diff --git a/lib/puppet/pops/evaluator/compare_operator.rb b/lib/puppet/pops/evaluator/compare_operator.rb index a93395154..544f4d2c4 100644 --- a/lib/puppet/pops/evaluator/compare_operator.rb +++ b/lib/puppet/pops/evaluator/compare_operator.rb @@ -1,160 +1,170 @@ # Compares the puppet DSL way # # ==Equality # All string vs. numeric equalities check for numeric equality first, then string equality # Arrays are equal to arrays if they have the same length, and each element #equals # Hashes are equal to hashes if they have the same size and keys and values #equals. # All other objects are equal if they are ruby #== equal # class Puppet::Pops::Evaluator::CompareOperator include Puppet::Pops::Utils + # Provides access to the Puppet 3.x runtime (scope, etc.) + # This separation has been made to make it easier to later migrate the evaluator to an improved runtime. + # + include Puppet::Pops::Evaluator::Runtime3Support + def initialize @@equals_visitor ||= Puppet::Pops::Visitor.new(self, "equals", 1, 1) @@compare_visitor ||= Puppet::Pops::Visitor.new(self, "cmp", 1, 1) - @@include_visitor ||= Puppet::Pops::Visitor.new(self, "include", 1, 1) + @@include_visitor ||= Puppet::Pops::Visitor.new(self, "include", 2, 2) @type_calculator = Puppet::Pops::Types::TypeCalculator.new() end def equals (a, b) @@equals_visitor.visit_this_1(self, a, b) end # Performs a comparison of a and b, and return > 0 if a is bigger, 0 if equal, and < 0 if b is bigger. # Comparison of String vs. Numeric always compares using numeric. def compare(a, b) @@compare_visitor.visit_this_1(self, a, b) end # Answers is b included in a - def include?(a, b) - @@include_visitor.visit_this_1(self, a, b) + def include?(a, b, scope) + @@include_visitor.visit_this_2(self, a, b, scope) end protected def cmp_String(a, b) # if both are numerics in string form, compare as number n1 = Puppet::Pops::Utils.to_n(a) n2 = Puppet::Pops::Utils.to_n(b) # Numeric is always lexically smaller than a string, even if the string is empty. return n1 <=> n2 if n1 && n2 return -1 if n1 && b.is_a?(String) return 1 if n2 return a.casecmp(b) if b.is_a?(String) raise ArgumentError.new("A String is not comparable to a non String or Number") end # Equality is case independent. def equals_String(a, b) if n1 = Puppet::Pops::Utils.to_n(a) if n2 = Puppet::Pops::Utils.to_n(b) n1 == n2 else false end else return false unless b.is_a?(String) a.casecmp(b) == 0 end end def cmp_Numeric(a, b) if n2 = Puppet::Pops::Utils.to_n(b) a <=> n2 elsif b.kind_of?(String) # Numeric is always lexiographically smaller than a string, even if the string is empty. -1 else raise ArgumentError.new("A Numeric is not comparable to non Numeric or String") end end def equals_Numeric(a, b) if n2 = Puppet::Pops::Utils.to_n(b) a == n2 else false end end def equals_Array(a, b) return false unless b.is_a?(Array) && a.size == b.size a.each_index {|i| return false unless equals(a.slice(i), b.slice(i)) } true end def equals_Hash(a, b) return false unless b.is_a?(Hash) && a.size == b.size a.each {|ak, av| return false unless equals(b[ak], av)} true end def cmp_Symbol(a, b) if b.is_a?(Symbol) a <=> b else raise ArgumentError.new("Symbol not comparable to non Symbol") end end def cmp_Object(a, b) raise ArgumentError.new("Only Strings and Numbers are comparable") end def equals_Object(a, b) a == b end def equals_NilClass(a, b) b.nil? || b == :undef end def equals_Symbol(a, b) a == b || a == :undef && b.nil? end - def include_Object(a, b) + def include_Object(a, b, scope) false end - def include_String(a, b) + def include_String(a, b, scope) case b when String # subsstring search downcased a.downcase.include?(b.downcase) when Regexp - # match (convert to boolean) - !!(a =~ b) + matched = a.match(b) # nil, or MatchData + set_match_data(matched, scope) # creates ephemeral + !!matched # match (convert to boolean) when Numeric # convert string to number, true if == equals(a, b) else false end end - def include_Array(a, b) + def include_Array(a, b, scope) case b when Regexp + matched = nil a.each do |element| next unless element.is_a? String - return true if element =~ b + matched = element.match(b) # nil, or MatchData + break if matched end - return false + # Always set match data, a "not found" should not keep old match data visible + set_match_data(matched, scope) # creates ephemeral + return !!matched when Puppet::Pops::Types::PAbstractType a.each {|element| return true if @type_calculator.instance?(b, element) } return false else a.each {|element| return true if equals(element, b) } return false end end - def include_Hash(a, b) - include?(a.keys, b) + def include_Hash(a, b, scope) + include?(a.keys, b, scope) end end diff --git a/lib/puppet/pops/evaluator/evaluator_impl.rb b/lib/puppet/pops/evaluator/evaluator_impl.rb index 0ad191a96..2016a2d99 100644 --- a/lib/puppet/pops/evaluator/evaluator_impl.rb +++ b/lib/puppet/pops/evaluator/evaluator_impl.rb @@ -1,1028 +1,1028 @@ require 'rgen/ecore/ecore' require 'puppet/pops/evaluator/compare_operator' require 'puppet/pops/evaluator/relationship_operator' require 'puppet/pops/evaluator/access_operator' require 'puppet/pops/evaluator/closure' require 'puppet/pops/evaluator/external_syntax_support' # This implementation of {Puppet::Pops::Evaluator} performs evaluation using the puppet 3.x runtime system # in a manner largely compatible with Puppet 3.x, but adds new features and introduces constraints. # # The evaluation uses _polymorphic dispatch_ which works by dispatching to the first found method named after # the class or one of its super-classes. The EvaluatorImpl itself mainly deals with evaluation (it currently # also handles assignment), and it uses a delegation pattern to more specialized handlers of some operators # that in turn use polymorphic dispatch; this to not clutter EvaluatorImpl with too much responsibility). # # Since a pattern is used, only the main entry points are fully documented. The parameters _o_ and _scope_ are # the same in all the polymorphic methods, (the type of the parameter _o_ is reflected in the method's name; # either the actual class, or one of its super classes). The _scope_ parameter is always the scope in which # the evaluation takes place. If nothing else is mentioned, the return is always the result of evaluation. # # See {Puppet::Pops::Visitable} and {Puppet::Pops::Visitor} for more information about # polymorphic calling. # class Puppet::Pops::Evaluator::EvaluatorImpl include Puppet::Pops::Utils # Provides access to the Puppet 3.x runtime (scope, etc.) # This separation has been made to make it easier to later migrate the evaluator to an improved runtime. # include Puppet::Pops::Evaluator::Runtime3Support include Puppet::Pops::Evaluator::ExternalSyntaxSupport # This constant is not defined as Float::INFINITY in Ruby 1.8.7 (but is available in later version # Refactor when support is dropped for Ruby 1.8.7. # INFINITY = 1.0 / 0.0 # Reference to Issues name space makes it easier to refer to issues # (Issues are shared with the validator). # Issues = Puppet::Pops::Issues def initialize @@eval_visitor ||= Puppet::Pops::Visitor.new(self, "eval", 1, 1) @@lvalue_visitor ||= Puppet::Pops::Visitor.new(self, "lvalue", 1, 1) @@assign_visitor ||= Puppet::Pops::Visitor.new(self, "assign", 3, 3) @@string_visitor ||= Puppet::Pops::Visitor.new(self, "string", 1, 1) @@type_calculator ||= Puppet::Pops::Types::TypeCalculator.new() @@type_parser ||= Puppet::Pops::Types::TypeParser.new() @@compare_operator ||= Puppet::Pops::Evaluator::CompareOperator.new() @@relationship_operator ||= Puppet::Pops::Evaluator::RelationshipOperator.new() # Initialize the runtime module Puppet::Pops::Evaluator::Runtime3Support.instance_method(:initialize).bind(self).call() end # @api private def type_calculator @@type_calculator end # Polymorphic evaluate - calls eval_TYPE # # ## Polymorphic evaluate # Polymorphic evaluate calls a method on the format eval_TYPE where classname is the last # part of the class of the given _target_. A search is performed starting with the actual class, continuing # with each of the _target_ class's super classes until a matching method is found. # # # Description # Evaluates the given _target_ object in the given scope, optionally passing a block which will be # called with the result of the evaluation. # # @overload evaluate(target, scope, {|result| block}) # @param target [Object] evaluation target - see methods on the pattern assign_TYPE for actual supported types. # @param scope [Object] the runtime specific scope class where evaluation should take place # @return [Object] the result of the evaluation # # @api # def evaluate(target, scope) begin @@eval_visitor.visit_this_1(self, target, scope) rescue Puppet::Pops::SemanticError => e # a raised issue may not know the semantic target fail(e.issue, e.semantic || target, e.options, e) rescue StandardError => e if e.is_a? Puppet::ParseError # ParseError's are supposed to be fully configured with location information raise e end fail(Issues::RUNTIME_ERROR, target, {:detail => e.message}, e) end end # Polymorphic assign - calls assign_TYPE # # ## Polymorphic assign # Polymorphic assign calls a method on the format assign_TYPE where TYPE is the last # part of the class of the given _target_. A search is performed starting with the actual class, continuing # with each of the _target_ class's super classes until a matching method is found. # # # Description # Assigns the given _value_ to the given _target_. The additional argument _o_ is the instruction that # produced the target/value tuple and it is used to set the origin of the result. # @param target [Object] assignment target - see methods on the pattern assign_TYPE for actual supported types. # @param value [Object] the value to assign to `target` # @param o [Puppet::Pops::Model::PopsObject] originating instruction # @param scope [Object] the runtime specific scope where evaluation should take place # # @api # def assign(target, value, o, scope) @@assign_visitor.visit_this_3(self, target, value, o, scope) end def lvalue(o, scope) @@lvalue_visitor.visit_this_1(self, o, scope) end def string(o, scope) @@string_visitor.visit_this_1(self, o, scope) end # Evaluate a BlockExpression in a new scope with variables bound to the # given values. # # @param scope [Puppet::Parser::Scope] the parent scope # @param variable_bindings [Hash{String => Object}] the variable names and values to bind (names are keys, bound values are values) # @param block [Puppet::Pops::Model::BlockExpression] the sequence of expressions to evaluate in the new scope def evaluate_block_with_bindings(scope, variable_bindings, block_expr) with_guarded_scope(scope) do # change to create local scope_from - cannot give it file and line - # that is the place of the call, not "here" create_local_scope_from(variable_bindings, scope) evaluate(block_expr, scope) end end protected def lvalue_VariableExpression(o, scope) # evaluate the name evaluate(o.expr, scope) end # Catches all illegal lvalues # def lvalue_Object(o, scope) fail(Issues::ILLEGAL_ASSIGNMENT, o) end # Assign value to named variable. # The '$' sign is never part of the name. # @example In Puppet DSL # $name = value # @param name [String] name of variable without $ # @param value [Object] value to assign to the variable # @param o [Puppet::Pops::Model::PopsObject] originating instruction # @param scope [Object] the runtime specific scope where evaluation should take place # @return [value] # def assign_String(name, value, o, scope) if name =~ /::/ fail(Issues::CROSS_SCOPE_ASSIGNMENT, o.left_expr, {:name => name}) end set_variable(name, value, o, scope) value end def assign_Numeric(n, value, o, scope) fail(Issues::ILLEGAL_NUMERIC_ASSIGNMENT, o.left_expr, {:varname => n.to_s}) end # Catches all illegal assignment (e.g. 1 = 2, {'a'=>1} = 2, etc) # def assign_Object(name, value, o, scope) fail(Issues::ILLEGAL_ASSIGNMENT, o) end def eval_Factory(o, scope) evaluate(o.current, scope) end # Evaluates any object not evaluated to something else to itself. def eval_Object o, scope o end # Allows nil to be used as a Nop. # Evaluates to nil # TODO: What is the difference between literal undef, nil, and nop? # def eval_NilClass(o, scope) nil end # Evaluates Nop to nil. # TODO: or is this the same as :undef # TODO: is this even needed as a separate instruction when there is a literal undef? def eval_Nop(o, scope) nil end # Captures all LiteralValues not handled elsewhere. # def eval_LiteralValue(o, scope) o.value end # Reserved Words fail to evaluate # def eval_ReservedWord(o, scope) fail(Puppet::Pops::Issues::RESERVED_WORD, o, {:word => o.word}) end def eval_LiteralDefault(o, scope) :default end def eval_LiteralUndef(o, scope) :undef # TODO: or just use nil for this? end # A QualifiedReference (i.e. a capitalized qualified name such as Foo, or Foo::Bar) evaluates to a PType # def eval_QualifiedReference(o, scope) @@type_parser.interpret(o) end def eval_NotExpression(o, scope) ! is_true?