chore(helm): add test coverage to pkg/helm

pkg/helm/client.go

@@ -17,6 +17,7 @@ limitations under the License.
 package helm // import "k8s.io/helm/pkg/helm"
 
 import (
+	"golang.org/x/net/context"
 	"google.golang.org/grpc"
 
 	"k8s.io/helm/pkg/chartutil"
@@ -44,7 +45,8 @@ type Client struct {
 
 // NewClient creates a new client.
 func NewClient(opts ...Option) *Client {
-	return new(Client).Init().Option(opts...)
+	var c Client
+	return c.Option(opts...)
 }
 
 // Option configures the helm client with the provided options
@@ -55,117 +57,271 @@ func (h *Client) Option(opts ...Option) *Client {
 	return h
 }
 
-// Init initializes the helm client with default options
-func (h *Client) Init() *Client {
-	return h
-}
-
 // ListReleases lists the current releases.
 func (h *Client) ListReleases(opts ...ReleaseListOption) (*rls.ListReleasesResponse, error) {
-	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+	req := &h.opts.listReq
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.list(ctx, req)
+}
+
+// InstallRelease installs a new chart and returns the release response.
+func (h *Client) InstallRelease(chstr, ns string, opts ...InstallOption) (*rls.InstallReleaseResponse, error) {
+	// load the chart to install
+	chart, err := chartutil.Load(chstr)
 	if err != nil {
 		return nil, err
 	}
-	defer c.Close()
 
-	return h.opts.rpcListReleases(rls.NewReleaseServiceClient(c), opts...)
+	// apply the install options
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+	req := &h.opts.instReq
+	req.Chart = chart
+	req.Namespace = ns
+	req.DryRun = h.opts.dryRun
+	req.DisableHooks = h.opts.disableHooks
+	req.ReuseName = h.opts.reuseName
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.install(ctx, req)
 }
 
-// InstallRelease installs a new chart and returns the release response.
-func (h *Client) InstallRelease(chStr, ns string, opts ...InstallOption) (*rls.InstallReleaseResponse, error) {
+// DeleteRelease uninstalls a named release and returns the response.
+func (h *Client) DeleteRelease(rlsName string, opts ...DeleteOption) (*rls.UninstallReleaseResponse, error) {
+	if h.opts.dryRun {
+		// In the dry run case, just see if the release exists
+		r, err := h.ReleaseContent(rlsName, nil)
+		if err != nil {
+			return &rls.UninstallReleaseResponse{}, err
+		}
+		return &rls.UninstallReleaseResponse{Release: r.Release}, nil
+	}
+
+	// apply the uninstall options
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+
+	req := &h.opts.uninstallReq
+	req.Name = rlsName
+	req.DisableHooks = h.opts.disableHooks
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.delete(ctx, req)
+}
+
+// UpdateRelease updates a release to a new/different chart
+func (h *Client) UpdateRelease(rlsName string, chstr string, opts ...UpdateOption) (*rls.UpdateReleaseResponse, error) {
+	// load the chart to update
+	chart, err := chartutil.Load(chstr)
+	if err != nil {
+		return nil, err
+	}
+
+	// apply the update options
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+	req := &h.opts.updateReq
+	req.Chart = chart
+	req.DryRun = h.opts.dryRun
+	req.Name = rlsName
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.update(ctx, req)
+}
+
+// GetVersion returns the server version
+func (h *Client) GetVersion(opts ...VersionOption) (*rls.GetVersionResponse, error) {
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+	req := &rls.GetVersionRequest{}
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.version(ctx, req)
+}
+
+// RollbackRelease rolls back a release to the previous version
+func (h *Client) RollbackRelease(rlsName string, opts ...RollbackOption) (*rls.RollbackReleaseResponse, error) {
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+	req := &h.opts.rollbackReq
+	req.DisableHooks = h.opts.disableHooks
+	req.DryRun = h.opts.dryRun
+	req.Name = rlsName
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.rollback(ctx, req)
+}
+
+// ReleaseStatus returns the given release's status.
+func (h *Client) ReleaseStatus(rlsName string, opts ...StatusOption) (*rls.GetReleaseStatusResponse, error) {
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+	req := &h.opts.statusReq
+	req.Name = rlsName
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.status(ctx, req)
+}
+
+// ReleaseContent returns the configuration for a given release.
+func (h *Client) ReleaseContent(rlsName string, opts ...ContentOption) (*rls.GetReleaseContentResponse, error) {
+	for _, opt := range opts {
+		opt(&h.opts)
+	}
+	req := &h.opts.contentReq
+	req.Name = rlsName
+	ctx := NewContext()
+
+	if h.opts.before != nil {
+		if err := h.opts.before(ctx, req); err != nil {
+			return nil, err
+		}
+	}
+	return h.content(ctx, req)
+}
+
+// Executes tiller.ListReleases RPC.
+func (h *Client) list(ctx context.Context, req *rls.ListReleasesRequest) (*rls.ListReleasesResponse, error) {
 	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
 	defer c.Close()
 
