Current Dev State

static/js/ketcher2/node_modules/eslint/lib/config/config-ops.js

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+/**
+ * @fileoverview Config file operations. This file must be usable in the browser,
+ * so no Node-specific code can be here.
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const Environments = require("./environments");
+
+const debug = require("debug")("eslint:config-ops");
+
+//------------------------------------------------------------------------------
+// Private
+//------------------------------------------------------------------------------
+
+const RULE_SEVERITY_STRINGS = ["off", "warn", "error"],
+    RULE_SEVERITY = RULE_SEVERITY_STRINGS.reduce((map, value, index) => {
+        map[value] = index;
+        return map;
+    }, {}),
+    VALID_SEVERITIES = [0, 1, 2, "off", "warn", "error"];
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+module.exports = {
+
+    /**
+     * Creates an empty configuration object suitable for merging as a base.
+     * @returns {Object} A configuration object.
+     */
+    createEmptyConfig() {
+        return {
+            globals: {},
+            env: {},
+            rules: {},
+            parserOptions: {}
+        };
+    },
+
+    /**
+     * Creates an environment config based on the specified environments.
+     * @param {Object<string,boolean>} env The environment settings.
+     * @returns {Object} A configuration object with the appropriate rules and globals
+     *      set.
+     */
+    createEnvironmentConfig(env) {
+
+        const envConfig = this.createEmptyConfig();
+
+        if (env) {
+
+            envConfig.env = env;
+
+            Object.keys(env).filter(name => env[name]).forEach(name => {
+                const environment = Environments.get(name);
+
+                if (environment) {
+                    debug(`Creating config for environment ${name}`);
+                    if (environment.globals) {
+                        Object.assign(envConfig.globals, environment.globals);
+                    }
+
+                    if (environment.parserOptions) {
+                        Object.assign(envConfig.parserOptions, environment.parserOptions);
+                    }
+                }
+            });
+        }
+
+        return envConfig;
+    },
+
+    /**
+     * Given a config with environment settings, applies the globals and
+     * ecmaFeatures to the configuration and returns the result.
+     * @param {Object} config The configuration information.
+     * @returns {Object} The updated configuration information.
+     */
+    applyEnvironments(config) {
+        if (config.env && typeof config.env === "object") {
+            debug("Apply environment settings to config");
+            return this.merge(this.createEnvironmentConfig(config.env), config);
+        }
+
+        return config;
+    },
+
+    /**
+     * Merges two config objects. This will not only add missing keys, but will also modify values to match.
+     * @param {Object} target config object
+     * @param {Object} src config object. Overrides in this config object will take priority over base.
+     * @param {boolean} [combine] Whether to combine arrays or not
+     * @param {boolean} [isRule] Whether its a rule
+     * @returns {Object} merged config object.
+     */
+    merge: function deepmerge(target, src, combine, isRule) {
+
+        /*
+         The MIT License (MIT)
+
+         Copyright (c) 2012 Nicholas Fisher
+
+         Permission is hereby granted, free of charge, to any person obtaining a copy
+         of this software and associated documentation files (the "Software"), to deal
+         in the Software without restriction, including without limitation the rights
+         to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+         copies of the Software, and to permit persons to whom the Software is
+         furnished to do so, subject to the following conditions:
+
+         The above copyright notice and this permission notice shall be included in
+         all copies or substantial portions of the Software.
+
+         THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+         IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+         FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+         AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+         LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+         OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+         THE SOFTWARE.
+         */
+
+        /*
+         * This code is taken from deepmerge repo
+         * (https://github.com/KyleAMathews/deepmerge)
+         * and modified to meet our needs.