(evaluate(o.expr, scope)) end def eval_UnaryMinusExpression(o, scope) - coerce_numeric(evaluate(o.expr, scope), o, scope) end def eval_UnfoldExpression(o, scope) candidate = evaluate(o.expr, scope) case candidate when Array candidate when Hash candidate.to_a else # turns anything else into an array (so result can be unfolded) [candidate] end end # Abstract evaluation, returns array [left, right] with the evaluated result of left_expr and # right_expr # @return > array with result of evaluating left and right expressions # def eval_BinaryExpression o, scope [ evaluate(o.left_expr, scope), evaluate(o.right_expr, scope) ] end # Evaluates assignment with operators =, +=, -= and # # @example Puppet DSL # $a = 1 # $a += 1 # $a -= 1 # def eval_AssignmentExpression(o, scope) name = lvalue(o.left_expr, scope) value = evaluate(o.right_expr, scope) case o.operator when :'=' # regular assignment assign(name, value, o, scope) when :'+=' # if value does not exist and strict is on, looking it up fails, else it is nil or :undef existing_value = get_variable_value(name, o, scope) begin if existing_value.nil? || existing_value == :undef assign(name, value, o, scope) else # Delegate to calculate function to deal with check of LHS, and perform ´+´ as arithmetic or concatenation the # same way as ArithmeticExpression performs `+`. assign(name, calculate(existing_value, value, :'+', o.left_expr, o.right_expr, scope), o, scope) end rescue ArgumentError => e fail(Issues::APPEND_FAILED, o, {:message => e.message}) end when :'-=' # If an attempt is made to delete values from something that does not exists, the value is :undef (it is guaranteed to not # include any values the user wants deleted anyway :-) # # if value does not exist and strict is on, looking it up fails, else it is nil or :undef existing_value = get_variable_value(name, o, scope) begin if existing_value.nil? || existing_value == :undef assign(name, :undef, o, scope) else # Delegate to delete function to deal with check of LHS, and perform deletion assign(name, delete(get_variable_value(name, o, scope), value), o, scope) end rescue ArgumentError => e fail(Issues::APPEND_FAILED, o, {:message => e.message}, e) end else fail(Issues::UNSUPPORTED_OPERATOR, o, {:operator => o.operator}) end value end ARITHMETIC_OPERATORS = [:'+', :'-', :'*', :'/', :'%', :'<<', :'>>'] COLLECTION_OPERATORS = [:'+', :'-', :'<<'] # Handles binary expression where lhs and rhs are array/hash or numeric and operator is +, - , *, % / << >> # def eval_ArithmeticExpression(o, scope) left, right = eval_BinaryExpression(o, scope) begin result = calculate(left, right, o.operator, o.left_expr, o.right_expr, scope) rescue ArgumentError => e fail(Issues::RUNTIME_ERROR, o, {:detail => e.message}, e) end result end # Handles binary expression where lhs and rhs are array/hash or numeric and operator is +, - , *, % / << >> # def calculate(left, right, operator, left_o, right_o, scope) unless ARITHMETIC_OPERATORS.include?(operator) fail(Issues::UNSUPPORTED_OPERATOR, left_o.eContainer, {:operator => o.operator}) end if (left.is_a?(Array) || left.is_a?(Hash)) && COLLECTION_OPERATORS.include?(operator) # Handle operation on collections case operator when :'+' concatenate(left, right) when :'-' delete(left, right) when :'<<' unless left.is_a?(Array) fail(Issues::OPERATOR_NOT_APPLICABLE, left_o, {:operator => operator, :left_value => left}) end left + [right] end else # Handle operation on numeric left = coerce_numeric(left, left_o, scope) right = coerce_numeric(right, right_o, scope) begin if operator == :'%' && (left.is_a?(Float) || right.is_a?(Float)) # Deny users the fun of seeing severe rounding errors and confusing results fail(Issues::OPERATOR_NOT_APPLICABLE, left_o, {:operator => operator, :left_value => left}) end result = left.send(operator, right) rescue NoMethodError => e fail(Issues::OPERATOR_NOT_APPLICABLE, left_o, {:operator => operator, :left_value => left}) rescue ZeroDivisionError => e fail(Issues::DIV_BY_ZERO, right_o) end if result == INFINITY || result == -INFINITY fail(Issues::RESULT_IS_INFINITY, left_o, {:operator => operator}) end result end end def eval_EppExpression(o, scope) scope["@epp"] = [] evaluate(o.body, scope) result = scope["@epp"].join('') result end def eval_RenderStringExpression(o, scope) scope["@epp"] << o.value.dup nil end def eval_RenderExpression(o, scope) scope["@epp"] << string(evaluate(o.expr, scope), scope) nil end # Evaluates Puppet DSL ->, ~>, <-, and <~ def eval_RelationshipExpression(o, scope) # First level evaluation, reduction to basic data types or puppet types, the relationship operator then translates this # to the final set of references (turning strings into references, which can not naturally be done by the main evaluator since # all strings should not be turned into references. # real = eval_BinaryExpression(o, scope) @@relationship_operator.evaluate(real, o, scope) end # Evaluates x[key, key, ...] # def eval_AccessExpression(o, scope) left = evaluate(o.left_expr, scope) keys = o.keys.nil? ? [] : o.keys.collect {|key| evaluate(key, scope) } Puppet::Pops::Evaluator::AccessOperator.new(o).access(left, scope, *keys) end # Evaluates <, <=, >, >=, and == # def eval_ComparisonExpression o, scope left, right = eval_BinaryExpression o, scope begin # Left is a type if left.is_a?(Puppet::Pops::Types::PAbstractType) case o.operator when :'==' @@type_calculator.equals(left,right) when :'!=' !@@type_calculator.equals(left,right) when :'<' # left can be assigned to right, but they are not equal @@type_calculator.assignable?(right, left) && ! @@type_calculator.equals(left,right) when :'<=' # left can be assigned to right @@type_calculator.assignable?(right, left) when :'>' # right can be assigned to left, but they are not equal @@type_calculator.assignable?(left,right) && ! @@type_calculator.equals(left,right) when :'>=' # right can be assigned to left @@type_calculator.assignable?(left, right) else fail(Issues::UNSUPPORTED_OPERATOR, o, {:operator => o.operator}) end else case o.operator when :'==' @@compare_operator.equals(left,right) when :'!=' ! @@compare_operator.equals(left,right) when :'<' @@compare_operator.compare(left,right) < 0 when :'<=' @@compare_operator.compare(left,right) <= 0 when :'>' @@compare_operator.compare(left,right) > 0 when :'>=' @@compare_operator.compare(left,right) >= 0 else fail(Issues::UNSUPPORTED_OPERATOR, o, {:operator => o.operator}) end end rescue ArgumentError => e fail(Issues::COMPARISON_NOT_POSSIBLE, o, { :operator => o.operator, :left_value => left, :right_value => right, :detail => e.message}, e) end end # Evaluates matching expressions with type, string or regexp rhs expression. # If RHS is a type, the =~ matches compatible (instance? of) type. # # @example # x =~ /abc.*/ # @example # x =~ "abc.*/" # @example # y = "abc" # x =~ "${y}.*" # @example # [1,2,3] =~ Array[Integer[1,10]] # # Note that a string is not instance? of Regexp, only Regular expressions are. # The Pattern type should instead be used as it is specified as subtype of String. # # @return [Boolean] if a match was made or not. Also sets $0..$n to matchdata in current scope. # def eval_MatchExpression o, scope left, pattern = eval_BinaryExpression o, scope # matches RHS types as instance of for all types except a parameterized Regexp[R] if pattern.is_a?(Puppet::Pops::Types::PAbstractType) # evaluate as instance? of type check matched = @@type_calculator.instance?(pattern, left) # convert match result to Boolean true, or false return o.operator == :'=~' ? !!matched : !matched end begin pattern = Regexp.new(pattern) unless pattern.is_a?(Regexp) rescue StandardError => e fail(Issues::MATCH_NOT_REGEXP, o.right_expr, {:detail => e.message}, e) end unless left.is_a?(String) fail(Issues::MATCH_NOT_STRING, o.left_expr, {:left_value => left}) end matched = pattern.match(left) # nil, or MatchData - set_match_data(matched, o, scope) # creates ephemeral + set_match_data(matched,scope) # creates ephemeral # convert match result to Boolean true, or false o.operator == :'=~' ? !!matched : !matched end # Evaluates Puppet DSL `in` expression # def eval_InExpression o, scope left, right = eval_BinaryExpression o, scope - @@compare_operator.include?(right, left) + @@compare_operator.include?(right, left, scope) end # @example # $a and $b # b is only evaluated if a is true # def eval_AndExpression o, scope is_true?(evaluate(o.left_expr, scope)) ? is_true?(evaluate(o.right_expr, scope)) : false end # @example # a or b # b is only evaluated if a is false # def eval_OrExpression o, scope is_true?(evaluate(o.left_expr, scope)) ? true : is_true?(evaluate(o.right_expr, scope)) end # Evaluates each entry of the literal list and creates a new Array # Supports unfolding of entries # @return [Array] with the evaluated content # def eval_LiteralList o, scope unfold([], o.values, scope) end # Evaluates each entry of the literal hash and creates a new Hash. # @return [Hash] with the evaluated content # def eval_LiteralHash o, scope h = Hash.new o.entries.each {|entry| h[ evaluate(entry.key, scope)]= evaluate(entry.value, scope)} h end # Evaluates all statements and produces the last evaluated value # def eval_BlockExpression o, scope r = nil o.statements.each {|s| r = evaluate(s, scope)} r end # Performs optimized search over case option values, lazily evaluating each # until there is a match. If no match is found, the case expression's default expression # is evaluated (it may be nil or Nop if there is no default, thus producing nil). # If an option matches, the result of evaluating that option is returned. # @return [Object, nil] what a matched option returns, or nil if nothing matched. # def eval_CaseExpression(o, scope) # memo scope level before evaluating test - don't want a match in the case test to leak $n match vars # to expressions after the case expression. # with_guarded_scope(scope) do test = evaluate(o.test, scope) result = nil the_default = nil if o.options.find do |co| # the first case option that matches if co.values.find do |c| case c when Puppet::Pops::Model::LiteralDefault the_default = co.then_expr is_match?(test, evaluate(c, scope), c, scope) when Puppet::Pops::Model::UnfoldExpression # not ideal for error reporting, since it is not known which unfolded result # that caused an error - the entire unfold expression is blamed (i.e. the var c, passed to is_match?) evaluate(c, scope).any? {|v| is_match?(test, v, c, scope) } else is_match?