/
ContextModule.js
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/
ContextModule.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { OriginalSource, RawSource } = require("webpack-sources");
const AsyncDependenciesBlock = require("./AsyncDependenciesBlock");
const { makeWebpackError } = require("./HookWebpackError");
const Module = require("./Module");
const RuntimeGlobals = require("./RuntimeGlobals");
const Template = require("./Template");
const WebpackError = require("./WebpackError");
const {
compareLocations,
concatComparators,
compareSelect,
keepOriginalOrder,
compareModulesById
} = require("./util/comparators");
const { contextify, parseResource } = require("./util/identifier");
const makeSerializable = require("./util/makeSerializable");
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("../declarations/WebpackOptions").WebpackOptionsNormalized} WebpackOptions */
/** @typedef {import("./ChunkGraph")} ChunkGraph */
/** @typedef {import("./ChunkGroup").RawChunkGroupOptions} RawChunkGroupOptions */
/** @typedef {import("./Compilation")} Compilation */
/** @typedef {import("./DependencyTemplates")} DependencyTemplates */
/** @typedef {import("./Module").BuildMeta} BuildMeta */
/** @typedef {import("./Module").CodeGenerationContext} CodeGenerationContext */
/** @typedef {import("./Module").CodeGenerationResult} CodeGenerationResult */
/** @typedef {import("./Module").LibIdentOptions} LibIdentOptions */
/** @typedef {import("./Module").NeedBuildContext} NeedBuildContext */
/** @typedef {import("./ModuleGraph")} ModuleGraph */
/** @typedef {import("./RequestShortener")} RequestShortener */
/** @typedef {import("./ResolverFactory").ResolverWithOptions} ResolverWithOptions */
/** @typedef {import("./RuntimeTemplate")} RuntimeTemplate */
/** @typedef {import("./dependencies/ContextElementDependency")} ContextElementDependency */
/** @template T @typedef {import("./util/LazySet")<T>} LazySet<T> */
/** @typedef {import("./util/fs").InputFileSystem} InputFileSystem */
/** @typedef {"sync" | "eager" | "weak" | "async-weak" | "lazy" | "lazy-once"} ContextMode Context mode */
/**
* @typedef {Object} ContextOptions
* @property {ContextMode} mode
* @property {boolean} recursive
* @property {RegExp} regExp
* @property {"strict"|boolean=} namespaceObject
* @property {string=} addon
* @property {string=} chunkName
* @property {RegExp=} include
* @property {RegExp=} exclude
* @property {RawChunkGroupOptions=} groupOptions
* @property {string=} typePrefix
* @property {string=} category
* @property {string[][]=} referencedExports exports referenced from modules (won't be mangled)
*/
/**
* @typedef {Object} ContextModuleOptionsExtras
* @property {false|string|string[]} resource
* @property {string=} resourceQuery
* @property {string=} resourceFragment
* @property {TODO} resolveOptions
*/
/** @typedef {ContextOptions & ContextModuleOptionsExtras} ContextModuleOptions */
/**
* @callback ResolveDependenciesCallback
* @param {(Error | null)=} err
* @param {ContextElementDependency[]=} dependencies
*/
/**
* @callback ResolveDependencies
* @param {InputFileSystem} fs
* @param {ContextModuleOptions} options
* @param {ResolveDependenciesCallback} callback
*/
const SNAPSHOT_OPTIONS = { timestamp: true };
const TYPES = new Set(["javascript"]);
class ContextModule extends Module {
/**
* @param {ResolveDependencies} resolveDependencies function to get dependencies in this context
* @param {ContextModuleOptions} options options object
*/
constructor(resolveDependencies, options) {
if (!options || typeof options.resource === "string") {
const parsed = parseResource(
options ? /** @type {string} */ (options.resource) : ""
);
const resource = parsed.path;
const resourceQuery = (options && options.resourceQuery) || parsed.query;
const resourceFragment =
(options && options.resourceFragment) || parsed.fragment;
super("javascript/dynamic", resource);
/** @type {ContextModuleOptions} */
this.options = {
...options,
resource,
resourceQuery,
resourceFragment
};
} else {
super("javascript/dynamic");
/** @type {ContextModuleOptions} */
this.options = {
...options,
resource: options.resource,
resourceQuery: options.resourceQuery || "",
resourceFragment: options.resourceFragment || ""
};
}
// Info from Factory
this.resolveDependencies = resolveDependencies;
if (options && options.resolveOptions !== undefined) {
this.resolveOptions = options.resolveOptions;
}
if (options && typeof options.mode !== "string") {
throw new Error("options.mode is a required option");
}
this._identifier = this._createIdentifier();
this._forceBuild = true;
}
/**
* @returns {Set<string>} types available (do not mutate)
*/
getSourceTypes() {
return TYPES;
}
/**
* Assuming this module is in the cache. Update the (cached) module with
* the fresh module from the factory. Usually updates internal references
* and properties.
