mirror of https://github.com/webpack/webpack.git
337 lines
9.2 KiB
JavaScript
337 lines
9.2 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const Template = require("./Template");
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/** @typedef {import("./Module")} Module */
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module.exports = class RuntimeTemplate {
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constructor(outputOptions, requestShortener) {
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this.outputOptions = outputOptions || {};
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this.requestShortener = requestShortener;
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}
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/**
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* Add a comment
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* @param {object} options Information content of the comment
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* @param {string=} options.request request string used originally
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* @param {string=} options.chunkName name of the chunk referenced
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* @param {string=} options.chunkReason reason information of the chunk
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* @param {string=} options.message additional message
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* @param {string=} options.exportName name of the export
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* @returns {string} comment
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*/
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comment({ request, chunkName, chunkReason, message, exportName }) {
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let content;
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if (this.outputOptions.pathinfo) {
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content = [message, request, chunkName, chunkReason]
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.filter(Boolean)
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.map(item => this.requestShortener.shorten(item))
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.join(" | ");
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} else {
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content = [message, chunkName, chunkReason]
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.filter(Boolean)
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.map(item => this.requestShortener.shorten(item))
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.join(" | ");
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}
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if (!content) return "";
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if (this.outputOptions.pathinfo) {
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return Template.toComment(content) + " ";
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} else {
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return Template.toNormalComment(content) + " ";
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}
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}
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throwMissingModuleErrorFunction({ request }) {
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const err = `Cannot find module '${request}'`;
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return `function webpackMissingModule() { var e = new Error(${JSON.stringify(
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err
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)}); e.code = 'MODULE_NOT_FOUND'; throw e; }`;
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}
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missingModule({ request }) {
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return `!(${this.throwMissingModuleErrorFunction({ request })}())`;
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}
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missingModuleStatement({ request }) {
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return `${this.missingModule({ request })};\n`;
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}
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missingModulePromise({ request }) {
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return `Promise.resolve().then(${this.throwMissingModuleErrorFunction({
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request
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})})`;
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}
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moduleId({ module, request }) {
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if (!module) {
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return this.missingModule({
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request
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});
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}
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if (module.id === null) {
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throw new Error(
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`RuntimeTemplate.moduleId(): Module ${module.identifier()} has no id. This should not happen.`
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);
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}
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return `${this.comment({ request })}${JSON.stringify(module.id)}`;
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}
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moduleRaw({ module, request }) {
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if (!module) {
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return this.missingModule({
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request
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});
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}
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return `__webpack_require__(${this.moduleId({ module, request })})`;
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}
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moduleExports({ module, request }) {
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return this.moduleRaw({
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module,
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request
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});
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}
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moduleNamespace({ module, request, strict }) {
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if (!module) {
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return this.missingModule({
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request
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});
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}
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const moduleId = this.moduleId({
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module,
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request
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});
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const exportsType = module.buildMeta && module.buildMeta.exportsType;
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if (exportsType === "namespace") {
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const rawModule = this.moduleRaw({
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module,
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request
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});
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return rawModule;
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} else if (exportsType === "named") {
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return `__webpack_require__.t(${moduleId}, 3)`;
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} else if (strict) {
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return `__webpack_require__.t(${moduleId}, 1)`;
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} else {
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return `__webpack_require__.t(${moduleId}, 7)`;
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}
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}
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moduleNamespacePromise({ block, module, request, message, strict, weak }) {
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if (!module) {
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return this.missingModulePromise({
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request
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});
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}
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if (module.id === null) {
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throw new Error(
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`RuntimeTemplate.moduleNamespacePromise(): Module ${module.identifier()} has no id. This should not happen.`
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);
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}
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const promise = this.blockPromise({
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block,
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message
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});
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let getModuleFunction;
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let idExpr = JSON.stringify(module.id);
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const comment = this.comment({
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request
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});
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let header = "";
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if (weak) {
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if (idExpr.length > 8) {
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// 'var x="nnnnnn";x,"+x+",x' vs '"nnnnnn",nnnnnn,"nnnnnn"'
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header += `var id = ${idExpr}; `;
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idExpr = "id";
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}
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header += `if(!__webpack_require__.m[${idExpr}]) { var e = new Error("Module '" + ${idExpr} + "' is not available (weak dependency)"); e.code = 'MODULE_NOT_FOUND'; throw e; } `;
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}
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const moduleId = this.moduleId({
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module,
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request
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});
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const exportsType = module.buildMeta && module.buildMeta.exportsType;
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if (exportsType === "namespace") {
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if (header) {
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const rawModule = this.moduleRaw({
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module,
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request
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});
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getModuleFunction = `function() { ${header}return ${rawModule}; }`;
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} else {
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getModuleFunction = `__webpack_require__.bind(null, ${comment}${idExpr})`;
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}
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} else if (exportsType === "named") {
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if (header) {
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getModuleFunction = `function() { ${header}return __webpack_require__.t(${moduleId}, 3); }`;
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} else {
