parcel-typescript-validator-broken

This repo illustrates an issue @parcel/validator-typescript 2.0.0-rc.0 where it will fail with typescript 4.4.2. There is no issue with typescript 4.3.5.

Repro steps

1. Clone the repo and run yarn to install dependencies
2. Note the key parts of the configuration. All these must be present to see the issue:

• typescript 4.4.2.
• a custom tsconfig.json present in the project.
• .parcelrc configured to run @parcel/validator-typescript.

3. Run yarn build

Result

Build fails with this output:

yarn run v1.22.11
$ parcel build src/index.html
🚨 Build failed.

@parcel/validator-typescript: directoryExists is not a function

  TypeError: directoryExists is not a function
  at Object.matchFiles (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/typescript/lib/typescript.js:20102:17)
  at ParseConfigHost.readDirectory (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/@parcel/ts-utils/lib/FSHost.js:105:20)
  at getFileNamesFromConfigSpecs (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/typescript/lib/typescript.js:40747:40)
  at getFileNames (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/typescript/lib/typescript.js:40250:29)
  at parseJsonConfigFileContentWorker
  (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/typescript/lib/typescript.js:40183:24)
  at Object.parseJsonConfigFileContent
  (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/typescript/lib/typescript.js:40124:16)
  at tryCreateLanguageService
  (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/@parcel/validator-typescript/lib/TypeScriptValidator.js:138:53)
  at /Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/@parcel/validator-typescript/lib/TypeScriptValidator.js:87:7
  at async Promise.all (index 0)
  at async Object.validateAll
  (/Users/Andrew/Projects/parcel-typescript-validator-broken/node_modules/@parcel/validator-typescript/lib/TypeScriptValidator.js:81:5)
error Command failed with exit code 1.