Function addContainerMetadata

src/cmap/handshake/client_metadata.ts:209–236

* @internal * Re-add each metadata value. * Attempt to add new env container metadata, but keep old data if it does not fit.

(originalMetadata: ClientMetadata)

 * Attempt to add new env container metadata, but keep old data if it does not fit.
 */
async function addContainerMetadata(originalMetadata: ClientMetadata): Promise<ClientMetadata> {
  const containerMetadata = await getContainerMetadata();
  if (Object.keys(containerMetadata).length === 0) return originalMetadata;

  const extendedMetadata = new LimitedSizeDocument(512);

  const extendedEnvMetadata: NonNullable<ClientMetadata['env']> = {
    ...originalMetadata?.env,
    container: containerMetadata
  };

  for (const [key, val] of Object.entries(originalMetadata)) {
    if (key !== 'env') {
      extendedMetadata.ifItFitsItSits(key, val);
    } else {
      if (!extendedMetadata.ifItFitsItSits('env', extendedEnvMetadata)) {
        // add in old data if newer / extended metadata does not fit
        extendedMetadata.ifItFitsItSits('env', val);
      }
    }
  }

  if (!('env' in originalMetadata)) {
    extendedMetadata.ifItFitsItSits('env', extendedEnvMetadata);
  }

  return extendedMetadata.toObject() as ClientMetadata;
}

/**
 * Collects FaaS metadata.