* @param {Module} module fresh module
* @returns {void}
*/
updateCacheModule(module) {
const m = /** @type {ContextModule} */ (module);
this.resolveDependencies = m.resolveDependencies;
this.options = m.options;
}
/**
* Assuming this module is in the cache. Remove internal references to allow freeing some memory.
*/
cleanupForCache() {
super.cleanupForCache();
this.resolveDependencies = undefined;
}
_prettyRegExp(regexString, stripSlash = true) {
const str = (regexString + "").replace(/!/g, "%21").replace(/\|/g, "%7C");
return stripSlash ? str.substring(1, str.length - 1) : str;
}
_createIdentifier() {
let identifier =
this.context ||
(typeof this.options.resource === "string" ||
this.options.resource === false
? `${this.options.resource}`
: this.options.resource.join("|"));
if (this.options.resourceQuery) {
identifier += `|${this.options.resourceQuery}`;
}
if (this.options.resourceFragment) {
identifier += `|${this.options.resourceFragment}`;
}
if (this.options.mode) {
identifier += `|${this.options.mode}`;
}
if (!this.options.recursive) {
identifier += "|nonrecursive";
}
if (this.options.addon) {
identifier += `|${this.options.addon}`;
}
if (this.options.regExp) {
identifier += `|${this._prettyRegExp(this.options.regExp, false)}`;
}
if (this.options.include) {
identifier += `|include: ${this._prettyRegExp(
this.options.include,
false
)}`;
}
if (this.options.exclude) {
identifier += `|exclude: ${this._prettyRegExp(
this.options.exclude,
false
)}`;
}
if (this.options.referencedExports) {
identifier += `|referencedExports: ${JSON.stringify(
this.options.referencedExports
)}`;
}
if (this.options.chunkName) {
identifier += `|chunkName: ${this.options.chunkName}`;
}
if (this.options.groupOptions) {
identifier += `|groupOptions: ${JSON.stringify(
this.options.groupOptions
)}`;
}
if (this.options.namespaceObject === "strict") {
identifier += "|strict namespace object";
} else if (this.options.namespaceObject) {
identifier += "|namespace object";
}
return identifier;
}
/**
* @returns {string} a unique identifier of the module
*/
identifier() {
return this._identifier;
}
/**
* @param {RequestShortener} requestShortener the request shortener
* @returns {string} a user readable identifier of the module
*/
readableIdentifier(requestShortener) {
let identifier;
if (this.context) {
identifier = requestShortener.shorten(this.context) + "/";
} else if (
typeof this.options.resource === "string" ||
this.options.resource === false
) {
identifier = requestShortener.shorten(`${this.options.resource}`) + "/";
} else {
identifier = this.options.resource
.map(r => requestShortener.shorten(r) + "/")
.join(" ");
}
if (this.options.resourceQuery) {
identifier += ` ${this.options.resourceQuery}`;
}
if (this.options.mode) {
identifier += ` ${this.options.mode}`;
}
if (!this.options.recursive) {
identifier += " nonrecursive";
}
if (this.options.addon) {
identifier += ` ${requestShortener.shorten(this.options.addon)}`;
}
if (this.options.regExp) {
identifier += ` ${this._prettyRegExp(this.options.regExp)}`;
}
if (this.options.include) {
identifier += ` include: ${this._prettyRegExp(this.options.include)}`;
}
if (this.options.exclude) {
identifier += ` exclude: ${this._prettyRegExp(this.options.exclude)}`;
}
if (this.options.referencedExports) {
identifier += ` referencedExports: ${this.options.referencedExports
.map(e => e.join("."))
