Xo: [has workaround] XO not working with TypeScript: Cannot find module 'json-schema'

[papb]

Apparently xo is simply not working with typescript. Steps to reproduce:

• New empty folder
• npm init -y
• npm install --save-dev typescript xo
• Create a new file index.ts:
  js console.log('test');

• npx xo

  Error: Failed to load parser 'C:\Users\Pedro\Desktop\xo-not-working\node_modules\@typescript-eslint\parser\dist\parser.js' declared in 'BaseConfig': Cannot find module 'json-schema'
  Require stack:
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\@typescript-eslint\experimental-utils\dist\json-schema.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\@typescript-eslint\experimental-utils\dist\index.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\@typescript-eslint\parser\dist\analyze-scope.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\@typescript-eslint\parser\dist\parser.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\eslint\lib\cli-engine\config-array-factory.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\eslint\lib\cli-engine\cascading-config-array-factory.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\eslint\lib\cli-engine\cli-engine.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\eslint\lib\cli-engine\index.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\eslint\lib\api.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\xo\index.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\xo\cli-main.js
  - C:\Users\Pedro\Desktop\xo-not-working\node_modules\xo\cli.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:793:17)
    at Function.Module._load (internal/modules/cjs/loader.js:686:27)
    at Module.require (internal/modules/cjs/loader.js:848:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (C:\Users\Pedro\Desktop\xo-not-working\node_modules\@typescript-eslint\experimental-utils\dist\json-schema.js:7:10)
    at Module._compile (internal/modules/cjs/loader.js:955:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:991:10)
    at Module.load (internal/modules/cjs/loader.js:811:32)
    at Function.Module._load (internal/modules/cjs/loader.js:723:14)
    at Module.require (internal/modules/cjs/loader.js:848:19)
  

• Running npm install --save-dev json-schema solves the issue.

• The issue goes away if the file is renamed from index.ts to index.js (but defeats the point, of course)

• The issue is exactly the same without installing typescript

Some versions if it helps:

`-- [email protected]
  +-- @typescript-eslint/[email protected]
  | `-- @typescript-eslint/[email protected]
  `-- @typescript-eslint/[email protected]
    `-- @typescript-eslint/[email protected]  deduped

[sindresorhus]

See https://github.com/typescript-eslint/typescript-eslint/issues/2009

[sindresorhus]

This has been fixed upstream. Just reinstall XO and it should be fixed.