Avoid importing k8s.io/kubernetes from pkg/helm

When writing a helm client (e.g. a helm plugin) that talks to tiller importing k8s.io/helm/pkg/helm to get the grpc client is key.
This pkg should not have a dependency to the k8s.io/kubernetes to avoid pulling in a lot of code that is only used within tiller and blow up binary sizes.

Signed-off-by: Fabian Ruff <fabian@progra.de>

pkg/helm/fake.go

@@ -19,6 +19,7 @@ package helm // import "k8s.io/helm/pkg/helm"
 import (
 	"bytes"
 	"errors"
+	"fmt"
 	"math/rand"
 	"strings"
 	"sync"
@@ -31,7 +32,6 @@ import (
 	rls "k8s.io/helm/pkg/proto/hapi/services"
 	"k8s.io/helm/pkg/proto/hapi/version"
 	"k8s.io/helm/pkg/renderutil"
-	storage "k8s.io/helm/pkg/storage/driver"
 )
 
 // FakeClient implements Interface
@@ -138,7 +138,7 @@ func (c *FakeClient) DeleteRelease(rlsName string, opts ...DeleteOption) (*rls.U
 		}
 	}
 
-	return nil, storage.ErrReleaseNotFound(rlsName)
+	return nil, fmt.Errorf("release: %q not found", rlsName)
 }
 
 // GetVersion returns a fake version
@@ -212,7 +212,7 @@ func (c *FakeClient) ReleaseStatus(rlsName string, opts ...StatusOption) (*rls.G
 			}, nil
 		}
 	}
-	return nil, storage.ErrReleaseNotFound(rlsName)
+	return nil, fmt.Errorf("release: %q not found", rlsName)
 }
 
 // ReleaseContent returns the configuration for the matching release name in the fake release client.
@@ -224,7 +224,7 @@ func (c *FakeClient) ReleaseContent(rlsName string, opts ...ContentOption) (resp
 			}, nil
 		}
 	}
-	return resp, storage.ErrReleaseNotFound(rlsName)
+	return resp, fmt.Errorf("release: %q not found", rlsName)
 }
 
 // ReleaseHistory returns a release's revision history.

pkg/helm/helm_test.go

@@ -18,8 +18,10 @@ package helm // import "k8s.io/helm/pkg/helm"
 
 import (
 	"errors"
+	"os/exec"
 	"path/filepath"
 	"reflect"
+	"strings"
 	"testing"
 
 	"github.com/golang/protobuf/proto"
@@ -361,3 +363,15 @@ func loadChart(t *testing.T, name string) *cpb.Chart {
 	}
 	return c
 }
+
+func TestDoesNotImportKubernetes(t *testing.T) {
+	cmd := exec.Command("go", "list", "-f", "{{.Deps}}", ".")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("Failed to execute %s %s: %s", cmd.Path, strings.Join(cmd.Args, " "), err)
+	}
+
+	if strings.Contains(string(output), "k8s.io/kubernetes") {
+		t.Fatal("k8s.io/helm/pkg/helm contains a dependency on k8s.io/kubernetes")
+	}
+}