(test, evaluate(c, scope), c, scope) end end result = evaluate(co.then_expr, scope) true # the option was picked end end result # an option was picked, and produced a result else evaluate(the_default, scope) # evaluate the default (should be a nop/nil) if there is no default). end end end # Evaluates a CollectExpression by transforming it into a 3x AST::Collection and then evaluating that. # This is done because of the complex API between compiler, indirector, backends, and difference between # collecting virtual resources and exported resources. # def eval_CollectExpression o, scope # The Collect Expression and its contained query expressions are implemented in such a way in # 3x that it is almost impossible to do anything about them (the AST objects are lazily evaluated, # and the built structure consists of both higher order functions and arrays with query expressions # that are either used as a predicate filter, or given to an indirection terminus (such as the Puppet DB # resource terminus). Unfortunately, the 3x implementation has many inconsistencies that the implementation # below carries forward. # collect_3x = Puppet::Pops::Model::AstTransformer.new().transform(o) collected = collect_3x.evaluate(scope) # the 3x returns an instance of Parser::Collector (but it is only registered with the compiler at this # point and does not contain any valuable information (like the result) # Dilemma: If this object is returned, it is a first class value in the Puppet Language and we # need to be able to perform operations on it. We can forbid it from leaking by making CollectExpression # a non R-value. This makes it possible for the evaluator logic to make use of the Collector. collected end def eval_ParenthesizedExpression(o, scope) evaluate(o.expr, scope) end # This evaluates classes, nodes and resource type definitions to nil, since 3x: # instantiates them, and evaluates their parameters and body. This is achieved by # providing bridge AST classes in Puppet::Parser::AST::PopsBridge that bridges a # Pops Program and a Pops Expression. # # Since all Definitions are handled "out of band", they are treated as a no-op when # evaluated. # def eval_Definition(o, scope) nil end def eval_Program(o, scope) evaluate(o.body, scope) end # Produces Array[PAnyType], an array of resource references # def eval_ResourceExpression(o, scope) exported = o.exported virtual = o.virtual type_name = evaluate(o.type_name, scope) o.bodies.map do |body| titles = [evaluate(body.title, scope)].flatten evaluated_parameters = body.operations.map {|op| evaluate(op, scope) } create_resources(o, scope, virtual, exported, type_name, titles, evaluated_parameters) end.flatten.compact end def eval_ResourceOverrideExpression(o, scope) evaluated_resources = evaluate(o.resources, scope) evaluated_parameters = o.operations.map { |op| evaluate(op, scope) } create_resource_overrides(o, scope, [evaluated_resources].flatten, evaluated_parameters) evaluated_resources end # Produces 3x array of parameters def eval_AttributeOperation(o, scope) create_resource_parameter(o, scope, o.attribute_name, evaluate(o.value_expr, scope), o.operator) end # Sets default parameter values for a type, produces the type # def eval_ResourceDefaultsExpression(o, scope) type_name = o.type_ref.value # a QualifiedName's string value evaluated_parameters = o.operations.map {|op| evaluate(op, scope) } create_resource_defaults(o, scope, type_name, evaluated_parameters) # Produce the type evaluate(o.type_ref, scope) end # Evaluates function call by name. # def eval_CallNamedFunctionExpression(o, scope) # The functor expression is not evaluated, it is not possible to select the function to call # via an expression like $a() case o.functor_expr when Puppet::Pops::Model::QualifiedName # ok when Puppet::Pops::Model::RenderStringExpression # helpful to point out this easy to make Epp error fail(Issues::ILLEGAL_EPP_PARAMETERS, o) else fail(Issues::ILLEGAL_EXPRESSION, o.functor_expr, {:feature=>'function name', :container => o}) end name = o.functor_expr.value evaluated_arguments = unfold([], o.arguments, scope) # wrap lambda in a callable block if it is present evaluated_arguments << Puppet::Pops::Evaluator::Closure.new(self, o.lambda, scope) if o.lambda call_function(name, evaluated_arguments, o, scope) end # Evaluation of CallMethodExpression handles a NamedAccessExpression functor (receiver.function_name) # def eval_CallMethodExpression(o, scope) unless o.functor_expr.is_a? Puppet::Pops::Model::NamedAccessExpression fail(Issues::ILLEGAL_EXPRESSION, o.functor_expr, {:feature=>'function accessor', :container => o}) end receiver = evaluate(o.functor_expr.left_expr, scope) name = o.functor_expr.right_expr unless name.is_a? Puppet::Pops::Model::QualifiedName fail(Issues::ILLEGAL_EXPRESSION, o.functor_expr, {:feature=>'function name', :container => o}) end name = name.value # the string function name evaluated_arguments = unfold([receiver], o.arguments || [], scope) # wrap lambda in a callable block if it is present evaluated_arguments << Puppet::Pops::Evaluator::Closure.new(self, o.lambda, scope) if o.lambda call_function(name, evaluated_arguments, o, scope) end # @example # $x ? { 10 => true, 20 => false, default => 0 } # def eval_SelectorExpression o, scope # memo scope level before evaluating test - don't want a match in the case test to leak $n match vars # to expressions after the selector expression. # with_guarded_scope(scope) do test = evaluate(o.left_expr, scope) the_default = nil selected = o.selectors.find do |s| me = s.matching_expr case me when Puppet::Pops::Model::LiteralDefault the_default = s.value_expr false when Puppet::Pops::Model::UnfoldExpression # not ideal for error reporting, since it is not known which unfolded result # that caused an error - the entire unfold expression is blamed (i.e. the var c, passed to is_match?) evaluate(me, scope).any? {|v| is_match?(test, v, me, scope) } else is_match?(test, evaluate(me, scope), me, scope) end end if selected evaluate(selected.value_expr, scope) elsif the_default evaluate(the_default, scope) else fail(Issues::UNMATCHED_SELECTOR, o.left_expr, :param_value => test) end end end # SubLocatable is simply an expression that holds location information def eval_SubLocatedExpression o, scope evaluate(o.expr, scope) end # Evaluates Puppet DSL Heredoc def eval_HeredocExpression o, scope result = evaluate(o.text_expr, scope) assert_external_syntax(scope, result, o.syntax, o.text_expr) result end # Evaluates Puppet DSL `if` def eval_IfExpression o, scope with_guarded_scope(scope) do if is_true?(evaluate(o.test, scope)) evaluate(o.then_expr, scope) else evaluate(o.else_expr, scope) end end end # Evaluates Puppet DSL `unless` def eval_UnlessExpression o, scope with_guarded_scope(scope) do unless is_true?(evaluate(o.test, scope)) evaluate(o.then_expr, scope) else evaluate(o.else_expr, scope) end end end # Evaluates a variable (getting its value) # The evaluator is lenient; any expression producing a String is used as a name # of a variable. # def eval_VariableExpression o, scope # Evaluator is not too fussy about what constitutes a name as long as the result # is a String and a valid variable name # name = evaluate(o.expr, scope) # Should be caught by validation, but make this explicit here as well, or mysterious evaluation issues # may occur. case name when String when Numeric else fail(Issues::ILLEGAL_VARIABLE_EXPRESSION, o.expr) end # TODO: Check for valid variable name (Task for validator) # TODO: semantics of undefined variable in scope, this just returns what scope does == value or nil get_variable_value(name, o, scope) end # Evaluates double quoted strings that may contain interpolation # def eval_ConcatenatedString o, scope o.segments.collect {|expr| string(evaluate(expr, scope), scope)}.join end # If the wrapped expression is a QualifiedName, it is taken as the name of a variable in scope. # Note that this is different from the 3.x implementation, where an initial qualified name # is accepted. (e.g. `"---${var + 1}---"` is legal. This implementation requires such concrete # syntax to be expressed in a model as `(TextExpression (+ (Variable var) 1)` - i.e. moving the decision to # the parser. # # Semantics; the result of an expression is turned into a string, nil is silently transformed to empty # string. # @return [String] the interpolated result # def eval_TextExpression o, scope if o.expr.is_a?(Puppet::Pops::Model::QualifiedName) # TODO: formalize, when scope returns nil, vs error string(get_variable_value(o.expr.value, o, scope), scope) else string(evaluate(o.expr, scope), scope) end end def string_Object(o, scope) o.to_s end def string_Symbol(o, scope) case o when :undef '' else o.to_s end end def string_Array(o, scope) ['[', o.map {|e| string(e, scope)}.join(', '), ']'].join() end def string_Hash(o, scope) ['{', o.map {|k,v| string(k, scope) + " => " + string(v, scope)}.join(', '), '}'].join() end def string_Regexp(o, scope) ['/', o.source, '/'].join() end def string_PAbstractType(o, scope) @@type_calculator.string(o) end # Produces concatenation / merge of x and y. # # When x is an Array, y of type produces: # # * Array => concatenation `[1,2], [3,4] => [1,2,3,4]` # * Hash => concatenation of hash as array `[key, value, key, value, ...]` # * any other => concatenation of single value # # When x is a Hash, y of type produces: # # * Array => merge of array interpreted as `[key, value, key, value,...]` # * Hash => a merge, where entries in `y` overrides # * any other => error # # When x is something else, wrap it in an array first. # # When x is nil, an empty array is used instead. # # @note to concatenate an Array, nest the array - i.e. `[1,2], [[2,3]]` # # @overload concatenate(obj_x, obj_y) # @param obj_x [Object] object to wrap in an array and concatenate to; see other overloaded methods for return type # @param ary_y [Object] array to concatenate at end of `ary_x` # @return [Object] wraps obj_x in array before using other overloaded option based on type of obj_y # @overload concatenate(ary_x, ary_y) # @param ary_x [Array] array to concatenate to # @param ary_y [Array] array to concatenate at end of `ary_x` # @return [Array] new array with `ary_x` + `ary_y` # @overload concatenate(ary_x, hsh_y) # @param ary_x [Array] array to concatenate to # @param hsh_y [Hash] converted to array form, and concatenated to array # @return [Array] new array with `ary_x` + `hsh_y` converted to array # @overload concatenate (ary_x, obj_y) # @param ary_x [Array] array to concatenate to # @param obj_y [Object] non array or hash object to add to array # @return [Array] new array with `ary_x` + `obj_y` added as last entry # @overload concatenate(hsh_x, ary_y) # @param hsh_x [Hash] the hash to merge with # @param ary_y [Array] array interpreted as even numbered sequence of key, value merged with `hsh_x` # @return [Hash] new hash with `hsh_x` merged with `ary_y` interpreted as hash in array form # @overload concatenate(hsh_x, hsh_y) # @param hsh_x [Hash] the hash to merge to # @param hsh_y [Hash] hash merged with `hsh_x` # @return [Hash] new hash with `hsh_x` merged with `hsh_y` # @raise [ArgumentError] when `xxx_x` is neither an Array nor a Hash # @raise [ArgumentError] when `xxx_x` is a Hash, and `xxx_y` is neither Array nor Hash. # def concatenate(x, y) x = [x] unless x.is_a?(Array) || x.is_a?(Hash) case x when Array y = case y when Array then y when Hash then y.to_a else [y] end x + y # new array with concatenation when Hash y = case y when Hash then y when Array # Hash[[a, 1, b, 2]] => {} # Hash[a,1,b,2] => {a => 1, b => 2} # Hash[[a,1], [b,2]] => {[a,1] => [b,2]} # Hash[[[a,1], [b,2]]] => {a => 1, b => 2} # Use type calcultor to determine if array is Array[Array[?]], and if so use second form # of call t = @@type_calculator.infer(y) if t.element_type.is_a? Puppet::Pops::Types::PArrayType Hash[y] else Hash[*y] end else raise ArgumentError.new("Can only append Array or Hash to a Hash") end x.merge y # new hash with overwrite else raise ArgumentError.new("Can only append to an Array or a Hash.") end end # Produces the result x \ y (set difference) # When `x` is an Array, `y` is transformed to an array and then all matching elements removed from x. # When `x` is a Hash, all contained keys are removed from x as listed in `y` if it is an Array, or all its keys if it is a Hash. # The difference is returned. The given `x` and `y` are not modified by this operation. # @raise [ArgumentError] when `x` is neither an Array nor a Hash # def delete(x, y) result = x.dup case x when Array y = case y when Array then y when Hash then y.to_a else [y] end y.each {|e| result.delete(e) } when Hash y = case y when Array then y when Hash then y.keys else [y] end y.each {|e| result.delete(e) } else raise ArgumentError.new("Can only delete from an Array or Hash.") end result end # Implementation of case option matching. # # This is the type of matching performed in a case option, using == for every type # of value except regular expression where a match is performed. # def is_match? left, right, o, scope if right.is_a?(Regexp) return false unless left.is_a? String matched = right.match(left) - set_match_data(matched, o, scope) # creates or clears ephemeral + set_match_data(matched, scope) # creates or clears ephemeral !!matched # convert to boolean elsif right.is_a?(Puppet::Pops::Types::PAbstractType) # right is a type and left is not - check if left is an instance of the given type # (The reverse is not terribly meaningful - computing which of the case options that first produces # an instance of a given type). # @@type_calculator.instance?(right, left) else # Handle equality the same way as the language '==' operator (case insensitive etc.) @@compare_operator.equals(left,right) end end def with_guarded_scope(scope) scope_memo = get_scope_nesting_level(scope) begin yield ensure set_scope_nesting_level(scope, scope_memo) end end # Maps the expression in the given array to their product except for UnfoldExpressions which are first unfolded. # The result is added to the given result Array. # @param result [Array] Where to add the result (may contain information to add to) # @param array [Array[Puppet::Pops::Model::Expression] the expressions to map # @param scope [Puppet::Parser::Scope] the scope to evaluate in # @return [Array] the given result array with content added from the operation # def unfold(result, array, scope) array.each do |x| if x.is_a?