Add version package

Author: MatteoPologruto

version/version.go

@@ -0,0 +1,39 @@
+package version
+
+import "fmt"
+
+var (
+	defaultVersionString = "0.0.0-git"
+	versionString        = ""
+	commit               = ""
+	date                 = ""
+)
+
+// Info is a struct that contains informations about the application
+type Info struct {
+	Application   string `json:"Application"`
+	VersionString string `json:"VersionString"`
+	Commit        string `json:"Commit"`
+	Date          string `json:"Date"`
+}
+
+// NewInfo returns a pointer to an updated Info struct
+func NewInfo(application string) *Info {
+	return &Info{
+		Application:   application,
+		VersionString: versionString,
+		Commit:        commit,
+		Date:          date,
+	}
+}
+
+func (i *Info) String() string {
+	return fmt.Sprintf("%[1]s Version: %[2]s Commit: %[3]s Date: %[4]s", i.Application, i.VersionString, i.Commit, i.Date)
+}
+
+//nolint:gochecknoinits
+func init() {
+	if versionString == "" {
+		versionString = defaultVersionString
+	}
+}