Class: DakeExecutor

Inherits:
Object
  • Object
show all
Defined in:
lib/dake/executor.rb

Instance Method Summary collapse

Constructor Details

#initialize(analyzer, dake_db, dep_graph, jobs) ⇒ DakeExecutor

Returns a new instance of DakeExecutor.



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# File 'lib/dake/executor.rb', line 5

def initialize(analyzer, dake_db, dep_graph, jobs)
  @analyzer = analyzer
  @dake_db = dake_db
  @dep_graph = dep_graph
  @complete_dep_steps = Hash.new(0)
  @async = (jobs ? true : false)
  @pool = Concurrent::ThreadPoolExecutor.new(
      min_threads: 1,
      max_threads: jobs,
      max_queue: 0 # unbounded work queue
  ) if @async
end

Instance Method Details

#execute(rebuild_set, dry_run = false, log = false) ⇒ Object 



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# File 'lib/dake/executor.rb', line 18

def execute(rebuild_set, dry_run=false, log=false)
  if rebuild_set.empty?
    STDERR.puts "Nothing to be done.".colorize(:green)
    return
  end
  if @async
    dep_map = Hash.new
    rebuild_set.each do |step|
      dep_set = @dep_graph.dep_step[step]
      next if dep_set.empty?
      dep_map[step] = dep_set & rebuild_set
    end

    queue = Queue.new
    error_queue = Queue.new
    error_steps = Set.new

    error_thr = Thread.new do
      while error = error_queue.deq
        if error.is_a? Exception
          STDERR.puts "#{error.class}: #{error.message}".colorize(:red)
          STDERR.puts "Continue to execute other Step(s)".colorize(:red)
          STDERR.puts "To Force Quitting: Press Ctrl + C".colorize(:red)
        end
      end
    end

    lock = Concurrent::ReadWriteLock.new
    @dep_graph.leaf_step.each { |step| queue << step if rebuild_set.include? step }

    while next_step = queue.deq
      @pool.post(next_step) do |step|
        lock.acquire_read_lock
        error_step = error_steps.include? step
        lock.release_read_lock
        if error_step
          line, column = @analyzer.step_line_and_column step
          msg = "Step(#{step.object_id}) defined in #{step.src_file} at #{line}:#{column} " +
                "skipped due to prerequisite step(s) error."
          error_queue << Exception.new(msg)
        else
          execute_step(step, dry_run, log)
        end
        lock.acquire_write_lock
        dep_map.delete step
        if dep_map.empty?
          queue.close
        else
          @dep_graph.succ_step[step].each do |succ|
            next unless dep_map[succ]
            dep_map[succ].delete step
            if dep_map[succ].empty?
              queue << succ
            elsif dep_map[succ].all? { |dep_step| error_steps.include? dep_step }
              error_steps << succ
              queue << succ
            end
          end
        end
        lock.release_write_lock
      rescue Exception => e
        error_queue << e
        lock.acquire_write_lock
        error_steps << step
        dep_map.delete step
        if dep_map.empty?
          queue.close
        else
          @dep_graph.succ_step[step].each do |succ|
            if dep_map[succ].all? { |dep_step| error_steps.include? dep_step }
              error_steps << succ
              queue << succ
            end
          end
        end
        lock.release_write_lock
      end
    end
    @pool.shutdown
    @pool.wait_for_termination
    queue.close
    error_queue.close
    error_thr.join
    raise "Failed to execute some step(s)" unless error_steps.empty?
  else
    @dep_graph.step_list.each do |step|
      execute_step(step, dry_run, log) if rebuild_set.include? step
    end
  end
end

#execute_step(step, dry_run, log) ⇒ Object 



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# File 'lib/dake/executor.rb', line 109

def execute_step(step, dry_run, log)
  prepare_step(step)
  protocol = step.option_dict['protocol']
  protocol ||= 'shell'

  line, column = @analyzer.step_line_and_column step
  proto = DakeProtocol::ProtocolDict[protocol].new(step, @analyzer, @dake_db, dry_run)
  STDERR.puts ("[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] Running #{protocol} step(#{step.object_id}) defined in " +
               "#{step.src_file} at #{line}:#{column}").colorize(:green)
  STDERR.puts "[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] step(#{step.object_id}) Script in #{proto.script_file}".colorize(:green) unless dry_run
  step.targets.each do |target|
    next if target.scheme.is_a? DakeScheme::Regex
    if target.scheme.is_a? DakeScheme::Tag
      STDERR.puts "[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] step(#{step.object_id}) Producing ".colorize(:green) +
                   "@#{target.scheme.path}".colorize(:light_blue)
    else
      STDERR.puts "[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] step(#{step.object_id}) Producing ".colorize(:green) +
                  "#{target.scheme.path}".colorize(:light_white)
    end
  end
  STDERR.puts "[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] step(#{step.object_id}) STDOUT in #{proto.script_stdout}".colorize(:green) if log and not dry_run
  STDERR.puts "[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] step(#{step.object_id}) STDERR in #{proto.script_stderr}".colorize(:green) if log and not dry_run

