-
Notifications
You must be signed in to change notification settings - Fork 1.4k
/
importResolver.ts
2697 lines (2348 loc) · 103 KB
/
importResolver.ts
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
/*
* importResolver.ts
* Copyright (c) Microsoft Corporation.
* Licensed under the MIT license.
* Author: Eric Traut
*
* Provides the logic for resolving imports according to the
* runtime rules of Python.
*/
import type { Dirent } from 'fs';
import { appendArray, flatten, getMapValues, getOrAdd } from '../common/collectionUtils';
import { ConfigOptions, ExecutionEnvironment, matchFileSpecs } from '../common/configOptions';
import { Host } from '../common/host';
import { stubsSuffix } from '../common/pathConsts';
import {
changeAnyExtension,
combinePathComponents,
combinePaths,
containsPath,
ensureTrailingDirectorySeparator,
getDirectoryPath,
getFileExtension,
getFileName,
getFileSystemEntriesFromDirEntries,
getPathComponents,
getRelativePathComponentsFromDirectory,
isDirectory,
isDiskPathRoot,
isFile,
normalizePath,
realCasePath,
resolvePaths,
stripFileExtension,
stripTrailingDirectorySeparator,
tryRealpath,
tryStat,
} from '../common/pathUtils';
import { PythonVersion, versionFromString } from '../common/pythonVersion';
import { ServiceProvider } from '../common/serviceProvider';
import { ServiceKeys } from '../common/serviceProviderExtensions';
import * as StringUtils from '../common/stringUtils';
import { equateStringsCaseInsensitive } from '../common/stringUtils';
import { isIdentifierChar, isIdentifierStartChar } from '../parser/characters';
import { ImplicitImport, ImportResult, ImportType } from './importResult';
import { getDirectoryLeadingDotsPointsTo } from './importStatementUtils';
import { ImportPath, ParentDirectoryCache } from './parentDirectoryCache';
import { PyTypedInfo, getPyTypedInfo } from './pyTypedUtils';
import * as PythonPathUtils from './pythonPathUtils';
import * as SymbolNameUtils from './symbolNameUtils';
import { isDunderName } from './symbolNameUtils';
export interface ImportedModuleDescriptor {
leadingDots: number;
nameParts: string[];
hasTrailingDot?: boolean | undefined;
importedSymbols: Set<string> | undefined;
}
export interface ModuleNameAndType {
moduleName: string;
importType: ImportType;
isLocalTypingsFile: boolean;
}
export interface ModuleImportInfo extends ModuleNameAndType {
isTypeshedFile: boolean;
isThirdPartyPyTypedPresent: boolean;
}
export interface ModuleNameInfoFromPath {
moduleName: string;
containsInvalidCharacters?: boolean;
}
export function createImportedModuleDescriptor(moduleName: string): ImportedModuleDescriptor {
if (moduleName.length === 0) {
return { leadingDots: 0, nameParts: [], importedSymbols: new Set<string>() };
}
let startIndex = 0;
let leadingDots = 0;
for (; startIndex < moduleName.length; startIndex++) {
if (moduleName[startIndex] !== '.') {
break;
}
leadingDots++;
}
return {
leadingDots,
nameParts: moduleName.slice(startIndex).split('.'),
importedSymbols: new Set<string>(),
};
}
type CachedImportResults = Map<string, ImportResult>;
interface SupportedVersionRange {
min: PythonVersion;
max?: PythonVersion | undefined;
}
const supportedNativeLibExtensions = ['.pyd', '.so', '.dylib'];
const supportedSourceFileExtensions = ['.py', '.pyi'];
export const supportedFileExtensions = [...supportedSourceFileExtensions, ...supportedNativeLibExtensions];
// Should we allow partial resolution for third-party packages? Some use tricks
// to populate their package namespaces, so we might be able to partially resolve
// a multi - part import(e.g. "a.b.c") but not fully resolve it. If this is set to
// false, we will have some false positives. If it is set to true, we won't report
// errors when these partial-resolutions fail.
