| 1 | "use strict";
|
|---|
| 2 | /**
|
|---|
| 3 | * @license
|
|---|
| 4 | * Copyright Google LLC All Rights Reserved.
|
|---|
| 5 | *
|
|---|
| 6 | * Use of this source code is governed by an MIT-style license that can be
|
|---|
| 7 | * found in the LICENSE file at https://angular.io/license
|
|---|
| 8 | */
|
|---|
| 9 | var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
|
|---|
| 10 | if (k2 === undefined) k2 = k;
|
|---|
| 11 | Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
|
|---|
| 12 | }) : (function(o, m, k, k2) {
|
|---|
| 13 | if (k2 === undefined) k2 = k;
|
|---|
| 14 | o[k2] = m[k];
|
|---|
| 15 | }));
|
|---|
| 16 | var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
|
|---|
| 17 | Object.defineProperty(o, "default", { enumerable: true, value: v });
|
|---|
| 18 | }) : function(o, v) {
|
|---|
| 19 | o["default"] = v;
|
|---|
| 20 | });
|
|---|
| 21 | var __importStar = (this && this.__importStar) || function (mod) {
|
|---|
| 22 | if (mod && mod.__esModule) return mod;
|
|---|
| 23 | var result = {};
|
|---|
| 24 | if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
|
|---|
| 25 | __setModuleDefault(result, mod);
|
|---|
| 26 | return result;
|
|---|
| 27 | };
|
|---|
| 28 | Object.defineProperty(exports, "__esModule", { value: true });
|
|---|
| 29 | exports.expect = exports.createScrubFileTransformerFactory = exports.testScrubFile = void 0;
|
|---|
| 30 | const ts = __importStar(require("typescript"));
|
|---|
| 31 | const ast_utils_1 = require("../helpers/ast-utils");
|
|---|
| 32 | function testScrubFile(content) {
|
|---|
| 33 | const markers = [
|
|---|
| 34 | 'decorators',
|
|---|
| 35 | '__decorate',
|
|---|
| 36 | 'propDecorators',
|
|---|
| 37 | 'ctorParameters',
|
|---|
| 38 | 'ɵsetClassMetadata',
|
|---|
| 39 | ];
|
|---|
| 40 | return markers.some((marker) => content.includes(marker));
|
|---|
| 41 | }
|
|---|
| 42 | exports.testScrubFile = testScrubFile;
|
|---|
| 43 | function createScrubFileTransformerFactory(isAngularCoreFile) {
|
|---|
| 44 | return (program) => scrubFileTransformer(program, isAngularCoreFile);
|
|---|
| 45 | }
|
|---|
| 46 | exports.createScrubFileTransformerFactory = createScrubFileTransformerFactory;
|
|---|
| 47 | function scrubFileTransformer(program, isAngularCoreFile) {
|
|---|
| 48 | if (!program) {
|
|---|
| 49 | throw new Error('scrubFileTransformer requires a TypeScript Program.');
|
|---|
| 50 | }
|
|---|
| 51 | const checker = program.getTypeChecker();
|
|---|
| 52 | return (context) => {
|
|---|
| 53 | const transformer = (sf) => {
|
|---|
| 54 | const ngMetadata = findAngularMetadata(sf, isAngularCoreFile);
|
|---|
| 55 | const tslibImports = findTslibImports(sf);
|
|---|
| 56 | const nodes = [];
|
|---|
| 57 | ts.forEachChild(sf, checkNodeForDecorators);
|
|---|
| 58 | function checkNodeForDecorators(node) {
|
|---|
| 59 | var _a;
|
|---|
| 60 | if (!ts.isExpressionStatement(node)) {
|
|---|
| 61 | return ts.forEachChild(node, checkNodeForDecorators);
|
|---|
| 62 | }
|
|---|
| 63 | const exprStmt = node;
|
|---|
| 64 | const iife = (_a = getIifeStatement(exprStmt)) === null || _a === void 0 ? void 0 : _a.expression;
|
|---|
| 65 | // Do checks that don't need the typechecker first and bail early.