(Puppet::Pops::Model::UnfoldExpression) result.concat(evaluate(x, scope)) else result << evaluate(x, scope) end end result end private :unfold end diff --git a/lib/puppet/pops/evaluator/runtime3_support.rb b/lib/puppet/pops/evaluator/runtime3_support.rb index a2bcc22ca..4d4c68103 100644 --- a/lib/puppet/pops/evaluator/runtime3_support.rb +++ b/lib/puppet/pops/evaluator/runtime3_support.rb @@ -1,543 +1,543 @@ # A module with bindings between the new evaluator and the 3x runtime. # The intention is to separate all calls into scope, compiler, resource, etc. in this module # to make it easier to later refactor the evaluator for better implementations of the 3x classes. # # @api private module Puppet::Pops::Evaluator::Runtime3Support # Fails the evaluation of _semantic_ with a given issue. # # @param issue [Puppet::Pops::Issue] the issue to report # @param semantic [Puppet::Pops::ModelPopsObject] the object for which evaluation failed in some way. Used to determine origin. # @param options [Hash] hash of optional named data elements for the given issue # @return [!] this method does not return # @raise [Puppet::ParseError] an evaluation error initialized from the arguments (TODO: Change to EvaluationError?) # def fail(issue, semantic, options={}, except=nil) optionally_fail(issue, semantic, options, except) # an error should have been raised since fail always fails raise ArgumentError, "Internal Error: Configuration of runtime error handling wrong: should have raised exception" end # Optionally (based on severity) Fails the evaluation of _semantic_ with a given issue # If the given issue is configured to be of severity < :error it is only reported, and the function returns. # # @param issue [Puppet::Pops::Issue] the issue to report # @param semantic [Puppet::Pops::ModelPopsObject] the object for which evaluation failed in some way. Used to determine origin. # @param options [Hash] hash of optional named data elements for the given issue # @return [!] this method does not return # @raise [Puppet::ParseError] an evaluation error initialized from the arguments (TODO: Change to EvaluationError?) # def optionally_fail(issue, semantic, options={}, except=nil) if except.nil? # Want a stacktrace, and it must be passed as an exception begin raise EvaluationError.new() rescue EvaluationError => e except = e end end diagnostic_producer.accept(issue, semantic, options, except) end # Binds the given variable name to the given value in the given scope. # The reference object `o` is intended to be used for origin information - the 3x scope implementation # only makes use of location when there is an error. This is now handled by other mechanisms; first a check # is made if a variable exists and an error is raised if attempting to change an immutable value. Errors # in name, numeric variable assignment etc. have also been validated prior to this call. In the event the # scope.setvar still raises an error, the general exception handling for evaluation of the assignment # expression knows about its location. Because of this, there is no need to extract the location for each # setting (extraction is somewhat expensive since 3x requires line instead of offset). # def set_variable(name, value, o, scope) # Scope also checks this but requires that location information are passed as options. # Those are expensive to calculate and a test is instead made here to enable failing with better information. # The error is not specific enough to allow catching it - need to check the actual message text. # TODO: Improve the messy implementation in Scope. # if scope.bound?(name) if Puppet::Parser::Scope::RESERVED_VARIABLE_NAMES.include?(name) fail(Puppet::Pops::Issues::ILLEGAL_RESERVED_ASSIGNMENT, o, {:name => name} ) else fail(Puppet::Pops::Issues::ILLEGAL_REASSIGNMENT, o, {:name => name} ) end end scope.setvar(name, value) end # Returns the value of the variable (nil is returned if variable has no value, or if variable does not exist) # def get_variable_value(name, o, scope) # Puppet 3x stores all variables as strings (then converts them back to numeric with a regexp... to see if it is a match variable) # Not ideal, scope should support numeric lookup directly instead. # TODO: consider fixing scope catch(:undefined_variable) { return scope.lookupvar(name.to_s) } # It is always ok to reference numeric variables even if they are not assigned. They are always undef # if not set by a match expression. # unless name =~ Puppet::Pops::Patterns::NUMERIC_VAR_NAME fail(Puppet::Pops::Issues::UNKNOWN_VARIABLE, o, {:name => name}) end end # Returns true if the variable of the given name is set in the given most nested scope. True is returned even if # variable is bound to nil. # def variable_bound?(name, scope) scope.bound?(name.to_s) end # Returns true if the variable is bound to a value or nil, in the scope or it's parent scopes. # def variable_exists?(name, scope) scope.exist?(name.to_s) end - def set_match_data(match_data, o, scope) + def set_match_data(match_data, scope) # See set_variable for rationale for not passing file and line to ephemeral_from. # NOTE: The 3x scope adds one ephemeral(match) to its internal stack per match that succeeds ! It never # clears anything. Thus a context that performs many matches will get very deep (there simply is no way to # clear the match variables without rolling back the ephemeral stack.) # This implementation does not attempt to fix this, it behaves the same bad way. unless match_data.nil? scope.ephemeral_from(match_data) end end # Creates a local scope with vairalbes set from a hash of variable name to value # def create_local_scope_from(hash, scope) # two dummy values are needed since the scope tries to give an error message (can not happen in this # case - it is just wrong, the error should be reported by the caller who knows in more detail where it # is in the source. # raise ArgumentError, "Internal error - attempt to create a local scope without a hash" unless hash.is_a?(Hash) scope.ephemeral_from(hash) end # Creates a nested match scope def create_match_scope_from(scope) # Create a transparent match scope (for future matches) scope.new_match_scope(nil) end def get_scope_nesting_level(scope) scope.ephemeral_level end def set_scope_nesting_level(scope, level) # Yup, 3x uses this method to reset the level, it also supports passing :all to destroy all # ephemeral/local scopes - which is a sure way to create havoc. # scope.unset_ephemeral_var(level) end # Adds a relationship between the given `source` and `target` of the given `relationship_type` # @param source [Puppet:Pops::Types::PCatalogEntryType] the source end of the relationship (from) # @param target [Puppet:Pops::Types::PCatalogEntryType] the target end of the relationship (to) # @param relationship_type [:relationship, :subscription] the type of the relationship # def add_relationship(source, target, relationship_type, scope) # The 3x way is to record a Puppet::Parser::Relationship that is evaluated at the end of the compilation. # This means it is not possible to detect any duplicates at this point (and signal where an attempt is made to # add a duplicate. There is also no location information to signal the original place in the logic. The user will have # to go fish. # The 3.x implementation is based on Strings :-o, so the source and target must be transformed. The resolution is # done by Catalog#resource(type, title). To do that, it creates a Puppet::Resource since it is responsible for # translating the name/type/title and create index-keys used by the catalog. The Puppet::Resource has bizarre parsing of # the type and title (scan for [] that is interpreted as type/title (but it gets it wrong). # Moreover if the type is "" or "component", the type is Class, and if the type is :main, it is :main, all other cases # undergo capitalization of name-segments (foo::bar becomes Foo::Bar). (This was earlier done in the reverse by the parser). # Further, the title undergoes the same munging !!! # # That bug infested nest of messy logic needs serious Exorcism! # # Unfortunately it is not easy to simply call more intelligent methods at a lower level as the compiler evaluates the recorded # Relationship object at a much later point, and it is responsible for invoking all the messy logic. # # TODO: Revisit the below logic when there is a sane implementation of the catalog, compiler and resource. For now # concentrate on transforming the type references to what is expected by the wacky logic. # # HOWEVER, the Compiler only records the Relationships, and the only method it calls is @relationships.each{|x| x.evaluate(catalog) } # Which means a smarter Relationship class could do this right. Instead of obtaining the resource from the catalog using # the borked resource(type, title) which creates a resource for the purpose of looking it up, it needs to instead # scan the catalog's resources # # GAAAH, it is even worse! # It starts in the parser, which parses "File['foo']" into an AST::ResourceReference with type = File, and title = foo # This AST is evaluated by looking up the type/title in the scope - causing it to be loaded if it exists, and if not, the given # type name/title is used. It does not search for resource instances, only classes and types. It returns symbolic information # [type, [title, title]]. From this, instances of Puppet::Resource are created and returned. These only have type/title information # filled out. One or an array of resources are returned. # This set of evaluated (empty reference) Resource instances are then passed to the relationship operator. It creates a # Puppet::Parser::Relationship giving it a source and a target that are (empty reference) Resource instances. These are then remembered # until the relationship is evaluated by the compiler (at the end). When evaluation takes place, the (empty reference) Resource instances # are converted to String (!?! WTF) on the simple format "#{type}[#{title}]", and the catalog is told to find a resource, by giving # it this string. If it cannot find the resource it fails, else the before/notify parameter is appended with the target. # The search for the resource begin with (you guessed it) again creating an (empty reference) resource from type and title (WTF?!?!). # The catalog now uses the reference resource to compute a key [r.type, r.title.to_s] and also gets a uniqueness key from the # resource (This is only a reference type created from title and type). If it cannot find it with the first key, it uses the # uniqueness key to lookup. # # This is probably done to allow a resource type to munge/translate the title in some way (but it is quite unclear from the long # and convoluted path of evaluation. # In order to do this in a way that is similar to 3.x two resources are created to be used as keys. # # And if that is not enough, a source/target may be a Collector (a baked query that will be evaluated by the # compiler - it is simply passed through here for processing by the compiler at the right time). # if source.is_a?(Puppet::Parser::Collector) # use verbatim - behavior defined by 3x source_resource = source else # transform into the wonderful String representation in 3x type, title = catalog_type_to_split_type_title(source) source_resource = Puppet::Resource.new(type, title) end if target.is_a?