1 | /**
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2 | * @fileoverview Main Linter Class
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3 | * @author Gyandeep Singh
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4 | * @author aladdin-add
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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 | //------------------------------------------------------------------------------
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10 | // Requirements
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11 | //------------------------------------------------------------------------------
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12 |
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13 | const
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14 | path = require("path"),
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15 | eslintScope = require("eslint-scope"),
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16 | evk = require("eslint-visitor-keys"),
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17 | espree = require("espree"),
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18 | lodash = require("lodash"),
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19 | BuiltInEnvironments = require("@eslint/eslintrc/conf/environments"),
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20 | pkg = require("../../package.json"),
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21 | astUtils = require("../shared/ast-utils"),
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22 | ConfigOps = require("@eslint/eslintrc/lib/shared/config-ops"),
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23 | ConfigValidator = require("@eslint/eslintrc/lib/shared/config-validator"),
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24 | Traverser = require("../shared/traverser"),
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25 | { SourceCode } = require("../source-code"),
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26 | CodePathAnalyzer = require("./code-path-analysis/code-path-analyzer"),
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27 | applyDisableDirectives = require("./apply-disable-directives"),
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28 | ConfigCommentParser = require("./config-comment-parser"),
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29 | NodeEventGenerator = require("./node-event-generator"),
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30 | createReportTranslator = require("./report-translator"),
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31 | Rules = require("./rules"),
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32 | createEmitter = require("./safe-emitter"),
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33 | SourceCodeFixer = require("./source-code-fixer"),
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34 | timing = require("./timing"),
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35 | ruleReplacements = require("../../conf/replacements.json");
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36 |
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37 | const debug = require("debug")("eslint:linter");
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38 | const MAX_AUTOFIX_PASSES = 10;
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39 | const DEFAULT_PARSER_NAME = "espree";
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40 | const commentParser = new ConfigCommentParser();
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41 | const DEFAULT_ERROR_LOC = { start: { line: 1, column: 0 }, end: { line: 1, column: 1 } };
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42 |
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43 | //------------------------------------------------------------------------------
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44 | // Typedefs
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45 | //------------------------------------------------------------------------------
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46 |
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47 | /** @typedef {InstanceType<import("../cli-engine/config-array")["ConfigArray"]>} ConfigArray */
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48 | /** @typedef {InstanceType<import("../cli-engine/config-array")["ExtractedConfig"]>} ExtractedConfig */
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49 | /** @typedef {import("../shared/types").ConfigData} ConfigData */
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50 | /** @typedef {import("../shared/types").Environment} Environment */
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51 | /** @typedef {import("../shared/types").GlobalConf} GlobalConf */
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52 | /** @typedef {import("../shared/types").LintMessage} LintMessage */
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53 | /** @typedef {import("../shared/types").ParserOptions} ParserOptions */
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54 | /** @typedef {import("../shared/types").Processor} Processor */
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55 | /** @typedef {import("../shared/types").Rule} Rule */
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56 |
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57 | /**
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58 | * @template T
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59 | * @typedef {{ [P in keyof T]-?: T[P] }} Required
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60 | */
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61 |
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62 | /**
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63 | * @typedef {Object} DisableDirective
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64 | * @property {("disable"|"enable"|"disable-line"|"disable-next-line")} type
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65 | * @property {number} line
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66 | * @property {number} column
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67 | * @property {(string|null)} ruleId
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68 | */
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69 |
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70 | /**
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71 | * The private data for `Linter` instance.
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72 | * @typedef {Object} LinterInternalSlots
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73 | * @property {ConfigArray|null} lastConfigArray The `ConfigArray` instance that the last `verify()` call used.
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74 | * @property {SourceCode|null} lastSourceCode The `SourceCode` instance that the last `verify()` call used.
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75 | * @property {Map<string, Parser>} parserMap The loaded parsers.
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76 | * @property {Rules} ruleMap The loaded rules.
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77 | */
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78 |
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79 | /**
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80 | * @typedef {Object} VerifyOptions
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81 | * @property {boolean} [allowInlineConfig] Allow/disallow inline comments' ability
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82 | * to change config once it is set. Defaults to true if not supplied.
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83 | * Useful if you want to validate JS without comments overriding rules.
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84 | * @property {boolean} [disableFixes] if `true` then the linter doesn't make `fix`
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85 | * properties into the lint result.
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86 | * @property {string} [filename] the filename of the source code.
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87 | * @property {boolean | "off" | "warn" | "error"} [reportUnusedDisableDirectives] Adds reported errors for
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88 | * unused `eslint-disable` directives.
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89 | */
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90 |
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91 | /**
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92 | * @typedef {Object} ProcessorOptions
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93 | * @property {(filename:string, text:string) => boolean} [filterCodeBlock] the
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94 | * predicate function that selects adopt code blocks.
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95 | * @property {Processor["postprocess"]} [postprocess] postprocessor for report
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96 | * messages. If provided, this should accept an array of the message lists
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97 | * for each code block returned from the preprocessor, apply a mapping to
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98 | * the messages as appropriate, and return a one-dimensional array of
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99 | * messages.
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100 | * @property {Processor["preprocess"]} [preprocess] preprocessor for source text.
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101 | * If provided, this should accept a string of source text, and return an
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102 | * array of code blocks to lint.
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103 | */
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104 |
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105 | /**
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106 | * @typedef {Object} FixOptions
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107 | * @property {boolean | ((message: LintMessage) => boolean)} [fix] Determines
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108 | * whether fixes should be applied.
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109 | */
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110 |
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111 | /**
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112 | * @typedef {Object} InternalOptions
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113 | * @property {string | null} warnInlineConfig The config name what `noInlineConfig` setting came from. If `noInlineConfig` setting didn't exist, this is null. If this is a config name, then the linter warns directive comments.
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114 | * @property {"off" | "warn" | "error"} reportUnusedDisableDirectives (boolean values were normalized)
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115 | */
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116 |
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117 | //------------------------------------------------------------------------------
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118 | // Helpers
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119 | //------------------------------------------------------------------------------
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120 |
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121 | /**
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122 | * Ensures that variables representing built-in properties of the Global Object,
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123 | * and any globals declared by special block comments, are present in the global
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124 | * scope.
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125 | * @param {Scope} globalScope The global scope.
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126 | * @param {Object} configGlobals The globals declared in configuration
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127 | * @param {{exportedVariables: Object, enabledGlobals: Object}} commentDirectives Directives from comment configuration
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128 | * @returns {void}
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129 | */
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130 | function addDeclaredGlobals(globalScope, configGlobals, { exportedVariables, enabledGlobals }) {
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131 |
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132 | // Define configured global variables.
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133 | for (const id of new Set([...Object.keys(configGlobals), ...Object.keys(enabledGlobals)])) {
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134 |
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135 | /*
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136 | * `ConfigOps.normalizeConfigGlobal` will throw an error if a configured global value is invalid. However, these errors would
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137 | * typically be caught when validating a config anyway (validity for inline global comments is checked separately).
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138 | */
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139 | const configValue = configGlobals[id] === void 0 ? void 0 : ConfigOps.normalizeConfigGlobal(configGlobals[id]);
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140 | const commentValue = enabledGlobals[id] && enabledGlobals[id].value;
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141 | const value = commentValue || configValue;
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142 | const sourceComments = enabledGlobals[id] && enabledGlobals[id].comments;
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143 |
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144 | if (value === "off") {
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145 | continue;
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146 | }
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147 |
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148 | let variable = globalScope.set.get(id);
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149 |
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150 | if (!variable) {
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151 | variable = new eslintScope.Variable(id, globalScope);
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152 |
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153 | globalScope.variables.push(variable);
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154 | globalScope.set.set(id, variable);
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155 | }
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156 |
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157 | variable.eslintImplicitGlobalSetting = configValue;
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158 | variable.eslintExplicitGlobal = sourceComments !== void 0;
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159 | variable.eslintExplicitGlobalComments = sourceComments;
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160 | variable.writeable = (value === "writable");
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161 | }
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162 |
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163 | // mark all exported variables as such
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164 | Object.keys(exportedVariables).forEach(name => {
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165 | const variable = globalScope.set.get(name);
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166 |
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167 | if (variable) {
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168 | variable.eslintUsed = true;
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169 | }
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170 | });
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171 |
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172 | /*
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173 | * "through" contains all references which definitions cannot be found.
