Class: Multidiff::Differ

Inherits:
Object
  • Object
show all
Defined in:
lib/multidiff/differ.rb

Constant Summary collapse

OVERRIDE_ACTION = 
Hash.new { |hash, key| hash[key] = key }.merge('!' => '*', '=' => ' ')

Class Method Summary collapse

Class Method Details

.diff(files) ⇒ Object 



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# File 'lib/multidiff/differ.rb', line 7

def self.diff(files)
  base = files.shift

  files.map { |file| Diff::LCS.sdiff(base, file) }
end

.pretty_diff(files) ⇒ Object 



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# File 'lib/multidiff/differ.rb', line 13

def self.pretty_diff(files)
  diff(files).map do |changes|
    changes.each_with_index.map do |change, line|
      text = if change.action == '!'
               "#{change.old_element}|#{change.new_element}"
             else
               change.old_element || change.new_element
             end

      "#{line.next}\t#{OVERRIDE_ACTION[change.action]}\t#{text}"
    end
  end
end