87 lines
2.5 KiB
Plaintext
87 lines
2.5 KiB
Plaintext
/**
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* @author Toru Nagashima <https://github.com/mysticatea>
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* See LICENSE file in root directory for full license.
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*/
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"use strict"
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const { findVariable } = require("@eslint-community/eslint-utils")
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const { getScope } = require("../util/eslint-compat")
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/**
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* @param {import('estree').Node} node
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* @param {import('eslint').Scope.Scope} scope
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* @returns {boolean}
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*/
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function isExports(node, scope) {
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let variable = null
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return (
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node != null &&
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node.type === "Identifier" &&
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node.name === "exports" &&
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(variable = findVariable(scope, node)) != null &&
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variable.scope.type === "global"
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)
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}
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/**
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* @param {import('estree').Node} node
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* @param {import('eslint').Scope.Scope} scope
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* @returns {boolean}
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*/
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function isModuleExports(node, scope) {
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let variable = null
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return (
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node != null &&
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node.type === "MemberExpression" &&
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!node.computed &&
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node.object.type === "Identifier" &&
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node.object.name === "module" &&
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node.property.type === "Identifier" &&
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node.property.name === "exports" &&
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(variable = findVariable(scope, node.object)) != null &&
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variable.scope.type === "global"
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)
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}
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/** @type {import('./rule-module').RuleModule} */
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module.exports = {
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meta: {
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docs: {
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description: "disallow the assignment to `exports`",
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recommended: true,
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url: "https://github.com/eslint-community/eslint-plugin-n/blob/HEAD/docs/rules/no-exports-assign.md",
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},
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fixable: null,
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messages: {
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forbidden:
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"Unexpected assignment to 'exports' variable. Use 'module.exports' instead.",
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},
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schema: [],
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type: "problem",
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},
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create(context) {
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return {
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AssignmentExpression(node) {
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const scope = getScope(context)
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if (
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!isExports(node.left, scope) ||
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// module.exports = exports = {}
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(node.parent.type === "AssignmentExpression" &&
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node.parent.right === node &&
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isModuleExports(node.parent.left, scope)) ||
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// exports = module.exports = {}
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(node.right.type === "AssignmentExpression" &&
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isModuleExports(node.right.left, scope))
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) {
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return
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}
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context.report({ node, messageId: "forbidden" })
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},
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}
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},
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}
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