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, 150 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/node_modules/remark-parse/lib/tokenize/heading-atx.js b/tools/node_modules/eslint/node_modules/remark-parse/lib/tokenize/heading-atx.js
new file mode 100644
index 0000000000..e5fdedc537
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/remark-parse/lib/tokenize/heading-atx.js
@@ -0,0 +1,150 @@
+/**
+ * @author Titus Wormer
+ * @copyright 2015 Titus Wormer
+ * @license MIT
+ * @module remark:parse:tokenize:heading-atx
+ * @fileoverview Tokenise an ATX-style heading.
+ */
+
+'use strict';
+
+module.exports = atxHeading;
+
+var C_NEWLINE = '\n';
+var C_TAB = '\t';
+var C_SPACE = ' ';
+var C_HASH = '#';
+
+var MAX_ATX_COUNT = 6;
+
+/* Tokenise an ATX-style heading. */
+function atxHeading(eat, value, silent) {
+  var self = this;
+  var settings = self.options;
+  var length = value.length + 1;
+  var index = -1;
+  var now = eat.now();
+  var subvalue = '';
+  var content = '';
+  var character;
+  var queue;
+  var depth;
+
+  /* Eat initial spacing. */
+  while (++index < length) {
+    character = value.charAt(index);
+
+    if (character !== C_SPACE && character !== C_TAB) {
+      index--;
+      break;
+    }
+
+    subvalue += character;
+  }
+
+  /* Eat hashes. */
+  depth = 0;
+
+  while (++index <= length) {
+    character = value.charAt(index);
+
+    if (character !== C_HASH) {
+      index--;
+      break;
+    }
+
+    subvalue += character;
+    depth++;
+  }
+
+  if (depth > MAX_ATX_COUNT) {
+    return;
+  }
+
+  if (
+    !depth ||
+    (!settings.pedantic && value.charAt(index + 1) === C_HASH)
+  ) {
+    return;
+  }
+
+  length = value.length + 1;
+
+  /* Eat intermediate white-space. */
+  queue = '';
+
+  while (++index < length) {
+    character = value.charAt(index);
+
+    if (character !== C_SPACE && character !== C_TAB) {
+      index--;
+      break;
+    }
+
+    queue += character;
+  }
+
+  /* Exit when not in pedantic mode without spacing. */
+  if (
+    !settings.pedantic &&
+    queue.length === 0 &&
+    character &&
+    character !== C_NEWLINE
+  ) {
+    return;
+  }
+
+  if (silent) {
+    return true;
+  }
+
+  /* Eat content. */
+  subvalue += queue;
+  queue = '';
+  content = '';
+
+  while (++index < length) {
+    character = value.charAt(index);
+
+    if (!character || character === C_NEWLINE) {
+      break;
+    }
+
+    if (
+      character !== C_SPACE &&
+      character !== C_TAB &&
+      character !== C_HASH
+    ) {
+      content += queue + character;
+      queue = '';
+      continue;
+    }
+
+    while (character === C_SPACE || character === C_TAB) {
+      queue += character;
+      character = value.charAt(++index);
+    }
+
+    while (character === C_HASH) {
+      queue += character;
+      character = value.charAt(++index);
+    }
+
+    while (character === C_SPACE || character === C_TAB) {
+      queue += character;
+      character = value.charAt(++index);
+    }
+
+    index--;
+  }
+
+  now.column += subvalue.length;
+  now.offset += subvalue.length;
+  subvalue += content + queue;
+
+  return eat(subvalue)({
+    type: 'heading',
+    depth: depth,
+    children: self.tokenizeInline(content, now)
+  });
+}