Function resolveEnvironmentResolveOptions

packages/vite/src/node/config.ts:1100–1152

* alias and preserveSymlinks are not per-environment options, but they are * included in the resolved environment options for convenience.

(
  resolve: EnvironmentResolveOptions | undefined,
  alias: Alias[],
  preserveSymlinks: boolean,
  logger: Logger,
  /** undefined when resolving the top-level resolve options */
  consumer: 'client' | 'server' | undefined,
  // Backward compatibility
  isSsrTargetWebworkerEnvironment?: boolean,
)

 * included in the resolved environment options for convenience.
 */
function resolveEnvironmentResolveOptions(
  resolve: EnvironmentResolveOptions | undefined,
  alias: Alias[],
  preserveSymlinks: boolean,
  logger: Logger,
  /** undefined when resolving the top-level resolve options */
  consumer: 'client' | 'server' | undefined,
  // Backward compatibility
  isSsrTargetWebworkerEnvironment?: boolean,
): ResolvedAllResolveOptions {
  const resolvedResolve: ResolvedAllResolveOptions = mergeWithDefaults(
    {
      ...configDefaults.resolve,
      mainFields:
        consumer === undefined ||
        consumer === 'client' ||
        isSsrTargetWebworkerEnvironment
          ? DEFAULT_CLIENT_MAIN_FIELDS
          : DEFAULT_SERVER_MAIN_FIELDS,
      conditions:
        consumer === undefined ||
        consumer === 'client' ||
        isSsrTargetWebworkerEnvironment
          ? DEFAULT_CLIENT_CONDITIONS
          : DEFAULT_SERVER_CONDITIONS.filter((c) => c !== 'browser'),
      builtins:
        resolve?.builtins ??
        (consumer === 'server'
          ? isSsrTargetWebworkerEnvironment && resolve?.noExternal === true
            ? []
            : nodeLikeBuiltins
          : []),
    },
    resolve ?? {},
  )
  resolvedResolve.preserveSymlinks = preserveSymlinks
  resolvedResolve.alias = alias

  if (
    // @ts-expect-error removed field
    resolve?.browserField === false &&
    resolvedResolve.mainFields.includes('browser')
  ) {
    logger.warn(
      colors.yellow(
        `\`resolve.browserField\` is set to false, but the option is removed in favour of ` +
          `the 'browser' string in \`resolve.mainFields\`. You may want to update \`resolve.mainFields\` ` +
          `to remove the 'browser' string and preserve the previous browser behaviour.`,
      ),
    )
  }
  return resolvedResolve
}

function resolveResolveOptions(
  resolve: AllResolveOptions | undefined,