compass/lib/vendor/fssm/path.rb

92 lines
1.9 KiB
Ruby

class FSSM::Path
def initialize(path=nil, glob=nil, &block)
set_path(path || '.')
set_glob(glob || '**/*')
init_callbacks
if block_given?
if block.arity == 1
block.call(self)
else
self.instance_eval(&block)
end
end
end
def to_s
@path.to_s
end
def to_pathname
@path
end
def glob(value=nil)
return @glob if value.nil?
set_glob(value)
end
def create(callback_or_path=nil, &block)
callback_action(:create, (block_given? ? block : callback_or_path))
end
def update(callback_or_path=nil, &block)
callback_action(:update, (block_given? ? block : callback_or_path))
end
def delete(callback_or_path=nil, &block)
callback_action(:delete, (block_given? ? block : callback_or_path))
end
private
def init_callbacks
do_nothing = lambda {|base, relative|}
@callbacks = Hash.new(do_nothing)
end
def callback_action(type, arg=nil)
if arg.is_a?(Proc)
set_callback(type, arg)
elsif arg.nil?
get_callback(type)
else
run_callback(type, arg)
end
end
def set_callback(type, arg)
raise ArgumentError, "Proc expected" unless arg.is_a?(Proc)
@callbacks[type] = arg
end
def get_callback(type)
@callbacks[type]
end
def run_callback(type, arg)
base, relative = split_path(arg)
begin
@callbacks[type].call(base, relative)
rescue Exception => e
raise FSSM::CallbackError, "#{type} - #{base.join(relative)}: #{e.message}", e.backtrace
end
end
def split_path(path)
path = FSSM::Pathname.for(path)
[@path, (path.relative? ? path : path.relative_path_from(@path))]
end
def set_path(path)
path = FSSM::Pathname.for(path)
raise FSSM::FileNotFoundError, "#{path}" unless path.exist?
@path = path.expand_path
end
def set_glob(glob)
@glob = glob.is_a?(Array) ? glob : [glob]
end
end