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Check if the file is already watched first #235

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Check if the file is already watched first #235

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12 changes: 6 additions & 6 deletions realize/notify.go
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Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,12 @@ func (w *filePoller) Add(name string) error {
return errPollerClosed
}

if w.watches == nil {
w.watches = make(map[string]chan struct{})
} else if _, exists := w.watches[name]; exists {
return fmt.Errorf("watch exists")
}

f, err := os.Open(name)
if err != nil {
return err
Expand All @@ -146,12 +152,6 @@ func (w *filePoller) Add(name string) error {
return err
}

if w.watches == nil {
w.watches = make(map[string]chan struct{})
}
if _, exists := w.watches[name]; exists {
return fmt.Errorf("watch exists")
}
chClose := make(chan struct{})
w.watches[name] = chClose
go w.watch(f, fi, chClose)
Expand Down