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getModuleFunction = `__webpack_require__.t.bind(null, ${comment}${idExpr}, 3)`;
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}
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} else if (strict) {
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if (header) {
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getModuleFunction = `function() { ${header}return __webpack_require__.t(${moduleId}, 1); }`;
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} else {
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getModuleFunction = `__webpack_require__.t.bind(null, ${comment}${idExpr}, 1)`;
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}
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} else {
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if (header) {
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getModuleFunction = `function() { ${header}return __webpack_require__.t(${moduleId}, 7); }`;
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} else {
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getModuleFunction = `__webpack_require__.t.bind(null, ${comment}${idExpr}, 7)`;
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}
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}
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return `${promise || "Promise.resolve()"}.then(${getModuleFunction})`;
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}
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/**
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*
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* @param {Object} options options object
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* @param {boolean=} options.update whether a new variable should be created or the existing one updated
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* @param {Module} options.module the module
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* @param {string} options.request the request that should be printed as comment
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* @param {string} options.importVar name of the import variable
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* @param {Module} options.originModule module in which the statement is emitted
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* @returns {string} the import statement
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*/
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importStatement({ update, module, request, importVar, originModule }) {
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if (!module) {
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return this.missingModuleStatement({
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request
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});
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}
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const moduleId = this.moduleId({
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module,
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request
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});
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const optDeclaration = update ? "" : "var ";
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const exportsType = module.buildMeta && module.buildMeta.exportsType;
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let content = `/* harmony import */ ${optDeclaration}${importVar} = __webpack_require__(${moduleId});\n`;
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if (!exportsType && !originModule.buildMeta.strictHarmonyModule) {
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content += `/* harmony import */ ${optDeclaration}${importVar}_default = /*#__PURE__*/__webpack_require__.n(${importVar});\n`;
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}
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if (exportsType === "named") {
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if (Array.isArray(module.buildMeta.providedExports)) {
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content += `${optDeclaration}${importVar}_namespace = /*#__PURE__*/__webpack_require__.t(${moduleId}, 1);\n`;
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} else {
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content += `${optDeclaration}${importVar}_namespace = /*#__PURE__*/__webpack_require__.t(${moduleId});\n`;
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}
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}
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return content;
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}
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exportFromImport({
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module,
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request,
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exportName,
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originModule,
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asiSafe,
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isCall,
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callContext,
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importVar
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}) {
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if (!module) {
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return this.missingModule({
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request
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});
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}
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const exportsType = module.buildMeta && module.buildMeta.exportsType;
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if (!exportsType) {
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if (exportName === "default") {
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if (!originModule.buildMeta.strictHarmonyModule) {
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if (isCall) {
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return `${importVar}_default()`;
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} else if (asiSafe) {
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return `(${importVar}_default())`;
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} else {
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return `${importVar}_default.a`;
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}
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} else {
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return importVar;
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}
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} else if (originModule.buildMeta.strictHarmonyModule) {
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if (exportName) {
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return "/* non-default import from non-esm module */undefined";
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} else {
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return `/*#__PURE__*/__webpack_require__.t(${importVar})`;
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}
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}
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}
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if (exportsType === "named") {
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if (exportName === "default") {
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return importVar;
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} else if (!exportName) {
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return `${importVar}_namespace`;
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}
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}
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if (exportName) {
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const used = module.isUsed(exportName);
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if (!used) {
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const comment = Template.toNormalComment(`unused export ${exportName}`);
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return `${comment} undefined`;
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}
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const comment =
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used !== exportName ? Template.toNormalComment(exportName) + " " : "";
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const access = `${importVar}[${comment}${JSON.stringify(used)}]`;
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if (isCall) {
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if (callContext === false && asiSafe) {
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return `(0,${access})`;
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} else if (callContext === false) {
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return `Object(${access})`;
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}
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}
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return access;
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} else {
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return importVar;
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}
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}
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blockPromise({ block, message }) {
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if (!block || !block.chunkGroup || block.chunkGroup.chunks.length === 0) {
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const comment = this.comment({
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message
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});
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return `Promise.resolve(${comment.trim()})`;
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}
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const chunks = block.chunkGroup.chunks.filter(
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chunk => !chunk.hasRuntime() && chunk.id !== null
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);
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const comment = this.comment({
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message,
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chunkName: block.chunkName,
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chunkReason: block.chunkReason
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});
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if (chunks.length === 1) {
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const chunkId = JSON.stringify(chunks[0].id);
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return `__webpack_require__.e(${comment}${chunkId})`;
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} else if (chunks.length > 0) {
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const requireChunkId = chunk =>
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`__webpack_require__.e(${JSON.stringify(chunk.id)})`;
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return `Promise.all(${comment.trim()}[${chunks
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.map(requireChunkId)
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.join(", ")}])`;
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} else {
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return `Promise.resolve(${comment.trim()})`;
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}
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}
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onError() {
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return "__webpack_require__.oe";
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}
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defineEsModuleFlagStatement({ exportsArgument }) {
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return `__webpack_require__.r(${exportsArgument});\n`;
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}
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};
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