bonsai-analyzer/bin/stats/splitUnreachableModules.js

Trim your dependency tree.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = splitUnreachableModules;

function splitUnreachableModules(extendedModulesById, blacklistedModuleIds) {
  // $FlowFixMe: flow thinks `values` returns `Array<mixed>`
  const modules = Object.values(extendedModulesById);

  if (blacklistedModuleIds.length === 0) {
    return {
      included: modules,
      removed: []
    };
  }

  const stringyModuleIds = modules.map(module => String(module.id));
  const stringyBlackListedIds = blacklistedModuleIds.map(String);

  const _relevantReasons = reason => stringyModuleIds.includes(String(reason.moduleId));

  const reachableModuleIds = modules.filter(module => !stringyBlackListedIds.includes(String(module.id)) && module.reasons.filter(_relevantReasons).length === 0).map(module => module.id);

  const _includableModule = module => !stringyBlackListedIds.includes(String(module.id));

  const push = module => {
    if (reachableModuleIds.includes(module.id)) {
      return;
    }

    reachableModuleIds.push(module.id);
  };

  let i = 0;

  while (i < reachableModuleIds.length) {
    const moduleId = reachableModuleIds[i];
    const module = extendedModulesById[moduleId];
    module.requirements.filter(_includableModule).map(push);
    i += 1;
  }

  return {
    included: modules.filter(module => reachableModuleIds.includes(module.id)),
    removed: modules.filter(module => !reachableModuleIds.includes(module.id))
  };
}