/
linter.js
2009 lines (1733 loc) · 74.7 KB
/
linter.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/**
* @fileoverview Main Linter Class
* @author Gyandeep Singh
* @author aladdin-add
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const
path = require("path"),
eslintScope = require("eslint-scope"),
evk = require("eslint-visitor-keys"),
espree = require("espree"),
merge = require("lodash.merge"),
pkg = require("../../package.json"),
astUtils = require("../shared/ast-utils"),
{
directivesPattern
} = require("../shared/directives"),
{
Legacy: {
ConfigOps,
ConfigValidator,
environments: BuiltInEnvironments
}
} = require("@eslint/eslintrc/universal"),
Traverser = require("../shared/traverser"),
{ SourceCode } = require("../source-code"),
CodePathAnalyzer = require("./code-path-analysis/code-path-analyzer"),
applyDisableDirectives = require("./apply-disable-directives"),
ConfigCommentParser = require("./config-comment-parser"),
NodeEventGenerator = require("./node-event-generator"),
createReportTranslator = require("./report-translator"),
Rules = require("./rules"),
createEmitter = require("./safe-emitter"),
SourceCodeFixer = require("./source-code-fixer"),
timing = require("./timing"),
ruleReplacements = require("../../conf/replacements.json");
const { getRuleFromConfig } = require("../config/flat-config-helpers");
const { FlatConfigArray } = require("../config/flat-config-array");
const debug = require("debug")("eslint:linter");
const MAX_AUTOFIX_PASSES = 10;
const DEFAULT_PARSER_NAME = "espree";
const DEFAULT_ECMA_VERSION = 5;
const commentParser = new ConfigCommentParser();
const DEFAULT_ERROR_LOC = { start: { line: 1, column: 0 }, end: { line: 1, column: 1 } };
const parserSymbol = Symbol.for("eslint.RuleTester.parser");
const globals = require("../../conf/globals");
//------------------------------------------------------------------------------
// Typedefs
//------------------------------------------------------------------------------
/** @typedef {InstanceType<import("../cli-engine/config-array").ConfigArray>} ConfigArray */
/** @typedef {InstanceType<import("../cli-engine/config-array").ExtractedConfig>} ExtractedConfig */
/** @typedef {import("../shared/types").ConfigData} ConfigData */
/** @typedef {import("../shared/types").Environment} Environment */
/** @typedef {import("../shared/types").GlobalConf} GlobalConf */
/** @typedef {import("../shared/types").LintMessage} LintMessage */
/** @typedef {import("../shared/types").SuppressedLintMessage} SuppressedLintMessage */
/** @typedef {import("../shared/types").ParserOptions} ParserOptions */
/** @typedef {import("../shared/types").LanguageOptions} LanguageOptions */
/** @typedef {import("../shared/types").Processor} Processor */
/** @typedef {import("../shared/types").Rule} Rule */
/* eslint-disable jsdoc/valid-types -- https://github.com/jsdoc-type-pratt-parser/jsdoc-type-pratt-parser/issues/4#issuecomment-778805577 */
/**
* @template T
* @typedef {{ [P in keyof T]-?: T[P] }} Required
*/
/* eslint-enable jsdoc/valid-types -- https://github.com/jsdoc-type-pratt-parser/jsdoc-type-pratt-parser/issues/4#issuecomment-778805577 */
/**
* @typedef {Object} DisableDirective
* @property {("disable"|"enable"|"disable-line"|"disable-next-line")} type Type of directive
* @property {number} line The line number
* @property {number} column The column number
* @property {(string|null)} ruleId The rule ID
* @property {string} justification The justification of directive
*/
/**
* The private data for `Linter` instance.
* @typedef {Object} LinterInternalSlots
* @property {ConfigArray|null} lastConfigArray The `ConfigArray` instance that the last `verify()` call used.
* @property {SourceCode|null} lastSourceCode The `SourceCode` instance that the last `verify()` call used.
* @property {SuppressedLintMessage[]} lastSuppressedMessages The `SuppressedLintMessage[]` instance that the last `verify()` call produced.
