1 | /**
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2 | * @fileoverview Defines a storage for rules.
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3 | * @author Nicholas C. Zakas
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4 | */
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5 |
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6 | ;
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7 |
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8 | //------------------------------------------------------------------------------
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9 | // Requirements
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10 | //------------------------------------------------------------------------------
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11 |
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12 | const loadRules = require("./load-rules");
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13 |
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14 | //------------------------------------------------------------------------------
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15 | // Privates
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16 | //------------------------------------------------------------------------------
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17 |
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18 | let rules = Object.create(null);
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19 |
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20 | //------------------------------------------------------------------------------
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21 | // Public Interface
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22 | //------------------------------------------------------------------------------
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23 |
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24 | /**
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25 | * Registers a rule module for rule id in storage.
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26 | * @param {string} ruleId Rule id (file name).
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27 | * @param {Function} ruleModule Rule handler.
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28 | * @returns {void}
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29 | */
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30 | function define(ruleId, ruleModule) {
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31 | rules[ruleId] = ruleModule;
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32 | }
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33 |
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34 | /**
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35 | * Loads and registers all rules from passed rules directory.
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36 | * @param {string} [rulesDir] Path to rules directory, may be relative. Defaults to `lib/rules`.
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37 | * @param {string} cwd Current working directory
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38 | * @returns {void}
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39 | */
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40 | function load(rulesDir, cwd) {
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41 | const newRules = loadRules(rulesDir, cwd);
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42 |
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43 | Object.keys(newRules).forEach(function(ruleId) {
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44 | define(ruleId, newRules[ruleId]);
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45 | });
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46 | }
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47 |
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48 | /**
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49 | * Registers all given rules of a plugin.
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50 | * @param {Object} plugin The plugin object to import.
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51 | * @param {string} pluginName The name of the plugin without prefix (`eslint-plugin-`).
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52 | * @returns {void}
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53 | */
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54 | function importPlugin(plugin, pluginName) {
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55 | if (plugin.rules) {
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56 | Object.keys(plugin.rules).forEach(function(ruleId) {
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57 | const qualifiedRuleId = pluginName + "/" + ruleId,
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58 | rule = plugin.rules[ruleId];
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59 |
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60 | define(qualifiedRuleId, rule);
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61 | });
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62 | }
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63 | }
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64 |
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65 | /**
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66 | * Access rule handler by id (file name).
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67 | * @param {string} ruleId Rule id (file name).
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68 | * @returns {Function} Rule handler.
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69 | */
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70 | function getHandler(ruleId) {
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71 | if (typeof rules[ruleId] === "string") {
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72 | return require(rules[ruleId]);
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73 | } else {
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74 | return rules[ruleId];
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75 | }
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76 | }
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77 |
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78 | /**
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79 | * Reset rules storage.
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80 | * Should be used only in tests.
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81 | * @returns {void}
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82 | */
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83 | function testClear() {
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84 | rules = Object.create(null);
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85 | }
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86 |
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87 | module.exports = {
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88 | define,
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89 | load,
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90 | importPlugin,
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91 | get: getHandler,
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92 | testClear,
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93 |
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94 | /**
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95 | * Resets rules to its starting state. Use for tests only.
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96 | * @returns {void}
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97 | */
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98 | testReset() {
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99 | testClear();
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100 | load();
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101 | }
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102 | };
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103 |
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104 | //------------------------------------------------------------------------------
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105 | // Initialization
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106 | //------------------------------------------------------------------------------
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107 |
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108 | // loads built-in rules
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109 | load();
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