class Build::Files::Path

def self.expand(subpath, root = Dir.getwd)

Expand a subpath within a given root, similar to `File.expand_path`
def self.expand(subpath, root = Dir.getwd)
	if subpath.start_with? File::SEPARATOR
		self.new(subpath)
	else
		self.join(root, subpath)
	end
end