Class: LonoCfn::Diff

Inherits:
Base
  • Object
show all
Includes:
AwsServices
Defined in:
lib/lono-cfn/diff.rb

Instance Method Summary collapse

Methods included from AwsServices

#cfn, #stack_exists?, #testing_update?

Methods inherited from Base

#check_files, #check_for_errors, #convention_path, #detect_format, #exist_unless_updatable, #generate_all, #generate_params, #generate_templates, #get_source_path, #initialize, #quit, #stack_status

Methods included from Util

#are_you_sure?

Constructor Details

This class inherits a constructor from LonoCfn::Base

Instance Method Details

#diff_viewer ⇒ Object 



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# File 'lib/lono-cfn/diff.rb', line 36

def diff_viewer
  return ENV['LONO_CFN_DIFF'] if ENV['LONO_CFN_DIFF']
  system("type colordiff > /dev/null") ? "colordiff" : "diff"
end

#download_existing_cfn_template ⇒ Object 



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# File 'lib/lono-cfn/diff.rb', line 16

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

#existing_template_path ⇒ Object 



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# File 'lib/lono-cfn/diff.rb', line 41

def existing_template_path
  "/tmp/existing_cfn_template.json"
end

#new_cfn_template ⇒ Object

for clarity



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# File 'lib/lono-cfn/diff.rb', line 32

def new_cfn_template
  @template_path
end

#run ⇒ Object 



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# File 'lib/lono-cfn/diff.rb', line 5

def run
  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_changes
  end
end

#show_changes ⇒ Object 



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# File 'lib/lono-cfn/diff.rb', line 25

def show_changes
  command = "#{diff_viewer} #{existing_template_path} #{new_cfn_template}"
  puts "Running: #{command}"
  system(command)
end