* @property {Map<string, Parser>} parserMap The loaded parsers.
* @property {Rules} ruleMap The loaded rules.
*/
/**
* @typedef {Object} VerifyOptions
* @property {boolean} [allowInlineConfig] Allow/disallow inline comments' ability
* to change config once it is set. Defaults to true if not supplied.
* Useful if you want to validate JS without comments overriding rules.
* @property {boolean} [disableFixes] if `true` then the linter doesn't make `fix`
* properties into the lint result.
* @property {string} [filename] the filename of the source code.
* @property {boolean | "off" | "warn" | "error"} [reportUnusedDisableDirectives] Adds reported errors for
* unused `eslint-disable` directives.
*/
/**
* @typedef {Object} ProcessorOptions
* @property {(filename:string, text:string) => boolean} [filterCodeBlock] the
* predicate function that selects adopt code blocks.
* @property {Processor.postprocess} [postprocess] postprocessor for report
* messages. If provided, this should accept an array of the message lists
* for each code block returned from the preprocessor, apply a mapping to
* the messages as appropriate, and return a one-dimensional array of
* messages.
* @property {Processor.preprocess} [preprocess] preprocessor for source text.
* If provided, this should accept a string of source text, and return an
* array of code blocks to lint.
*/
/**
* @typedef {Object} FixOptions
* @property {boolean | ((message: LintMessage) => boolean)} [fix] Determines
* whether fixes should be applied.
*/
/**
* @typedef {Object} InternalOptions
* @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.
* @property {"off" | "warn" | "error"} reportUnusedDisableDirectives (boolean values were normalized)
*/
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Determines if a given object is Espree.
* @param {Object} parser The parser to check.
* @returns {boolean} True if the parser is Espree or false if not.
*/
function isEspree(parser) {
return !!(parser === espree || parser[parserSymbol] === espree);
}
/**
* Retrieves globals for the given ecmaVersion.
* @param {number} ecmaVersion The version to retrieve globals for.
* @returns {Object} The globals for the given ecmaVersion.
*/
function getGlobalsForEcmaVersion(ecmaVersion) {
switch (ecmaVersion) {
case 3:
return globals.es3;
case 5:
return globals.es5;
default:
if (ecmaVersion < 2015) {
return globals[`es${ecmaVersion + 2009}`];
}
return globals[`es${ecmaVersion}`];
}
}
/**
* Ensures that variables representing built-in properties of the Global Object,
* and any globals declared by special block comments, are present in the global
* scope.
* @param {Scope} globalScope The global scope.
* @param {Object} configGlobals The globals declared in configuration
* @param {{exportedVariables: Object, enabledGlobals: Object}} commentDirectives Directives from comment configuration
* @returns {void}
*/
function addDeclaredGlobals(globalScope, configGlobals, { exportedVariables, enabledGlobals }) {
// Define configured global variables.
for (const id of new Set([...Object.keys(configGlobals), ...Object.keys(enabledGlobals)])) {
/*
* `ConfigOps.normalizeConfigGlobal` will throw an error if a configured global value is invalid. However, these errors would
* typically be caught when validating a config anyway (validity for inline global comments is checked separately).
*/
const configValue = configGlobals[id] === void 0 ? void 0 : ConfigOps.normalizeConfigGlobal(configGlobals[id]);
const commentValue = enabledGlobals[id] && enabledGlobals[id].value;
const value = commentValue || configValue;
const sourceComments = enabledGlobals[id] && enabledGlobals[id].comments;
if (value === "off") {
continue;
}
let variable = globalScope.set.get(id);
if (!variable) {
variable = new eslintScope.Variable(id, globalScope);
globalScope.variables.push(variable);
globalScope.set.set(id, variable);
}
variable.eslintImplicitGlobalSetting = configValue;
variable.eslintExplicitGlobal = sourceComments !== void 0;
variable.eslintExplicitGlobalComments = sourceComments;
variable.writeable = (value === "writable");
}
// mark all exported variables as such
Object.keys(exportedVariables).forEach(name => {
const variable = globalScope.set.get(name);
if (variable) {
variable.eslintUsed = true;
variable.eslintExported = true;
}
});
/*
* "through" contains all references which definitions cannot be found.