+         */
+        const array = Array.isArray(src) || Array.isArray(target);
+        let dst = array && [] || {};
+
+        combine = !!combine;
+        isRule = !!isRule;
+        if (array) {
+            target = target || [];
+
+            // src could be a string, so check for array
+            if (isRule && Array.isArray(src) && src.length > 1) {
+                dst = dst.concat(src);
+            } else {
+                dst = dst.concat(target);
+            }
+            if (typeof src !== "object" && !Array.isArray(src)) {
+                src = [src];
+            }
+            Object.keys(src).forEach((e, i) => {
+                e = src[i];
+                if (typeof dst[i] === "undefined") {
+                    dst[i] = e;
+                } else if (typeof e === "object") {
+                    if (isRule) {
+                        dst[i] = e;
+                    } else {
+                        dst[i] = deepmerge(target[i], e, combine, isRule);
+                    }
+                } else {
+                    if (!combine) {
+                        dst[i] = e;
+                    } else {
+                        if (dst.indexOf(e) === -1) {
+                            dst.push(e);
+                        }
+                    }
+                }
+            });
+        } else {
+            if (target && typeof target === "object") {
+                Object.keys(target).forEach(key => {
+                    dst[key] = target[key];
+                });
+            }
+            Object.keys(src).forEach(key => {
+                if (Array.isArray(src[key]) || Array.isArray(target[key])) {
+                    dst[key] = deepmerge(target[key], src[key], key === "plugins", isRule);
+                } else if (typeof src[key] !== "object" || !src[key] || key === "exported" || key === "astGlobals") {
+                    dst[key] = src[key];
+                } else {
+                    dst[key] = deepmerge(target[key] || {}, src[key], combine, key === "rules");
+                }
+            });
+        }
+
+        return dst;
+    },
+
+    /**
+     * Converts new-style severity settings (off, warn, error) into old-style
+     * severity settings (0, 1, 2) for all rules. Assumption is that severity
+     * values have already been validated as correct.
+     * @param {Object} config The config object to normalize.
+     * @returns {void}
+     */
+    normalize(config) {
+
+        if (config.rules) {
+            Object.keys(config.rules).forEach(ruleId => {
+                const ruleConfig = config.rules[ruleId];
+
+                if (typeof ruleConfig === "string") {
+                    config.rules[ruleId] = RULE_SEVERITY[ruleConfig.toLowerCase()] || 0;
+                } else if (Array.isArray(ruleConfig) && typeof ruleConfig[0] === "string") {
+                    ruleConfig[0] = RULE_SEVERITY[ruleConfig[0].toLowerCase()] || 0;
+                }
+            });
+        }
+    },
+
+    /**
+     * Converts old-style severity settings (0, 1, 2) into new-style
+     * severity settings (off, warn, error) for all rules. Assumption is that severity
+     * values have already been validated as correct.
+     * @param {Object} config The config object to normalize.
+     * @returns {void}
+     */
+    normalizeToStrings(config) {
+
+        if (config.rules) {
+            Object.keys(config.rules).forEach(ruleId => {
+                const ruleConfig = config.rules[ruleId];
+
+                if (typeof ruleConfig === "number") {
+                    config.rules[ruleId] = RULE_SEVERITY_STRINGS[ruleConfig] || RULE_SEVERITY_STRINGS[0];
+                } else if (Array.isArray(ruleConfig) && typeof ruleConfig[0] === "number") {
+                    ruleConfig[0] = RULE_SEVERITY_STRINGS[ruleConfig[0]] || RULE_SEVERITY_STRINGS[0];
+                }
+            });
+        }
+    },
+
+    /**
+     * Determines if the severity for the given rule configuration represents an error.
+     * @param {int|string|Array} ruleConfig The configuration for an individual rule.
+     * @returns {boolean} True if the rule represents an error, false if not.
+     */
+    isErrorSeverity(ruleConfig) {
+
+        let severity = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
+
+        if (typeof severity === "string") {
+            severity = RULE_SEVERITY[severity.toLowerCase()] || 0;
+        }
+
+        return (typeof severity === "number" && severity === 2);
+    },
+
+    /**
+     * Checks whether a given config has valid severity or not.
+     * @param {number|string|Array} ruleConfig - The configuration for an individual rule.
+     * @returns {boolean} `true` if the configuration has valid severity.
+     */
+    isValidSeverity(ruleConfig) {
+        let severity = Array.isArray(ruleConfig) ? ruleConfig[0] : ruleConfig;
+
+        if (typeof severity === "string") {
+            severity = severity.toLowerCase();
+        }
+        return VALID_SEVERITIES.indexOf(severity) !== -1;
+    },
+
+    /**
+     * Checks whether every rule of a given config has valid severity or not.
+     * @param {Object} config - The configuration for rules.
+     * @returns {boolean} `true` if the configuration has valid severity.
+     */
+    isEverySeverityValid(config) {
+        return Object.keys(config).every(ruleId => this.isValidSeverity(config[ruleId]));
+    }
+};