Move the version metadata to cfg packageThis way it can be used by multiple binaries.

pkg/cfg/config.go

@@ -1,6 +1,7 @@
 package cfg
 
 import (
+	"fmt"
 	"path"
 	"strings"
 
@@ -37,6 +38,23 @@ const (
 	OutSimple = "simple"
 )
 
+// Version metadata set by ldflags during the build.
+var (
+	version string
+	commit  string
+	date    string
+)
+
+// Version returns a string with version metadata: version number, git sha and build date.
+// It returns "development" if version variables are not set during the build.
+func Version() string {
+	if version == "" {
+		return "development"
+	}
+
+	return fmt.Sprintf("%s - revision %s built at %s", version, commit[:6], date)
+}
+
 // gitconfig provides methods for looking up configiration values inside .gitconfig file
 type gitconfig struct {
 	*config.Config