Function resolveWatchPlugin

packages/jest-resolve/src/utils.ts:133–152

(
  resolver: string | undefined | null,
  {
    filePath,
    rootDir,
    requireResolveFunction,
  }: {
    filePath: string;
    rootDir: string;
    requireResolveFunction: (moduleName: string) => string;
  },
)

 * 1. looks for <name> relative to Jest.
 */
export const resolveWatchPlugin = (
  resolver: string | undefined | null,
  {
    filePath,
    rootDir,
    requireResolveFunction,
  }: {
    filePath: string;
    rootDir: string;
    requireResolveFunction: (moduleName: string) => string;
  },
): string =>
  resolveWithPrefix(resolver, {
    filePath,
    humanOptionName: 'Watch plugin',
    optionName: 'watchPlugins',
    prefix: 'jest-watch-',
    requireResolveFunction,
    rootDir,
  });

/**
 * Finds the runner to use: