Respect `NO_COLOR` for `docker image push`

[rrjjvv]

Description

A bare docker image push generates colored output, even with NO_COLOR.

This is basically a copy/paste of #6653. Though that report mentioned image/tree specifically as did the title of #6654 , the documentation update implies that all commands should respect NO_COLOR, hence filing as a bug rather than feature request.

I rarely do plain docker image push (using bake instead), so have no idea off-hand if it has always been this way or not. However, if you look at my screenshot very closely, you can see a very small part of the output actually is honoring the setting, so it's more likely there's some special code for push that doesn't flow through the fix like the rest.

---

EDIT:
Also... to be very accurate, my actual complaint/issue was that docker image push generated garbage (escape codes) in CI, where everything usually "just works" as one would expect. But knowing auto-detection isn't always perfect, I expected to be able to set an environment variable or pass a flag to control it. I'm guessing the apparent failure of auto-detection and failure of NO_COLOR have the same cause, and that the fix for one is the fix for the other. So even though this report is arguably in XY problem territory, I didn't see failed auto-detection as a bug (just an annoyance), whereas not respecting the NO_COLOR is a bug, given the current documentation.

---

Reproduce

Nothing special. I'm pushing to an internal registry, so to avoid having to blur 'private' info, I replicated with a local container. Posting a screenshot rather than code block for obvious reasons:

Note that the "Info" header does actually output in plain text; it's only the SHA output that doesn't respect the setting.

Expected behavior

No color should be present.

docker version

Client: Docker Engine - Community
 Version:           29.3.1
 API version:       1.54
 Go version:        go1.25.8
 Git commit:        c2be9cc
 Built:             Wed Mar 25 16:13:43 2026
 OS/Arch:           linux/amd64
 Context:           default

Server: Docker Engine - Community
 Engine:
  Version:          29.3.1
  API version:      1.54 (minimum version 1.40)
  Go version:       go1.25.8
  Git commit:       f78c987
  Built:            Wed Mar 25 16:13:43 2026
  OS/Arch:          linux/amd64
  Experimental:     true
 containerd:
  Version:          v2.2.2
  GitCommit:        301b2dac98f15c27117da5c8af12118a041a31d9
 runc:
  Version:          1.3.4
  GitCommit:        v1.3.4-0-gd6d73eb8
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

docker info

Client: Docker Engine - Community
 Version:    29.3.1
 Context:    default
 Debug Mode: false
 Plugins:
  ai: Docker AI Agent - Ask Gordon (Docker Inc.)
    Version:  v1.9.3
    Path:     /home/robertovillarreal/.docker/cli-plugins/docker-ai
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.31.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v5.1.1
    Path:     /usr/libexec/docker/cli-plugins/docker-compose
  mcp: Docker MCP Plugin (Docker Inc.)
    Version:  v0.34.0
    Path:     /home/robertovillarreal/.docker/cli-plugins/docker-mcp
  model: Docker Model Runner (Docker Inc.)
    Version:  v1.1.25
    Path:     /usr/libexec/docker/cli-plugins/docker-model
  scan: Docker Scan (Docker Inc.)
    Version:  v0.23.0
    Path:     /usr/libexec/docker/cli-plugins/docker-scan
  scout: Docker Scout (Docker Inc.)
    Version:  v1.19.0
    Path:     /home/robertovillarreal/.docker/cli-plugins/docker-scout

Server:
 Containers: 9
  Running: 9
  Paused: 0
  Stopped: 0
 Images: 28
 Server Version: 29.3.1
 Storage Driver: overlayfs
  driver-type: io.containerd.snapshotter.v1
 Logging Driver: json-file
 Cgroup Driver: systemd
 Cgroup Version: 2
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
 CDI spec directories:
  /etc/cdi
  /run/cdi
 Discovered Devices:
  cdi: nvidia.com/gpu=0
  cdi: nvidia.com/gpu=GPU-3a1d31e8-ef07-ef14-e974-d3223101392e
  cdi: nvidia.com/gpu=all
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 nvidia runc sysbox-runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 301b2dac98f15c27117da5c8af12118a041a31d9
 runc version: v1.3.4-0-gd6d73eb8
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 6.8.0-106-generic
 Operating System: Ubuntu 24.04.4 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 16
 Total Memory: 30.56GiB
 Name: l-9jylpn3
 ID: B6K2:2BOW:BSIE:WIGE:RODV:GC2B:JMYF:6XP4:25AT:3S4Q:6634:3OII
 Docker Root Dir: /var/lib/docker
 Debug Mode: true
  File Descriptors: 101
  Goroutines: 123
  System Time: 2026-03-25T20:44:49.401893965-06:00
  EventsListeners: 1
 Username: rrjjvv
 Experimental: true
 Insecure Registries:
<snip>
 Registry Mirrors:
<snip>
 Live Restore Enabled: false
 Default Address Pools:
   Base: 172.25.0.0/16, Size: 24
 Firewall Backend: iptables

Additional Info

My output/reproduction is for the version released just a few hours ago, but I originally replicated it (with the same behavior) in 29.3.0.