* Since we augment the global scope using configuration, we need to update
* references and remove the ones that were added by configuration.
*/
globalScope.through = globalScope.through.filter(reference => {
const name = reference.identifier.name;
const variable = globalScope.set.get(name);
if (variable) {
/*
* Links the variable and the reference.
* And this reference is removed from `Scope#through`.
*/
reference.resolved = variable;
variable.references.push(reference);
return false;
}
return true;
});
}
/**
* creates a missing-rule message.
* @param {string} ruleId the ruleId to create
* @returns {string} created error message
* @private
*/
function createMissingRuleMessage(ruleId) {
return Object.prototype.hasOwnProperty.call(ruleReplacements.rules, ruleId)
? `Rule '${ruleId}' was removed and replaced by: ${ruleReplacements.rules[ruleId].join(", ")}`
: `Definition for rule '${ruleId}' was not found.`;
}
/**
* creates a linting problem
* @param {Object} options to create linting error
* @param {string} [options.ruleId] the ruleId to report
* @param {Object} [options.loc] the loc to report
* @param {string} [options.message] the error message to report
* @param {string} [options.severity] the error message to report
* @returns {LintMessage} created problem, returns a missing-rule problem if only provided ruleId.
* @private
*/
function createLintingProblem(options) {
const {
ruleId = null,
loc = DEFAULT_ERROR_LOC,
message = createMissingRuleMessage(options.ruleId),
severity = 2
} = options;
return {
ruleId,
message,
line: loc.start.line,
column: loc.start.column + 1,
endLine: loc.end.line,
endColumn: loc.end.column + 1,
severity,
nodeType: null
};
}
/**
* Creates a collection of disable directives from a comment
* @param {Object} options to create disable directives
* @param {("disable"|"enable"|"disable-line"|"disable-next-line")} options.type The type of directive comment
* @param {token} options.commentToken The Comment token
* @param {string} options.value The value after the directive in the comment
* comment specified no specific rules, so it applies to all rules (e.g. `eslint-disable`)
* @param {string} options.justification The justification of the directive
* @param {function(string): {create: Function}} options.ruleMapper A map from rule IDs to defined rules
* @returns {Object} Directives and problems from the comment
*/
function createDisableDirectives(options) {
const { commentToken, type, value, justification, ruleMapper } = options;
const ruleIds = Object.keys(commentParser.parseListConfig(value));
const directiveRules = ruleIds.length ? ruleIds : [null];
const result = {
directives: [], // valid disable directives
directiveProblems: [] // problems in directives
};
const parentComment = { commentToken, ruleIds };
for (const ruleId of directiveRules) {
// push to directives, if the rule is defined(including null, e.g. /*eslint enable*/)
if (ruleId === null || !!ruleMapper(ruleId)) {
if (type === "disable-next-line") {
result.directives.push({
parentComment,
type,
line: commentToken.loc.end.line,
column: commentToken.loc.end.column + 1,
ruleId,
justification
});
} else {
result.directives.push({
parentComment,
type,
line: commentToken.loc.start.line,
column: commentToken.loc.start.column + 1,
ruleId,
justification
});
}
} else {
result.directiveProblems.push(createLintingProblem({ ruleId, loc: commentToken.loc }));
}
}
return result;
}
/**
* Extract the directive and the justification from a given directive comment and trim them.
* @param {string} value The comment text to extract.
* @returns {{directivePart: string, justificationPart: string}} The extracted directive and justification.
*/
function extractDirectiveComment(value) {
const match = /\s-{2,}\s/u.exec(value);
if (!match) {
return { directivePart: value.trim(), justificationPart: "" };
}
const directive = value.slice(0, match.index).trim();
const justification = value.slice(match.index + match[0].length).trim();
return { directivePart: directive, justificationPart: justification };
}
/**
* Parses comments in file to extract file-specific config of rules, globals
* and environments and merges them with global config; also code blocks
* where reporting is disabled or enabled and merges them with reporting config.
