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, 57 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/ajv-keywords/keywords/deepRequired.js b/tools/node_modules/eslint/node_modules/ajv-keywords/keywords/deepRequired.js
new file mode 100644
index 0000000000..29e8ab5600
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/ajv-keywords/keywords/deepRequired.js
@@ -0,0 +1,57 @@
+'use strict';
+
+module.exports = function defFunc(ajv) {
+  defFunc.definition = {
+    type: 'object',
+    inline: function (it, keyword, schema) {
+      var expr = '';
+      for (var i=0; i<schema.length; i++) {
+        if (i) expr += ' && ';
+        expr += '(' + getData(schema[i], it.dataLevel) + ' !== undefined)';
+      }
+      return expr;
+    },
+    metaSchema: {
+      type: 'array',
+      items: {
+        type: 'string',
+        format: 'json-pointer'
+      }
+    }
+  };
+
+  ajv.addKeyword('deepRequired', defFunc.definition);
+  return ajv;
+};
+
+
+function getData(jsonPointer, lvl) {
+  var data = 'data' + (lvl || '');
+  if (!jsonPointer) return data;
+
+  var expr = data;
+  var segments = jsonPointer.split('/');
+  for (var i=1; i<segments.length; i++) {
+    var segment = segments[i];
+    data += getProperty(unescapeJsonPointer(segment));
+    expr += ' && ' + data;
+  }
+  return expr;
+}
+
+
+var IDENTIFIER = /^[a-z$_][a-z$_0-9]*$/i;
+var INTEGER = /^[0-9]+$/;
+var SINGLE_QUOTE = /'|\\/g;
+function getProperty(key) {
+  return INTEGER.test(key)
+          ? '[' + key + ']'
+          : IDENTIFIER.test(key)
+            ? '.' + key
+            : "['" + key.replace(SINGLE_QUOTE, '\\$&') + "']";
+}
+
+
+function unescapeJsonPointer(str) {
+  return str.replace(/~1/g, '/').replace(/~0/g, '~');
+}