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my-app/node_modules/webpack/lib/node/ReadFileChunkLoadingRuntimeModule.js
generated
vendored
Executable file
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my-app/node_modules/webpack/lib/node/ReadFileChunkLoadingRuntimeModule.js
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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*/
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"use strict";
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const RuntimeGlobals = require("../RuntimeGlobals");
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const RuntimeModule = require("../RuntimeModule");
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const Template = require("../Template");
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const {
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chunkHasJs,
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getChunkFilenameTemplate
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} = require("../javascript/JavascriptModulesPlugin");
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const { getInitialChunkIds } = require("../javascript/StartupHelpers");
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const compileBooleanMatcher = require("../util/compileBooleanMatcher");
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const { getUndoPath } = require("../util/identifier");
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/** @typedef {import("../Chunk")} Chunk */
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/** @typedef {import("../ChunkGraph")} ChunkGraph */
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/** @typedef {import("../Compilation")} Compilation */
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class ReadFileChunkLoadingRuntimeModule extends RuntimeModule {
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/**
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* @param {ReadonlySet<string>} runtimeRequirements runtime requirements
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*/
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constructor(runtimeRequirements) {
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super("readFile chunk loading", RuntimeModule.STAGE_ATTACH);
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this.runtimeRequirements = runtimeRequirements;
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}
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/**
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* @private
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* @param {Chunk} chunk chunk
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* @param {string} rootOutputDir root output directory
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* @returns {string} generated code
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*/
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_generateBaseUri(chunk, rootOutputDir) {
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const options = chunk.getEntryOptions();
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if (options && options.baseUri) {
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return `${RuntimeGlobals.baseURI} = ${JSON.stringify(options.baseUri)};`;
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}
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return `${RuntimeGlobals.baseURI} = require("url").pathToFileURL(${
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rootOutputDir
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? `__dirname + ${JSON.stringify("/" + rootOutputDir)}`
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: "__filename"
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});`;
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}
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/**
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* @returns {string | null} runtime code
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*/
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generate() {
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const compilation = /** @type {Compilation} */ (this.compilation);
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const chunkGraph = /** @type {ChunkGraph} */ (this.chunkGraph);
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const chunk = /** @type {Chunk} */ (this.chunk);
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const { runtimeTemplate } = compilation;
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const fn = RuntimeGlobals.ensureChunkHandlers;
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const withBaseURI = this.runtimeRequirements.has(RuntimeGlobals.baseURI);
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const withExternalInstallChunk = this.runtimeRequirements.has(
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RuntimeGlobals.externalInstallChunk
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);
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const withOnChunkLoad = this.runtimeRequirements.has(
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RuntimeGlobals.onChunksLoaded
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);
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const withLoading = this.runtimeRequirements.has(
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RuntimeGlobals.ensureChunkHandlers
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);
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const withHmr = this.runtimeRequirements.has(
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RuntimeGlobals.hmrDownloadUpdateHandlers
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);
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const withHmrManifest = this.runtimeRequirements.has(
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RuntimeGlobals.hmrDownloadManifest
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);
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const conditionMap = chunkGraph.getChunkConditionMap(chunk, chunkHasJs);
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const hasJsMatcher = compileBooleanMatcher(conditionMap);
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const initialChunkIds = getInitialChunkIds(chunk, chunkGraph, chunkHasJs);
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const outputName = compilation.getPath(
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getChunkFilenameTemplate(chunk, compilation.outputOptions),
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{
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chunk,
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contentHashType: "javascript"
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}
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);
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const rootOutputDir = getUndoPath(
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outputName,
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/** @type {string} */ (compilation.outputOptions.path),
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false
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);
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const stateExpression = withHmr
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? `${RuntimeGlobals.hmrRuntimeStatePrefix}_readFileVm`
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: undefined;
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return Template.asString([
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withBaseURI
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? this._generateBaseUri(chunk, rootOutputDir)
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: "// no baseURI",
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"",
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"// object to store loaded chunks",
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'// "0" means "already loaded", Promise means loading',
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`var installedChunks = ${
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stateExpression ? `${stateExpression} = ${stateExpression} || ` : ""
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}{`,
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Template.indent(
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Array.from(initialChunkIds, id => `${JSON.stringify(id)}: 0`).join(
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",\n"
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)
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),
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"};",
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"",
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withOnChunkLoad
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? `${
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RuntimeGlobals.onChunksLoaded
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}.readFileVm = ${runtimeTemplate.returningFunction(
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"installedChunks[chunkId] === 0",
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"chunkId"
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)};`
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: "// no on chunks loaded",
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"",
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withLoading || withExternalInstallChunk
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? `var installChunk = ${runtimeTemplate.basicFunction("chunk", [
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"var moreModules = chunk.modules, chunkIds = chunk.ids, runtime = chunk.runtime;",
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"for(var moduleId in moreModules) {",
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Template.indent([
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`if(${RuntimeGlobals.hasOwnProperty}(moreModules, moduleId)) {`,
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Template.indent([
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`${RuntimeGlobals.moduleFactories}[moduleId] = moreModules[moduleId];`
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]),
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"}"
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]),
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"}",
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`if(runtime) runtime(${RuntimeGlobals.require});`,
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"for(var i = 0; i < chunkIds.length; i++) {",
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Template.indent([
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"if(installedChunks[chunkIds[i]]) {",
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Template.indent(["installedChunks[chunkIds[i]][0]();"]),
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"}",
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"installedChunks[chunkIds[i]] = 0;"
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]),
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"}",
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withOnChunkLoad ? `${RuntimeGlobals.onChunksLoaded}();` : ""
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])};`
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: "// no chunk install function needed",
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"",
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withLoading
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? Template.asString([
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"// ReadFile + VM.run chunk loading for javascript",
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`${fn}.readFileVm = function(chunkId, promises) {`,
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hasJsMatcher !== false
