652 lines
16 KiB
JavaScript
652 lines
16 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 DependencyReference = require("./DependencyReference");
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const HarmonyImportDependency = require("./HarmonyImportDependency");
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const Template = require("../Template");
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const HarmonyLinkingError = require("../HarmonyLinkingError");
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/** @typedef {import("../Module")} Module */
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/** @typedef {"missing"|"unused"|"empty-star"|"reexport-non-harmony-default"|"reexport-named-default"|"reexport-namespace-object"|"reexport-non-harmony-default-strict"|"reexport-fake-namespace-object"|"rexport-non-harmony-undefined"|"safe-reexport"|"checked-reexport"|"dynamic-reexport"} ExportModeType */
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/** @type {Map<string, string>} */
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const EMPTY_MAP = new Map();
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class ExportMode {
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/**
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* @param {ExportModeType} type type of the mode
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*/
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constructor(type) {
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/** @type {ExportModeType} */
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this.type = type;
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/** @type {string|null} */
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this.name = null;
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/** @type {Map<string, string>} */
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this.map = EMPTY_MAP;
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/** @type {Module|null} */
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this.module = null;
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/** @type {string|null} */
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this.userRequest = null;
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}
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}
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const EMPTY_STAR_MODE = new ExportMode("empty-star");
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class HarmonyExportImportedSpecifierDependency extends HarmonyImportDependency {
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constructor(
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request,
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originModule,
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sourceOrder,
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parserScope,
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id,
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name,
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activeExports,
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otherStarExports,
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strictExportPresence
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) {
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super(request, originModule, sourceOrder, parserScope);
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this.id = id;
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this.redirectedId = undefined;
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this.name = name;
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this.activeExports = activeExports;
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this.otherStarExports = otherStarExports;
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this.strictExportPresence = strictExportPresence;
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}
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get type() {
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return "harmony export imported specifier";
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}
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get _id() {
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return this.redirectedId || this.id;
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}
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getMode(ignoreUnused) {
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const name = this.name;
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const id = this._id;
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const used = this.originModule.isUsed(name);
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const importedModule = this._module;
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if (!importedModule) {
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const mode = new ExportMode("missing");
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mode.userRequest = this.userRequest;
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return mode;
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}
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if (
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!ignoreUnused &&
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(name ? !used : this.originModule.usedExports === false)
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) {
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const mode = new ExportMode("unused");
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mode.name = name || "*";
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return mode;
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}
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const strictHarmonyModule = this.originModule.buildMeta.strictHarmonyModule;
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if (name && id === "default" && importedModule.buildMeta) {
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if (!importedModule.buildMeta.exportsType) {
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const mode = new ExportMode(
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strictHarmonyModule
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? "reexport-non-harmony-default-strict"
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: "reexport-non-harmony-default"
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);
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mode.name = name;
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mode.module = importedModule;
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return mode;
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} else if (importedModule.buildMeta.exportsType === "named") {
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const mode = new ExportMode("reexport-named-default");
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mode.name = name;
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mode.module = importedModule;
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return mode;
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}
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}
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const isNotAHarmonyModule =
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importedModule.buildMeta && !importedModule.buildMeta.exportsType;
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if (name) {
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let mode;
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if (id) {
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// export { name as name }
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if (isNotAHarmonyModule && strictHarmonyModule) {
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mode = new ExportMode("rexport-non-harmony-undefined");
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mode.name = name;
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} else {
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mode = new ExportMode("safe-reexport");
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mode.map = new Map([[name, id]]);
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}
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} else {
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// export { * as name }
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if (isNotAHarmonyModule && strictHarmonyModule) {
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mode = new ExportMode("reexport-fake-namespace-object");
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mode.name = name;
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} else {
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mode = new ExportMode("reexport-namespace-object");
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mode.name = name;
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}
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}
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mode.module = importedModule;
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return mode;
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}
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const hasUsedExports = Array.isArray(this.originModule.usedExports);
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const hasProvidedExports = Array.isArray(
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importedModule.buildMeta.providedExports
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);
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const activeFromOtherStarExports = this._discoverActiveExportsFromOtherStartExports();
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// export *
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if (hasUsedExports) {
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// reexport * with known used exports
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if (hasProvidedExports) {
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const map = new Map(
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this.originModule.usedExports
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.filter(id => {
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if (id === "default") return false;
