Inotify

const inotify = @import("otter_utils").inotify;

var watcher = try inotify.Watcher.init(allocator);
defer watcher.deinit();

_ = try watcher.addWatch("/path/to/file", inotify.Watcher.Mask.file_changes);
_ = try watcher.addWatch("/path/to/dir", inotify.Watcher.Mask.dir_changes);

// After poll reports readability:
while (watcher.nextEvent()) |event| {
    if (event.isModified()) { /* reload */ }
    if (event.isCreated()) { /* rescan dir */ }
}