Record the progress of the OSPP 2023 hgctl project (#453)

pkg/cmd/hgctl/plugin/ls/ls.go

@@ -0,0 +1,78 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// 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 ls
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"time"
+
+	k8s "github.com/alibaba/higress/pkg/cmd/hgctl/kubernetes"
+	"github.com/alibaba/higress/pkg/cmd/options"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+	"k8s.io/apimachinery/pkg/util/duration"
+	"k8s.io/cli-runtime/pkg/printers"
+	cmdutil "k8s.io/kubectl/pkg/cmd/util"
+)
+
+func NewCommand() *cobra.Command {
+	lsCmd := &cobra.Command{
+		Use:     "ls",
+		Aliases: []string{"l"},
+		Short:   "List all installed WASM plugins",
+		Example: `  hgctl plugin ls`,
+		Run: func(cmd *cobra.Command, args []string) {
+			cmdutil.CheckErr(runLs(cmd.OutOrStdout()))
+		},
+	}
+
+	flags := lsCmd.PersistentFlags()
+	options.AddKubeConfigFlags(flags)
+	k8s.AddHigressNamespaceFlags(flags)
+
+	return lsCmd
+}
+
+func runLs(w io.Writer) error {
+	dynCli, err := k8s.NewDynamicClient(options.DefaultConfigFlags.ToRawKubeConfigLoader())
+	if err != nil {
+		return errors.Wrap(err, "failed to build kubernetes client")
+	}
+	cli := k8s.NewWasmPluginClient(dynCli)
+
+	list, err := cli.List(context.TODO())
+	if err != nil {
+		return errors.Wrap(err, "failed to list all wasm plugins")
+	}
+
+	printer := printers.GetNewTabWriter(w)
+	now := time.Now()
+	fmt.Fprintf(printer, "NAME\tAGE\n")
+	for _, item := range list.Items {
+		fmt.Fprintf(printer, "%s\t%s\n", item.GetName(), getAge(now, item.GetCreationTimestamp().Time))
+	}
+	if err = printer.Flush(); err != nil {
+		return errors.Wrap(err, "failed to flush output")
+	}
+
+	return nil
+}
+
+func getAge(now time.Time, create time.Time) string {
+	return duration.ShortHumanDuration(now.Sub(create))
+}