.join(", ")}`;
}
if (this.options.chunkName) {
identifier += ` chunkName: ${this.options.chunkName}`;
}
if (this.options.groupOptions) {
const groupOptions = this.options.groupOptions;
for (const key of Object.keys(groupOptions)) {
identifier += ` ${key}: ${groupOptions[key]}`;
}
}
if (this.options.namespaceObject === "strict") {
identifier += " strict namespace object";
} else if (this.options.namespaceObject) {
identifier += " namespace object";
}
return identifier;
}
/**
* @param {LibIdentOptions} options options
* @returns {string | null} an identifier for library inclusion
*/
libIdent(options) {
let identifier;
if (this.context) {
identifier = contextify(
options.context,
this.context,
options.associatedObjectForCache
);
} else if (typeof this.options.resource === "string") {
identifier = contextify(
options.context,
this.options.resource,
options.associatedObjectForCache
);
} else if (this.options.resource === false) {
identifier = "false";
} else {
const arr = [];
for (const res of this.options.resource) {
arr.push(
contextify(options.context, res, options.associatedObjectForCache)
);
}
identifier = arr.join(" ");
}
if (this.layer) identifier = `(${this.layer})/${identifier}`;
if (this.options.mode) {
identifier += ` ${this.options.mode}`;
}
if (this.options.recursive) {
identifier += " recursive";
}
if (this.options.addon) {
identifier += ` ${contextify(
options.context,
this.options.addon,
options.associatedObjectForCache
)}`;
}
if (this.options.regExp) {
identifier += ` ${this._prettyRegExp(this.options.regExp)}`;
}
if (this.options.include) {
identifier += ` include: ${this._prettyRegExp(this.options.include)}`;
}
if (this.options.exclude) {
identifier += ` exclude: ${this._prettyRegExp(this.options.exclude)}`;
}
if (this.options.referencedExports) {
identifier += ` referencedExports: ${this.options.referencedExports
.map(e => e.join("."))
.join(", ")}`;
}
return identifier;
}
/**
* @returns {void}
*/
invalidateBuild() {
this._forceBuild = true;
}
/**
* @param {NeedBuildContext} context context info
* @param {function((WebpackError | null)=, boolean=): void} callback callback function, returns true, if the module needs a rebuild
* @returns {void}
*/
needBuild({ fileSystemInfo }, callback) {
// build if enforced
if (this._forceBuild) return callback(null, true);
// always build when we have no snapshot and context
if (!this.buildInfo.snapshot)
return callback(null, Boolean(this.context || this.options.resource));
fileSystemInfo.checkSnapshotValid(this.buildInfo.snapshot, (err, valid) => {
callback(err, !valid);
});
}
/**
* @param {WebpackOptions} options webpack options
* @param {Compilation} compilation the compilation
* @param {ResolverWithOptions} resolver the resolver
* @param {InputFileSystem} fs the file system
* @param {function(WebpackError=): void} callback callback function
* @returns {void}
*/
build(options, compilation, resolver, fs, callback) {
this._forceBuild = false;
/** @type {BuildMeta} */
this.buildMeta = {
exportsType: "default",
defaultObject: "redirect-warn"
};
this.buildInfo = {
snapshot: undefined
};
this.dependencies.length = 0;
this.blocks.length = 0;
const startTime = Date.now();
this.resolveDependencies(fs, this.options, (err, dependencies) => {
if (err) {
return callback(
makeWebpackError(err, "ContextModule.resolveDependencies")
);
}
// abort if something failed
// this will create an empty context
if (!dependencies) {
callback();
return;
}
// enhance dependencies with meta info
for (const dep of dependencies) {
dep.loc = {
name: dep.userRequest
};
dep.request = this.options.addon + dep.request;
}
dependencies.sort(
concatComparators(
compareSelect(a => a.loc, compareLocations),
keepOriginalOrder(this.dependencies)
)
);
if (this.options.mode === "sync" || this.options.mode === "eager") {
// if we have an sync or eager context
// just add all dependencies and continue
