[FAB-10212] Fix version info for idemixgen

idemixgen was using the orderer metadata so
added a metadata sub package

Change-Id: Ibdbff33ac020f62a5d4338030cf6b730430cd5ad
Signed-off-by: Gari Singh <gari.r.singh@gmail.com>

Author: mastersingh24

common/tools/idemixgen/idemixgen.go

@@ -24,9 +24,9 @@ import (
 
 	"github.com/golang/protobuf/proto"
 	"github.com/hyperledger/fabric/common/tools/idemixgen/idemixca"
+	"github.com/hyperledger/fabric/common/tools/idemixgen/metadata"
 	"github.com/hyperledger/fabric/idemix"
 	"github.com/hyperledger/fabric/msp"
-	"github.com/hyperledger/fabric/orderer/common/metadata"
 	"github.com/pkg/errors"
 	"gopkg.in/alecthomas/kingpin.v2"
 )

common/tools/idemixgen/metadata/metadata.go

@@ -0,0 +1,28 @@
+/*
+Copyright IBM Corp. All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package metadata
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Package version
+var Version string
+
+// Program name
+const ProgramName = "idemixgen"
+
+func GetVersionInfo() string {
+	if Version == "" {
+		Version = "1.2.0-dev"
+	}
+
+	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/tools/idemixgen/metadata/metadata_test.go

@@ -0,0 +1,26 @@
+/*
+Copyright IBM Corp. All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0
+*/
+
+package metadata_test
+
+import (
+	"fmt"
+	"runtime"
+	"testing"
+
+	"github.com/hyperledger/fabric/common/tools/idemixgen/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())
+}