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174 | * Since we augment the global scope using configuration, we need to update
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175 | * references and remove the ones that were added by configuration.
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176 | */
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177 | globalScope.through = globalScope.through.filter(reference => {
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178 | const name = reference.identifier.name;
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179 | const variable = globalScope.set.get(name);
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180 |
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181 | if (variable) {
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182 |
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183 | /*
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184 | * Links the variable and the reference.
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185 | * And this reference is removed from `Scope#through`.
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186 | */
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187 | reference.resolved = variable;
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188 | variable.references.push(reference);
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189 |
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190 | return false;
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191 | }
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192 |
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193 | return true;
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194 | });
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195 | }
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196 |
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197 | /**
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198 | * creates a missing-rule message.
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199 | * @param {string} ruleId the ruleId to create
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200 | * @returns {string} created error message
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201 | * @private
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202 | */
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203 | function createMissingRuleMessage(ruleId) {
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204 | return Object.prototype.hasOwnProperty.call(ruleReplacements.rules, ruleId)
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205 | ? `Rule '${ruleId}' was removed and replaced by: ${ruleReplacements.rules[ruleId].join(", ")}`
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206 | : `Definition for rule '${ruleId}' was not found.`;
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207 | }
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208 |
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209 | /**
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210 | * creates a linting problem
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211 | * @param {Object} options to create linting error
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212 | * @param {string} [options.ruleId] the ruleId to report
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213 | * @param {Object} [options.loc] the loc to report
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214 | * @param {string} [options.message] the error message to report
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215 | * @param {string} [options.severity] the error message to report
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216 | * @returns {LintMessage} created problem, returns a missing-rule problem if only provided ruleId.
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217 | * @private
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218 | */
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219 | function createLintingProblem(options) {
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220 | const {
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221 | ruleId = null,
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222 | loc = DEFAULT_ERROR_LOC,
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223 | message = createMissingRuleMessage(options.ruleId),
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224 | severity = 2
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225 | } = options;
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226 |
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227 | return {
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228 | ruleId,
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229 | message,
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230 | line: loc.start.line,
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231 | column: loc.start.column + 1,
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232 | endLine: loc.end.line,
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233 | endColumn: loc.end.column + 1,
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234 | severity,
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235 | nodeType: null
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236 | };
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237 | }
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238 |
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239 | /**
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240 | * Creates a collection of disable directives from a comment
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241 | * @param {Object} options to create disable directives
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242 | * @param {("disable"|"enable"|"disable-line"|"disable-next-line")} options.type The type of directive comment
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243 | * @param {{line: number, column: number}} options.loc The 0-based location of the comment token
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244 | * @param {string} options.value The value after the directive in the comment
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245 | * comment specified no specific rules, so it applies to all rules (e.g. `eslint-disable`)
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246 | * @param {function(string): {create: Function}} options.ruleMapper A map from rule IDs to defined rules
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247 | * @returns {Object} Directives and problems from the comment
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248 | */
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249 | function createDisableDirectives(options) {
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250 | const { type, loc, value, ruleMapper } = options;
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251 | const ruleIds = Object.keys(commentParser.parseListConfig(value));
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252 | const directiveRules = ruleIds.length ? ruleIds : [null];
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253 | const result = {
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254 | directives: [], // valid disable directives
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255 | directiveProblems: [] // problems in directives
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256 | };
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257 |
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258 | for (const ruleId of directiveRules) {
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259 |
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260 | // push to directives, if the rule is defined(including null, e.g. /*eslint enable*/)
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261 | if (ruleId === null || ruleMapper(ruleId) !== null) {
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262 | result.directives.push({ type, line: loc.start.line, column: loc.start.column + 1, ruleId });
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263 | } else {
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264 | result.directiveProblems.push(createLintingProblem({ ruleId, loc }));
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265 | }
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266 | }
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267 | return result;
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268 | }
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269 |
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270 | /**
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271 | * Remove the ignored part from a given directive comment and trim it.
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272 | * @param {string} value The comment text to strip.
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273 | * @returns {string} The stripped text.
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274 | */
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275 | function stripDirectiveComment(value) {
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276 | return value.split(/\s-{2,}\s/u)[0].trim();
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277 | }
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278 |
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279 | /**
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280 | * Parses comments in file to extract file-specific config of rules, globals
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281 | * and environments and merges them with global config; also code blocks
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282 | * where reporting is disabled or enabled and merges them with reporting config.
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283 | * @param {string} filename The file being checked.
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284 | * @param {ASTNode} ast The top node of the AST.
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285 | * @param {function(string): {create: Function}} ruleMapper A map from rule IDs to defined rules
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286 | * @param {string|null} warnInlineConfig If a string then it should warn directive comments as disabled. The string value is the config name what the setting came from.
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287 | * @returns {{configuredRules: Object, enabledGlobals: {value:string,comment:Token}[], exportedVariables: Object, problems: Problem[], disableDirectives: DisableDirective[]}}
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288 | * A collection of the directive comments that were found, along with any problems that occurred when parsing
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289 | */
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290 | function getDirectiveComments(filename, ast, ruleMapper, warnInlineConfig) {
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291 | const configuredRules = {};
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292 | const enabledGlobals = Object.create(null);
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293 | const exportedVariables = {};
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294 | const problems = [];
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295 | const disableDirectives = [];
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296 | const validator = new ConfigValidator({
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297 | builtInRules: Rules
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298 | });
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299 |
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300 | ast.comments.filter(token => token.type !== "Shebang").forEach(comment => {
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301 | const trimmedCommentText = stripDirectiveComment(comment.value);
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302 | const match = /^(eslint(?:-env|-enable|-disable(?:(?:-next)?-line)?)?|exported|globals?)(?:\s|$)/u.exec(trimmedCommentText);
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303 |
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304 | if (!match) {
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305 | return;
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306 | }
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307 | const directiveText = match[1];
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308 | const lineCommentSupported = /^eslint-disable-(next-)?line$/u.test(directiveText);
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309 |
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310 | if (comment.type === "Line" && !lineCommentSupported) {
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311 | return;
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312 | }
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313 |
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314 | if (warnInlineConfig) {
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315 | const kind = comment.type === "Block" ? `/*${directiveText}*/` : `//${directiveText}`;
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316 |
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317 | problems.push(createLintingProblem({
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318 | ruleId: null,
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319 | message: `'${kind}' has no effect because you have 'noInlineConfig' setting in ${warnInlineConfig}.`,
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320 | loc: comment.loc,
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321 | severity: 1
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322 | }));
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323 | return;
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324 | }
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325 |
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326 | if (lineCommentSupported && comment.loc.start.line !== comment.loc.end.line) {
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327 | const message = `${directiveText} comment should not span multiple lines.`;
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328 |
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329 | problems.push(createLintingProblem({
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330 | ruleId: null,
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331 | message,
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332 | loc: comment.loc
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333 | }));
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334 | return;
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335 | }
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336 |
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337 | const directiveValue = trimmedCommentText.slice(match.index + directiveText.length);
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338 |
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339 | switch (directiveText) {
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340 | case "eslint-disable":
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341 | case "eslint-enable":
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342 | case "eslint-disable-next-line":
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343 | case "eslint-disable-line": {
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344 | const directiveType = directiveText.slice("eslint-".length);
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345 | const options = { type: directiveType, loc: comment.loc, value: directiveValue, ruleMapper };
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346 | const { directives, directiveProblems } = createDisableDirectives(options);
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347 |
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348 | disableDirectives.push(...directives);
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349 | problems.push(...directiveProblems);
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350 | break;
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351 | }
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352 |
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353 | case "exported":
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354 | Object.assign(exportedVariables, commentParser.parseStringConfig(directiveValue, comment));
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355 | break;
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356 |
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357 | case "globals":
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358 | case "global":
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359 | for (const [id, { value }] of Object.entries(commentParser.parseStringConfig(directiveValue, comment))) {
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360 | let normalizedValue;
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361 |
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362 | try {
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363 | normalizedValue = ConfigOps.normalizeConfigGlobal(value);
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364 | } catch (err) {
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365 | problems.push(createLintingProblem({
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366 | ruleId: null,
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367 | loc: comment.loc,
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368 | message: err.message
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369 | }));
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370 | continue;
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371 | }
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372 |
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373 | if (enabledGlobals[id]) {
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374 | enabledGlobals[id].comments.push(comment);
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375 | enabledGlobals[id].value = normalizedValue;
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376 | } else {
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377 | enabledGlobals[id] = {
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378 | comments: [comment],
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379 | value: normalizedValue
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380 | };
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381 | }
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382 | }
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383 | break;
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384 |
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385 | case "eslint": {
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386 | const parseResult = commentParser.parseJsonConfig(directiveValue, comment.loc);
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387 |
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388 | if (parseResult.success) {
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389 | Object.keys(parseResult.config).forEach(name => {
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390 | const rule = ruleMapper(name);
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391 | const ruleValue = parseResult.config[name];
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392 |
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393 | if (rule === null) {
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394 | problems.push(createLintingProblem({ ruleId: name, loc: comment.loc }));
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395 | return;
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396 | }
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397 |
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398 | try {
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399 | validator.validateRuleOptions(rule, name, ruleValue);
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400 | } catch (err) {
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401 | problems.push(createLintingProblem({
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402 | ruleId: name,
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403 | message: err.message,
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404 | loc: comment.loc
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405 | }));
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406 |
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407 | // do not apply the config, if found invalid options.
