Compiler options are expected in internal format

[slavafomin]

Current behavior

When passing compiler options in the external format (like in tsconfig.json and like it stated in the plugin's documentation) it fails to parse "enumerated" fields like moduleResolution with the error like this: Unexpected moduleResolution: Node.

Expected behavior

It should parse such fields correctly.

Steps to reproduce the issue

Pass this config:

{ moduleResolution: 'Node' }

Environment

• fork-ts-checker-webpack-plugin: ^4.0.4
• typescript: ^3.7.2
• webpack: ^4.41.0
• os: Ubuntu 18.04.4 LTS, Linux 5.3.0-40-generic

Workaround

Use convertCompilerOptions() from @moebius/ts-compiler-options to convert options from external format to internal first:

new ForkTsCheckerWebpackPlugin({
  compilerOptions: convertCompilerOptions(
    'external-to-internal',
    { moduleResolution: 'Node' }
  ),
})

[piotr-oles]

There is a function provided by the TypeScript itself: ts.convertCompilerOptionsFromJson :) It will be used in the 5.0.0 release :)

[piotr-oles]

@slavafomin
Please try fork-ts-checker-webpack-plugin@alpha - I've published a new version which should resolve this issue 🚀
I will close this issue to clean-up the backlog. If this release didn't solve the issue, we can re-open this :)