Function format

packages/effect/src/internal/logger.ts:179–209

(quoteValue: (s: string) => string, whitespace?: number | string | undefined)

 * @internal
 */
const format = (quoteValue: (s: string) => string, whitespace?: number | string | undefined) =>
(
  { annotations, cause, date, fiberId, logLevel, message, spans }: Logger.Logger.Options<unknown>
): string => {
  const formatValue = (value: string): string => value.match(textOnly) ? value : quoteValue(value)
  const format = (label: string, value: string): string => `${logSpan_.formatLabel(label)}=${formatValue(value)}`
  const append = (label: string, value: string): string => " " + format(label, value)

  let out = format("timestamp", date.toISOString())
  out += append("level", logLevel.label)
  out += append("fiber", fiberId_.threadName(fiberId))

  const messages = Arr.ensure(message)
  for (let i = 0; i < messages.length; i++) {
    out += append("message", Inspectable.toStringUnknown(messages[i], whitespace))
  }

  if (!Cause.isEmptyType(cause)) {
    out += append("cause", Cause.pretty(cause, { renderErrorCause: true }))
  }

  for (const span of spans) {
    out += " " + logSpan_.render(date.getTime())(span)
  }

  for (const [label, value] of annotations) {
    out += append(label, Inspectable.toStringUnknown(value, whitespace))
  }

  return out
}

/** @internal */
const escapeDoubleQuotes = (s: string) => `"${s.replace(/\\([\s\S])|(")/g, "\\$1$2")}"`