class ObjectifiedEnvironments::EnvironmentBuilder
Public Class Methods
new(data_provider)
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# File lib/objectified_environments/environment_builder.rb, line 5 def initialize(data_provider) @rails_env = normalize(data_provider.rails_env) @user_name = normalize(data_provider.user_name) @host_name = normalize(data_provider.host_name) raise ArgumentError, "@rails_env is required: #{rails_env.inspect}" unless @rails_env && @rails_env.strip.length > 0 end
Public Instance Methods
environment()
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# File lib/objectified_environments/environment_builder.rb, line 13 def environment candidate_names = [ ] candidate_names << class_name_for_candidate(@rails_env, @user_name, @host_name) if @user_name && @host_name candidate_names << class_name_for_candidate(@rails_env, nil, @host_name) if @host_name candidate_names << class_name_for_candidate(@rails_env, @user_name, @nil) if @user_name candidate_names << class_name_for_candidate(@rails_env, nil, nil) raise "This should be impossible: we should always have a candidate" unless candidate_names.length > 0 out = nil candidate_names.each do |candidate_name| klass = begin candidate_name.constantize rescue NameError nil end return instantiate_from_class(klass) if klass end no_environment_found!(candidate_names) end
Private Instance Methods
class_name_for_candidate(rails_env, user_name, host_name)
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# File lib/objectified_environments/environment_builder.rb, line 42 def class_name_for_candidate(rails_env, user_name, host_name) rails_env = normalize(rails_env) user_name = normalize(user_name) host_name = normalize(host_name) if user_name && host_name target = "#{user_name}_#{host_name}_#{rails_env}" "Objenv::UserHost::#{target.camelize}" elsif host_name target = "#{host_name}_#{rails_env}" "Objenv::Host::#{target.camelize}" elsif user_name target = "#{user_name}_#{rails_env}" "Objenv::User::#{target.camelize}" else "Objenv::#{rails_env.camelize}" end end
instantiate_from_class(klass)
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# File lib/objectified_environments/environment_builder.rb, line 61 def instantiate_from_class(klass) begin constructor = klass.instance_method(:initialize) args = [ ] if constructor.arity != 0 args = [ { :rails_env => @rails_env, :user_name => @user_name, :host_name => @host_name } ] end return klass.new(*args) rescue => e raise ObjectifiedEnvironments::UnableToInstantiateEnvironmentError, %{We found a valid objectified environment class '#{klass.name}', but, when we tried to instantiate it, we got the following exception: #{e.class.name}: #{e.message} #{e.backtrace.join("\n")}} end end
no_environment_found!(candidate_names)
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# File lib/objectified_environments/environment_builder.rb, line 80 def no_environment_found!(candidate_names) raise ObjectifiedEnvironments::EnvironmentMissingError, %{No ObjectifiedEnvironment definition was found. Rails.env: #{@rails_env.inspect} Username: #{@user_name.inspect} Host name: #{@host_name.inspect} This caused us to look for any environment named one of these (in order): #{candidate_names.join("\n")} ...but none of those exist. You may want to run 'rails generate objectified_environments'. } end
normalize(s)
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# File lib/objectified_environments/environment_builder.rb, line 38 def normalize(s) s.strip unless (!s) || (s.strip.length == 0) end