Class: Rubocop::Cop::Style::TrailingBlankLines

Inherits:
Cop
  • Object
show all
Defined in:
lib/rubocop/cop/style/trailing_blank_lines.rb

Overview

This cop looks for trailing blank lines in the source code.

Constant Summary collapse

MSG = 
'%d trailing blank lines detected.'

Constants inherited from Cop

Cop::OPERATOR_METHODS

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offences, #processed_source

Instance Method Summary collapse

Methods inherited from Cop

#add_offence, all, #autocorrect?, #convention, #cop_config, cop_name, #cop_name, cop_type, #debug?, #ignore_node, inherited, #initialize, lint?, #message, non_rails, rails?, style?, #support_autocorrect?, #warning

Constructor Details

This class inherits a constructor from Rubocop::Cop::Cop

Instance Method Details

#autocorrect(range) ⇒ Object 



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# File 'lib/rubocop/cop/style/trailing_blank_lines.rb', line 31

def autocorrect(range)
  # Bail out if there's also trailing whitespace, because
  # auto-correction in the two cops would result in clobbering.
  if range.source =~ / / &&
      config.for_cop('TrailingWhitespace')['Enabled']
    fail CorrectionNotPossible
  end

  @corrections << ->(corrector) { corrector.remove(range) }
end

#investigate(processed_source) ⇒ Object 



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# File 'lib/rubocop/cop/style/trailing_blank_lines.rb', line 10

def investigate(processed_source)
  blank_lines = 0

  processed_source.lines.reverse_each do |line|
    if line.blank?
      blank_lines += 1
    else
      break
    end
  end

  if blank_lines > 0
    range_size =
      processed_source.raw_lines.to_a[-blank_lines..-1].join.length
    range = source_range(processed_source.buffer,
                         processed_source[0...-blank_lines],
                         0, range_size)
    convention(range, range, format(MSG, blank_lines))
  end
end