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/**
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
"use strict";
const helpers = require("../helpers");
function findStatement(node) {
while (node && node.type !== "ExpressionStatement") {
node = node.parent;
}
return node;
}
function isIdentifier(node, id) {
return node && node.type === "Identifier" && node.name === id;
}
module.exports = {
meta: {
docs: {
url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/reject-multiple-getters-calls.html",
},
messages: {
rejectMultipleCalls:
"ChromeUtils.defineESModuleGetters is already called for {{target}} in the same context. Please merge those calls",
},
schema: [],
type: "suggestion",
},
create(context) {
const parentToTargets = new Map();
return {
CallExpression(node) {
let callee = node.callee;
if (
callee.type === "MemberExpression" &&
isIdentifier(callee.object, "ChromeUtils") &&
isIdentifier(callee.property, "defineESModuleGetters")
) {
const stmt = findStatement(node);
if (!stmt) {
return;
}
let target;
try {
target = helpers.getASTSource(node.arguments[0]);
} catch (e) {
return;
}
const parent = stmt.parent;
let targets;
if (parentToTargets.has(parent)) {
targets = parentToTargets.get(parent);
} else {
targets = new Set();
parentToTargets.set(parent, targets);
}
if (targets.has(target)) {
context.report({
node,
messageId: "rejectMultipleCalls",
data: { target },
});
}
targets.add(target);
}
},
};
},
};
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