const allowPartialResolutionForThirdPartyPackages = false;
export class ImportResolver {
private _cachedPythonSearchPaths: { paths: string[]; failureInfo: string[] } | undefined;
private _cachedImportResults = new Map<string | undefined, CachedImportResults>();
private _cachedModuleNameResults = new Map<string, Map<string, ModuleImportInfo>>();
private _cachedTypeshedRoot: string | undefined;
private _cachedTypeshedStdLibPath: string | undefined;
private _cachedTypeshedStdLibModuleVersions: Map<string, SupportedVersionRange> | undefined;
private _cachedTypeshedThirdPartyPath: string | undefined;
private _cachedTypeshedThirdPartyPackagePaths: Map<string, string[]> | undefined;
private _cachedTypeshedThirdPartyPackageRoots: string[] | undefined;
private _cachedEntriesForPath = new Map<string, Dirent[]>();
private _stdlibModules: Set<string> | undefined;
protected cachedParentImportResults: ParentDirectoryCache;
constructor(readonly serviceProvider: ServiceProvider, private _configOptions: ConfigOptions, readonly host: Host) {
this.cachedParentImportResults = new ParentDirectoryCache(() => this.getPythonSearchPaths([]));
}
get fileSystem() {
return this.serviceProvider.fs();
}
get partialStubs() {
return this.serviceProvider.tryGet(ServiceKeys.partialStubs);
}
static isSupportedImportSourceFile(path: string) {
const fileExtension = getFileExtension(path).toLowerCase();
return supportedSourceFileExtensions.some((ext) => fileExtension === ext);
}
static isSupportedImportFile(path: string) {
const fileExtension = getFileExtension(path).toLowerCase();
return supportedFileExtensions.some((ext) => fileExtension === ext);
}
invalidateCache() {
this._cachedImportResults = new Map<string | undefined, CachedImportResults>();
this._cachedModuleNameResults = new Map<string, Map<string, ModuleImportInfo>>();
this.cachedParentImportResults.reset();
this._stdlibModules = undefined;
this._invalidateFileSystemCache();
this.partialStubs?.clearPartialStubs();
}
// Resolves the import and returns the path if it exists, otherwise
// returns undefined.
resolveImport(
sourceFilePath: string,
execEnv: ExecutionEnvironment,
moduleDescriptor: ImportedModuleDescriptor
): ImportResult {
// Wrap internal call to resolveImportInternal() to prevent calling any
// child class version of resolveImport().
return this.resolveImportInternal(sourceFilePath, execEnv, moduleDescriptor);
}
getCompletionSuggestions(
sourceFilePath: string,
execEnv: ExecutionEnvironment,
moduleDescriptor: ImportedModuleDescriptor
) {
const suggestions = this._getCompletionSuggestionsStrict(sourceFilePath, execEnv, moduleDescriptor);
// We only do parent import resolution for absolute path.
if (moduleDescriptor.leadingDots > 0) {
return suggestions;
}
const root = this.getParentImportResolutionRoot(sourceFilePath, execEnv.root);
const origin = ensureTrailingDirectorySeparator(getDirectoryPath(sourceFilePath));
let current = origin;
while (this._shouldWalkUp(current, root, execEnv)) {
this._getCompletionSuggestionsAbsolute(
sourceFilePath,
execEnv,
current,
moduleDescriptor,
suggestions,
/* strictOnly */ false
);
let success;
[success, current] = this._tryWalkUp(current);
if (!success) {
break;
}
}
return suggestions;
}
getConfigOptions() {
return this._configOptions;
}
setConfigOptions(configOptions: ConfigOptions): void {
this._configOptions = configOptions;
this.invalidateCache();
}
// Returns the implementation file(s) for the given stub file.
getSourceFilesFromStub(stubFilePath: string, execEnv: ExecutionEnvironment, _mapCompiled: boolean): string[] {
const sourceFilePaths: string[] = [];
// When ImportResolver resolves an import to a stub file, a second resolve is done
// ignoring stub files, which gives us an approximation of where the implementation
// for that stub is located.
