fact-specific configuration for moonshine.yml

application_manifest.rb

# Provide a :rails_env fact
Facter.add(:rails_env) do
  setcode do
    ENV["RAILS_ENV"] || 'production'
  end
end

# Your application manifest
class ApplicationManifest < Moonshine::Manifest
  # Let us use non-symbol keys in the moonshine.yml
  def self.configure(hash)
    __config__.replace(__config__.deep_symbolize_keys.deep_merge(hash.deep_symbolize_keys))
  end

  # Perform fact-specific overrides
  if configuration[:overrides].respond_to?(:each)
    configuration[:overrides].each do |key, overrides|
      if override = overrides[Facter.value(key).to_sym] rescue nil
        configure(override)
      end
    end
  end

  # ...
end

moonshine.yml

scout:
  agent_key: "c16edcd4-12e5-4e08-a58f-6a2b3c9d97ff"

overrides:
  fqdn:
    srv1.hosting.com:
      scout:
        agent_key: "9c72ba1e-fa7c-497e-833a-4af85ca239c5"
    srv2.hosting.com:
      scout:
        agent_key: "71a4ee91-15e0-4b16-88a9-4713f61afb03"
  rails_env:
    staging:
      mysql:
        innodb_buffer_pool_size: 32M