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? Template.indent([
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"",
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"var installedChunkData = installedChunks[chunkId];",
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'if(installedChunkData !== 0) { // 0 means "already installed".',
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Template.indent([
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'// array of [resolve, reject, promise] means "currently loading"',
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"if(installedChunkData) {",
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Template.indent(["promises.push(installedChunkData[2]);"]),
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"} else {",
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Template.indent([
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hasJsMatcher === true
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? "if(true) { // all chunks have JS"
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: `if(${hasJsMatcher("chunkId")}) {`,
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Template.indent([
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"// load the chunk and return promise to it",
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"var promise = new Promise(function(resolve, reject) {",
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Template.indent([
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"installedChunkData = installedChunks[chunkId] = [resolve, reject];",
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`var filename = require('path').join(__dirname, ${JSON.stringify(
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rootOutputDir
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)} + ${
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RuntimeGlobals.getChunkScriptFilename
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}(chunkId));`,
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"require('fs').readFile(filename, 'utf-8', function(err, content) {",
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Template.indent([
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"if(err) return reject(err);",
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"var chunk = {};",
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"require('vm').runInThisContext('(function(exports, require, __dirname, __filename) {' + content + '\\n})', filename)" +
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"(chunk, require, require('path').dirname(filename), filename);",
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"installChunk(chunk);"
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]),
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"});"
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]),
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"});",
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"promises.push(installedChunkData[2] = promise);"
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]),
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hasJsMatcher === true
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? "}"
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: "} else installedChunks[chunkId] = 0;"
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]),
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"}"
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]),
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"}"
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])
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: Template.indent(["installedChunks[chunkId] = 0;"]),
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"};"
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])
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: "// no chunk loading",
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"",
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withExternalInstallChunk
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? Template.asString([
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`module.exports = ${RuntimeGlobals.require};`,
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`${RuntimeGlobals.externalInstallChunk} = installChunk;`
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])
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: "// no external install chunk",
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"",
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withHmr
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? Template.asString([
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"function loadUpdateChunk(chunkId, updatedModulesList) {",
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Template.indent([
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"return new Promise(function(resolve, reject) {",
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Template.indent([
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`var filename = require('path').join(__dirname, ${JSON.stringify(
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rootOutputDir
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)} + ${RuntimeGlobals.getChunkUpdateScriptFilename}(chunkId));`,
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"require('fs').readFile(filename, 'utf-8', function(err, content) {",
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Template.indent([
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"if(err) return reject(err);",
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"var update = {};",
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"require('vm').runInThisContext('(function(exports, require, __dirname, __filename) {' + content + '\\n})', filename)" +
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"(update, require, require('path').dirname(filename), filename);",
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"var updatedModules = update.modules;",
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"var runtime = update.runtime;",
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"for(var moduleId in updatedModules) {",
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Template.indent([
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`if(${RuntimeGlobals.hasOwnProperty}(updatedModules, moduleId)) {`,
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Template.indent([
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`currentUpdate[moduleId] = updatedModules[moduleId];`,
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"if(updatedModulesList) updatedModulesList.push(moduleId);"
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]),
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"}"
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]),
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"}",
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"if(runtime) currentUpdateRuntime.push(runtime);",
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"resolve();"
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]),
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"});"
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]),
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"});"
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]),
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"}",
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"",
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Template.getFunctionContent(
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require("../hmr/JavascriptHotModuleReplacement.runtime.js")
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)
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.replace(/\$key\$/g, "readFileVm")
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.replace(/\$installedChunks\$/g, "installedChunks")
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.replace(/\$loadUpdateChunk\$/g, "loadUpdateChunk")
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.replace(/\$moduleCache\$/g, RuntimeGlobals.moduleCache)
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.replace(/\$moduleFactories\$/g, RuntimeGlobals.moduleFactories)
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.replace(
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/\$ensureChunkHandlers\$/g,
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RuntimeGlobals.ensureChunkHandlers
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)
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.replace(/\$hasOwnProperty\$/g, RuntimeGlobals.hasOwnProperty)
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.replace(/\$hmrModuleData\$/g, RuntimeGlobals.hmrModuleData)
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.replace(
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/\$hmrDownloadUpdateHandlers\$/g,
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RuntimeGlobals.hmrDownloadUpdateHandlers
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)
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.replace(
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/\$hmrInvalidateModuleHandlers\$/g,
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RuntimeGlobals.hmrInvalidateModuleHandlers
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)
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])
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: "// no HMR",
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"",
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withHmrManifest
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? Template.asString([
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`${RuntimeGlobals.hmrDownloadManifest} = function() {`,
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Template.indent([
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"return new Promise(function(resolve, reject) {",
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Template.indent([
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`var filename = require('path').join(__dirname, ${JSON.stringify(
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rootOutputDir
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)} + ${RuntimeGlobals.getUpdateManifestFilename}());`,
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"require('fs').readFile(filename, 'utf-8', function(err, content) {",
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Template.indent([
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"if(err) {",
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Template.indent([
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'if(err.code === "ENOENT") return resolve();',
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"return reject(err);"
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]),
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"}",
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"try { resolve(JSON.parse(content)); }",
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"catch(e) { reject(e); }"
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]),
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"});"
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]),
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"});"
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]),
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"}"
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])
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: "// no HMR manifest"
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]);
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}
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}
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module.exports = ReadFileChunkLoadingRuntimeModule;
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