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RemoteRuntimeModule.js
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Tue, Feb 4, 07:48

RemoteRuntimeModule.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
/** @typedef {import("./RemoteModule")} RemoteModule */
class RemoteRuntimeModule extends RuntimeModule {
constructor() {
super("remotes loading");
}
/**
* @returns {string} runtime code
*/
generate() {
const { runtimeTemplate, chunkGraph, moduleGraph } = this.compilation;
const chunkToRemotesMapping = {};
const idToExternalAndNameMapping = {};
for (const chunk of this.chunk.getAllAsyncChunks()) {
const modules = chunkGraph.getChunkModulesIterableBySourceType(
chunk,
"remote"
);
if (!modules) continue;
const remotes = (chunkToRemotesMapping[chunk.id] = []);
for (const m of modules) {
const module = /** @type {RemoteModule} */ (m);
const name = module.internalRequest;
const id = chunkGraph.getModuleId(module);
const shareScope = module.shareScope;
const dep = module.dependencies[0];
const externalModule = moduleGraph.getModule(dep);
const externalModuleId =
externalModule && chunkGraph.getModuleId(externalModule);
remotes.push(id);
idToExternalAndNameMapping[id] = [shareScope, name, externalModuleId];
}
}
return Template.asString([
`var chunkMapping = ${JSON.stringify(
chunkToRemotesMapping,
null,
"\t"
)};`,
`var idToExternalAndNameMapping = ${JSON.stringify(
idToExternalAndNameMapping,
null,
"\t"
)};`,
`${
RuntimeGlobals.ensureChunkHandlers
}.remotes = ${runtimeTemplate.basicFunction("chunkId, promises", [
`if(${RuntimeGlobals.hasOwnProperty}(chunkMapping, chunkId)) {`,
Template.indent([
`chunkMapping[chunkId].forEach(${runtimeTemplate.basicFunction("id", [
`var getScope = ${RuntimeGlobals.currentRemoteGetScope};`,
"if(!getScope) getScope = [];",
"var data = idToExternalAndNameMapping[id];",
"if(getScope.indexOf(data) >= 0) return;",
"getScope.push(data);",
`if(data.p) return promises.push(data.p);`,
`var onError = ${runtimeTemplate.basicFunction("error", [
'if(!error) error = new Error("Container missing");',
'if(typeof error.message === "string")',
Template.indent(
`error.message += '\\nwhile loading "' + data[1] + '" from ' + data[2];`
),
`__webpack_modules__[id] = ${runtimeTemplate.basicFunction("", [
"throw error;"
])}`,
"data.p = 0;"
])};`,
`var handleFunction = ${runtimeTemplate.basicFunction(
"fn, arg1, arg2, d, next, first",
[
"try {",
Template.indent([
"var promise = fn(arg1, arg2);",
"if(promise && promise.then) {",
Template.indent([
`var p = promise.then(${runtimeTemplate.returningFunction(
"next(result, d)",
"result"
)}, onError);`,
`if(first) promises.push(data.p = p); else return p;`
]),
"} else {",
Template.indent(["return next(promise, d, first);"]),
"}"
]),
"} catch(error) {",
Template.indent(["onError(error);"]),
"}"
]
)}`,
`var onExternal = ${runtimeTemplate.returningFunction(
`external ? handleFunction(${RuntimeGlobals.initializeSharing}, data[0], 0, external, onInitialized, first) : onError()`,
"external, _, first"
)};`,
`var onInitialized = ${runtimeTemplate.returningFunction(
`handleFunction(external.get, data[1], getScope, 0, onFactory, first)`,
"_, external, first"
)};`,
`var onFactory = ${runtimeTemplate.basicFunction("factory", [
"data.p = 1;",
`__webpack_modules__[id] = ${runtimeTemplate.basicFunction(
"module",
["module.exports = factory();"]
)}`
])};`,
"handleFunction(__webpack_require__, data[2], 0, 0, onExternal, 1);"
])});`
]),
"}"
])}`
]);
}
}
module.exports = RemoteRuntimeModule;

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