Class: Chef::Provider

Inherits:
Object show all
Extended by:
Mixin::ConvertToClassName
Includes:
Mixin::EnforceOwnershipAndPermissions, Mixin::RecipeDefinitionDSLCore, Mixin::WhyRun
Defined in:
lib/chef/provider.rb,
lib/chef/provider/env.rb,
lib/chef/provider/git.rb,
lib/chef/provider/log.rb,
lib/chef/provider/cron.rb,
lib/chef/provider/file.rb,
lib/chef/provider/link.rb,
lib/chef/provider/ohai.rb,
lib/chef/provider/user.rb,
lib/chef/provider/group.rb,
lib/chef/provider/mdadm.rb,
lib/chef/provider/mount.rb,
lib/chef/provider/deploy.rb,
lib/chef/provider/script.rb,
lib/chef/provider/execute.rb,
lib/chef/provider/package.rb,
lib/chef/provider/service.rb,
lib/chef/provider/user/pw.rb,
lib/chef/provider/erl_call.rb,
lib/chef/provider/group/pw.rb,
lib/chef/provider/ifconfig.rb,
lib/chef/provider/template.rb,
lib/chef/provider/directory.rb,
lib/chef/provider/group/aix.rb,
lib/chef/provider/user/dscl.rb,
lib/chef/provider/breakpoint.rb,
lib/chef/provider/group/dscl.rb,
lib/chef/provider/group/suse.rb,
lib/chef/provider/ruby_block.rb,
lib/chef/provider/subversion.rb,
lib/chef/provider/env/windows.rb,
lib/chef/provider/mount/mount.rb,
lib/chef/provider/package/apt.rb,
lib/chef/provider/package/ips.rb,
lib/chef/provider/package/rpm.rb,
lib/chef/provider/package/yum.rb,
lib/chef/provider/remote_file.rb,
lib/chef/provider/cron/solaris.rb,
lib/chef/provider/http_request.rb,
lib/chef/provider/package/dpkg.rb,
lib/chef/provider/service/init.rb,
lib/chef/provider/user/useradd.rb,
lib/chef/provider/user/windows.rb,
lib/chef/provider/cookbook_file.rb,
lib/chef/provider/group/gpasswd.rb,
lib/chef/provider/group/usermod.rb,
lib/chef/provider/group/windows.rb,
lib/chef/provider/mount/windows.rb,
lib/chef/provider/group/groupadd.rb,
lib/chef/provider/group/groupmod.rb,
lib/chef/provider/package/pacman.rb,
lib/chef/provider/package/zypper.rb,
lib/chef/provider/service/debian.rb,
lib/chef/provider/service/macosx.rb,
lib/chef/provider/service/redhat.rb,
lib/chef/provider/service/simple.rb,
lib/chef/provider/deploy/revision.rb,
lib/chef/provider/package/freebsd.rb,
lib/chef/provider/package/portage.rb,
lib/chef/provider/package/smartos.rb,
lib/chef/provider/package/solaris.rb,
lib/chef/provider/resource_update.rb,
lib/chef/provider/service/freebsd.rb,
lib/chef/provider/service/insserv.rb,
lib/chef/provider/service/solaris.rb,
lib/chef/provider/service/upstart.rb,
lib/chef/provider/package/macports.rb,
lib/chef/provider/package/rubygems.rb,
lib/chef/provider/remote_directory.rb,
lib/chef/provider/service/invokercd.rb,
lib/chef/provider/deploy/timestamped.rb,
lib/chef/provider/package/easy_install.rb

Defined Under Namespace

Classes: Breakpoint, CookbookFile, Cron, Deploy, Directory, Env, ErlCall, Execute, File, Git, Group, HttpRequest, Ifconfig, Link, Log, Mdadm, Mount, Ohai, Package, RemoteDirectory, RemoteFile, ResourceUpdate, Route, RubyBlock, Script, Service, Subversion, Template, User

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Mixin::ConvertToClassName

convert_to_class_name, convert_to_snake_case, filename_to_qualified_string, snake_case_basename

Methods included from Mixin::EnforceOwnershipAndPermissions

#access_controls, #enforce_ownership_and_permissions

Methods included from Mixin::RecipeDefinitionDSLCore

#method_missing

Methods included from Mixin::Language

#data_bag, #data_bag_item, #platform?, #platform_family?, #search, #value_for_platform, #value_for_platform_family

Constructor Details

#initialize(new_resource, run_context) ⇒ Provider

Returns a new instance of Provider.



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# File 'lib/chef/provider.rb', line 46

def initialize(new_resource, run_context)
  @new_resource = new_resource
  @action = action
  @current_resource = nil
  @run_context = run_context
  @converge_actions = nil
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Chef::Mixin::RecipeDefinitionDSLCore

Instance Attribute Details

#action ⇒ Object

– TODO: this should be a reader, and the action should be passed in the constructor; however, many/most subclasses override the constructor so changing the arity would be a breaking change. Change this at the next break, e.g., Chef 11.



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# File 'lib/chef/provider.rb', line 40

def action
  @action
end

#current_resource ⇒ Object

Returns the value of attribute current_resource.