|
|---|
| 66 | if (isCtorParamsAssignmentExpression(exprStmt)) {
|
|---|
| 67 | nodes.push(node);
|
|---|
| 68 | }
|
|---|
| 69 | else if (iife && isIvyPrivateCallExpression(iife, 'ɵsetClassMetadata')) {
|
|---|
| 70 | nodes.push(node);
|
|---|
| 71 | }
|
|---|
| 72 | else if (iife &&
|
|---|
| 73 | ts.isBinaryExpression(iife) &&
|
|---|
| 74 | isIvyPrivateCallExpression(iife.right, 'ɵsetClassMetadata')) {
|
|---|
| 75 | nodes.push(node);
|
|---|
| 76 | }
|
|---|
| 77 | else if (isDecoratorAssignmentExpression(exprStmt)) {
|
|---|
| 78 | nodes.push(...pickDecorationNodesToRemove(exprStmt, ngMetadata, checker));
|
|---|
| 79 | }
|
|---|
| 80 | else if (isDecorateAssignmentExpression(exprStmt, tslibImports, checker) ||
|
|---|
| 81 | isAngularDecoratorExpression(exprStmt, ngMetadata, tslibImports, checker)) {
|
|---|
| 82 | nodes.push(...pickDecorateNodesToRemove(exprStmt, tslibImports, ngMetadata, checker));
|
|---|
| 83 | }
|
|---|
| 84 | else if (isPropDecoratorAssignmentExpression(exprStmt)) {
|
|---|
| 85 | nodes.push(...pickPropDecorationNodesToRemove(exprStmt, ngMetadata, checker));
|
|---|
| 86 | }
|
|---|
| 87 | }
|
|---|
| 88 | const visitor = (node) => {
|
|---|
| 89 | // Check if node is a statement to be dropped.
|
|---|
| 90 | if (nodes.find((n) => n === node)) {
|
|---|
| 91 | return undefined;
|
|---|
| 92 | }
|
|---|
| 93 | // Otherwise return node as is.
|
|---|
| 94 | return ts.visitEachChild(node, visitor, context);
|
|---|
| 95 | };
|
|---|
| 96 | return ts.visitNode(sf, visitor);
|
|---|
| 97 | };
|
|---|
| 98 | return transformer;
|
|---|
| 99 | };
|
|---|
| 100 | }
|
|---|
| 101 | function expect(node, kind) {
|
|---|
| 102 | if (node.kind !== kind) {
|
|---|
| 103 | throw new Error('Invalid node type.');
|
|---|
| 104 | }
|
|---|
| 105 | return node;
|
|---|
| 106 | }
|
|---|
| 107 | exports.expect = expect;
|
|---|
| 108 | function findAngularMetadata(node, isAngularCoreFile) {
|
|---|
| 109 | let specs = [];
|
|---|
| 110 | // Find all specifiers from imports of `@angular/core`.
|
|---|
| 111 | ts.forEachChild(node, (child) => {
|
|---|
| 112 | if (child.kind === ts.SyntaxKind.ImportDeclaration) {
|
|---|
| 113 | const importDecl = child;
|
|---|
| 114 | if (isAngularCoreImport(importDecl, isAngularCoreFile)) {
|
|---|
| 115 | specs.push(...ast_utils_1.collectDeepNodes(importDecl, ts.SyntaxKind.ImportSpecifier));
|
|---|
| 116 | }
|
|---|
| 117 | }
|
|---|
| 118 | });
|
|---|
| 119 | // If the current module is a Angular core file, we also consider all declarations in it to
|
|---|
| 120 | // potentially be Angular metadata.