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408 | return;
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409 | }
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410 |
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411 | configuredRules[name] = ruleValue;
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412 | });
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413 | } else {
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414 | problems.push(parseResult.error);
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415 | }
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416 |
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417 | break;
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418 | }
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419 |
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420 | // no default
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421 | }
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422 | });
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423 |
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424 | return {
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425 | configuredRules,
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426 | enabledGlobals,
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427 | exportedVariables,
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428 | problems,
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429 | disableDirectives
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430 | };
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431 | }
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432 |
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433 | /**
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434 | * Normalize ECMAScript version from the initial config
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435 | * @param {number} ecmaVersion ECMAScript version from the initial config
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436 | * @returns {number} normalized ECMAScript version
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437 | */
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438 | function normalizeEcmaVersion(ecmaVersion) {
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439 |
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440 | /*
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441 | * Calculate ECMAScript edition number from official year version starting with
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442 | * ES2015, which corresponds with ES6 (or a difference of 2009).
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443 | */
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444 | return ecmaVersion >= 2015 ? ecmaVersion - 2009 : ecmaVersion;
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445 | }
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446 |
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447 | const eslintEnvPattern = /\/\*\s*eslint-env\s(.+?)\*\//gu;
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448 |
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449 | /**
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450 | * Checks whether or not there is a comment which has "eslint-env *" in a given text.
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451 | * @param {string} text A source code text to check.
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452 | * @returns {Object|null} A result of parseListConfig() with "eslint-env *" comment.
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453 | */
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454 | function findEslintEnv(text) {
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455 | let match, retv;
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456 |
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457 | eslintEnvPattern.lastIndex = 0;
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458 |
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459 | while ((match = eslintEnvPattern.exec(text)) !== null) {
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460 | retv = Object.assign(
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461 | retv || {},
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462 | commentParser.parseListConfig(stripDirectiveComment(match[1]))
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463 | );
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464 | }
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465 |
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466 | return retv;
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467 | }
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468 |
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469 | /**
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470 | * Convert "/path/to/<text>" to "<text>".
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471 | * `CLIEngine#executeOnText()` method gives "/path/to/<text>" if the filename
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472 | * was omitted because `configArray.extractConfig()` requires an absolute path.
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473 | * But the linter should pass `<text>` to `RuleContext#getFilename()` in that
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474 | * case.
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475 | * Also, code blocks can have their virtual filename. If the parent filename was
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476 | * `<text>`, the virtual filename is `<text>/0_foo.js` or something like (i.e.,
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477 | * it's not an absolute path).
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478 | * @param {string} filename The filename to normalize.
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479 | * @returns {string} The normalized filename.
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480 | */
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481 | function normalizeFilename(filename) {
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482 | const parts = filename.split(path.sep);
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483 | const index = parts.lastIndexOf("<text>");
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484 |
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485 | return index === -1 ? filename : parts.slice(index).join(path.sep);
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486 | }
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487 |
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488 | /**
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489 | * Normalizes the possible options for `linter.verify` and `linter.verifyAndFix` to a
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490 | * consistent shape.
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491 | * @param {VerifyOptions} providedOptions Options
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492 | * @param {ConfigData} config Config.
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493 | * @returns {Required<VerifyOptions> & InternalOptions} Normalized options
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494 | */
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495 | function normalizeVerifyOptions(providedOptions, config) {
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496 | const disableInlineConfig = config.noInlineConfig === true;
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497 | const ignoreInlineConfig = providedOptions.allowInlineConfig === false;
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498 | const configNameOfNoInlineConfig = config.configNameOfNoInlineConfig
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499 | ? ` (${config.configNameOfNoInlineConfig})`
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500 | : "";
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501 |
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502 | let reportUnusedDisableDirectives = providedOptions.reportUnusedDisableDirectives;
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503 |
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504 | if (typeof reportUnusedDisableDirectives === "boolean") {
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505 | reportUnusedDisableDirectives = reportUnusedDisableDirectives ? "error" : "off";
|
506 | }
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507 | if (typeof reportUnusedDisableDirectives !== "string") {
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508 | reportUnusedDisableDirectives = config.reportUnusedDisableDirectives ? "warn" : "off";
|
509 | }
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510 |
|
511 | return {
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512 | filename: normalizeFilename(providedOptions.filename || "<input>"),
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513 | allowInlineConfig: !ignoreInlineConfig,
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514 | warnInlineConfig: disableInlineConfig && !ignoreInlineConfig
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515 | ? `your config${configNameOfNoInlineConfig}`
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516 | : null,
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517 | reportUnusedDisableDirectives,
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518 | disableFixes: Boolean(providedOptions.disableFixes)
|
519 | };
|
520 | }
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521 |
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522 | /**
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523 | * Combines the provided parserOptions with the options from environments
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524 | * @param {string} parserName The parser name which uses this options.
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525 | * @param {ParserOptions} providedOptions The provided 'parserOptions' key in a config
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526 | * @param {Environment[]} enabledEnvironments The environments enabled in configuration and with inline comments
|
527 | * @returns {ParserOptions} Resulting parser options after merge
|
528 | */
|
529 | function resolveParserOptions(parserName, providedOptions, enabledEnvironments) {
|
530 | const parserOptionsFromEnv = enabledEnvironments
|
531 | .filter(env => env.parserOptions)
|
532 | .reduce((parserOptions, env) => lodash.merge(parserOptions, env.parserOptions), {});
|
533 | const mergedParserOptions = lodash.merge(parserOptionsFromEnv, providedOptions || {});
|
534 | const isModule = mergedParserOptions.sourceType === "module";
|
535 |
|
536 | if (isModule) {
|
537 |
|
538 | /*
|
539 | * can't have global return inside of modules
|
540 | * TODO: espree validate parserOptions.globalReturn when sourceType is setting to module.(@aladdin-add)
|
541 | */
|
542 | mergedParserOptions.ecmaFeatures = Object.assign({}, mergedParserOptions.ecmaFeatures, { globalReturn: false });
|
543 | }
|
544 |
|
545 | /*
|
546 | * TODO: @aladdin-add
|
547 | * 1. for a 3rd-party parser, do not normalize parserOptions
|
548 | * 2. for espree, no need to do this (espree will do it)
|
549 | */
|
550 | mergedParserOptions.ecmaVersion = normalizeEcmaVersion(mergedParserOptions.ecmaVersion);
|
551 |
|
552 | return mergedParserOptions;
|
553 | }
|
554 |
|
555 | /**
|
556 | * Combines the provided globals object with the globals from environments
|
557 | * @param {Record<string, GlobalConf>} providedGlobals The 'globals' key in a config
|
558 | * @param {Environment[]} enabledEnvironments The environments enabled in configuration and with inline comments
|
559 | * @returns {Record<string, GlobalConf>} The resolved globals object
|
560 | */
|
561 | function resolveGlobals(providedGlobals, enabledEnvironments) {
|
562 | return Object.assign(
|
563 | {},
|
564 | ...enabledEnvironments.filter(env => env.globals).map(env => env.globals),
|
565 | providedGlobals
|
566 | );
|
567 | }
|
568 |
|
569 | /**
|
570 | * Strips Unicode BOM from a given text.
