= Whenever

Whenever is a ruby gem that provides a ruby syntax for defining cron jobs. It was designed to work well with Rails applications, but can be used independently as well.

== Installation

To install Whenever in a Rails (2.1 or greater) application:
  
in your "config/environment.rb" file:

  Rails::Initializer.run do |config|
    config.gem 'javan-whenever', :lib => 'whenever', :source => 'http://gems.github.com'
  end
  
To install this gem (and all other missing gem dependencies), run rake gems:install (use sudo if necessary).

In older versions of Rails:

$ gem sources -a http://gems.github.com
$ gem install whenever

in your "config/environment.rb" file:

  Rails::Initializer.run do |config|
    ...
  end

  require "whenever"
  
== Getting started

$ cd /my/rails/app
$ wheneverize .

This will create an initial "config/schedule.rb" file you.

== Example schedule.rb file

  set :runner_path, '/var/www/apps/my_app' # Whenever will try to use your RAILS_ROOT if this isn't set
  set :runner_environment, :production # Whenever defaults to production so only set this if you want to use a different environment.
  set :cron_log, '/path/to/my/cronlog.log' # Where to log (this should NOT be your Rails log)


  every 2.hours do
    runner "MyModel.some_process" # runners are the script/runners you know and love
    command "/usr/local/bin/my_great_command" # commands are any unix command
  end

  every 1.day, :at => '4:30 am' do # If not :at option is set these jobs will run at midnight
    runner "DB.Backup", :cron_log => false # You can specify false for no logging or a string a different log file to override logging.
  end

  every :hour do # Many shortcuts available: :hour, :day, :month, :year, :reboot
    runner "SomeModel.ladeda"
  end

  every :sunday do # Use any day of the week or :weekend, :weekday 
    runner "Task.do_something_great"
  end
  
== Cron output

$ cd /my/rails/app
$ whenever

And you'll see your schedule.rb converted to cron sytax

== Capistrano integration

Use the "whenever:write_cron" task to automatically write your crontab file with each deploy.

in your "config/deploy.rb" file do something like:

  after "deploy:symlink", "whenever:write_cron"
  
THIS WILL COMPLETELY OVERWRITE ANY EXISTING CRONTAB ENTRIES!
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Better documentation on the way!