-	chart, err := chartutil.Load(chStr)
+	rlc := rls.NewReleaseServiceClient(c)
+	s, err := rlc.ListReleases(ctx, req)
 	if err != nil {
 		return nil, err
 	}
 
-	return h.opts.rpcInstallRelease(chart, rls.NewReleaseServiceClient(c), ns, opts...)
+	return s.Recv()
 }
 
-// DeleteRelease uninstalls a named release and returns the response.
-//
-// Note: there aren't currently any supported DeleteOptions, but they are
-// kept in the API signature as a placeholder for future additions.
-func (h *Client) DeleteRelease(rlsName string, opts ...DeleteOption) (*rls.UninstallReleaseResponse, error) {
+// Executes tiller.InstallRelease RPC.
+func (h *Client) install(ctx context.Context, req *rls.InstallReleaseRequest) (*rls.InstallReleaseResponse, error) {
 	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
 	defer c.Close()
 
-	return h.opts.rpcDeleteRelease(rlsName, rls.NewReleaseServiceClient(c), opts...)
+	rlc := rls.NewReleaseServiceClient(c)
+	return rlc.InstallRelease(ctx, req)
 }
 
-// UpdateRelease updates a release to a new/different chart
-func (h *Client) UpdateRelease(rlsName string, chStr string, opts ...UpdateOption) (*rls.UpdateReleaseResponse, error) {
+// Executes tiller.UninstallRelease RPC.
+func (h *Client) delete(ctx context.Context, req *rls.UninstallReleaseRequest) (*rls.UninstallReleaseResponse, error) {
 	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
 	defer c.Close()
 
-	chart, err := chartutil.Load(chStr)
+	rlc := rls.NewReleaseServiceClient(c)
+	return rlc.UninstallRelease(ctx, req)
+}
+
+// Executes tiller.UpdateRelease RPC.
+func (h *Client) update(ctx context.Context, req *rls.UpdateReleaseRequest) (*rls.UpdateReleaseResponse, error) {
+	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
+	defer c.Close()
 
-	return h.opts.rpcUpdateRelease(rlsName, chart, rls.NewReleaseServiceClient(c), opts...)
+	rlc := rls.NewReleaseServiceClient(c)
+	return rlc.UpdateRelease(ctx, req)
 }
 
-// GetVersion returns the server version
-//
-// Note: there aren't currently any supported StatusOptions,
-// but they are kept in the API signature as a placeholder for future additions.
-func (h *Client) GetVersion(opts ...VersionOption) (*rls.GetVersionResponse, error) {
+// Executes tiller.RollbackRelease RPC.
+func (h *Client) rollback(ctx context.Context, req *rls.RollbackReleaseRequest) (*rls.RollbackReleaseResponse, error) {
 	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
 	defer c.Close()
 
