Module: BashLike

Defined in:
lib/dorkbox.rb

Constant Summary collapse

ALWAYS_PRINT_STDOUT = 
false
ALWAYS_ECHO_CMDLINE = 
true
EXCEPTION_ON_NONZERO_STATUS = 
true
LOGFILE = 
nil
LOGFILE_MAX_LINES = 
5000

Instance Method Summary collapse

Instance Method Details

#`(cmdline) ⇒ Object 



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# File 'lib/dorkbox.rb', line 12

def `(cmdline)
  c(cmdline, true)
  return $exit == 0 ? true : false
end

#c(cmdline, print_each_line = ALWAYS_PRINT_STDOUT) ⇒ Object 



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# File 'lib/dorkbox.rb', line 17

def c(cmdline, print_each_line=ALWAYS_PRINT_STDOUT)
  $stdout.puts "+ #{cmdline}" if ALWAYS_ECHO_CMDLINE
  Open3.popen3(cmdline) { |stdin, stdout, stderr, wait_thr|
    all_out = ''
    all_err = ''
    while wait_thr.alive?
      if !(stderr.ready? || stdout.ready?)
        sleep(0.1)
        next
      end
      current_out = stdout.read(stdout.nread)
      current_err = stderr.read(stderr.nread)
      all_out = all_out + current_out
      all_err = all_err + current_err
      $stdout.puts current_out if (print_each_line && !current_out.empty?)
      $stderr.puts current_err if !current_err.empty?
    end
    status = wait_thr.value
    # do it once more to catch everything that was buffered
    current_out = stdout.read()
    current_err = stderr.read()
    all_out = all_out + current_out
    all_err = all_err + current_err
    $stdout.puts current_out if (print_each_line && !current_out.empty?)
    $stderr.puts current_err if !current_err.empty?
    $out = all_out
    $err = all_err
    $exit = status.exitstatus
    raise StandardError.new("ERROR: #{cmdline.split()[0]} -> exit status #{status.exitstatus}") if (status.exitstatus != 0 && EXCEPTION_ON_NONZERO_STATUS)
    all_out
  }
end

#log(message) ⇒ Object 



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# File 'lib/dorkbox.rb', line 50

def log(message)
  if $global_log.nil? and !LOGFILE.nil?
    # remove the exceeding lines
    if File.exists?(LOGFILE)
      f = File.open(LOGFILE, "r")
      lines = f.readlines()
      retain_from = [lines.size, LOGFILE_MAX_LINES].min
      retain_lines = lines[-retain_from..-1]
      f.close()
    else
      retain_lines=[]
    end
    $global_log = File.open(LOGFILE, "w")
    $global_log.write(retain_lines.join(''))
  end

  final_message = "[#{Time.now.to_s}] #{message}"
  $global_log.puts(final_message) unless $global_log.nil?
  $stdout.puts(final_message)
end