109 lines
1.9 KiB
Ruby
109 lines
1.9 KiB
Ruby
module Mutant
|
|
# Class to create diffs from source code
|
|
class Differ
|
|
include Adamantium::Flat, Concord.new(:old, :new)
|
|
|
|
# Return source diff
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def diff
|
|
output = ''
|
|
case diffs.length
|
|
when 0
|
|
nil
|
|
when 1
|
|
output = Diff::LCS::Hunk.new(old, new, diffs.first, max_length, 0).diff(:unified)
|
|
output << "\n"
|
|
else
|
|
raise 'Mutation resulted in more than one diff, should not happen!'
|
|
end
|
|
end
|
|
memoize :diff
|
|
|
|
# Return colorized source diff
|
|
#
|
|
# @return [String]
|
|
#
|
|
# @api private
|
|
#
|
|
def colorized_diff
|
|
diff.lines.map do |line|
|
|
self.class.colorize_line(line)
|
|
end.join
|
|
end
|
|
memoize :colorized_diff
|
|
|
|
# Return new object
|
|
#
|
|
# @param [String] old
|
|
# @param [String] new
|
|
#
|
|
# @return [Differ]
|
|
#
|
|
# @api private
|
|
#
|
|
def self.build(old, new)
|
|
new(lines(old), lines(new))
|
|
end
|
|
|
|
# Break up source into lines
|
|
#
|
|
# @param [String] source
|
|
#
|
|
# @return [Array<String>]
|
|
#
|
|
# @api private
|
|
#
|
|
def self.lines(source)
|
|
source.lines.map { |line| line.chomp }
|
|
end
|
|
private_class_method :lines
|
|
|
|
private
|
|
|
|
# Return diffs
|
|
#
|
|
# @return [Array<Array>]
|
|
#
|
|
# @api private
|
|
#
|
|
def diffs
|
|
Diff::LCS.diff(old, new)
|
|
end
|
|
memoize :diffs
|
|
|
|
# Return max length
|
|
#
|
|
# @return [Fixnum]
|
|
#
|
|
# @api private
|
|
#
|
|
def max_length
|
|
old.length > new.length ? old.length : new.length
|
|
end
|
|
|
|
# Return colorized diff line
|
|
#
|
|
# @param [String] line
|
|
#
|
|
# @return [String]
|
|
# returns colorized line
|
|
#
|
|
# @api private
|
|
#
|
|
def self.colorize_line(line)
|
|
case line[0]
|
|
when '+'
|
|
Color::GREEN
|
|
when '-'
|
|
Color::RED
|
|
else
|
|
Color::NONE
|
|
end.format(line)
|
|
end
|
|
|
|
end # Differ
|
|
end # Mutant
|