docker push should support --quiet flag

[nathanleclaire]

I'm on latest Docker for Mac. It would be quite nice if docker push had a quiet mode, similar to how curl has -q to avoid showing the download-in-progress animations. I like the push output for working directly with docker but not for shell scripts.

[thaJeztah]

A --quiet option for docker pull is being worked on in docker/cli#882 (not yet for push, but I agree we should probably have it for both.

Meanwhile, to suppress the progress bars, the same trick as for docker pull could be used as a workaround (see #13588 (comment))

docker push <image> | cat

@nathanleclaire could you perhaps reopen this in the docker/cli issue tracker (https://github.com/docker/cli/issues), because that's where the change will have to be made

[nathanleclaire]

Sure!

[ghost]

Wouldn't that swallow errors?

[thaJeztah]

For easier discovery; this was implemented in docker/cli#2197, and will be in the next release of docker (no ETA yet, but the release after 19.03)

@BarakBD-Globality Hm.. yes, it should still print errors, but looks like there's a bug/oversight there:

Without --quiet

$ docker push nosuchimage
The push refers to repository [docker.io/library/nosuchimage]
An image does not exist locally with the tag: nosuchimage

echo $?
1

$ docker push busybox
The push refers to repository [docker.io/library/busybox]
195be5f8be1d: Layer already exists
[DEPRECATION NOTICE] registry v2 schema1 support will be removed in an upcoming release. Please contact admins of the docker.io registry NOW to avoid future disruption. More information at https://docs.docker.com/registry/spec/deprecated-schema-v1/
errors:
denied: requested access to the resource is denied
unauthorized: authentication required

echo $?
1

With --quiet:

$ docker push --quiet nosuchimage
docker.io/library/nosuchimage

$ echo $?
0

$ docker push --quiet busybox
docker.io/library/busybox

$ echo $?
0

I'll open a bug-report in docker/cli and post the link here

[thaJeztah]

Opened docker/cli#2284