this._cachedImportResults.forEach((map) => {
map.forEach((result) => {
if (result.isStubFile && result.isImportFound && result.nonStubImportResult) {
if (result.resolvedPaths[result.resolvedPaths.length - 1] === stubFilePath) {
if (result.nonStubImportResult.isImportFound) {
const nonEmptyPath =
result.nonStubImportResult.resolvedPaths[
result.nonStubImportResult.resolvedPaths.length - 1
];
if (nonEmptyPath.endsWith('.py') || nonEmptyPath.endsWith('.pyi')) {
// We allow pyi in case there are multiple pyi for a compiled module such as
// numpy.random.mtrand
sourceFilePaths.push(nonEmptyPath);
}
}
}
}
});
});
// We haven't seen an import of that stub, attempt to find the source
// in some other ways.
if (sourceFilePaths.length === 0) {
// Simple case where the stub and source files are next to each other.
const sourceFilePath = changeAnyExtension(stubFilePath, '.py');
if (this.dirExistsCached(sourceFilePath)) {
sourceFilePaths.push(sourceFilePath);
}
}
if (sourceFilePaths.length === 0) {
// The stub and the source file may have the same name, but be located
// in different folder hierarchies.
// Example:
// <stubPath>\package\module.pyi
// <site-packages>\package\module.py
// We get the relative path(s) of the stub to its import root(s),
// in theory there can be more than one, then look for source
// files in all the import roots using the same relative path(s).
const importRootPaths = this.getImportRoots(execEnv);
const relativeStubPaths: string[] = [];
for (const importRootPath of importRootPaths) {
if (containsPath(importRootPath, stubFilePath, true)) {
const parts = getRelativePathComponentsFromDirectory(importRootPath, stubFilePath, true);
// Note that relative paths have an empty parts[0]
if (parts.length > 1) {
// Handle the case where the symbol was resolved to a stubs package
// rather than the real package. We'll strip off the "-stubs" suffix
// in this case.
if (parts[1].endsWith(stubsSuffix)) {
parts[1] = parts[1].substr(0, parts[1].length - stubsSuffix.length);
}
const relativeStubPath = combinePathComponents(parts);
if (relativeStubPath) {
relativeStubPaths.push(relativeStubPath);
}
}
}
}
for (const relativeStubPath of relativeStubPaths) {
for (const importRootPath of importRootPaths) {
const absoluteStubPath = resolvePaths(importRootPath, relativeStubPath);
let absoluteSourcePath = changeAnyExtension(absoluteStubPath, '.py');
if (this.fileExistsCached(absoluteSourcePath)) {
sourceFilePaths.push(absoluteSourcePath);
} else {
const filePathWithoutExtension = stripFileExtension(absoluteSourcePath);
if (filePathWithoutExtension.endsWith('__init__')) {
// Did not match: <root>/package/__init__.py
// Try equivalent: <root>/package.py
absoluteSourcePath =
filePathWithoutExtension.substr(0, filePathWithoutExtension.length - 9) + '.py';
if (this.fileExistsCached(absoluteSourcePath)) {
sourceFilePaths.push(absoluteSourcePath);
}
} else {
// Did not match: <root>/package.py
// Try equivalent: <root>/package/__init__.py
absoluteSourcePath = combinePaths(filePathWithoutExtension, '__init__.py');
if (this.fileExistsCached(absoluteSourcePath)) {
sourceFilePaths.push(absoluteSourcePath);
}
}
}
}
}
}
return sourceFilePaths;
}
// Returns the module name (of the form X.Y.Z) that needs to be imported
// from the current context to access the module with the specified file path.
