Support excluded paths.

[darkstarx]

Hi! Thanks for the great package.

I've noticed that if watchDependencies is true, there is the path ./ in the watch list. I'd prefer to exclude this path from the watch list but there is no such a way. Using onBeforeReload is not a good solution in this case, since due to debouncing there may be a batch of events, and some of them should cause hot reloading, but if at least one event is discarded by the onBeforeReload, all other events will be discarded:

      var noVeto = true;
      if (_onBeforeReload != null) {
        if (changes?.isEmpty ?? true) {
          noVeto = _onBeforeReload?.call(new BeforeReloadContext(null, isolateRef)) ?? true;
        } else {
          for (final change in changes ?? <WatchEvent>[]) {
            if (!(_onBeforeReload?.call(new BeforeReloadContext(change, isolateRef)) ?? true)) {
              noVeto = false;  // <<< HERE a single event discards all the batch of events.
            }
          }
        }
      }

I would change the logic here so that the onBeforeReload becomes just a filter for events. If no events remain in the batch, we don't reload the code, otherwise we assume some other (not discarded) events cause hot reloading and launch the process.

What do you think?

[sebthom]

Sounds good!

[darkstarx]

May I make a PR on changing the logic of applying the _onBeforeReload?

[sebthom]

Sure.