|
|---|
| 121 | if (isAngularCoreFile) {
|
|---|
| 122 | const localDecl = findAllDeclarations(node);
|
|---|
| 123 | specs = specs.concat(localDecl);
|
|---|
| 124 | }
|
|---|
| 125 | return specs;
|
|---|
| 126 | }
|
|---|
| 127 | function findAllDeclarations(node) {
|
|---|
| 128 | const nodes = [];
|
|---|
| 129 | ts.forEachChild(node, (child) => {
|
|---|
| 130 | if (child.kind === ts.SyntaxKind.VariableStatement) {
|
|---|
| 131 | const vStmt = child;
|
|---|
| 132 | vStmt.declarationList.declarations.forEach((decl) => {
|
|---|
| 133 | if (decl.name.kind !== ts.SyntaxKind.Identifier) {
|
|---|
| 134 | return;
|
|---|
| 135 | }
|
|---|
| 136 | nodes.push(decl);
|
|---|
| 137 | });
|
|---|
| 138 | }
|
|---|
| 139 | });
|
|---|
| 140 | return nodes;
|
|---|
| 141 | }
|
|---|
| 142 | function isAngularCoreImport(node, isAngularCoreFile) {
|
|---|
| 143 | if (!(node.moduleSpecifier && ts.isStringLiteral(node.moduleSpecifier))) {
|
|---|
| 144 | return false;
|
|---|
| 145 | }
|
|---|
| 146 | const importText = node.moduleSpecifier.text;
|
|---|
| 147 | // Imports to `@angular/core` are always core imports.
|
|---|
| 148 | if (importText === '@angular/core') {
|
|---|
| 149 | return true;
|
|---|
| 150 | }
|
|---|
| 151 | // Relative imports from a Angular core file are also core imports.
|
|---|
| 152 | if (isAngularCoreFile && importText.startsWith('.')) {
|
|---|
| 153 | return true;
|
|---|
| 154 | }
|
|---|
| 155 | return false;
|
|---|
| 156 | }
|
|---|
| 157 | // Check if assignment is `Clazz.decorators = [...];`.
|
|---|
| 158 | function isDecoratorAssignmentExpression(exprStmt) {
|
|---|
| 159 | if (!isAssignmentExpressionTo(exprStmt, 'decorators')) {
|
|---|
| 160 | return false;
|
|---|
| 161 | }
|
|---|
| 162 | const expr = exprStmt.expression;
|
|---|
| 163 | if (!ts.isArrayLiteralExpression(expr.right)) {
|
|---|
| 164 | return false;
|
|---|
| 165 | }
|
|---|
| 166 | return true;
|
|---|
| 167 | }
|
|---|
| 168 | // Check if assignment is `Clazz = __decorate([...], Clazz)`.
|
|---|
| 169 | function isDecorateAssignmentExpression(exprStmt, tslibImports, checker) {
|
|---|
| 170 | if (!ts.isBinaryExpression(exprStmt.expression)) {
|
|---|
| 171 | return false;
|
|---|
| 172 | }
|
|---|
| 173 | const expr = exprStmt.expression;
|
|---|
| 174 | if (!ts.isIdentifier(expr.left)) {
|
|---|
| 175 | return false;
|
|---|
| 176 | }
|
|---|
| 177 | const classIdent = expr.left;
|
|---|
| 178 | let callExpr;
|
|---|
| 179 | if (ts.isCallExpression(expr.right)) {
|
|---|
| 180 | callExpr = expr.right;
|
|---|
| 181 | }
|
|---|
| 182 | else if (ts.isBinaryExpression(expr.right)) {
|
|---|
| 183 | // `Clazz = Clazz_1 = __decorate([...], Clazz)` can be found when there are static property
|
|---|
| 184 | // accesses.