|
571 | * @param {string} text A text to strip.
|
572 | * @returns {string} The stripped text.
|
573 | */
|
574 | function stripUnicodeBOM(text) {
|
575 |
|
576 | /*
|
577 | * Check Unicode BOM.
|
578 | * In JavaScript, string data is stored as UTF-16, so BOM is 0xFEFF.
|
579 | * http://www.ecma-international.org/ecma-262/6.0/#sec-unicode-format-control-characters
|
580 | */
|
581 | if (text.charCodeAt(0) === 0xFEFF) {
|
582 | return text.slice(1);
|
583 | }
|
584 | return text;
|
585 | }
|
586 |
|
587 | /**
|
588 | * Get the options for a rule (not including severity), if any
|
589 | * @param {Array|number} ruleConfig rule configuration
|
590 | * @returns {Array} of rule options, empty Array if none
|
591 | */
|
592 | function getRuleOptions(ruleConfig) {
|
593 | if (Array.isArray(ruleConfig)) {
|
594 | return ruleConfig.slice(1);
|
595 | }
|
596 | return [];
|
597 |
|
598 | }
|
599 |
|
600 | /**
|
601 | * Analyze scope of the given AST.
|
602 | * @param {ASTNode} ast The `Program` node to analyze.
|
603 | * @param {ParserOptions} parserOptions The parser options.
|
604 | * @param {Record<string, string[]>} visitorKeys The visitor keys.
|
605 | * @returns {ScopeManager} The analysis result.
|
606 | */
|
607 | function analyzeScope(ast, parserOptions, visitorKeys) {
|
608 | const ecmaFeatures = parserOptions.ecmaFeatures || {};
|
609 | const ecmaVersion = parserOptions.ecmaVersion || 5;
|
610 |
|
611 | return eslintScope.analyze(ast, {
|
612 | ignoreEval: true,
|
613 | nodejsScope: ecmaFeatures.globalReturn,
|
614 | impliedStrict: ecmaFeatures.impliedStrict,
|
615 | ecmaVersion,
|
616 | sourceType: parserOptions.sourceType || "script",
|
617 | childVisitorKeys: visitorKeys || evk.KEYS,
|
618 | fallback: Traverser.getKeys
|
619 | });
|
620 | }
|
621 |
|
622 | /**
|
623 | * Parses text into an AST. Moved out here because the try-catch prevents
|
624 | * optimization of functions, so it's best to keep the try-catch as isolated
|
625 | * as possible
|
626 | * @param {string} text The text to parse.
|
627 | * @param {Parser} parser The parser to parse.
|
628 | * @param {ParserOptions} providedParserOptions Options to pass to the parser
|
629 | * @param {string} filePath The path to the file being parsed.
|
630 | * @returns {{success: false, error: Problem}|{success: true, sourceCode: SourceCode}}
|
631 | * An object containing the AST and parser services if parsing was successful, or the error if parsing failed
|
632 | * @private
|
633 | */
|
634 | function parse(text, parser, providedParserOptions, filePath) {
|
635 | const textToParse = stripUnicodeBOM(text).replace(astUtils.shebangPattern, (match, captured) => `//${captured}`);
|
636 | const parserOptions = Object.assign({}, providedParserOptions, {
|
637 | loc: true,
|
638 | range: true,
|
639 | raw: true,
|
640 | tokens: true,
|
641 | comment: true,
|
642 | eslintVisitorKeys: true,
|
643 | eslintScopeManager: true,
|
644 | filePath
|
645 | });
|
646 |
|
647 | /*
|
648 | * Check for parsing errors first. If there's a parsing error, nothing
|
649 | * else can happen. However, a parsing error does not throw an error
|
650 | * from this method - it's just considered a fatal error message, a
|
651 | * problem that ESLint identified just like any other.
|
652 | */
|
653 | try {
|
654 | const parseResult = (typeof parser.parseForESLint === "function")
|
655 | ? parser.parseForESLint(textToParse, parserOptions)
|
656 | : { ast: parser.parse(textToParse, parserOptions) };
|
657 | const ast = parseResult.ast;
|
658 | const parserServices = parseResult.services || {};
|
659 | const visitorKeys = parseResult.visitorKeys || evk.KEYS;
|
660 | const scopeManager = parseResult.scopeManager || analyzeScope(ast, parserOptions, visitorKeys);
|
661 |
|
662 | return {
|
663 | success: true,
|
664 |
|
665 | /*
|
666 | * Save all values that `parseForESLint()` returned.
|
667 | * If a `SourceCode` object is given as the first parameter instead of source code text,
|
668 | * linter skips the parsing process and reuses the source code object.
|
669 | * In that case, linter needs all the values that `parseForESLint()` returned.
|
670 | */
|
671 | sourceCode: new SourceCode({
|
672 | text,
|
673 | ast,
|
674 | parserServices,
|
675 | scopeManager,
|
676 | visitorKeys
|
677 | })
|
678 | };
|
679 | } catch (ex) {
|
680 |
|
681 | // If the message includes a leading line number, strip it:
|
682 | const message = `Parsing error: ${ex.message.replace(/^line \d+:/iu, "").trim()}`;
|
683 |
|
684 | debug("%s\n%s", message, ex.stack);
|
685 |
|
686 | return {
|
687 | success: false,
|
688 | error: {
|
689 | ruleId: null,
|
690 | fatal: true,
|
691 | severity: 2,
|
692 | message,
|
693 | line: ex.lineNumber,
|
694 | column: ex.column
|
695 | }
|
696 | };
|
697 | }
|
698 | }
|
699 |
|
700 | /**
|
701 | * Gets the scope for the current node
|
702 | * @param {ScopeManager} scopeManager The scope manager for this AST
|
703 | * @param {ASTNode} currentNode The node to get the scope of
|
704 | * @returns {eslint-scope.Scope} The scope information for this node
|
705 | */
|
706 | function getScope(scopeManager, currentNode) {
|
707 |
|
708 | // On Program node, get the outermost scope to avoid return Node.js special function scope or ES modules scope.
|
709 | const inner = currentNode.type !== "Program";
|
710 |
|
711 | for (let node = currentNode; node; node = node.parent) {
|
712 | const scope = scopeManager.acquire(node, inner);
|
713 |
|
714 | if (scope) {
|
715 | if (scope.type === "function-expression-name") {
|
716 | return scope.childScopes[0];
|
717 | }
|
718 | return scope;
|
719 | }
|
720 | }
|
721 |
|
722 | return scopeManager.scopes[0];
|
723 | }
|
724 |
|
725 | /**
|
726 | * Marks a variable as used in the current scope
|
727 | * @param {ScopeManager} scopeManager The scope manager for this AST. The scope may be mutated by this function.
|
728 | * @param {ASTNode} currentNode The node currently being traversed
|
729 | * @param {Object} parserOptions The options used to parse this text
|
730 | * @param {string} name The name of the variable that should be marked as used.
|
731 | * @returns {boolean} True if the variable was found and marked as used, false if not.