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if (this.activeExports.has(id)) return false;
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if (activeFromOtherStarExports.has(id)) return false;
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if (!importedModule.buildMeta.providedExports.includes(id))
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return false;
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return true;
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})
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.map(item => [item, item])
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);
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if (map.size === 0) {
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return EMPTY_STAR_MODE;
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}
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const mode = new ExportMode("safe-reexport");
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mode.module = importedModule;
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mode.map = map;
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return mode;
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}
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const map = new Map(
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this.originModule.usedExports
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.filter(id => {
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if (id === "default") return false;
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if (this.activeExports.has(id)) return false;
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if (activeFromOtherStarExports.has(id)) return false;
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return true;
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})
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.map(item => [item, item])
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);
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if (map.size === 0) {
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return EMPTY_STAR_MODE;
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}
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const mode = new ExportMode("checked-reexport");
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mode.module = importedModule;
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mode.map = map;
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return mode;
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}
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if (hasProvidedExports) {
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const map = new Map(
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importedModule.buildMeta.providedExports
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.filter(id => {
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if (id === "default") return false;
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if (this.activeExports.has(id)) return false;
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if (activeFromOtherStarExports.has(id)) return false;
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return true;
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})
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.map(item => [item, item])
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);
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if (map.size === 0) {
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return EMPTY_STAR_MODE;
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}
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const mode = new ExportMode("safe-reexport");
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mode.module = importedModule;
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mode.map = map;
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return mode;
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}
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const mode = new ExportMode("dynamic-reexport");
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mode.module = importedModule;
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return mode;
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}
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getReference() {
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const mode = this.getMode(false);
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switch (mode.type) {
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case "missing":
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case "unused":
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case "empty-star":
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return null;
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case "reexport-non-harmony-default":
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case "reexport-named-default":
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return new DependencyReference(
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mode.module,
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["default"],
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false,
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this.sourceOrder
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);
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case "reexport-namespace-object":
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case "reexport-non-harmony-default-strict":
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case "reexport-fake-namespace-object":
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case "rexport-non-harmony-undefined":
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return new DependencyReference(
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mode.module,
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true,
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false,
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this.sourceOrder
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);
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case "safe-reexport":
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case "checked-reexport":
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return new DependencyReference(
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mode.module,
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Array.from(mode.map.values()),
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false,
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this.sourceOrder
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);
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case "dynamic-reexport":
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return new DependencyReference(
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mode.module,
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true,
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false,
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this.sourceOrder
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);
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default:
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throw new Error(`Unknown mode ${mode.type}`);
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}
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}
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_discoverActiveExportsFromOtherStartExports() {
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if (!this.otherStarExports) return new Set();
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const result = new Set();
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// try to learn impossible exports from other star exports with provided exports
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for (const otherStarExport of this.otherStarExports) {
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const otherImportedModule = otherStarExport._module;
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if (
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otherImportedModule &&
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Array.isArray(otherImportedModule.buildMeta.providedExports)
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) {
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for (const exportName of otherImportedModule.buildMeta
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.providedExports) {
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result.add(exportName);
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}
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}
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}
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return result;
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}
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getExports() {
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if (this.name) {
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return {
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exports: [this.name],
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dependencies: undefined
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};
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}
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const importedModule = this._module;
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if (!importedModule) {
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// no imported module available
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return {
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exports: null,
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dependencies: undefined
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};
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}
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if (Array.isArray(importedModule.buildMeta.providedExports)) {
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return {
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exports: importedModule.buildMeta.providedExports.filter(
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id => id !== "default"
