watch

var Command = &cli.Command{
	Name:  "watch",
	Usage: "Automatically download multiple Live FC2 streams.",
	Flags: []cli.Flag{
		&cli.StringFlag{
			Name:        "config",
			Aliases:     []string{"c"},
			Required:    true,
			Usage:       `Config file path. (required)`,
			Destination: &configPath,
		},
		&cli.StringFlag{
			Name:        "pprof.listen-address",
			Value:       ":3000",
			Destination: &pprofListenAddress,
		},
	},
	Action: func(cCtx *cli.Context) error {
		ctx, cancel := context.WithCancel(cCtx.Context)

		cleanChan := make(chan os.Signal, 1)
		signal.Notify(cleanChan, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
		go func() {
			<-cleanChan
			cancel()
		}()

		configChan := make(chan *Config)
		go WatchConfig(ctx, configPath, configChan)

		go func() {
			http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
				s := state.DefaultState.ReadState()
				b, err := json.MarshalIndent(s, "", "  ")
				if err != nil {
					http.Error(w, err.Error(), http.StatusInternalServerError)
					return
				}
				_, err = w.Write(b)
				if err != nil {
					http.Error(w, err.Error(), http.StatusInternalServerError)
					return
				}
			})
			log.Info().Str("listenAddress", pprofListenAddress).Msg("listening")
			if err := http.ListenAndServe(pprofListenAddress, nil); err != nil {
				log.Fatal().Err(err).Msg("fail to serve http")
			}
			log.Fatal().Msg("http server stopped")
		}()

		return ConfigReloader(ctx, configChan, handleConfig)
	},
}