[FAB-4350] Add version cmd to configtxgen

Adds a version cmd to configtxgen.
Version info is added to the binary using both
- make configtxgen
- make release[-all]

Change-Id: Ifc881edc7dc4f0802d67403fb06eaec732ef355a
Signed-off-by: Nao Nishijima <nao.nishijima@hal.hitachi.com>

common/configtx/tool/configtxgen/main.go

@@ -22,11 +22,13 @@ import (
 	"flag"
 	"fmt"
 	"io/ioutil"
+	"os"
 
 	"github.com/hyperledger/fabric/bccsp/factory"
 	"github.com/hyperledger/fabric/common/config"
 	mspconfig "github.com/hyperledger/fabric/common/config/msp"
 	"github.com/hyperledger/fabric/common/configtx"
+	"github.com/hyperledger/fabric/common/configtx/tool/configtxgen/metadata"
 	genesisconfig "github.com/hyperledger/fabric/common/configtx/tool/localconfig"
 	"github.com/hyperledger/fabric/common/configtx/tool/provisional"
 	"github.com/hyperledger/fabric/common/flogging"
@@ -39,6 +41,8 @@ import (
 	logging "github.com/op/go-logging"
 )
 
+var exitCode = 0
+
 var logger = flogging.MustGetLogger("common/configtx/tool")
 
 func doOutputBlock(config *genesisconfig.Profile, channelID string, outputBlock string) error {
@@ -337,6 +341,8 @@ func main() {
 	flag.StringVar(&outputAnchorPeersUpdate, "outputAnchorPeersUpdate", "", "Creates an config update to update an anchor peer (works only with the default channel creation, and only for the first update)")
 	flag.StringVar(&asOrg, "asOrg", "", "Performs the config generation as a particular organization, only including values in the write set that org (likely) has privilege to set")
 
+	version := flag.Bool("version", false, "Show version information")
+
 	flag.Parse()
 
 	logging.SetLevel(logging.INFO, "")
@@ -345,6 +351,11 @@ func main() {
 	factory.InitFactories(nil)
 	config := genesisconfig.Load(profile)
 
+	if *version {
+		printVersion()
+		os.Exit(exitCode)
+	}
+
 	if outputBlock != "" {
 		if err := doOutputBlock(config, channelID, outputBlock); err != nil {
 			logger.Fatalf("Error on outputBlock: %s", err)
@@ -375,3 +386,7 @@ func main() {
 		}
 	}
 }
+
+func printVersion() {
+	fmt.Println(metadata.GetVersionInfo())
+}

common/configtx/tool/configtxgen/metadata/metadata.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2017 Hitachi America
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package metadata
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Package version
+var Version string
+
+// Program name
+const ProgramName = "configtxgen"
+
+func GetVersionInfo() string {
+	if Version == "" {
+		Version = "development build"
+	}
+
+	return fmt.Sprintf("%s:\n Version: %s\n Go version: %s\n OS/Arch: %s",
+		ProgramName, Version, runtime.Version(),
+		fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH))
+}

common/configtx/tool/configtxgen/metadata/metadata_test.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2017 Hitachi America
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package metadata_test
+
+import (
+	"fmt"
+	"runtime"
+	"testing"
+
+	"github.com/hyperledger/fabric/common/configtx/tool/configtxgen/metadata"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetVersionInfo(t *testing.T) {
+	testVersion := "TestVersion"
+	metadata.Version = testVersion
+
+	expected := fmt.Sprintf("%s:\n Version: %s\n Go version: %s\n OS/Arch: %s",
+		metadata.ProgramName, testVersion, runtime.Version(),
+		fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH))
+	assert.Equal(t, expected, metadata.GetVersionInfo())
+}