Class: LoggerPipe::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/logger_pipe/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(logger, cmd, options = {}) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/logger_pipe/runner.rb', line 19

def initialize(logger, cmd, options = {})
  @logger, @cmd = logger, cmd
  @timeout = options[:timeout]
  @dry_run = options[:dry_run]
end

Instance Attribute Details

#cmd ⇒ Object

Returns the value of attribute cmd.



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# File 'lib/logger_pipe/runner.rb', line 17

def cmd
  @cmd
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/logger_pipe/runner.rb', line 17

def logger
  @logger
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/logger_pipe/runner.rb', line 17

def timeout
  @timeout
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/logger_pipe/runner.rb', line 25

def execute
  if @dry_run
    logger.info("dry run: #{cmd}")
    return nil
  end
  logger.info("executing: #{cmd}")
  buf = []
  # systemをタイムアウトさせることはできないので、popenの戻り値を使っています。
  # see http://docs.ruby-lang.org/ja/2.0.0/class/Timeout.html
  com, pid = nil, nil
  begin
    Timeout.timeout( @timeout ) do

      # popenにブロックを渡さないと$?がnilになってしまうので敢えてブロックで処理しています。
      com = IO.popen(cmd) do |com|
        pid = com.pid
        while line = com.gets
          buf << line
          logger.info(line.chomp)
        end
      end
      if $?.exitstatus == 0
        logger.info("\e[32mSUCCESS: %s\e[0m" % [cmd])
        return buf.join
      else
        msg = "\e[31mFAILURE: %s\e[0m" % [cmd]
        logger.error(msg)
        raise Failure.new(msg, buf)
      end

    end
  rescue Timeout::Error => e
    logger.error("[#{e.class.name} #{e.message}] now killing process #{pid}: #{cmd}")
    begin
      Process.kill('SIGINT', pid) if pid
    rescue Exception => err
      logger.error("[#{err.class.name}] #{err.message}")
    end
    begin
      Timeout.timeout(10) do
        result = com.read
      end
    rescue Exception => err
      logger.error("failure to get result [#{err.class.name}] #{err.message}")
      result = "<failure to get result>"
    end
    begin
      msg = "\e[31mEXECUTION Timeout: %s\e[0m\n%s\n[result]: %s" % [cmd, buf.join.strip, result]
      logger.error(msg)
    rescue Exception => err
      logger.error("[#{err.class.name}] #{err.message}")
    end
    raise e
  end
end