@angular-devkit/build-angular
Version:
Angular Webpack Build Facade
68 lines • 7.56 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
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.getKeywords = void 0;
const core_1 = require("@babel/core");
/**
* The name of the Angular class metadata function created by the Angular compiler.
*/
const SET_CLASS_METADATA_NAME = 'ɵsetClassMetadata';
/**
* Provides one or more keywords that if found within the content of a source file indicate
* that this plugin should be used with a source file.
*
* @returns An a string iterable containing one or more keywords.
*/
function getKeywords() {
return [SET_CLASS_METADATA_NAME];
}
exports.getKeywords = getKeywords;
/**
* A babel plugin factory function for eliding the Angular class metadata function (`ɵsetClassMetadata`).
*
* @returns A babel plugin object instance.
*/
function default_1() {
return {
visitor: {
CallExpression(path) {
const callee = path.node.callee;
// The function being called must be the metadata function name
let calleeName;
if (core_1.types.isMemberExpression(callee) && core_1.types.isIdentifier(callee.property)) {
calleeName = callee.property.name;
}
else if (core_1.types.isIdentifier(callee)) {
calleeName = callee.name;
}
if (calleeName !== SET_CLASS_METADATA_NAME) {
return;
}
// There must be four arguments that meet the following criteria:
// * First must be an identifier
// * Second must be an array literal
const callArguments = path.node.arguments;
if (callArguments.length !== 4 ||
!core_1.types.isIdentifier(callArguments[0]) ||
!core_1.types.isArrayExpression(callArguments[1])) {
return;
}
// The metadata function is always emitted inside a function expression
if (!path.getFunctionParent()?.isFunctionExpression()) {
return;
}
// Replace the metadata function with `void 0` which is the equivalent return value
// of the metadata function.
path.replaceWith(path.scope.buildUndefinedNode());
},
},
};
}
exports.default = default_1;
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