Remove dependency on docker CLI

[shizhMSFT]

oras CLI leverage github.com/docker/cli for reading / writing docker config file for login and logout. It is possible that using an old version of oras CLI with a new version of docker CLI at the same time may cause loss on some config fields.

[FeynmanZhou]

@shizhMSFT Does it mean ORAS CLI will need to implement its own authentication system?

[shizhMSFT]

@shizhMSFT Does it mean ORAS CLI will need to implement its own authentication system?

No, the new implementation will still be compatible with the config.json of the docker CLI.

[shizhMSFT]

Pending on https://github.com/oras-project/oras-credentials-go

[TerryHowe]

Done?

[TerryHowe]

There is an indirect dependency https://github.com/oras-project/oras/blob/main/go.mod#L19

[qweeah]

ORAS CLI still have deps on github.com/docker/docker-credential-helpers v0.7.0. Resolving this issue is depending on oras-project/oras-credentials-go#67 and merging of oras-project/oras-credentials-go#68