Function write_lambda_log

llrt_core/src/modules/console.rs:176–328

(
    ctx: &Ctx<'js>,
    result: &mut String,
    args: Rest<Value<'js>>,
    level: LogLevel,
    is_tty: bool,
    is_json_log_format: bool,
    max_log_level: usize,
    time_format: &str,
)

#[inline(always)]
#[allow(clippy::too_many_arguments)]
fn write_lambda_log<'js>(
    ctx: &Ctx<'js>,
    result: &mut String,
    args: Rest<Value<'js>>,
    level: LogLevel,
    is_tty: bool,
    is_json_log_format: bool,
    max_log_level: usize,
    time_format: &str,
) -> Result<bool> {
    let mut is_newline = true;

    //do not log if we don't meet the log level
    if is_json_log_format && (level.clone() as usize) < max_log_level {
        return Ok(false);
    }
    result.reserve(64);
    if !is_tty {
        is_newline = false;
    }

    let current_time = Timestamp::now();
    let formatted_time = current_time.strftime(time_format);
    let request_id = runtime_client::LAMBDA_REQUEST_ID.read().unwrap();

    if is_json_log_format {
        result.push('{');
        //time
        result.push_str("\"time\":\"");
        write!(result, "{}", formatted_time).unwrap();
        result.push_str("\",");

        //request id
        if let Some(id) = request_id.as_ref() {
            result.push_str("\"requestId\":\"");
            result.push_str(id);
            result.push_str("\",");
        }

        //level
        result.push_str("\"level\":\"");
        result.push_str(&level.to_string());
        result.push('\"');
    } else {
        write!(result, "{}", formatted_time).unwrap();
        result.push('\t');

        match request_id.as_ref() {
            Some(id) => result.push_str(id),
            None => result.push_str("n/a"),
        }

        result.push('\t');
        result.push_str(&level.to_string());
        result.push('\t');
    }

    if is_json_log_format {