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/**
* @fileoverview Require use of static imports where possible.
*
* 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 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/rules/use-static-import.html",
},
fixable: "code",
messages: {
useStaticImport:
"Please use static import instead of ChromeUtils.importESModule",
},
schema: [],
type: "suggestion",
},
create(context) {
return {
VariableDeclarator(node) {
if (
node.init?.type != "CallExpression" ||
node.init?.callee?.type != "MemberExpression" ||
!context.getFilename().endsWith(".sys.mjs") ||
!helpers.isTopLevel(context.getAncestors())
) {
return;
}
let callee = node.init.callee;
if (
isIdentifier(callee.object, "ChromeUtils") &&
isIdentifier(callee.property, "importESModule") &&
callee.parent.arguments.length == 1
) {
let sourceCode = context.getSourceCode();
let importItemSource;
if (node.id.type != "ObjectPattern") {
importItemSource = sourceCode.getText(node.id);
} else {
importItemSource = "{ ";
let initial = true;
for (let property of node.id.properties) {
if (!initial) {
importItemSource += ", ";
}
initial = false;
if (property.key.name == property.value.name) {
importItemSource += property.key.name;
} else {
importItemSource += `${property.key.name} as ${property.value.name}`;
}
}
importItemSource += " }";
}
context.report({
node: node.parent,
messageId: "useStaticImport",
fix(fixer) {
return fixer.replaceText(
node.parent,
`import ${importItemSource} from ${sourceCode.getText(
callee.parent.arguments[0]
)}`
);
},
});
}
},
};
},
};
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