Multer is missing for config.d.ts

config.d.ts references multer but it’s not included/referenced in tsoa runtime, causing an error message.

p_1      | $ rm -rf /build && tsoa spec-and-routes && tsc
p_1      | node_modules/@tsoa/runtime/dist/config.d.ts(2,39): error TS2307: Cannot find module 'multer' or its corresponding type declarations.

Nevertheless, I can still access my OpenAPI spec and SwaggerUI. I am not using any form/multi endpoints from the spec, that might be why it still works. Also I cannot say how a real API would be affected, currently this is just a few mock controllers to produce a spec.

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Expected Behavior

No error when running tsoa in docker container / building docker image. Peer dependency is shipped / declared correctly (?)

Current Behavior

When running tsoa spec-and-routes I see this message:

p_1      | $ rm -rf /build && tsoa spec-and-routes && tsc
p_1      | node_modules/@tsoa/runtime/dist/config.d.ts(2,39): error TS2307: Cannot find module 'multer' or its corresponding type declarations.

Nevertheless, I can still access my OpenAPI spec and SwaggerUI. I am not using any form/multi endpoints from the spec, that might be why it still works. Also I cannot say how a real API would be affected, currently this is just a few mock controllers to produce a spec.

Note: I only see the message when calling tsoa during a Docker image build, but when going into node_modules/@tsoa/.../config.d.ts VS code is also claiming that multer is missing.

Adding multer as dev dependency gets rid of the warning in the logs and in VS code, but it feels strange that I have to add the dependency explicitly to my project.

Possible Solution

Steps to Reproduce

If needed, I can provide more details and a small repro later on.

Context (Environment)

Version of the library: 3.14.1 and 4.0.0-rc1 Version of NodeJS: 16 (LTS, Alpine Image as base for Docker image)

• Confirm you were using yarn not npm: [x]

[akerpelm]

this appears to also be present in 4.0.0 - with the temporary fix being the addition of multer as a dependency (though as mentioned, somewhat unexpected behavior).

[frederikhm]

I also encountered this bug with tsoa 4.1.0. I was not using docker, but still unable to tun yarn run tsc --outDir build --experimentalDecorators due to the error. manually installing multer and @types/multer as dev dependencies fixed the problem.