// In a sense, it's performing the inverse of resolveImport.
getModuleNameForImport(
filePath: string,
execEnv: ExecutionEnvironment,
allowInvalidModuleName = false,
detectPyTyped = false
) {
// Cache results of the reverse of resolveImport as we cache resolveImport.
const cache = getOrAdd(this._cachedModuleNameResults, execEnv.root, () => new Map<string, ModuleImportInfo>());
const key = `${allowInvalidModuleName}.${detectPyTyped}.${filePath}`;
return getOrAdd(cache, key, () =>
this._getModuleNameForImport(filePath, execEnv, allowInvalidModuleName, detectPyTyped)
);
}
getTypeshedStdLibPath(execEnv: ExecutionEnvironment) {
const unused: string[] = [];
return this._getStdlibTypeshedPath(this._configOptions.typeshedPath, execEnv.pythonVersion, unused);
}
getTypeshedThirdPartyPath(execEnv: ExecutionEnvironment) {
const unused: string[] = [];
return this._getThirdPartyTypeshedPath(this._configOptions.typeshedPath, unused);
}
isStdlibModule(module: ImportedModuleDescriptor, execEnv: ExecutionEnvironment): boolean {
if (!this._stdlibModules) {
this._stdlibModules = this._buildStdlibCache(this.getTypeshedStdLibPath(execEnv));
}
return this._stdlibModules.has(module.nameParts.join('.'));
}
getImportRoots(execEnv: ExecutionEnvironment, forLogging = false) {
const importFailureInfo: string[] = [];
const roots = [];
const stdTypeshed = this._getStdlibTypeshedPath(
this._configOptions.typeshedPath,
execEnv.pythonVersion,
importFailureInfo
);
if (stdTypeshed) {
roots.push(stdTypeshed);
}
// The "default" workspace has a root-less execution environment; ignore it.
if (execEnv.root) {
roots.push(execEnv.root);
}
appendArray(roots, execEnv.extraPaths);
if (this._configOptions.stubPath) {
roots.push(this._configOptions.stubPath);
}
if (forLogging) {
// There's one path for each third party package, which blows up logging.
// Just get the root directly and show it with `...` to indicate that this
// is where the third party folder is in the roots.
const thirdPartyRoot = this._getThirdPartyTypeshedPath(this._configOptions.typeshedPath, importFailureInfo);
if (thirdPartyRoot) {
roots.push(combinePaths(thirdPartyRoot, '...'));
}
} else {
const thirdPartyPaths = this._getThirdPartyTypeshedPackageRoots(importFailureInfo);
appendArray(roots, thirdPartyPaths);
}
const typeshedPathEx = this.getTypeshedPathEx(execEnv, importFailureInfo);
if (typeshedPathEx) {
roots.push(typeshedPathEx);
}
const pythonSearchPaths = this.getPythonSearchPaths(importFailureInfo);
if (pythonSearchPaths.length > 0) {
appendArray(roots, pythonSearchPaths);
}
return roots;
}
ensurePartialStubPackages(execEnv: ExecutionEnvironment) {
if (!this.partialStubs) {
return false;
}
if (this.partialStubs.isPartialStubPackagesScanned(execEnv)) {
return false;
}
const ps = this.partialStubs;
const ignored: string[] = [];
const paths: string[] = [];
const typeshedPathEx = this.getTypeshedPathEx(execEnv, ignored);
// Add paths to search stub packages.
addPaths(this._configOptions.stubPath);
addPaths(execEnv.root);
execEnv.extraPaths.forEach((p) => addPaths(p));
addPaths(typeshedPathEx);
this.getPythonSearchPaths(ignored).forEach((p) => addPaths(p));
this.partialStubs.processPartialStubPackages(paths, this.getImportRoots(execEnv), typeshedPathEx);
this._invalidateFileSystemCache();
return true;
function addPaths(path?: string) {
if (!path || ps.isPathScanned(path)) {
return;
}
paths.push(path);
}
}
getPythonSearchPaths(importFailureInfo: string[]) {
// Find the site packages for the configured virtual environment.
if (!this._cachedPythonSearchPaths) {
const info: string[] = [];
const paths = (
PythonPathUtils.findPythonSearchPaths(this.fileSystem, this._configOptions, this.host, info) || []
).map((p) => this.fileSystem.realCasePath(p));
// Remove duplicates (yes, it happens).
