| Current Path : /usr/share/ruby/vendor_ruby/puppet/util/ |
Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
| Current File : //usr/share/ruby/vendor_ruby/puppet/util/feature.rb |
require 'puppet'
class Puppet::Util::Feature
attr_reader :path
# 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 + "?"
@results.delete(name)
if block_given?
begin
result = yield
rescue Exception => detail
warn "Failed to load feature test for #{name}: #{detail}"
result = false
end
@results[name] = result
end
meta_def(method) do
# we return a cached result if:
# * if a block is given (and we just evaluated it above)
# * if we already have a positive result
# * if we've tested this feature before and it failed, but we're
# configured to always cache
if block_given? ||
@results[name] ||
(@results.has_key?(name) and Puppet[:always_cache_features])
@results[name]
else
@results[name] = test(name, options)
@results[name]
end
end
end
# Create a new feature collection.
def initialize(path)
@path = path
@results = {}
@loader = Puppet::Util::Autoload.new(self, @path)
end
def load
@loader.loadall
end
def method_missing(method, *args)
return super unless method.to_s =~ /\?$/
feature = method.to_s.sub(/\?$/, '')
@loader.load(feature)
respond_to?(method) && self.send(method)
end
# Actually test whether the feature is present. We only want to test when
# someone asks for the feature, so we don't unnecessarily load
# files.
def test(name, options)
return true unless ary = options[:libs]
ary = [ary] unless ary.is_a?(Array)
ary.each do |lib|
return false unless load_library(lib, name)
end
# We loaded all of the required libraries
true
end
private
def load_library(lib, name)
raise ArgumentError, "Libraries must be passed as strings not #{lib.class}" unless lib.is_a?(String)
@rubygems ||= Puppet::Util::RubyGems::Source.new
@rubygems.clear_paths
begin
require lib
rescue SystemExit,NoMemoryError
raise
rescue Exception
Puppet.debug "Failed to load library '#{lib}' for feature '#{name}'"
return false
end
true
end
end