|
732 | */
|
733 | function markVariableAsUsed(scopeManager, currentNode, parserOptions, name) {
|
734 | const hasGlobalReturn = parserOptions.ecmaFeatures && parserOptions.ecmaFeatures.globalReturn;
|
735 | const specialScope = hasGlobalReturn || parserOptions.sourceType === "module";
|
736 | const currentScope = getScope(scopeManager, currentNode);
|
737 |
|
738 | // Special Node.js scope means we need to start one level deeper
|
739 | const initialScope = currentScope.type === "global" && specialScope ? currentScope.childScopes[0] : currentScope;
|
740 |
|
741 | for (let scope = initialScope; scope; scope = scope.upper) {
|
742 | const variable = scope.variables.find(scopeVar => scopeVar.name === name);
|
743 |
|
744 | if (variable) {
|
745 | variable.eslintUsed = true;
|
746 | return true;
|
747 | }
|
748 | }
|
749 |
|
750 | return false;
|
751 | }
|
752 |
|
753 | /**
|
754 | * Runs a rule, and gets its listeners
|
755 | * @param {Rule} rule A normalized rule with a `create` method
|
756 | * @param {Context} ruleContext The context that should be passed to the rule
|
757 | * @returns {Object} A map of selector listeners provided by the rule
|
758 | */
|
759 | function createRuleListeners(rule, ruleContext) {
|
760 | try {
|
761 | return rule.create(ruleContext);
|
762 | } catch (ex) {
|
763 | ex.message = `Error while loading rule '${ruleContext.id}': ${ex.message}`;
|
764 | throw ex;
|
765 | }
|
766 | }
|
767 |
|
768 | /**
|
769 | * Gets all the ancestors of a given node
|
770 | * @param {ASTNode} node The node
|
771 | * @returns {ASTNode[]} All the ancestor nodes in the AST, not including the provided node, starting
|
772 | * from the root node and going inwards to the parent node.
|
773 | */
|
774 | function getAncestors(node) {
|
775 | const ancestorsStartingAtParent = [];
|
776 |
|
777 | for (let ancestor = node.parent; ancestor; ancestor = ancestor.parent) {
|
778 | ancestorsStartingAtParent.push(ancestor);
|
779 | }
|
780 |
|
781 | return ancestorsStartingAtParent.reverse();
|
782 | }
|
783 |
|
784 | // methods that exist on SourceCode object
|
785 | const DEPRECATED_SOURCECODE_PASSTHROUGHS = {
|
786 | getSource: "getText",
|
787 | getSourceLines: "getLines",
|
788 | getAllComments: "getAllComments",
|
789 | getNodeByRangeIndex: "getNodeByRangeIndex",
|
790 | getComments: "getComments",
|
791 | getCommentsBefore: "getCommentsBefore",
|
792 | getCommentsAfter: "getCommentsAfter",
|
793 | getCommentsInside: "getCommentsInside",
|
794 | getJSDocComment: "getJSDocComment",
|
795 | getFirstToken: "getFirstToken",
|
796 | getFirstTokens: "getFirstTokens",
|
797 | getLastToken: "getLastToken",
|
798 | getLastTokens: "getLastTokens",
|
799 | getTokenAfter: "getTokenAfter",
|
800 | getTokenBefore: "getTokenBefore",
|
801 | getTokenByRangeStart: "getTokenByRangeStart",
|
802 | getTokens: "getTokens",
|
803 | getTokensAfter: "getTokensAfter",
|
804 | getTokensBefore: "getTokensBefore",
|
805 | getTokensBetween: "getTokensBetween"
|
806 | };
|
807 |
|
808 | const BASE_TRAVERSAL_CONTEXT = Object.freeze(
|
809 | Object.keys(DEPRECATED_SOURCECODE_PASSTHROUGHS).reduce(
|
810 | (contextInfo, methodName) =>
|
811 | Object.assign(contextInfo, {
|
812 | [methodName](...args) {
|
813 | return this.getSourceCode()[DEPRECATED_SOURCECODE_PASSTHROUGHS[methodName]](...args);
|
814 | }
|
815 | }),
|
816 | {}
|
817 | )
|
818 | );
|
819 |
|
820 | /**
|
821 | * Runs the given rules on the given SourceCode object
|
822 | * @param {SourceCode} sourceCode A SourceCode object for the given text
|
823 | * @param {Object} configuredRules The rules configuration
|
824 | * @param {function(string): Rule} ruleMapper A mapper function from rule names to rules
|
825 | * @param {Object} parserOptions The options that were passed to the parser
|
826 | * @param {string} parserName The name of the parser in the config
|
827 | * @param {Object} settings The settings that were enabled in the config
|
828 | * @param {string} filename The reported filename of the code
|
829 | * @param {boolean} disableFixes If true, it doesn't make `fix` properties.
|
830 | * @param {string | undefined} cwd cwd of the cli
|
831 | * @returns {Problem[]} An array of reported problems
|
832 | */
|
833 | function runRules(sourceCode, configuredRules, ruleMapper, parserOptions, parserName, settings, filename, disableFixes, cwd) {
|
834 | const emitter = createEmitter();
|
835 | const nodeQueue = [];
|
836 | let currentNode = sourceCode.ast;
|
837 |
|
838 | Traverser.traverse(sourceCode.ast, {
|
839 | enter(node, parent) {
|
840 | node.parent = parent;
|
841 | nodeQueue.push({ isEntering: true, node });
|
842 | },
|
843 | leave(node) {
|
844 | nodeQueue.push({ isEntering: false, node });
|
845 | },
|
846 | visitorKeys: sourceCode.visitorKeys
|
847 | });
|
848 |
|
849 | /*
|
850 | * Create a frozen object with the ruleContext properties and methods that are shared by all rules.
|
851 | * All rule contexts will inherit from this object. This avoids the performance penalty of copying all the
|
852 | * properties once for each rule.
|
853 | */
|
854 | const sharedTraversalContext = Object.freeze(
|
855 | Object.assign(
|
856 | Object.create(BASE_TRAVERSAL_CONTEXT),
|
857 | {
|
858 | getAncestors: () => getAncestors(currentNode),
|
859 | getDeclaredVariables: sourceCode.scopeManager.getDeclaredVariables.bind(sourceCode.scopeManager),
|
860 | getCwd: () => cwd,
|
861 | getFilename: () => filename,
|
862 | getScope: () => getScope(sourceCode.scopeManager, currentNode),
|
863 | getSourceCode: () => sourceCode,
|
864 | markVariableAsUsed: name => markVariableAsUsed(sourceCode.scopeManager, currentNode, parserOptions, name),
|
865 | parserOptions,
|
866 | parserPath: parserName,
|
867 | parserServices: sourceCode.parserServices,
|
868 | settings
|
869 | }
|
870 | )
|
871 | );
|
872 |
|
873 |
|
874 | const lintingProblems = [];
|
875 |
|
876 | Object.keys(configuredRules).forEach(ruleId => {
|
877 | const severity = ConfigOps.getRuleSeverity(configuredRules[ruleId]);
|
878 |
|
879 | // not load disabled rules
|
880 | if (severity === 0) {
|
881 | return;
|
882 | }
|
883 |
|
884 | const rule = ruleMapper(ruleId);
|
885 |
|
886 | if (rule === null) {
|
887 | lintingProblems.push(createLintingProblem({ ruleId }));
|
888 | return;
|
889 | }
|
890 |
|
891 | const messageIds = rule.meta && rule.meta.messages;
|
892 | let reportTranslator = null;
|
893 | const ruleContext = Object.freeze(
|
894 | Object.assign(
|
895 | Object.create(sharedTraversalContext),
|
896 | {
|
897 | id: ruleId,
|
898 | options: getRuleOptions(configuredRules[ruleId]),
|
899 | report(...args) {
|
900 |
|
901 | /*
|
902 | * Create a report translator lazily.
|
903 | * In a vast majority of cases, any given rule reports zero errors on a given
|
904 | * piece of code. Creating a translator lazily avoids the performance cost of
|
905 | * creating a new translator function for each rule that usually doesn't get
|
906 | * called.
|
907 | *
|
908 | * Using lazy report translators improves end-to-end performance by about 3%
|
909 | * with Node 8.4.0.
