@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
91 lines • 8.67 kB
JavaScript
;
/**
* @license
* Copyright Google LLC 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
*/
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const core_1 = require("@babel/core");
const helper_annotate_as_pure_1 = __importDefault(require("@babel/helper-annotate-as-pure"));
const tslib = __importStar(require("tslib"));
/**
* A cached set of TypeScript helper function names used by the helper name matcher utility function.
*/
const tslibHelpers = new Set(Object.keys(tslib).filter((h) => h.startsWith('__')));
/**
* Determinates whether an identifier name matches one of the TypeScript helper function names.
*
* @param name The identifier name to check.
* @returns True, if the name matches a TypeScript helper name; otherwise, false.
*/
function isTslibHelperName(name) {
const nameParts = name.split('$');
const originalName = nameParts[0];
if (nameParts.length > 2 || (nameParts.length === 2 && isNaN(+nameParts[1]))) {
return false;
}
return tslibHelpers.has(originalName);
}
/**
* A babel plugin factory function for adding the PURE annotation to top-level new and call expressions.
*
* @returns A babel plugin object instance.
*/
function default_1() {
return {
visitor: {
CallExpression(path) {
// If the expression has a function parent, it is not top-level
if (path.getFunctionParent()) {
return;
}
const callee = path.node.callee;
if (core_1.types.isFunctionExpression(callee) && path.node.arguments.length !== 0) {
return;
}
// Do not annotate TypeScript helpers emitted by the TypeScript compiler.
// TypeScript helpers are intended to cause side effects.
if (core_1.types.isIdentifier(callee) && isTslibHelperName(callee.name)) {
return;
}
(0, helper_annotate_as_pure_1.default)(path);
},
NewExpression(path) {
// If the expression has a function parent, it is not top-level
if (!path.getFunctionParent()) {
(0, helper_annotate_as_pure_1.default)(path);
}
},
},
};
}
exports.default = default_1;
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B9LFxuICAgIH0sXG4gIH07XG59XG4iXX0=