RubyFly

Wraps the concourse fly CLI so that fly can be invoked from a Ruby script or Rakefile.

Add this line to your application's Gemfile:

gem 'ruby_fly'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ruby_fly

RubyFly needs to know where the fly binary is located before it can do anything. By default, RubyFly looks on the path however this can be configured with:

RubyFly.configure do |config|
  config.binary = 'vendor/fly/bin/fly'
end

In addition, each command takes a binary keyword argument at initialisation that overrides the global configuration value.

Currently the library doesn't support logging in to a Concourse instance so if the target instance requires authentication, a session must be manually established before any commands are executed. If there are recommendations for a good approach to automatic login, please raise an issue or a pull request.

Currently, there is partial support for the following commands:

• RubyFly::Commands::GetPipeline: fetches the current configuration of a pipeline from a target Concourse (fly get-pipeline)
• RubyFly::Commands::SetPipeline: submits a pipeline configuration to a target Concourse (fly set-pipeline)
• RubyFly::Commands::UnpausePipeline: unpauses a pipeline on a target Concourse (fly unpause-pipeline)
• RubyFly::Commands::Version: returns the version of the fly binary

The get-pipeline command can be called in the following ways:

RubyFly.get_pipeline(
    target: 'supercorp-ci', 
    pipeline: 'supercorp-service')
RubyFly::Commands::GetPipeline.new.execute(
    target: 'supercorp-ci',
    pipeline: 'supercorp-service')

The get-pipeline command supports the following options passed as keyword arguments (as in the example above):

• target: the Concourse instance to target
• pipeline: the pipeline for which to get configuration

The set-pipeline command can be called in the following ways:

RubyFly.set_pipeline(
    target: 'supercorp-ci', 
    pipeline: 'supercorp-service',
    config: 'ci/pipeline.yml')
RubyFly::Commands::SetPipeline.new.execute(
    target: 'supercorp-ci',
    pipeline: 'supercorp-service',
    config: 'ci/pipeline.yml')

The set-pipeline command supports the following options passed as keyword arguments (as in the example above):

• target: the Concourse instance to target
• pipeline: the pipeline for which to set configuration
• config: the local file containing the pipeline configuration
• vars: an hash of variables to be accessible as interpolations
• var_files: an array of paths to files containing variables to be accessible as interpolations
• non_interactive: if false, any missing variables will be prompted for, if true, any missing variables will cause the command to fail

The unpause-pipeline command can be called in the following ways:

RubyFly.unpause_pipeline(
    target: 'supercorp-ci', 
    pipeline: 'supercorp-service')
RubyFly::Commands::UnpausePipeline.new.execute(
    target: 'supercorp-ci',
    pipeline: 'supercorp-service')

The get-pipeline command supports the following options passed as keyword arguments (as in the example above):

• target: the Concourse instance to target
• pipeline: the pipeline to unpause

The version command can be called in the following ways:

version = RubyFly.version
version = RubyFly::Commands::Version.new.execute

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. 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. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

To encrypt a GPG key for use by CircleCI:

openssl aes-256-cbc \
  -e \
  -md sha1 \
  -in ./config/secrets/ci/gpg.private \
  -out ./.circleci/gpg.private.enc \
  -k "<passphrase>"

To check decryption is working correctly:

openssl aes-256-cbc \
  -d \
  -md sha1 \
  -in ./.circleci/gpg.private.enc \
  -k "<passphrase>"

Bug reports and pull requests are welcome on GitHub at https://github.com/infrablocks/ruby_fly. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

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