this.dependencies = dependencies;
} else if (this.options.mode === "lazy-once") {
// for the lazy-once mode create a new async dependency block
// and add that block to this context
if (dependencies.length > 0) {
const block = new AsyncDependenciesBlock({
...this.options.groupOptions,
name: this.options.chunkName
});
for (const dep of dependencies) {
block.addDependency(dep);
}
this.addBlock(block);
}
} else if (
this.options.mode === "weak" ||
this.options.mode === "async-weak"
) {
// we mark all dependencies as weak
for (const dep of dependencies) {
dep.weak = true;
}
this.dependencies = dependencies;
} else if (this.options.mode === "lazy") {
// if we are lazy create a new async dependency block per dependency
// and add all blocks to this context
let index = 0;
for (const dep of dependencies) {
let chunkName = this.options.chunkName;
if (chunkName) {
if (!/\[(index|request)\]/.test(chunkName)) {
chunkName += "[index]";
}
chunkName = chunkName.replace(/\[index\]/g, `${index++}`);
chunkName = chunkName.replace(
/\[request\]/g,
Template.toPath(dep.userRequest)
);
}
const block = new AsyncDependenciesBlock(
{
...this.options.groupOptions,
name: chunkName
},
dep.loc,
dep.userRequest
);
block.addDependency(dep);
this.addBlock(block);
}
} else {
callback(
new WebpackError(`Unsupported mode "${this.options.mode}" in context`)
);
return;
}
if (!this.context && !this.options.resource) return callback();
compilation.fileSystemInfo.createSnapshot(
startTime,
null,
this.context
? [this.context]
: typeof this.options.resource === "string"
? [this.options.resource]
: /** @type {string[]} */ (this.options.resource),
null,
SNAPSHOT_OPTIONS,
(err, snapshot) => {
if (err) return callback(err);
this.buildInfo.snapshot = snapshot;
callback();
}
);
});
}
/**
* @param {LazySet<string>} fileDependencies set where file dependencies are added to
* @param {LazySet<string>} contextDependencies set where context dependencies are added to
* @param {LazySet<string>} missingDependencies set where missing dependencies are added to
* @param {LazySet<string>} buildDependencies set where build dependencies are added to
*/
addCacheDependencies(
fileDependencies,
contextDependencies,
missingDependencies,
buildDependencies
) {
if (this.context) {
contextDependencies.add(this.context);
} else if (typeof this.options.resource === "string") {
contextDependencies.add(this.options.resource);
} else if (this.options.resource === false) {
return;
} else {
for (const res of this.options.resource) contextDependencies.add(res);
}
}
/**
* @param {ContextElementDependency[]} dependencies all dependencies
* @param {ChunkGraph} chunkGraph chunk graph
* @returns {TODO} TODO
*/
getUserRequestMap(dependencies, chunkGraph) {
const moduleGraph = chunkGraph.moduleGraph;
// if we filter first we get a new array
// therefore we don't need to create a clone of dependencies explicitly
// therefore the order of this is !important!
const sortedDependencies = dependencies
.filter(dependency => moduleGraph.getModule(dependency))
.sort((a, b) => {
if (a.userRequest === b.userRequest) {
return 0;
}
return a.userRequest < b.userRequest ? -1 : 1;
});
const map = Object.create(null);
for (const dep of sortedDependencies) {
const module = moduleGraph.getModule(dep);
map[dep.userRequest] = chunkGraph.getModuleId(module);
}
return map;
}
/**
* @param {ContextElementDependency[]} dependencies all dependencies
* @param {ChunkGraph} chunkGraph chunk graph
* @returns {TODO} TODO
*/
getFakeMap(dependencies, chunkGraph) {
if (!this.options.namespaceObject) {
return 9;
}
const moduleGraph = chunkGraph.moduleGraph;
// bitfield
let hasType = 0;
const comparator = compareModulesById(chunkGraph);
// if we filter first we get a new array
// therefore we don't need to create a clone of dependencies explicitly
// therefore the order of this is !important!
