Class: Hiera::Backend::Eyaml::Subcommands::Edit

Inherits:
Hiera::Backend::Eyaml::Subcommand show all
Defined in:
lib/hiera/backend/eyaml/subcommands/edit.rb

Class Method Summary collapse

Methods inherited from Hiera::Backend::Eyaml::Subcommand

all_options, attach_option, find, hidden?, load_config_file, parse, prettyname

Class Method Details

.description ⇒ Object 



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# File 'lib/hiera/backend/eyaml/subcommands/edit.rb', line 18

def self.description
  "edit an eyaml file"
end

.execute ⇒ Object 



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# File 'lib/hiera/backend/eyaml/subcommands/edit.rb', line 34

def self.execute
  encrypted_parser = Parser::ParserFactory.encrypted_parser
  tokens = encrypted_parser.parse Eyaml::Options[:input_data]
  decrypted_input = tokens.each_with_index.to_a.map{|(t,index)| t.to_decrypted :index => index}.join
  decrypted_file = Utils.write_tempfile decrypted_input

  editor = Utils.find_editor

  begin
    system "#{editor} #{decrypted_file}"
    status = $?

    raise StandardError, "File was moved by editor" unless File.file? decrypted_file
    edited_file = File.read decrypted_file

    raise StandardError, "Editor #{editor} has not exited?" unless status.exited?
    raise StandardError, "Editor did not exit successfully (exit code #{status.exitstatus}), aborting" unless status.exitstatus == 0
    raise StandardError, "Edited file is blank" if edited_file.empty?

    if edited_file == decrypted_input
      Utils.info "No changes detected, exiting"
    else
      decrypted_parser = Parser::ParserFactory.decrypted_parser
      edited_tokens = decrypted_parser.parse(edited_file)

      # check that the tokens haven't been copy / pasted
      used_ids = edited_tokens.find_all{ |t| t.class.name =~ /::EncToken$/ and !t.id.nil? }.map{ |t| t.id }
      if used_ids.length != used_ids.uniq.length
          raise RecoverableError, "A duplicate DEC(ID) was found so I don't know how to proceed. This is probably because you copy and pasted a value - if you do this please delete the ID in parentheses"
      end

      # replace untouched values with the source values
      edited_denoised_tokens = edited_tokens.map{ |token|
        if token.class.name =~ /::EncToken$/ && !token.id.nil?
          old_token = tokens[token.id]
          if old_token.plain_text.eql? token.plain_text
            old_token
          else
            token
          end
        else
          token
        end
      }

      encrypted_output = edited_denoised_tokens.map{ |t| t.to_encrypted }.join

      filename = Eyaml::Options[:eyaml]
      File.open("#{filename}", 'w') { |file|
        file.write encrypted_output
      }
    end
  rescue RecoverableError => e
    Utils.info e
    if agree "Return to the editor to try again?"
      retry
    else
      raise e
    end
  ensure
    Utils.secure_file_delete :file => decrypted_file, :num_bytes => [edited_file.length, decrypted_input.length].max
  end

  nil
end

.helptext ⇒ Object 



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# File 'lib/hiera/backend/eyaml/subcommands/edit.rb', line 22

def self.helptext
  "Usage: eyaml edit [options] <some-eyaml-file>"
end

.options ⇒ Object 



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# File 'lib/hiera/backend/eyaml/subcommands/edit.rb', line 14

def self.options
  []
end

.validate(options) ⇒ Object 



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# File 'lib/hiera/backend/eyaml/subcommands/edit.rb', line 26

def self.validate options
  Trollop::die "You must specify an eyaml file" if ARGV.empty?
  options[:source] = :eyaml
  options[:eyaml] = ARGV.shift
  options[:input_data] = File.read options[:eyaml]
  options
end