Function LoadFile

config/config.go:131–157

LoadFile parses and validates the given YAML file into a read-only Config. Callers should never write to or shallow copy the returned Config.

(filename string, agentMode bool, logger *slog.Logger)

// LoadFile parses and validates the given YAML file into a read-only Config.
// Callers should never write to or shallow copy the returned Config.
func LoadFile(filename string, agentMode bool, logger *slog.Logger) (*Config, error) {
	content, err := os.ReadFile(filename)
	if err != nil {
		return nil, err
	}
	cfg, err := Load(string(content), logger)
	if err != nil {
		return nil, fmt.Errorf("parsing YAML file %s: %w", filename, err)
	}

	if agentMode {
		if len(cfg.AlertingConfig.AlertmanagerConfigs) > 0 || len(cfg.AlertingConfig.AlertRelabelConfigs) > 0 {
			return nil, errors.New("field alerting is not allowed in agent mode")
		}

		if len(cfg.RuleFiles) > 0 {
			return nil, errors.New("field rule_files is not allowed in agent mode")
		}

		if len(cfg.RemoteReadConfigs) > 0 {
			return nil, errors.New("field remote_read is not allowed in agent mode")
		}
	}

	cfg.SetDirectory(filepath.Dir(filename))
	return cfg, nil
}

func boolPtr(b bool) *bool {
	return &b