Class: CfnDsl::ExternalParameters

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/cfndsl/external_parameters.rb

Overview

Handles all external parameters

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ExternalParameters

Returns a new instance of ExternalParameters.



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# File 'lib/cfndsl/external_parameters.rb', line 26

def initialize
  @parameters = self.class.defaults.clone
end

Instance Attribute Details

#parameters ⇒ Object (readonly)

Returns the value of attribute parameters.



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# File 'lib/cfndsl/external_parameters.rb', line 8

def parameters
  @parameters
end

Class Method Details

.current ⇒ Object 



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# File 'lib/cfndsl/external_parameters.rb', line 17

def current
  @current || refresh!
end

.defaults(params = {}) ⇒ Object 



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# File 'lib/cfndsl/external_parameters.rb', line 11

def defaults(params = {})
  @defaults ||= {}
  @defaults.merge! params
  @defaults
end

.refresh! ⇒ Object 



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# File 'lib/cfndsl/external_parameters.rb', line 21

def refresh!
  @current = new
end

Instance Method Details

#add_to_binding(bind, logstream) ⇒ Object 



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# File 'lib/cfndsl/external_parameters.rb', line 43

def add_to_binding(bind, logstream)
  parameters.each_pair do |key, val|
    logstream.puts("Setting local variable #{key} to #{val}") if logstream
    bind.eval "#{key} = #{val.inspect}"
  end
end

#get_param(k) ⇒ Object Also known as: [] 



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# File 'lib/cfndsl/external_parameters.rb', line 34

def get_param(k)
  parameters[k.to_sym]
end

#load_file(fname) ⇒ Object 



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# File 'lib/cfndsl/external_parameters.rb', line 50

def load_file(fname)
  format = File.extname fname
  case format
  when /ya?ml/
    params = YAML.load_file fname
  when /json/
    params = JSON.load File.read(fname)
  else
    raise "Unrecognized extension #{format}"
  end
  params.each { |key, val| set_param(key, val) }
end

#set_param(k, v) ⇒ Object 



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# File 'lib/cfndsl/external_parameters.rb', line 30

def set_param(k, v)
  parameters[k.to_sym] = v
end

#to_h ⇒ Object 



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# File 'lib/cfndsl/external_parameters.rb', line 39

def to_h
  parameters
end