Class: Chef::Provider::ErlCall

Inherits:
Chef::Provider show all
Includes:
Mixin::Command
Defined in:
lib/chef/provider/erl_call.rb

Instance Attribute Summary

Attributes inherited from Chef::Provider

#action, #current_resource, #new_resource, #run_context

Instance Method Summary collapse

Methods included from Mixin::Command

#chdir_or_tmpdir, #handle_command_failures, #output_of_command, #run_command, #run_command_with_systems_locale

Methods included from Mixin::Command::Windows

#popen4

Methods included from Mixin::Command::Unix

#popen4

Methods inherited from Chef::Provider

#action_nothing, #cleanup_after_converge, #cookbook_name, #define_resource_requirements, #events, #node, #process_resource_requirements, #requirements, #resource_collection, #run_action, #set_updated_status, #whyrun_mode?

Methods included from DSL::Recipe

#method_missing

Methods included from Mixin::ConvertToClassName

#convert_to_class_name, #convert_to_snake_case, #filename_to_qualified_string, #snake_case_basename

Constructor Details

#initialize(node, new_resource) ⇒ ErlCall

Returns a new instance of ErlCall.



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# File 'lib/chef/provider/erl_call.rb', line 28

def initialize(node, new_resource)
  super(node, new_resource)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Chef::DSL::Recipe

Instance Method Details

#action_run ⇒ Object 



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

def action_run
  case @new_resource.name_type
  when "sname"
    node = "-sname #{@new_resource.node_name}"
  when "name"
    node = "-name #{@new_resource.node_name}"
  end

  if @new_resource.cookie
    cookie = "-c #{@new_resource.cookie}"
  else
    cookie = ""
  end

  if @new_resource.distributed
    distributed = "-s"
  else
    distributed = ""
  end

  command = "erl_call -e #{distributed} #{node} #{cookie}"

  converge_by("run erlang block") do
    begin
      pid, stdin, stdout, stderr = popen4(command, :waitlast => true)

      Chef::Log.debug("#{@new_resource} running")
      Chef::Log.debug("#{@new_resource} command: #{command}")
      Chef::Log.debug("#{@new_resource} code: #{@new_resource.code}")

      @new_resource.code.each_line { |line| stdin.puts(line.chomp) }

      stdin.close

      Chef::Log.debug("#{@new_resource} output: ")

      stdout_output = ""
      stdout.each_line { |line| stdout_output << line }
      stdout.close

      stderr_output = ""
      stderr.each_line { |line| stderr_output << line }
      stderr.close

      # fail if stderr contains anything
      if stderr_output.length > 0
        raise Chef::Exceptions::ErlCall, stderr_output
      end

      # fail if the first 4 characters aren't "{ok,"
      unless stdout_output[0..3].include?('{ok,')
        raise Chef::Exceptions::ErlCall, stdout_output
      end

      @new_resource.updated_by_last_action(true)

      Chef::Log.debug("#{@new_resource} #{stdout_output}")
      Chef::Log.info("#{@new_resouce} ran successfully")
    ensure
      Process.wait(pid) if pid
    end
  end
end

#load_current_resource ⇒ Object 



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# File 'lib/chef/provider/erl_call.rb', line 36

def load_current_resource
  true
end

#whyrun_supported? ⇒ Boolean

Returns:

  • (Boolean) 


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

def whyrun_supported?
  true
end