const sortedModules = dependencies
.map(dependency => moduleGraph.getModule(dependency))
.filter(Boolean)
.sort(comparator);
const fakeMap = Object.create(null);
for (const module of sortedModules) {
const exportsType = module.getExportsType(
moduleGraph,
this.options.namespaceObject === "strict"
);
const id = chunkGraph.getModuleId(module);
switch (exportsType) {
case "namespace":
fakeMap[id] = 9;
hasType |= 1;
break;
case "dynamic":
fakeMap[id] = 7;
hasType |= 2;
break;
case "default-only":
fakeMap[id] = 1;
hasType |= 4;
break;
case "default-with-named":
fakeMap[id] = 3;
hasType |= 8;
break;
default:
throw new Error(`Unexpected exports type ${exportsType}`);
}
}
if (hasType === 1) {
return 9;
}
if (hasType === 2) {
return 7;
}
if (hasType === 4) {
return 1;
}
if (hasType === 8) {
return 3;
}
if (hasType === 0) {
return 9;
}
return fakeMap;
}
getFakeMapInitStatement(fakeMap) {
return typeof fakeMap === "object"
? `var fakeMap = ${JSON.stringify(fakeMap, null, "\t")};`
: "";
}
getReturn(type, asyncModule) {
if (type === 9) {
return "__webpack_require__(id)";
}
return `${RuntimeGlobals.createFakeNamespaceObject}(id, ${type}${
asyncModule ? " | 16" : ""
})`;
}
getReturnModuleObjectSource(
fakeMap,
asyncModule,
fakeMapDataExpression = "fakeMap[id]"
) {
if (typeof fakeMap === "number") {
return `return ${this.getReturn(fakeMap, asyncModule)};`;
}
return `return ${
RuntimeGlobals.createFakeNamespaceObject
}(id, ${fakeMapDataExpression}${asyncModule ? " | 16" : ""})`;
}
/**
* @param {TODO} dependencies TODO
* @param {TODO} id TODO
* @param {ChunkGraph} chunkGraph the chunk graph
* @returns {string} source code
*/
getSyncSource(dependencies, id, chunkGraph) {
const map = this.getUserRequestMap(dependencies, chunkGraph);
const fakeMap = this.getFakeMap(dependencies, chunkGraph);
const returnModuleObject = this.getReturnModuleObjectSource(fakeMap);
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackContext(req) {
var id = webpackContextResolve(req);
${returnModuleObject}
}
function webpackContextResolve(req) {
if(!${RuntimeGlobals.hasOwnProperty}(map, req)) {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return map[req];
}
webpackContext.keys = function webpackContextKeys() {
return Object.keys(map);
};
webpackContext.resolve = webpackContextResolve;
module.exports = webpackContext;
webpackContext.id = ${JSON.stringify(id)};`;
}
/**
* @param {TODO} dependencies TODO
* @param {TODO} id TODO
* @param {ChunkGraph} chunkGraph the chunk graph
* @returns {string} source code
*/
getWeakSyncSource(dependencies, id, chunkGraph) {
const map = this.getUserRequestMap(dependencies, chunkGraph);
const fakeMap = this.getFakeMap(dependencies, chunkGraph);
const returnModuleObject = this.getReturnModuleObjectSource(fakeMap);
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackContext(req) {
var id = webpackContextResolve(req);
if(!${RuntimeGlobals.moduleFactories}[id]) {
var e = new Error("Module '" + req + "' ('" + id + "') is not available (weak dependency)");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
${returnModuleObject}
}
function webpackContextResolve(req) {
if(!${RuntimeGlobals.hasOwnProperty}(map, req)) {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return map[req];
}
webpackContext.keys = function webpackContextKeys() {
return Object.keys(map);
};
webpackContext.resolve = webpackContextResolve;
webpackContext.id = ${JSON.stringify(id)};
module.exports = webpackContext;`;
}
/**
* @param {TODO} dependencies TODO
* @param {TODO} id TODO
* @param {Object} context context
* @param {ChunkGraph} context.chunkGraph the chunk graph
* @param {RuntimeTemplate} context.runtimeTemplate the chunk graph
* @returns {string} source code
*/
