Can't handle config file properly when it's a relative symlink

[willww64]

Description

When the config file is a relative symlink, docker cli can't handle it properly. Every config file writing operation, like docker login or docker context use, will take no effect on the real config file, but instead it creates a new file that relative to the current working directory.

Reproduce

In a fresh new docker environment:

$ mkdir ~/.docker
$ echo '{}' > ~/.docker/config-company.json
$ ln -s config-company.json ~/.docker/config.json  # this create a relative symlink
$ ls -l ~/.docker/config.json
lrwxrwxrwx 1 user group 22 Jul 23 21:37 /home/user/.docker/haha.json -> config-company.json
$ cat ~/.docker/config.json
{}
$ docker login -u <user>
Password:
Login Succeeded
$ cat ~/.docker/config.json
{}
# below is the file that docker cli actually created and wrote to, relative to the current working directory.
$ cat ./config-company.json
{
	"auths": {
		"https://index.docker.io/v1/": {
			"auth": "xxxxxxxx"
		}
	}
}

Expected behavior

docker cli should write to the absolute path of the symlink target.

docker version

Client: Docker Engine - Community
 Version:           27.0.3
 API version:       1.46
 Go version:        go1.21.11
 Git commit:        7d4bcd8
 Built:             Sat Jun 29 00:02:23 2024
 OS/Arch:           linux/amd64
 Context:           default

Server: Docker Engine - Community
 Engine:
  Version:          27.0.3
  API version:      1.46 (minimum version 1.24)
  Go version:       go1.21.11
  Git commit:       662f78c
  Built:            Sat Jun 29 00:02:23 2024
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.7.19
  GitCommit:        2bf793ef6dc9a18e00cb12efb64355c2c9d5eb41
 runc:
  Version:          1.7.19
  GitCommit:        v1.1.13-0-g58aa920
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

docker info

Client: Docker Engine - Community
 Version:    27.0.3
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.15.1
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.28.1
    Path:     /usr/libexec/docker/cli-plugins/docker-compose

Server:
 Containers: 0
  Running: 0
  Paused: 0
  Stopped: 0
 Images: 40
 Server Version: 27.0.3
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 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
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 2bf793ef6dc9a18e00cb12efb64355c2c9d5eb41
 runc version: v1.1.13-0-g58aa920
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 6.8.0-38-generic
 Operating System: Ubuntu 24.04 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 12
 Total Memory: 31.26GiB
 Name: workstation
 ID: ed0b07d9-611f-4637-a1f8-1d9403688a32
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
...
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

Additional Info

No response