Class: Transpec::DynamicAnalyzer

Inherits:
Object
  • Object
show all
Defined in:
lib/transpec/dynamic_analyzer.rb,
lib/transpec/dynamic_analyzer/rewriter.rb,
lib/transpec/dynamic_analyzer/runtime_data.rb

Defined Under Namespace

Classes: Rewriter, RuntimeData

Constant Summary collapse

ANALYSIS_METHOD = 
'transpec_analysis'
HELPER_FILE = 
'transpec_analysis_helper.rb'
RESULT_FILE = 
'transpec_analysis_result.json'
HELPER_SOURCE = 
<<-END
  require 'pathname'

  module TranspecAnalysis
    @base_path = Dir.pwd

    def self.data
      @data ||= {}
    end

    def self.node_id(filename, begin_pos, end_pos)
      absolute_path = File.expand_path(filename)
      relative_path = Pathname.new(absolute_path).relative_path_from(base_pathname).to_s
      [relative_path, begin_pos, end_pos].join('_')
    end

    def self.base_pathname
      @base_pathname ||= Pathname.new(@base_path)
    end

    at_exit do
      # Use JSON rather than Marshal so that:
      # * Unknown third-party class information won't be serialized.
      #   (Such objects are stored as a string.)
      # * Singleton method information won't be serialized.
      #   (With Marshal.load, `singleton can't be dumped (TypeError)` will be raised.)
      require 'json'
      path = File.join(@base_path, '#{RESULT_FILE}')
      File.open(path, 'w') do |file|
        JSON.dump(data, file)
      end
    end
  end

  def #{ANALYSIS_METHOD}(object, context, analysis_codes, filename, begin_pos, end_pos)
    pair_array = analysis_codes.map do |key, (target_type, code)|
      target = case target_type
               when :object  then object
               when :context then context
               end

      eval_data = {}

      begin
        eval_data[:result] = target.instance_eval(code)
      rescue Exception => error
        eval_data[:error] = error
      end

      [key, eval_data]
    end

    object_data = Hash[pair_array]

    id = TranspecAnalysis.node_id(filename, begin_pos, end_pos)
    TranspecAnalysis.data[id] = object_data

    object
  end
END

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ DynamicAnalyzer

Returns a new instance of DynamicAnalyzer.



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# File 'lib/transpec/dynamic_analyzer.rb', line 83

def initialize(options = {})
  @project = options[:project] || Project.new
  @rspec_command = options[:rspec_command] || default_rspec_command
  @silent = options[:silent] || false

  if block_given?
    in_copied_project do
      yield self
    end
  end
end

Instance Attribute Details

#project ⇒ Object (readonly)

Returns the value of attribute project.



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# File 'lib/transpec/dynamic_analyzer.rb', line 80

def project
  @project
end

#rspec_command ⇒ Object (readonly)

Returns the value of attribute rspec_command.



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# File 'lib/transpec/dynamic_analyzer.rb', line 80

def rspec_command
  @rspec_command
end

#silent ⇒ Object (readonly) Also known as: silent?

Returns the value of attribute silent.



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# File 'lib/transpec/dynamic_analyzer.rb', line 80

def silent
  @silent
end

Instance Method Details

#analyze(paths = []) ⇒ Object 



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# File 'lib/transpec/dynamic_analyzer.rb', line 103

def analyze(paths = [])
  in_copied_project do
    rewriter = Rewriter.new

    FileFinder.find(paths).each do |file_path|
      begin
        rewriter.rewrite_file!(file_path)
      rescue Parser::SyntaxError # rubocop:disable HandleExceptions
        # Syntax errors will be reported in CLI with Converter.
      end
    end

    File.write(HELPER_FILE, HELPER_SOURCE)

    run_rspec(paths)

    File.open(RESULT_FILE) do |file|
      RuntimeData.load(file)
    end
  end
end

#copy_recursively(source_root, destination_root) ⇒ Object 



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# File 'lib/transpec/dynamic_analyzer.rb', line 155

def copy_recursively(source_root, destination_root)
  source_root = File.expand_path(source_root)
  source_root_pathname = Pathname.new(source_root)

  destination_root = File.expand_path(destination_root)
  if File.directory?(destination_root)
    destination_root = File.join(destination_root, File.basename(source_root))
  end

  Find.find(source_root) do |source_path|
    relative_path = Pathname.new(source_path).relative_path_from(source_root_pathname).to_s
    destination_path = File.join(destination_root, relative_path)
    copy(source_path, destination_path)
  end
end

#default_rspec_command ⇒ Object 



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# File 'lib/transpec/dynamic_analyzer.rb', line 95

def default_rspec_command
  if @project.require_bundler?
    'bundle exec rspec'
  else
    'rspec'
  end
end

#in_copied_project ⇒ Object 



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# File 'lib/transpec/dynamic_analyzer.rb', line 125

def in_copied_project
  return yield if @in_copied_project

  @in_copied_project = true

  Dir.mktmpdir do |tmpdir|
    copy_recursively(@project.path, tmpdir)
    @copied_project_path = File.join(tmpdir, @project.basename)
    Dir.chdir(@copied_project_path) do
      yield
    end
  end
ensure
  @in_copied_project = false
end

#run_rspec(paths) ⇒ Object 



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# File 'lib/transpec/dynamic_analyzer.rb', line 141

def run_rspec(paths)
  @project.with_bundler_clean_env do
    ENV['SPEC_OPTS'] = ['-r', "./#{HELPER_FILE}"].shelljoin

    command = "#{rspec_command} #{paths.shelljoin}"

    if silent?
      `#{command} 2> /dev/null`
    else
      system(command)
    end
  end
end