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, 37 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/lib/rules/no-template-curly-in-string.js b/tools/node_modules/eslint/lib/rules/no-template-curly-in-string.js
new file mode 100644
index 0000000000..d8f6c31108
--- /dev/null
+++ b/tools/node_modules/eslint/lib/rules/no-template-curly-in-string.js
@@ -0,0 +1,37 @@
+/**
+ * @fileoverview Warn when using template string syntax in regular strings
+ * @author Jeroen Engels
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow template literal placeholder syntax in regular strings",
+            category: "Possible Errors",
+            recommended: false
+        },
+
+        schema: []
+    },
+
+    create(context) {
+        const regex = /\$\{[^}]+\}/;
+
+        return {
+            Literal(node) {
+                if (typeof node.value === "string" && regex.test(node.value)) {
+                    context.report({
+                        node,
+                        message: "Unexpected template string expression."
+                    });
+                }
+            }
+        };
+
+    }
+};