Class: Live

Inherits:
Object
  • Object
show all
Defined in:
lib/motion/project/live.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Live

Returns a new instance of Live.



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# File 'lib/motion/project/live.rb', line 32

def initialize
  @buffered_output = ''
end

Instance Method Details

#adieu(string) ⇒ Object 



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# File 'lib/motion/project/live.rb', line 156

def  adieu(string)
  puts
  puts string.yellow
  puts
end

#colorize_console_output(string) ⇒ Object 



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# File 'lib/motion/project/live.rb', line 142

def colorize_console_output(string)
  color = string.include?('Error') ? :yellow : :green
  string.gsub(/\n*(=> .*)/,"\n" + '\1'.send(color))
end

#console_attach ⇒ Object 



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# File 'lib/motion/project/live.rb', line 129

def console_attach
  Thread.new do
    loop do
      buffer = ''
      @stdout.readpartial(4096, buffer)
      @buffered_output << buffer
      print colorize_console_output(buffer)
      STDOUT.flush
    end
  end
  wait_console
end

#console_put(input) ⇒ Object 



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# File 'lib/motion/project/live.rb', line 110

def console_put(input)
  wait_console
  @stdin.puts input
  @buffered_output = ''
  wait_console
end

#console_self ⇒ Object

Interactions with the ruby motion REPL



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# File 'lib/motion/project/live.rb', line 105

def console_self
  wait_console
  @buffered_output[/\(.*\)>/] + ' '
end

#create_scratch_pad_if_needed ⇒ Object

Helpers



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# File 'lib/motion/project/live.rb', line 87

def create_scratch_pad_if_needed
  FileUtils.touch(scratchpad_file) unless File.exist?(scratchpad_file)
end

#dirs ⇒ Object 



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# File 'lib/motion/project/live.rb', line 99

def dirs
  Dir.pwd
end

#find_changed_lines ⇒ Object 



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# File 'lib/motion/project/live.rb', line 73

def find_changed_lines
  new = scratch_pad
  if @old_code && !new.include?('#nodiff')
    delta = new.split("\n") - @old_code.split("\n")
  else
    delta = new.split("\n")
  end
  @old_code = new
  # reject comments
  delta.reject{ |l| l =~ /^\s*$/ || l =~ /^\s*#/ }
end

#run ⇒ Object 



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# File 'lib/motion/project/live.rb', line 36

def run
  create_scratch_pad_if_needed
  # TODO: running rake inside rake is very lame,
  # need to do something about it.
  PTY.spawn("rake", 'simulator') do |stdout, stdin, pid|
    @stdout, @stdin = stdout, stdin
    console_attach
    welcome "Welcome to liveconding"
    print console_self
    start_watching
  end
rescue PTY::ChildExited
  adieu "[LIVE] Terminating as the simulator quitted"
# TODO: need to trap interrupt to exit gracefully.
# rescue Interrupt
#   adieu "Bye Bye"
end

#scratch_pad ⇒ Object 



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# File 'lib/motion/project/live.rb', line 91

def scratch_pad
  File.read(scratchpad_file)
end

#scratchpad_file ⇒ Object 



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# File 'lib/motion/project/live.rb', line 95

def scratchpad_file
  'LiveScratchpad.rb'
end

#send_changes ⇒ Object 



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# File 'lib/motion/project/live.rb', line 62

def send_changes
  code = find_changed_lines
  return if code.empty?
  puts "\n\n#{code.join("\n")}\n".magenta
  print console_self
  code.each { |l| console_put l }
  wait_console_result
  puts "\n\n Changes processed \n\n".reversed
  print console_self
end

#start_watching ⇒ Object 



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# File 'lib/motion/project/live.rb', line 54

def start_watching
  fsevent = FSEvent.new
  fsevent.watch Dir.pwd do |dirs|
    send_changes
  end
  fsevent.run
end

#wait_console ⇒ Object 



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# File 'lib/motion/project/live.rb', line 117

def wait_console
  until @buffered_output =~ /\(.*\)[>,?]/
    # Wait
  end
end

#wait_console_result ⇒ Object 



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# File 'lib/motion/project/live.rb', line 123

def wait_console_result
  until @buffered_output =~ /=> .*/
    # Wait
  end
end

#welcome(string) ⇒ Object

Custom output



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# File 'lib/motion/project/live.rb', line 149

def welcome(string)
  puts
  puts
  puts "-> #{string}".green
  puts
end