vendor: initial vendor

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/docker/cli/kubernetes/check.go

@@ -0,0 +1,60 @@
+package kubernetes
+
+import (
+	apiv1alpha3 "github.com/docker/compose-on-kubernetes/api/compose/v1alpha3"
+	apiv1beta1 "github.com/docker/compose-on-kubernetes/api/compose/v1beta1"
+	apiv1beta2 "github.com/docker/compose-on-kubernetes/api/compose/v1beta2"
+	"github.com/pkg/errors"
+	apimachinerymetav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/discovery"
+)
+
+// StackVersion represents the detected Compose Component on Kubernetes side.
+type StackVersion string
+
+const (
+	// StackAPIV1Beta1 is returned if it's the most recent version available.
+	StackAPIV1Beta1 = StackVersion("v1beta1")
+	// StackAPIV1Beta2 is returned if it's the most recent version available.
+	StackAPIV1Beta2 = StackVersion("v1beta2")
+	// StackAPIV1Alpha3 is returned if it's the most recent version available, and experimental flag is on.
+	StackAPIV1Alpha3 = StackVersion("v1alpha3")
+)
+
+// GetStackAPIVersion returns the most appropriate stack API version installed.
+func GetStackAPIVersion(serverGroups discovery.ServerGroupsInterface, experimental bool) (StackVersion, error) {
+	groups, err := serverGroups.ServerGroups()
+	if err != nil {
+		return "", err
+	}
+
+	return getAPIVersion(groups, experimental)
+}
+
+func getAPIVersion(groups *metav1.APIGroupList, experimental bool) (StackVersion, error) {
+	switch {
+	case experimental && findVersion(apiv1alpha3.SchemeGroupVersion, groups.Groups):
+		return StackAPIV1Alpha3, nil
+	case findVersion(apiv1beta2.SchemeGroupVersion, groups.Groups):
+		return StackAPIV1Beta2, nil
+	case findVersion(apiv1beta1.SchemeGroupVersion, groups.Groups):
+		return StackAPIV1Beta1, nil
+	default:
+		return "", errors.New("failed to find a Stack API version")
+	}
+}
+
+func findVersion(stackAPI schema.GroupVersion, groups []apimachinerymetav1.APIGroup) bool {
+	for _, group := range groups {
+		if group.Name == stackAPI.Group {
+			for _, version := range group.Versions {
+				if version.Version == stackAPI.Version {
+					return true
+				}
+			}
+		}
+	}
+	return false
+}