this._cachedPythonSearchPaths = { paths: Array.from(new Set(paths)), failureInfo: info };
}
// Make sure we cache the logs as well so we can find out why search path failed.
importFailureInfo.push(...this._cachedPythonSearchPaths.failureInfo);
return this._cachedPythonSearchPaths.paths;
}
getTypeshedStdlibExcludeList(customTypeshedPath: string, pythonVersion: PythonVersion): string[] {
const unused: string[] = [];
const typeshedStdlibPath = this._getStdlibTypeshedPath(customTypeshedPath, pythonVersion, unused);
const excludes: string[] = [];
if (!typeshedStdlibPath) {
return excludes;
}
if (!this._cachedTypeshedStdLibModuleVersions) {
this._cachedTypeshedStdLibModuleVersions = this._readTypeshedStdLibVersions(customTypeshedPath, []);
}
this._cachedTypeshedStdLibModuleVersions.forEach((versionRange, moduleName) => {
if (versionRange.max !== undefined && pythonVersion > versionRange.max) {
// Add excludes for both the ".pyi" file and the directory that contains it
// (in case it's using a "__init__.pyi" file).
const moduleDirPath = combinePaths(typeshedStdlibPath, ...moduleName.split('.'));
excludes.push(moduleDirPath);
const moduleFilePath = moduleDirPath + '.pyi';
excludes.push(moduleFilePath);
}
});
return excludes;
}
protected readdirEntriesCached(path: string): Dirent[] {
const cachedValue = this._cachedEntriesForPath.get(path);
if (cachedValue) {
return cachedValue;
}
let newCacheValue: Dirent[];
try {
newCacheValue = this.fileSystem.readdirEntriesSync(path);
} catch {
newCacheValue = [];
}
// Populate cache for next time.
this._cachedEntriesForPath.set(path, newCacheValue);
return newCacheValue;
}
// Resolves the import and returns the path if it exists, otherwise
// returns undefined.
protected resolveImportInternal(
sourceFilePath: string,
execEnv: ExecutionEnvironment,
moduleDescriptor: ImportedModuleDescriptor
): ImportResult {
const importName = this.formatImportName(moduleDescriptor);
const importFailureInfo: string[] = [];
const importResult = this._resolveImportStrict(
importName,
sourceFilePath,
execEnv,
moduleDescriptor,
importFailureInfo
);
if (importResult.isImportFound || moduleDescriptor.leadingDots > 0) {
return importResult;
}
// If the import is absolute and no other method works, try resolving the
// absolute in the importing file's directory, then the parent directory,
// and so on, until the import root is reached.
sourceFilePath = realCasePath(normalizePath(sourceFilePath), this.fileSystem);
const origin = ensureTrailingDirectorySeparator(getDirectoryPath(sourceFilePath));
const result = this.cachedParentImportResults.getImportResult(origin, importName, importResult);
if (result) {
// Already ran the parent directory resolution for this import name on this location.
return this.filterImplicitImports(result, moduleDescriptor.importedSymbols);
}
// Check whether the given file is in the parent directory import resolution cache.
const root = this.getParentImportResolutionRoot(sourceFilePath, execEnv.root);
if (!this.cachedParentImportResults.checkValidPath(this.fileSystem, sourceFilePath, root)) {
return importResult;
}
const importPath: ImportPath = { importPath: undefined };
// Going up the given folder one by one until we can resolve the import.
