Method: CodeDiff#run

Defined in:
lib/codediff.rb

#run(old_file, new_file) ⇒ Object 



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# File 'lib/codediff.rb', line 19

def run old_file, new_file

@res["old_file_lines"] = File.foreach(old_file).count
@res["new_file_lines"] = File.foreach(new_file).count

cmd = "diff -y --left-column " +  new_file + " " + old_file
`#{cmd}`.each_line { |line| 
	line = line.chomp
	if !line.end_with?("(") 
		lines = line.split("|")
		if lines.size > 1
			@res["accumulated_distance"] += Levenshtein.normalized_distance lines[0].chomp, lines[1].chomp
		end

		lines = line.split("<")
		if lines.size > 1
				@res["accumulated_distance"] += Levenshtein.normalized_distance lines[0].chomp, lines[1].chomp
		end
		
		lines = line.split(">")
		if lines.size > 1
			@res["accumulated_distance"] += Levenshtein.normalized_distance lines[0].chomp, lines[1].chomp
		end
	end
}

# count of different strings
Diffy::Diff.new(new_file, old_file, :source => 'files').each { |item| 	
	# remove white spaces
	item = item.gsub(/\s+/, "")

	# ignore space lines 		
	next if item.size == 1

	# see if changed starts with comment
	case item[0]
	when "+"
		case item[1]
		when "#", "/", "*"
			@res["comment_additions"] += 1 
		else
			@res["additions"] += 1 
		end
	when "-" 
		case item[1]
		when "#"
			@res["comment_subtraction"] += 1
		else
			@res["subtractions"] += 1 
		end
	end
}


	diff = [@res["additions"], @res["subtractions"]].max
	average = (@res["old_file_lines"] + @res["new_file_lines"]) / 2.0
	@res["percent_change"] = diff / average * 100

	return @res

end