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fix(language-service): reinstate getExternalFiles() (#37750)

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`getExternalFiles()` is an API that could optionally be provided by a tsserver plugin
to notify the server of any additional files that should belong to a particular project.

This API was removed in https://github.com/angular/angular/pull/34260 mainly
due to performance reasons.

However, with the introduction of "solution-style" tsconfig in typescript 3.9,
the Angular extension could no longer reliably detect the owning Project solely
based on the ancestor tsconfig.json. In order to support this use case, we have
to reinstate `getExternalFiles()`.

Fixes https://github.com/angular/vscode-ng-language-service/issues/824

PR Close #37750
This commit is contained in:
Keen Yee Liau
2020-06-25 14:17:17 -07:00
committed by Andrew Kushnir
parent 5e287f67af
commit ad6680f602
3 changed files with 39 additions and 2 deletions
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9
packages/language-service/test/ts_plugin_spec.ts
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@ -8,7 +8,7 @@
import * as ts from 'typescript';
import {create} from '../src/ts_plugin';
import {create, getExternalFiles} from '../src/ts_plugin';
import {CompletionKind} from '../src/types';
import {MockTypescriptHost} from './test_utils';
@ -129,6 +129,13 @@ describe('plugin', () => {
},
]);
});
it('should return external templates when getExternalFiles() is called', () => {
const externalTemplates = getExternalFiles(mockProject);
expect(externalTemplates).toEqual([
'/app/test.ng',
]);
});
});
describe(`with config 'angularOnly = true`, () => {