Can I alias a subcommand? (shortening the output of `docker ps`)

Question

The docker command has a ps sub-command that emits very long lines:

$ docker ps -a
CONTAINER ID        IMAGE                                


        

Answer 1

You can alias subcommands. With aliasing, you still get the nice zsh completions as if you were typing the full command. That's why I prefer them over functions.

The equivalent of your alias is:

alias dp='docker ps --format "table {{.Image}}\t{{.Names}}\t{{.Ports}}'\t{{.Status}}"

But the full commands seem to now be recommended, and ls has replaced ps, which makes your alias now:

alias dp='docker container ls --format "table {{.Image}}\t{{.Names}}\t{{.Ports}}'\t{{.Status}}"

It's nice to have docker aliases for everything. For this, I've been working on a set of comprehensive aliases, which would have your alias as something like:

alias ddcls='docker container ls --format "table {{.Image}}\t{{.Names}}\t{{.Ports}}\t{{.Status}}"