docker compose config doesn't output version

[AlexNik]

Description
I have used docker-compose config command for workaround this issue moby/moby#29133 (comment)
I want to rewrite my code to use docker compose command instead but the output does not contains the version of file like when I use docker-compose command and docker stack deploy can't proccess it: unsupported Compose file version: 1.0

Steps to reproduce the issue:
example.yml

version: "3.9"

docker-compose output (version 1.29.2):

alex@alex:~/example$ docker-compose -f example.yml config
services: {}
version: '3.9'
alex@alex:~/example$ docker stack deploy -c <(docker-compose -f example.yml config) test
alex@alex:~/example$ echo $?
0

docker compose output (version 2.11.2):

alex@alex:~/example$ docker compose -f example.yml config
name: example
services: {}
alex@alex:~/example$ docker stack deploy -c <(docker compose -f example.yml config) test
unsupported Compose file version: 1.0
alex@alex:~/example$ echo $?
1

Describe the results you expected:
I expect the output like from docker-compose command version 1.29.2

Output of docker compose version:

Docker Compose version v2.11.2

Output of docker info:

Client:
 Context:    default
 Debug Mode: false
 Plugins:
  app: Docker App (Docker Inc., v0.9.1-beta3)
  buildx: Build with BuildKit (Docker Inc., v0.5.0-docker)
  compose: Docker Compose (Docker Inc., v2.11.2)
  scan: Docker Scan (Docker Inc., v0.8.0)

Server:
 Containers: 2
  Running: 0
  Paused: 0
  Stopped: 2
 Images: 176
 Server Version: 20.10.1
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Native Overlay Diff: true
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: active
  NodeID: 15remj0l09wglxwae4mguln85
  Is Manager: true
  ClusterID: ka36yctf8ep6keflzqi6ou93a
  Managers: 1
  Nodes: 1
  Default Address Pool: 10.0.0.0/8  
  SubnetSize: 24
  Data Path Port: 4789
  Orchestration:
   Task History Retention Limit: 5
  Raft:
   Snapshot Interval: 10000
   Number of Old Snapshots to Retain: 0
   Heartbeat Tick: 1
   Election Tick: 10
  Dispatcher:
   Heartbeat Period: 5 seconds
  CA Configuration:
   Expiry Duration: 3 months
   Force Rotate: 0
  Autolock Managers: false
  Root Rotation In Progress: false
  Node Address: 192.168.44.76
  Manager Addresses:
   192.168.44.76:2377
 Runtimes: io.containerd.runtime.v1.linux runc io.containerd.runc.v2
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 269548fa27e0089a8b8278fc4fc781d7f65a939b
 runc version: ff819c7e9184c13b7c2607fe6c30ae19403a7aff
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: default
 Kernel Version: 4.15.0-193-generic
 Operating System: Ubuntu 18.04 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 7.788GiB
 Name: alex
 ID: OQE4:TJOF:DDEG:SRFV:76E3:QW7B:VTYV:F647:3TRW:3GTN:AQYG:7VK2
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Username: alexnik
 Registry: https://index.docker.io/v1/
 Labels:
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

Additional environment details:

[milas]

The top-level version element has been deprecated by compose-spec and is no longer used/respected by Compose v2.

See https://docs.docker.com/compose/compose-file/#version-top-level-element for details.

[AlexNik]

@milas ok
But how to do this now without error?
docker stack deploy -c <(docker-compose config) stack-name-here
deploy command require version
Is it a bug in docker project?

[AlexNik]

@milas Dirty hack is

docker stack deploy -c  <(docker compose config | echo -e "version: '3.9'\n$(cat -)") test-stack

[glours]

@AlexNik docker stack commands don't belong to Docker anymore since Mirantis bought Docker Enterprise products in 2019.
You should ask to support the Compose Specification or to provide a custom parser of Compose file to address this issue.