Function getOverriddenKnobKeyValues

fdbserver/tester.actor.cpp:1406–1435

In the current TOML scope, look for "knobs" field. If exists, translate all key value pairs into KnobKeyValuePairs

// In the current TOML scope, look for "knobs" field. If exists, translate all
// key value pairs into KnobKeyValuePairs
KnobKeyValuePairs getOverriddenKnobKeyValues(const toml::value& context) {
	KnobKeyValuePairs result;

	try {
		const toml::array& overrideKnobs = toml::find(context, "knobs").as_array();
		for (const toml::value& knob : overrideKnobs) {
			for (const auto& [key, value_] : knob.as_table()) {
				const std::string& value = toml_to_string(value_);
				ParsedKnobValue parsedValue = CLIENT_KNOBS->parseKnobValue(key, value);
				if (std::get_if<NoKnobFound>(&parsedValue)) {
					parsedValue = SERVER_KNOBS->parseKnobValue(key, value);
				}
				if (std::get_if<NoKnobFound>(&parsedValue)) {
					parsedValue = FLOW_KNOBS->parseKnobValue(key, value);
				}
				if (std::get_if<NoKnobFound>(&parsedValue)) {
					TraceEvent(SevError, "TestSpecUnrecognizedKnob")
					    .detail("KnobName", key)
					    .detail("OverrideValue", value);
					continue;
				}
				result.set(key, parsedValue);
			}
		}
	} catch (const std::out_of_range&) {
		// No knobs field in this scope, this is not an error
	}

	return result;
}

} // namespace