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88 lines
3.6 KiB
88 lines
3.6 KiB
'use strict';
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const kebabCase = require('kebab-case');
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const rules = require('./rules');
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const forbiddenLibs = ['lodash', 'lodash-es'];
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function getAssignmentLeftHandSide(node) {
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// For VariableDeclarator nodes, the left hand side is called `id`
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// The `x` on `var x = 3;
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if (node.type === 'VariableDeclarator') {
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return node.id;
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}
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// For AssignmentExpression nodes, the left hand side is called `left`
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// The `x` on `x = 3;
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if (node.type === 'AssignmentExpression') {
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return node.left;
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}
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return null;
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}
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for (const rule in rules) {
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const alternative = rules[rule].alternative;
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const ruleName = rules[rule].ruleName || kebabCase(rule);
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const forbiddenImports = { [`lodash/${rule}`]: 1, [`lodash-es/${rule}`]: 1, [`lodash.${rule.toLowerCase()}`]: 1 };
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module.exports[ruleName] = {
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create(context) {
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return {
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CallExpression(node) {
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const callee = node.callee;
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const objectName = callee.name || (callee.object && callee.object.name) || (callee.object && callee.object.callee && callee.object.callee.name);
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if (objectName === 'require' && node.arguments.length === 1) {
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const requiredModuleName = node.arguments[0].value;
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const { parent } = node;
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if (forbiddenLibs.includes(requiredModuleName)) {
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const leftHandSide = getAssignmentLeftHandSide(parent);
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// ex: const { indexOf } = require('lodash');
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// ex: ({ indexOf } = require('lodash'));
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if (leftHandSide && leftHandSide.type === 'ObjectPattern') {
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leftHandSide.properties.forEach(property => {
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if (property.key.name === rule) {
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context.report({
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node,
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message: `{ ${rule} } = require('${requiredModuleName}') detected. Consider using the native ${alternative}`
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});
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}
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});
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}
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} else if (forbiddenImports.hasOwnProperty(requiredModuleName)) {
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// ex: const indexOf = require('lodash.indexof');
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// ex: const indexOf = require('lodash/indexOf');
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context.report({
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node,
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message: `require('${requiredModuleName}') detected. Consider using the native ${alternative}`
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});
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}
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} else if ((objectName === '_' || objectName === 'lodash' || objectName === 'underscore') && callee.property && callee.property.name === rule) {
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context.report({
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node,
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message: `Consider using the native ${alternative}`
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});
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}
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},
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ImportDeclaration(node) {
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if (forbiddenLibs.includes(node.source.value)) {
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// ex: import { indexOf } from 'lodash';
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// ex: import { indexOf as x } from 'lodash';
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node.specifiers.forEach(specifier => {
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if (specifier.type === 'ImportSpecifier' && specifier.imported.name === rule) {
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context.report({
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node,
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message: `Import { ${rule} } from '${node.source.value}' detected. Consider using the native ${alternative}`
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});
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}
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});
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} else if (forbiddenImports.hasOwnProperty(node.source.value)) {
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// ex: import indexOf from 'lodash/indexOf';
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// ex: import indexOf from 'lodash.indexof';
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context.report({
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node,
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message: `Import from '${node.source.value}' detected. Consider using the native ${alternative}`
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});
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}
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}
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};
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}
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};
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}
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