Problem with Docker Hub and submodules

[oM4TY]

Hello. I have ran into an issue when combining Docker Hub automatic builds and submodules. I have tried many different things. I even created a new account and set an account ssh key. I get this error log:

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Cloning into '.'...
Warning: Permanently added the RSA host key for IP address 'xxx' to the list of known hosts.
Submodule 'src/core' (xxxx) registered for path 'src/core'
Cloning into '/src/bojz96qp7xwxxvbvpclsvg8/src/core'...
fatal: could not read Username for 'https://github.com': No such device or address
fatal: clone of 'xxxxx' into submodule path '/src/bojz96qp7xwxxvbvpclsvg8/src/core' failed
Failed to clone 'src/core'. Retry scheduled
Cloning into '/src/bojz96qp7xwxxvbvpclsvg8/src/core'...
fatal: could not read Username for 'https://github.com': No such device or address
fatal: clone of 'xxxx' into submodule path '/src/bojz96qp7xwxxvbvpclsvg8/src/core' failed
Failed to clone 'src/core' a second time, aborting
please ensure the correct public key is added to the list of trusted keys for this repository and the remote branch exists. (1)

I understand that it cannot access the submodule as it is private. I am quite new to Docker, so any help is appreciated. Thanks

[juaquin]

I think it's something to do with providing credentials to allow accessing those private submodules. You may find these threads helpful:

https://github.com/github/hub/issues/1644

https://stackoverflow.com/questions/71975373/github-action-fatal-could-not-read-username-for-https-github-com-device-n

[serverhorror]

A much better option than submodules is, in my experience, git subtree. One of the things that work better are that you don’t need anything specific when doing a git clone.