Function cmdAdaptConfig

cmd/commandfuncs.go:552–641

(fl Flags)

}

func cmdAdaptConfig(fl Flags) (int, error) {
	configFlag := fl.String("config")
	adapterFlag := fl.String("adapter")
	prettyFlag := fl.Bool("pretty")
	validateFlag := fl.Bool("validate")

	var err error
	configFlag, err = configFileWithRespectToDefault(caddy.Log(), configFlag)
	if err != nil {
		return caddy.ExitCodeFailedStartup, err
	}
	if configFlag == "" {
		return caddy.ExitCodeFailedStartup,
			fmt.Errorf("input file required when there is no Caddyfile in current directory (use --config flag)")
	}

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

	if adapterFlag == "" {
		return caddy.ExitCodeFailedStartup,
			fmt.Errorf("adapter name is required (use --adapt flag or leave unspecified for default)")
	}

	cfgAdapter := caddyconfig.GetAdapter(adapterFlag)
	if cfgAdapter == nil {
		return caddy.ExitCodeFailedStartup,
			fmt.Errorf("unrecognized config adapter: %s", adapterFlag)
	}

	var input []byte
	// read from stdin if the file name is "-"
	if configFlag == "-" {
		input, err = io.ReadAll(os.Stdin)
	} else {
		input, err = os.ReadFile(configFlag)
	}
	if err != nil {
		return caddy.ExitCodeFailedStartup,
			fmt.Errorf("reading input file: %v", err)
	}

	opts := map[string]any{"filename": configFlag}

	adaptedConfig, warnings, err := cfgAdapter.Adapt(input, opts)
	if err != nil {
		return caddy.ExitCodeFailedStartup, err
	}

	if prettyFlag {
		var prettyBuf bytes.Buffer
		err = json.Indent(&prettyBuf, adaptedConfig, "", "\t")
		if err != nil {
			return caddy.ExitCodeFailedStartup, err
		}