-	return h.opts.rpcGetVersion(rls.NewReleaseServiceClient(c), opts...)
+	rlc := rls.NewReleaseServiceClient(c)
+	return rlc.RollbackRelease(ctx, req)
 }
 
-// RollbackRelease rolls back a release to the previous version
-func (h *Client) RollbackRelease(rlsName string, opts ...RollbackOption) (*rls.RollbackReleaseResponse, error) {
+// Executes tiller.GetReleaseStatus RPC.
+func (h *Client) status(ctx context.Context, req *rls.GetReleaseStatusRequest) (*rls.GetReleaseStatusResponse, error) {
 	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
 	defer c.Close()
 
-	return h.opts.rpcRollbackRelease(rlsName, rls.NewReleaseServiceClient(c), opts...)
+	rlc := rls.NewReleaseServiceClient(c)
+	return rlc.GetReleaseStatus(ctx, req)
 }
 
-// ReleaseStatus returns the given release's status.
-//
-// Note: there aren't currently any  supported StatusOptions,
-// but they are kept in the API signature as a placeholder for future additions.
-func (h *Client) ReleaseStatus(rlsName string, opts ...StatusOption) (*rls.GetReleaseStatusResponse, error) {
+// Executes tiller.GetReleaseContent RPC.
+func (h *Client) content(ctx context.Context, req *rls.GetReleaseContentRequest) (*rls.GetReleaseContentResponse, error) {
 	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
 	defer c.Close()
 
-	return h.opts.rpcGetReleaseStatus(rlsName, rls.NewReleaseServiceClient(c), opts...)
+	rlc := rls.NewReleaseServiceClient(c)
+	return rlc.GetReleaseContent(ctx, req)
 }
 
-// ReleaseContent returns the configuration for a given release.
-//
-// Note: there aren't currently any supported ContentOptions, but
-// they are kept in the API signature as a placeholder for future additions.
-func (h *Client) ReleaseContent(rlsName string, opts ...ContentOption) (*rls.GetReleaseContentResponse, error) {
+// Executes tiller.GetVersion RPC.
+func (h *Client) version(ctx context.Context, req *rls.GetVersionRequest) (*rls.GetVersionResponse, error) {
 	c, err := grpc.Dial(h.opts.host, grpc.WithInsecure())
 	if err != nil {
 		return nil, err
 	}
 	defer c.Close()
 
-	return h.opts.rpcGetReleaseContent(rlsName, rls.NewReleaseServiceClient(c), opts...)
+	rlc := rls.NewReleaseServiceClient(c)
+	return rlc.GetVersion(ctx, req)
 }

