Class: Puppet::Util::Feature
- Defined in:
- lib/vendor/puppet/util/feature.rb
Instance Attribute Summary collapse
-
#path ⇒ Object
readonly
Returns the value of attribute path.
Instance Method Summary collapse
-
#add(name, options = {}) ⇒ Object
Create a new feature test.
-
#initialize(path) ⇒ Feature
constructor
Create a new feature collection.
- #load ⇒ Object
- #method_missing(method, *args) ⇒ Object
-
#test(name, options) ⇒ Object
Actually test whether the feature is present.
Constructor Details
Dynamic Method Handling
This class handles dynamic methods through the method_missing method
#method_missing(method, *args) ⇒ Object
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# File 'lib/vendor/puppet/util/feature.rb', line 44 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 |
Instance Attribute Details
#path ⇒ Object (readonly)
Returns the value of attribute path.
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# File 'lib/vendor/puppet/util/feature.rb', line 2 def path @path end |
Instance Method Details
#add(name, options = {}) ⇒ Object
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.
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# File 'lib/vendor/puppet/util/feature.rb', line 11 def add(name, = {}) method = name.to_s + "?" raise ArgumentError, "Feature #{name} is already defined" if self.class.respond_to?(method) 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 (method) do # Positive cache only, except blocks which are executed just once above final = @results[name] || block_given? @results[name] = test(name, ) unless final @results[name] end end |
#load ⇒ Object
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# File 'lib/vendor/puppet/util/feature.rb', line 40 def load @loader.loadall end |
#test(name, options) ⇒ Object
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.
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# File 'lib/vendor/puppet/util/feature.rb', line 56 def test(name, ) return true unless ary = [: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 |