Class: Dply::BaseConfig

Inherits:
Object
  • Object
show all
Defined in:
lib/dply/base_config.rb

Direct Known Subclasses

BuildConfig, DeployConfig

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BaseConfig

Returns a new instance of BaseConfig.



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# File 'lib/dply/base_config.rb', line 84

def initialize
  @opts_struct = self.class.struct_klass.new
  default_config
end

Instance Attribute Details

#opts_struct ⇒ Object (readonly)

Returns the value of attribute opts_struct.



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# File 'lib/dply/base_config.rb', line 82

def opts_struct
  @opts_struct
end

Class Method Details

.build(path = nil, &block) ⇒ Object 



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# File 'lib/dply/base_config.rb', line 73

def self.build(path = nil, &block)
  i = new
  i.read(path) if path
  i.instance_eval(&block) if block_given?
  i.opts_struct
end

.define_opt(opts) ⇒ Object 



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# File 'lib/dply/base_config.rb', line 15

def self.define_opt(opts)
  opts.define_singleton_method(:opt) do |name, type: Object|
    self[name] = type
  end
end

.define_opt_setter(opt) ⇒ Object 



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# File 'lib/dply/base_config.rb', line 63

def self.define_opt_setter(opt)
  define_method(opt) do |value = nil, &block|
    set opt, value, &block
  end
end

.define_opts(&block) ⇒ Object 



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# File 'lib/dply/base_config.rb', line 5

def self.define_opts(&block)
  opts = {}
  define_opt(opts)
  opts.instance_eval(&block)
  @struct_klass = new_struct_klass(opts)
  opts.each do |opt, _|
    define_opt_setter(opt)
  end
end

.new_struct_klass(opts) ⇒ Object 



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# File 'lib/dply/base_config.rb', line 21

def self.new_struct_klass(opts)
  Class.new do

    def initialize
      @proc_map = {}
    end

    def set_proc(opt, pr)
      @proc_map[opt] = pr
      ivar = "@#{opt}"
      remove_instance_variable(ivar) if instance_variable_defined?(ivar)
    end

    opts.each do |opt, type|

      define_method "#{opt}=" do |value|
        assert_type(opt, value, type)
        instance_variable_set("@#{opt}", value)
      end

      define_method opt do
        if instance_variable_defined?("@#{opt}")
          instance_variable_get("@#{opt}")
        elsif @proc_map.key?(opt)
          value = instance_eval(&@proc_map.fetch(opt))
          public_send("#{opt}=", value)
        else
          instance_variable_set("@#{opt}", nil)
        end
      end
    end

    opts = nil

    private def assert_type(opt, value, type)
      if not value.is_a?(type)
        raise Error, "opt(#{opt}) has value '#{value}' of type '#{value.class}' (Expected: '#{type}')"
      end
    end
  end
end

.struct_klass ⇒ Object 



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# File 'lib/dply/base_config.rb', line 69

def self.struct_klass
  @struct_klass
end

Instance Method Details

#default_config ⇒ Object 



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# File 'lib/dply/base_config.rb', line 89

def default_config
end

#read(path, optional: false) ⇒ Object 



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# File 'lib/dply/base_config.rb', line 100

def read(path, optional: false)
  if not File.readable?(path)
    return if optional
    raise Error, "config #{path} not readable"
  end
  instance_eval(File.read(path), path)
rescue NoMethodError => e
  raise Error, "invalid option used in config: #{e.name}"
end

#set(opt, value, &block) ⇒ Object 



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# File 'lib/dply/base_config.rb', line 92

def set(opt, value, &block)
  if block
    @opts_struct.set_proc(opt, block)
  else
    @opts_struct.public_send("#{opt}=", value)
  end
end