Function createGraphHelpers

packager/src/ModuleGraph/Graph.js:103–172

(loadQueue, skip)

};

function createGraphHelpers(loadQueue, skip) {
  const modules = new Map([[null, createParentModule()]]);

  function collect(
    path = null,
    serialized = {entryModules: [], modules: []},
    seen = new Set(),
  ) {
    const module = modules.get(path);
    if (module == null || seen.has(path)) {
      return serialized;
    }

    const {dependencies} = module;
    if (path === null) {
      serialized.entryModules =
        dependencies.map(dep => nullthrows(modules.get(dep.path)));
    } else {
      serialized.modules.push(module);
      seen.add(path);
    }

    for (const dependency of dependencies) {
      collect(dependency.path, serialized, seen);
    }

    return serialized;
  }

  function loadModule(id, parent, parentDepIndex) {
    loadQueue.push(
      {id, parent},
      (error, file, dependencyIDs) =>
        onFileLoaded(error, file, dependencyIDs, id, parent, parentDepIndex),
    );
  }

  function onFileLoaded(
    error,
    file,
    dependencyIDs,
    id,
    parent,
    parentDependencyIndex,
  ) {
    if (error) {
      return;
    }

    const {path} = nullthrows(file);
    dependencyIDs = nullthrows(dependencyIDs);

    const parentModule = modules.get(parent);
    invariant(parentModule, 'Invalid parent module: ' + String(parent));
    parentModule.dependencies[parentDependencyIndex] = {id, path};

    if ((!skip || !skip.has(path)) && !modules.has(path)) {
      const module = {