[#1649] cli: Add option to print attributes in list

Define `--with-attr` flag of `container list` which makes the command to
request and print user attributes for each found element.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-cli/modules/container/list.go

@@ -1,15 +1,27 @@
 package container
 
 import (
+	"strings"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/container"
 	internalclient "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/client"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
-	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	"github.com/nspcc-dev/neofs-sdk-go/user"
 	"github.com/spf13/cobra"
 )
 
+// flags of list command
+const (
+	flagListPrintAttr = "with-attr"
+)
+
+// flag vars of list command
+var (
+	flagVarListPrintAttr bool
+)
+
 var containerOwner string
 
 var listContainersCmd = &cobra.Command{
@@ -37,8 +49,29 @@ var listContainersCmd = &cobra.Command{
 		res, err := internalclient.ListContainers(prm)
 		common.ExitOnErr(cmd, "rpc error: %w", err)
 
-		// print to stdout
-		prettyPrintContainerList(cmd, res.IDList())
+		var prmGet internalclient.GetContainerPrm
+		prmGet.SetClient(cli)
+
+		list := res.IDList()
+		for i := range list {
+			cmd.Println(list[i].String())
+
+			if flagVarListPrintAttr {
+				prmGet.SetContainer(list[i])
+
+				res, err := internalclient.GetContainer(prmGet)
+				if err == nil {
+					res.Container().IterateAttributes(func(key, val string) {
+						if !strings.HasPrefix(key, container.SysAttributePrefix) {
+							// FIXME(@cthulhu-rider): neofs-sdk-go#314 use dedicated method to skip system attributes
+							cmd.Printf("  %s: %s\n", key, val)
+						}
+					})
+				} else {
+					cmd.Printf("  failed to read attributes: %v\n", err)
+				}
+			}
+		}
 	},
 }
 
@@ -48,10 +81,7 @@ func initContainerListContainersCmd() {
 	flags := listContainersCmd.Flags()
 
 	flags.StringVar(&containerOwner, "owner", "", "owner of containers (omit to use owner from private key)")
-}
-
-func prettyPrintContainerList(cmd *cobra.Command, list []cid.ID) {
-	for i := range list {
-		cmd.Println(list[i].String())
-	}
+	flags.BoolVar(&flagVarListPrintAttr, flagListPrintAttr, false,
+		"request and print attributes of each container",
+	)
 }