Golang template.Template类代码示例

func tmplHTML(tmpl *template.Template, data *template.Data, err *error) func(string) string {
	return func(name string) (s string) {
		if *err != nil {
			return
		}
		s, *err = tmpl.ExecuteHTMLString(name, data)
		return s
	}
}

func main() {
	flag.Parse()

	if *showVersion {
		fmt.Fprintln(os.Stdout, version.Print("alertmanager"))
		os.Exit(0)
	}

	log.Infoln("Starting alertmanager", version.Info())
	log.Infoln("Build context", version.BuildContext())

	err := os.MkdirAll(*dataDir, 0777)
	if err != nil {
		log.Fatal(err)
	}

	marker := types.NewMarker()

	alerts, err := boltmem.NewAlerts(*dataDir)
	if err != nil {
		log.Fatal(err)
	}
	defer alerts.Close()

	notifies, err := boltmem.NewNotificationInfo(*dataDir)
	if err != nil {
		log.Fatal(err)
	}
	defer notifies.Close()

	silences, err := boltmem.NewSilences(*dataDir, marker)
	if err != nil {
		log.Fatal(err)
	}
	defer silences.Close()

	var (
		inhibitor *Inhibitor
		tmpl      *template.Template
		disp      *Dispatcher
	)
	defer disp.Stop()

	api := NewAPI(alerts, silences, func() AlertOverview {
		return disp.Groups()
	})

	build := func(rcvs []*config.Receiver) notify.Notifier {
		var (
			router  = notify.Router{}
			fanouts = notify.Build(rcvs, tmpl)
		)
		for name, fo := range fanouts {
			for i, n := range fo {
				n = notify.Retry(n)
				n = notify.Log(n, log.With("step", "retry"))
				n = notify.Dedup(notifies, n)
				n = notify.Log(n, log.With("step", "dedup"))

				fo[i] = n
			}
			router[name] = fo
		}
		n := notify.Notifier(router)

		n = notify.Log(n, log.With("step", "route"))
		n = notify.Silence(silences, n, marker)
		n = notify.Log(n, log.With("step", "silence"))
		n = notify.Inhibit(inhibitor, n, marker)
		n = notify.Log(n, log.With("step", "inhibit"))

		return n
	}

	amURL, err := extURL(*externalURL)
	if err != nil {
		log.Fatal(err)
	}

	reload := func() (err error) {
		log.With("file", *configFile).Infof("Loading configuration file")
		defer func() {
			if err != nil {
				log.With("file", *configFile).Errorf("Loading configuration file failed: %s", err)
				configSuccess.Set(0)
			} else {
				configSuccess.Set(1)
				configSuccessTime.Set(float64(time.Now().Unix()))
			}
		}()

		conf, err := config.LoadFile(*configFile)
		if err != nil {
			return err
		}

		api.Update(conf.String(), time.Duration(conf.Global.ResolveTimeout))

		tmpl, err = template.FromGlobs(conf.Templates...)
		if err != nil {
//.........这里部分代码省略.........

func main() {
	peers := &stringset{}
	var (
		showVersion = flag.Bool("version", false, "Print version information.")

		configFile = flag.String("config.file", "alertmanager.yml", "Alertmanager configuration file name.")
		dataDir    = flag.String("storage.path", "data/", "Base path for data storage.")
		retention  = flag.Duration("data.retention", 5*24*time.Hour, "How long to keep data for.")

		externalURL   = flag.String("web.external-url", "", "The URL under which Alertmanager is externally reachable (for example, if Alertmanager is served via a reverse proxy). Used for generating relative and absolute links back to Alertmanager itself. If the URL has a path portion, it will be used to prefix all HTTP endpoints served by Alertmanager. If omitted, relevant URL components will be derived automatically.")
		listenAddress = flag.String("web.listen-address", ":9093", "Address to listen on for the web interface and API.")

		meshListen = flag.String("mesh.listen-address", net.JoinHostPort("0.0.0.0", strconv.Itoa(mesh.Port)), "mesh listen address")
		hwaddr     = flag.String("mesh.hardware-address", mustHardwareAddr(), "MAC address, i.e. mesh peer ID")
		nickname   = flag.String("mesh.nickname", mustHostname(), "peer nickname")
	)
	flag.Var(peers, "mesh.peer", "initial peers (may be repeated)")
	flag.Parse()

	if len(flag.Args()) > 0 {
		log.Fatalln("Received unexpected and unparsed arguments: ", strings.Join(flag.Args(), ", "))
	}

	if *showVersion {
		fmt.Fprintln(os.Stdout, version.Print("alertmanager"))
		os.Exit(0)
	}

	log.Infoln("Starting alertmanager", version.Info())
	log.Infoln("Build context", version.BuildContext())

