Class: Knj::Compiler

Inherits:
Object show all
Defined in:
lib/knj/compiler.rb

Overview

This class can compile Ruby-files into Ruby-methods on a special class and then call these methods to run the code from the file. The theory is that this can be faster…

Defined Under Namespace

Classes: Container

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ Compiler

Returns a new instance of Compiler.



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# File 'lib/knj/compiler.rb', line 3

def initialize(args = {})
  @args = args
  @mutex = Mutex.new
  
  if @args[:cache_hash]
    @compiled = @args[:cache_hash]
  else
    @compiled = {}
  end
end

Instance Method Details

#compile_file(args) ⇒ Object

Compiles file into cache as a method.



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# File 'lib/knj/compiler.rb', line 15

def compile_file(args)
  raise "File does not exist." if !File.exist?(args[:filepath])
  defname = def_name_for_file_path(args[:filepath])
  
  evalcont = "class Knj::Compiler::Container; def self.#{defname};"
  evalcont << File.read(args[:filepath])
  evalcont << ";end;end"
  
  eval(evalcont, nil, args[:fileident])
  @compiled[args[:filepath]] = Time.new
end

#def_name_for_file_path(filepath) ⇒ Object

Returns the method name for a filepath.



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# File 'lib/knj/compiler.rb', line 28

def def_name_for_file_path(filepath)
  return filepath.gsub("/", "_").gsub(".", "_")
end

#eval_file(args) ⇒ Object

Compile and evaluate a file - it will be cached.



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# File 'lib/knj/compiler.rb', line 33

def eval_file(args)
  #Compile if it hasnt been compiled yet.
  if !@compiled.key?(args[:filepath])
    @mutex.synchronize do
      compile_file(args) if !@compiled.key?(args[:filepath])
    end
  end
  
  #Compile if modified time has been changed.
  mtime = File.mtime(args[:filepath])
  if @compiled[args[:filepath]] < mtime
    @mutex.synchronize do
      compile_file(args)
    end
  end
  
  #Call the compiled function.
  defname = def_name_for_file_path(args[:filepath])
  Knj::Compiler::Container.send(defname)
end