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require 'puppet/parser'
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module Proxy::Puppet
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class PuppetClass
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class << self
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# scans a given directory and its sub directory for puppet classes
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# returns an array of PuppetClass objects.
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def scan_directory directory
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# Get a Puppet Parser to parse the manifest source
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parser = Puppet::Parser::Parser.new Puppet::Node::Environment.new
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Dir.glob("#{directory}/*/manifests/**/*.pp").map do |manifest|
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scan_manifest File.read(manifest), manifest, parser
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end.compact.flatten
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end
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def scan_manifest manifest, filename = '', parser = nil
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klasses = []
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# Get a Puppet Parser to parse the manifest source
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parser ||= Puppet::Parser::Parser.new(Puppet::Node::Environment.new)
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already_seen = Set.new parser.known_resource_types.hostclasses.keys
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already_seen << '' # Prevent the toplevel "main" class from matching
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ast = parser.parse manifest
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# Get the parsed representation of the top most objects
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hostclasses = ast.respond_to?(:instantiate) ? ast.instantiate('') : ast.hostclasses.values
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hostclasses.each do |klass|
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# Only look at classes
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if klass.type == :hostclass and not already_seen.include? klass.namespace
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params = {}
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# Get parameters and eventual default values
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klass.arguments.each do |name, value|
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params[name] = ast_to_value(value) rescue nil
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end
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klasses << new(klass.namespace, params)
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end
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end
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klasses
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rescue => e
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puts "Error while parsing #{filename}: #{e}"
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klasses
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end
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private
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def ast_to_value value
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unless value.class.name.start_with? "Puppet::Parser::AST::"
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# Native Ruby types
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case value
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# Supported with exact JSON equivalent
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when NilClass, String, Numeric, Array, Hash, FalseClass, TrueClass
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value
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when Struct
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value.hash
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when Enumerable
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value.to_a
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# Stringified
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when Regexp # /(?:stringified)/
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"/#{value.to_s}/"
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when Symbol # stringified
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value.to_s
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else
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raise TypeError
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end
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else
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# Parser types
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case value
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# Supported with exact JSON equivalent
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when Puppet::Parser::AST::Boolean, Puppet::Parser::AST::String
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value.evaluate nil
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# Supported with stringification
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when Puppet::Parser::AST::Concat
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# Note1: only simple content are supported, plus variables whose raw name is taken
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# Note2: The variable substitution WON'T be done by Puppet from the ENC YAML output
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value.value.map do |v|
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case v
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when Puppet::Parser::AST::String
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v.evaluate nil
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when Puppet::Parser::AST::Variable
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"${#{v.value}}"
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else
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raise TypeError
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end
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end.join rescue nil
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when Puppet::Parser::AST::Type
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value.value
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when Puppet::Parser::AST::Name
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(Puppet::Parser::Scope.number?(value.value) or value.value)
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when Puppet::Parser::AST::Undef # equivalent of nil
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nil
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# Depends on content
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when Puppet::Parser::AST::ASTArray
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value.inject([]) { |arr, v| (arr << ast_to_value(v)) rescue arr }
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when Puppet::Parser::AST::ASTHash
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Hash[value.value.each.inject([]) { |arr, (k,v)| (arr << [ast_to_value(k), ast_to_value(v)]) rescue arr }]
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# Let's see if a raw evaluation works with no scope for any other type
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else
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if value.respond_to? :evaluate
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# Can probably work for: (depending on the actual content)
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# - Puppet::Parser::AST::ArithmeticOperator
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# - Puppet::Parser::AST::ComparisonOperator
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# - Puppet::Parser::AST::BooleanOperator
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# - Puppet::Parser::AST::Minus
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# - Puppet::Parser::AST::Not
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# May work for:
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# - Puppet::Parser::AST::InOperator
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# - Puppet::Parser::AST::MatchOperator
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# - Puppet::Parser::AST::Selector
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# Probably won't work for
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# - Puppet::Parser::AST::Variable
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# - Puppet::Parser::AST::HashOrArrayAccess
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# - Puppet::Parser::AST::ResourceReference
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# - Puppet::Parser::AST::Function
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value.evaluate nil
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else
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raise TypeError
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end
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end
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end
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end
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end
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def initialize name, params = {}
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@klass = name || raise("Must provide puppet class name")
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@params = params
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end
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def to_s
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self.module.nil? ? name : "#{self.module}::#{name}"
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end
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# returns module name (excluding of the class name)
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def module
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klass[0..(klass.index("::")-1)] if has_module?(klass)
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end
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# returns class name (excluding of the module name)
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def name
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has_module?(klass) ? klass[(klass.index("::")+2)..-1] : klass
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end
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attr_reader :params
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private
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attr_reader :klass
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def has_module?(klass)
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!!klass.index("::")
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end
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end
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end
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