Update dependencies

vendor/github.com/illarion/gonotify/v2/filewatcher.go

@@ -0,0 +1,89 @@
+package gonotify
+
+import (
+	"context"
+	"path/filepath"
+)
+
+// FileWatcher waits for events generated by filesystem for a specific list of file paths, including
+// IN_CREATE for not yet existing files and IN_DELETE for removed.
+type FileWatcher struct {
+	C chan FileEvent
+}
+
+// NewFileWatcher creates FileWatcher with provided inotify mask and list of files to wait events for.
+func NewFileWatcher(ctx context.Context, mask uint32, files ...string) (*FileWatcher, error) {
+
+	f := &FileWatcher{
+		C: make(chan FileEvent),
+	}
+
+	ctx, cancel := context.WithCancel(ctx)
+
+	inotify, err := NewInotify(ctx)
+	if err != nil {
+		cancel()
+		return nil, err
+	}
+
+	expectedPaths := make(map[string]bool)
+
+	for _, file := range files {
+		err := inotify.AddWatch(filepath.Dir(file), mask)
+		if err != nil {
+			cancel()
+			return nil, err
+		}
+		expectedPaths[file] = true
+	}
+
+	events := make(chan FileEvent)
+
+	go func() {
+		defer cancel()
+		for {
+			raw, err := inotify.Read()
+
+			if err != nil {
+				close(events)
+				return
+			}
+
+			for _, event := range raw {
+				select {
+				case <-ctx.Done():
+					return
+				case events <- FileEvent{
+					InotifyEvent: event,
+				}: //noop
+				}
+			}
+		}
+	}()
+
+	go func() {
+		defer cancel()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case event, ok := <-events:
+
+				if !ok {
+					f.C <- FileEvent{
+						Eof: true,
+					}
+					return
+				}
+
+				if !expectedPaths[event.Name] {
+					continue
+				}
+
+				f.C <- event
+			}
+		}
+	}()
+
+	return f, nil
+}