|
|---|
| 185 | const innerExpr = expr.right;
|
|---|
| 186 | if (!ts.isIdentifier(innerExpr.left) || !ts.isCallExpression(innerExpr.right)) {
|
|---|
| 187 | return false;
|
|---|
| 188 | }
|
|---|
| 189 | callExpr = innerExpr.right;
|
|---|
| 190 | }
|
|---|
| 191 | else {
|
|---|
| 192 | return false;
|
|---|
| 193 | }
|
|---|
| 194 | if (!isTslibHelper(callExpr, '__decorate', tslibImports, checker)) {
|
|---|
| 195 | return false;
|
|---|
| 196 | }
|
|---|
| 197 | if (callExpr.arguments.length !== 2) {
|
|---|
| 198 | return false;
|
|---|
| 199 | }
|
|---|
| 200 | const classArg = callExpr.arguments[1];
|
|---|
| 201 | if (!ts.isIdentifier(classArg)) {
|
|---|
| 202 | return false;
|
|---|
| 203 | }
|
|---|
| 204 | if (classIdent.text !== classArg.text) {
|
|---|
| 205 | return false;
|
|---|
| 206 | }
|
|---|
| 207 | if (!ts.isArrayLiteralExpression(callExpr.arguments[0])) {
|
|---|
| 208 | return false;
|
|---|
| 209 | }
|
|---|
| 210 | return true;
|
|---|
| 211 | }
|
|---|
| 212 | // Check if expression is `__decorate([smt, __metadata("design:type", Object)], ...)`.
|
|---|
| 213 | function isAngularDecoratorExpression(exprStmt, ngMetadata, tslibImports, checker) {
|
|---|
| 214 | if (!ts.isCallExpression(exprStmt.expression)) {
|
|---|
| 215 | return false;
|
|---|
| 216 | }
|
|---|
| 217 | const callExpr = exprStmt.expression;
|
|---|
| 218 | if (!isTslibHelper(callExpr, '__decorate', tslibImports, checker)) {
|
|---|
| 219 | return false;
|
|---|
| 220 | }
|
|---|
| 221 | if (callExpr.arguments.length !== 4) {
|
|---|
| 222 | return false;
|
|---|
| 223 | }
|
|---|
| 224 | const decorateArray = callExpr.arguments[0];
|
|---|
| 225 | if (!ts.isArrayLiteralExpression(decorateArray)) {
|
|---|
| 226 | return false;
|
|---|
| 227 | }
|
|---|
| 228 | // Check first array entry for Angular decorators.
|
|---|
| 229 | if (decorateArray.elements.length === 0 || !ts.isCallExpression(decorateArray.elements[0])) {
|
|---|
| 230 | return false;
|
|---|
| 231 | }
|
|---|
| 232 | return decorateArray.elements.some((decoratorCall) => {
|
|---|
| 233 | if (!ts.isCallExpression(decoratorCall) || !ts.isIdentifier(decoratorCall.expression)) {
|
|---|
| 234 | return false;
|
|---|
| 235 | }
|
|---|
| 236 | const decoratorId = decoratorCall.expression;
|
|---|
| 237 | return identifierIsMetadata(decoratorId, ngMetadata, checker);
|
|---|
| 238 | });
|
|---|
| 239 | }
|
|---|
| 240 | // Check if assignment is `Clazz.propDecorators = [...];`.
|
|---|
| 241 | function isPropDecoratorAssignmentExpression(exprStmt) {
|
|---|
| 242 | if (!isAssignmentExpressionTo(exprStmt, 'propDecorators')) {
|
|---|
| 243 | return false;
|
|---|
| 244 | }
|
|---|
| 245 | const expr = exprStmt.expression;
|
|---|
| 246 | if (expr.right.kind !== ts.SyntaxKind.ObjectLiteralExpression) {
|
|---|
| 247 | return false;
|
|---|
| 248 | }
|
|---|
| 249 | return true;
|
|---|
| 250 | }
|
|---|
| 251 | // Check if assignment is `Clazz.ctorParameters = [...];`.
