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, 29 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/lib/util/ajv.js b/tools/node_modules/eslint/lib/util/ajv.js
new file mode 100644
index 0000000000..f9e8b98535
--- /dev/null
+++ b/tools/node_modules/eslint/lib/util/ajv.js
@@ -0,0 +1,29 @@
+/**
+ * @fileoverview The instance of Ajv validator.
+ * @author Evgeny Poberezkin
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const Ajv = require("ajv"),
+    metaSchema = require("ajv/lib/refs/json-schema-draft-04.json");
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+const ajv = new Ajv({
+    meta: false,
+    validateSchema: false,
+    missingRefs: "ignore",
+    verbose: true
+});
+
+ajv.addMetaSchema(metaSchema);
+// eslint-disable-next-line no-underscore-dangle
+ajv._opts.defaultMeta = metaSchema.id;
+
+module.exports = ajv;