method

from_yaml

v1_9_3_125 - Show latest stable - Class: Gem::Specification

from_yaml(input)

public

Special loader for YAML files. When a Specification object is loaded from a YAML file, it bypasses the normal Ruby object initialization routine (#initialize). This method makes up for that and deals with gems of different ages.

input can be anything that YAML.load() accepts: String or IO.

# File lib/rubygems/specification.rb, line 486
  def self.from_yaml(input)
    input = normalize_yaml_input input
    spec = YAML.load input

    if spec && spec.class == FalseClass then
      raise Gem::EndOfYAMLException
    end

    unless Gem::Specification === spec then
      raise Gem::Exception, "YAML data doesn't evaluate to gem specification"
    end

    unless (spec.instance_variables.include? '@specification_version' or
            spec.instance_variables.include? :@specification_version) and
           spec.instance_variable_get :@specification_version
      spec.instance_variable_set :@specification_version,
                                 NONEXISTENT_SPECIFICATION_VERSION
    end

    spec
  end

from_yaml

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