add version info

utils/version.go

@@ -0,0 +1,35 @@
+package utils
+
+var (
+	version     = "0.9.0-dev"
+	commit      = ""
+	date        = ""
+	versionInfo VersionInfo
+)
+
+// VersionInfo defines version details
+type VersionInfo struct {
+	Version    string `json:"version"`
+	BuildDate  string `json:"build_date"`
+	CommitHash string `json:"commit_hash"`
+}
+
+// GetVersionAsString returns the string representation of the VersionInfo struct
+func (v *VersionInfo) GetVersionAsString() string {
+	versionString := v.Version
+	if len(v.CommitHash) > 0 {
+		versionString += "-" + v.CommitHash
+	}
+	if len(v.BuildDate) > 0 {
+		versionString += "-" + v.BuildDate
+	}
+	return versionString
+}
+
+func init() {
+	versionInfo = VersionInfo{
+		Version:    version,
+		CommitHash: commit,
+		BuildDate:  date,
+	}
+}