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# File 'lib/chef/provider.rb', line 32

def current_resource
  @current_resource
end

#new_resource ⇒ Object

Returns the value of attribute new_resource.



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# File 'lib/chef/provider.rb', line 31

def new_resource
  @new_resource
end

#run_context ⇒ Object

Returns the value of attribute run_context.



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# File 'lib/chef/provider.rb', line 33

def run_context
  @run_context
end

Class Method Details

.build_from_file(cookbook_name, filename, run_context) ⇒ Object 



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# File 'lib/chef/provider.rb', line 185

def build_from_file(cookbook_name, filename, run_context)
  pname = filename_to_qualified_string(cookbook_name, filename)

  # Add log entry if we override an existing light-weight provider.
  class_name = convert_to_class_name(pname)
  overriding = Chef::Provider.const_defined?(class_name)
  Chef::Log.info("#{class_name} light-weight provider already initialized -- overriding!") if overriding

  new_provider_class = Class.new self do |cls|

    include Chef::Mixin::RecipeDefinitionDSLCore

    def load_current_resource
      # silence Chef::Exceptions::Override exception
    end

    class << cls
      include Chef::Mixin::FromFile

      # setup DSL's shortcut methods
      def action(name, &block)
        define_method("action_#{name.to_s}") do
          instance_eval(&block)
        end
      end
    end

    # load provider definition from file
    cls.class_from_file(filename)
  end

  # register new class as a Chef::Provider
  pname = filename_to_qualified_string(cookbook_name, filename)
  class_name = convert_to_class_name(pname)
  Chef::Provider.const_set(class_name, new_provider_class)
  Chef::Log.debug("Loaded contents of #{filename} into a provider named #{pname} defined in Chef::Provider::#{class_name}")

  new_provider_class
end

Instance Method Details

#action_nothing ⇒ Object 



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# File 'lib/chef/provider.rb', line 85

def action_nothing
  Chef::Log.debug("Doing nothing for #{@new_resource.to_s}")
  true
end

#cleanup_after_converge ⇒ Object 



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# File 'lib/chef/provider.rb', line 82

def cleanup_after_converge
end

#converge ⇒ Object 



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# File 'lib/chef/provider.rb', line 135

def converge
  converge_actions.converge!
  if converge_actions.empty? && !@new_resource.updated_by_last_action?
    events.resource_up_to_date(@new_resource, @action)
  else
    events.resource_updated(@new_resource, @action)
    new_resource.updated_by_last_action(true) 
  end
end

#cookbook_name ⇒ Object 



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# File 'lib/chef/provider.rb', line 71

def cookbook_name
  new_resource.cookbook_name
end

#define_resource_requirements ⇒ Object 



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# File 'lib/chef/provider.rb', line 79

def define_resource_requirements
end

#events ⇒ Object 



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# File 'lib/chef/provider.rb', line 90

def events
  run_context.events
end

#load_current_resource ⇒ Object

Raises:



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# File 'lib/chef/provider.rb', line 75

def load_current_resource
  raise Chef::Exceptions::Override, "You must override load_current_resource in #{self.to_s}"
end

#node ⇒ Object 



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# File 'lib/chef/provider.rb', line 62

def node
  run_context && run_context.node
end

#process_resource_requirements ⇒ Object 



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# File 'lib/chef/provider.rb', line 130

def process_resource_requirements
  requirements.run(:all_actions) unless @action == :nothing
  requirements.run(@action)
end

#requirements ⇒ Object 



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# File 'lib/chef/provider.rb', line 145

def requirements
  @requirements ||= ResourceRequirements.new(@new_resource, run_context)
end

#resource_collection ⇒ Object

Used by providers supporting embedded recipes



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# File 'lib/chef/provider.rb', line 67

def resource_collection
  run_context && run_context.resource_collection
end

#run_action(action = nil) ⇒ Object 



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# File 'lib/chef/provider.rb', line 94

def run_action(action=nil)
  @action = action unless action.nil?

  # TODO: it would be preferable to get the action to be executed in the
  # constructor...

  # user-defined LWRPs may include unsafe load_current_resource methods that cannot be run in whyrun mode
  if !whyrun_mode? || whyrun_supported?
    load_current_resource
    events.resource_current_state_loaded(@new_resource, @action, @current_resource)
  elsif whyrun_mode? && !whyrun_supported?
    events.resource_current_state_load_bypassed(@new_resource, @action, @current_resource)
  end

  define_resource_requirements
  process_resource_requirements

  # user-defined providers including LWRPs may 
  # not include whyrun support - if they don't support it
  # we can't execute any actions while we're running in
  # whyrun mode. Instead we 'fake' whyrun by documenting that
  # we can't execute the action.
  # in non-whyrun mode, this will still cause the action to be
  # executed normally.
  if whyrun_supported? && !requirements.action_blocked?(@action)
    send("action_#{@action}")
  elsif whyrun_mode?
    events.resource_bypassed(@new_resource, @action, self)
  else
    send("action_#{@action}")
  end
  converge

  cleanup_after_converge
end

#whyrun_mode? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider.rb', line 54

def whyrun_mode?
  Chef::Config[:why_run]
end

#whyrun_supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider.rb', line 42

def whyrun_supported?
  false
end