	err := os.MkdirAll(*dataDir, 0777)
	if err != nil {
		log.Fatal(err)
	}

	logger := log.NewLogger(os.Stderr)
	mrouter := initMesh(*meshListen, *hwaddr, *nickname)

	stopc := make(chan struct{})
	var wg sync.WaitGroup
	wg.Add(1)

	notificationLog, err := nflog.New(
		nflog.WithMesh(func(g mesh.Gossiper) mesh.Gossip {
			return mrouter.NewGossip("nflog", g)
		}),
		nflog.WithRetention(*retention),
		nflog.WithSnapshot(filepath.Join(*dataDir, "nflog")),
		nflog.WithMaintenance(15*time.Minute, stopc, wg.Done),
		nflog.WithLogger(logger.With("component", "nflog")),
	)
	if err != nil {
		log.Fatal(err)
	}

	marker := types.NewMarker()

	silences, err := silence.New(silence.Options{
		SnapshotFile: filepath.Join(*dataDir, "silences"),
		Retention:    *retention,
		Logger:       logger.With("component", "silences"),
		Gossip: func(g mesh.Gossiper) mesh.Gossip {
			return mrouter.NewGossip("silences", g)
		},
	})
	if err != nil {
		log.Fatal(err)
	}

	// Start providers before router potentially sends updates.
	wg.Add(1)
	go func() {
		silences.Maintenance(15*time.Minute, filepath.Join(*dataDir, "silences"), stopc)
		wg.Done()
	}()

	mrouter.Start()

	defer func() {
		close(stopc)
		// Stop receiving updates from router before shutting down.
		mrouter.Stop()
		wg.Wait()
	}()

	mrouter.ConnectionMaker.InitiateConnections(peers.slice(), true)

	alerts, err := mem.NewAlerts(*dataDir)
	if err != nil {
		log.Fatal(err)
	}
	defer alerts.Close()

	var (
		inhibitor *inhibit.Inhibitor
		tmpl      *template.Template
		pipeline  notify.Stage
		disp      *dispatch.Dispatcher
	)
//.........这里部分代码省略.........

func main() {
	flag.Parse()

	printVersion()
	if *showVersion {
		os.Exit(0)
	}

	err := os.MkdirAll(*dataDir, 0777)
	if err != nil {
		log.Fatal(err)
	}
	db, err := sql.Open("sqlite3", filepath.Join(*dataDir, "am.db"))
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()

	marker := types.NewMarker()

	alerts, err := sqlite.NewAlerts(db)
	if err != nil {
		log.Fatal(err)
	}
	notifies, err := sqlite.NewNotifies(db)
	if err != nil {
		log.Fatal(err)
	}
	silences, err := sqlite.NewSilences(db, marker)
	if err != nil {
		log.Fatal(err)
	}

	var (
		inhibitor *Inhibitor
		tmpl      *template.Template
		disp      *Dispatcher
	)
	defer disp.Stop()

	api := NewAPI(alerts, silences, func() AlertOverview {
		return disp.Groups()
	})

	build := func(rcvs []*config.Receiver) notify.Notifier {
		var (
			router  = notify.Router{}
			fanouts = notify.Build(rcvs, tmpl)
		)
		for name, fo := range fanouts {
			for i, n := range fo {
				n = notify.Retry(n)
				n = notify.Log(n, log.With("step", "retry"))
				n = notify.Dedup(notifies, n)
				n = notify.Log(n, log.With("step", "dedup"))

				fo[i] = n
			}
			router[name] = fo
		}
		n := notify.Notifier(router)

		n = notify.Log(n, log.With("step", "route"))
		n = notify.Silence(silences, n, marker)
		n = notify.Log(n, log.With("step", "silence"))
		n = notify.Inhibit(inhibitor, n, marker)
		n = notify.Log(n, log.With("step", "inhibit"))

		return n
	}

	amURL, err := extURL(*externalURL)
	if err != nil {
		log.Fatal(err)
	}

	reload := func() (err error) {
		log.With("file", *configFile).Infof("Loading configuration file")
		defer func() {
			if err != nil {
				log.With("file", *configFile).Errorf("Loading configuration file failed: %s", err)
				configSuccess.Set(0)
			} else {
				configSuccess.Set(1)
				configSuccessTime.Set(float64(time.Now().Unix()))
			}
		}()

		conf, err := config.LoadFile(*configFile)
		if err != nil {
			return err
		}

		api.Update(conf.String(), time.Duration(conf.Global.ResolveTimeout))

		tmpl, err = template.FromGlobs(conf.Templates...)
		if err != nil {
			return err
		}
		tmpl.ExternalURL = amURL
//.........这里部分代码省略.........