@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
65 lines (64 loc) • 3.16 kB
JavaScript
;
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.DedupeModuleResolvePlugin = void 0;
const webpack_diagnostics_1 = require("../../utils/webpack-diagnostics");
/**
* DedupeModuleResolvePlugin is a webpack plugin which dedupes modules with the same name and versions
* that are laid out in different parts of the node_modules tree.
*
* This is needed because Webpack relies on package managers to hoist modules and doesn't have any deduping logic.
*
* This is similar to how Webpack's 'NormalModuleReplacementPlugin' works
* @see https://github.com/webpack/webpack/blob/4a1f068828c2ab47537d8be30d542cd3a1076db4/lib/NormalModuleReplacementPlugin.js#L9
*/
class DedupeModuleResolvePlugin {
constructor(options) {
this.options = options;
this.modules = new Map();
}
apply(compiler) {
compiler.hooks.compilation.tap('DedupeModuleResolvePlugin', (compilation, { normalModuleFactory }) => {
normalModuleFactory.hooks.afterResolve.tap('DedupeModuleResolvePlugin', (result) => {
var _a;
if (!result) {
return;
}
const { resource, request, resourceResolveData } = result;
const { descriptionFileData, relativePath } = resourceResolveData;
// Empty name or versions are no valid primary entrypoints of a library
if (!(descriptionFileData === null || descriptionFileData === void 0 ? void 0 : descriptionFileData.name) || !(descriptionFileData === null || descriptionFileData === void 0 ? void 0 : descriptionFileData.version)) {
return;
}
const moduleId = descriptionFileData.name + '@' + descriptionFileData.version + ':' + relativePath;
const prevResolvedModule = this.modules.get(moduleId);
if (!prevResolvedModule) {
// This is the first time we visit this module.
this.modules.set(moduleId, {
resource,
request,
});
return;
}
const { resource: prevResource, request: prevRequest } = prevResolvedModule;
if (result.resource === prevResource) {
// No deduping needed.
// Current path and previously resolved path are the same.
return;
}
if ((_a = this.options) === null || _a === void 0 ? void 0 : _a.verbose) {
webpack_diagnostics_1.addWarning(compilation, `[DedupeModuleResolvePlugin]: ${result.resource} -> ${prevResource}`);
}
// Alter current request with previously resolved module.
result.request = prevRequest;
});
});
}
}
exports.DedupeModuleResolvePlugin = DedupeModuleResolvePlugin;