fix: provider auto update

rule/provider/fetcher.go

@@ -44,6 +44,12 @@ func (f *fetcher) Initial() (interface{}, error) {
 		err      error
 	)
 
+	defer func() {
+		if f.ticker != nil {
+			go f.pullLoop()
+		}
+	}()
+
 	if stat, fErr := os.Stat(f.vehicle.Path()); fErr == nil {
 		buf, err = ioutil.ReadFile(f.vehicle.Path())
 		modTime := stat.ModTime()
@@ -83,9 +89,6 @@ func (f *fetcher) Initial() (interface{}, error) {
 	}
 
 	f.hash = md5.Sum(buf)
-	if f.ticker != nil {
-		go f.pullLoop()
-	}
 
 	return rules, nil
 }

rule/provider/provider.go

@@ -118,7 +118,8 @@ func NewRuleSetProvider(name string, behavior P.RuleType, interval time.Duration
 		rp,
 	}
 
-	runtime.SetFinalizer(wrapper, rp.fetcher.Destroy())
+	final := func(provider *RuleSetProvider) { rp.fetcher.Destroy() }
+	runtime.SetFinalizer(wrapper, final)
 	return wrapper
 }