Function cmdRun

cmd/commandfuncs.go:188–354

(fl Flags)

}

func cmdRun(fl Flags) (int, error) {
	caddy.TrapSignals()

	// set up buffered logging for early startup
	// so that we can hold onto logs until after
	// the config is loaded (or fails to load)
	// so that we can write the logs to the user's
	// configured output. we must be sure to flush
	// on any error before the config is loaded.
	logger, defaultLogger, logBuffer := caddy.BufferedLog()

	undoMaxProcs := setResourceLimits(logger)
	defer undoMaxProcs()
	// release the local reference to the undo function so it can be GC'd;
	// the deferred call above has already captured the actual function value.
	undoMaxProcs = nil //nolint:ineffassign,wastedassign

	configFlag := fl.String("config")
	configAdapterFlag := fl.String("adapter")
	resumeFlag := fl.Bool("resume")
	printEnvFlag := fl.Bool("environ")
	watchFlag := fl.Bool("watch")
	pidfileFlag := fl.String("pidfile")
	pingbackFlag := fl.String("pingback")

	// load all additional envs as soon as possible
	err := handleEnvFileFlag(fl)
	if err != nil {
		logBuffer.FlushTo(defaultLogger)
		return caddy.ExitCodeFailedStartup, err
	}

	// if we are supposed to print the environment, do that first
	if printEnvFlag {
		printEnvironment()
	}

	// load the config, depending on flags
	var config []byte
	if resumeFlag {
		config, err = os.ReadFile(caddy.ConfigAutosavePath)
		if errors.Is(err, fs.ErrNotExist) {
			// not a bad error; just can't resume if autosave file doesn't exist
			logger.Info("no autosave file exists", zap.String("autosave_file", caddy.ConfigAutosavePath))
			resumeFlag = false
		} else if err != nil {
			logBuffer.FlushTo(defaultLogger)
			return caddy.ExitCodeFailedStartup, err
		} else {
			if configFlag == "" {
				logger.Info("resuming from last configuration",
					zap.String("autosave_file", caddy.ConfigAutosavePath))
			} else {
				// if they also specified a config file, user should be aware that we're not
				// using it (doing so could lead to data/config loss by overwriting!)
				logger.Warn("--config and --resume flags were used together; ignoring --config and resuming from last configuration",
					zap.String("autosave_file", caddy.ConfigAutosavePath))
			}