feat: TypeScript resolver

[JounQin]

Reproduction detail #19

[privatenumber]

This is currently expected behavior because it's a "paths matcher", not a TypeScript resolver.

In tsx (+ cjs-loader, esm-loader), we resolve using this util.

Are you trying to use this in another project?
Perhaps we can turn this into a feature request to add a TypeScript resolver.

[JounQin]

I'm using it at https://github.com/alexgorbatchev/eslint-import-resolver-typescript/blob/master/src/index.ts#L243

[JounQin]

See https://github.com/alexgorbatchev/eslint-import-resolver-typescript/blob/master/tests/withJsExtension/test.js#L27-L131 for more test cases.

[privatenumber]

I investigated this, and it might be a little more complicated than it appears.

I'd like to keep get-tsconfig file-system agnostic, but it seems to definitely require a file-system to check whether a path is a directory, has a package.json and read from the main property.

Here's a tsc resolver log:

======== Resolving module './a' from '/get-tsconfig/test/index.ts'. ========
Module resolution kind is not specified, using 'NodeJs'.
Loading module as file / folder, candidate module location '/get-tsconfig/test/a', target file type 'TypeScript'.
File '/get-tsconfig/test/a.ts' does not exist.
File '/get-tsconfig/test/a.tsx' does not exist.
File '/get-tsconfig/test/a.d.ts' does not exist.
File '/get-tsconfig/test/a/package.json' does not exist.
File '/get-tsconfig/test/a/index.ts' does not exist.
File '/get-tsconfig/test/a/index.tsx' does not exist.
File '/get-tsconfig/test/a/index.d.ts' does not exist.
Loading module as file / folder, candidate module location '/get-tsconfig/test/a', target file type 'JavaScript'.
File '/get-tsconfig/test/a.js' does not exist.
File '/get-tsconfig/test/a.jsx' does not exist.
File '/get-tsconfig/test/a/package.json' does not exist according to earlier cached lookups.
File '/get-tsconfig/test/a/index.js' does not exist.
File '/get-tsconfig/test/a/index.jsx' does not exist.
======== Module name './a' was not resolved. ========

That said, it won't be as simple as adding paths with .ts, .tsx, etc appended.

[JounQin]

See https://github.com/alexgorbatchev/eslint-import-resolver-typescript/blob/master/tests/withJsExtension/test.js#L27-L131 for more test cases.

Yeah, there are a lot of test cases. 😅

[privatenumber]

For reference, here's another edge-case to cover:
privatenumber/tsx#59