Add tendermint version command (#3285)

PENDING.md

@@ -19,6 +19,7 @@ BREAKING CHANGES
   * https://github.com/cosmos/cosmos-sdk/issues/2838 - Move store keys to constants
   * [\#3162](https://github.com/cosmos/cosmos-sdk/issues/3162) The `--gas` flag now takes `auto` instead of `simulate`
     in order to trigger a simulation of the tx before the actual execution.
+  * [\#3285](https://github.com/cosmos/cosmos-sdk/pull/3285) New `gaiad tendermint version` to print libs versions
 
 * SDK
   * [staking] \#2513 Validator power type from Dec -> Int

server/tm_cmds.go

@@ -11,11 +11,20 @@ import (
 	tcmd "github.com/tendermint/tendermint/cmd/tendermint/commands"
 	"github.com/tendermint/tendermint/p2p"
 	pvm "github.com/tendermint/tendermint/privval"
+	tversion "github.com/tendermint/tendermint/version"
 
 	"github.com/cosmos/cosmos-sdk/client"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
+const (
+	versionString = `Tendermint: %s
+ABCI: %s
+BlockProtocol: %d
+P2PProtocol: %d
+`
+)
+
 // ShowNodeIDCmd - ported from Tendermint, dump node ID to stdout
 func ShowNodeIDCmd(ctx *Context) *cobra.Command {
 	return &cobra.Command{
@@ -89,6 +98,25 @@ func ShowAddressCmd(ctx *Context) *cobra.Command {
 	return cmd
 }
 
+// VersionCmd prints tendermint and ABCI version numbers.
+func VersionCmd(ctx *Context) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "version",
+		Short: "Print tendermint libraries' version",
+		Long: `Print protocols' and libraries' version numbers
+against which this app has been compiled.
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+
+			fmt.Printf(versionString, tversion.Version, tversion.ABCIVersion,
+				tversion.BlockProtocol.Uint64(), tversion.P2PProtocol.Uint64())
+
+			return nil
+		},
+	}
+	return cmd
+}
+
 func printlnJSON(v interface{}) error {
 	cdc := codec.New()
 	codec.RegisterCrypto(cdc)

server/util.go

@@ -142,6 +142,7 @@ func AddCommands(
 		ShowNodeIDCmd(ctx),
 		ShowValidatorCmd(ctx),
 		ShowAddressCmd(ctx),
+		VersionCmd(ctx),
 	)
 
 	rootCmd.AddCommand(