docker -ps --format output with substr

Question

There is a command: docker ps --format "{{.ID}}\t{{.Command}}" --no-trunc (used https://pkg.go.dev/text/template)

which outputs the full text of the '{{.Command}}' (which I need), but outputs too long '{{.ID}}'

I need to take the first 12 characters from '{{.ID}}' and all characters (--no-trunc) from '{{.Command}}'. How to do it?

Answer 1

You can use the ´printf` function in the Go template like this

docker ps --format "{{printf \"%.12s\" .ID}}\t{{.Command}}" --no-trunc