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# Created by Luke Kanies on 2006-11-07.
# Copyright (c) 2006. All rights reserved.
class Puppet::Feature
# Create a new feature test. You have to pass the feature name,
# and it must be unique. You can either provide a block that
# will get executed immediately to determine if the feature
# is present, or you can pass an option to determine it.
# Currently, the only supported option is 'libs' (must be
# passed as a symbol), which will make sure that each lib loads
# successfully.
def add(name, options = {})
method = name.to_s + "?"
if self.class.respond_to?(method)
raise ArgumentError, "Feature %s is already defined" % name
end
result = true
if block_given?
begin
result = yield
rescue => detail
if Puppet[:trace]
puts detail.backtrace
Puppet.err "Failed to load %s: %s" % [name, detail]
end
result = false
end
end
if ary = options[:libs]
ary = [ary] unless ary.is_a?(Array)
ary.each do |lib|
unless lib.is_a?(String)
raise ArgumentError, "Libraries must be passed as strings not %s" % lib.class
end
begin
require lib
rescue Exception
Puppet.debug "Failed to load library '%s' for feature '%s'" % [lib, name]
result = false
end
end
end
meta_def(method) do
result
end
end
# Create a new feature collection.
def initialize(path)
@path = path
end
def load
loader = Puppet::Autoload.new(self, @path)
loader.loadall
end
end
# $Id$
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