pkg/helm/helm_test.go

+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package helm // import "k8s.io/helm/pkg/helm"
+
+import (
+	"errors"
+	"path/filepath"
+	"reflect"
+	"testing"
+
+	"github.com/golang/protobuf/proto"
+	"golang.org/x/net/context"
+
+	"k8s.io/helm/pkg/chartutil"
+	cpb "k8s.io/helm/pkg/proto/hapi/chart"
+	rls "k8s.io/helm/pkg/proto/hapi/release"
+	tpb "k8s.io/helm/pkg/proto/hapi/services"
+)
+
+// path to example charts relative to pkg/helm.
+const chartsDir = "../../docs/examples/"
+
+// sentinel error to indicate to the helm client to not send the request to tiller.
+var errSkip = errors.New("test: skip")
+
+// Verify ReleaseListOption's are applied to a ListReleasesRequest correctly.
+func TestListReleases_VerifyOptions(t *testing.T) {
+	// Options testdata
+	var limit = 2
+	var offset = "offset"
+	var filter = "filter"
+	var sortBy = int32(2)
+	var sortOrd = int32(1)
+	var codes = []rls.Status_Code{
+		rls.Status_FAILED,
+		rls.Status_DELETED,
+		rls.Status_DEPLOYED,
+		rls.Status_SUPERSEDED,
+	}
+
+	// Expected ListReleasesRequest message
+	exp := &tpb.ListReleasesRequest{
+		Limit:       int64(limit),
+		Offset:      offset,
+		Filter:      filter,
+		SortBy:      tpb.ListSort_SortBy(sortBy),
+		SortOrder:   tpb.ListSort_SortOrder(sortOrd),
+		StatusCodes: codes,
+	}
+
+	// Options used in ListReleases
+	ops := []ReleaseListOption{
+		ReleaseListSort(sortBy),
+		ReleaseListOrder(sortOrd),
+		ReleaseListLimit(limit),
+		ReleaseListOffset(offset),
+		ReleaseListFilter(filter),
+		ReleaseListStatuses(codes),
+	}
+
+	// BeforeCall option to intercept helm client ListReleasesRequest
+	b4c := BeforeCall(func(_ context.Context, msg proto.Message) error {
+		switch act := msg.(type) {
+		case *tpb.ListReleasesRequest:
+			t.Logf("ListReleasesRequest: %#+v\n", act)
+			assert(t, exp, act)
+		default:
+			t.Fatalf("expected message of type ListReleasesRequest, got %T\n", act)
+		}
+		return errSkip
+	})
+
+	NewClient(b4c).ListReleases(ops...)
+}
+
+// Verify InstallOption's are applied to an InstallReleaseRequest correctly.
+func TestInstallRelease_VerifyOptions(t *testing.T) {
+	// Options testdata
+	var disableHooks = true
+	var releaseName = "test"
+	var namespace = "default"
+	var reuseName = true
+	var dryRun = true
+	var chartName = "alpine"
+	var overrides = []byte("key1=value1,key2=value2")
+
+	// Expected InstallReleaseRequest message
+	exp := &tpb.InstallReleaseRequest{
+		Chart:        loadChart(t, chartName),
+		Values:       &cpb.Config{Raw: string(overrides)},
+		DryRun:       dryRun,
+		Name:         releaseName,
+		DisableHooks: disableHooks,
+		Namespace:    namespace,
+		ReuseName:    reuseName,
+	}
+
+	// Options used in InstallRelease
+	ops := []InstallOption{
+		ValueOverrides(overrides),
+		InstallDryRun(dryRun),
+		ReleaseName(releaseName),
+		InstallReuseName(reuseName),
+		InstallDisableHooks(disableHooks),
+	}
+
+	// BeforeCall option to intercept helm client InstallReleaseRequest
+	b4c := BeforeCall(func(_ context.Context, msg proto.Message) error {
+		switch act := msg.(type) {
+		case *tpb.InstallReleaseRequest:
+			t.Logf("InstallReleaseRequest: %#+v\n", act)
+			assert(t, exp, act)
+		default:
+			t.Fatalf("expected message of type InstallReleaseRequest, got %T\n", act)
+		}
+		return errSkip
+	})
+
+	NewClient(b4c).InstallRelease(chartName, namespace, ops...)
+}
+
+// Verify DeleteOptions's are applied to an UninstallReleaseRequest correctly.
+func TestDeleteRelease_VerifyOptions(t *testing.T) {
+	// Options testdata
+	var releaseName = "test"
+	var disableHooks = true
+	var purgeFlag = true
+
+	// Expected DeleteReleaseRequest message
+	exp := &tpb.UninstallReleaseRequest{
+		Name:         releaseName,
+		Purge:        purgeFlag,
+		DisableHooks: disableHooks,
+	}
+
+	// Options used in DeleteRelease
+	ops := []DeleteOption{
+		DeletePurge(purgeFlag),
+		DeleteDisableHooks(disableHooks),
+	}
+
+	// BeforeCall option to intercept helm client DeleteReleaseRequest
+	b4c := BeforeCall(func(_ context.Context, msg proto.Message) error {
+		switch act := msg.(type) {
+		case *tpb.UninstallReleaseRequest:
+			t.Logf("UninstallReleaseRequest: %#+v\n", act)
+			assert(t, exp, act)
+		default:
+			t.Fatalf("expected message of type UninstallReleaseRequest, got %T\n", act)
+		}
+		return errSkip
+	})
+
+	NewClient(b4c).DeleteRelease(releaseName, ops...)
