[BUG] `docker compose alpha watch` does not respond to kill commands

[nicks]

Description

docker compose alpha watch does not respond to kill commands

Steps To Reproduce

1. Run docker compose alpha watch
2. In another terminal, run:

$ ps aux | grep "docker compose alpha watch"
nick      159635  0.1  0.2 769108 36212 pts/1    Sl+  14:53   0:00 docker compose alpha watch
nick      160033  0.0  0.0   9220  2360 pts/3    S+   14:54   0:00 grep --color=auto docker compose alpha watch

3. Kill the command

$ kill 159635

Expected behavior:

the command should exit

Actual behavior:

the command ignores signals

Compose Version

Docker Compose version v2.19.0-cloud

Docker Environment

Client: Docker Engine - Community
 Version:    24.0.2
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.11.0-cloud-driver+002
    Path:     /home/nick/.docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.19.0-cloud
    Path:     /home/nick/.docker/cli-plugins/docker-compose
  dev: Docker Dev Environments (Docker Inc.)
    Version:  v0.1.0
    Path:     /usr/lib/docker/cli-plugins/docker-dev
  extension: Manages Docker extensions (Docker Inc.)
    Version:  v0.2.20
    Path:     /usr/lib/docker/cli-plugins/docker-extension
  init: Creates Docker-related starter files for your project (Docker Inc.)
    Version:  v0.1.0-beta.6
    Path:     /usr/lib/docker/cli-plugins/docker-init
  sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
    Version:  0.6.0
    Path:     /usr/lib/docker/cli-plugins/docker-sbom
  scan: Docker Scan (Docker Inc.)
    Version:  v0.26.0
    Path:     /usr/lib/docker/cli-plugins/docker-scan
  scout: Command line tool for Docker Scout (Docker Inc.)
    Version:  0.16.1
    Path:     /usr/lib/docker/cli-plugins/docker-scout
WARNING: Plugin "/usr/lib/docker/cli-plugins/docker-compose.14.backup" is not valid: plugin candidate "compose.14.backup" did not match "^[a-z][a-z0-9]*$"

Server:
 Containers: 26
  Running: 7
  Paused: 0
  Stopped: 19
 Images: 57
 Server Version: 24.0.2
 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 logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 3dce8eb055cbb6872793272b4f20ed16117344f8
 runc version: v1.1.7-0-g860f061
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
  cgroupns
 Kernel Version: 5.15.0-75-generic
 Operating System: Linux Mint 21.1
 OSType: linux
 Architecture: x86_64
 CPUs: 8
 Total Memory: 15.25GiB
 Name: grumpy
 ID: 9cba2c25-6ba4-4f6c-995c-53aacc5cc77e
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  127.0.0.0/8
 Live Restore Enabled: false

Anything else?

I think this might be some sort of bad interop between how the watch command listens on input and the cli plugin system works

[ndeloof]

if you use kill to send signal to the process docker then only this one will receive signal, not the whole process groups - which typically includes docker CLI plugins like compose or buildx. You have to kill the whole process group passing a -:
kill -9 -159635

closing as "work as expected"