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Current File : //opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/functions/include.rb

# Declares one or more classes, causing the resources in them to be
# evaluated and added to the catalog. Accepts a class name, an array of class
# names, or a comma-separated list of class names.
#
# The `include` function can be used multiple times on the same class and will
# only declare a given class once. If a class declared with `include` has any
# parameters, Puppet will automatically look up values for them in Hiera, using
# `<class name>::<parameter name>` as the lookup key.
#
# Contrast this behavior with resource-like class declarations
# (`class {'name': parameter => 'value',}`), which must be used in only one place
# per class and can directly set parameters. You should avoid using both `include`
# and resource-like declarations with the same class.
#
# The `include` function does not cause classes to be contained in the class
# where they are declared. For that, see the `contain` function. It also
# does not create a dependency relationship between the declared class and the
# surrounding class; for that, see the `require` function.
#
# You must use the class's full name;
# relative names are not allowed. In addition to names in string form,
# you may also directly use `Class` and `Resource` `Type`-values that are produced by
# the resource and relationship expressions.
#
# - Since < 3.0.0
# - Since 4.0.0 support for class and resource type values, absolute names
# - Since 4.7.0 returns an `Array[Type[Class]]` of all included classes
#
Puppet::Functions.create_function(:include, Puppet::Functions::InternalFunction) do
  dispatch :include do
    scope_param
    # The function supports what the type system sees as Ruby runtime objects, and
    # they cannot be parameterized to find what is actually valid instances.
    # The validation is instead done in the function body itself via a call to
    # `transform_and_assert_classnames` on the calling scope.
    required_repeated_param 'Any', :names
  end

  def include(scope, *classes)
    if Puppet[:tasks]
      raise Puppet::ParseErrorWithIssue.from_issue_and_stack(
        Puppet::Pops::Issues::CATALOG_OPERATION_NOT_SUPPORTED_WHEN_SCRIPTING,
        {:operation => 'include'})
    end

    classes = scope.transform_and_assert_classnames(classes.flatten)
    result = classes.map {|name| Puppet::Pops::Types::TypeFactory.host_class(name) }
    scope.compiler.evaluate_classes(classes, scope, false)

    # Result is an Array[Class, 1, n] which allows chaining other operations
    result
  end
end

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