Class: Aws::Cfn::Compiler::Main

Inherits:
Object
  • Object
show all
Defined in:
lib/aws/cfn/compiler.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Main

Returns a new instance of Main.



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# File 'lib/aws/cfn/compiler.rb', line 15

def initialize
  @items = {}
end

Instance Attribute Details

#items ⇒ Object

Returns the value of attribute items.



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# File 'lib/aws/cfn/compiler.rb', line 12

def items
  @items
end

#opts ⇒ Object

Returns the value of attribute opts.



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# File 'lib/aws/cfn/compiler.rb', line 13

def opts
  @opts
end

Instance Method Details

#load ⇒ Object 



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# File 'lib/aws/cfn/compiler.rb', line 82

def load
  %w{params mappings resources outputs}.each do |dir|
    load_dir(dir)
  end
end

#run ⇒ Object 



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# File 'lib/aws/cfn/compiler.rb', line 19

def run ()

  @opts = Slop.parse(help: true) do
    on :d, :directory=, 'The directory to look in', as: String
    on :o, :output=, 'The JSON file to output', as: String
  end

  unless @opts[:directory]
    puts @opts
    exit
  end

  load

  compiled = {
      AWSTemplateFormatVersion: "2010-09-09",
      Description:              "Description goes here",
      Parameters:               @items['params'],
      Mappings:                 @items['mappings'],
      Resources:                @items['resources'],
      Outputs:                  @items['outputs'],
  }

  output_file = @opts[:output] || "compiled.json"
  puts
  puts "Writing compiled file to #{output_file}..."
  save(compiled, output_file)

  puts
  puts "Validating compiled file..."

  validate(compiled)

  puts
  puts "*** Compiled Successfully ***"
end

#save(compiled, output_file) ⇒ Object 



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# File 'lib/aws/cfn/compiler.rb', line 70

def save(compiled, output_file)
  begin
    File.open output_file, 'w' do |f|
      f.write JSON.pretty_generate(compiled)
    end
    puts "  Compiled file written."
  rescue
    puts "!!! Could not write compiled file: #{$!}"
    abort!
  end
end

#validate(compiled) ⇒ Object 



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# File 'lib/aws/cfn/compiler.rb', line 56

def validate(compiled)
  names = compiled["Resources"].keys + compiled["Parameters"].keys
  refs = find_refs(compiled).select { |a| !(a =~ /^AWS::/) }

  unless (refs-names).empty?
    puts "!!! Unknown references !!!"
    (refs-names).each do |name|
      puts "  #{name}"
    end
    abort!
  end
  puts "  References validated"
end