Class: CommandUtils::LineBuffer

Inherits:
Object
  • Object
show all
Defined in:
lib/command_utils/line_buffer.rb

Overview

Line buffers writes, and calls method at each line

Instance Method Summary collapse

Constructor Details

#initialize(method, prefix = '') ⇒ LineBuffer

Receive a method to call passing each line received. Optionally, specify a prefix.



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# File 'lib/command_utils/line_buffer.rb', line 6

def initialize method, prefix=''
  @method = method
  @prefix = prefix
  @buffer = nil
end

Instance Method Details

#flush ⇒ Object

Send all buffer to method



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# File 'lib/command_utils/line_buffer.rb', line 29

def flush
  return unless @buffer
  @method.call(@prefix + @buffer)
  @buffer = nil
end

#write(str) ⇒ Object

Receive a new chunk, and if a line is formed, call method.



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# File 'lib/command_utils/line_buffer.rb', line 13

def write str
  @buffer ||= ''
  @buffer += str
  return unless @buffer.include? "\n"
  lines = @buffer.split("\n")
  @buffer = if @buffer.match("\n$")
    nil
  else
    lines.pop
  end
  lines.each do |line|
    @method.call(@prefix + line)
  end
end