Welcome to the future!
<% end %> The code between do .. end will only run if the strategy for 'time_machine' allows launching to current_user. You can also use it in a controller: def index trebuchet.launch('time_machine') do @time_machine = TimeMachine.new end end Custom Strategies ----------------- Trebuchet ships with a number of default strategies but you can also define your own custom strategies like so: Trebuchet.define_strategy(:admins) do |user| !!(user && user.has_role?(:admin)) end controller.current_user is yielded to the block and it should return true for users you want to launch to. You can use parameters with custom strategies too: Trebuchet.define_strategy(:markets) do |user, markets| markets.include?(user.market) end Like parameters for builtin strategies, these can be changed while the application is running. For example: Trebuchet.aim('time_machine', :markets, ['San Francisco', 'New York City']) When using Trebuchet together with Rails, a good place to define custom strategies is in an initializer. Visitor Strategy ---------------- Trebuchet can be used to launch to visitors (no user object present). First, set the visitor id either directly (in a before filter) or as a proc: Trebuchet.visitor_id = 123 Trebuchet.visitor_id = proc { |request| request && request.cookies[:visitor] && request.cookies[:visitor].hash } If you're using a proc, Trebuchet passes in the request object. It expects that the proc returns an integer. If it returns anything else, Trebuchet will not launch. Fiber and Thread Safety ------------- Trebuchet stores global state such as `Trebuchet.current` which is thread and fiber unsafe behavior. In order to use these features in a fiber or threaded environment, `Trebuchet.threadsafe_state = true` will cause Trebuchet to store these values in a thread-local state object instead. This is not the default for backward compatability reasons. ================================================ FILE: Rakefile ================================================ require 'bundler' Bundler::GemHelper.install_tasks task :spec do system 'rspec ./spec' end task :default => :spec ================================================ FILE: app/controllers/trebuchet_rails/features_controller.rb ================================================ module TrebuchetRails class FeaturesController < ApplicationController if Rails::VERSION::MAJOR >= 5 before_action :control_access, :get_time_zone else before_filter :control_access, :get_time_zone end layout 'trebuchet' helper :trebuchet def index @features = Trebuchet::Feature.all @features.sort! {|x,y| x.name.downcase <=> y.name.downcase } @dismantled_features = Trebuchet::Feature.dismantled @dismantled_features.sort! {|x,y| x.name.downcase <=> y.name.downcase } respond_to do |wants| wants.html # index.html.erb wants.json { render :json => @features.map(&:export) } end end def timeline @history = [] Trebuchet::Feature.all.each do |f| f.history.each do |timestamp, strategy| @history << { :feature_name => f.name, :timestamp => timestamp, :strategy => strategy } end end @history = @history.sort_by { |h| h[:timestamp] } @history.reverse! respond_to do |wants| wants.html # index.html.erb wants.json do json_history = @history.map do |history| history.tap { |h| h[:strategy] = h[:strategy].export } end render :json => json_history end end end private def control_access allowed = if Trebuchet.admin_view.is_a?(Proc) begin instance_eval &(Trebuchet.admin_view) rescue false end else !!Trebuchet.admin_view end raise ActionController::RoutingError.new('Not Found') unless allowed end def get_time_zone @zone = if Trebuchet.time_zone if Trebuchet.time_zone.is_a?(Proc) Trebuchet.time_zone.call elsif Trebuchet.time_zone.is_a?(String) Trebuchet.time_zone else nil end end @zone = ActiveSupport::TimeZone.new(@zone || 'UTC') end end end ================================================ FILE: app/helpers/trebuchet_helper.rb ================================================ module TrebuchetHelper def feature(feature) "| Feature Name | Launch Strategy | Strategy History |
|---|---|---|
| <%= feature.name %> | <%= strategy feature.strategy %> | <% if has_history %>History | <% end %>
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||
| Dismantled Features | Strategy History |
|---|---|
| <%= feature.name %> | <% if has_history %>History | <% end %>
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| Timestamp | Feature Name | Launch Strategy |
|---|---|---|
| <%= @zone.at(h[:timestamp].to_i).strftime("%x %X %Z") %> | <%= h[:feature_name] %> | <%= strategy h[:strategy] %> |