add func to autofix couters in repository

models/repo.go

 	// Prevent duplicate tasks.
 	isMirrorUpdating = false
 	isGitFscking     = false
+	isCheckRepos     = false
 )
 
 // MirrorUpdate checks and updates mirror repositories.
 		})
 }
 
+func CheckRepoStats() {
+	if isCheckRepos {
+		return
+	}
+	isCheckRepos = true
+	defer func() { isCheckRepos = false }()
+
+	// Check count watchers
+	results_watch, err := x.Query("SELECT r.id FROM `repository` r WHERE r.num_watches!=(SELECT count(*) FROM `watch` WHERE repo_id=r.id)")
+	if err != nil {
+		log.Error(4, "select repository check 'watch': %v", err)
+	}
+	for _, repo_id := range results_watch {
+		log.Info("updating repository count 'watch'")
+		repoID := com.StrTo(repo_id["id"]).MustInt64()
+		_, err := x.Exec("UPDATE `repository` SET num_watches=(SELECT count(*) FROM `watch` WHERE repo_id=?) WHERE id=?", repoID, repoID)
+		if err != nil {
+			log.Error(4, "update repository check 'watch', repo %v: %v", repo_id, err)
+		}
+	}
+
+	// Check count stars
+	results_star, err := x.Query("SELECT s.id FROM `repository` s WHERE s.num_stars!=(SELECT count(*) FROM `star` WHERE repo_id=s.id)")
+	if err != nil {
+		log.Error(4, "select repository check 'star': %v", err)
+	}
+	for _, repo_id := range results_star {
+		log.Info("updating repository count 'star'")
+		repoID := com.StrTo(repo_id["id"]).MustInt64()
+		_, err := x.Exec("UPDATE `repository` SET .num_stars=(SELECT count(*) FROM `star` WHERE repo_id=?) WHERE id=?", repoID, repoID)
+		if err != nil {
+			log.Error(4, "update repository check 'star', repo %v: %v", repo_id, err)
+		}
+	}
+}
+
 // _________        .__  .__        ___.                        __  .__
 // \_   ___ \  ____ |  | |  | _____ \_ |__   ________________ _/  |_|__| ____   ____
 // /    \  \/ /  _ \|  | |  | \__  \ | __ \ /  _ \_  __ \__  \\   __\  |/  _ \ /    \

modules/cron/manager.go

 	if setting.Git.Fsck.Enable {
 		c.AddFunc("Repository health check", fmt.Sprintf("@every %dh", setting.Git.Fsck.Interval), models.GitFsck)
 	}
+	c.AddFunc("Check repository statistics", "@every 24h", models.CheckRepoStats)
 	c.Start()
 }