Hello

How can we exclude files from compilation (for example test files ending with .spec.ts)? I tried #415 but it errored:

ESM Build failed
Error: Build failed with 1 error:
error: The entry point "./src/api.spec.ts" cannot be marked as external

Then I switched from using npx tsup src to npx tsup src/index.ts and I got an error that other files are imported but are not entrypoints.

src/index.ts(1,15): error TS6307: File '<redacted>/src/endpoints.ts' is not listed within the file list of project ''. Projects must list all files or use an 'include' pattern.
  The file is in the program because:
    Imported via './endpoints' from file '<redacted>/src/index.ts'
    Imported via './endpoints' from file '<redacted>/api.ts'
src/index.ts(3,15): error TS6307: File '<redacted>/src/api.ts' is not listed within the file list of project ''. Projects must list all files or use an 'include' pattern.

Then I tried to "include" everything under "./src" in tsconfig.json, but it didn't help.

Then I tried to use the glob library to exactly specify my import files and exclude test files, but I don't think tsup supports asynchronous configs?

Is there a way to exclude files within the src directory (preferably without creating a node script that calls tsup's "build" directly)?