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, 0 insertions, 160 deletions

diff --git a/tools/eslint/lib/rules/no-empty-function.js b/tools/eslint/lib/rules/no-empty-function.js
deleted file mode 100644
index 38c915c33f..0000000000
--- a/tools/eslint/lib/rules/no-empty-function.js
+++ /dev/null
@@ -1,160 +0,0 @@
-/**
- * @fileoverview Rule to disallow empty functions.
- * @author Toru Nagashima
- */
-
-"use strict";
-
-//------------------------------------------------------------------------------
-// Requirements
-//------------------------------------------------------------------------------
-
-const astUtils = require("../ast-utils");
-
-//------------------------------------------------------------------------------
-// Helpers
-//------------------------------------------------------------------------------
-
-const ALLOW_OPTIONS = Object.freeze([
-    "functions",
-    "arrowFunctions",
-    "generatorFunctions",
-    "methods",
-    "generatorMethods",
-    "getters",
-    "setters",
-    "constructors"
-]);
-
-/**
- * Gets the kind of a given function node.
- *
- * @param {ASTNode} node - A function node to get. This is one of
- *      an ArrowFunctionExpression, a FunctionDeclaration, or a
- *      FunctionExpression.
- * @returns {string} The kind of the function. This is one of "functions",
- *      "arrowFunctions", "generatorFunctions", "asyncFunctions", "methods",
- *      "generatorMethods", "asyncMethods", "getters", "setters", and
- *      "constructors".
- */
-function getKind(node) {
-    const parent = node.parent;
-    let kind = "";
-
-    if (node.type === "ArrowFunctionExpression") {
-        return "arrowFunctions";
-    }
-
-    // Detects main kind.
-    if (parent.type === "Property") {
-        if (parent.kind === "get") {
-            return "getters";
-        }
-        if (parent.kind === "set") {
-            return "setters";
-        }
-        kind = parent.method ? "methods" : "functions";
-
-    } else if (parent.type === "MethodDefinition") {
-        if (parent.kind === "get") {
-            return "getters";
-        }
-        if (parent.kind === "set") {
-            return "setters";
-        }
-        if (parent.kind === "constructor") {
-            return "constructors";
-        }
-        kind = "methods";
-
-    } else {
-        kind = "functions";
-    }
-
-    // Detects prefix.
-    let prefix = "";
-
-    if (node.generator) {
-        prefix = "generator";
-    } else if (node.async) {
-        prefix = "async";
-    } else {
-        return kind;
-    }
-    return prefix + kind[0].toUpperCase() + kind.slice(1);
-}
-
-//------------------------------------------------------------------------------
-// Rule Definition
-//------------------------------------------------------------------------------
-
-module.exports = {
-    meta: {
-        docs: {
-            description: "disallow empty functions",
-            category: "Best Practices",
-            recommended: false
-        },
-
-        schema: [
-            {
-                type: "object",
-                properties: {
-                    allow: {
-                        type: "array",
-                        items: { enum: ALLOW_OPTIONS },
-                        uniqueItems: true
-                    }
-                },
-                additionalProperties: false
-            }
-        ]
-    },
-
-    create(context) {
-        const options = context.options[0] || {};
-        const allowed = options.allow || [];
-
-        const sourceCode = context.getSourceCode();
-
-        /**
-         * Reports a given function node if the node matches the following patterns.
-         *
-         * - Not allowed by options.
-         * - The body is empty.
-         * - The body doesn't have any comments.
-         *
-         * @param {ASTNode} node - A function node to report. This is one of
-         *      an ArrowFunctionExpression, a FunctionDeclaration, or a
-         *      FunctionExpression.
-         * @returns {void}
-         */
-        function reportIfEmpty(node) {
-            const kind = getKind(node);
-            const name = astUtils.getFunctionNameWithKind(node);
-            const innerComments = sourceCode.getTokens(node.body, {
-                includeComments: true,
-                filter: astUtils.isCommentToken
-            });
-
-            if (allowed.indexOf(kind) === -1 &&
-                node.body.type === "BlockStatement" &&
-                node.body.body.length === 0 &&
-                innerComments.length === 0
-            ) {
-                context.report({
-                    node,
-                    loc: node.body.loc.start,
-                    message: "Unexpected empty {{name}}.",
-                    data: { name }
-                });
-            }
-        }
-
-        return {
-            ArrowFunctionExpression: reportIfEmpty,
-            FunctionDeclaration: reportIfEmpty,
-            FunctionExpression: reportIfEmpty
-        };
-    }
-};