(Puppet::Parser::Collector) # use verbatim - behavior defined by 3x target_resource = target else # transform into the wonderful String representation in 3x type, title = catalog_type_to_split_type_title(target) target_resource = Puppet::Resource.new(type, title) end # Add the relationship to the compiler for later evaluation. scope.compiler.add_relationship(Puppet::Parser::Relationship.new(source_resource, target_resource, relationship_type)) end # Coerce value `v` to numeric or fails. # The given value `v` is coerced to Numeric, and if that fails the operation # calls {#fail}. # @param v [Object] the value to convert # @param o [Object] originating instruction # @param scope [Object] the (runtime specific) scope where evaluation of o takes place # @return [Numeric] value `v` converted to Numeric. # def coerce_numeric(v, o, scope) unless n = Puppet::Pops::Utils.to_n(v) fail(Puppet::Pops::Issues::NOT_NUMERIC, o, {:value => v}) end n end def call_function(name, args, o, scope) # Call via 4x API if the function exists there loaders = scope.compiler.loaders # find the loader that loaded the code, or use the private_environment_loader (sees env + all modules) adapter = Puppet::Pops::Utils.find_adapter(o, Puppet::Pops::Adapters::LoaderAdapter) loader = adapter.nil? ? loaders.private_environment_loader : adapter.loader if loader && func = loader.load(:function, name) return func.call(scope, *args) end # Call via 3x API if function exists there fail(Puppet::Pops::Issues::UNKNOWN_FUNCTION, o, {:name => name}) unless Puppet::Parser::Functions.function(name) # TODO: if Puppet[:biff] == true, then 3x functions should be called via loaders above # Arguments must be mapped since functions are unaware of the new and magical creatures in 4x. # Do not map the iterative functions, they are capable of dealing with 4x API, and they do # call out to lambdas, and thus, given arguments needs to be preserved (instead of transforming to # '' when undefined). TODO: The iterative functions should be refactored to use the new function API # directly, when this has been done, this special filtering out can be removed # NOTE: Passing an empty string last converts :undef to empty string mapped_args = args.map {|a| convert(a, scope, '') } result = scope.send("function_#{name}", mapped_args) # Prevent non r-value functions from leaking their result (they are not written to care about this) Puppet::Parser::Functions.rvalue?(name) ? result : nil end # The o is used for source reference def create_resource_parameter(o, scope, name, value, operator) file, line = extract_file_line(o) Puppet::Parser::Resource::Param.new( :name => name, :value => convert(value, scope, :undef), # converted to 3x since 4x supports additional objects / types :source => scope.source, :line => line, :file => file, :add => operator == :'+>' ) end def create_resources(o, scope, virtual, exported, type_name, resource_titles, evaluated_parameters) # TODO: Unknown resource causes creation of Resource to fail with ArgumentError, should give # a proper Issue. Now the result is "Error while evaluating a Resource Statement" with the message # from the raised exception. (It may be good enough). # resolve in scope. fully_qualified_type, resource_titles = scope.resolve_type_and_titles(type_name, resource_titles) # Not 100% accurate as this is the resource expression location and each title is processed separately # The titles are however the result of evaluation and they have no location at this point (an array # of positions for the source expressions are required for this to work). # TODO: Revisit and possible improve the accuracy. # file, line = extract_file_line(o) # Build a resource for each title resource_titles.map do |resource_title| resource = Puppet::Parser::Resource.new( fully_qualified_type, resource_title, :parameters => evaluated_parameters, :file => file, :line => line, :exported => exported, :virtual => virtual, # WTF is this? Which source is this? The file? The name of the context ? :source => scope.source, :scope => scope, :strict => true ) if resource.resource_type.is_a? Puppet::Resource::Type resource.resource_type.instantiate_resource(scope, resource) end scope.compiler.add_resource(scope, resource) scope.compiler.evaluate_classes([resource_title], scope, false, true) if fully_qualified_type == 'class' # Turn the resource into a PType (a reference to a resource type) # weed out nil's resource_to_ptype(resource) end end # Defines default parameters for a type with the given name. # def create_resource_defaults(o, scope, type_name, evaluated_parameters) # Note that name must be capitalized in this 3x call # The 3x impl creates a Resource instance with a bogus title and then asks the created resource # for the type of the name. # Note, locations are available per parameter. # scope.define_settings(capitalize_qualified_name(type_name), evaluated_parameters) end # Capitalizes each segment of a qualified name # def capitalize_qualified_name(name) name.split(/::/).map(&:capitalize).join('::') end # Creates resource overrides for all resource type objects in evaluated_resources. The same set of # evaluated parameters are applied to all. # def create_resource_overrides(o, scope, evaluated_resources, evaluated_parameters) # Not 100% accurate as this is the resource expression location and each title is processed separately # The titles are however the result of evaluation and they have no location at this point (an array # of positions for the source expressions are required for this to work. # TODO: Revisit and possible improve the accuracy. # file, line = extract_file_line(o) evaluated_resources.each do |r| resource = Puppet::Parser::Resource.new( r.type_name, r.title, :parameters => evaluated_parameters, :file => file, :line => line, # WTF is this? Which source is this? The file? The name of the context ? :source => scope.source, :scope => scope ) scope.compiler.add_override(resource) end end # Finds a resource given a type and a title. # def find_resource(scope, type_name, title) scope.compiler.findresource(type_name, title) end # Returns the value of a resource's parameter by first looking up the parameter in the resource # and then in the defaults for the resource. Since the resource exists (it must in order to look up its # parameters, any overrides have already been applied). Defaults are not applied to a resource until it # has been finished (which typically has not taken place when this is evaluated; hence the dual lookup). # def get_resource_parameter_value(scope, resource, parameter_name) # This gets the parameter value, or nil (for both valid parameters and parameters that do not exist). val = resource[parameter_name] if val.nil? && defaults = scope.lookupdefaults(resource.type) # NOTE: 3x resource keeps defaults as hash using symbol for name as key to Parameter which (again) holds # name and value. # NOTE: meta parameters that are unset ends up here, and there are no defaults for those encoded # in the defaults, they may receive hardcoded defaults later (e.g. 'tag'). param = defaults[parameter_name.to_sym] # Some parameters (meta parameters like 'tag') does not return a param from which the value can be obtained # at all times. Instead, they return a nil param until a value has been set. val = param.nil? ? nil : param.value end val end # Returns true, if the given name is the name of a resource parameter. # def is_parameter_of_resource?(scope, resource, name) resource.valid_parameter?(name) end def resource_to_ptype(resource) nil if resource.nil? type_calculator.infer(resource) end # This is the same type of "truth" as used in the current Puppet DSL. # def is_true? o # Is the value true? This allows us to control the definition of truth # in one place. case o when :undef false else !!o end end # Utility method for TrueClass || FalseClass # @param x [Object] the object to test if it is instance of TrueClass or FalseClass def is_boolean? x x.is_a?(TrueClass) || x.is_a?(FalseClass) end def initialize @@convert_visitor ||= Puppet::Pops::Visitor.new(self, "convert", 2, 2) end # Converts 4x supported values to 3x values. This is required because # resources and other objects do not know about the new type system, and does not support # regular expressions. Unfortunately this has to be done for array and hash as well. # A complication is that catalog types needs to be resolved against the scope. # def convert(o, scope, undef_value) @@convert_visitor.visit_this_2(self, o, scope, undef_value) end def convert_NilClass(o, scope, undef_value) undef_value end def convert_Object(o, scope, undef_value) o end def convert_Array(o, scope, undef_value) o.map {|x| convert(x, scope, undef_value) } end def convert_Hash(o, scope, undef_value) result = {} o.each {|k,v| result[convert(k, scope, undef_value)] = convert(v, scope, undef_value) } result end def convert_Regexp(o, scope, undef_value) # Puppet 3x cannot handle parameter values that are reqular expressions. Turn into regexp string in # source form o.inspect end def convert_Symbol(o, scope, undef_value) case o when :undef undef_value # 3x wants :undef as empty string in function else o # :default, and all others are verbatim since they are new in future evaluator end end def convert_PAbstractType(o, scope, undef_value) o end def convert_PCatalogEntryType(o, scope, undef_value) # Since 4x does not support dynamic scoping, all names are absolute and can be # used as is (with some check/transformation/mangling between absolute/relative form # due to Puppet::Resource's idiosyncratic behavior where some references must be # absolute and others cannot be. # Thus there is no need to call scope.resolve_type_and_titles to do dynamic lookup. Puppet::Resource.new(*catalog_type_to_split_type_title(o)) end private # Produces an array with [type, title] from a PCatalogEntryType # This method is used to produce the arguments for creation of reference resource instances # (used when 3x is operating on a resource). # Ensures that resources are *not* absolute. # def catalog_type_to_split_type_title(catalog_type) split_type = catalog_type.is_a?(Puppet::Pops::Types::PType) ? catalog_type.type : catalog_type case split_type when Puppet::Pops::Types::PHostClassType class_name = split_type.class_name ['class', class_name.nil? ? nil : class_name.sub(/^::/, '')] when Puppet::Pops::Types::PResourceType type_name = split_type.type_name title = split_type.title if type_name =~ /^(::)?[Cc]lass/ ['class', title.nil? ? nil : title.sub(/^::/, '')] else # Ensure that title is '' if nil # Resources with absolute name always results in error because tagging does not support leading :: [type_name.nil? ? nil : type_name.sub(/^::/, ''), title.nil? ? '' : title] end else raise ArgumentError, "Cannot split the type #{catalog_type.class}, it represents neither a PHostClassType, nor a PResourceType." end end def extract_file_line(o) source_pos = Puppet::Pops::Utils.find_closest_positioned(o) return [nil, -1] unless source_pos [source_pos.locator.file, source_pos.line] end def find_closest_positioned(o) return nil if o.nil? || o.is_a?(Puppet::Pops::Model::Program) o.offset.nil? ? find_closest_positioned(o.eContainer) : Puppet::Pops::Adapters::SourcePosAdapter.adapt(o) end # Creates a diagnostic producer def diagnostic_producer Puppet::Pops::Validation::DiagnosticProducer.new( ExceptionRaisingAcceptor.new(), # Raises exception on all issues SeverityProducer.new(), # All issues are errors Puppet::Pops::Model::ModelLabelProvider.new()) end # Configure the severity of failures class SeverityProducer < Puppet::Pops::Validation::SeverityProducer Issues = Puppet::Pops::Issues def initialize super p = self # Issues triggering warning only if --debug is on if Puppet[:debug] p[Issues::EMPTY_RESOURCE_SPECIALIZATION] = :warning else p[Issues::EMPTY_RESOURCE_SPECIALIZATION] = :ignore end end end # An acceptor of diagnostics that immediately raises an exception. class ExceptionRaisingAcceptor < Puppet::Pops::Validation::Acceptor def accept(diagnostic) super Puppet::Pops::IssueReporter.assert_and_report(self, {:message => "Evaluation Error:", :emit_warnings => true }) if errors? raise ArgumentError, "Internal Error: Configuration of runtime error handling wrong: should have raised exception" end end end class EvaluationError < StandardError end end diff --git a/spec/unit/pops/evaluator/evaluating_parser_spec.rb b/spec/unit/pops/evaluator/evaluating_parser_spec.rb index 8ea6399a2..1543c7026 100644 --- a/spec/unit/pops/evaluator/evaluating_parser_spec.rb +++ b/spec/unit/pops/evaluator/evaluating_parser_spec.rb @@ -1,1262 +1,1275 @@ require 'spec_helper' require 'puppet/pops' require 'puppet/pops/evaluator/evaluator_impl' require 'puppet/loaders' require 'puppet_spec/pops' require 'puppet_spec/scope' require 'puppet/parser/e4_parser_adapter' # relative to this spec file (./) does not work as this file is loaded by rspec #require File.join(File.dirname(__FILE__), '/evaluator_rspec_helper') describe 'Puppet::Pops::Evaluator::EvaluatorImpl' do include PuppetSpec::Pops include PuppetSpec::Scope before(:each) do Puppet[:strict_variables] = true # These must be set since the 3x logic switches some behaviors on these even if the tests explicitly # use the 4x parser and evaluator. # Puppet[:parser] = 'future' Puppet[:evaluator] = 'future' # Puppetx cannot be loaded until the correct parser has been set (injector is turned off otherwise) require 'puppetx' # Tests needs a known configuration of node/scope/compiler since it parses and evaluates # snippets as the compiler will evaluate them, butwithout the overhead of compiling a complete # catalog for each tested expression. # @parser = Puppet::Pops::Parser::EvaluatingParser::Transitional.new @node = Puppet::Node.new('node.example.com') @node.environment = Puppet::Node::Environment.create(:testing, []) @compiler = Puppet::Parser::Compiler.new(@node) @scope = Puppet::Parser::Scope.new(@compiler) @scope.source = Puppet::Resource::Type.new(:node, 'node.example.com') @scope.parent = @compiler.topscope end let(:parser) { @parser } let(:scope) { @scope } types = Puppet::Pops::Types::TypeFactory context "When evaluator evaluates literals" do { "1" => 1, "010" => 8, "0x10" => 16, "3.14" => 3.14, "0.314e1" => 3.14, "31.4e-1" => 3.14, "'1'" => '1', "'banana'" => 'banana', '"banana"' => 'banana', "banana" => 'banana', "banana::split" => 'banana::split', "false" => false, "true" => true, "Array" => types.array_of_data(), "/.