|
910 | */
|
911 | if (reportTranslator === null) {
|
912 | reportTranslator = createReportTranslator({
|
913 | ruleId,
|
914 | severity,
|
915 | sourceCode,
|
916 | messageIds,
|
917 | disableFixes
|
918 | });
|
919 | }
|
920 | const problem = reportTranslator(...args);
|
921 |
|
922 | if (problem.fix && rule.meta && !rule.meta.fixable) {
|
923 | throw new Error("Fixable rules should export a `meta.fixable` property.");
|
924 | }
|
925 | lintingProblems.push(problem);
|
926 | }
|
927 | }
|
928 | )
|
929 | );
|
930 |
|
931 | const ruleListeners = createRuleListeners(rule, ruleContext);
|
932 |
|
933 | // add all the selectors from the rule as listeners
|
934 | Object.keys(ruleListeners).forEach(selector => {
|
935 | emitter.on(
|
936 | selector,
|
937 | timing.enabled
|
938 | ? timing.time(ruleId, ruleListeners[selector])
|
939 | : ruleListeners[selector]
|
940 | );
|
941 | });
|
942 | });
|
943 |
|
944 | // only run code path analyzer if the top level node is "Program", skip otherwise
|
945 | const eventGenerator = nodeQueue[0].node.type === "Program"
|
946 | ? new CodePathAnalyzer(new NodeEventGenerator(emitter, { visitorKeys: sourceCode.visitorKeys, fallback: Traverser.getKeys }))
|
947 | : new NodeEventGenerator(emitter, { visitorKeys: sourceCode.visitorKeys, fallback: Traverser.getKeys });
|
948 |
|
949 | nodeQueue.forEach(traversalInfo => {
|
950 | currentNode = traversalInfo.node;
|
951 |
|
952 | try {
|
953 | if (traversalInfo.isEntering) {
|
954 | eventGenerator.enterNode(currentNode);
|
955 | } else {
|
956 | eventGenerator.leaveNode(currentNode);
|
957 | }
|
958 | } catch (err) {
|
959 | err.currentNode = currentNode;
|
960 | throw err;
|
961 | }
|
962 | });
|
963 |
|
964 | return lintingProblems;
|
965 | }
|
966 |
|
967 | /**
|
968 | * Ensure the source code to be a string.
|
969 | * @param {string|SourceCode} textOrSourceCode The text or source code object.
|
970 | * @returns {string} The source code text.
|
971 | */
|
972 | function ensureText(textOrSourceCode) {
|
973 | if (typeof textOrSourceCode === "object") {
|
974 | const { hasBOM, text } = textOrSourceCode;
|
975 | const bom = hasBOM ? "\uFEFF" : "";
|
976 |
|
977 | return bom + text;
|
978 | }
|
979 |
|
980 | return String(textOrSourceCode);
|
981 | }
|
982 |
|
983 | /**
|
984 | * Get an environment.
|
985 | * @param {LinterInternalSlots} slots The internal slots of Linter.
|
986 | * @param {string} envId The environment ID to get.
|
987 | * @returns {Environment|null} The environment.
|
988 | */
|
989 | function getEnv(slots, envId) {
|
990 | return (
|
991 | (slots.lastConfigArray && slots.lastConfigArray.pluginEnvironments.get(envId)) ||
|
992 | BuiltInEnvironments.get(envId) ||
|
993 | null
|
994 | );
|
995 | }
|
996 |
|
997 | /**
|
998 | * Get a rule.
|
999 | * @param {LinterInternalSlots} slots The internal slots of Linter.
|
1000 | * @param {string} ruleId The rule ID to get.
|
1001 | * @returns {Rule|null} The rule.
|
1002 | */
|
1003 | function getRule(slots, ruleId) {
|
1004 | return (
|
1005 | (slots.lastConfigArray && slots.lastConfigArray.pluginRules.get(ruleId)) ||
|
1006 | slots.ruleMap.get(ruleId)
|
1007 | );
|
1008 | }
|
1009 |
|
1010 | /**
|
1011 | * Normalize the value of the cwd
|
1012 | * @param {string | undefined} cwd raw value of the cwd, path to a directory that should be considered as the current working directory, can be undefined.
|
1013 | * @returns {string | undefined} normalized cwd
|
1014 | */
|
1015 | function normalizeCwd(cwd) {
|
1016 | if (cwd) {
|
1017 | return cwd;
|
1018 | }
|
1019 | if (typeof process === "object") {
|
1020 | return process.cwd();
|
1021 | }
|
1022 |
|
1023 | // It's more explicit to assign the undefined
|
1024 | // eslint-disable-next-line no-undefined
|
1025 | return undefined;
|
1026 | }
|
1027 |
|
1028 | /**
|
1029 | * The map to store private data.
|
1030 | * @type {WeakMap<Linter, LinterInternalSlots>}
|
1031 | */
|
1032 | const internalSlotsMap = new WeakMap();
|
1033 |
|
1034 | //------------------------------------------------------------------------------
|
1035 | // Public Interface
|
1036 | //------------------------------------------------------------------------------
|
1037 |
|
1038 | /**
|
1039 | * Object that is responsible for verifying JavaScript text
|
1040 | * @name eslint
|
1041 | */
|
1042 | class Linter {
|
1043 |
|
1044 | /**
|
1045 | * Initialize the Linter.
|
1046 | * @param {Object} [config] the config object
|
1047 | * @param {string} [config.cwd] path to a directory that should be considered as the current working directory, can be undefined.
|
1048 | */
|
1049 | constructor({ cwd } = {}) {
|
1050 | internalSlotsMap.set(this, {
|
1051 | cwd: normalizeCwd(cwd),
|
1052 | lastConfigArray: null,
|
1053 | lastSourceCode: null,
|
1054 | parserMap: new Map([["espree", espree]]),
|
1055 | ruleMap: new Rules()
|
1056 | });
|
1057 |
|
1058 | this.version = pkg.version;
|
1059 | }
|
1060 |
|
1061 | /**
|
1062 | * Getter for package version.
|
1063 | * @static
|
1064 | * @returns {string} The version from package.json.
|
1065 | */
|
1066 | static get version() {
|
1067 | return pkg.version;
|
1068 | }
|
1069 |
|
1070 | /**
|
1071 | * Same as linter.verify, except without support for processors.
|
1072 | * @param {string|SourceCode} textOrSourceCode The text to parse or a SourceCode object.
|
1073 | * @param {ConfigData} providedConfig An ESLintConfig instance to configure everything.
|
1074 | * @param {VerifyOptions} [providedOptions] The optional filename of the file being checked.
|
1075 | * @returns {LintMessage[]} The results as an array of messages or an empty array if no messages.
|
1076 | */
|
1077 | _verifyWithoutProcessors(textOrSourceCode, providedConfig, providedOptions) {
|
1078 | const slots = internalSlotsMap.get(this);
|
1079 | const config = providedConfig || {};
|
1080 | const options = normalizeVerifyOptions(providedOptions, config);
|
1081 | let text;
|
1082 |
|
1083 | // evaluate arguments
|
1084 | if (typeof textOrSourceCode === "string") {
|
1085 | slots.lastSourceCode = null;
|
1086 | text = textOrSourceCode;
|
1087 | } else {
|
1088 | slots.lastSourceCode = textOrSourceCode;
|
1089 | text = textOrSourceCode.text;
|
1090 | }
|
1091 |
|
1092 | // Resolve parser.
|
1093 | let parserName = DEFAULT_PARSER_NAME;
|
1094 | let parser = espree;
|
1095 |
|
1096 | if (typeof config.parser === "object" && config.parser !== null) {
|
1097 | parserName = config.parser.filePath;
|
1098 | parser = config.parser.definition;
|
1099 | } else if (typeof config.parser === "string") {
|
1100 | if (!slots.parserMap.has(config.parser)) {
|
1101 | return [{
|
1102 | ruleId: null,
|
1103 | fatal: true,
|
1104 | severity: 2,
|
1105 | message: `Configured parser '${config.parser}' was not found.`,
|
1106 | line: 0,
|
1107 | column: 0
|
1108 | }];
|
1109 | }
|
1110 | parserName = config.parser;
|
1111 | parser = slots.parserMap.get(config.parser);
|
1112 | }
|
1113 |
|
1114 | // search and apply "eslint-env *".
