DockerCLI/cmd
Sebastiaan van Stijn 1df6b68111
Mark checkpoint feature as Linux-only, and homogenize error messages
This patch adds annotations to mark the checkpoint commands as Linux only, which
hides them if the daemon is running a non-matching operating-system type;

Before:

    docker

    Usage:	docker COMMAND

    A self-sufficient runtime for containers

    ...

    Management Commands:
      config      Manage Docker configs
      container   Manage containers
      image       Manage images

After:

    docker

    Usage:	docker COMMAND

    A self-sufficient runtime for containers

    ...

    Management Commands:
      checkpoint  Manage checkpoints
      config      Manage Docker configs
      container   Manage containers
      image       Manage images

This change also prints errors when attempting to use checkpoint commands or
flags if the feature is not supported by the Daemon's operating system;

    $ docker checkpoint --help
    docker checkpoint is only supported on a Docker daemon running on linux, but the Docker daemon is running on windows

    $ docker checkpoint create --help
    docker checkpoint create is only supported on a Docker daemon running on linux, but the Docker daemon is running on windows

    $ docker checkpoint ls --help
    docker checkpoint ls is only supported on a Docker daemon running on linux, but the Docker daemon is running on windows

    $ docker checkpoint rm --help
    docker checkpoint rm is only supported on a Docker daemon running on linux, but the Docker daemon is running on windows

    $ docker container start --checkpoint=foo mycontainer
    "--checkpoint" requires the Docker daemon to run on linux, but the Docker daemon is running on windows

    $ docker container start --checkpoint-dir=/foo/bar mycontainer
    "--checkpoint-dir" requires the Docker daemon to run on linux, but the Docker daemon is running on windows

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2018-05-31 22:25:06 +02:00
..
docker Mark checkpoint feature as Linux-only, and homogenize error messages 2018-05-31 22:25:06 +02:00