Class: Lono::Cfn::Preview::Codediff

Inherits:
Base show all
Includes:
AwsServices, DiffViewer
Defined in:
lib/lono/cfn/preview/codediff.rb

Instance Method Summary collapse

Methods included from AwsServices

#cfn, #ec2, #iam, #s3, #s3_presigner, #s3_resource, #sts

Methods included from AwsServices::Helper

#rollback_complete?, #testing_update?

Methods included from AwsServices::StackSet

#find_stack_set, #stack_set_exists?

Methods included from AwsServices::Stack

#find_stack, #stack_exists?

Methods included from DiffViewer

#diff_viewer, #show_diff

Methods inherited from Base

#capabilities, #check_registration, #command_with_iam, #continue_update_rollback, #continue_update_rollback_sure?, #delete_rollback_stack, #exit_unless_updatable!, #generate_all, #pretty_path, #prompt_for_iam, #quit, #rerun_with_iam?, #set_template_url!, #show_options, #stack_status, #starting_message, #status, #tags

Methods included from Utils::Sure

#sure?

Methods inherited from AbstractBase

#initialize, #reinitialize, #template_path

Methods included from Blueprint::Root

#find_blueprint_root, #set_blueprint_root

Constructor Details

This class inherits a constructor from Lono::AbstractBase

Instance Method Details

#download_existing_cfn_template ⇒ Object 



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# File 'lib/lono/cfn/preview/codediff.rb', line 24

def download_existing_cfn_template
  resp = cfn.get_template(
    stack_name: @stack,
    template_stage: "Original"
  )
  IO.write(existing_template_path, resp.template_body)
end

#existing_template_path ⇒ Object 



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# File 'lib/lono/cfn/preview/codediff.rb', line 37

def existing_template_path
  "/tmp/existing_stack.yml"
end

#new_cfn_template ⇒ Object

for clarity



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# File 'lib/lono/cfn/preview/codediff.rb', line 33

def new_cfn_template
  template_path
end

#run ⇒ Object 



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# File 'lib/lono/cfn/preview/codediff.rb', line 6

def run
  puts "Code Diff Preview:".color(:green)

  unless stack_exists?(@stack)
    puts "WARN: Cannot create a diff for the stack because the #{@stack} does not exists.".color(:yellow)
    return
  end

  if @options[:noop]
    puts "NOOP Generating CloudFormation source code diff..."
  else
    generate_all # from Base superclass. Generates the output lono teplates
    puts "Generating CloudFormation source code diff..."
    download_existing_cfn_template
    show_diff(existing_template_path, new_cfn_template)
  end
end