typescript fails when compilerOptions are specified without using tsconfig.json

[Samantha-uk]

• Rollup Plugin Name: typescript
• Rollup Plugin Version: 8.1.0
• Rollup Version: 2.35.1
• Operating System (or Browser): Debian Buster
• Node Version: 14.15.1
• Link to reproduction: https://repl.it/@Samanthauk/rollup-plugin-repro

Expected Behavior

Compilation to proceed as specified in the compilerOptions passed in to plugin-typescript.

Actual Behavior

[!] (plugin typescript) Error: Could not load /home/runner/rollup-plugin-repro/input.ts: Debug Failure.

Additional Information

The error appears to be caused by an assertion failing inside ts.getOutputFileNames expecting there to be a tsconfig.json path.

I'll submit a PR with a test for this usecase (skipped as the test currently fails).

[Samantha-uk]

I updated my reproduction to use (I believe) the latest rollup/typescript plugin versions
I still get the same indecipherable error message; rather than the nice one that the PR is aimed at providing. :(

input.ts → output/bundle.js...
[!] (plugin typescript) Error: Could not load /home/runner/rollup-plugin-repro/input.ts: Debug Failure.
Error: Could not load /home/runner/rollup-plugin-repro/input.ts: Debug Failure.
    at rootDirOfOptions (/home/runner/rollup-plugin-repro/node_modules/typescript/lib/typescript.js:99520:75)
    at getOutputPathWithoutChangingExt (/home/runner/rollup-plugin-repro/node_modules/typescript/lib/typescript.js:99524:71)
    at getOutputDeclarationFileName (/home/runner/rollup-plugin-repro/node_modules/typescript/lib/typescript.js:99530:35)
    at getOwnOutputFileNames (/home/runner/rollup-plugin-repro/node_modules/typescript/lib/typescript.js:99577:23)
    at Object.getOutputFileNames (/home/runner/rollup-plugin-repro/node_modules/typescript/lib/typescript.js:99608:13)
    at findTypescriptOutput (/home/runner/rollup-plugin-repro/node_modules/@rollup/plugin-typescript/dist/index.js:435:33)
    at Object.load (/home/runner/rollup-plugin-repro/node_modules/@rollup/plugin-typescript/dist/index.js:741:28)

exit status 1

[shellscape]

I used your original reproduction and failing test to validate the work that closed this issue. Note that it hasn't been published. Between the open issue waiting on TS 4.2.0 and the update yesterday, your issue is addressed.

[Samantha-uk]

Thank you.
As it happens I modified the TS plugin and have been running it for several weeks without issue ... perhaps I'll PR it ...