eslint-plugin-sonarjs
Version:
SonarJS rules for ESLint
55 lines (54 loc) • 2.31 kB
JavaScript
;
/*
* SonarQube JavaScript Plugin
* Copyright (C) 2011-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
*
* 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/S1526/javascript
Object.defineProperty(exports, "__esModule", { value: true });
exports.rule = void 0;
const index_js_1 = require("../helpers/index.js");
const meta_js_1 = require("./meta.js");
exports.rule = {
meta: (0, index_js_1.generateMeta)(meta_js_1.meta, undefined, true),
create(context) {
return {
"VariableDeclaration[kind='var']": (node) => {
const variables = context.sourceCode.getDeclaredVariables(node);
for (const variable of variables) {
const declaration = variable.identifiers[0];
const misused = variable.references
.filter(reference => !reference.init && comesBefore(reference.identifier, declaration))
.map(reference => reference.identifier);
if (misused.length > 0) {
(0, index_js_1.report)(context, {
message: `Move the declaration of "${declaration.name}" before this usage.`,
node: misused[0],
}, [(0, index_js_1.toSecondaryLocation)(declaration, 'Declaration')]);
}
}
},
};
},
};
function comesBefore(node, other) {
const nodeLine = line(node), otherLine = line(other);
return nodeLine < otherLine || (nodeLine === otherLine && column(node) < column(other));
}
function line(node) {
return node.loc.start.line;
}
function column(node) {
return node.loc.start.column;
}