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fix(typescript-estree): only create project service from env setting if project is enabled #8136

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Jan 7, 2024
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fix(typescript-estree): only create project service from env setting if project is enabled #8136

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fix(typescript-estree): only create project serve from env setting if…
JoshuaKGoldberg Dec 26, 2023
26a736c
fix lint
JoshuaKGoldberg Jan 7, 2024
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8 changes: 4 additions & 4 deletions packages/typescript-estree/src/parseSettings/createParseSettings.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -80,10 +80,10 @@ export function createParseSettings(
errorOnTypeScriptSyntacticAndSemanticIssues: false,
errorOnUnknownASTType: options.errorOnUnknownASTType === true,
EXPERIMENTAL_projectService:
(options.EXPERIMENTAL_useProjectService &&
process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER !== 'false') ||
(process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER === 'true' &&
options.EXPERIMENTAL_useProjectService !== false)
options.EXPERIMENTAL_useProjectService ||
(options.project &&
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Hello @JoshuaKGoldberg , should we check it's non-empty?

I don't know this project options, asking this only because I use project:[] in prettier and eslint-plugin-unicorn, I don't remember why, maybe prevent search for tsconfig.json?

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Looking at the docs, maybe I should use project: false?

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Hmm, yes, or project: null.

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@fisker fisker Jan 7, 2024 •
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Back to my question, should we treat [] as false here?

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Good question 🤔. My gut instinct is that it should probably be an error. I'm not sure though... Filed #8210.

options.EXPERIMENTAL_useProjectService !== false &&
process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER === 'true')
? (TSSERVER_PROJECT_SERVICE ??= createProjectService(
options.EXPERIMENTAL_useProjectService,
jsDocParsingMode,
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50 changes: 50 additions & 0 deletions packages/typescript-estree/tests/lib/createParseSettings.test.ts
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@@ -1,6 +1,56 @@
import { createParseSettings } from '../../src/parseSettings/createParseSettings';

const projectService = { service: true };

jest.mock('../../src/create-program/createProjectService', () => ({
createProjectService: (): typeof projectService => projectService,
}));

describe('createParseSettings', () => {
describe('EXPERIMENTAL_projectService', () => {
it('is created when options.EXPERIMENTAL_useProjectService is enabled', () => {
process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER = 'false';

const parseSettings = createParseSettings('', {
EXPERIMENTAL_useProjectService: true,
});

expect(parseSettings.EXPERIMENTAL_projectService).toBe(projectService);
});

it('is created when options.EXPERIMENTAL_useProjectService is undefined, options.project is true, and process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER is true', () => {
process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER = 'true';

const parseSettings = createParseSettings('', {
EXPERIMENTAL_useProjectService: undefined,
project: true,
});

expect(parseSettings.EXPERIMENTAL_projectService).toBe(projectService);
});

it('is not created when options.EXPERIMENTAL_useProjectService is undefined, options.project is falsy, and process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER is true', () => {
process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER = 'true';

const parseSettings = createParseSettings('', {
EXPERIMENTAL_useProjectService: undefined,
});

expect(parseSettings.EXPERIMENTAL_projectService).toBeUndefined();
});

it('is not created when options.EXPERIMENTAL_useProjectService is false, options.project is true, and process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER is true', () => {
process.env.TYPESCRIPT_ESLINT_EXPERIMENTAL_TSSERVER = 'true';

const parseSettings = createParseSettings('', {
EXPERIMENTAL_useProjectService: false,
project: true,
});

expect(parseSettings.EXPERIMENTAL_projectService).toBeUndefined();
});
});

describe('tsconfigMatchCache', () => {
it('reuses the TSConfig match cache when called a subsequent time', () => {
const parseSettings1 = createParseSettings('input.ts');
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