+}
+
+// Verify UpdateOption's are applied to an UpdateReleaseRequest correctly.
+func TestUpdateRelease_VerifyOptions(t *testing.T) {
+	// Options testdata
+	var chartName = "alpine"
+	var releaseName = "test"
+	var disableHooks = true
+	var overrides = []byte("key1=value1,key2=value2")
+	var dryRun = false
+
+	// Expected UpdateReleaseRequest message
+	exp := &tpb.UpdateReleaseRequest{
+		Name:         releaseName,
+		Chart:        loadChart(t, chartName),
+		Values:       &cpb.Config{Raw: string(overrides)},
+		DryRun:       dryRun,
+		DisableHooks: disableHooks,
+	}
+
+	// Options used in UpdateRelease
+	ops := []UpdateOption{
+		UpgradeDryRun(dryRun),
+		UpdateValueOverrides(overrides),
+		UpgradeDisableHooks(disableHooks),
+	}
+
+	// BeforeCall option to intercept helm client UpdateReleaseRequest
+	b4c := BeforeCall(func(_ context.Context, msg proto.Message) error {
+		switch act := msg.(type) {
+		case *tpb.UpdateReleaseRequest:
+			t.Logf("UpdateReleaseRequest: %#+v\n", act)
+			assert(t, exp, act)
+		default:
+			t.Fatalf("expected message of type UpdateReleaseRequest, got %T\n", act)
+		}
+		return errSkip
+	})
+
+	NewClient(b4c).UpdateRelease(releaseName, chartName, ops...)
+}
+
+// Verify RollbackOption's are applied to a RollbackReleaseRequest correctly.
+func TestRollbackRelease_VerifyOptions(t *testing.T) {
+	// Options testdata
+	var disableHooks = true
+	var releaseName = "test"
+	var revision = int32(2)
+	var dryRun = true
+
+	// Expected RollbackReleaseRequest message
+	exp := &tpb.RollbackReleaseRequest{
+		Name:         releaseName,
+		DryRun:       dryRun,
+		Version:      revision,
+		DisableHooks: disableHooks,
+	}
+
+	// Options used in RollbackRelease
+	ops := []RollbackOption{
+		RollbackDryRun(dryRun),
+		RollbackVersion(revision),
+		RollbackDisableHooks(disableHooks),
+	}
+
+	// BeforeCall option to intercept helm client RollbackReleaseRequest
+	b4c := BeforeCall(func(_ context.Context, msg proto.Message) error {
+		switch act := msg.(type) {
+		case *tpb.RollbackReleaseRequest:
+			t.Logf("RollbackReleaseRequest: %#+v\n", act)
+			assert(t, exp, act)
+		default:
+			t.Fatalf("expected message of type RollbackReleaseRequest, got %T\n", act)
+		}
+		return errSkip
+	})
+
+	NewClient(b4c).RollbackRelease(releaseName, ops...)
+}
+
+// Verify StatusOption's are applied to a GetReleaseStatusRequest correctly.
+func TestReleaseStatus_VerifyOptions(t *testing.T) {
+	// Options testdata
+	var releaseName = "test"
+	var revision = int32(2)
+
+	// Expected GetReleaseStatusRequest message
+	exp := &tpb.GetReleaseStatusRequest{
+		Name:    releaseName,
+		Version: revision,
+	}
+
+	// BeforeCall option to intercept helm client GetReleaseStatusRequest
+	b4c := BeforeCall(func(_ context.Context, msg proto.Message) error {
+		switch act := msg.(type) {
+		case *tpb.GetReleaseStatusRequest:
+			t.Logf("GetReleaseStatusRequest: %#+v\n", act)
+			assert(t, exp, act)
+		default:
+			t.Fatalf("expected message of type GetReleaseStatusRequest, got %T\n", act)
+		}
+		return errSkip
+	})
+
+	NewClient(b4c).ReleaseStatus(releaseName, StatusReleaseVersion(revision))
+}
+
+// Verify ContentOption's are applied to a GetReleaseContentRequest correctly.
+func TestReleaseContent_VerifyOptions(t *testing.T) {
+	// Options testdata
+	var releaseName = "test"
+	var revision = int32(2)
+
+	// Expected GetReleaseContentRequest message
+	exp := &tpb.GetReleaseContentRequest{
+		Name:    releaseName,
+		Version: revision,
+	}
+
+	// BeforeCall option to intercept helm client GetReleaseContentRequest
+	b4c := BeforeCall(func(_ context.Context, msg proto.Message) error {
+		switch act := msg.(type) {
+		case *tpb.GetReleaseContentRequest:
+			t.Logf("GetReleaseContentRequest: %#+v\n", act)
+			assert(t, exp, act)
+		default:
+			t.Fatalf("expected message of type GetReleaseContentRequest, got %T\n", act)
+		}
+		return errSkip
+	})
+
+	NewClient(b4c).ReleaseContent(releaseName, ContentReleaseVersion(revision))
+}
+
+func assert(t *testing.T, expect, actual interface{}) {
+	if !reflect.DeepEqual(expect, actual) {
+		t.Fatalf("expected %#+v, actual %#+v\n", expect, actual)
+	}
+}
+
+func loadChart(t *testing.T, name string) *cpb.Chart {
+	c, err := chartutil.Load(filepath.Join(chartsDir, name))
+	if err != nil {
+		t.Fatalf("failed to load test chart (%q): %s\n", name, err)
+	}
+	return c
+}

