Relative transform paths resolved inconsistently with compiler API

[nonara]

If the transform path is relative, it is resolved relative to the path housing the project's tsconfig.json.

It seems, however, if the compiler API is used, these paths get resolved relative to cwd. It would be more preferable to determine project root and resolve from there.

Example

/my-project/tsconfig.json

{
  "compilerOptions": {
    "plugins": [
      { "transform": "./my-transformer.ts" }
    ]
  }
}

In the above example:

• tsc resolves ./my-transformer.ts from /my-project/.
• ts.createProgram resolves ./my-transformer.ts from process.cwd()

Release Note

I'm choosing to release this update as non-major because it has a very low impact-vector and v2 is marked out for the next version. I wrestled with this for some time, however, because the behaviour is aberrant and likely affects few (if any) people's workflow, I'm marginally comfortable with the decision in this case.

Related

#53