When pulling or pushing images, the CLI could prompt for a password
if the push/pull failed and the registry returned a 401 (Unauthorized)
Ironically, this feature did not work when using Docker Hub (and possibly
other registries using basic auth), due to some custom error handling added
in [moby@19a93a6e3d42], which also discards the registry's status code,
changing it to a 404;
curl -v -XPOST --unix-socket /var/run/docker.sock 'http://localhost/v1.50/images/create?fromImage=docker.io%2Fexample%2Fprivate&tag=latest'
...
< HTTP/1.1 404 Not Found
< Content-Type: application/json
...
{"message":"pull access denied for example/private, repository does not exist or may require 'docker login'"}
And due to a bug, other registries (not using basic auth) returned a generic
error, which resulted in a 500 Internal Server Error. That bug was fixed in
docker 28.2, now returning the upstream status code and trigger an interactive
prompt;
docker pull icr.io/my-ns/my-image:latest
Please login prior to pull:
Username:
This prompt would be triggered unconditionally, also if the CLI was run
non-interactively and no TTY attached;
docker pull icr.io/my-ns/my-image:latest < /dev/null
Please login prior to pull:
Username:
With this PR, no prompt is shown ;
# without STDIN attached
docker pull icr.io/my-ns/my-image:latest < /dev/null
Error response from daemon: error from registry: Authorization required. See https://cloud.ibm.com/docs/Registry?topic=Registry-troubleshoot-auth-req - Authorization required. See https://cloud.ibm.com/docs/Registry?topic=Registry-troubleshoot-auth-req
For now, the prompt is still shown otherwise;
docker pull icr.io/my-ns/my-image:latest
Login prior to pull:
Username: ^C
[moby@19a93a6e3d42]: 19a93a6e3d
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
c88268681e