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require 'puppet/parser/ast/component'
class Puppet::Parser::AST
# The code associated with a class. This is different from components
# in that each class is a singleton -- only one will exist for a given
# node.
class HostClass < AST::Component
@name = :class
# Are we a child of the passed class? Do a recursive search up our
# parentage tree to figure it out.
def child_of?(klass)
return false unless self.parentclass
if klass == self.parentclass
return true
else
return self.parentclass.child_of?(klass)
end
end
# Evaluate the code associated with this class.
def evaluate(hash)
scope = hash[:scope]
args = hash[:arguments]
# Verify that we haven't already been evaluated
if scope.setclass?(self)
Puppet.debug "%s class already evaluated" % @type
return nil
end
if @parentclass
if pklass = self.parentclass
pklass.safeevaluate :scope => scope
scope = parent_scope(scope, pklass)
else
parsefail "Could not find class %s" % @parentclass
end
end
unless hash[:nosubscope]
scope = subscope(scope)
end
# Set the class before we do anything else, so that it's set
# during the evaluation and can be inspected.
scope.setclass(self)
# Now evaluate our code, yo.
if self.code
return self.code.evaluate(:scope => scope)
else
return nil
end
end
def initialize(hash)
@parentclass = nil
super
end
def parent_scope(scope, klass)
if s = scope.class_scope(klass)
return s
else
raise Puppet::DevError, "Could not find scope for %s" % klass.fqname
end
end
end
end
# $Id$
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