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, 70 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/strip-json-comments/index.js b/tools/node_modules/eslint/node_modules/strip-json-comments/index.js
new file mode 100644
index 0000000000..4e6576e6d3
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/strip-json-comments/index.js
@@ -0,0 +1,70 @@
+'use strict';
+var singleComment = 1;
+var multiComment = 2;
+
+function stripWithoutWhitespace() {
+	return '';
+}
+
+function stripWithWhitespace(str, start, end) {
+	return str.slice(start, end).replace(/\S/g, ' ');
+}
+
+module.exports = function (str, opts) {
+	opts = opts || {};
+
+	var currentChar;
+	var nextChar;
+	var insideString = false;
+	var insideComment = false;
+	var offset = 0;
+	var ret = '';
+	var strip = opts.whitespace === false ? stripWithoutWhitespace : stripWithWhitespace;
+
+	for (var i = 0; i < str.length; i++) {
+		currentChar = str[i];
+		nextChar = str[i + 1];
+
+		if (!insideComment && currentChar === '"') {
+			var escaped = str[i - 1] === '\\' && str[i - 2] !== '\\';
+			if (!escaped) {
+				insideString = !insideString;
+			}
+		}
+
+		if (insideString) {
+			continue;
+		}
+
+		if (!insideComment && currentChar + nextChar === '//') {
+			ret += str.slice(offset, i);
+			offset = i;
+			insideComment = singleComment;
+			i++;
+		} else if (insideComment === singleComment && currentChar + nextChar === '\r\n') {
+			i++;
+			insideComment = false;
+			ret += strip(str, offset, i);
+			offset = i;
+			continue;
+		} else if (insideComment === singleComment && currentChar === '\n') {
+			insideComment = false;
+			ret += strip(str, offset, i);
+			offset = i;
+		} else if (!insideComment && currentChar + nextChar === '/*') {
+			ret += str.slice(offset, i);
+			offset = i;
+			insideComment = multiComment;
+			i++;
+			continue;
+		} else if (insideComment === multiComment && currentChar + nextChar === '*/') {
+			i++;
+			insideComment = false;
+			ret += strip(str, offset, i + 1);
+			offset = i + 1;
+			continue;
+		}
+	}
+
+	return ret + (insideComment ? strip(str.substr(offset)) : str.substr(offset));
+};