getAsyncWeakSource(dependencies, id, { chunkGraph, runtimeTemplate }) {
const arrow = runtimeTemplate.supportsArrowFunction();
const map = this.getUserRequestMap(dependencies, chunkGraph);
const fakeMap = this.getFakeMap(dependencies, chunkGraph);
const returnModuleObject = this.getReturnModuleObjectSource(fakeMap, true);
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackAsyncContext(req) {
return webpackAsyncContextResolve(req).then(${
arrow ? "id =>" : "function(id)"
} {
if(!${RuntimeGlobals.moduleFactories}[id]) {
var e = new Error("Module '" + req + "' ('" + id + "') is not available (weak dependency)");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
${returnModuleObject}
});
}
function webpackAsyncContextResolve(req) {
// Here Promise.resolve().then() is used instead of new Promise() to prevent
// uncaught exception popping up in devtools
return Promise.resolve().then(${arrow ? "() =>" : "function()"} {
if(!${RuntimeGlobals.hasOwnProperty}(map, req)) {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return map[req];
});
}
webpackAsyncContext.keys = ${runtimeTemplate.returningFunction(
"Object.keys(map)"
)};
webpackAsyncContext.resolve = webpackAsyncContextResolve;
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
/**
* @param {TODO} dependencies TODO
* @param {TODO} id TODO
* @param {Object} context context
* @param {ChunkGraph} context.chunkGraph the chunk graph
* @param {RuntimeTemplate} context.runtimeTemplate the chunk graph
* @returns {string} source code
*/
getEagerSource(dependencies, id, { chunkGraph, runtimeTemplate }) {
const arrow = runtimeTemplate.supportsArrowFunction();
const map = this.getUserRequestMap(dependencies, chunkGraph);
const fakeMap = this.getFakeMap(dependencies, chunkGraph);
const thenFunction =
fakeMap !== 9
? `${arrow ? "id =>" : "function(id)"} {
${this.getReturnModuleObjectSource(fakeMap)}
}`
: "__webpack_require__";
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackAsyncContext(req) {
return webpackAsyncContextResolve(req).then(${thenFunction});
}
function webpackAsyncContextResolve(req) {
// Here Promise.resolve().then() is used instead of new Promise() to prevent
// uncaught exception popping up in devtools
return Promise.resolve().then(${arrow ? "() =>" : "function()"} {
if(!${RuntimeGlobals.hasOwnProperty}(map, req)) {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return map[req];
});
}
webpackAsyncContext.keys = ${runtimeTemplate.returningFunction(
"Object.keys(map)"
)};
webpackAsyncContext.resolve = webpackAsyncContextResolve;
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
/**
* @param {TODO} block TODO
* @param {TODO} dependencies TODO
* @param {TODO} id TODO
* @param {Object} options options object
* @param {RuntimeTemplate} options.runtimeTemplate the runtime template
* @param {ChunkGraph} options.chunkGraph the chunk graph
* @returns {string} source code
*/
getLazyOnceSource(block, dependencies, id, { runtimeTemplate, chunkGraph }) {
const promise = runtimeTemplate.blockPromise({
chunkGraph,
block,
message: "lazy-once context",
runtimeRequirements: new Set()
});
const arrow = runtimeTemplate.supportsArrowFunction();
const map = this.getUserRequestMap(dependencies, chunkGraph);
const fakeMap = this.getFakeMap(dependencies, chunkGraph);
const thenFunction =
fakeMap !== 9
? `${arrow ? "id =>" : "function(id)"} {
${this.getReturnModuleObjectSource(fakeMap, true)};
}`
: "__webpack_require__";
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackAsyncContext(req) {
return webpackAsyncContextResolve(req).then(${thenFunction});
}
function webpackAsyncContextResolve(req) {
return ${promise}.then(${arrow ? "() =>" : "function()"} {
if(!${RuntimeGlobals.hasOwnProperty}(map, req)) {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return map[req];
