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

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

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

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

@@ -1,6 +1,9 @@
 package container
 
 import (
+	"strings"
+
+	v2object "github.com/nspcc-dev/neofs-api-go/v2/object"
 	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"
@@ -8,9 +11,20 @@ import (
 	objectCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/object"
 	sessionCli "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/modules/session"
 	"github.com/nspcc-dev/neofs-sdk-go/object"
+	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"github.com/spf13/cobra"
 )
 
+// flags of list-object command
+const (
+	flagListObjectPrintAttr = "with-attr"
+)
+
+// flag vars of list-objects command
+var (
+	flagVarListObjectsPrintAttr bool
+)
+
 var listContainerObjectsCmd = &cobra.Command{
 	Use:   "list-objects",
 	Short: "List existing objects in container",
@@ -23,19 +37,48 @@ var listContainerObjectsCmd = &cobra.Command{
 
 		pk := key.GetOrGenerate(cmd)
 
-		var prm internalclient.SearchObjectsPrm
-		sessionCli.Prepare(cmd, id, nil, pk, &prm)
-		objectCli.Prepare(cmd, &prm)
-		prm.SetContainerID(id)
-		prm.SetFilters(*filters)
+		var prmSearch internalclient.SearchObjectsPrm
+		var prmHead internalclient.HeadObjectPrm
 
-		res, err := internalclient.SearchObjects(prm)
+		if flagVarListObjectsPrintAttr {
+			sessionCli.Prepare(cmd, id, nil, pk, &prmSearch, &prmHead)
+			objectCli.Prepare(cmd, &prmSearch, &prmHead)
+		} else {
+			sessionCli.Prepare(cmd, id, nil, pk, &prmSearch)
+			objectCli.Prepare(cmd, &prmSearch)
+		}
+
+		prmSearch.SetContainerID(id)
+		prmSearch.SetFilters(*filters)
+
+		res, err := internalclient.SearchObjects(prmSearch)
 		common.ExitOnErr(cmd, "rpc error: %w", err)
 
 		objectIDs := res.IDList()
 
 		for i := range objectIDs {
 			cmd.Println(objectIDs[i].String())
+
+			if flagVarListObjectsPrintAttr {
+				var addr oid.Address
+				addr.SetContainer(id)
+				addr.SetObject(objectIDs[i])
+				prmHead.SetAddress(addr)
+
+				resHead, err := internalclient.HeadObject(prmHead)
+				if err == nil {
+					attrs := resHead.Header().Attributes()
+					for i := range attrs {
+						attrKey := attrs[i].Key()
+						if !strings.HasPrefix(attrKey, v2object.SysAttributePrefix) {
+							// FIXME(@cthulhu-rider): neofs-sdk-go#226 use dedicated method to skip system attributes
+							cmd.Printf("  %s: %s\n", attrKey, attrs[i].Value())
+						}
+					}
+				} else {
+					cmd.Printf("  failed to read attributes: %v\n", err)
+				}
+			}
 		}
 	},
 }
@@ -47,4 +90,7 @@ func initContainerListObjectsCmd() {
 	flags := listContainerObjectsCmd.Flags()
 
 	flags.StringVar(&containerID, "cid", "", "container ID")
+	flags.BoolVar(&flagVarListObjectsPrintAttr, flagListObjectPrintAttr, false,
+		"request and print user attributes of each object",
+	)
 }

cmd/neofs-cli/modules/session/util.go

@@ -41,6 +41,7 @@ func Prepare(cmd *cobra.Command, cnr cid.ID, obj *oid.ID, key *ecdsa.PrivateKey,
 	}
 
 	for i := range prms {
+		tok := tok
 		switch prms[i].(type) {
 		case *internalclient.GetObjectPrm:
 			tok.ForVerb(session.VerbObjectGet)