diff options
Diffstat (limited to 'node_modules/webpack/lib/dependencies/CommonJsExportRequireDependency.js')
| -rw-r--r-- | node_modules/webpack/lib/dependencies/CommonJsExportRequireDependency.js | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/dependencies/CommonJsExportRequireDependency.js b/node_modules/webpack/lib/dependencies/CommonJsExportRequireDependency.js new file mode 100644 index 00000000..d4f7a73c --- /dev/null +++ b/node_modules/webpack/lib/dependencies/CommonJsExportRequireDependency.js @@ -0,0 +1,404 @@ +/* + MIT License http://www.opensource.org/licenses/mit-license.php + Author Tobias Koppers @sokra +*/ + +"use strict"; + +const Dependency = require("../Dependency"); +const { UsageState } = require("../ExportsInfo"); +const Template = require("../Template"); +const { equals } = require("../util/ArrayHelpers"); +const makeSerializable = require("../util/makeSerializable"); +const propertyAccess = require("../util/propertyAccess"); +const { handleDependencyBase } = require("./CommonJsDependencyHelpers"); +const ModuleDependency = require("./ModuleDependency"); +const processExportInfo = require("./processExportInfo"); + +/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */ +/** @typedef {import("../Dependency").ExportsSpec} ExportsSpec */ +/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */ +/** @typedef {import("../Dependency").TRANSITIVE} TRANSITIVE */ +/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */ +/** @typedef {import("../ExportsInfo")} ExportsInfo */ +/** @typedef {import("../ExportsInfo").ExportInfo} ExportInfo */ +/** @typedef {import("../Module")} Module */ +/** @typedef {import("../ModuleGraph")} ModuleGraph */ +/** @typedef {import("../javascript/JavascriptParser").Range} Range */ +/** @typedef {import("../serialization/ObjectMiddleware").ObjectDeserializerContext} ObjectDeserializerContext */ +/** @typedef {import("../serialization/ObjectMiddleware").ObjectSerializerContext} ObjectSerializerContext */ +/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */ +/** @typedef {import("./CommonJsDependencyHelpers").CommonJSDependencyBaseKeywords} CommonJSDependencyBaseKeywords */ + +const idsSymbol = Symbol("CommonJsExportRequireDependency.ids"); + +const EMPTY_OBJECT = {}; + +class CommonJsExportRequireDependency extends ModuleDependency { + /** + * @param {Range} range range + * @param {Range | null} valueRange value range + * @param {CommonJSDependencyBaseKeywords} base base + * @param {string[]} names names + * @param {string} request request + * @param {string[]} ids ids + * @param {boolean} resultUsed true, when the result is used + */ + constructor(range, valueRange, base, names, request, ids, resultUsed) { + super(request); + this.range = range; + this.valueRange = valueRange; + this.base = base; + this.names = names; + this.ids = ids; + this.resultUsed = resultUsed; + this.asiSafe = undefined; + } + + get type() { + return "cjs export require"; + } + + /** + * @returns {boolean | TRANSITIVE} true, when changes to the referenced module could affect the referencing module; TRANSITIVE, when changes to the referenced module could affect referencing modules of the referencing module + */ + couldAffectReferencingModule() { + return Dependency.TRANSITIVE; + } + + /** + * @param {ModuleGraph} moduleGraph the module graph + * @returns {string[]} the imported id + */ + getIds(moduleGraph) { + return ( + /** @type {TODO} */ (moduleGraph.getMeta(this))[idsSymbol] || this.ids + ); + } + + /** + * @param {ModuleGraph} moduleGraph the module graph + * @param {string[]} ids the imported ids + * @returns {void} + */ + setIds(moduleGraph, ids) { + /** @type {TODO} */ (moduleGraph.getMeta(this))[idsSymbol] = ids; + } + + /** + * Returns list of exports referenced by this dependency + * @param {ModuleGraph} moduleGraph module graph + * @param {RuntimeSpec} runtime the runtime for which the module is analysed + * @returns {(string[] | ReferencedExport)[]} referenced exports + */ + getReferencedExports(moduleGraph, runtime) { + const ids = this.getIds(moduleGraph); + const getFullResult = () => { + if (ids.length === 0) { + return Dependency.EXPORTS_OBJECT_REFERENCED; + } + return [ + { + name: ids, + canMangle: false + } + ]; + }; + if (this.resultUsed) return getFullResult(); + /** @type {ExportsInfo | undefined} */ + let exportsInfo = moduleGraph.getExportsInfo( + /** @type {Module} */ (moduleGraph.getParentModule(this)) + ); + for (const name of this.names) { + const exportInfo = /** @type {ExportInfo} */ ( + exportsInfo.getReadOnlyExportInfo(name) + ); + const used = exportInfo.getUsed(runtime); + if (used === UsageState.Unused) return Dependency.NO_EXPORTS_REFERENCED; + if (used !== UsageState.OnlyPropertiesUsed) return getFullResult(); + exportsInfo = exportInfo.exportsInfo; + if (!exportsInfo) return getFullResult(); + } + if (exportsInfo.otherExportsInfo.getUsed(runtime) !== UsageState.Unused) { + return getFullResult(); + } + /** @type {string[][]} */ + const referencedExports = []; + for (const exportInfo of exportsInfo.orderedExports) { + processExportInfo( + runtime, + referencedExports, + ids.concat(exportInfo.name), + exportInfo, + false + ); + } + return referencedExports.map(name => ({ + name, + canMangle: false + })); + } + + /** + * Returns the exported names + * @param {ModuleGraph} moduleGraph module graph + * @returns {ExportsSpec | undefined} export names + */ + getExports(moduleGraph) { + if (this.names.length === 1) { + const ids = this.getIds(moduleGraph); + const name = this.names[0]; + const from = moduleGraph.getConnection(this); + if (!from) return; + return { + exports: [ + { + name, + from, + export: ids.length === 0 ? null : ids, + // we can't mangle names that are in an empty object + // because one could access the prototype property + // when export isn't set yet + canMangle: !(name in EMPTY_OBJECT) && false + } + ], + dependencies: [from.module] + }; + } else if (this.names.length > 0) { + const name = this.names[0]; + return { + exports: [ + { + name, + // we can't mangle names that are in an empty object + // because one could access the prototype property + // when export isn't set yet + canMangle: !(name in EMPTY_OBJECT) && false + } + ], + dependencies: undefined + }; + } + const from = moduleGraph.getConnection(this); + if (!from) return; + const reexportInfo = this.getStarReexports( + moduleGraph, + undefined, + from.module + ); + const ids = this.getIds(moduleGraph); + if (reexportInfo) { + return { + exports: Array.from( + /** @type {TODO} */ (reexportInfo).exports, + name => ({ + name, + from, + export: ids.concat(name), + canMangle: !(name in EMPTY_OBJECT) && false + }) + ), + // TODO handle deep reexports + dependencies: [from.module] + }; + } + return { + exports: true, + from: ids.length === 0 ? from : undefined, + canMangle: false, + dependencies: [from.module] + }; + } + + /** + * @param {ModuleGraph} moduleGraph the module graph + * @param {RuntimeSpec} runtime the runtime + * @param {Module} importedModule the imported module (optional) + * @returns {{exports?: Set<string>, checked?: Set<string>} | undefined} information + */ + getStarReexports( + moduleGraph, + runtime, + importedModule = /** @type {Module} */ (moduleGraph.getModule(this)) + ) { + /** @type {ExportsInfo | undefined} */ + let importedExportsInfo = moduleGraph.getExportsInfo(importedModule); + const ids = this.getIds(moduleGraph); + if (ids.length > 0) + importedExportsInfo = importedExportsInfo.getNestedExportsInfo(ids); + /** @type {ExportsInfo | undefined} */ + let exportsInfo = moduleGraph.getExportsInfo( + /** @type {Module} */ (moduleGraph.getParentModule(this)) + ); + if (this.names.length > 0) + exportsInfo = exportsInfo.getNestedExportsInfo(this.names); + + const noExtraExports = + importedExportsInfo && + importedExportsInfo.otherExportsInfo.provided === false; + const noExtraImports = + exportsInfo && + exportsInfo.otherExportsInfo.getUsed(runtime) === UsageState.Unused; + + if (!noExtraExports && !noExtraImports) { + return; + } + + const isNamespaceImport = + importedModule.getExportsType(moduleGraph, false) === "namespace"; + + /** @type {Set<string>} */ + const exports = new Set(); + /** @type {Set<string>} */ + const checked = new Set(); + + if (noExtraImports) { + for (const exportInfo of /** @type {ExportsInfo} */ (exportsInfo) + .orderedExports) { + const name = exportInfo.name; + if (exportInfo.getUsed(runtime) === UsageState.Unused) continue; + if (name === "__esModule" && isNamespaceImport) { + exports.add(name); + } else if (importedExportsInfo) { + const importedExportInfo = + importedExportsInfo.getReadOnlyExportInfo(name); + if (importedExportInfo.provided === false) continue; + exports.add(name); + if (importedExportInfo.provided === true) continue; + checked.add(name); + } else { + exports.add(name); + checked.add(name); + } + } + } else if (noExtraExports) { + for (const importedExportInfo of /** @type {ExportsInfo} */ ( + importedExportsInfo + ).orderedExports) { + const name = importedExportInfo.name; + if (importedExportInfo.provided === false) continue; + if (exportsInfo) { + const exportInfo = exportsInfo.getReadOnlyExportInfo(name); + if (exportInfo.getUsed(runtime) === UsageState.Unused) continue; + } + exports.add(name); + if (importedExportInfo.provided === true) continue; + checked.add(name); + } + if (isNamespaceImport) { + exports.add("__esModule"); + checked.delete("__esModule"); + } + } + + return { exports, checked }; + } + + /** + * @param {ObjectSerializerContext} context context + */ + serialize(context) { + const { write } = context; + write(this.asiSafe); + write(this.range); + write(this.valueRange); + write(this.base); + write(this.names); + write(this.ids); + write(this.resultUsed); + super.serialize(context); + } + + /** + * @param {ObjectDeserializerContext} context context + */ + deserialize(context) { + const { read } = context; + this.asiSafe = read(); + this.range = read(); + this.valueRange = read(); + this.base = read(); + this.names = read(); + this.ids = read(); + this.resultUsed = read(); + super.deserialize(context); + } +} + +makeSerializable( + CommonJsExportRequireDependency, + "webpack/lib/dependencies/CommonJsExportRequireDependency" +); + +CommonJsExportRequireDependency.Template = class CommonJsExportRequireDependencyTemplate extends ( + ModuleDependency.Template +) { + /** + * @param {Dependency} dependency the dependency for which the template should be applied + * @param {ReplaceSource} source the current replace source which can be modified + * @param {DependencyTemplateContext} templateContext the context object + * @returns {void} + */ + apply( + dependency, + source, + { + module, + runtimeTemplate, + chunkGraph, + moduleGraph, + runtimeRequirements, + runtime + } + ) { + const dep = /** @type {CommonJsExportRequireDependency} */ (dependency); + const used = moduleGraph + .getExportsInfo(module) + .getUsedName(dep.names, runtime); + + const [type, base] = handleDependencyBase( + dep.base, + module, + runtimeRequirements + ); + + const importedModule = moduleGraph.getModule(dep); + let requireExpr = runtimeTemplate.moduleExports({ + module: importedModule, + chunkGraph, + request: dep.request, + weak: dep.weak, + runtimeRequirements + }); + if (importedModule) { + const ids = dep.getIds(moduleGraph); + const usedImported = moduleGraph + .getExportsInfo(importedModule) + .getUsedName(ids, runtime); + if (usedImported) { + const comment = equals(usedImported, ids) + ? "" + : `${Template.toNormalComment(propertyAccess(ids))} `; + requireExpr += `${comment}${propertyAccess(usedImported)}`; + } + } + + switch (type) { + case "expression": + source.replace( + dep.range[0], + dep.range[1] - 1, + used + ? `${base}${propertyAccess(used)} = ${requireExpr}` + : `/* unused reexport */ ${requireExpr}` + ); + return; + case "Object.defineProperty": + throw new Error("TODO"); + default: + throw new Error("Unexpected type"); + } + } +}; + +module.exports = CommonJsExportRequireDependency; |