58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
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package local
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import (
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"context"
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"errors"
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"path/filepath"
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"strings"
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"github.com/navidrome/navidrome/log"
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"github.com/rjeczalik/notify"
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)
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// Start starts a watcher on the whole FS and returns a channel to send detected changes.
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// It uses `notify` to detect changes in the filesystem, so it may not work on all platforms/use-cases.
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// Notoriously, it does not work on some networked mounts and Windows with WSL2.
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func (s *localStorage) Start(ctx context.Context) (<-chan string, error) {
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if !s.watching.CompareAndSwap(false, true) {
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return nil, errors.New("watcher already started")
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}
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input := make(chan notify.EventInfo, 1)
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output := make(chan string, 1)
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started := make(chan struct{})
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go func() {
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defer close(input)
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defer close(output)
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libPath := filepath.Join(s.u.Path, "...")
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log.Debug(ctx, "Starting watcher", "lib", libPath)
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err := notify.Watch(libPath, input, WatchEvents)
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if err != nil {
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log.Error("Error starting watcher", "lib", libPath, err)
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return
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}
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defer notify.Stop(input)
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close(started) // signals the main goroutine we have started
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for {
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select {
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case event := <-input:
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log.Trace(ctx, "Detected change", "event", event, "lib", s.u.Path)
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name := event.Path()
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name = strings.Replace(name, s.resolvedPath, s.u.Path, 1)
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output <- name
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case <-ctx.Done():
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log.Debug(ctx, "Stopping watcher", "path", s.u.Path)
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s.watching.Store(false)
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return
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}
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}
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}()
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select {
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case <-started:
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case <-ctx.Done():
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}
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return output, nil
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}
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