Method: Exedb#update

Defined in:
lib/exedb.rb

#update ⇒ Object

Force command execution. If another instance with the same command is in progress, no new execution will be started



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# File 'lib/exedb.rb', line 66

def update
  @content=''

  # create file if needed
  unless File.file?(@path)
    File.open(@path,File::RDWR|File::CREAT,0644){|f|}
  end

  File.open(@path, "r+:UTF-8") { |file|
    if file.flock(File::LOCK_EX|File::LOCK_NB)
      begin
        IO.popen(@update_method){|pipe|
          line=pipe.gets
          while line
            line=@transform.call(line) if @transform
            if line
              file.puts line
              file.flush
              @content = @content+line
            end
            line=pipe.gets
          end
        }
        @code=$?.exitstatus
      rescue
        @content=''
        @code=-1
      end
      if @alltransform
        @content=@alltransform.call(@content,@code)
        file.seek(0,IO::SEEK_SET)
        file.write @content
        file.truncate(@content.size)
        file.flush
      end
      File.open("#{@path}.code",File::RDWR|File::CREAT, 0644){|code_file|
        code_file.puts @code
      }
      file.flock(File::LOCK_UN)
    else
      read_cache
    end
    @update_time=Time.now
  }
  #!!!warn "UPDATED!'"
  @content
end