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, 26 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/esquery/README.md b/tools/node_modules/eslint/node_modules/esquery/README.md
new file mode 100644
index 0000000000..a3ee33479d
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+++ b/tools/node_modules/eslint/node_modules/esquery/README.md
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+ESQuery is a library for querying the AST output by Esprima for patterns of syntax using a CSS style selector system. Check out the demo:
+
+[demo](https://estools.github.io/esquery/)
+
+The following selectors are supported:
+* AST node type: `ForStatement`
+* [wildcard](http://dev.w3.org/csswg/selectors4/#universal-selector): `*`
+* [attribute existence](http://dev.w3.org/csswg/selectors4/#attribute-selectors): `[attr]`
+* [attribute value](http://dev.w3.org/csswg/selectors4/#attribute-selectors): `[attr="foo"]` or `[attr=123]`
+* attribute regex: `[attr=/foo.*/]`
+* attribute conditons: `[attr!="foo"]`, `[attr>2]`, `[attr<3]`, `[attr>=2]`, or `[attr<=3]` 
+* nested attribute: `[attr.level2="foo"]`
+* field: `FunctionDeclaration > Identifier.id`
+* [First](http://dev.w3.org/csswg/selectors4/#the-first-child-pseudo) or [last](http://dev.w3.org/csswg/selectors4/#the-last-child-pseudo) child: `:first-child` or `:last-child`
+* [nth-child](http://dev.w3.org/csswg/selectors4/#the-nth-child-pseudo) (no ax+b support): `:nth-child(2)`
+* [nth-last-child](http://dev.w3.org/csswg/selectors4/#the-nth-last-child-pseudo) (no ax+b support): `:nth-last-child(1)`
+* [descendant](http://dev.w3.org/csswg/selectors4/#descendant-combinators): `ancestor descendant`
+* [child](http://dev.w3.org/csswg/selectors4/#child-combinators): `parent > child`
+* [following sibling](http://dev.w3.org/csswg/selectors4/#general-sibling-combinators): `node ~ sibling`
+* [adjacent sibling](http://dev.w3.org/csswg/selectors4/#adjacent-sibling-combinators): `node + adjacent`
+* [negation](http://dev.w3.org/csswg/selectors4/#negation-pseudo): `:not(ForStatement)`
+* [matches-any](http://dev.w3.org/csswg/selectors4/#matches): `:matches([attr] > :first-child, :last-child)`
+* [subject indicator](http://dev.w3.org/csswg/selectors4/#subject): `!IfStatement > [name="foo"]`
+* class of AST node: `:statement`, `:expression`, `:declaration`, `:function`, or `:pattern`
+
+[![Build Status](https://travis-ci.org/estools/esquery.png?branch=master)](https://travis-ci.org/estools/esquery)