`class BuildNode`

Represents a build graph node that applies a single provision to produce an output environment.

Definitions

`def initialize(environment, provision, arguments)`

Initialize the build node with an environment, provision, and arguments.

Signature

parameter　environment　Build::Environment: The environment to build within.
parameter　provision　Build::Dependency::Provision: The provision to apply.
parameter　arguments　Array: Arguments passed to the provision constructor.

Implementation

def initialize(environment, provision, arguments)
	@environment = environment
	@provision = provision
	@arguments = arguments
	
	super(Files::List::NONE, :inherit)
end

`def ==(other)`

Signature

returns　Boolean: Whether this node is equal to another.

Implementation

def == other
	super and
		@environment == other.environment and
		@provision == other.provision and
		@arguments == other.arguments
end

`def hash`

Signature

returns　Integer: A hash value for this node.

Implementation

def hash
	super ^ @environment.hash ^ @provision.hash ^ @arguments.hash
end

`def task_class(parent_task)`

Signature

returns　Class: The task class to use for building this node.

Implementation

def task_class(parent_task)
	task_class = Rulebook.for(@environment).with(BuildTask, environment: @environment)
end

`def initial_environment`

Signature

returns　Build::Environment: A fresh copy of the environment for output.

Implementation

def initial_environment
	Build::Environment.new(@environment)
end

`def name`

Signature

returns　String: The name of the environment.

Implementation

def name
	@environment.name
end

`def apply!(task)`

Apply this node to the given task, constructing the output environment.

Signature

parameter　task　Build::Task: The task context.

Implementation

def apply!(task)
	output_environment = self.initial_environment
	
	output_environment.construct!(task, *@arguments, &@provision.value)
	
	task.output_environment = output_environment
end