|
|---|
| 252 | function isCtorParamsAssignmentExpression(exprStmt) {
|
|---|
| 253 | if (!isAssignmentExpressionTo(exprStmt, 'ctorParameters')) {
|
|---|
| 254 | return false;
|
|---|
| 255 | }
|
|---|
| 256 | const expr = exprStmt.expression;
|
|---|
| 257 | if (expr.right.kind !== ts.SyntaxKind.FunctionExpression &&
|
|---|
| 258 | expr.right.kind !== ts.SyntaxKind.ArrowFunction) {
|
|---|
| 259 | return false;
|
|---|
| 260 | }
|
|---|
| 261 | return true;
|
|---|
| 262 | }
|
|---|
| 263 | function isAssignmentExpressionTo(exprStmt, name) {
|
|---|
| 264 | if (!ts.isBinaryExpression(exprStmt.expression)) {
|
|---|
| 265 | return false;
|
|---|
| 266 | }
|
|---|
| 267 | const expr = exprStmt.expression;
|
|---|
| 268 | if (!ts.isPropertyAccessExpression(expr.left)) {
|
|---|
| 269 | return false;
|
|---|
| 270 | }
|
|---|
| 271 | const propAccess = expr.left;
|
|---|
| 272 | if (propAccess.name.text !== name) {
|
|---|
| 273 | return false;
|
|---|
| 274 | }
|
|---|
| 275 | if (!ts.isIdentifier(propAccess.expression)) {
|
|---|
| 276 | return false;
|
|---|
| 277 | }
|
|---|
| 278 | if (expr.operatorToken.kind !== ts.SyntaxKind.FirstAssignment) {
|
|---|
| 279 | return false;
|
|---|
| 280 | }
|
|---|
| 281 | return true;
|
|---|
| 282 | }
|
|---|
| 283 | // Each Ivy private call expression is inside an IIFE
|
|---|
| 284 | function getIifeStatement(exprStmt) {
|
|---|
| 285 | const expression = exprStmt.expression;
|
|---|
| 286 | if (!expression || !ts.isCallExpression(expression) || expression.arguments.length !== 0) {
|
|---|
| 287 | return null;
|
|---|
| 288 | }
|
|---|
| 289 | const parenExpr = expression;
|
|---|
| 290 | if (!ts.isParenthesizedExpression(parenExpr.expression)) {
|
|---|
| 291 | return null;
|
|---|
| 292 | }
|
|---|
| 293 | const funExpr = parenExpr.expression.expression;
|
|---|
| 294 | if (!ts.isFunctionExpression(funExpr)) {
|
|---|
| 295 | return null;
|
|---|
| 296 | }
|
|---|
| 297 | const innerStmts = funExpr.body.statements;
|
|---|
| 298 | if (innerStmts.length !== 1) {
|
|---|
| 299 | return null;
|
|---|
| 300 | }
|
|---|
| 301 | const innerExprStmt = innerStmts[0];
|
|---|
| 302 | if (!ts.isExpressionStatement(innerExprStmt)) {
|
|---|
| 303 | return null;
|
|---|
| 304 | }
|
|---|
| 305 | return innerExprStmt;
|
|---|
| 306 | }
|
|---|
| 307 | function isIvyPrivateCallExpression(expression, name) {
|
|---|
| 308 | // Now we're in the IIFE and have the inner expression statement. We can check if it matches
|
|---|
| 309 | // a private Ivy call.
|
|---|
| 310 | if (!ts.isCallExpression(expression)) {
|
|---|
| 311 | return false;
|
|---|
| 312 | }
|
|---|
| 313 | const propAccExpr = expression.expression;
|
|---|
| 314 | if (!ts.isPropertyAccessExpression(propAccExpr)) {
|
|---|
| 315 | return false;
|
|---|
| 316 | }
|
|---|
| 317 | if (propAccExpr.name.text != name) {
|
|---|
| 318 | return false;
|
|---|
| 319 | }
|
|---|
| 320 | return true;
|
|---|
| 321 | }
|
|---|
| 322 | // Remove Angular decorators from`Clazz.decorators = [...];`, or expression itself if all are
|
|---|
| 323 | // removed.
