${configDir} in paths without baseUrl doesn't work

[sloonz]

Acknowledgements

• I read the documentation and searched existing issues to avoid duplicates
• I understand this is a bug tracker and anything other than a proven bug will be closed
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Minimal reproduction URL

https://github.com/sloonz/tsx-repro

Problem & expected behavior (under 200 words)

Above repro gives :

Error: Non-relative paths are not allowed when 'baseUrl' is not set. Did you forget a leading './'?
    at /tmp/t2/node_modules/get-tsconfig/dist/index.cjs:7:12530
    at Array.map (<anonymous>)
    at /tmp/t2/node_modules/get-tsconfig/dist/index.cjs:7:12416
    at Array.map (<anonymous>)
    at parsePaths (/tmp/t2/node_modules/get-tsconfig/dist/index.cjs:7:12312)
    at Object.createPathsMatcher (/tmp/t2/node_modules/get-tsconfig/dist/index.cjs:7:12853)
    at loadTsconfig (/tmp/t2/node_modules/tsx/dist/register-D46fvsV_.cjs:1:1461)
    at Object.register (/tmp/t2/node_modules/tsx/dist/register-D46fvsV_.cjs:4:1579)
    at Object.<anonymous> (/tmp/t2/node_modules/tsx/dist/cjs/index.cjs:1:473)
    at Module._compile (node:internal/modules/cjs/loader:1734:14)

Obviously tsc has no trouble with it.

Weird thing is that get-tsconfig has no trouble with that repro :

$ node
> console.dir(require("get-tsconfig").parseTsconfig("tsconfig.json"), {depth: null})
{
  include: [ '/tmp/t2/file.ts' ],
  compilerOptions: {
    outDir: './dist',
    paths: { '@/*': [ '/tmp/t2/*' ] },
    Symbol(implicitBaseUrl): '/tmp/t2'
  },
  exclude: [ '/tmp/t2/dist' ]
}

(which is unsurprising, since I made that repro from get-tsconfig unit tests)

Bugs are expected to be fixed by those affected by it

• I'm interested in working on this issue

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[sloonz]

My intuition says that in https://github.com/privatenumber/get-tsconfig/blob/8564f8821efa26cc53d2d60b2f63c013969dbe49/src/paths-matcher/index.ts#L66, baseUrl should be baseUrl || implicitBaseUrl too ?

Modifying by hand node_modules/get-tsconfig/dist/index.mjs that way seems to fix the issue — not 100% sure it's the correct thing to do tho ?