* @param {ASTNode} ast The top node of the AST.
* @param {function(string): {create: Function}} ruleMapper A map from rule IDs to defined rules
* @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.
* @returns {{configuredRules: Object, enabledGlobals: {value:string,comment:Token}[], exportedVariables: Object, problems: Problem[], disableDirectives: DisableDirective[]}}
* A collection of the directive comments that were found, along with any problems that occurred when parsing
*/
function getDirectiveComments(ast, ruleMapper, warnInlineConfig) {
const configuredRules = {};
const enabledGlobals = Object.create(null);
const exportedVariables = {};
const problems = [];
const disableDirectives = [];
const validator = new ConfigValidator({
builtInRules: Rules
});
ast.comments.filter(token => token.type !== "Shebang").forEach(comment => {
const { directivePart, justificationPart } = extractDirectiveComment(comment.value);
const match = directivesPattern.exec(directivePart);
if (!match) {
return;
}
const directiveText = match[1];
const lineCommentSupported = /^eslint-disable-(next-)?line$/u.test(directiveText);
if (comment.type === "Line" && !lineCommentSupported) {
return;
}
if (warnInlineConfig) {
const kind = comment.type === "Block" ? `/*${directiveText}*/` : `//${directiveText}`;
problems.push(createLintingProblem({
ruleId: null,
message: `'${kind}' has no effect because you have 'noInlineConfig' setting in ${warnInlineConfig}.`,
loc: comment.loc,
severity: 1
}));
return;
}
if (directiveText === "eslint-disable-line" && comment.loc.start.line !== comment.loc.end.line) {
const message = `${directiveText} comment should not span multiple lines.`;
problems.push(createLintingProblem({
ruleId: null,
message,
loc: comment.loc
}));
return;
}
const directiveValue = directivePart.slice(match.index + directiveText.length);
switch (directiveText) {
case "eslint-disable":
case "eslint-enable":
case "eslint-disable-next-line":
case "eslint-disable-line": {
const directiveType = directiveText.slice("eslint-".length);
const options = { commentToken: comment, type: directiveType, value: directiveValue, justification: justificationPart, ruleMapper };
const { directives, directiveProblems } = createDisableDirectives(options);
disableDirectives.push(...directives);
problems.push(...directiveProblems);
break;
}
case "exported":
Object.assign(exportedVariables, commentParser.parseStringConfig(directiveValue, comment));
break;
case "globals":
case "global":
for (const [id, { value }] of Object.entries(commentParser.parseStringConfig(directiveValue, comment))) {
let normalizedValue;
try {
normalizedValue = ConfigOps.normalizeConfigGlobal(value);
} catch (err) {
problems.push(createLintingProblem({
ruleId: null,
loc: comment.loc,
message: err.message
}));
continue;
}
if (enabledGlobals[id]) {
enabledGlobals[id].comments.push(comment);
enabledGlobals[id].value = normalizedValue;
} else {
enabledGlobals[id] = {
comments: [comment],
value: normalizedValue
};
}
}
break;
case "eslint": {
const parseResult = commentParser.parseJsonConfig(directiveValue, comment.loc);
if (parseResult.success) {
Object.keys(parseResult.config).forEach(name => {
const rule = ruleMapper(name);
const ruleValue = parseResult.config[name];
if (!rule) {
problems.push(createLintingProblem({ ruleId: name, loc: comment.loc }));
return;
}
try {
validator.validateRuleOptions(rule, name, ruleValue);
} catch (err) {
problems.push(createLintingProblem({
ruleId: name,
message: err.message,
loc: comment.loc
}));
// do not apply the config, if found invalid options.
return;
}
configuredRules[name] = ruleValue;
});
} else {
problems.push(parseResult.error);
}
break;
}
// no default
}
});
return {
configuredRules,
enabledGlobals,
exportedVariables,
problems,
disableDirectives
};
}
/**
* Normalize ECMAScript version from the initial config
* @param {Parser} parser The parser which uses this options.