*/" => /.*/ }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end end context "When the evaluator evaluates Lists and Hashes" do { "[]" => [], "[1,2,3]" => [1,2,3], "[1,[2.0, 2.1, [2.2]],[3.0, 3.1]]" => [1,[2.0, 2.1, [2.2]],[3.0, 3.1]], "[2 + 2]" => [4], "[1,2,3] == [1,2,3]" => true, "[1,2,3] != [2,3,4]" => true, "[1,2,3] == [2,2,3]" => false, "[1,2,3] != [1,2,3]" => false, "[1,2,3][2]" => 3, "[1,2,3] + [4,5]" => [1,2,3,4,5], "[1,2,3] + [[4,5]]" => [1,2,3,[4,5]], "[1,2,3] + 4" => [1,2,3,4], "[1,2,3] << [4,5]" => [1,2,3,[4,5]], "[1,2,3] << {'a' => 1, 'b'=>2}" => [1,2,3,{'a' => 1, 'b'=>2}], "[1,2,3] << 4" => [1,2,3,4], "[1,2,3,4] - [2,3]" => [1,4], "[1,2,3,4] - [2,5]" => [1,3,4], "[1,2,3,4] - 2" => [1,3,4], "[1,2,3,[2],4] - 2" => [1,3,[2],4], "[1,2,3,[2,3],4] - [[2,3]]" => [1,2,3,4], "[1,2,3,3,2,4,2,3] - [2,3]" => [1,4], "[1,2,3,['a',1],['b',2]] - {'a' => 1, 'b'=>2}" => [1,2,3], "[1,2,3,{'a'=>1,'b'=>2}] - [{'a' => 1, 'b'=>2}]" => [1,2,3], }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "[1,2,3] + {'a' => 1, 'b'=>2}" => [1,2,3,['a',1],['b',2]], }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do # This test must be done with match_array since the order of the hash # is undefined and Ruby 1.8.7 and 1.9.3 produce different results. expect(parser.evaluate_string(scope, source, __FILE__)).to match_array(result) end end { "[1,2,3][a]" => :error, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end { "{}" => {}, "{'a'=>1,'b'=>2}" => {'a'=>1,'b'=>2}, "{'a'=>1,'b'=>{'x'=>2.1,'y'=>2.2}}" => {'a'=>1,'b'=>{'x'=>2.1,'y'=>2.2}}, "{'a'=> 2 + 2}" => {'a'=> 4}, "{'a'=> 1, 'b'=>2} == {'a'=> 1, 'b'=>2}" => true, "{'a'=> 1, 'b'=>2} != {'x'=> 1, 'b'=>2}" => true, "{'a'=> 1, 'b'=>2} == {'a'=> 2, 'b'=>3}" => false, "{'a'=> 1, 'b'=>2} != {'a'=> 1, 'b'=>2}" => false, "{a => 1, b => 2}[b]" => 2, "{2+2 => sum, b => 2}[4]" => 'sum', "{'a'=>1, 'b'=>2} + {'c'=>3}" => {'a'=>1,'b'=>2,'c'=>3}, "{'a'=>1, 'b'=>2} + {'b'=>3}" => {'a'=>1,'b'=>3}, "{'a'=>1, 'b'=>2} + ['c', 3, 'b', 3]" => {'a'=>1,'b'=>3, 'c'=>3}, "{'a'=>1, 'b'=>2} + [['c', 3], ['b', 3]]" => {'a'=>1,'b'=>3, 'c'=>3}, "{'a'=>1, 'b'=>2} - {'b' => 3}" => {'a'=>1}, "{'a'=>1, 'b'=>2, 'c'=>3} - ['b', 'c']" => {'a'=>1}, "{'a'=>1, 'b'=>2, 'c'=>3} - 'c'" => {'a'=>1, 'b'=>2}, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "{'a' => 1, 'b'=>2} << 1" => :error, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end end context "When the evaluator perform comparisons" do { "'a' == 'a'" => true, "'a' == 'b'" => false, "'a' != 'a'" => false, "'a' != 'b'" => true, "'a' < 'b' " => true, "'a' < 'a' " => false, "'b' < 'a' " => false, "'a' <= 'b'" => true, "'a' <= 'a'" => true, "'b' <= 'a'" => false, "'a' > 'b' " => false, "'a' > 'a' " => false, "'b' > 'a' " => true, "'a' >= 'b'" => false, "'a' >= 'a'" => true, "'b' >= 'a'" => true, "'a' == 'A'" => true, "'a' != 'A'" => false, "'a' > 'A'" => false, "'a' >= 'A'" => true, "'A' < 'a'" => false, "'A' <= 'a'" => true, "1 == 1" => true, "1 == 2" => false, "1 != 1" => false, "1 != 2" => true, "1 < 2 " => true, "1 < 1 " => false, "2 < 1 " => false, "1 <= 2" => true, "1 <= 1" => true, "2 <= 1" => false, "1 > 2 " => false, "1 > 1 " => false, "2 > 1 " => true, "1 >= 2" => false, "1 >= 1" => true, "2 >= 1" => true, "1 == 1.0 " => true, "1 < 1.1 " => true, "'1' < 1.1" => true, "1.0 == 1 " => true, "1.0 < 2 " => true, "1.0 < 'a'" => true, "'1.0' < 1.1" => true, "'1.0' < 'a'" => true, "'1.0' < '' " => true, "'1.0' < ' '" => true, "'a' > '1.0'" => true, "/.*/ == /.*/ " => true, "/.*/ != /a.*/" => true, "true == true " => true, "false == false" => true, "true == false" => false, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "'a' =~ /.*/" => true, "'a' =~ '.*'" => true, "/.*/ != /a.*/" => true, "'a' !~ /b.*/" => true, "'a' !~ 'b.*'" => true, '$x = a; a =~ "$x.*"' => true, "a =~ Pattern['a.*']" => true, "a =~ Regexp['a.*']" => false, # String is not subtype of Regexp. PUP-957 "$x = /a.*/ a =~ $x" => true, "$x = Pattern['a.*'] a =~ $x" => true, "1 =~ Integer" => true, "1 !~ Integer" => false, "[1,2,3] =~ Array[Integer[1,10]]" => true, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "666 =~ /6/" => :error, "[a] =~ /a/" => :error, "{a=>1} =~ /a/" => :error, "/a/ =~ /a/" => :error, "Array =~ /A/" => :error, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end { "1 in [1,2,3]" => true, "4 in [1,2,3]" => false, "a in {x=>1, a=>2}" => true, "z in {x=>1, a=>2}" => false, "ana in bananas" => true, "xxx in bananas" => false, "/ana/ in bananas" => true, "/xxx/ in bananas" => false, "ANA in bananas" => false, # ANA is a type, not a String "String[1] in bananas" => false, # Philosophically true though :-) "'ANA' in bananas" => true, "ana in 'BANANAS'" => true, "/ana/ in 'BANANAS'" => false, "/ANA/ in 'BANANAS'" => true, "xxx in 'BANANAS'" => false, "[2,3] in [1,[2,3],4]" => true, "[2,4] in [1,[2,3],4]" => false, "[a,b] in ['A',['A','B'],'C']" => true, "[x,y] in ['A',['A','B'],'C']" => false, "a in {a=>1}" => true, "x in {a=>1}" => false, "'A' in {a=>1}" => true, "'X' in {a=>1}" => false, "a in {'A'=>1}" => true, "x in {'A'=>1}" => false, "/xxx/ in {'aaaxxxbbb'=>1}" => true, "/yyy/ in {'aaaxxxbbb'=>1}" => false, "15 in [1, 0xf]" => true, "15 in [1, '0xf']" => true, "'15' in [1, 0xf]" => true, "15 in [1, 115]" => false, "1 in [11, '111']" => false, "'1' in [11, '111']" => false, "Array[Integer] in [2, 3]" => false, "Array[Integer] in [2, [3, 4]]" => true, "Array[Integer] in [2, [a, 4]]" => false, "Integer in { 2 =>'a'}" => true, "Integer[5,10] in [1,5,3]" => true, "Integer[5,10] in [1,2,3]" => false, "Integer in {'a'=>'a'}" => false, "Integer in {'a'=>1}" => false, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end + { + "if /(ana)/ in bananas {$1}" => 'ana', + "if /(xyz)/ in bananas {$1} else {$1}" => nil, + "$a = bananas =~ /(ana)/; $b = /(xyz)/ in bananas; $1" => 'ana', + "$a = xyz =~ /(xyz)/; $b = /(ana)/ in bananas; $1" => 'ana', + "if /p/ in [pineapple, bananas] {$0}" => 'p', + "if /b/ in [pineapple, bananas] {$0}" => 'b', + }.each do |source, result| + it "sets match variables for a regexp search using in such that '#{source}' produces '#{result}'" do + parser.evaluate_string(scope, source, __FILE__).should == result + end + end + { 'Any' => ['Data', 'Scalar', 'Numeric', 'Integer', 'Float', 'Boolean', 'String', 'Pattern', 'Collection', 'Array', 'Hash', 'CatalogEntry', 'Resource', 'Class', 'Undef', 'File', 'NotYetKnownResourceType'], # Note, Data > Collection is false (so not included) 'Data' => ['Scalar', 'Numeric', 'Integer', 'Float', 'Boolean', 'String', 'Pattern', 'Array', 'Hash',], 'Scalar' => ['Numeric', 'Integer', 'Float', 'Boolean', 'String', 'Pattern'], 'Numeric' => ['Integer', 'Float'], 'CatalogEntry' => ['Class', 'Resource', 'File', 'NotYetKnownResourceType'], 'Integer[1,10]' => ['Integer[2,3]'], }.each do |general, specials| specials.each do |special | it "should compute that #{general} > #{special}" do parser.evaluate_string(scope, "#{general} > #{special}", __FILE__).should == true end it "should compute that #{special} < #{general}" do parser.evaluate_string(scope, "#{special} < #{general}", __FILE__).should == true end it "should compute that #{general} != #{special}" do parser.evaluate_string(scope, "#{special} != #{general}", __FILE__).should == true end end end { 'Integer[1,10] > Integer[2,3]' => true, 'Integer[1,10] == Integer[2,3]' => false, 'Integer[1,10] > Integer[0,5]' => false, 'Integer[1,10] > Integer[1,10]' => false, 'Integer[1,10] >= Integer[1,10]' => true, 'Integer[1,10] == Integer[1,10]' => true, }.each do |source, result| it "should parse and evaluate the integer range comparison expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end end context "When the evaluator performs arithmetic" do context "on Integers" do { "2+2" => 4, "2 + 2" => 4, "7 - 3" => 4, "6 * 3" => 18, "6 / 3" => 2, "6 % 3" => 0, "10 % 3" => 1, "-(6/3)" => -2, "-6/3 " => -2, "8 >> 1" => 4, "8 << 1" => 16, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end context "on Floats" do { "2.2 + 2.2" => 4.4, "7.7 - 3.3" => 4.4, "6.1 * 3.1" => 18.91, "6.6 / 3.3" => 2.0, "-(6.0/3.0)" => -2.0, "-6.0/3.0 " => -2.0, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "3.14 << 2" => :error, "3.14 >> 2" => :error, "6.6 % 3.3" => 0.0, "10.0 % 3.0" => 1.0, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end end context "on strings requiring boxing to Numeric" do { "'2' + '2'" => 4, "'-2' + '2'" => 0, "'- 2' + '2'" => 0, '"-\t 2" + "2"' => 0, "'+2' + '2'" => 4, "'+ 2' + '2'" => 4, "'2.2' + '2.2'" => 4.4, "'-2.2' + '2.2'" => 0.0, "'0xF7' + '010'" => 0xFF, "'0xF7' + '0x8'" => 0xFF, "'0367' + '010'" => 0xFF, "'012.3' + '010'" => 20.3, "'-0x2' + '0x4'" => 2, "'+0x2' + '0x4'" => 6, "'-02' + '04'" => 2, "'+02' + '04'" => 6, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "'0888' + '010'" => :error, "'0xWTF' + '010'" => :error, "'0x12.3' + '010'" => :error, "'0x12.3' + '010'" => :error, '"-\n 2" + "2"' => :error, '"-\v 2" + "2"' => :error, '"-2\n" + "2"' => :error, '"-2\n " + "2"' => :error, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end end end end # arithmetic context "When the evaluator evaluates assignment" do { "$a = 5" => 5, "$a = 5; $a" => 5, "$a = 5; $b = 6; $a" => 5, "$a = $b = 5; $a == $b" => true, "$a = [1,2,3]; [x].map |$x| { $a += x; $a }" => [[1,2,3,'x']], "$a = [a,x,c]; [x].map |$x| { $a -= x; $a }" => [['a','c']], }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "[a,b,c] = [1,2,3]; $a == 1 and $b == 2 and $c == 3" => :error, "[a,b,c] = {b=>2,c=>3,a=>1}; $a == 1 and $b == 2 and $c == 3" => :error, "$a = [1,2,3]; [x].collect |$x| { [a] += x; $a }" => :error, "$a = [a,x,c]; [x].collect |$x| { [a] -= x; $a }" => :error, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do expect { parser.evaluate_string(scope, source, __FILE__)}.to raise_error(Puppet::ParseError) end end end context "When the evaluator evaluates conditionals" do { "if true {5}" => 5, "if false {5}" => nil, "if false {2} else {5}" => 5, "if false {2} elsif true {5}" => 5, "if false {2} elsif false {5}" => nil, "unless false {5}" => 5, "unless true {5}" => nil, "unless true {2} else {5}" => 5, "$a = if true {5} $a" => 5, "$a = if false {5} $a" => nil, "$a = if false {2} else {5} $a" => 5, "$a = if false {2} elsif true {5} $a" => 5, "$a = if false {2} elsif false {5} $a" => nil, "$a = unless false {5} $a" => 5, "$a = unless true {5} $a" => nil, "$a = unless true {2} else {5} $a" => 5, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "case 1 { 1 : { yes } }" => 'yes', "case 2 { 1,2,3 : { yes} }" => 'yes', "case 2 { 1,3 : { no } 2: { yes} }" => 'yes', "case 2 { 1,3 : { no } 5: { no } default: { yes }}" => 'yes', "case 2 { 1,3 : { no } 5: { no } }" => nil, "case 'banana' { 1,3 : { no } /.*ana.*/: { yes } }" => 'yes', "case 'banana' { /.*(ana).*/: { $1 } }" => 'ana', "case [1] { Array : { yes } }" => 'yes', "case [1] { Array[String] : { no } Array[Integer]: { yes } }" => 'yes', "case 1 { Integer : { yes } Type[Integer] : { no } }" => 'yes', "case Integer { Integer : { no } Type[Integer] : { yes } }" => 'yes', # supports unfold "case ringo { *[paul, john, ringo, george] : { 'beatle' } }" => 'beatle', }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "2 ? { 1 => no, 2 => yes}" => 'yes', "3 ? { 1 => no, 2 => no, default => yes }" => 'yes', "3 ? { 1 => no, default => yes, 3 => no }" => 'no', "3 ? { 1 => no, 3 => no, default => yes }" => 'no', "4 ? { 1 => no, default => yes, 3 => no }" => 'yes', "4 ? { 1 => no, 3 => no, default => yes }" => 'yes', "'banana' ? { /.*(ana).