class Churn::ChurnHistory

responsible for storing the churn history to json, and for loading old churn history data from json.

Public Class Methods

load_revision_data(revision, data_directory) click to toggle source

given a previous project revision find and load the churn data from a json file

# File lib/churn/history.rb, line 14
def self.load_revision_data(revision, data_directory)
  #load revision data from scratch folder if it exists
  filename = "#{data_directory}/#{revision}.json"
  if File.exist?(filename)
    begin
      json_data = File.read(filename)
      data      = JSON.parse(json_data)
      changed_files   = data['churn']['changed_files']
      changed_classes = data['churn']['changed_classes']
      changed_methods = data['churn']['changed_methods']
    rescue JSON::ParserError
      #leave all of the objects nil
    end
  end
  [changed_files, changed_classes, changed_methods]
end
store_revision_history(revision, hash_data, data_directory) click to toggle source

takes current revision and its hash_data and stores it

# File lib/churn/history.rb, line 8
def self.store_revision_history(revision, hash_data, data_directory)
  FileUtils.mkdir_p data_directory
  File.open("#{data_directory}/#{revision}.json", 'w') {|file| file.write(hash_data.to_json) }
end