pkg/helm/option.go

@@ -17,6 +17,7 @@ limitations under the License.
 package helm
 
 import (
+	"github.com/golang/protobuf/proto"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/metadata"
 
@@ -41,6 +42,8 @@ type options struct {
 	reuseName bool
 	// if set, skip running hooks
 	disableHooks bool
+	// name of release
+	releaseName string
 	// release list options are applied directly to the list releases request
 	listReq rls.ListReleasesRequest
 	// release install options are applied directly to the install release request
@@ -55,6 +58,8 @@ type options struct {
 	contentReq rls.GetReleaseContentRequest
 	// release rollback options are applied directly to the rollback release request
 	rollbackReq rls.RollbackReleaseRequest
+	// before intercepts client calls before sending
+	before func(context.Context, proto.Message) error
 }
 
 // Host specifies the host address of the Tiller release server, (default = ":44134").
@@ -64,6 +69,15 @@ func Host(host string) Option {
 	}
 }
 
+// BeforeCall returns an option that allows intercepting a helm client rpc
+// before being sent OTA to tiller. The intercepting function should return
+// an error to indicate that the call should not proceed or nil otherwise.
+func BeforeCall(fn func(context.Context, proto.Message) error) Option {
+	return func(opts *options) {
+		opts.before = fn
+	}
+}
+
 // ReleaseListOption allows specifying various settings
 // configurable by the helm client user for overriding
 // the defaults used when running the `helm list` command.
@@ -258,111 +272,8 @@ type UpdateOption func(*options)
 // running the `helm rollback` command.
 type RollbackOption func(*options)
 
