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, 38 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/lodash/_createMathOperation.js b/tools/node_modules/eslint/node_modules/lodash/_createMathOperation.js
new file mode 100644
index 0000000000..f1e238ac0a
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/lodash/_createMathOperation.js
@@ -0,0 +1,38 @@
+var baseToNumber = require('./_baseToNumber'),
+    baseToString = require('./_baseToString');
+
+/**
+ * Creates a function that performs a mathematical operation on two values.
+ *
+ * @private
+ * @param {Function} operator The function to perform the operation.
+ * @param {number} [defaultValue] The value used for `undefined` arguments.
+ * @returns {Function} Returns the new mathematical operation function.
+ */
+function createMathOperation(operator, defaultValue) {
+  return function(value, other) {
+    var result;
+    if (value === undefined && other === undefined) {
+      return defaultValue;
+    }
+    if (value !== undefined) {
+      result = value;
+    }
+    if (other !== undefined) {
+      if (result === undefined) {
+        return other;
+      }
+      if (typeof value == 'string' || typeof other == 'string') {
+        value = baseToString(value);
+        other = baseToString(other);
+      } else {
+        value = baseToNumber(value);
+        other = baseToNumber(other);
+      }
+      result = operator(value, other);
+    }
+    return result;
+  };
+}
+
+module.exports = createMathOperation;