Class: Zeus::LoadTracking

Inherits:
Object
  • Object
show all
Defined in:
lib/zeus/load_tracking.rb

Class Method Summary collapse

Class Method Details

.add_feature(file) ⇒ Object 



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# File 'lib/zeus/load_tracking.rb', line 4

def add_feature(file)
  full_path = File.expand_path(file)
  return unless File.exist?(full_path) && @feature_pipe
  notify_features([full_path])
end

.clear_feature_pipe ⇒ Object

Internal: This should only be called by Zeus code



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# File 'lib/zeus/load_tracking.rb', line 47

def clear_feature_pipe
  @feature_pipe.close
  @feature_pipe = nil
  @feature_mutex = nil
end

.set_feature_pipe(feature_pipe) ⇒ Object

Internal: This should only be called by Zeus code



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# File 'lib/zeus/load_tracking.rb', line 41

def set_feature_pipe(feature_pipe)
  @feature_mutex = Mutex.new
  @feature_pipe = feature_pipe
end

.track_features_loaded_by ⇒ Object

Internal: This should only be called by Zeus code



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# File 'lib/zeus/load_tracking.rb', line 11

def track_features_loaded_by
  old_features = $LOADED_FEATURES.dup

  # Catch exceptions so we can determine the features
  # that were being loaded at the time of the exception.
  err_features = []
  begin
    yield
  rescue SyntaxError => err
    # SyntaxErrors are a bit weird in that the file containing
    # the error is not in the backtrace, only the error message.
    match = /\A([^:]+):\d+: syntax error/.match(err.message)
    err_features << match[1] if match
    raise
  rescue ScriptError => err
    raise
  rescue => err
    raise
  ensure
    if err && err.backtrace
      err_features += err.backtrace.map { |b| b.split(':').first }
                     .select { |f| f.start_with?('/') }
                     .take_while { |f| f != __FILE__ }
    end

    notify_features(Set.new($LOADED_FEATURES) + err_features - old_features)
  end
end