Class: Mutant::Diff

Inherits:
Object
  • Object
show all
Includes:
Adamantium::Flat
Defined in:
lib/mutant/diff.rb

Overview

Class to create diffs from source code

Constant Summary collapse

ADDITION = 
'+'.freeze
DELETION = 
'-'.freeze
NEWLINE = 
"\n".freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.build(old, new) ⇒ Diff

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return new object

Parameters:

  • old (String)
  • new (String)

Returns:



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# File 'lib/mutant/diff.rb', line 54

def self.build(old, new)
  new(lines(old), lines(new))
end

Instance Method Details

#colorized_diff ⇒ String?

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return colorized source diff

Returns:

  • (String) —

    if there is a diff

  • (nil) —

    otherwise



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# File 'lib/mutant/diff.rb', line 37

def colorized_diff
  return unless diff
  diff.lines.map do |line|
    self.class.colorize_line(line)
  end.join
end

#diff ⇒ String?

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return source diff

Returns:

  • (String) —

    if there is exactly one diff

  • (nil) —

    otherwise



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# File 'lib/mutant/diff.rb', line 20

def diff
  return unless diffs.length.equal?(1)
  ::Diff::LCS::Hunk.new(old, new, diffs.first, max_length, 0)
    .diff(:unified) << NEWLINE
end