let current = origin;
while (this._shouldWalkUp(current, root, execEnv)) {
const result = this.resolveAbsoluteImport(
sourceFilePath,
current,
execEnv,
moduleDescriptor,
importName,
[],
/* allowPartial */ undefined,
/* allowNativeLib */ undefined,
/* useStubPackage */ false,
/* allowPyi */ true
);
this.cachedParentImportResults.checked(current, importName, importPath);
if (result.isImportFound) {
// This will make cache to point to actual path that contains the module we found
importPath.importPath = current;
this.cachedParentImportResults.add({
importResult: result,
path: current,
importName,
});
return this.filterImplicitImports(result, moduleDescriptor.importedSymbols);
}
let success;
[success, current] = this._tryWalkUp(current);
if (!success) {
break;
}
}
this.cachedParentImportResults.checked(current, importName, importPath);
return importResult;
}
protected fileExistsCached(path: string): boolean {
const splitPath = this._splitPath(path);
if (!splitPath[0] || !splitPath[1]) {
if (!this.fileSystem.existsSync(path)) {
return false;
}
return tryStat(this.fileSystem, path)?.isFile() ?? false;
}
const entries = this.readdirEntriesCached(splitPath[0]);
const entry = entries.find((entry) => entry.name === splitPath[1]);
if (entry?.isFile()) {
return true;
}
if (entry?.isSymbolicLink()) {
const realPath = tryRealpath(this.fileSystem, path);
if (realPath && this.fileSystem.existsSync(realPath) && isFile(this.fileSystem, realPath)) {
return true;
}
}
return false;
}
protected dirExistsCached(path: string): boolean {
const splitPath = this._splitPath(path);
if (!splitPath[0] || !splitPath[1]) {
if (!this.fileSystem.existsSync(path)) {
return false;
}
return tryStat(this.fileSystem, path)?.isDirectory() ?? false;
}
const entries = this.readdirEntriesCached(splitPath[0]);
const entry = entries.find((entry) => entry.name === splitPath[1]);
if (entry?.isDirectory()) {
return true;
}
if (entry?.isSymbolicLink()) {
const realPath = tryRealpath(this.fileSystem, path);
if (realPath && this.fileSystem.existsSync(realPath) && isDirectory(this.fileSystem, realPath)) {
return true;
}
}
return false;
}
protected addResultsToCache(
sourceFilePath: string,
execEnv: ExecutionEnvironment,
importName: string,
importResult: ImportResult,
moduleDescriptor: ImportedModuleDescriptor | undefined,
fromUserFile: boolean
) {
// If the import is relative, include the source file path in the key.
const relativeSourceFilePath = moduleDescriptor && moduleDescriptor.leadingDots > 0 ? sourceFilePath : '';
getOrAdd(this._cachedImportResults, execEnv.root, () => new Map<string, ImportResult>()).set(
this._getImportCacheKey(relativeSourceFilePath, importName, fromUserFile),
importResult
);
return this.filterImplicitImports(importResult, moduleDescriptor?.importedSymbols);
}
// Follows import resolution algorithm defined in PEP-420:
// https://www.python.org/dev/peps/pep-0420/
protected resolveAbsoluteImport(
sourceFilePath: string | undefined,
rootPath: string,
execEnv: ExecutionEnvironment,
moduleDescriptor: ImportedModuleDescriptor,
importName: string,
importFailureInfo: string[],
allowPartial = false,
allowNativeLib = false,
useStubPackage = false,
allowPyi = true,
lookForPyTyped = false
): ImportResult {
if (allowPyi && useStubPackage) {
// Look for packaged stubs first. PEP 561 indicates that package authors can ship
// their stubs separately from their package implementation by appending the string
// '-stubs' to its top - level directory name. We'll look there first.
const importResult = this._resolveAbsoluteImport(
rootPath,
execEnv,
moduleDescriptor,
importName,
importFailureInfo,
allowPartial,
/* allowNativeLib */ false,
/* useStubPackage */ true,
/* allowPyi */ true,
/* lookForPyTyped */ true
);
// We found fully typed stub packages.
if (importResult.packageDirectory) {
// If this is a namespace package that wasn't resolved, assume that
// it's a partial stub package and continue looking for a real package.
if (!importResult.isNamespacePackage || importResult.isImportFound) {
return importResult;
}
}
}
return this._resolveAbsoluteImport(
rootPath,
execEnv,
moduleDescriptor,
importName,
importFailureInfo,
allowPartial,
allowNativeLib,
/* useStubPackage */ false,
allowPyi,
lookForPyTyped
);
}
// Intended to be overridden by subclasses to provide additional stub
// path capabilities. Return undefined if no extra stub path were found.
