Method setModule

packages/jest-haste-map/src/index.ts:460–521

(id: string, module: ModuleMetaData)

    const rootDir = this._options.rootDir;

    const setModule = (id: string, module: ModuleMetaData) => {
      let moduleMap = map.get(id);
      if (!moduleMap) {
        moduleMap = Object.create(null) as ModuleMapItem;
        map.set(id, moduleMap);
      }
      const platform =
        getPlatformExtension(module[H.PATH], this._options.platforms) ||
        H.GENERIC_PLATFORM;

      const existingModule = moduleMap[platform];

      if (existingModule && existingModule[H.PATH] !== module[H.PATH]) {
        const method = this._options.throwOnModuleCollision ? 'error' : 'warn';

        this._console[method](
          [
            `jest-haste-map: Haste module naming collision: ${id}`,
            '  The following files share their name; please adjust your hasteImpl:',
            `    * <rootDir>${path.sep}${existingModule[H.PATH]}`,
            `    * <rootDir>${path.sep}${module[H.PATH]}`,
            '',
          ].join('\n'),
        );

        if (this._options.throwOnModuleCollision) {
          throw new DuplicateError(existingModule[H.PATH], module[H.PATH]);
        }

        // We do NOT want consumers to use a module that is ambiguous.
        delete moduleMap[platform];

        if (Object.keys(moduleMap).length === 1) {
          map.delete(id);
        }

        let dupsByPlatform = hasteMap.duplicates.get(id);
        if (dupsByPlatform == null) {
          dupsByPlatform = new Map();
          hasteMap.duplicates.set(id, dupsByPlatform);
        }

        const dups = new Map([
          [module[H.PATH], module[H.TYPE]],
          [existingModule[H.PATH], existingModule[H.TYPE]],
        ]);
        dupsByPlatform.set(platform, dups);

        return;
      }

      const dupsByPlatform = hasteMap.duplicates.get(id);
      if (dupsByPlatform != null) {
        const dups = dupsByPlatform.get(platform);
        if (dups != null) {
          dups.set(module[H.PATH], module[H.TYPE]);
        }
        return;