-// RPC helpers defined on `options` type. Note: These actually execute the
-// the corresponding tiller RPC. There is no particular reason why these
-// are APIs are hung off `options`, they are internal to pkg/helm to remain
-// malleable.
-
-// Executes tiller.ListReleases RPC.
-func (o *options) rpcListReleases(rlc rls.ReleaseServiceClient, opts ...ReleaseListOption) (*rls.ListReleasesResponse, error) {
-	// apply release list options
-	for _, opt := range opts {
-		opt(o)
-	}
-	s, err := rlc.ListReleases(NewContext(), &o.listReq)
-	if err != nil {
-		return nil, err
-	}
-
-	return s.Recv()
-}
-
 // NewContext creates a versioned context.
 func NewContext() context.Context {
 	md := metadata.Pairs("x-helm-api-client", version.Version)
 	return metadata.NewContext(context.TODO(), md)
 }
-
-// Executes tiller.InstallRelease RPC.
-func (o *options) rpcInstallRelease(chr *cpb.Chart, rlc rls.ReleaseServiceClient, ns string, opts ...InstallOption) (*rls.InstallReleaseResponse, error) {
-	// apply the install options
-	for _, opt := range opts {
-		opt(o)
-	}
-	o.instReq.Chart = chr
-	o.instReq.Namespace = ns
-	o.instReq.DryRun = o.dryRun
-	o.instReq.DisableHooks = o.disableHooks
-	o.instReq.ReuseName = o.reuseName
-
-	return rlc.InstallRelease(NewContext(), &o.instReq)
-}
-
-// Executes tiller.UninstallRelease RPC.
-func (o *options) rpcDeleteRelease(rlsName string, rlc rls.ReleaseServiceClient, opts ...DeleteOption) (*rls.UninstallReleaseResponse, error) {
-	for _, opt := range opts {
-		opt(o)
-	}
-	if o.dryRun {
-		// In the dry run case, just see if the release exists
-		r, err := o.rpcGetReleaseContent(rlsName, rlc)
-		if err != nil {
-			return &rls.UninstallReleaseResponse{}, err
-		}
-		return &rls.UninstallReleaseResponse{Release: r.Release}, nil
-	}
-
-	o.uninstallReq.Name = rlsName
-	o.uninstallReq.DisableHooks = o.disableHooks
-
-	return rlc.UninstallRelease(NewContext(), &o.uninstallReq)
-}
-
-// Executes tiller.UpdateRelease RPC.
-func (o *options) rpcUpdateRelease(rlsName string, chr *cpb.Chart, rlc rls.ReleaseServiceClient, opts ...UpdateOption) (*rls.UpdateReleaseResponse, error) {
-	for _, opt := range opts {
-		opt(o)
-	}
-
-	o.updateReq.Chart = chr
-	o.updateReq.DryRun = o.dryRun
-	o.updateReq.Name = rlsName
-
-	return rlc.UpdateRelease(NewContext(), &o.updateReq)
-}
-
-// Executes tiller.UpdateRelease RPC.
-func (o *options) rpcRollbackRelease(rlsName string, rlc rls.ReleaseServiceClient, opts ...RollbackOption) (*rls.RollbackReleaseResponse, error) {
-	for _, opt := range opts {
-		opt(o)
-	}
-
-	o.rollbackReq.DryRun = o.dryRun
-	o.rollbackReq.Name = rlsName
-
-	return rlc.RollbackRelease(NewContext(), &o.rollbackReq)
-}
-
-// Executes tiller.GetReleaseStatus RPC.
-func (o *options) rpcGetReleaseStatus(rlsName string, rlc rls.ReleaseServiceClient, opts ...StatusOption) (*rls.GetReleaseStatusResponse, error) {
-	for _, opt := range opts {
-		opt(o)
-	}
-	o.statusReq.Name = rlsName
-	return rlc.GetReleaseStatus(NewContext(), &o.statusReq)
-}
-
-// Executes tiller.GetReleaseContent.
-func (o *options) rpcGetReleaseContent(rlsName string, rlc rls.ReleaseServiceClient, opts ...ContentOption) (*rls.GetReleaseContentResponse, error) {
-	for _, opt := range opts {
-		opt(o)
-	}
-	o.contentReq.Name = rlsName
-	return rlc.GetReleaseContent(NewContext(), &o.contentReq)
-}
-
-// Executes tiller.GetVersion RPC.
-func (o *options) rpcGetVersion(rlc rls.ReleaseServiceClient, opts ...VersionOption) (*rls.GetVersionResponse, error) {
-	req := &rls.GetVersionRequest{}
-	return rlc.GetVersion(NewContext(), req)
-}