protected getTypeshedPathEx(execEnv: ExecutionEnvironment, importFailureInfo: string[]): string | undefined {
return undefined;
}
// Intended to be overridden by subclasses to provide additional stub
// resolving capabilities. Return undefined if no stubs were found for
// this import.
protected resolveImportEx(
sourceFilePath: string,
execEnv: ExecutionEnvironment,
moduleDescriptor: ImportedModuleDescriptor,
importName: string,
importFailureInfo: string[] = [],
allowPyi = true
): ImportResult | undefined {
return undefined;
}
// Intended to be overridden by subclasses to provide additional stub
// resolving capabilities for native (compiled) modules. Returns undefined
// if no stubs were found for this import.
protected resolveNativeImportEx(
libraryFilePath: string,
importName: string,
importFailureInfo: string[] = []
): string | undefined {
return undefined;
}
protected getNativeModuleName(fileName: string): string | undefined {
const fileExtension = getFileExtension(fileName, /* multiDotExtension */ false).toLowerCase();
if (this._isNativeModuleFileExtension(fileExtension)) {
return stripFileExtension(stripFileExtension(fileName));
}
return undefined;
}
protected getModuleNameFromPath(
containerPath: string,
filePath: string,
stripTopContainerDir = false
): string | undefined {
const moduleNameInfo = this.getModuleNameInfoFromPath(containerPath, filePath, stripTopContainerDir);
if (!moduleNameInfo || moduleNameInfo.containsInvalidCharacters) {
return undefined;
}
return moduleNameInfo.moduleName;
}
protected getModuleNameInfoFromPath(
containerPath: string,
filePath: string,
stripTopContainerDir = false
): ModuleNameInfoFromPath | undefined {
containerPath = ensureTrailingDirectorySeparator(containerPath);
let filePathWithoutExtension = stripFileExtension(filePath);
// If module is native, strip platform part, such as 'cp36-win_amd64' in 'mtrand.cp36-win_amd64'.
if (this._isNativeModuleFileExtension(getFileExtension(filePath))) {
filePathWithoutExtension = stripFileExtension(filePathWithoutExtension);
}
if (!filePathWithoutExtension.startsWith(containerPath)) {
return undefined;
}
// Strip off the '/__init__' if it's present.
if (filePathWithoutExtension.endsWith('__init__')) {
filePathWithoutExtension = filePathWithoutExtension.substr(0, filePathWithoutExtension.length - 9);
}
const relativeFilePath = filePathWithoutExtension.substr(containerPath.length);
const parts = getPathComponents(relativeFilePath);
parts.shift();
if (stripTopContainerDir) {
if (parts.length === 0) {
return undefined;
}
parts.shift();
}
if (parts.length === 0) {
return undefined;
}
// Handle the case where the symbol was resolved to a stubs package
// rather than the real package. We'll strip off the "-stubs" suffix
// in this case.
if (parts[0].endsWith(stubsSuffix)) {
parts[0] = parts[0].substr(0, parts[0].length - stubsSuffix.length);
}
// Check whether parts contains invalid characters.
const containsInvalidCharacters = parts.some((p) => !this._isIdentifier(p));
return {
moduleName: parts.join('.'),
containsInvalidCharacters,
};
}
// Potentially modifies the ImportResult by removing some or all of the
// implicit import entries. Only the imported symbols should be included.
