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, 84 insertions, 0 deletions

diff --git a/tools/node_modules/eslint/lib/config/environments.js b/tools/node_modules/eslint/lib/config/environments.js
new file mode 100644
index 0000000000..1ec9438af5
--- /dev/null
+++ b/tools/node_modules/eslint/lib/config/environments.js
@@ -0,0 +1,84 @@
+/**
+ * @fileoverview Environments manager
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const envs = require("../../conf/environments");
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+class Environments {
+
+    /**
+     * create env context
+     */
+    constructor() {
+        this._environments = new Map();
+
+        this.load();
+    }
+
+    /**
+     * Loads the default environments.
+     * @returns {void}
+     * @private
+     */
+    load() {
+        Object.keys(envs).forEach(envName => {
+            this._environments.set(envName, envs[envName]);
+        });
+    }
+
+    /**
+     * Gets the environment with the given name.
+     * @param {string} name The name of the environment to retrieve.
+     * @returns {Object?} The environment object or null if not found.
+     */
+    get(name) {
+        return this._environments.get(name) || null;
+    }
+
+    /**
+     * Gets all the environment present
+     * @returns {Object} The environment object for each env name
+     */
+    getAll() {
+        return Array.from(this._environments).reduce((coll, env) => {
+            coll[env[0]] = env[1];
+            return coll;
+        }, {});
+    }
+
+    /**
+     * Defines an environment.
+     * @param {string} name The name of the environment.
+     * @param {Object} env The environment settings.
+     * @returns {void}
+     */
+    define(name, env) {
+        this._environments.set(name, env);
+    }
+
+    /**
+     * Imports all environments from a plugin.
+     * @param {Object} plugin The plugin object.
+     * @param {string} pluginName The name of the plugin.
+     * @returns {void}
+     */
+    importPlugin(plugin, pluginName) {
+        if (plugin.environments) {
+            Object.keys(plugin.environments).forEach(envName => {
+                this.define(`${pluginName}/${envName}`, plugin.environments[envName]);
+            });
+        }
+    }
+}
+
+module.exports = Environments;