*/ => $1 }" => 'ana', "[2] ? { Array[String] => yes, Array => yes}" => 'yes', "ringo ? *[paul, john, ringo, george] => 'beatle'" => 'beatle', }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end it 'fails if a selector does not match' do expect{parser.evaluate_string(scope, "2 ? 3 => 4")}.to raise_error(/No matching entry for selector parameter with value '2'/) end end context "When evaluator evaluated unfold" do { "*[1,2,3]" => [1,2,3], "*1" => [1], "*'a'" => ['a'] }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end it "should parse and evaluate the expression '*{a=>10, b=>20} to [['a',10],['b',20]]" do result = parser.evaluate_string(scope, '*{a=>10, b=>20}', __FILE__) expect(result).to include(['a', 10]) expect(result).to include(['b', 20]) end end context "When evaluator performs [] operations" do { "[1,2,3][0]" => 1, "[1,2,3][2]" => 3, "[1,2,3][3]" => nil, "[1,2,3][-1]" => 3, "[1,2,3][-2]" => 2, "[1,2,3][-4]" => nil, "[1,2,3,4][0,2]" => [1,2], "[1,2,3,4][1,3]" => [2,3,4], "[1,2,3,4][-2,2]" => [3,4], "[1,2,3,4][-3,2]" => [2,3], "[1,2,3,4][3,5]" => [4], "[1,2,3,4][5,2]" => [], "[1,2,3,4][0,-1]" => [1,2,3,4], "[1,2,3,4][0,-2]" => [1,2,3], "[1,2,3,4][0,-4]" => [1], "[1,2,3,4][0,-5]" => [], "[1,2,3,4][-5,2]" => [1], "[1,2,3,4][-5,-3]" => [1,2], "[1,2,3,4][-6,-3]" => [1,2], "[1,2,3,4][2,-3]" => [], "[1,*[2,3],4]" => [1,2,3,4], "[1,*[2,3],4][1]" => 2, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "{a=>1, b=>2, c=>3}[a]" => 1, "{a=>1, b=>2, c=>3}[c]" => 3, "{a=>1, b=>2, c=>3}[x]" => nil, "{a=>1, b=>2, c=>3}[c,b]" => [3,2], "{a=>1, b=>2, c=>3}[a,b,c]" => [1,2,3], "{a=>{b=>{c=>'it works'}}}[a][b][c]" => 'it works', "$a = {undef => 10} $a[free_lunch]" => nil, "$a = {undef => 10} $a[undef]" => 10, "$a = {undef => 10} $a[$a[free_lunch]]" => 10, "$a = {} $a[free_lunch] == undef" => true, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "'abc'[0]" => 'a', "'abc'[2]" => 'c', "'abc'[-1]" => 'c', "'abc'[-2]" => 'b', "'abc'[-3]" => 'a', "'abc'[-4]" => '', "'abc'[3]" => '', "abc[0]" => 'a', "abc[2]" => 'c', "abc[-1]" => 'c', "abc[-2]" => 'b', "abc[-3]" => 'a', "abc[-4]" => '', "abc[3]" => '', "'abcd'[0,2]" => 'ab', "'abcd'[1,3]" => 'bcd', "'abcd'[-2,2]" => 'cd', "'abcd'[-3,2]" => 'bc', "'abcd'[3,5]" => 'd', "'abcd'[5,2]" => '', "'abcd'[0,-1]" => 'abcd', "'abcd'[0,-2]" => 'abc', "'abcd'[0,-4]" => 'a', "'abcd'[0,-5]" => '', "'abcd'[-5,2]" => 'a', "'abcd'[-5,-3]" => 'ab', "'abcd'[-6,-3]" => 'ab', "'abcd'[2,-3]" => '', }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end # Type operations (full set tested by tests covering type calculator) { "Array[Integer]" => types.array_of(types.integer), "Array[Integer,1]" => types.constrain_size(types.array_of(types.integer),1, :default), "Array[Integer,1,2]" => types.constrain_size(types.array_of(types.integer),1, 2), "Array[Integer,Integer[1,2]]" => types.constrain_size(types.array_of(types.integer),1, 2), "Array[Integer,Integer[1]]" => types.constrain_size(types.array_of(types.integer),1, :default), "Hash[Integer,Integer]" => types.hash_of(types.integer, types.integer), "Hash[Integer,Integer,1]" => types.constrain_size(types.hash_of(types.integer, types.integer),1, :default), "Hash[Integer,Integer,1,2]" => types.constrain_size(types.hash_of(types.integer, types.integer),1, 2), "Hash[Integer,Integer,Integer[1,2]]" => types.constrain_size(types.hash_of(types.integer, types.integer),1, 2), "Hash[Integer,Integer,Integer[1]]" => types.constrain_size(types.hash_of(types.integer, types.integer),1, :default), "Resource[File]" => types.resource('File'), "Resource['File']" => types.resource(types.resource('File')), "File[foo]" => types.resource('file', 'foo'), "File[foo, bar]" => [types.resource('file', 'foo'), types.resource('file', 'bar')], "Pattern[a, /b/, Pattern[c], Regexp[d]]" => types.pattern('a', 'b', 'c', 'd'), "String[1,2]" => types.constrain_size(types.string,1, 2), "String[Integer[1,2]]" => types.constrain_size(types.string,1, 2), "String[Integer[1]]" => types.constrain_size(types.string,1, :default), }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end # LHS where [] not supported, and missing key(s) { "Array[]" => :error, "'abc'[]" => :error, "Resource[]" => :error, "File[]" => :error, "String[]" => :error, "1[]" => :error, "3.14[]" => :error, "/.*/[]" => :error, "$a=[1] $a[]" => :error, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do expect { parser.evaluate_string(scope, source, __FILE__)}.to raise_error(/Syntax error/) end end # Errors when wrong number/type of keys are used { "Array[0]" => 'Array-Type[] arguments must be types. Got Fixnum', "Hash[0]" => 'Hash-Type[] arguments must be types. Got Fixnum', "Hash[Integer, 0]" => 'Hash-Type[] arguments must be types. Got Fixnum', "Array[Integer,1,2,3]" => 'Array-Type[] accepts 1 to 3 arguments. Got 4', "Array[Integer,String]" => "A Type's size constraint arguments must be a single Integer type, or 1-2 integers (or default). Got a String-Type", "Hash[Integer,String, 1,2,3]" => 'Hash-Type[] accepts 1 to 4 arguments. Got 5', "'abc'[x]" => "The value 'x' cannot be converted to Numeric", "'abc'[1.0]" => "A String[] cannot use Float where Integer is expected", "'abc'[1,2,3]" => "String supports [] with one or two arguments. Got 3", "Resource[0]" => 'First argument to Resource[] must be a resource type or a String. Got Fixnum', "Resource[a, 0]" => 'Error creating type specialization of a Resource-Type, Cannot use Fixnum where String is expected', "File[0]" => 'Error creating type specialization of a File-Type, Cannot use Fixnum where String is expected', "String[a]" => "A Type's size constraint arguments must be a single Integer type, or 1-2 integers (or default). Got a String", "Pattern[0]" => 'Error creating type specialization of a Pattern-Type, Cannot use Fixnum where String or Regexp or Pattern-Type or Regexp-Type is expected', "Regexp[0]" => 'Error creating type specialization of a Regexp-Type, Cannot use Fixnum where String or Regexp is expected', "Regexp[a,b]" => 'A Regexp-Type[] accepts 1 argument. Got 2', "true[0]" => "Operator '[]' is not applicable to a Boolean", "1[0]" => "Operator '[]' is not applicable to an Integer", "3.14[0]" => "Operator '[]' is not applicable to a Float", "/.*/[0]" => "Operator '[]' is not applicable to a Regexp", "[1][a]" => "The value 'a' cannot be converted to Numeric", "[1][0.0]" => "An Array[] cannot use Float where Integer is expected", "[1]['0.0']" => "An Array[] cannot use Float where Integer is expected", "[1,2][1, 0.0]" => "An Array[] cannot use Float where Integer is expected", "[1,2][1.0, -1]" => "An Array[] cannot use Float where Integer is expected", "[1,2][1, -1.0]" => "An Array[] cannot use Float where Integer is expected", }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do expect { parser.evaluate_string(scope, source, __FILE__)}.to raise_error(Regexp.new(Regexp.quote(result))) end end context "on catalog types" do it "[n] gets resource parameter [n]" do source = "notify { 'hello': message=>'yo'} Notify[hello][message]" parser.evaluate_string(scope, source, __FILE__).should == 'yo' end it "[n] gets class parameter [n]" do source = "class wonka($produces='chocolate'){ } include wonka Class[wonka][produces]" # This is more complicated since it needs to run like 3.x and do an import_ast adapted_parser = Puppet::Parser::E4ParserAdapter.new adapted_parser.file = __FILE__ ast = adapted_parser.parse(source) Puppet.override({:global_scope => scope}, "test") do scope.known_resource_types.import_ast(ast, '') ast.code.safeevaluate(scope).should == 'chocolate' end end # Resource default and override expressions and resource parameter access with [] { # Properties "notify { id: message=>explicit} Notify[id][message]" => "explicit", "Notify { message=>by_default} notify {foo:} Notify[foo][message]" => "by_default", "notify {foo:} Notify[foo]{message =>by_override} Notify[foo][message]" => "by_override", # Parameters "notify { id: withpath=>explicit} Notify[id][withpath]" => "explicit", "Notify { withpath=>by_default } notify { foo: } Notify[foo][withpath]" => "by_default", "notify {foo:} Notify[foo]{withpath=>by_override} Notify[foo][withpath]" => "by_override", # Metaparameters "notify { foo: tag => evoe} Notify[foo][tag]" => "evoe", # Does not produce the defaults for tag parameter (title, type or names of scopes) "notify { foo: } Notify[foo][tag]" => nil, # But a default may be specified on the type "Notify { tag=>by_default } notify { foo: } Notify[foo][tag]" => "by_default", "Notify { tag=>by_default } notify { foo: } Notify[foo]{ tag=>by_override } Notify[foo][tag]" => "by_override", }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end # Virtual and realized resource default and overridden resource parameter access with [] { # Properties "@notify { id: message=>explicit } Notify[id][message]" => "explicit", "@notify { id: message=>explicit } realize Notify[id] Notify[id][message]" => "explicit", "Notify { message=>by_default } @notify { id: } Notify[id][message]" => "by_default", "Notify { message=>by_default } @notify { id: tag=>thisone } Notify <| tag == thisone |>; Notify[id][message]" => "by_default", "@notify { id: } Notify[id]{message=>by_override} Notify[id][message]" => "by_override", # Parameters "@notify { id: withpath=>explicit } Notify[id][withpath]" => "explicit", "Notify { withpath=>by_default } @notify { id: } Notify[id][withpath]" => "by_default", "@notify { id: } realize Notify[id] Notify[id]{withpath=>by_override} Notify[id][withpath]" => "by_override", # Metaparameters "@notify { id: tag=>explicit } Notify[id][tag]" => "explicit", }.each do |source, result| it "parses and evaluates virtual and realized resources in the expression '#{source}' to #{result}" do expect(parser.evaluate_string(scope, source, __FILE__)).to eq(result) end end # Exported resource attributes { "@@notify { id: message=>explicit } Notify[id][message]" => "explicit", "@@notify { id: message=>explicit, tag=>thisone } Notify <<| tag == thisone |>> Notify[id][message]" => "explicit", }.each do |source, result| it "parses and evaluates exported resources in the expression '#{source}' to #{result}" do expect(parser.evaluate_string(scope, source, __FILE__)).to eq(result) end end # Resource default and override expressions and resource parameter access error conditions { "notify { xid: message=>explicit} Notify[id][message]" => /Resource not found/, "notify { id: message=>explicit} Notify[id][mustard]" => /does not have a parameter called 'mustard'/, # NOTE: these meta-esque parameters are not recognized as such "notify { id: message=>explicit} Notify[id][title]" => /does not have a parameter called 'title'/, "notify { id: message=>explicit} Notify[id]['type']" => /does not have a parameter called 'type'/, "notify { id: message=>explicit } Notify[id]{message=>override}" => /'message' is already set on Notify\[id\]/ }.each do |source, result| it "should parse '#{source}' and raise error matching #{result}" do expect { parser.evaluate_string(scope, source, __FILE__)}.to raise_error(result) end end context 'with errors' do { "Class['fail-whale']" => /Illegal name/, "Class[0]" => /An Integer cannot be used where a String is expected/, "Class[/.*/]" => /A Regexp cannot be used where a String is expected/, "Class[4.1415]" => /A Float cannot be used where a String is expected/, "Class[Integer]" => /An Integer-Type cannot be used where a String is expected/, "Class[File['tmp']]" => /A File\['tmp'\] Resource-Reference cannot be used where a String is expected/, }.each do | source, error_pattern| it "an error is flagged for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__)}.to raise_error(error_pattern) end end end end # end [] operations end context "When the evaluator performs boolean operations" do { "true and true" => true, "false and true" => false, "true and false" => false, "false and false" => false, "true or true" => true, "false or true" => true, "true or false" => true, "false or false" => false, "! true" => false, "!! true" => true, "!! false" => false, "! 