mkdir -p ~/.config/fish/completions cp docker.fish ~/.config/fish/completions
こうなる。
docker images attach (Attach to a running container) port (Lookup the public-facing port that is NAT-ed to PRIVATE_PORT) build (Build an image from a Dockerfile) ps (List containers) commit (Create a new image from a container's changes) pull (Pull an image or a repository from a Docker registry server) cp (Copy files/folders between a container and the local filesystem) push (Push an image or a repository to a Docker registry server)
のはいいのですが、fish本体に組み込みたいなあっていう気持ちはあります。