Use underlying `NewKubernetesConfig` directly from compose-on-kubernetes.

The comment on `github.com/docker/cli/kubernetes.NewKubernetesConfig` said:

    // Deprecated: Use github.com/docker/compose-on-kubernetes/api.NewKubernetesConfig instead

By making this switch in `github.com/docker/cli/context/kubernetes/load.go` we
break a vendoring chain:

`github.com/docker/cli/cli/command`
→ `vendor/github.com/docker/cli/cli/context/kubernetes/load.go`
  → `vendor/github.com/docker/cli/kubernetes`
     → `github.com/docker/compose-on-kubernetes/api/compose/...`

This means that projects which just want `github.com/docker/cli/cli/command`
(which is itself pulled in transitively by
`github.com/docker/cli/cli-plugins/plugin`) which do not themselves need the
compose-on-kubernetes API avoid a huge pile of transitive dependencies.

On one of my private projects the diff on the vendor dir is:

    280 files changed, 21 insertions(+), 211346 deletions(-)

and includes dropping:

* `github.com/docker/compose-on-kubernetes/api/compose/{clone,impersonation}`
* `github.com/docker/compose-on-kubernetes/api/compose/{v1alpha3,v1beta1,v1beta2,v1beta3}`
* `github.com/google/btree`
* `github.com/googleapis/gnostic`
* `github.com/gregjones/httpcache`
* `github.com/peterbourgon/diskv`
* `k8s.io/api/*` (_lots_ of subpackages)
* `k8s.io/client-go/{discovery,kubernetes/scheme}`

and I've gone from:

    $ du -sh vendor/k8s.io/
    8.1M	vendor/k8s.io/

to:

    $ du -sh vendor/k8s.io/
    2.1M	vendor/k8s.io/

(overall I went from 36M → 29M of vendor dir for this particular project)

The change to `cli/command/system/version.go` is just for consistency and
allows us to drop the now unused alias.

Signed-off-by: Ian Campbell <ijc@docker.com>
3 files changed
tree: 2aba96847c44e1dacf0553787fa048bd42038982
  1. .github/
  2. cli/
  3. cli-plugins/
  4. cmd/
  5. contrib/
  6. dockerfiles/
  7. docs/
  8. e2e/
  9. experimental/
  10. internal/
  11. kubernetes/
  12. man/
  13. opts/
  14. scripts/
  15. service/
  16. templates/
  17. types/
  18. vendor/
  19. .dockerignore
  20. .gitignore
  21. .mailmap
  22. appveyor.yml
  23. AUTHORS
  24. circle.yml
  25. codecov.yml
  26. CONTRIBUTING.md
  27. docker.Makefile
  28. gometalinter.json
  29. Jenkinsfile
  30. LICENSE
  31. MAINTAINERS
  32. Makefile
  33. NOTICE
  34. poule.yml
  35. README.md
  36. TESTING.md
  37. vendor.conf
  38. VERSION
README.md

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docker/cli

This repository is the home of the cli used in the Docker CE and Docker EE products.

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