  if dry_run
    puts step.cmd_text
  else
    proto.execute_step(log)
  end

  STDERR.puts ("[#{Time.now.strftime('%Y-%m-%d %H:%M:%S')}] Complete #{protocol} step(#{step.object_id}) defined in " +
      "#{step.src_file} at #{line}:#{column}").colorize(:green)
end

#prepare_command(step, context = {}) ⇒ Object

command preparation is intentionally deferred to execution phase to accelerate the analysis phase of big workflow file



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# File 'lib/dake/executor.rb', line 168

def prepare_command(step, context={})
  mixin_method = (step.option_dict['method'] ? step.option_dict['method'] : nil)
  method_mode = (step.option_dict['method_mode'] ? step.option_dict['method_mode'] : 'prepend')
  if mixin_method
    meth = @analyzer.method_dict[mixin_method]
    unless meth
      line, column = @analyzer.option_line_and_column(step.options, 'method')
      raise "Method `#{mixin_method}' used in #{step.src_file} at #{line}:#{column} is not defined."
    end
    @analyzer.analyze_option(meth)
    unless step.option_dict['protocol'] == meth.option_dict['protocol']
      line, column = @analyzer.option_line_and_column(step.options, 'protocol')
      line, column = @analyzer.step_line_and_column(step) unless line
      meth_line, meth_column = meth.name.line_and_column
      raise "Method `#{mixin_method}' defined in #{meth.src_file} at #{meth_line}:#{meth_column} " +
            "uses protocol `#{meth.option_dict['protocol']}', which is incompatible with protocol " +
            "`#{step.option_dict['protocol']}' used in #{step.src_file} at #{line}:#{column}."
    end
    if method_mode == 'replace'
      return prepare_command(meth, step.context)
    else
      method_text = prepare_command(meth, step.context)
    end
  end
  cmd_text = ''
  cmd_text << method_text if mixin_method and method_mode == 'prepend'
  first_indent = step.commands[0].items[0].to_s unless step.commands.empty?
  step.commands.each do |command|
    indent = command.items[0]
    if not indent.to_s.start_with? first_indent
      line, column = indent.line_and_column
      raise "Incompatible indentation in #{step.src_file} at #{line}:#{column}."
    else
      indentation = indent.to_s[first_indent.length..-1]
      cmd_text << indentation + @analyzer.text_eval(command, step.src_file, step.context.merge(context), 1) + "\n"
    end
  end
  cmd_text << method_text if mixin_method and method_mode == 'append'
  if cmd_text == ''
    line, column = @analyzer.step_line_and_column step
    step_meth = step.is_a?(StepMethod) ? 'Method' : 'Step'
    raise "#{step_meth} defined in #{step.src_file} at #{line}:#{column} has no commands."
  end
  cmd_text
end

#prepare_step(step) ⇒ Object 



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# File 'lib/dake/executor.rb', line 142

def prepare_step(step)
  context = step.context.merge!({'OUTPUTN' => 0, 'OUTPUTS' => [], 'INPUTN' => 0, 'INPUTS' => []})
  step.targets.reject { |f| [DakeScheme::Tag, DakeScheme::Regex].include? f.scheme.class }.each_with_index do |output, n|
    name = output.scheme.path
    context["OUTPUT"] = name if n == 0
    context["OUTPUT#{n}"] = name
    context["OUTPUTS"] << name
    context["OUTPUTN"] += 1
  end
  context['OUTPUTN'] = context['OUTPUTN'].to_s
  context['OUTPUTS'] = context['OUTPUTS'].join(" ")
  step.prerequisites.reject { |s| s.tag }.each_with_index do |input, n|
    name = input.scheme.path
    context["INPUT"] = name if n == 0
    context["INPUT#{n}"] = name
    context["INPUTS"] << name
    context["INPUTN"] += 1
  end
  context['INPUTN'] = context['INPUTN'].to_s
  context['INPUTS'] = context['INPUTS'].join(" ")
  @analyzer.analyze_option(step)
  step.cmd_text = prepare_command(step)
end