Add rake task to clean DB

lib/crono.rb

@@ -11,5 +11,6 @@ require 'crono/scheduler'
 require 'crono/config'
 require 'crono/performer_proxy'
 require 'crono/orm/active_record/crono_job'
+require 'crono/railtie' if defined?(Rails)
 
 Crono.autoload :Web, 'crono/web'

lib/crono/cli.rb

@@ -2,8 +2,6 @@ require 'crono'
 require 'optparse'
 
 module Crono
-  mattr_accessor :scheduler
-
   # Crono::CLI - The main class for the crono daemon exacutable `bin/crono`
   class CLI
     include Singleton

lib/crono/orm/active_record/crono_job.rb

@@ -5,5 +5,9 @@ module Crono
   class CronoJob < ActiveRecord::Base
     self.table_name = 'crono_jobs'
     validates :job_id, presence: true, uniqueness: true
+
+    def self.outdated
+      self
+    end
   end
 end

lib/crono/railtie.rb

@@ -0,0 +1,9 @@
+module Crono
+  class Railtie < ::Rails::Railtie
+    rake_tasks do
+      Dir[File.join(File.dirname(__FILE__), '../tasks/*.rake')].each do |file|
+        load file
+      end
+    end
+  end
+end

lib/crono/scheduler.rb

@@ -22,4 +22,6 @@ module Crono
       jobs.sort_by(&:next)
     end
   end
+
+  mattr_accessor :scheduler
 end

lib/tasks/crono_tasks.rake

@@ -0,0 +1,9 @@
+namespace :crono do
+  desc 'Clean unused job stats from DB'
+  task clean: :environment do
+    Crono.scheduler = Crono::Scheduler.new
+    require File.join(Rails.root, 'config', 'cronotab')
+    current_job_ids = Crono.scheduler.jobs.map(&:job_id)
+    Crono::CronoJob.where.not(job_id: current_job_ids).destroy_all
+  end
+end