Module: Levels::Runtime

Included in:
Input::Ruby::DSL, LazyEvaluator::DSL
Defined in:
lib/levels/runtime.rb

Overview

Public: Methods in this module are available within any Ruby input. You may extend it with any additonal methods you require.

Constant Summary collapse

FileNotFoundError = 
Class.new(RuntimeError)

Instance Method Summary collapse

Instance Method Details

#file(file_path) ⇒ Object

Public: Read the value from a file on disk. The file will not be read until the key is accessed.

file_path - String path to the file. The path may be absolute,

or relative to the Ruby file calling this function.

Returns a Proc that reads the file when called. That proc raises Levels::Ruby::FileNotFoundError if the file does

not exist.



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# File 'lib/levels/runtime.rb', line 17

def file(file_path)
  return nil if file_path.nil?
  caller_path = Pathname.new(caller[0]).dirname
  -> do
    path = caller_path + file_path
    if path.exist?
      path.read
    else
      raise FileNotFoundError, path.to_s
    end
  end
end