Question about unmarshalling config.alloy

Grafana Alloy
1

Hi all,

I’m trying to unmarshal config.alloy to struct using syntax.go (alloy/syntax/syntax.go at main · grafana/alloy · GitHub), and may I ask 2 questions?

data, err := os.ReadFile("config_formatted.alloy")
if err != nil {
	panic(err)
}

var configOut Config

err = syntax.Unmarshal(data, &configOut)
if err != nil {
	panic(err)
}

  1. What should be the type for block reference attribute, like forward_to (e.g., forward_to = [loki.process.user_logs_limit.receiver] or metrics = [otelcol.exporter.otlphttp.metricsotlp.input])?
    I tried []interface{} but it didn’t work.(panic: 36:25: identifier "prometheus" does not exist)

  2. What should be the type for attributes with env(...) & string value (e.g., __path__ = env("SOME_ENV"), and __path__ = "C:\\logpath",)?

Thanks in advance!