feat(helm): added new helm notes command to display notes provided by the chart of a release

Signed-off-by: Arash Deshmeh <adeshmeh@ca.ibm.com>

cmd/helm/get.go

@@ -75,6 +75,7 @@ func newGetCmd(client helm.Interface, out io.Writer) *cobra.Command {
 	cmd.AddCommand(addFlagsTLS(newGetValuesCmd(nil, out)))
 	cmd.AddCommand(addFlagsTLS(newGetManifestCmd(nil, out)))
 	cmd.AddCommand(addFlagsTLS(newGetHooksCmd(nil, out)))
+	cmd.AddCommand(addFlagsTLS(newGetNotesCmd(nil, out)))
 
 	return cmd
 }

cmd/helm/get_notes.go

@@ -0,0 +1,77 @@
+/*
+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"
+)
+
+var getNotesHelp = `
+This command shows notes provided by the chart of a named release.
+`
+
+type getNotesCmd struct {
+	release string
+	out     io.Writer
+	client  helm.Interface
+	version int32
+}
+
+func newGetNotesCmd(client helm.Interface, out io.Writer) *cobra.Command {
+	get := &getNotesCmd{
+		out:    out,
+		client: client,
+	}
+
+	cmd := &cobra.Command{
+		Use:     "notes [flags] RELEASE_NAME",
+		Short:   "displays the notes of the named release",
+		Long:    getNotesHelp,
+		PreRunE: func(_ *cobra.Command, _ []string) error { return setupConnection() },
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if len(args) == 0 {
+				return errReleaseRequired
+			}
+			get.release = args[0]
+			if get.client == nil {
+				get.client = newClient()
+			}
+			return get.run()
+		},
+	}
+
+	cmd.PersistentFlags().Int32Var(&get.version, "revision", 0, "get the notes of the named release with revision")
+
+	return cmd
+}
+
+func (n *getNotesCmd) run() error {
+	res, err := n.client.ReleaseStatus(n.release, helm.StatusReleaseVersion(n.version))
+	if err != nil {
+		return prettyError(err)
+	}
+
+	if len(res.Info.Status.Notes) > 0 {
+		fmt.Fprintf(n.out, "NOTES:\n%s\n", res.Info.Status.Notes)
+	}
+	return nil
+}

cmd/helm/get_notes_test.go

@@ -0,0 +1,52 @@
+/*
+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 (
+	"io"
+	"testing"
+
+	"github.com/spf13/cobra"
+
+	"k8s.io/helm/pkg/helm"
+	"k8s.io/helm/pkg/proto/hapi/release"
+)
+
+func TestGetNotesCmd(t *testing.T) {
+	tests := []releaseCase{
+		{
+			name:     "get notes of a deployed release",
+			args:     []string{"flummoxed-chickadee"},
+			expected: "NOTES:\nrelease notes\n",
+			rels: []*release.Release{
+				releaseMockWithStatus(&release.Status{
+					Code:  release.Status_DEPLOYED,
+					Notes: "release notes",
+				}),
+			},
+		},
+		{
+			name: "get notes requires release name arg",
+			err:  true,
+		},
+	}
+
+	runReleaseCases(t, tests, func(c *helm.FakeClient, out io.Writer) *cobra.Command {
+		return newGetNotesCmd(c, out)
+	})
+
+}

docs/helm/helm.md

@@ -70,4 +70,4 @@ Environment:
 * [helm verify](helm_verify.md)	 - verify that a chart at the given path has been signed and is valid
 * [helm version](helm_version.md)	 - print the client/server version information
 
-###### Auto generated by spf13/cobra on 1-Aug-2018
+###### Auto generated by spf13/cobra on 1-Sep-2018

docs/helm/helm_get.md

@@ -51,6 +51,7 @@ helm get [flags] RELEASE_NAME
 * [helm](helm.md)	 - The Helm package manager for Kubernetes.
 * [helm get hooks](helm_get_hooks.md)	 - download all hooks for a named release
 * [helm get manifest](helm_get_manifest.md)	 - download the manifest for a named release
+* [helm get notes](helm_get_notes.md)	 - displays the notes of the named release
 * [helm get values](helm_get_values.md)	 - download the values file for a named release
 
-###### Auto generated by spf13/cobra on 10-Aug-2018
+###### Auto generated by spf13/cobra on 1-Sep-2018

docs/helm/helm_get_notes.md

@@ -0,0 +1,44 @@
+## helm get notes
+
+displays the notes of the named release
+
+### Synopsis
+
+
+This command shows notes provided by the chart of a named release.
+
+
+```
+helm get notes [flags] RELEASE_NAME
+```
+
+### Options
+
+```
+  -h, --help                  help for notes
+      --revision int32        get the notes of the named release with revision
+      --tls                   enable TLS for request
+      --tls-ca-cert string    path to TLS CA certificate file (default "$HELM_HOME/ca.pem")
+      --tls-cert string       path to TLS certificate file (default "$HELM_HOME/cert.pem")
+      --tls-hostname string   the server name used to verify the hostname on the returned certificates from the server
+      --tls-key string        path to TLS key file (default "$HELM_HOME/key.pem")
+      --tls-verify            enable TLS for request and verify remote
+```
+
+### Options inherited from parent commands
+
+```
+      --debug                           enable verbose output
+      --home string                     location of your Helm config. Overrides $HELM_HOME (default "~/.helm")
+      --host string                     address of Tiller. Overrides $HELM_HOST
+      --kube-context string             name of the kubeconfig context to use
+      --kubeconfig string               absolute path to the kubeconfig file to use
+      --tiller-connection-timeout int   the duration (in seconds) Helm will wait to establish a connection to tiller (default 300)
+      --tiller-namespace string         namespace of Tiller (default "kube-system")
+```
+
+### SEE ALSO
+
+* [helm get](helm_get.md)	 - download a named release
+
+###### Auto generated by spf13/cobra on 1-Sep-2018