confoog'

settings =
settings[:var] = value
settings[:array] = [1, 2, 3, 4]
settings[42] = "Meaning of life"
settings[:urls] = ["", ""]

To Do

Thoughts in no particular order.

  • Restrict configuration variables to a specified subset, or to only those that already exist in the YAML file.
  • A better way of dealing with multi-level variables - i.e. nested arrays, hashes etc.
  • Write standalone tests for the 'Status' class - right now it is tested at 100% by the application tests though would probably be good to have dedicated tests too
  • Check Windows compatibility, certainly at least the tests will fail since there are issue with FakeFS on Window. Should be ok as a production Gem though (TBC)
  • Add other file formats for storing config - XML? (Yuk!)
  • Document properly on a dedicated website with full example usage and help.
  • Add an option to use a config file stored in the script directory, if existing, instead of the specified one. Will make developing of Gems and Apps using this a bit easier.
  • Add ability to generate custom error messages (eg if the config file is missing and similar)
  • Add 'transient' options that will not be saved to the YAML file. This allows Confoog to be used for temp variable storage also without making them permanent.


After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests (or simply rake). You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install.

Run rake to run the RSpec tests, which also runs RuboCop, Reek and inch --pedantic too.


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request

Please note - This Gem currently passes 100% on RuboCop, Reek and Inch-CI (on pedantic mode), so all pull requests should do likewise. Ask for guidance if needed. Running rake will automatically test all 3 of those along with the RSpec tests. Note that Failures of Rubocop will cause the CI (Travis) to fail, however 'Reek' failures will not.


This library aims to adhere to Semantic Versioning 2.0.0. Violations of this scheme should be reported as bugs. Specifically, if a minor or patch version is released that breaks backward compatibility, that version should be immediately yanked and/or a new version should be immediately released that restores compatibility. Breaking changes to the public API will only be introduced with new major versions. As a result of this policy, you can (and should) specify a dependency on this gem using the Pessimistic Version Constraint with two digits of precision. For example:

spec.add_dependency 'confoog', '~> 1.0'

Of course, currently we have not even reached version 1, so leave off the version requirement completely. Expect any and all of the API and interface to change!


The gem is available as open source under the terms of the MIT License.

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