Class: SimpleConf::Conf

Inherits:
BlankSlate
  • Object
show all
Defined in:
lib/simpleconf/conf.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(instance_block, opts = {}) ⇒ Conf

Returns a new instance of Conf.



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# File 'lib/simpleconf/conf.rb', line 5

def initialize(instance_block, opts={})
  @__opts__ = opts
  @__vars__ = {}
  @__init_only__ = false
  @__instance_block__ = instance_block
  @__default_config__ = {
    :override => true
  }

  @__overrides__ = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(meth, *args, &blk) ⇒ Object 



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# File 'lib/simpleconf/conf.rb', line 48

def method_missing(meth, *args, &blk)
    fail "#{meth} was not defined in configuration setup" if @__init_only__

    meta = (class << self; self; end)

    if block_given?
      nested_opts = @__opts__.merge(args.shift || {})
      sub_config = SimpleConf.build(nested_opts, &blk)

      meta.class_eval do
        define_method(meth) do |*args, &blk|
        @__vars__[meth]
        end
      end
      @__vars__[meth] = sub_config
      return
    end

    value = args.shift
    opts = @__default_config__.merge(args.shift || {})
    @__overrides__[meth] = opts[:override]
    meta.class_eval do
      define_method(meth) do |*args, &blk|
        local_override = ((args[1].is_a?(Hash) && !args[1][:override].nil?)   && @__overrides__[meth]) ? args[1][:override] : @__overrides__[meth]

        @__overrides__[meth] = local_override

        if args.first && @__overrides__[meth]
          @__vars__[meth] = args.first
        else
          @__vars__[meth]
        end
      end

      define_method("#{meth}=") do |*args|
        if args.first && @__overrides__[meth]
          @__vars__[meth] = args.first
        end
        @__vars__[meth]
      end
    end
    @__vars__[meth] = value
end

Instance Attribute Details

#__init_only__ ⇒ Object

Returns the value of attribute init_only.



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# File 'lib/simpleconf/conf.rb', line 3

def __init_only__
  @__init_only__
end

#__instance_block__ ⇒ Object (readonly)

Returns the value of attribute instance_block.



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# File 'lib/simpleconf/conf.rb', line 4

def __instance_block__
  @__instance_block__
end

#__overrides__ ⇒ Object (readonly)

Returns the value of attribute __overrides__.



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# File 'lib/simpleconf/conf.rb', line 4

def __overrides__
  @__overrides__
end

#__vars__ ⇒ Object

Returns the value of attribute __vars__.



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# File 'lib/simpleconf/conf.rb', line 3

def __vars__
  @__vars__
end

Instance Method Details

#check_and_change_overrides(other) ⇒ Object 



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# File 'lib/simpleconf/conf.rb', line 24

def check_and_change_overrides(other)
  self.__overrides__.each do |meth, override|
    if !override
      other.__overrides__[meth] = false
      other.__vars__[meth] = __vars__[meth]
    end
  end

end

#merge(other) ⇒ Object 



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# File 'lib/simpleconf/conf.rb', line 17

def merge(other)
  fail "Other needs to be a SimpleConf::Conf" unless other.is_a? Conf
  copy = SimpleConf.build(@__opts__, &@__instance_block__)
  copy.merge!(other)
  copy
end

#merge!(other) ⇒ Object 



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# File 'lib/simpleconf/conf.rb', line 34

def merge!(other)
  fail "Other needs to be a SimpleConf::Conf" unless other.is_a? Conf
  check_and_change_overrides(other)
  self.__init_only__ = other.__init_only__
  if other.__instance_block__.is_a?(Proc)
    self.instance_eval(&other.__instance_block__)
  else
    self.instance_eval(other.__instance_block__)
  end

  __vars__.rmerge!(other.__vars__)
  nil
end