Generate schema from types within one file

[kirillkurko]

Bug description

In versions 3.6.1 and below (tested down to 3.1.2), it was possible to generate zod schemas from types within a single file using a command similar to the one below:

# Note that the input file matches the output file
npx ts-to-zod some-file.ts some-file.ts

After updating to version 3.7.3 (3.7.0, 3.7.1 and 3.7.2 have not been tested), the above command results in an error and no zod schemas are generated. The same problem occurs when using version 3.8.0.

Input

1. Create some file with types, e.g. some-file.ts.
2. Try generating zod schemas from types in some-file.ts and output the generated schemas to the same some-file.ts.

Expected output

Zod schemas are generated.

Actual output

No zod schemas are generated.

Versions

• Typescript: v5.2.2
• Zod: v3.22.4

[tvillaren]

Hello @kirillkurko,

Thanks for reporting.

Can you confirm that it works when generating to another file that the initial one?
Can you confirm that the error you get is about validating the files? If so, would you mind trying with the --skipValidation flag on?

[kirillkurko]

Hey @tvillaren, I can confirm that it works when generating to another file. And zod schemas are generated when running with the --skipValidation flag on, so yes, this has something to do with validating the files

[tvillaren]

Thanks for reporting, I found the issue.
I need to add test cases to cover this and prevent regression, before merging.

I commited the fix (20175f4) if you need to use it or would like to try it and confirm it does fix your issue 🙏

[kirillkurko]

Sounds great, thank you for such a quick response and finding a solution! I'll validate the fix tomorrow and let you know if it works

[kirillkurko]

Hi @tvillaren, sorry for the late reply, but I just checked the fix and it solved the problem, thanks! 🚀