protected filterImplicitImports(
importResult: ImportResult,
importedSymbols: Set<string> | undefined
): ImportResult {
if (importedSymbols === undefined) {
const newImportResult = Object.assign({}, importResult);
newImportResult.filteredImplicitImports = new Map<string, ImplicitImport>();
return newImportResult;
}
if (importedSymbols.size === 0) {
return importResult;
}
if (importResult.implicitImports.size === 0) {
return importResult;
}
const filteredImplicitImports = new Map<string, ImplicitImport>();
importResult.implicitImports.forEach((implicitImport) => {
if (importedSymbols.has(implicitImport.name)) {
filteredImplicitImports.set(implicitImport.name, implicitImport);
}
});
if (filteredImplicitImports.size === importResult.implicitImports.size) {
return importResult;
}
const newImportResult = Object.assign({}, importResult);
newImportResult.filteredImplicitImports = filteredImplicitImports;
return newImportResult;
}
protected formatImportName(moduleDescriptor: ImportedModuleDescriptor) {
return '.'.repeat(moduleDescriptor.leadingDots) + moduleDescriptor.nameParts.join('.');
}
protected getParentImportResolutionRoot(sourceFilePath: string, executionRoot: string | undefined) {
if (executionRoot) {
return ensureTrailingDirectorySeparator(realCasePath(normalizePath(executionRoot), this.fileSystem));
}
return ensureTrailingDirectorySeparator(getDirectoryPath(sourceFilePath));
}
private _resolveImportStrict(
importName: string,
sourceFilePath: string,
execEnv: ExecutionEnvironment,
moduleDescriptor: ImportedModuleDescriptor,
importFailureInfo: string[]
) {
const fromUserFile = matchFileSpecs(this._configOptions, sourceFilePath);
const notFoundResult: ImportResult = {
importName,
isRelative: false,
isImportFound: false,
isPartlyResolved: false,
isNamespacePackage: false,
isInitFilePresent: false,
isStubPackage: false,
importFailureInfo,
resolvedPaths: [],
importType: ImportType.Local,
isStubFile: false,
isNativeLib: false,
implicitImports: new Map<string, ImplicitImport>(),
filteredImplicitImports: new Map<string, ImplicitImport>(),
nonStubImportResult: undefined,
};
this.ensurePartialStubPackages(execEnv);
// Is it a relative import?
if (moduleDescriptor.leadingDots > 0) {
const cachedResults = this._lookUpResultsInCache(
sourceFilePath,
execEnv,
importName,
moduleDescriptor,
fromUserFile
);
if (cachedResults) {
return cachedResults;
}
const relativeImport = this._resolveRelativeImport(
sourceFilePath,
execEnv,
moduleDescriptor,
importName,
importFailureInfo
);
if (relativeImport) {
relativeImport.isRelative = true;
return this.addResultsToCache(
sourceFilePath,
execEnv,
importName,
relativeImport,
moduleDescriptor,
fromUserFile
);
}
} else {
const cachedResults = this._lookUpResultsInCache(
sourceFilePath,
execEnv,
importName,
moduleDescriptor,
fromUserFile
);
if (cachedResults) {
// In most cases, we can simply return a cached entry. However, there are cases
// where the cached entry refers to a previously-resolved namespace package
// that does not resolve the symbols specified in the module descriptor.
// In this case, we will ignore the cached value and run the full import
// resolution again to try to find a package that resolves the import.
const isUnresolvedNamespace =
cachedResults.isImportFound &&
cachedResults.isNamespacePackage &&
!this._isNamespacePackageResolved(moduleDescriptor, cachedResults.implicitImports);
if (!isUnresolvedNamespace) {
return cachedResults;
}
}
const bestImport = this._resolveBestAbsoluteImport(
sourceFilePath,
execEnv,
moduleDescriptor,
/* allowPyi */ true
);
if (bestImport) {
if (bestImport.isStubFile) {
bestImport.nonStubImportResult =
this._resolveBestAbsoluteImport(
sourceFilePath,
execEnv,
moduleDescriptor,
/* allowPyi */ false
) || notFoundResult;
}
return this.addResultsToCache(
sourceFilePath,
execEnv,
importName,
bestImport,
moduleDescriptor,
fromUserFile
);
}
}
return this.addResultsToCache(
sourceFilePath,
execEnv,
importName,
notFoundResult,
/* moduleDescriptor */ undefined,
fromUserFile
);
}
private _getCompletionSuggestionsStrict(
sourceFilePath: string,
execEnv: ExecutionEnvironment,
moduleDescriptor: ImportedModuleDescriptor
): Map<string, string> {
const importFailureInfo: string[] = [];
const suggestions = new Map<string, string>();