* @param {number} ecmaVersion ECMAScript version from the initial config
* @returns {number} normalized ECMAScript version
*/
function normalizeEcmaVersion(parser, ecmaVersion) {
if (isEspree(parser)) {
if (ecmaVersion === "latest") {
return espree.latestEcmaVersion;
}
}
/*
* Calculate ECMAScript edition number from official year version starting with
* ES2015, which corresponds with ES6 (or a difference of 2009).
*/
return ecmaVersion >= 2015 ? ecmaVersion - 2009 : ecmaVersion;
}
/**
* Normalize ECMAScript version from the initial config into languageOptions (year)
* format.
* @param {any} [ecmaVersion] ECMAScript version from the initial config
* @returns {number} normalized ECMAScript version
*/
function normalizeEcmaVersionForLanguageOptions(ecmaVersion) {
switch (ecmaVersion) {
case 3:
return 3;
// void 0 = no ecmaVersion specified so use the default
case 5:
case void 0:
return 5;
default:
if (typeof ecmaVersion === "number") {
return ecmaVersion >= 2015 ? ecmaVersion : ecmaVersion + 2009;
}
}
/*
* We default to the latest supported ecmaVersion for everything else.
* Remember, this is for languageOptions.ecmaVersion, which sets the version
* that is used for a number of processes inside of ESLint. It's normally
* safe to assume people want the latest unless otherwise specified.
*/
return espree.latestEcmaVersion + 2009;
}
const eslintEnvPattern = /\/\*\s*eslint-env\s(.+?)(?:\*\/|$)/gsu;
/**
* Checks whether or not there is a comment which has "eslint-env *" in a given text.
* @param {string} text A source code text to check.
* @returns {Object|null} A result of parseListConfig() with "eslint-env *" comment.
*/
function findEslintEnv(text) {
let match, retv;
eslintEnvPattern.lastIndex = 0;
while ((match = eslintEnvPattern.exec(text)) !== null) {
if (match[0].endsWith("*/")) {
retv = Object.assign(
retv || {},
commentParser.parseListConfig(extractDirectiveComment(match[1]).directivePart)
);
}
}
return retv;
}
/**
* Convert "/path/to/<text>" to "<text>".
* `CLIEngine#executeOnText()` method gives "/path/to/<text>" if the filename
* was omitted because `configArray.extractConfig()` requires an absolute path.
* But the linter should pass `<text>` to `RuleContext#getFilename()` in that
* case.
* Also, code blocks can have their virtual filename. If the parent filename was
* `<text>`, the virtual filename is `<text>/0_foo.js` or something like (i.e.,
* it's not an absolute path).
* @param {string} filename The filename to normalize.
* @returns {string} The normalized filename.
*/
function normalizeFilename(filename) {
const parts = filename.split(path.sep);
const index = parts.lastIndexOf("<text>");
return index === -1 ? filename : parts.slice(index).join(path.sep);
}
/**
* Normalizes the possible options for `linter.verify` and `linter.verifyAndFix` to a
* consistent shape.
* @param {VerifyOptions} providedOptions Options
* @param {ConfigData} config Config.
* @returns {Required<VerifyOptions> & InternalOptions} Normalized options
*/
function normalizeVerifyOptions(providedOptions, config) {
const linterOptions = config.linterOptions || config;
// .noInlineConfig for eslintrc, .linterOptions.noInlineConfig for flat
const disableInlineConfig = linterOptions.noInlineConfig === true;
const ignoreInlineConfig = providedOptions.allowInlineConfig === false;
const configNameOfNoInlineConfig = config.configNameOfNoInlineConfig
? ` (${config.configNameOfNoInlineConfig})`
: "";
let reportUnusedDisableDirectives = providedOptions.reportUnusedDisableDirectives;
if (typeof reportUnusedDisableDirectives === "boolean") {
reportUnusedDisableDirectives = reportUnusedDisableDirectives ? "error" : "off";
}
if (typeof reportUnusedDisableDirectives !== "string") {
reportUnusedDisableDirectives =
linterOptions.reportUnusedDisableDirectives
? "warn" : "off";
}
return {
filename: normalizeFilename(providedOptions.filename || "<input>"),
allowInlineConfig: !ignoreInlineConfig,
warnInlineConfig: disableInlineConfig && !ignoreInlineConfig
? `your config${configNameOfNoInlineConfig}`
: null,
reportUnusedDisableDirectives,
disableFixes: Boolean(providedOptions.disableFixes)
};
}
/**
* Combines the provided parserOptions with the options from environments
* @param {Parser} parser The parser which uses this options.
