Module: AwsEc2::Template::Helper::CoreHelper

Defined in:
lib/aws_ec2/template/helper/core_helper.rb

Instance Method Summary collapse

Instance Method Details

#config ⇒ Object

provides access to config/* settings as variables

AWS_EC2_ENV=development => config/development.yml
AWS_EC2_ENV=production => config/production.yml



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# File 'lib/aws_ec2/template/helper/core_helper.rb', line 63

def config
  AwsEc2.config
end

#layout_path(name = "default") ⇒ Object

Get full path of layout from layout name

layout_name=false - dont use layout at all
layout_name=nil - default to default.sh layout if available



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# File 'lib/aws_ec2/template/helper/core_helper.rb', line 38

def layout_path(name="default")
  return false if name == false # disable layout
  name = "default" if name.nil? # in case user passes in nil

  ext = File.extname(name)
  name += ".sh" if ext.empty?
  layout_path = "#{AwsEc2.root}/app/user-data/layouts/#{name}"

  # special rule for default in case there's no default layout
  if name.include?("default") and !File.exist?(layout_path)
    return false
  end

  # other named layouts should error if it doesnt exit
  unless File.exist?(layout_path)
    puts "ERROR: Layout #{layout_path} does not exist. Are you sure it exists?  Exiting".colorize(:red)
    exit 1
  end

  layout_path
end

#settings ⇒ Object

provides access to config/settings.yml as variables



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# File 'lib/aws_ec2/template/helper/core_helper.rb', line 68

def settings
  AwsEc2.settings
end

#timestamp ⇒ Object

pretty timestamp that is useful for ami ids. the timestamp is generated once and cached.



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# File 'lib/aws_ec2/template/helper/core_helper.rb', line 74

def timestamp
  @timestamp ||= Time.now.strftime("%Y-%m-%d-%H-%M-%S")
end

#user_data(name, base64: true, layout: "default") ⇒ Object

assuming user-data script is a bash script for simplicity for now



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# File 'lib/aws_ec2/template/helper/core_helper.rb', line 6

def user_data(name, base64:true, layout:"default")
  # allow user to specify the path also
  if File.exist?(name)
    name = File.basename(name) # normalize name, change path to name
  end
  name = File.basename(name, '.sh')

  layout_path = layout_path(layout)
  path = "#{AwsEc2.root}/app/user-data/#{name}.sh"
  result = RenderMePretty.result(path, context: self, layout: layout_path)
  # Must prepend and append scripts in user_data here because we need to
  # encode the user_data script for valid yaml to load in the profile.
  # Tried moving this logic to the params but that is too late and produces
  # invalid yaml.  Unless we want to encode and dedode twice.
  scripts = [result]
  scripts = prepend_scripts(scripts)
  scripts = append_scripts(scripts)
  divider = "\n############################## DIVIDER ##############################\n"
  result = scripts.join(divider)

  # save the unencoded user-data script for easy debugging
  temp_path = "#{AwsEc2.root}/tmp/user-data.txt"
  FileUtils.mkdir_p(File.dirname(temp_path))
  IO.write(temp_path, result)

  base64 ? Base64.encode64(result).strip : result
end