eslint-plugin-sonarjs
Version:
118 lines (117 loc) • 5 kB
JavaScript
;
/*
* SonarQube JavaScript Plugin
* Copyright (C) SonarSource Sàrl
* mailto:info AT sonarsource DOT com
*
* You can redistribute and/or modify this program under the terms of
* the Sonar Source-Available License Version 1, as published by SonarSource Sàrl.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the Sonar Source-Available License for more details.
*
* You should have received a copy of the Sonar Source-Available License
* along with this program; if not, see https://sonarsource.com/license/ssal/
*/
// https://sonarsource.github.io/rspec/#/rspec/S4324/javascript
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 () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__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 });
exports.rule = void 0;
const parser_services_js_1 = require("../helpers/parser-services.js");
const generate_meta_js_1 = require("../helpers/generate-meta.js");
const collection_js_1 = require("../helpers/collection.js");
const typescript_1 = __importDefault(require("typescript"));
const meta = __importStar(require("./generated-meta.js"));
exports.rule = {
meta: (0, generate_meta_js_1.generateMeta)(meta, {
messages: {
removeOrChangeType: 'Remove this return type or change it to a more specific.',
},
}),
create(context) {
const services = context.sourceCode.parserServices;
if ((0, parser_services_js_1.isRequiredParserServices)(services)) {
const returnedExpressions = [];
return {
ReturnStatement(node) {
if (returnedExpressions.length > 0) {
(0, collection_js_1.last)(returnedExpressions).push(node.argument);
}
},
FunctionDeclaration() {
returnedExpressions.push([]);
},
'FunctionDeclaration:exit'(node) {
const returnType = node.returnType;
if (returnType?.typeAnnotation.type === 'TSAnyKeyword' &&
returnedExpressions.length > 0 &&
allReturnTypesEqual((0, collection_js_1.last)(returnedExpressions), services)) {
context.report({
messageId: 'removeOrChangeType',
loc: returnType.loc,
});
}
returnedExpressions.pop();
},
};
}
return {};
},
};
function allReturnTypesEqual(returns, services) {
const firstReturnType = getTypeFromTreeNode(returns.pop(), services);
if (!!firstReturnType && !!isPrimitiveType(firstReturnType)) {
return returns.every(nextReturn => {
const nextReturnType = getTypeFromTreeNode(nextReturn, services);
return !!nextReturnType && nextReturnType.flags === firstReturnType.flags;
});
}
return false;
}
function getTypeFromTreeNode(node, services) {
const checker = services.program.getTypeChecker();
return checker.getTypeAtLocation(services.esTreeNodeToTSNodeMap.get(node));
}
function isPrimitiveType({ flags }) {
return (flags & typescript_1.default.TypeFlags.BooleanLike ||
flags & typescript_1.default.TypeFlags.NumberLike ||
flags & typescript_1.default.TypeFlags.StringLike ||
flags & typescript_1.default.TypeFlags.EnumLike);
}