* @param {ParserOptions} providedOptions The provided 'parserOptions' key in a config
* @param {Environment[]} enabledEnvironments The environments enabled in configuration and with inline comments
* @returns {ParserOptions} Resulting parser options after merge
*/
function resolveParserOptions(parser, providedOptions, enabledEnvironments) {
const parserOptionsFromEnv = enabledEnvironments
.filter(env => env.parserOptions)
.reduce((parserOptions, env) => merge(parserOptions, env.parserOptions), {});
const mergedParserOptions = merge(parserOptionsFromEnv, providedOptions || {});
const isModule = mergedParserOptions.sourceType === "module";
if (isModule) {
/*
* can't have global return inside of modules
* TODO: espree validate parserOptions.globalReturn when sourceType is setting to module.(@aladdin-add)
*/
mergedParserOptions.ecmaFeatures = Object.assign({}, mergedParserOptions.ecmaFeatures, { globalReturn: false });
}
mergedParserOptions.ecmaVersion = normalizeEcmaVersion(parser, mergedParserOptions.ecmaVersion);
return mergedParserOptions;
}
/**
* Converts parserOptions to languageOptions for backwards compatibility with eslintrc.
* @param {ConfigData} config Config object.
* @param {Object} config.globals Global variable definitions.
* @param {Parser} config.parser The parser to use.
* @param {ParserOptions} config.parserOptions The parserOptions to use.
* @returns {LanguageOptions} The languageOptions equivalent.
*/
function createLanguageOptions({ globals: configuredGlobals, parser, parserOptions }) {
const {
ecmaVersion,
sourceType
} = parserOptions;
return {
globals: configuredGlobals,
ecmaVersion: normalizeEcmaVersionForLanguageOptions(ecmaVersion),
sourceType,
parser,
parserOptions
};
}
/**
* Combines the provided globals object with the globals from environments
* @param {Record<string, GlobalConf>} providedGlobals The 'globals' key in a config
* @param {Environment[]} enabledEnvironments The environments enabled in configuration and with inline comments
* @returns {Record<string, GlobalConf>} The resolved globals object
*/
function resolveGlobals(providedGlobals, enabledEnvironments) {
return Object.assign(
{},
...enabledEnvironments.filter(env => env.globals).map(env => env.globals),
providedGlobals
);
}
/**
* Strips Unicode BOM from a given text.
* @param {string} text A text to strip.
* @returns {string} The stripped text.
*/
function stripUnicodeBOM(text) {
/*
* Check Unicode BOM.
* In JavaScript, string data is stored as UTF-16, so BOM is 0xFEFF.
* http://www.ecma-international.org/ecma-262/6.0/#sec-unicode-format-control-characters
*/
if (text.charCodeAt(0) === 0xFEFF) {
return text.slice(1);
}
return text;
}
/**
* Get the options for a rule (not including severity), if any
* @param {Array|number} ruleConfig rule configuration
* @returns {Array} of rule options, empty Array if none
*/
function getRuleOptions(ruleConfig) {
if (Array.isArray(ruleConfig)) {
return ruleConfig.slice(1);
}
return [];
}
/**
* Analyze scope of the given AST.
* @param {ASTNode} ast The `Program` node to analyze.
* @param {LanguageOptions} languageOptions The parser options.
* @param {Record<string, string[]>} visitorKeys The visitor keys.
* @returns {ScopeManager} The analysis result.
