module AwsEc2::Template::Helper::CoreHelper
Public Instance Methods
config()
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provides access to config/* settings as variables
AWS_EC2_ENV=development => config/development.yml AWS_EC2_ENV=production => config/production.yml
# File lib/aws_ec2/template/helper/core_helper.rb, line 63 def config AwsEc2.config end
layout_path(name="default")
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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
# 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()
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provides access to config/settings.yml as variables
# File lib/aws_ec2/template/helper/core_helper.rb, line 68 def settings AwsEc2.settings end
timestamp()
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pretty timestamp that is useful for ami ids. the timestamp is generated once and cached.
# 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")
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assuming user-data script is a bash script for simplicity for now
# 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
Private Instance Methods
add_setup_script(scripts, how)
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# File lib/aws_ec2/template/helper/core_helper.rb, line 94 def add_setup_script(scripts, how) return if @already_setup @already_setup = true requires_setup = @options[:cloudwatch] || @options[:auto_terminate] || @options[:ami_name] return unless requires_setup if how == :prepend scripts.unshift(script.extract_aws_ec2_scripts) else scripts << script.extract_aws_ec2_scripts end scripts end
append_scripts(scripts)
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# File lib/aws_ec2/template/helper/core_helper.rb, line 87 def append_scripts(scripts) add_setup_script(scripts, :append) scripts << script.auto_terminate if @options[:auto_terminate] scripts << script.create_ami if @options[:ami_name] scripts end
load_custom_helpers()
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Load custom helper methods from the project repo
# File lib/aws_ec2/template/helper/core_helper.rb, line 118 def load_custom_helpers Dir.glob("#{AwsEc2.root}/app/helpers/**/*_helper.rb").each do |path| filename = path.sub(%r{.*/},'').sub('.rb','') module_name = filename.classify require path self.class.send :include, module_name.constantize end end
prepend_scripts(scripts)
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TODO: move script combining logic into class
# File lib/aws_ec2/template/helper/core_helper.rb, line 80 def prepend_scripts(scripts) scripts.unshift(script.cloudwatch) if @options[:cloudwatch] scripts.unshift(script.auto_terminate_after_timeout) if @options[:auto_terminate] add_setup_script(scripts, :prepend) scripts end
script()
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# File lib/aws_ec2/template/helper/core_helper.rb, line 113 def script @script ||= AwsEc2::Script.new(@options) end