Function LoadFromJSON

internal/telemetry/config.go:71–106

LoadFromJSON merges telemetry settings from a JSON config file if present. This has lower priority than environment variables.

(cfg *Config, configPath string)

// LoadFromJSON merges telemetry settings from a JSON config file if present.
// This has lower priority than environment variables.
func LoadFromJSON(cfg *Config, configPath string) error {
	data, err := os.ReadFile(configPath)
	if err != nil {
		if os.IsNotExist(err) {
			return nil
		}
		return err
	}

	var root struct {
		Telemetry *telemetrySection `json:"telemetry"`
	}
	if err := json.Unmarshal(data, &root); err != nil {
		return nil // malformed JSON — skip silently
	}
	if root.Telemetry == nil {
		return nil
	}
	t := root.Telemetry
	if t.Enabled != nil {
		cfg.Enabled = *t.Enabled
	}
	if t.Exporter != nil && cfg.Exporter == defaultExporter {
		cfg.Exporter = *t.Exporter
	}
	if t.OTLPEndpoint != nil && cfg.OTLPEndpoint == "" {
		cfg.OTLPEndpoint = *t.OTLPEndpoint
		if cfg.Exporter == defaultExporter {
			cfg.Exporter = "otlp"
		}
	}
	if t.ContentLog != nil {
		cfg.ContentLog = *t.ContentLog
	}
	return nil
}

// ResolveConfig builds the final Config by merging defaults, JSON config, and env vars.
// Precedence: defaults < config.json < environment variables.