|
|---|
| 324 | function pickDecorationNodesToRemove(exprStmt, ngMetadata, checker) {
|
|---|
| 325 | const expr = expect(exprStmt.expression, ts.SyntaxKind.BinaryExpression);
|
|---|
| 326 | const literal = expect(expr.right, ts.SyntaxKind.ArrayLiteralExpression);
|
|---|
| 327 | if (!literal.elements.every((elem) => ts.isObjectLiteralExpression(elem))) {
|
|---|
| 328 | return [];
|
|---|
| 329 | }
|
|---|
| 330 | const elements = literal.elements;
|
|---|
| 331 | const ngDecorators = elements.filter((elem) => isAngularDecorator(elem, ngMetadata, checker));
|
|---|
| 332 | return elements.length > ngDecorators.length ? ngDecorators : [exprStmt];
|
|---|
| 333 | }
|
|---|
| 334 | // Remove Angular decorators from `Clazz = __decorate([...], Clazz)`, or expression itself if all
|
|---|
| 335 | // are removed.
|
|---|
| 336 | function pickDecorateNodesToRemove(exprStmt, tslibImports, ngMetadata, checker) {
|
|---|
| 337 | let callExpr;
|
|---|
| 338 | if (ts.isCallExpression(exprStmt.expression)) {
|
|---|
| 339 | callExpr = exprStmt.expression;
|
|---|
| 340 | }
|
|---|
| 341 | else if (ts.isBinaryExpression(exprStmt.expression)) {
|
|---|
| 342 | const expr = exprStmt.expression;
|
|---|
| 343 | if (ts.isCallExpression(expr.right)) {
|
|---|
| 344 | callExpr = expr.right;
|
|---|
| 345 | }
|
|---|
| 346 | else if (ts.isBinaryExpression(expr.right) && ts.isCallExpression(expr.right.right)) {
|
|---|
| 347 | callExpr = expr.right.right;
|
|---|
| 348 | }
|
|---|
| 349 | }
|
|---|
| 350 | if (!callExpr) {
|
|---|
| 351 | return [];
|
|---|
| 352 | }
|
|---|
| 353 | const arrLiteral = expect(callExpr.arguments[0], ts.SyntaxKind.ArrayLiteralExpression);
|
|---|
| 354 | if (!arrLiteral.elements.every((elem) => ts.isCallExpression(elem))) {
|
|---|
| 355 | return [];
|
|---|
| 356 | }
|
|---|
| 357 | const elements = arrLiteral.elements;
|
|---|
| 358 | const ngDecoratorCalls = elements.filter((el) => {
|
|---|
| 359 | if (!ts.isIdentifier(el.expression)) {
|
|---|
| 360 | return false;
|
|---|
| 361 | }
|
|---|
| 362 | return identifierIsMetadata(el.expression, ngMetadata, checker);
|
|---|
| 363 | });
|
|---|
| 364 | // Remove __metadata calls of type 'design:paramtypes'.
|
|---|
| 365 | const metadataCalls = elements.filter((el) => {
|
|---|
| 366 | if (!isTslibHelper(el, '__metadata', tslibImports, checker)) {
|
|---|
| 367 | return false;
|
|---|
| 368 | }
|
|---|
| 369 | if (el.arguments.length < 2 || !ts.isStringLiteral(el.arguments[0])) {
|
|---|
| 370 | return false;
|
|---|
| 371 | }
|
|---|
| 372 | return true;
|
|---|
| 373 | });
|
|---|
| 374 | // Remove all __param calls.
