Version is now based on MD5SUM of its binary

hash-binary.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"os"
+
+	"crypto/md5"
+)
+
+// mustHashBinarySelf computes MD5SUM of a binary file on disk
+func hashBinary(progName string) (string, error) {
+	h := md5.New()
+
+	file, err := os.Open(progName) // For read access.
+	if err != nil {
+		return "", err
+	}
+
+	io.Copy(h, file)
+	return fmt.Sprintf("%x", h.Sum(nil)), nil
+}
+
+// mustHashBinarySelf computes MD5SUM of its binary file on disk
+func mustHashBinarySelf() string {
+	hash, _ := hashBinary(os.Args[0])
+	return hash
+}