Class: Ella::Pipeline

Inherits:
Object
  • Object
show all
Defined in:
lib/ella/pipeline.rb

Overview

Custom made super-simple assets pipeline. This KISS philosophy of this pipeline is:

“data from files” –> “user defined filter in Ruby” –> “output file”

Of course, Ella is modular, so the user should be able to disable it and set up their own assets pipeline of choice.

Instance Method Summary collapse

Constructor Details

#initialize(pipeline_type) ⇒ Pipeline

Returns a new instance of Pipeline.



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# File 'lib/ella/pipeline.rb', line 27

def initialize(pipeline_type)
  @type = pipeline_type

  Log.info("Initializing #{@type.upcase} pipeline...")
  set_io_directories
  initialize_tempfile
  load File.join(Dir.pwd, "configs/#{@type}.rb")
end

Instance Method Details

#listen ⇒ Object

Because this is user-defined code, any exception is possible. Having to restart the development server every time there is some error in the filter is *NOT DESIRABLE*.



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# File 'lib/ella/pipeline.rb', line 39

def listen
  run # Public files are not persistent, so this must be run on startup.
  @listener = Listen.to(@input_dir) do |modified, added, removed|
    report_listen_results(modified, added, removed)
    run
  rescue => e
    report_listen_error(e)
  end
  @listener.start
end

#run ⇒ Object 



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# File 'lib/ella/pipeline.rb', line 50

def run
  @tempfile.close
  @tempfile.unlink
  @tempfile = Tempfile.new(['', ".#{@type}"], @output_dir)
  @tempfile.write(filter)
  @tempfile.rewind
end