|
1115 | const envInFile = options.allowInlineConfig && !options.warnInlineConfig
|
1116 | ? findEslintEnv(text)
|
1117 | : {};
|
1118 | const resolvedEnvConfig = Object.assign({ builtin: true }, config.env, envInFile);
|
1119 | const enabledEnvs = Object.keys(resolvedEnvConfig)
|
1120 | .filter(envName => resolvedEnvConfig[envName])
|
1121 | .map(envName => getEnv(slots, envName))
|
1122 | .filter(env => env);
|
1123 |
|
1124 | const parserOptions = resolveParserOptions(parserName, config.parserOptions || {}, enabledEnvs);
|
1125 | const configuredGlobals = resolveGlobals(config.globals || {}, enabledEnvs);
|
1126 | const settings = config.settings || {};
|
1127 |
|
1128 | if (!slots.lastSourceCode) {
|
1129 | const parseResult = parse(
|
1130 | text,
|
1131 | parser,
|
1132 | parserOptions,
|
1133 | options.filename
|
1134 | );
|
1135 |
|
1136 | if (!parseResult.success) {
|
1137 | return [parseResult.error];
|
1138 | }
|
1139 |
|
1140 | slots.lastSourceCode = parseResult.sourceCode;
|
1141 | } else {
|
1142 |
|
1143 | /*
|
1144 | * If the given source code object as the first argument does not have scopeManager, analyze the scope.
|
1145 | * This is for backward compatibility (SourceCode is frozen so it cannot rebind).
|
1146 | */
|
1147 | if (!slots.lastSourceCode.scopeManager) {
|
1148 | slots.lastSourceCode = new SourceCode({
|
1149 | text: slots.lastSourceCode.text,
|
1150 | ast: slots.lastSourceCode.ast,
|
1151 | parserServices: slots.lastSourceCode.parserServices,
|
1152 | visitorKeys: slots.lastSourceCode.visitorKeys,
|
1153 | scopeManager: analyzeScope(slots.lastSourceCode.ast, parserOptions)
|
1154 | });
|
1155 | }
|
1156 | }
|
1157 |
|
1158 | const sourceCode = slots.lastSourceCode;
|
1159 | const commentDirectives = options.allowInlineConfig
|
1160 | ? getDirectiveComments(options.filename, sourceCode.ast, ruleId => getRule(slots, ruleId), options.warnInlineConfig)
|
1161 | : { configuredRules: {}, enabledGlobals: {}, exportedVariables: {}, problems: [], disableDirectives: [] };
|
1162 |
|
1163 | // augment global scope with declared global variables
|
1164 | addDeclaredGlobals(
|
1165 | sourceCode.scopeManager.scopes[0],
|
1166 | configuredGlobals,
|
1167 | { exportedVariables: commentDirectives.exportedVariables, enabledGlobals: commentDirectives.enabledGlobals }
|
1168 | );
|
1169 |
|
1170 | const configuredRules = Object.assign({}, config.rules, commentDirectives.configuredRules);
|
1171 |
|
1172 | let lintingProblems;
|
1173 |
|
1174 | try {
|
1175 | lintingProblems = runRules(
|
1176 | sourceCode,
|
1177 | configuredRules,
|
1178 | ruleId => getRule(slots, ruleId),
|
1179 | parserOptions,
|
1180 | parserName,
|
1181 | settings,
|
1182 | options.filename,
|
1183 | options.disableFixes,
|
1184 | slots.cwd
|
1185 | );
|
1186 | } catch (err) {
|
1187 | err.message += `\nOccurred while linting ${options.filename}`;
|
1188 | debug("An error occurred while traversing");
|
1189 | debug("Filename:", options.filename);
|
1190 | if (err.currentNode) {
|
1191 | const { line } = err.currentNode.loc.start;
|
1192 |
|
1193 | debug("Line:", line);
|
1194 | err.message += `:${line}`;
|
1195 | }
|
1196 | debug("Parser Options:", parserOptions);
|
1197 | debug("Parser Path:", parserName);
|
1198 | debug("Settings:", settings);
|
1199 | throw err;
|
1200 | }
|
1201 |
|
1202 | return applyDisableDirectives({
|
1203 | directives: commentDirectives.disableDirectives,
|
1204 | problems: lintingProblems
|
1205 | .concat(commentDirectives.problems)
|
1206 | .sort((problemA, problemB) => problemA.line - problemB.line || problemA.column - problemB.column),
|
1207 | reportUnusedDisableDirectives: options.reportUnusedDisableDirectives
|
1208 | });
|
1209 | }
|
1210 |
|
1211 | /**
|
1212 | * Verifies the text against the rules specified by the second argument.
|
1213 | * @param {string|SourceCode} textOrSourceCode The text to parse or a SourceCode object.
|
1214 | * @param {ConfigData|ConfigArray} config An ESLintConfig instance to configure everything.
|
1215 | * @param {(string|(VerifyOptions&ProcessorOptions))} [filenameOrOptions] The optional filename of the file being checked.
|
1216 | * If this is not set, the filename will default to '<input>' in the rule context. If
|
1217 | * an object, then it has "filename", "allowInlineConfig", and some properties.
|
1218 | * @returns {LintMessage[]} The results as an array of messages or an empty array if no messages.
|
1219 | */
|
1220 | verify(textOrSourceCode, config, filenameOrOptions) {
|
1221 | debug("Verify");
|
1222 | const options = typeof filenameOrOptions === "string"
|
1223 | ? { filename: filenameOrOptions }
|
1224 | : filenameOrOptions || {};
|
1225 |
|
1226 | // CLIEngine passes a `ConfigArray` object.
|
1227 | if (config && typeof config.extractConfig === "function") {
|
1228 | return this._verifyWithConfigArray(textOrSourceCode, config, options);
|
1229 | }
|
1230 |
|
1231 | /*
|
1232 | * `Linter` doesn't support `overrides` property in configuration.
|
1233 | * So we cannot apply multiple processors.
|
1234 | */
|
1235 | if (options.preprocess || options.postprocess) {
|
1236 | return this._verifyWithProcessor(textOrSourceCode, config, options);
|
1237 | }
|
1238 | return this._verifyWithoutProcessors(textOrSourceCode, config, options);
|
1239 | }
|
1240 |
|
1241 | /**
|
1242 | * Verify a given code with `ConfigArray`.
|
1243 | * @param {string|SourceCode} textOrSourceCode The source code.
|
1244 | * @param {ConfigArray} configArray The config array.
|
1245 | * @param {VerifyOptions&ProcessorOptions} options The options.
|
1246 | * @returns {LintMessage[]} The found problems.
|
1247 | */
|
1248 | _verifyWithConfigArray(textOrSourceCode, configArray, options) {
|
1249 | debug("With ConfigArray: %s", options.filename);
|
1250 |
|
1251 | // Store the config array in order to get plugin envs and rules later.
|
1252 | internalSlotsMap.get(this).lastConfigArray = configArray;
|
1253 |
|
1254 | // Extract the final config for this file.
|
1255 | const config = configArray.extractConfig(options.filename);
|
1256 | const processor =
|
1257 | config.processor &&
|
1258 | configArray.pluginProcessors.get(config.processor);
|
1259 |
|
1260 | // Verify.
|
1261 | if (processor) {
|
1262 | debug("Apply the processor: %o", config.processor);
|
1263 | const { preprocess, postprocess, supportsAutofix } = processor;
|
1264 | const disableFixes = options.disableFixes || !supportsAutofix;
|
1265 |
|
1266 | return this._verifyWithProcessor(
|
1267 | textOrSourceCode,
|
1268 | config,
|
1269 | { ...options, disableFixes, postprocess, preprocess },
|
1270 | configArray
|
1271 | );
|
1272 | }
|
1273 | return this._verifyWithoutProcessors(textOrSourceCode, config, options);
|
1274 | }
|
1275 |
|
1276 | /**
|
1277 | * Verify with a processor.
|
1278 | * @param {string|SourceCode} textOrSourceCode The source code.
|
1279 | * @param {ConfigData|ExtractedConfig} config The config array.
|
1280 | * @param {VerifyOptions&ProcessorOptions} options The options.
|
1281 | * @param {ConfigArray} [configForRecursive] The `ConfigArray` object to apply multiple processors recursively.
|
1282 | * @returns {LintMessage[]} The found problems.
