ags

home/ags/node_modules/eslint-plugin-n/lib/rules/no-exports-assign.js

@@ -0,0 +1,76 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */
+"use strict"
+
+const { findVariable } = require("@eslint-community/eslint-utils")
+
+function isExports(node, scope) {
+    let variable = null
+
+    return (
+        node != null &&
+        node.type === "Identifier" &&
+        node.name === "exports" &&
+        (variable = findVariable(scope, node)) != null &&
+        variable.scope.type === "global"
+    )
+}
+
+function isModuleExports(node, scope) {
+    let variable = null
+
+    return (
+        node != null &&
+        node.type === "MemberExpression" &&
+        !node.computed &&
+        node.object.type === "Identifier" &&
+        node.object.name === "module" &&
+        node.property.type === "Identifier" &&
+        node.property.name === "exports" &&
+        (variable = findVariable(scope, node.object)) != null &&
+        variable.scope.type === "global"
+    )
+}
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow the assignment to `exports`",
+            recommended: true,
+            url: "https://github.com/eslint-community/eslint-plugin-n/blob/HEAD/docs/rules/no-exports-assign.md",
+        },
+        fixable: null,
+        messages: {
+            forbidden:
+                "Unexpected assignment to 'exports' variable. Use 'module.exports' instead.",
+        },
+        schema: [],
+        type: "problem",
+    },
+    create(context) {
+        const sourceCode = context.sourceCode ?? context.getSourceCode() // TODO: just use context.sourceCode when dropping eslint < v9
+
+        return {
+            AssignmentExpression(node) {
+                const scope = sourceCode.getScope?.(node) ?? context.getScope() //TODO: remove context.getScope() when dropping support for ESLint < v9
+
+                if (
+                    !isExports(node.left, scope) ||
+                    // module.exports = exports = {}
+                    (node.parent.type === "AssignmentExpression" &&
+                        node.parent.right === node &&
+                        isModuleExports(node.parent.left, scope)) ||
+                    // exports = module.exports = {}
+                    (node.right.type === "AssignmentExpression" &&
+                        isModuleExports(node.right.left, scope))
+                ) {
+                    return
+                }
+
+                context.report({ node, messageId: "forbidden" })
+            },
+        }
+    },
+}