Returns the Recipe with the given name, if it exists.

def get_recipe(cls, name, ctx):
        '''Returns the Recipe with the given name, if it exists.'''
        name = name.lower()
        if not hasattr(cls, "recipes"):
            cls.recipes = {}
        if name in cls.recipes:
            return cls.recipes[name]

        recipe_file = None
        for recipes_dir in cls.recipe_dirs(ctx):
            if not exists(recipes_dir):
                continue
            # Find matching folder (may differ in case):
            for subfolder in listdir(recipes_dir):
                if subfolder.lower() == name:
                    recipe_file = join(recipes_dir, subfolder, '__init__.py')
                    if exists(recipe_file):
                        name = subfolder  # adapt to actual spelling
                        break
                    recipe_file = None
            if recipe_file is not None:
                break

        if not recipe_file:
            raise ValueError('Recipe does not exist: {}'.format(name))

        mod = import_recipe('pythonforandroid.recipes.{}'.format(name), recipe_file)
        if len(logger.handlers) > 1:
            logger.removeHandler(logger.handlers[1])
        recipe = mod.recipe
        recipe.ctx = ctx
        cls.recipes[name.lower()] = recipe
        return recipe