Add prune command

Signed-off-by: Alex Kreidler <alex.kreidler@deciphernow.com>

cmd/helm/helm.go

@@ -190,6 +190,7 @@ func newRootCmd(args []string) *cobra.Command {
 		newRollbackCmd(nil, out),
 		newStatusCmd(nil, out),
 		newUpgradeCmd(nil, out),
+		newPruneCmd(nil, out),
 
 		newReleaseTestCmd(nil, out),
 		newResetCmd(nil, out),

cmd/helm/prune.go

@@ -0,0 +1,86 @@
+/*
+Copyright The Helm Authors.
+
+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 main
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/spf13/cobra"
+
+	"k8s.io/helm/pkg/helm"
+)
+
+const pruneDesc = `
+This command purges all deleted releases, cleaning them from removing them permanently so they can't be rolled back.
+`
+
+type pruneCmd struct {
+	disableHooks bool
+	timeout      int64
+
+	out    io.Writer
+	client helm.Interface
+}
+
+func newPruneCmd(c helm.Interface, out io.Writer) *cobra.Command {
+	prune := &pruneCmd{
+		out:    out,
+		client: c,
+	}
+
+	cmd := &cobra.Command{
+		Use:     "prune",
+		Short:   "Purges deleted releases",
+		Long:    pruneDesc,
+		PreRunE: func(_ *cobra.Command, _ []string) error { return setupConnection() },
+		RunE: func(cmd *cobra.Command, args []string) error {
+			prune.client = ensureHelmClient(prune.client)
+
+			if err := prune.run(); err != nil {
+				return err
+			}
+
+			fmt.Fprintf(out, "Releases pruned\n")
+			return nil
+		},
+	}
+
+	f := cmd.Flags()
+	settings.AddFlagsTLS(f)
+	f.BoolVar(&prune.disableHooks, "no-hooks", false, "Prevent hooks from running during deletion")
+	f.Int64Var(&prune.timeout, "timeout", 300, "Time in seconds to wait for any individual Kubernetes operation (like Jobs for hooks)")
+
+	// set defaults from environment
+	settings.InitTLS(f)
+
+	return cmd
+}
+
+func (d *pruneCmd) run() error {
+	opts := []helm.DeleteOption{
+		helm.DeleteDisableHooks(d.disableHooks),
+		helm.DeleteTimeout(d.timeout),
+	}
+	_, errs := d.client.PruneReleases(opts...)
+	for _, err := range errs {
+		if err != nil {
+			return prettyError(err)
+		}
+	}
+	return nil
+}

pkg/helm/client.go

@@ -29,6 +29,7 @@ import (
 	healthpb "google.golang.org/grpc/health/grpc_health_v1"
 	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/proto/hapi/chart"
+	"k8s.io/helm/pkg/proto/hapi/release"
 	rls "k8s.io/helm/pkg/proto/hapi/services"
 )
 
@@ -148,6 +149,25 @@ func (h *Client) DeleteRelease(rlsName string, opts ...DeleteOption) (*rls.Unins
 	return h.delete(ctx, req)
 }
 
+func (h *Client) PruneReleases(opts ...DeleteOption) ([]*rls.UninstallReleaseResponse, []error) {
+	res, err := h.ListReleases(ReleaseListStatuses([]release.Status_Code{release.Status_DELETED}))
+	if err != nil {
+		return nil, []error{err}
+	}
+	if res != nil && res.Releases != nil {
+		resps := make([]*rls.UninstallReleaseResponse, len(res.Releases))
+		errs := make([]error, len(res.Releases))
+		for _, rel := range res.Releases {
+			res, err := h.DeleteRelease(rel.Name, append(opts, DeletePurge(true))...)
+			resps = append(resps, res)
+			errs = append(errs, err)
+		}
+		return resps, errs
+	} else {
+		return nil, []error{fmt.Errorf("No deleted releases to prune")}
+	}
+}
+
 // UpdateRelease loads a chart from chstr and 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

pkg/helm/fake.go

@@ -19,6 +19,7 @@ package helm // import "k8s.io/helm/pkg/helm"
 import (
 	"bytes"
 	"errors"
+	"fmt"
 	"math/rand"
 	"strings"
 	"sync"
@@ -141,6 +142,29 @@ func (c *FakeClient) DeleteRelease(rlsName string, opts ...DeleteOption) (*rls.U
 	return nil, storageerrors.ErrReleaseNotFound(rlsName)
 }
 
+func (c *FakeClient) PruneReleases(opts ...DeleteOption) ([]*rls.UninstallReleaseResponse, []error) {
+	relsToDelete := make([]*release.Release, 0)
+	for _, rel := range c.Rels {
+		if rel.Info.GetStatus().Code == release.Status_DELETED {
+			relsToDelete = append(relsToDelete, rel)
+		}
+	}
+	res := &rls.ListReleasesResponse{Releases: relsToDelete}
+
+	if res != nil && res.Releases != nil {
+		resps := make([]*rls.UninstallReleaseResponse, len(res.Releases))
+		errs := make([]error, len(res.Releases))
+		for _, rel := range res.Releases {
+			res, err := c.DeleteRelease(rel.Name, append(opts, DeletePurge(true))...)
+			resps = append(resps, res)
+			errs = append(errs, err)
+		}
+		return resps, errs
+	} else {
+		return nil, []error{fmt.Errorf("No deleted releases to prune")}
+	}
+}
+
 // GetVersion returns a fake version
 func (c *FakeClient) GetVersion(opts ...VersionOption) (*rls.GetVersionResponse, error) {
 	return &rls.GetVersionResponse{

pkg/helm/interface.go

@@ -27,6 +27,7 @@ type Interface interface {
 	InstallRelease(chStr, namespace string, opts ...InstallOption) (*rls.InstallReleaseResponse, error)
 	InstallReleaseFromChart(chart *chart.Chart, namespace string, opts ...InstallOption) (*rls.InstallReleaseResponse, error)
 	DeleteRelease(rlsName string, opts ...DeleteOption) (*rls.UninstallReleaseResponse, error)
+	PruneReleases(opts ...DeleteOption) ([]*rls.UninstallReleaseResponse, []error)
 	ReleaseStatus(rlsName string, opts ...StatusOption) (*rls.GetReleaseStatusResponse, error)
 	UpdateRelease(rlsName, chStr string, opts ...UpdateOption) (*rls.UpdateReleaseResponse, error)
 	UpdateReleaseFromChart(rlsName string, chart *chart.Chart, opts ...UpdateOption) (*rls.UpdateReleaseResponse, error)