Struct arti::reload_cfg::FileWatcher

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struct FileWatcher {
    _watcher: RecommendedWatcher,
}
Expand description

A wrapper around notify::RecommendedWatcher to watch a set of parent directories in order to learn about changes in some specific files that they contain.

The wrapper contains the Watcher and also the channel for receiving events.

The Watcher implementation in notify has a weakness: it gives sensible results when you’re watching directories, but if you start watching non-directory files, it won’t notice when those files get replaced. That’s a problem for users who want to change their configuration atomically by making new files and then moving them into place over the old ones.

For more background on the issues with notify, see https://github.com/notify-rs/notify/issues/165 and https://github.com/notify-rs/notify/pull/166.

TODO: Someday we might want to make this code exported someplace. If we do, we should test it, and improve its API a lot. Right now, the caller needs to mess around with std::sync::mpsc and filter out the events they want using FileWatcher::event_matched.

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§_watcher: RecommendedWatcher

An underlying notify watcher that tells us about directory changes.

Implementations§

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impl FileWatcher

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fn builder() -> FileWatcherBuilder

Create a FileWatcherBuilder

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