|
1283 | */
|
1284 | _verifyWithProcessor(textOrSourceCode, config, options, configForRecursive) {
|
1285 | const filename = options.filename || "<input>";
|
1286 | const filenameToExpose = normalizeFilename(filename);
|
1287 | const text = ensureText(textOrSourceCode);
|
1288 | const preprocess = options.preprocess || (rawText => [rawText]);
|
1289 | const postprocess = options.postprocess || lodash.flatten;
|
1290 | const filterCodeBlock =
|
1291 | options.filterCodeBlock ||
|
1292 | (blockFilename => blockFilename.endsWith(".js"));
|
1293 | const originalExtname = path.extname(filename);
|
1294 | const messageLists = preprocess(text, filenameToExpose).map((block, i) => {
|
1295 | debug("A code block was found: %o", block.filename || "(unnamed)");
|
1296 |
|
1297 | // Keep the legacy behavior.
|
1298 | if (typeof block === "string") {
|
1299 | return this._verifyWithoutProcessors(block, config, options);
|
1300 | }
|
1301 |
|
1302 | const blockText = block.text;
|
1303 | const blockName = path.join(filename, `${i}_${block.filename}`);
|
1304 |
|
1305 | // Skip this block if filtered.
|
1306 | if (!filterCodeBlock(blockName, blockText)) {
|
1307 | debug("This code block was skipped.");
|
1308 | return [];
|
1309 | }
|
1310 |
|
1311 | // Resolve configuration again if the file extension was changed.
|
1312 | if (configForRecursive && path.extname(blockName) !== originalExtname) {
|
1313 | debug("Resolving configuration again because the file extension was changed.");
|
1314 | return this._verifyWithConfigArray(
|
1315 | blockText,
|
1316 | configForRecursive,
|
1317 | { ...options, filename: blockName }
|
1318 | );
|
1319 | }
|
1320 |
|
1321 | // Does lint.
|
1322 | return this._verifyWithoutProcessors(
|
1323 | blockText,
|
1324 | config,
|
1325 | { ...options, filename: blockName }
|
1326 | );
|
1327 | });
|
1328 |
|
1329 | return postprocess(messageLists, filenameToExpose);
|
1330 | }
|
1331 |
|
1332 | /**
|
1333 | * Gets the SourceCode object representing the parsed source.
|
1334 | * @returns {SourceCode} The SourceCode object.
|
1335 | */
|
1336 | getSourceCode() {
|
1337 | return internalSlotsMap.get(this).lastSourceCode;
|
1338 | }
|
1339 |
|
1340 | /**
|
1341 | * Defines a new linting rule.
|
1342 | * @param {string} ruleId A unique rule identifier
|
1343 | * @param {Function | Rule} ruleModule Function from context to object mapping AST node types to event handlers
|
1344 | * @returns {void}
|
1345 | */
|
1346 | defineRule(ruleId, ruleModule) {
|
1347 | internalSlotsMap.get(this).ruleMap.define(ruleId, ruleModule);
|
1348 | }
|
1349 |
|
1350 | /**
|
1351 | * Defines many new linting rules.
|
1352 | * @param {Record<string, Function | Rule>} rulesToDefine map from unique rule identifier to rule
|
1353 | * @returns {void}
|
1354 | */
|
1355 | defineRules(rulesToDefine) {
|
1356 | Object.getOwnPropertyNames(rulesToDefine).forEach(ruleId => {
|
1357 | this.defineRule(ruleId, rulesToDefine[ruleId]);
|
1358 | });
|
1359 | }
|
1360 |
|
1361 | /**
|
1362 | * Gets an object with all loaded rules.
|
1363 | * @returns {Map<string, Rule>} All loaded rules
|
1364 | */
|
1365 | getRules() {
|
1366 | const { lastConfigArray, ruleMap } = internalSlotsMap.get(this);
|
1367 |
|
1368 | return new Map(function *() {
|
1369 | yield* ruleMap;
|
1370 |
|
1371 | if (lastConfigArray) {
|
1372 | yield* lastConfigArray.pluginRules;
|
1373 | }
|
1374 | }());
|
1375 | }
|
1376 |
|
1377 | /**
|
1378 | * Define a new parser module
|
1379 | * @param {string} parserId Name of the parser
|
1380 | * @param {Parser} parserModule The parser object
|
1381 | * @returns {void}
|
1382 | */
|
1383 | defineParser(parserId, parserModule) {
|
1384 | internalSlotsMap.get(this).parserMap.set(parserId, parserModule);
|
1385 | }
|
1386 |
|
1387 | /**
|
1388 | * Performs multiple autofix passes over the text until as many fixes as possible
|
1389 | * have been applied.
|
1390 | * @param {string} text The source text to apply fixes to.
|
1391 | * @param {ConfigData|ConfigArray} config The ESLint config object to use.
|
1392 | * @param {VerifyOptions&ProcessorOptions&FixOptions} options The ESLint options object to use.
|
1393 | * @returns {{fixed:boolean,messages:LintMessage[],output:string}} The result of the fix operation as returned from the
|
1394 | * SourceCodeFixer.
|
1395 | */
|
1396 | verifyAndFix(text, config, options) {
|
1397 | let messages = [],
|
1398 | fixedResult,
|
1399 | fixed = false,
|
1400 | passNumber = 0,
|
1401 | currentText = text;
|
1402 | const debugTextDescription = options && options.filename || `${text.slice(0, 10)}...`;
|
1403 | const shouldFix = options && typeof options.fix !== "undefined" ? options.fix : true;
|
1404 |
|
1405 | /**
|
1406 | * This loop continues until one of the following is true:
|
1407 | *
|
1408 | * 1. No more fixes have been applied.
|
1409 | * 2. Ten passes have been made.
|
1410 | *
|
1411 | * That means anytime a fix is successfully applied, there will be another pass.
|
1412 | * Essentially, guaranteeing a minimum of two passes.
|
1413 | */
|
1414 | do {
|
1415 | passNumber++;
|
1416 |
|
1417 | debug(`Linting code for ${debugTextDescription} (pass ${passNumber})`);
|
1418 | messages = this.verify(currentText, config, options);
|
1419 |
|
1420 | debug(`Generating fixed text for ${debugTextDescription} (pass ${passNumber})`);
|
1421 | fixedResult = SourceCodeFixer.applyFixes(currentText, messages, shouldFix);
|
1422 |
|
1423 | /*
|
1424 | * stop if there are any syntax errors.
|
1425 | * 'fixedResult.output' is a empty string.
|
1426 | */
|
1427 | if (messages.length === 1 && messages[0].fatal) {
|
1428 | break;
|
1429 | }
|
1430 |
|
1431 | // keep track if any fixes were ever applied - important for return value
|
1432 | fixed = fixed || fixedResult.fixed;
|
1433 |
|
1434 | // update to use the fixed output instead of the original text
|
1435 | currentText = fixedResult.output;
|
1436 |
|
1437 | } while (
|
1438 | fixedResult.fixed &&
|
1439 | passNumber < MAX_AUTOFIX_PASSES
|
1440 | );
|
1441 |
|
1442 | /*
|
1443 | * If the last result had fixes, we need to lint again to be sure we have
|
1444 | * the most up-to-date information.
|
1445 | */
|
1446 | if (fixedResult.fixed) {
|
1447 | fixedResult.messages = this.verify(currentText, config, options);
|
1448 | }
|
1449 |
|
1450 | // ensure the last result properly reflects if fixes were done
|
1451 | fixedResult.fixed = fixed;
|
1452 | fixedResult.output = currentText;
|
1453 |
|
1454 | return fixedResult;
|
1455 | }
|
1456 | }
|
1457 |
|
1458 | module.exports = {
|
1459 | Linter,
|
1460 |
|
1461 | /**
|
1462 | * Get the internal slots of a given Linter instance for tests.
|
1463 | * @param {Linter} instance The Linter instance to get.
|
1464 | * @returns {LinterInternalSlots} The internal slots.
|
1465 | */
|
1466 | getLinterInternalSlots(instance) {
|
1467 | return internalSlotsMap.get(instance);
|
1468 | }
|
1469 | };
|