Class: AlsDelta

Inherits:
Object
  • Object
show all
Includes:
Run
Defined in:
lib/als_delta/als_delta_class.rb

Instance Method Summary collapse

Methods included from Run

#run, #run_capture_stdout

Constructor Details

#initialize(set_name, **options) ⇒ AlsDelta

Returns a new instance of AlsDelta.



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# File 'lib/als_delta/als_delta_class.rb', line 10

def initialize(set_name, **options)
  @options = options
  @loglevel  = "-loglevel #{@options[:loglevel]}"
  @loglevel += ' -stats' unless @options[:loglevel] == 'quiet'
  @set_name = set_name

  @set_dir = File.dirname set_name
  @set_name_only = File.basename set_name, '.als'
end

Instance Method Details

#backup_name ⇒ Object 



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# File 'lib/als_delta/als_delta_class.rb', line 20

def backup_name
  @backup_name = if @options[:keep]
                   timestamp = Time.now.getutc.strftime '%Y-%m-%d_%H:%M:%S'
                   "#{@set_dir}/#{@set_name_only}_#{timestamp}.als"
                 else
                   "#{@set_dir}/#{@set_name_only}_backup.als"
                 end
end

#backup_set ⇒ Object 



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# File 'lib/als_delta/als_delta_class.rb', line 29

def backup_set
  @backup_name = backup_name
  puts "Backing up Live set to '#{@backup_name}'"
  FileUtils.cp @set_name, @backup_name
end

#cleanup ⇒ Object 



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# File 'lib/als_delta/als_delta_class.rb', line 35

def cleanup
  return if @options[:keep] || !@backup_name
  return unless File.exist? @backup_name

  puts "Deleting '#{@backup_name}'"
  File.delete @backup_name
end

#show ⇒ Object 



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# File 'lib/als_delta/als_delta_class.rb', line 43

def show
  backup_set
  loop do
    puts 'Press any key to display the changes to the Live set XML file, or press Esc to exit.'
    character = $stdin.getch
    exit if character.ord == 27
    output = run_capture_stdout "GZIP=--no-name zdiff #{@set_name.shellescape} #{@backup_name.shellescape}"
    if output.empty?
      puts 'There were no changes to the saved live set.'
    else
      puts output.join("\n")
      backup_set
    end
  rescue StandardError => e
    puts e
  end
end