|
|---|
| 375 | const paramCalls = elements.filter((el) => {
|
|---|
| 376 | if (!isTslibHelper(el, '__param', tslibImports, checker)) {
|
|---|
| 377 | return false;
|
|---|
| 378 | }
|
|---|
| 379 | if (el.arguments.length !== 2 || !ts.isNumericLiteral(el.arguments[0])) {
|
|---|
| 380 | return false;
|
|---|
| 381 | }
|
|---|
| 382 | return true;
|
|---|
| 383 | });
|
|---|
| 384 | if (ngDecoratorCalls.length === 0) {
|
|---|
| 385 | return [];
|
|---|
| 386 | }
|
|---|
| 387 | const callCount = ngDecoratorCalls.length + metadataCalls.length + paramCalls.length;
|
|---|
| 388 | // If all decorators are metadata decorators then return the whole `Class = __decorate([...])'`
|
|---|
| 389 | // statement so that it is removed in entirety.
|
|---|
| 390 | // If not then only remove the Angular decorators.
|
|---|
| 391 | // The metadata and param calls may be used by the non-Angular decorators.
|
|---|
| 392 | return elements.length === callCount ? [exprStmt] : ngDecoratorCalls;
|
|---|
| 393 | }
|
|---|
| 394 | // Remove Angular decorators from`Clazz.propDecorators = [...];`, or expression itself if all
|
|---|
| 395 | // are removed.
|
|---|
| 396 | function pickPropDecorationNodesToRemove(exprStmt, ngMetadata, checker) {
|
|---|
| 397 | const expr = expect(exprStmt.expression, ts.SyntaxKind.BinaryExpression);
|
|---|
| 398 | const literal = expect(expr.right, ts.SyntaxKind.ObjectLiteralExpression);
|
|---|
| 399 | if (!literal.properties.every((elem) => ts.isPropertyAssignment(elem) && ts.isArrayLiteralExpression(elem.initializer))) {
|
|---|
| 400 | return [];
|
|---|
| 401 | }
|
|---|
| 402 | const assignments = literal.properties;
|
|---|
| 403 | // Consider each assignment individually. Either the whole assignment will be removed or
|
|---|
| 404 | // a particular decorator within will.
|
|---|
| 405 | const toRemove = assignments
|
|---|
| 406 | .map((assign) => {
|
|---|
| 407 | const decorators = expect(assign.initializer, ts.SyntaxKind.ArrayLiteralExpression).elements;
|
|---|
| 408 | if (!decorators.every((el) => ts.isObjectLiteralExpression(el))) {
|
|---|
| 409 | return [];
|
|---|
| 410 | }
|
|---|
| 411 | const decsToRemove = decorators.filter((expression) => {
|
|---|
| 412 | const lit = expect(expression, ts.SyntaxKind.ObjectLiteralExpression);
|
|---|
| 413 | return isAngularDecorator(lit, ngMetadata, checker);
|
|---|
| 414 | });
|
|---|
| 415 | if (decsToRemove.length === decorators.length) {
|
|---|
| 416 | return [assign];
|
|---|
| 417 | }
|
|---|
| 418 | return decsToRemove;
|
|---|
| 419 | })
|
|---|
| 420 | .reduce((accum, toRm) => accum.concat(toRm), []);
|
|---|
| 421 | // If every node to be removed is a property assignment (full property's decorators) and
|
|---|
| 422 | // all properties are accounted for, remove the whole assignment. Otherwise, remove the
|
|---|
| 423 | // nodes which were marked as safe.
