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/node_modules/require-uncached/index.js b/tools/node_modules/eslint/node_modules/require-uncached/index.js
new file mode 100644
index 0000000000..63dfada3ec
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/require-uncached/index.js
@@ -0,0 +1,29 @@
+'use strict';
+var path = require('path');
+var resolveFrom = require('resolve-from');
+var callerPath = require('caller-path');
+
+module.exports = function (moduleId) {
+	if (typeof moduleId !== 'string') {
+		throw new TypeError('Expected a string');
+	}
+
+	var filePath = resolveFrom(path.dirname(callerPath()), moduleId);
+
+	// delete itself from module parent
+	if (require.cache[filePath] && require.cache[filePath].parent) {
+		var i = require.cache[filePath].parent.children.length;
+
+		while (i--) {
+			if (require.cache[filePath].parent.children[i].id === filePath) {
+				require.cache[filePath].parent.children.splice(i, 1);
+			}
+		}
+	}
+
+	// delete module from cache
+	delete require.cache[filePath];
+
+	// return fresh module
+	return require(filePath);
+};