@angular-devkit/build-optimizer
Version:
Angular Build Optimizer
83 lines (82 loc) • 3.16 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;
Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (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;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getCleanHelperName = exports.isHelperName = exports.hasPureComment = exports.addPureComment = exports.collectDeepNodes = void 0;
const tslib = __importStar(require("tslib"));
const ts = __importStar(require("typescript"));
const pureFunctionComment = '@__PURE__';
// We include only exports that start with '__' because tslib helpers
// all start with a suffix of two underscores.
const tslibHelpers = new Set(Object.keys(tslib).filter((h) => h.startsWith('__')));
// Find all nodes from the AST in the subtree of node of SyntaxKind kind.
function collectDeepNodes(node, kind) {
const nodes = [];
const helper = (child) => {
if (child.kind === kind) {
nodes.push(child);
}
ts.forEachChild(child, helper);
};
ts.forEachChild(node, helper);
return nodes;
}
exports.collectDeepNodes = collectDeepNodes;
function addPureComment(node) {
return ts.addSyntheticLeadingComment(node, ts.SyntaxKind.MultiLineCommentTrivia, pureFunctionComment, false);
}
exports.addPureComment = addPureComment;
function hasPureComment(node) {
if (!node) {
return false;
}
const leadingComment = ts.getSyntheticLeadingComments(node);
return !!leadingComment && leadingComment.some((comment) => comment.text === pureFunctionComment);
}
exports.hasPureComment = hasPureComment;
function isHelperName(name) {
return tslibHelpers.has(name);
}
exports.isHelperName = isHelperName;
/**
* In FESM's when not using `importHelpers` there might be multiple in the same file.
@example
```
var __decorate$1 = '';
var __decorate$2 = '';
```
* @returns Helper name without the '$' and number suffix or `undefined` if it's not a helper.
*/
function getCleanHelperName(name) {
const parts = name.split('$');
const cleanName = parts[0];
if (parts.length > 2 || (parts.length === 2 && isNaN(+parts[1]))) {
return undefined;
}
return isHelperName(cleanName) ? cleanName : undefined;
}
exports.getCleanHelperName = getCleanHelperName;