Merge PR #3426: Various changes to version cmd, revert those which previously broke ABI

* version prints out short info by default

Handle -o json, add --long flag to print full version info.

* Add distclean target to Makefile

* Update PENDING.md

* Add missing targets in .PHONY

version/command.go

@@ -1,31 +1,48 @@
 package version
 
 import (
+	"encoding/json"
 	"fmt"
-	"runtime"
 
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+
+	"github.com/tendermint/tendermint/libs/cli"
+)
+
+const (
+	flagLong = "long"
 )
 
 var (
+
 	// VersionCmd prints out the current sdk version
 	VersionCmd = &cobra.Command{
 		Use:   "version",
 		Short: "Print the app version",
-		Run:   printVersion,
+		RunE: func(_ *cobra.Command, _ []string) error {
+			verInfo := newVersionInfo()
+
+			if !viper.GetBool(flagLong) {
+				fmt.Println(verInfo.CosmosSDK)
+				return nil
+			}
+
+			if viper.GetString(cli.OutputFlag) != "json" {
+				fmt.Print(verInfo)
+				return nil
+			}
+
+			bz, err := json.Marshal(verInfo)
+			if err != nil {
+				return err
+			}
+			fmt.Println(string(bz))
+			return nil
+		},
 	}
 )
 
-// return version of CLI/node and commit hash
-func GetVersion() string {
-	return Version
-}
-
-// CMD
-func printVersion(cmd *cobra.Command, args []string) {
-	fmt.Println("cosmos-sdk:", GetVersion())
-	fmt.Println("git commit:", Commit)
-	fmt.Println("vendor hash:", VendorDirHash)
-	fmt.Printf("go version %s %s/%s\n",
-		runtime.Version(), runtime.GOOS, runtime.GOARCH)
+func init() {
+	VersionCmd.Flags().Bool(flagLong, false, "Print long version information")
 }

version/version.go

@@ -1,9 +1,34 @@
 //nolint
 package version
 
+import (
+	"fmt"
+	"runtime"
+)
+
 // Variables set by build flags
 var (
 	Commit        = ""
 	Version       = ""
 	VendorDirHash = ""
 )
+
+type versionInfo struct {
+	CosmosSDK     string `json:"cosmos_sdk"`
+	GitCommit     string `json:"commit"`
+	VendorDirHash string `json:"vendor_hash"`
+	GoVersion     string `json:"go"`
+}
+
+func (v versionInfo) String() string {
+	return fmt.Sprintf(`cosmos-sdk: %s
+git commit: %s
+vendor hash: %s
+%s`, v.CosmosSDK, v.GitCommit, v.VendorDirHash, v.GoVersion)
+}
+
+func newVersionInfo() versionInfo {
+	return versionInfo{
+		Version, Commit, VendorDirHash, fmt.Sprintf("go version %s %s/%s\n",
+			runtime.Version(), runtime.GOOS, runtime.GOARCH)}
+}