|
|---|
| 424 | if (toRemove.length === assignments.length &&
|
|---|
| 425 | toRemove.every((node) => ts.isPropertyAssignment(node))) {
|
|---|
| 426 | return [exprStmt];
|
|---|
| 427 | }
|
|---|
| 428 | return toRemove;
|
|---|
| 429 | }
|
|---|
| 430 | function isAngularDecorator(literal, ngMetadata, checker) {
|
|---|
| 431 | const types = literal.properties.filter(isTypeProperty);
|
|---|
| 432 | if (types.length !== 1) {
|
|---|
| 433 | return false;
|
|---|
| 434 | }
|
|---|
| 435 | const assign = expect(types[0], ts.SyntaxKind.PropertyAssignment);
|
|---|
| 436 | if (!ts.isIdentifier(assign.initializer)) {
|
|---|
| 437 | return false;
|
|---|
| 438 | }
|
|---|
| 439 | const id = assign.initializer;
|
|---|
| 440 | const res = identifierIsMetadata(id, ngMetadata, checker);
|
|---|
| 441 | return res;
|
|---|
| 442 | }
|
|---|
| 443 | function isTypeProperty(prop) {
|
|---|
| 444 | if (!ts.isPropertyAssignment(prop)) {
|
|---|
| 445 | return false;
|
|---|
| 446 | }
|
|---|
| 447 | if (!ts.isIdentifier(prop.name)) {
|
|---|
| 448 | return false;
|
|---|
| 449 | }
|
|---|
| 450 | return prop.name.text === 'type';
|
|---|
| 451 | }
|
|---|
| 452 | // Check if an identifier is part of the known Angular Metadata.
|
|---|
| 453 | function identifierIsMetadata(id, metadata, checker) {
|
|---|
| 454 | const symbol = checker.getSymbolAtLocation(id);
|
|---|
| 455 | if (!symbol || !symbol.declarations || !symbol.declarations.length) {
|
|---|
| 456 | return false;
|
|---|
| 457 | }
|
|---|
| 458 | return symbol.declarations.some((spec) => metadata.includes(spec));
|
|---|
| 459 | }
|
|---|
| 460 | // Find all named imports for `tslib`.
|
|---|
| 461 | function findTslibImports(node) {
|
|---|
| 462 | const imports = [];
|
|---|
| 463 | ts.forEachChild(node, (child) => {
|
|---|
| 464 | var _a, _b;
|
|---|
| 465 | if (ts.isImportDeclaration(child) &&
|
|---|
| 466 | child.moduleSpecifier &&
|
|---|
| 467 | ts.isStringLiteral(child.moduleSpecifier) &&
|
|---|
| 468 | child.moduleSpecifier.text === 'tslib' &&
|
|---|
| 469 | ((_a = child.importClause) === null || _a === void 0 ? void 0 : _a.namedBindings) &&
|
|---|
| 470 | ts.isNamedImports((_b = child.importClause) === null || _b === void 0 ? void 0 : _b.namedBindings)) {
|
|---|
| 471 | imports.push(child.importClause.namedBindings);
|
|---|
| 472 | }
|
|---|
| 473 | });
|
|---|
| 474 | return imports;
|
|---|
| 475 | }
|
|---|
| 476 | // Check if a function call is a tslib helper.
|
|---|
| 477 | function isTslibHelper(callExpr, helper, tslibImports, checker) {
|
|---|
| 478 | var _a;
|
|---|
| 479 | if (!ts.isIdentifier(callExpr.expression) || callExpr.expression.text !== helper) {
|
|---|
| 480 | return false;
|
|---|
| 481 | }
|
|---|
| 482 | const symbol = checker.getSymbolAtLocation(callExpr.expression);
|
|---|
| 483 | if (!((_a = symbol === null || symbol === void 0 ? void 0 : symbol.declarations) === null || _a === void 0 ? void 0 : _a.length)) {
|
|---|
| 484 | return false;
|
|---|
| 485 | }
|
|---|
| 486 | for (const dec of symbol.declarations) {
|
|---|
| 487 | if (ts.isImportSpecifier(dec) && tslibImports.some((name) => name.elements.includes(dec))) {
|
|---|
| 488 | return true;
|
|---|
| 489 | }
|
|---|
| 490 | // Handle inline helpers `var __decorate = (this...`
|
|---|
| 491 | if (ts.isVariableDeclaration(dec)) {
|
|---|
| 492 | return true;
|
|---|
| 493 | }
|
|---|
| 494 | }
|
|---|
| 495 | return false;
|
|---|
| 496 | }
|
|---|