'x'" => false, "! ''" => false, "! undef" => true, "! [a]" => false, "! []" => false, "! {a=>1}" => false, "! {}" => false, "true and false and '0xwtf' + 1" => false, "false or true or '0xwtf' + 1" => true, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do parser.evaluate_string(scope, source, __FILE__).should == result end end { "false || false || '0xwtf' + 1" => :error, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end end context "When evaluator performs operations on literal undef" do it "computes non existing hash lookup as undef" do parser.evaluate_string(scope, "{a => 1}[b] == undef", __FILE__).should == true parser.evaluate_string(scope, "undef == {a => 1}[b]", __FILE__).should == true end end context "When evaluator performs calls" do let(:populate) do parser.evaluate_string(scope, "$a = 10 $b = [1,2,3]") end { 'sprintf( "x%iy", $a )' => "x10y", # unfolds 'sprintf( *["x%iy", $a] )' => "x10y", '"x%iy".sprintf( $a )' => "x10y", '$b.reduce |$memo,$x| { $memo + $x }' => 6, 'reduce($b) |$memo,$x| { $memo + $x }' => 6, }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do populate parser.evaluate_string(scope, source, __FILE__).should == result end end { '"value is ${a*2} yo"' => :error, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end it "provides location information on error in unparenthesized call logic" do expect{parser.evaluate_string(scope, "include non_existing_class", __FILE__)}.to raise_error(Puppet::ParseError, /line 1\:1/) end it 'defaults can be given in a lambda and used only when arg is missing' do env_loader = @compiler.loaders.public_environment_loader fc = Puppet::Functions.create_function(:test) do dispatch :test do param 'Integer', 'count' required_block_param end def test(count, block) block.call({}, *[].fill(10, 0, count)) end end the_func = fc.new({}, env_loader) env_loader.add_entry(:function, 'test', the_func, __FILE__) expect(parser.evaluate_string(scope, "test(1) |$x, $y=20| { $x + $y}")).to eql(30) expect(parser.evaluate_string(scope, "test(2) |$x, $y=20| { $x + $y}")).to eql(20) end it 'a given undef does not select the default value' do env_loader = @compiler.loaders.public_environment_loader fc = Puppet::Functions.create_function(:test) do dispatch :test do param 'Any', 'lambda_arg' required_block_param end def test(lambda_arg, block) block.call({}, lambda_arg) end end the_func = fc.new({}, env_loader) env_loader.add_entry(:function, 'test', the_func, __FILE__) expect(parser.evaluate_string(scope, "test(undef) |$x=20| { $x == undef}")).to eql(true) end end context "When evaluator performs string interpolation" do let(:populate) do parser.evaluate_string(scope, "$a = 10 $b = [1,2,3]") end { '"value is $a yo"' => "value is 10 yo", '"value is \$a yo"' => "value is $a yo", '"value is ${a} yo"' => "value is 10 yo", '"value is \${a} yo"' => "value is ${a} yo", '"value is ${$a} yo"' => "value is 10 yo", '"value is ${$a*2} yo"' => "value is 20 yo", '"value is ${sprintf("x%iy",$a)} yo"' => "value is x10y yo", '"value is ${"x%iy".sprintf($a)} yo"' => "value is x10y yo", '"value is ${[1,2,3]} yo"' => "value is [1, 2, 3] yo", '"value is ${/.*/} yo"' => "value is /.*/ yo", '$x = undef "value is $x yo"' => "value is yo", '$x = default "value is $x yo"' => "value is default yo", '$x = Array[Integer] "value is $x yo"' => "value is Array[Integer] yo", '"value is ${Array[Integer]} yo"' => "value is Array[Integer] yo", }.each do |source, result| it "should parse and evaluate the expression '#{source}' to #{result}" do populate parser.evaluate_string(scope, source, __FILE__).should == result end end it "should parse and evaluate an interpolation of a hash" do source = '"value is ${{a=>1,b=>2}} yo"' # This test requires testing against two options because a hash to string # produces a result that is unordered hashstr = {'a' => 1, 'b' => 2}.to_s alt_results = ["value is {a => 1, b => 2} yo", "value is {b => 2, a => 1} yo" ] populate parse_result = parser.evaluate_string(scope, source, __FILE__) alt_results.include?(parse_result).should == true end it 'should accept a variable with leading underscore when used directly' do source = '$_x = 10; "$_x"' expect(parser.evaluate_string(scope, source, __FILE__)).to eql('10') end it 'should accept a variable with leading underscore when used as an expression' do source = '$_x = 10; "${_x}"' expect(parser.evaluate_string(scope, source, __FILE__)).to eql('10') end { '"value is ${a*2} yo"' => :error, }.each do |source, result| it "should parse and raise error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(Puppet::ParseError) end end end context "When evaluating variables" do context "that are non existing an error is raised for" do it "unqualified variable" do expect { parser.evaluate_string(scope, "$quantum_gravity", __FILE__) }.to raise_error(/Unknown variable/) end it "qualified variable" do expect { parser.evaluate_string(scope, "$quantum_gravity::graviton", __FILE__) }.to raise_error(/Unknown variable/) end end it "a lex error should be raised for '$foo::::bar'" do expect { parser.evaluate_string(scope, "$foo::::bar") }.to raise_error(Puppet::LexError, /Illegal fully qualified name at line 1:7/) end { '$a = $0' => nil, '$a = $1' => nil, }.each do |source, value| it "it is ok to reference numeric unassigned variables '#{source}'" do parser.evaluate_string(scope, source, __FILE__).should == value end end { '$00 = 0' => /must be a decimal value/, '$0xf = 0' => /must be a decimal value/, '$0777 = 0' => /must be a decimal value/, '$123a = 0' => /must be a decimal value/, }.each do |source, error_pattern| it "should raise an error for '#{source}'" do expect { parser.evaluate_string(scope, source, __FILE__) }.to raise_error(error_pattern) end end context "an initial underscore in the last segment of a var name is allowed" do { '$_a = 1' => 1, '$__a = 1' => 1, }.each do |source, value| it "as in this example '#{source}'" do parser.evaluate_string(scope, source, __FILE__).should == value end end end end context "When evaluating relationships" do it 'should form a relation with File[a] -> File[b]' do source = "File[a] -> File[b]" parser.evaluate_string(scope, source, __FILE__) scope.compiler.should have_relationship(['File', 'a', '->', 'File', 'b']) end it 'should form a relation with resource -> resource' do source = "notify{a:} -> notify{b:}" parser.evaluate_string(scope, source, __FILE__) scope.compiler.should have_relationship(['Notify', 'a', '->', 'Notify', 'b']) end it 'should form a relation with [File[a], File[b]] -> [File[x], File[y]]' do source = "[File[a], File[b]] -> [File[x], File[y]]" parser.evaluate_string(scope, source, __FILE__) scope.compiler.should have_relationship(['File', 'a', '->', 'File', 'x']) scope.compiler.should have_relationship(['File', 'b', '->', 'File', 'x']) scope.compiler.should have_relationship(['File', 'a', '->', 'File', 'y']) scope.compiler.should have_relationship(['File', 'b', '->', 'File', 'y']) end it 'should tolerate (eliminate) duplicates in operands' do source = "[File[a], File[a]] -> File[x]" parser.evaluate_string(scope, source, __FILE__) scope.compiler.should have_relationship(['File', 'a', '->', 'File', 'x']) scope.compiler.relationships.size.should == 1 end it 'should form a relation with <-' do source = "File[a] <- File[b]" parser.evaluate_string(scope, source, __FILE__) scope.compiler.should have_relationship(['File', 'b', '->', 'File', 'a']) end it 'should form a relation with <-' do source = "File[a] <~ File[b]" parser.evaluate_string(scope, source, __FILE__) scope.compiler.should have_relationship(['File', 'b', '~>', 'File', 'a']) end end context "When evaluating heredoc" do it "evaluates plain heredoc" do src = "@(END)\nThis is\nheredoc text\nEND\n" parser.evaluate_string(scope, src).should == "This is\nheredoc text\n" end it "parses heredoc with margin" do src = [ "@(END)", " This is", " heredoc text", " | END", "" ].join("\n") parser.evaluate_string(scope, src).should == "This is\nheredoc text\n" end it "parses heredoc with margin and right newline trim" do src = [ "@(END)", " This is", " heredoc text", " |- END", "" ].join("\n") parser.evaluate_string(scope, src).should == "This is\nheredoc text" end it "parses escape specification" do src = <<-CODE @(END/t) Tex\\tt\\n |- END CODE parser.evaluate_string(scope, src).should == "Tex\tt\\n" end it "parses syntax checked specification" do src = <<-CODE @(END:json) ["foo", "bar"] |- END CODE parser.evaluate_string(scope, src).should == '["foo", "bar"]' end it "parses syntax checked specification with error and reports it" do src = <<-CODE @(END:json) ['foo', "bar"] |- END CODE expect { parser.evaluate_string(scope, src)}.to raise_error(/Cannot parse invalid JSON string/) end it "parses interpolated heredoc expression" do src = <<-CODE $name = 'Fjodor' @("END") Hello $name |- END CODE parser.evaluate_string(scope, src).should == "Hello Fjodor" end end context "Handles Deprecations and Discontinuations" do it 'of import statements' do source = "\nimport foo" # Error references position 5 at the opening '{' # Set file to nil to make it easier to match with line number (no file name in output) expect { parser.evaluate_string(scope, source) }.to raise_error(/'import' has been discontinued.*line 2:1/) end end context "Detailed Error messages are reported" do it 'for illegal type references' do source = '1+1 { "title": }' # Error references position 5 at the opening '{' # Set file to nil to make it easier to match with line number (no file name in output) expect { parser.parse_string(source, nil) }.to raise_error(/Expression is not valid as a resource.*line 1:5/) end it 'for non r-value producing <| |>' do expect { parser.parse_string("$a = File <| |>", nil) }.to raise_error(/A Virtual Query does not produce a value at line 1:6/) end it 'for non r-value producing <<| |>>' do expect { parser.parse_string("$a = File <<| |>>", nil) }.to raise_error(/An Exported Query does not produce a value at line 1:6/) end it 'for non r-value producing define' do Puppet.expects(:err).with("Invalid use of expression. A 'define' expression does not produce a value at line 1:6") Puppet.expects(:err).with("Classes, definitions, and nodes may only appear at toplevel or inside other classes at line 1:6") expect { parser.parse_string("$a = define foo { }", nil) }.to raise_error(/2 errors/) end it 'for non r-value producing class' do Puppet.expects(:err).with("Invalid use of expression. A Host Class Definition does not produce a value at line 1:6") Puppet.expects(:err).with("Classes, definitions, and nodes may only appear at toplevel or inside other classes at line 1:6") expect { parser.parse_string("$a = class foo { }", nil) }.to raise_error(/2 errors/) end it 'for unclosed quote with indication of start position of string' do source = <<-SOURCE.gsub(/^ {6}/,'') $a = "xx yyy SOURCE # first char after opening " reported as being in error. expect { parser.parse_string(source) }.to raise_error(/Unclosed quote after '"' followed by 'xx\\nyy\.\.\.' at line 1:7/) end it 'for multiple errors with a summary exception' do Puppet.expects(:err).with("Invalid use of expression. A Node Definition does not produce a value at line 1:6") Puppet.expects(:err).with("Classes, definitions, and nodes may only appear at toplevel or inside other classes at line 1:6") expect { parser.parse_string("$a = node x { }",nil) }.to raise_error(/2 errors/) end it 'for a bad hostname' do expect { parser.parse_string("node 'macbook+owned+by+name' { }", nil) }.to raise_error(/The hostname 'macbook\+owned\+by\+name' contains illegal characters.*at line 1:6/) end it 'for a hostname with interpolation' do source = <<-SOURCE.gsub(/^ {6}/,'') $name = 'fred' node "macbook-owned-by$name" { } SOURCE expect { parser.parse_string(source, nil) }.to raise_error(/An interpolated expression is not allowed in a hostname of a node at line 2:23/) end end context 'does not leak variables' do it 'local variables are gone when lambda ends' do source = <<-SOURCE [1,2,3].each |$x| { $y = $x} $a = $y SOURCE expect do parser.evaluate_string(scope, source) end.to raise_error(/Unknown variable: 'y'/) end it 'lambda parameters are gone when lambda ends' do source = <<-SOURCE [1,2,3].each |$x| { $y = $x} $a = $x SOURCE expect do parser.evaluate_string(scope, source) end.to raise_error(/Unknown variable: 'x'/) end it 'does not leak match variables' do source = <<-SOURCE if 'xyz' =~ /(x)(y)(z)/ { notice $2 } case 'abc' { /(a)(b)(c)/ : { $x = $2 } } "-$x-$2-" SOURCE expect(parser.evaluate_string(scope, source)).to eq('-b--') end end matcher :have_relationship do |expected| calc = Puppet::Pops::Types::TypeCalculator.new match do |compiler| op_name = {'->' => :relationship, '~>' => :subscription} compiler.relationships.any? do | relation | relation.source.type == expected[0] && relation.source.title == expected[1] && relation.type == op_name[expected[2]] && relation.target.type == expected[3] && relation.target.title == expected[4] end end failure_message_for_should do |actual| "Relationship #{expected[0]}[#{expected[1]}] #{expected[2]} #{expected[3]}[#{expected[4]}] but was unknown to compiler" end end end