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, 50 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/unist-util-stringify-position/index.js b/tools/node_modules/eslint/node_modules/unist-util-stringify-position/index.js
new file mode 100644
index 0000000000..bf8ac832b0
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/unist-util-stringify-position/index.js
@@ -0,0 +1,50 @@
+'use strict';
+
+var own = {}.hasOwnProperty;
+
+module.exports = stringify;
+
+function stringify(value) {
+  /* Nothing. */
+  if (!value || typeof value !== 'object') {
+    return null;
+  }
+
+  /* Node. */
+  if (own.call(value, 'position') || own.call(value, 'type')) {
+    return location(value.position);
+  }
+
+  /* Location. */
+  if (own.call(value, 'start') || own.call(value, 'end')) {
+    return location(value);
+  }
+
+  /* Position. */
+  if (own.call(value, 'line') || own.call(value, 'column')) {
+    return position(value);
+  }
+
+  /* ? */
+  return null;
+}
+
+function position(pos) {
+  if (!pos || typeof pos !== 'object') {
+    pos = {};
+  }
+
+  return index(pos.line) + ':' + index(pos.column);
+}
+
+function location(loc) {
+  if (!loc || typeof loc !== 'object') {
+    loc = {};
+  }
+
+  return position(loc.start) + '-' + position(loc.end);
+}
+
+function index(value) {
+  return value && typeof value === 'number' ? value : 1;
+}