Save current BZZZ config-ui state before CHORUS branding update

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install/config-ui/node_modules/eslint/lib/rules/no-mixed-requires.js

@@ -0,0 +1,238 @@
+/**
+ * @fileoverview Rule to enforce grouped require statements for Node.JS
+ * @author Raphael Pigulla
+ * @deprecated in ESLint v7.0.0
+ */
+
+"use strict";
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../shared/types').Rule} */
+module.exports = {
+    meta: {
+        deprecated: true,
+
+        replacedBy: [],
+
+        type: "suggestion",
+
+        docs: {
+            description: "Disallow `require` calls to be mixed with regular variable declarations",
+            recommended: false,
+            url: "https://eslint.org/docs/latest/rules/no-mixed-requires"
+        },
+
+        schema: [
+            {
+                oneOf: [
+                    {
+                        type: "boolean"
+                    },
+                    {
+                        type: "object",
+                        properties: {
+                            grouping: {
+                                type: "boolean"
+                            },
+                            allowCall: {
+                                type: "boolean"
+                            }
+                        },
+                        additionalProperties: false
+                    }
+                ]
+            }
+        ],
+
+        messages: {
+            noMixRequire: "Do not mix 'require' and other declarations.",
+            noMixCoreModuleFileComputed: "Do not mix core, module, file and computed requires."
+        }
+    },
+
+    create(context) {
+
+        const options = context.options[0];
+        let grouping = false,
+            allowCall = false;
+
+        if (typeof options === "object") {
+            grouping = options.grouping;
+            allowCall = options.allowCall;
+        } else {
+            grouping = !!options;
+        }
+
+        /**
+         * Returns the list of built-in modules.
+         * @returns {string[]} An array of built-in Node.js modules.
+         */
+        function getBuiltinModules() {
+
+            /*
+             * This list is generated using:
+             * `require("repl")._builtinLibs.concat('repl').sort()`
+             * This particular list is as per nodejs v0.12.2 and iojs v0.7.1
+             */
+            return [
+                "assert", "buffer", "child_process", "cluster", "crypto",
+                "dgram", "dns", "domain", "events", "fs", "http", "https",
+                "net", "os", "path", "punycode", "querystring", "readline",
+                "repl", "smalloc", "stream", "string_decoder", "tls", "tty",
+                "url", "util", "v8", "vm", "zlib"
+            ];
+        }
+
+        const BUILTIN_MODULES = getBuiltinModules();
+
+        const DECL_REQUIRE = "require",
+            DECL_UNINITIALIZED = "uninitialized",
+            DECL_OTHER = "other";
+
+        const REQ_CORE = "core",
+            REQ_FILE = "file",
+            REQ_MODULE = "module",
+            REQ_COMPUTED = "computed";
+
+        /**
+         * Determines the type of a declaration statement.
+         * @param {ASTNode} initExpression The init node of the VariableDeclarator.
+         * @returns {string} The type of declaration represented by the expression.
+         */
+        function getDeclarationType(initExpression) {
+            if (!initExpression) {
+
+                // "var x;"
+                return DECL_UNINITIALIZED;
+            }
+
+            if (initExpression.type === "CallExpression" &&
+                initExpression.callee.type === "Identifier" &&
+                initExpression.callee.name === "require"
+            ) {
+
+                // "var x = require('util');"
+                return DECL_REQUIRE;
+            }
+            if (allowCall &&
+                initExpression.type === "CallExpression" &&
+                initExpression.callee.type === "CallExpression"
+            ) {
+
+                // "var x = require('diagnose')('sub-module');"
+                return getDeclarationType(initExpression.callee);
+            }
+            if (initExpression.type === "MemberExpression") {
+
+                // "var x = require('glob').Glob;"
+                return getDeclarationType(initExpression.object);
+            }
+
+            // "var x = 42;"
+            return DECL_OTHER;
+        }
+
+        /**
+         * Determines the type of module that is loaded via require.
+         * @param {ASTNode} initExpression The init node of the VariableDeclarator.
+         * @returns {string} The module type.
+         */
+        function inferModuleType(initExpression) {
+            if (initExpression.type === "MemberExpression") {
+
+                // "var x = require('glob').Glob;"
+                return inferModuleType(initExpression.object);
+            }
+            if (initExpression.arguments.length === 0) {
+
+                // "var x = require();"
+                return REQ_COMPUTED;
+            }
+
+            const arg = initExpression.arguments[0];
+
+            if (arg.type !== "Literal" || typeof arg.value !== "string") {
+
+                // "var x = require(42);"
+                return REQ_COMPUTED;
+            }
+
+            if (BUILTIN_MODULES.includes(arg.value)) {
+
+                // "var fs = require('fs');"
+                return REQ_CORE;
+            }
+            if (/^\.{0,2}\//u.test(arg.value)) {
+
+                // "var utils = require('./utils');"
+                return REQ_FILE;
+            }
+
+            // "var async = require('async');"
+            return REQ_MODULE;
+
+        }
+
+        /**
+         * Check if the list of variable declarations is mixed, i.e. whether it
+         * contains both require and other declarations.
+         * @param {ASTNode} declarations The list of VariableDeclarators.
+         * @returns {boolean} True if the declarations are mixed, false if not.
+         */
+        function isMixed(declarations) {
+            const contains = {};
+
+            declarations.forEach(declaration => {
+                const type = getDeclarationType(declaration.init);
+
+                contains[type] = true;
+            });
+
+            return !!(
+                contains[DECL_REQUIRE] &&
+                (contains[DECL_UNINITIALIZED] || contains[DECL_OTHER])
+            );
+        }
+
+        /**
+         * Check if all require declarations in the given list are of the same
+         * type.
+         * @param {ASTNode} declarations The list of VariableDeclarators.
+         * @returns {boolean} True if the declarations are grouped, false if not.
+         */
+        function isGrouped(declarations) {
+            const found = {};
+
+            declarations.forEach(declaration => {
+                if (getDeclarationType(declaration.init) === DECL_REQUIRE) {
+                    found[inferModuleType(declaration.init)] = true;
+                }
+            });
+
+            return Object.keys(found).length <= 1;
+        }
+
+
+        return {
+
+            VariableDeclaration(node) {
+
+                if (isMixed(node.declarations)) {
+                    context.report({
+                        node,
+                        messageId: "noMixRequire"
+                    });
+                } else if (grouping && !isGrouped(node.declarations)) {
+                    context.report({
+                        node,
+                        messageId: "noMixCoreModuleFileComputed"
+                    });
+                }
+            }
+        };
+
+    }
+};