1 files changed, 85 insertions, 0 deletions
diff --git a/internal/version/version.go b/internal/version/version.go
new file mode 100644
index 0000000..7148019
--- /dev/null
+++ b/internal/version/version.go
@@ -0,0 +1,85 @@
+//  Copyright (c) 2019 Cisco and/or its affiliates.
+//
+//  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 version keeps track of versioning info for GoVPP.
+package version
+
+import (
+	"fmt"
+	"runtime"
+	"strconv"
+	"time"
+)
+
+const (
+	Major      = 0
+	Minor      = 4
+	Patch      = 0
+	PreRelease = "dev"
+)
+
+// String formats the version string using semver format.
+func String() string {
+	v := fmt.Sprintf("v%d.%d.%d", Major, Minor, Patch)
+	if PreRelease != "" {
+		v += "-" + PreRelease
+	}
+	return v
+}
+
+// Following variables should normally be updated via `-ldflags "-X ..."`.
+// However, the version string is hard-coded to ensure it is always included
+// even with bare go build/install.
+var (
+	name       = "govpp"
+	version    = "v0.4.0-dev"
+	commit     = "unknown"
+	branch     = "HEAD"
+	buildStamp = ""
+	buildUser  = ""
+	buildHost  = ""
+
+	buildDate time.Time
+)
+
+func init() {
+	buildstampInt64, _ := strconv.ParseInt(buildStamp, 10, 64)
+	if buildstampInt64 == 0 {
+		buildstampInt64 = time.Now().Unix()
+	}
+	buildDate = time.Unix(buildstampInt64, 0)
+}
+
+func Version() string {
+	return version
+}
+
+func Info() string {
+	return fmt.Sprintf(`%s %s`, name, version)
+}
+
+func Verbose() string {
+	return fmt.Sprintf(`%s
+  Version:      %s
+  Branch:   	%s
+  Revision: 	%s
+  Built by:  	%s@%s 
+  Build date:	%s
+  Go runtime:	%s (%s/%s)`,
+		name,
+		version, branch, commit,
+		buildUser, buildHost, buildDate.Format(time.UnixDate),
+		runtime.Version(), runtime.GOOS, runtime.GOARCH,
+	)
+}