tools: move eslint from tools to tools/node_modules

This is required because we need to add the babel-eslint dependency
and it has to be able to resolve "eslint".
babel-eslint is required to support future ES features such as async
iterators and import.meta.

Refs: https://github.com/nodejs/node/pull/17755
PR-URL: https://github.com/nodejs/node/pull/17820
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/lib/rules/no-prototype-builtins.js b/tools/node_modules/eslint/lib/rules/no-prototype-builtins.js
new file mode 100644
index 0000000000..b9f040eaf6
--- /dev/null
+++ b/tools/node_modules/eslint/lib/rules/no-prototype-builtins.js
@@ -0,0 +1,54 @@
+/**
+ * @fileoverview Rule to disallow use of Object.prototype builtins on objects
+ * @author Andrew Levine
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow calling some `Object.prototype` methods directly on objects",
+            category: "Possible Errors",
+            recommended: false
+        },
+
+        schema: []
+    },
+
+    create(context) {
+        const DISALLOWED_PROPS = [
+            "hasOwnProperty",
+            "isPrototypeOf",
+            "propertyIsEnumerable"
+        ];
+
+        /**
+         * Reports if a disallowed property is used in a CallExpression
+         * @param {ASTNode} node The CallExpression node.
+         * @returns {void}
+         */
+        function disallowBuiltIns(node) {
+            if (node.callee.type !== "MemberExpression" || node.callee.computed) {
+                return;
+            }
+            const propName = node.callee.property.name;
+
+            if (DISALLOWED_PROPS.indexOf(propName) > -1) {
+                context.report({
+                    message: "Do not access Object.prototype method '{{prop}}' from target object.",
+                    loc: node.callee.property.loc.start,
+                    data: { prop: propName },
+                    node
+                });
+            }
+        }
+
+        return {
+            CallExpression: disallowBuiltIns
+        };
+    }
+};