[#1382] neofs-cli: move netmap command to a separate package

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-cli/modules/netmap/get_epoch.go

@@ -0,0 +1,34 @@
+package netmap
+
+import (
+	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"
+	"github.com/spf13/cobra"
+)
+
+var getEpochCmd = &cobra.Command{
+	Use:   "epoch",
+	Short: "Get current epoch number",
+	Long:  "Get current epoch number",
+	Run: func(cmd *cobra.Command, args []string) {
+		p := key.GetOrGenerate(cmd)
+		cli := internalclient.GetSDKClientByFlag(cmd, p, commonflags.RPC)
+
+		var prm internalclient.NetworkInfoPrm
+		prm.SetClient(cli)
+
+		res, err := internalclient.NetworkInfo(prm)
+		common.ExitOnErr(cmd, "rpc error: %w", err)
+
+		netInfo := res.NetworkInfo()
+
+		cmd.Println(netInfo.CurrentEpoch())
+	},
+}
+
+func initGetEpochCmd() {
+	commonflags.Init(getEpochCmd)
+	commonflags.InitAPI(getEpochCmd)
+}