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),
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dependencies: [importedModule]
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};
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}
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if (importedModule.buildMeta.providedExports) {
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return {
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exports: true,
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dependencies: undefined
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};
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}
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return {
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exports: null,
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dependencies: [importedModule]
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};
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}
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getWarnings() {
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if (
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this.strictExportPresence ||
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this.originModule.buildMeta.strictHarmonyModule
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) {
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return [];
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}
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return this._getErrors();
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}
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getErrors() {
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if (
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this.strictExportPresence ||
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this.originModule.buildMeta.strictHarmonyModule
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) {
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return this._getErrors();
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}
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return [];
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}
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_getErrors() {
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const importedModule = this._module;
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if (!importedModule) {
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return;
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}
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if (!importedModule.buildMeta || !importedModule.buildMeta.exportsType) {
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// It's not an harmony module
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if (
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this.originModule.buildMeta.strictHarmonyModule &&
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this._id &&
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this._id !== "default"
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) {
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// In strict harmony modules we only support the default export
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return [
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new HarmonyLinkingError(
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`Can't reexport the named export '${this._id}' from non EcmaScript module (only default export is available)`
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)
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];
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}
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return;
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}
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if (!this._id) {
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return;
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}
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if (importedModule.isProvided(this._id) !== false) {
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// It's provided or we are not sure
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return;
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}
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// We are sure that it's not provided
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const idIsNotNameMessage =
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this._id !== this.name ? ` (reexported as '${this.name}')` : "";
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const errorMessage = `"export '${this._id}'${idIsNotNameMessage} was not found in '${this.userRequest}'`;
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return [new HarmonyLinkingError(errorMessage)];
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}
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updateHash(hash) {
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super.updateHash(hash);
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const hashValue = this.getHashValue(this._module);
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hash.update(hashValue);
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}
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getHashValue(importedModule) {
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if (!importedModule) {
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return "";
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}
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const stringifiedUsedExport = JSON.stringify(importedModule.usedExports);
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const stringifiedProvidedExport = JSON.stringify(
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importedModule.buildMeta.providedExports
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);
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return (
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importedModule.used + stringifiedUsedExport + stringifiedProvidedExport
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);
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}
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disconnect() {
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super.disconnect();
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this.redirectedId = undefined;
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}
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}
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module.exports = HarmonyExportImportedSpecifierDependency;
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HarmonyExportImportedSpecifierDependency.Template = class HarmonyExportImportedSpecifierDependencyTemplate extends HarmonyImportDependency.Template {
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harmonyInit(dep, source, runtime, dependencyTemplates) {
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super.harmonyInit(dep, source, runtime, dependencyTemplates);
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const content = this.getContent(dep);
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source.insert(-1, content);
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}
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getHarmonyInitOrder(dep) {
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if (dep.name) {
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const used = dep.originModule.isUsed(dep.name);
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if (!used) return NaN;
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} else {
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const importedModule = dep._module;
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const activeFromOtherStarExports = dep._discoverActiveExportsFromOtherStartExports();
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if (Array.isArray(dep.originModule.usedExports)) {
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// we know which exports are used
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const unused = dep.originModule.usedExports.every(id => {
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if (id === "default") return true;
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if (dep.activeExports.has(id)) return true;
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if (importedModule.isProvided(id) === false) return true;
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if (activeFromOtherStarExports.has(id)) return true;
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return false;
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});
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if (unused) return NaN;
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} else if (
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dep.originModule.usedExports &&
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importedModule &&
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Array.isArray(importedModule.buildMeta.providedExports)
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) {
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// not sure which exports are used, but we know which are provided
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const unused = importedModule.buildMeta.providedExports.every(id => {
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if (id === "default") return true;
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if (dep.activeExports.has(id)) return true;
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if (activeFromOtherStarExports.has(id)) return true;
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return false;
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});
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if (unused) return NaN;
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}
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}
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return super.getHarmonyInitOrder(dep);
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}
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getContent(dep) {