*/
function analyzeScope(ast, languageOptions, visitorKeys) {
const parserOptions = languageOptions.parserOptions;
const ecmaFeatures = parserOptions.ecmaFeatures || {};
const ecmaVersion = languageOptions.ecmaVersion || DEFAULT_ECMA_VERSION;
return eslintScope.analyze(ast, {
ignoreEval: true,
nodejsScope: ecmaFeatures.globalReturn,
impliedStrict: ecmaFeatures.impliedStrict,
ecmaVersion: typeof ecmaVersion === "number" ? ecmaVersion : 6,
sourceType: languageOptions.sourceType || "script",
childVisitorKeys: visitorKeys || evk.KEYS,
fallback: Traverser.getKeys
});
}
/**
* Parses text into an AST. Moved out here because the try-catch prevents
* optimization of functions, so it's best to keep the try-catch as isolated
* as possible
* @param {string} text The text to parse.
* @param {LanguageOptions} languageOptions Options to pass to the parser
* @param {string} filePath The path to the file being parsed.
* @returns {{success: false, error: Problem}|{success: true, sourceCode: SourceCode}}
* An object containing the AST and parser services if parsing was successful, or the error if parsing failed
* @private
*/
function parse(text, languageOptions, filePath) {
const textToParse = stripUnicodeBOM(text).replace(astUtils.shebangPattern, (match, captured) => `//${captured}`);
const { ecmaVersion, sourceType, parser } = languageOptions;
const parserOptions = Object.assign(
{ ecmaVersion, sourceType },
languageOptions.parserOptions,
{
loc: true,
range: true,
raw: true,
tokens: true,
comment: true,
eslintVisitorKeys: true,
eslintScopeManager: true,
filePath
}
);
/*
* Check for parsing errors first. If there's a parsing error, nothing
* else can happen. However, a parsing error does not throw an error
* from this method - it's just considered a fatal error message, a
* problem that ESLint identified just like any other.
*/
try {
debug("Parsing:", filePath);
const parseResult = (typeof parser.parseForESLint === "function")
? parser.parseForESLint(textToParse, parserOptions)
: { ast: parser.parse(textToParse, parserOptions) };
debug("Parsing successful:", filePath);
const ast = parseResult.ast;
const parserServices = parseResult.services || {};
const visitorKeys = parseResult.visitorKeys || evk.KEYS;
debug("Scope analysis:", filePath);
const scopeManager = parseResult.scopeManager || analyzeScope(ast, languageOptions, visitorKeys);
debug("Scope analysis successful:", filePath);
return {
success: true,
/*
* Save all values that `parseForESLint()` returned.
* If a `SourceCode` object is given as the first parameter instead of source code text,
* linter skips the parsing process and reuses the source code object.
* In that case, linter needs all the values that `parseForESLint()` returned.
*/
sourceCode: new SourceCode({
text,
ast,
parserServices,
scopeManager,
visitorKeys
})
};
} catch (ex) {
// If the message includes a leading line number, strip it:
const message = `Parsing error: ${ex.message.replace(/^line \d+:/iu, "").trim()}`;
debug("%s\n%s", message, ex.stack);
return {
success: false,
error: {
ruleId: null,
fatal: true,
severity: 2,
message,
line: ex.lineNumber,
column: ex.column
}
};
}
}
/**
* Runs a rule, and gets its listeners
* @param {Rule} rule A normalized rule with a `create` method
* @param {Context} ruleContext The context that should be passed to the rule
* @throws {any} Any error during the rule's `create`
* @returns {Object} A map of selector listeners provided by the rule
*/
function createRuleListeners(rule, ruleContext) {
try {
return rule.create(ruleContext);
} catch (ex) {
ex.message = `Error while loading rule '${ruleContext.id}': ${ex.message}`;
throw ex;
}
}
// methods that exist on SourceCode object
const DEPRECATED_SOURCECODE_PASSTHROUGHS = {
getSource: "getText",
getSourceLines: "getLines",
getAllComments: "getAllComments",
