feat: add support for describe command (#96)

* feat: add support for rollout describe command

Signed-off-by: maanugh <[email protected]>

pkg/cmd/cmd.go

@@ -24,6 +24,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"github.com/openkruise/kruise-tools/pkg/cmd/create"
+	"github.com/openkruise/kruise-tools/pkg/cmd/describe"
 	cmdexec "github.com/openkruise/kruise-tools/pkg/cmd/exec"
 	"github.com/openkruise/kruise-tools/pkg/cmd/expose"
 	"github.com/openkruise/kruise-tools/pkg/cmd/migrate"
@@ -443,6 +444,7 @@ func NewKubectlCommand(in io.Reader, out, err io.Writer) *cobra.Command {
 	cmds.AddCommand(alpha)
 	cmds.AddCommand(NewCmdGenerateDocs(f, ioStreams))
 	cmds.AddCommand(NewAutoCompleteCommand())
+	cmds.AddCommand(describe.NewCmdDescibe(f, ioStreams))
 	cmds.AddCommand(cmdconfig.NewCmdConfig(clientcmd.NewDefaultPathOptions(), ioStreams))
 	cmds.AddCommand(plugin.NewCmdPlugin(ioStreams))
 	cmds.AddCommand(version.NewCmdVersion(f, ioStreams))

pkg/cmd/describe/describe.go

@@ -0,0 +1,50 @@
+package describe
+
+/*
+Copyright 2021 The Kruise 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.
+*/
+
+import (
+	"github.com/spf13/cobra"
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+	cmdutil "k8s.io/kubectl/pkg/cmd/util"
+	"k8s.io/kubectl/pkg/util/i18n"
+	"k8s.io/kubectl/pkg/util/templates"
+)
+
+var (
+	describeLong = templates.LongDesc(i18n.T(`
+		Show details of a rollout.`))
+
+	describeExample = templates.Examples(`
+		# Describe the rollout named rollout-demo
+		kubectl-kruise describe rollout rollout-demo`)
+)
+
+// NewCmdRollout returns a Command instance for 'rollout' sub command
+func NewCmdDescibe(f cmdutil.Factory, streams genericclioptions.IOStreams) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:                   "describe SUBCOMMAND",
+		DisableFlagsInUseLine: true,
+		Short:                 i18n.T("Show details of a specific resource or group of resources"),
+		Long:                  describeLong,
+		Example:               describeExample,
+		Run:                   cmdutil.DefaultSubCommandRun(streams.Out),
+	}
+	// subcommands
+	cmd.AddCommand(NewCmdDescribeRollout(f, streams))
+
+	return cmd
+}