* Support 'isSourceFileFromExternalLibrary' for source files from '/// <reference types="" />''
* Calculate `isExternalLibraryImport` at the end
* Calculate isExternalLibraryImport with symlink path
Before this change, when failed lookup location didnt fall in root directory,
we tried to find the ancestor directory of the rootDirectory to watch.
We also created subDirectory map for the directories that are being watched so we dont go through invalidation if path is unwanted directory
With this change, we will watch those subdirectories instead of root. On windows node supports file system level recursive watching so the earlier approach was better because we reduced number of watches created
But on other os, since node doesnt support it, we create the watches for existing folders outselves, so earlier approach becomes expensive.
This should be better compromize to satisfy both types of OS.
Fixes#24434
* Enable '--strictNullChecks'
* Fix API baselines
* Make sys.getEnvironmentVariable non-nullable
* make properties optional instead of using `| undefined` in thier type
* reportDiagnostics should be required
* Declare firstAccessor as non-nullable
* Make `some` a type guard
* Fix `getEnvironmentVariable` definition in tests
* Pretend transformFlags are always defined
* Fix one more use of sys.getEnvironmentVariable
* `requiredResponse` accepts undefined, remove assertions
* Mark optional properties as optional instead of using `| undefined`
* Mark optional properties as optional instead of using ` | undefined`
* Remove unnecessary null assertions
* Put the bang on the declaration instead of every use
* Make `createMapFromTemplate` require a parameter
* Mark `EmitResult.emittedFiles` and `EmitResult.sourceMaps` as optional
* Plumb through undefined in emitLsit and EmitExpressionList
* `ElementAccessExpression.argumentExpression` can not be `undefined`
* Add overloads for `writeTokenText`
* Make `shouldWriteSeparatingLineTerminator` argument non-nullable
* Make `synthesizedNodeStartsOnNewLine` argument required
* `PropertyAssignment.initializer` cannot be undefined
* Use one `!` at declaration site instead of on every use site
* Capture host in a constant and avoid null assertions
* Remove few more unused assertions
* Update baselines
* Use parameter defaults
* Update baselines
* Fix lint
* Make Symbol#valueDeclaration and Symbol#declarations non-optional to reduce assertions
* Make Node#symbol and Type#symbol non-optional to reduce assertions
* Make `flags` non-nullable to reduce assertions
* Convert some asserts to type guards
* Make `isNonLocalAlias` a type guard
* Add overload for `getSymbolOfNode` for `Declaration`
* Some more `getSymbolOfNode` changes
* Push undefined suppression into `typeToTypeNodeHelper`
* `NodeBuilderContext.tracker` is never `undefined`
* use `Debug.assertDefined`
* Remove unnecessary tag
* Mark `LiteralType.freshType` and `LiteralTupe.regularType` as required
* getEditsForFileRename: Do fresh module resolution instead of relying on cache
* Add host.resolveModuleNameWithFailedLookupLocations method
* Make host.resolveModuleNameWithFailedLookupLocations mandatory, and implement for Project
* Add test, and no need to check host.fileExists
* Change method name and always use cache
* Update name in string
This has 3 changes:
1. In updateGraph when enqueue the typing installation request (depending on unresolved imports)
2. When ActionSet event is received, invalidate only files with unresolved imports and resolve those.
3. When ActionInvalidate event is received, typing installer has detected some change in global typing cache location, so just enqueue a new typing installation request. This will repeat the cycle of setting correct typings and pickiing unresolved imports
There are times when the directory watcher for failed lookup locations isnt invoked and is not very determinitstic
So as a fallback, when we receive typeRoots watch event, handle failed lookup locations as well
