Method: CfYAML.process

Defined in:
lib/libcfruby/cfyaml.rb

.process(object, changed = false) ⇒ Object

Executes an object loaded from a YAML file. changed is only used internally. Returns true if a known change was made. Specifically, it does the following (in order):

1. Check for a +condition+ key.  If it exists, eval it as a ruby statement and stop processing if the
   result of the eval() is false or nil.
2. Check for a +change_made+ key (which must be set to true or false).  This value is checked against
  whether or not a change was actually made by the *immediately previous* section.  If they do not match, then
  this section will stop processing.
3. The section is searched for a primary key, which will then determine how the rest of the section is
  processed.  These are:
   * load
   * actions
   * eval
   * filename
   * install
   * delete
   * disable
   * execute



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# File 'lib/libcfruby/cfyaml.rb', line 79

def CfYAML.process(object, changed=false)
	if(object.kind_of?(Hash))
		begin
			# first check for condition
			if(object.has_key?('conditions'))
				conditions = object['conditions']
				if(!conditions.kind_of?(Array))
					conditions = Array.[](conditions)
				end
		
				conditions.each() { |c|
					if(!eval(c.to_s))
						return(false)
					end
				}
			end
			
			if(object.has_key?('change_made'))
				if(object['change_made'] != changed)
					return(false)
				end
			end

			# load has to be handled here because it should not change
			# the changed flag on its own.
			if(object.has_key?('load'))
				if(object['load'].kind_of?(Array))
					object['load'].each() { |s|
						changed = load(s, changed)
					}
				else
					changed = load(object['load'], changed)
				end
			end

			changed = false
	
			if(object.has_key?('actions'))
				changed = process(object['actions'], changed)
			elsif(object.has_key?('eval'))
				evaluate(object)
			elsif(object.has_key?('filename'))
				changed = configure_file(object)
			elsif(object.has_key?('install'))
				changed = install_packages(object)
			elsif(object.has_key?('delete'))
				changed = delete(object)
			elsif(object.has_key?('disable'))
				changed = disable(object)
			elsif(object.has_key?('execute'))
				execute(object)
			else
				raise(CfYamlError, "Unable to find primary key (actions, eval, filename, install, or execute)")
			end
		rescue
			raise(CfYamlError, "Error processing section:\n #{object.to_yaml}\n\n#{$!.to_s}\n\n")
		end
	elsif(object.kind_of?(Array))
		object.each() { |o|
			changed = process(o, changed)
		}
	end
	
	return(changed)
end