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 20

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 18

def cmd
  @cmd
end

#logger ⇒ Object

Returns the value of attribute logger.



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# File 'lib/logger_pipe/runner.rb', line 18

def logger
  @logger
end

#timeout(&block) ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/logger_pipe/runner.rb', line 18

def timeout
  @timeout
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/logger_pipe/runner.rb', line 26

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
  stderr_buffer do |stderr_fp|
    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} 2> #{stderr_fp.path}") do |com|
        @com = com
        @pid = com.pid
        while line = com.gets
          @buf << line
          logger.debug(line.chomp)
        end
      end
      if $?.exitstatus == 0
        logging_stderr(stderr_fp)
        logger.info("\e[32mSUCCESS: %s\e[0m" % [cmd])
        return @buf.join
      else
        logging_stderr(stderr_fp)
        msg = "\e[31mFAILURE: %s\e[0m" % [cmd]
        logger.error(msg)
        raise Failure.new(msg, @buf)
      end

    end
  end
end

#logging_stderr(f) ⇒ Object 



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# File 'lib/logger_pipe/runner.rb', line 98

def logging_stderr(f)
  f.open
  c = f.read
  if !c.nil? && !c.empty?
    logger.info("--- begin stderr ---\n#{c}\n--- end stderr ---")
  end
end

#stderr_buffer ⇒ Object 



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# File 'lib/logger_pipe/runner.rb', line 91

def stderr_buffer
  Tempfile.open("logger_pipe.stderr.log") do |f|
    f.close
    return block_given? ? yield(f) : nil
  end
end