getNodeByRangeIndex: "getNodeByRangeIndex",
getComments: "getComments",
getCommentsBefore: "getCommentsBefore",
getCommentsAfter: "getCommentsAfter",
getCommentsInside: "getCommentsInside",
getJSDocComment: "getJSDocComment",
getFirstToken: "getFirstToken",
getFirstTokens: "getFirstTokens",
getLastToken: "getLastToken",
getLastTokens: "getLastTokens",
getTokenAfter: "getTokenAfter",
getTokenBefore: "getTokenBefore",
getTokenByRangeStart: "getTokenByRangeStart",
getTokens: "getTokens",
getTokensAfter: "getTokensAfter",
getTokensBefore: "getTokensBefore",
getTokensBetween: "getTokensBetween"
};
const BASE_TRAVERSAL_CONTEXT = Object.freeze(
Object.keys(DEPRECATED_SOURCECODE_PASSTHROUGHS).reduce(
(contextInfo, methodName) =>
Object.assign(contextInfo, {
[methodName](...args) {
return this.getSourceCode()[DEPRECATED_SOURCECODE_PASSTHROUGHS[methodName]](...args);
}
}),
{}
)
);
/**
* Runs the given rules on the given SourceCode object
* @param {SourceCode} sourceCode A SourceCode object for the given text
* @param {Object} configuredRules The rules configuration
* @param {function(string): Rule} ruleMapper A mapper function from rule names to rules
* @param {string | undefined} parserName The name of the parser in the config
* @param {LanguageOptions} languageOptions The options for parsing the code.
* @param {Object} settings The settings that were enabled in the config
* @param {string} filename The reported filename of the code
* @param {boolean} disableFixes If true, it doesn't make `fix` properties.
* @param {string | undefined} cwd cwd of the cli
* @param {string} physicalFilename The full path of the file on disk without any code block information
* @returns {Problem[]} An array of reported problems
*/
function runRules(sourceCode, configuredRules, ruleMapper, parserName, languageOptions, settings, filename, disableFixes, cwd, physicalFilename) {
const emitter = createEmitter();
const nodeQueue = [];
let currentNode = sourceCode.ast;
Traverser.traverse(sourceCode.ast, {
enter(node, parent) {
node.parent = parent;
nodeQueue.push({ isEntering: true, node });
},
leave(node) {
nodeQueue.push({ isEntering: false, node });
},
visitorKeys: sourceCode.visitorKeys
});
/*
* Create a frozen object with the ruleContext properties and methods that are shared by all rules.
* All rule contexts will inherit from this object. This avoids the performance penalty of copying all the
* properties once for each rule.
*/
const sharedTraversalContext = Object.freeze(
Object.assign(
Object.create(BASE_TRAVERSAL_CONTEXT),
{
getAncestors: () => sourceCode.getAncestors(currentNode),
getDeclaredVariables: node => sourceCode.getDeclaredVariables(node),
getCwd: () => cwd,
getFilename: () => filename,
getPhysicalFilename: () => physicalFilename || filename,
getScope: () => sourceCode.getScope(currentNode),
getSourceCode: () => sourceCode,
markVariableAsUsed: name => sourceCode.markVariableAsUsed(name, currentNode),
parserOptions: {
...languageOptions.parserOptions
},
parserPath: parserName,
languageOptions,
parserServices: sourceCode.parserServices,
settings
}
)
);
const lintingProblems = [];
Object.keys(configuredRules).forEach(ruleId => {
const severity = ConfigOps.getRuleSeverity(configuredRules[ruleId]);
// not load disabled rules
if (severity === 0) {
return;
}
const rule = ruleMapper(ruleId);
if (!rule) {
lintingProblems.push(createLintingProblem({ ruleId }));
return;
}
const messageIds = rule.meta && rule.meta.messages;
let reportTranslator = null;
const ruleContext = Object.freeze(
Object.assign(
Object.create(sharedTraversalContext),
{
id: ruleId,
options: getRuleOptions(configuredRules[ruleId]),
report(...args) {
/*
* Create a report translator lazily.
* In a vast majority of cases, any given rule reports zero errors on a given
* piece of code. Creating a translator lazily avoids the performance cost of