Condense output of docker compose top

[dmke]

Description

In a current compose project, docker compose top reports the following:

$ docker compose top
myproject-converters-1
UID    PID      PPID     C    STIME   TTY   TIME       CMD
root   336052   335954   0    11:18   ?     00:00:01   ruby bin/server

myproject-redis-ephemeral-1
UID        PID      PPID     C    STIME   TTY   TIME       CMD
systemd+   336001   335887   0    11:18   ?     00:00:05   valkey-server *:6379

myproject-redis-persisted-1
UID    PID      PPID     C    STIME   TTY   TIME       CMD
root   336038   335921   0    11:18   ?     00:00:08   valkey-server *:6379

myproject-sidekiq-default-1
UID      PID      PPID     C    STIME   TTY   TIME       CMD
appuser   338516   338496   19   12:00   ?     00:00:09   sidekiq 7.3.6 default [0 of 3 busy]

myproject-watchtower-1
UID    PID      PPID     C    STIME   TTY   TIME       CMD
root   335931   335850   0    11:18   ?     00:00:00   /watchtower --label-enable --include-stopped --revive-stopped --cleanup --rolling-restart --stop-timeout=80s --http-api-update

myproject-web-1
UID      PID      PPID     C    STIME   TTY   TIME       CMD
appuser   338619   338597   0    12:00   ?     00:00:00   /bin/bash -e /rails/bin/docker-entrypoint.sh rails server
appuser   338653   338619   0    12:00   ?     00:00:00   flock -x /rails/data/migration-check.lock bundle exec rake db:prepare
appuser   338665   338653   46   12:00   ?     00:00:01   /usr/local/bundle/ruby/3.2.0/bin/rake db:prepare

I find this a bit wasteful, in regards to the screen estate. The output is also hard to grasp because the columns are not aligned across the various services.

Would you accept a PR to format the output to something like the following?

$ docker compose top
SERVICE                       UID        PID      PPID     C    STIME   TTY   TIME       CMD
myproject-converters-1        root       336052   335954   0    11:18   ?     00:00:01   ruby bin/server
myproject-redis-ephemeral-1   systemd+   336001   335887   0    11:18   ?     00:00:05   valkey-server *:6379
myproject-redis-persisted-1   root       336038   335921   0    11:18   ?     00:00:08   valkey-server *:6379
myproject-sidekiq-default-1   appuser    338516   338496   19   12:00   ?     00:00:09   sidekiq 7.3.6 default [0 of 3 busy]
myproject-watchtower-1        root       335931   335850   0    11:18   ?     00:00:00   /watchtower --label-enable --include-stopped --revive-stopped --cleanup --rolling-restart --stop-timeout=80s --http-api-update
myproject-web-1               appuser    338619   338597   0    12:00   ?     00:00:00   /bin/bash -e /rails/bin/docker-entrypoint.sh rails server
myproject-web-1               appuser    338653   338619   0    12:00   ?     00:00:00   flock -x /rails/data/migration-check.lock bundle exec rake db:prepare
myproject-web-1               appuser    338665   338653   46   12:00   ?     00:00:01   /usr/local/bundle/ruby/3.2.0/bin/rake db:prepare

[ndeloof]

compose top uses text/tabwriter which should manage alignment
columns are those reported by docker engine ContainerTop API, I agree we miss one to report the service process belongs to. Happy to review a PR if you can prepare one

[dmke]

Can I assume that ContainerTop returns always returns the columns in the same order, or shall I be defensive and ensure ordering of the container.Titles when running compose top?

[dmke]

@ndeloof, I have posted a first draft in #12391. Let me know what you think.