});
}
webpackAsyncContext.keys = ${runtimeTemplate.returningFunction(
"Object.keys(map)"
)};
webpackAsyncContext.resolve = webpackAsyncContextResolve;
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
/**
* @param {TODO} blocks TODO
* @param {TODO} id TODO
* @param {Object} context context
* @param {ChunkGraph} context.chunkGraph the chunk graph
* @param {RuntimeTemplate} context.runtimeTemplate the chunk graph
* @returns {string} source code
*/
getLazySource(blocks, id, { chunkGraph, runtimeTemplate }) {
const moduleGraph = chunkGraph.moduleGraph;
const arrow = runtimeTemplate.supportsArrowFunction();
let hasMultipleOrNoChunks = false;
let hasNoChunk = true;
const fakeMap = this.getFakeMap(
blocks.map(b => b.dependencies[0]),
chunkGraph
);
const hasFakeMap = typeof fakeMap === "object";
const items = blocks
.map(block => {
const dependency = block.dependencies[0];
return {
dependency: dependency,
module: moduleGraph.getModule(dependency),
block: block,
userRequest: dependency.userRequest,
chunks: undefined
};
})
.filter(item => item.module);
for (const item of items) {
const chunkGroup = chunkGraph.getBlockChunkGroup(item.block);
const chunks = (chunkGroup && chunkGroup.chunks) || [];
item.chunks = chunks;
if (chunks.length > 0) {
hasNoChunk = false;
}
if (chunks.length !== 1) {
hasMultipleOrNoChunks = true;
}
}
const shortMode = hasNoChunk && !hasFakeMap;
const sortedItems = items.sort((a, b) => {
if (a.userRequest === b.userRequest) return 0;
return a.userRequest < b.userRequest ? -1 : 1;
});
const map = Object.create(null);
for (const item of sortedItems) {
const moduleId = chunkGraph.getModuleId(item.module);
if (shortMode) {
map[item.userRequest] = moduleId;
} else {
const arrayStart = [moduleId];
if (hasFakeMap) {
arrayStart.push(fakeMap[moduleId]);
}
map[item.userRequest] = arrayStart.concat(
item.chunks.map(chunk => chunk.id)
);
}
}
const chunksStartPosition = hasFakeMap ? 2 : 1;
const requestPrefix = hasNoChunk
? "Promise.resolve()"
: hasMultipleOrNoChunks
? `Promise.all(ids.slice(${chunksStartPosition}).map(${RuntimeGlobals.ensureChunk}))`
: `${RuntimeGlobals.ensureChunk}(ids[${chunksStartPosition}])`;
const returnModuleObject = this.getReturnModuleObjectSource(
fakeMap,
true,
shortMode ? "invalid" : "ids[1]"
);
const webpackAsyncContext =
requestPrefix === "Promise.resolve()"
? `
function webpackAsyncContext(req) {
return Promise.resolve().then(${arrow ? "() =>" : "function()"} {
if(!${RuntimeGlobals.hasOwnProperty}(map, req)) {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
${shortMode ? "var id = map[req];" : "var ids = map[req], id = ids[0];"}
${returnModuleObject}
});
}`
: `function webpackAsyncContext(req) {
if(!${RuntimeGlobals.hasOwnProperty}(map, req)) {
return Promise.resolve().then(${arrow ? "() =>" : "function()"} {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
});
}
var ids = map[req], id = ids[0];
return ${requestPrefix}.then(${arrow ? "() =>" : "function()"} {
${returnModuleObject}
});
}`;
return `var map = ${JSON.stringify(map, null, "\t")};
${webpackAsyncContext}
webpackAsyncContext.keys = ${runtimeTemplate.returningFunction(
"Object.keys(map)"
)};
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
getSourceForEmptyContext(id, runtimeTemplate) {
return `function webpackEmptyContext(req) {
var e = new Error("Cannot find module '" + req + "'");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
webpackEmptyContext.keys = ${runtimeTemplate.returningFunction("[]")};
webpackEmptyContext.resolve = webpackEmptyContext;
webpackEmptyContext.id = ${JSON.stringify(id)};
module.exports = webpackEmptyContext;`;
}
getSourceForEmptyAsyncContext(id, runtimeTemplate) {
const arrow = runtimeTemplate.supportsArrowFunction();