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const mode = dep.getMode(false);
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const module = dep.originModule;
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const importedModule = dep._module;
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const importVar = dep.getImportVar();
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switch (mode.type) {
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case "missing":
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return `throw new Error(${JSON.stringify(
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`Cannot find module '${mode.userRequest}'`
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)});\n`;
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case "unused":
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return `${Template.toNormalComment(
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`unused harmony reexport ${mode.name}`
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)}\n`;
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case "reexport-non-harmony-default":
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return (
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"/* harmony reexport (default from non-harmony) */ " +
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this.getReexportStatement(
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module,
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module.isUsed(mode.name),
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importVar,
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null
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)
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);
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case "reexport-named-default":
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return (
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"/* harmony reexport (default from named exports) */ " +
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this.getReexportStatement(
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module,
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module.isUsed(mode.name),
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importVar,
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""
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)
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);
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case "reexport-fake-namespace-object":
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return (
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"/* harmony reexport (fake namespace object from non-harmony) */ " +
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this.getReexportFakeNamespaceObjectStatement(
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module,
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module.isUsed(mode.name),
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importVar
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)
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);
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case "rexport-non-harmony-undefined":
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return (
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"/* harmony reexport (non default export from non-harmony) */ " +
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this.getReexportStatement(
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module,
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module.isUsed(mode.name),
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"undefined",
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""
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)
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);
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case "reexport-non-harmony-default-strict":
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return (
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"/* harmony reexport (default from non-harmony) */ " +
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this.getReexportStatement(
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module,
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module.isUsed(mode.name),
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importVar,
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""
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)
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);
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case "reexport-namespace-object":
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return (
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"/* harmony reexport (module object) */ " +
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this.getReexportStatement(
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module,
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module.isUsed(mode.name),
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importVar,
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""
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)
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);
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case "empty-star":
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return "/* empty/unused harmony star reexport */";
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case "safe-reexport":
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return Array.from(mode.map.entries())
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.map(item => {
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return (
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"/* harmony reexport (safe) */ " +
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this.getReexportStatement(
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module,
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module.isUsed(item[0]),
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importVar,
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importedModule.isUsed(item[1])
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) +
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"\n"
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);
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})
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.join("");
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|
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case "checked-reexport":
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return Array.from(mode.map.entries())
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.map(item => {
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return (
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"/* harmony reexport (checked) */ " +
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this.getConditionalReexportStatement(
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module,
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item[0],
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importVar,
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item[1]
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) +
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"\n"
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);
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})
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.join("");
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case "dynamic-reexport": {
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const activeExports = new Set([
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...dep.activeExports,
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...dep._discoverActiveExportsFromOtherStartExports()
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]);
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let content =
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"/* harmony reexport (unknown) */ for(var __WEBPACK_IMPORT_KEY__ in " +
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importVar +
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") ";
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// Filter out exports which are defined by other exports
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// and filter out default export because it cannot be reexported with *
|
|
if (activeExports.size > 0) {
|
|
content +=
|
|
"if(" +
|
|
JSON.stringify(Array.from(activeExports).concat("default")) +
|
|
".indexOf(__WEBPACK_IMPORT_KEY__) < 0) ";
|
|
} else {
|
|
content += "if(__WEBPACK_IMPORT_KEY__ !== 'default') ";
|
|
}
|
|
const exportsName = dep.originModule.exportsArgument;
|
|
return (
|
|
content +
|
|
`(function(key) { __webpack_require__.d(${exportsName}, key, function() { return ${importVar}[key]; }) }(__WEBPACK_IMPORT_KEY__));\n`
|
|
);
|
|
}
|
|
|
|
default:
|
|
throw new Error(`Unknown mode ${mode.type}`);
|
|
}
|
|
}
|
|
|
|
getReexportStatement(module, key, name, valueKey) {
|
|
const exportsName = module.exportsArgument;
|
|
const returnValue = this.getReturnValue(name, valueKey);
|
|
return `__webpack_require__.d(${exportsName}, ${JSON.stringify(
|
|
key
|
|
)}, function() { return ${returnValue}; });\n`;
|
|
}
|
|
|
|
getReexportFakeNamespaceObjectStatement(module, key, name) {
|
|
const exportsName = module.exportsArgument;
|
|
return `__webpack_require__.d(${exportsName}, ${JSON.stringify(
|
|
key
|
|
)}, function() { return __webpack_require__.t(${name}); });\n`;
|
|
}
|
|
|
|
getConditionalReexportStatement(module, key, name, valueKey) {
|
|
if (valueKey === false) {
|
|
return "/* unused export */\n";
|
|
}
|
|
const exportsName = module.exportsArgument;
|
|
const returnValue = this.getReturnValue(name, valueKey);
|
|
return `if(__webpack_require__.o(${name}, ${JSON.stringify(
|
|
valueKey
|
|
)})) __webpack_require__.d(${exportsName}, ${JSON.stringify(
|
|
key
|
|
)}, function() { return ${returnValue}; });\n`;
|
|
}
|
|
|
|
getReturnValue(name, valueKey) {
|
|
if (valueKey === null) {
|
|
return `${name}_default.a`;
|
|
}
|
|
if (valueKey === "") {
|
|
return name;
|
|
}
|
|
if (valueKey === false) {
|
|
return "/* unused export */ undefined";
|
|
}
|
|
|
|
return `${name}[${JSON.stringify(valueKey)}]`;
|
|
}
|
|
};
|