add version info in output

main.go

@@ -21,8 +21,13 @@ type Output struct {
 	CertLoaded  bool
 	Results     string
 	Groups      string
+	Version     string
 }
 
+// For build numbers, from https://blog.kowalczyk.info/article/vEja/embedding-build-number-in-go-executable.html
+var sha1ver string   // sha1 revision used to build the program
+var buildTime string // when the executable was built
+
 func GetFilePath(path string) string {
 	// Check for empty filename
 	if len(path) == 0 {
@@ -121,6 +126,8 @@ func GetGroupsOfUser(username string, baseDN string, conn *ldap.Conn) ([]string,
 	return groups, nil
 }
 
+// Some good ideas at https://gist.github.com/tboerger/4840e1b5464fc26fbb165b168be23345
+
 func main() {
 	var output Output
 
@@ -133,6 +140,7 @@ func main() {
 	flag.Parse()
 
 	output.Server = *server
+	output.Version = fmt.Sprintf("Built on %s from sha1 %s\n", buildTime, sha1ver)
 
 	// Get a copy of the system defined CA's
 	system, err := x509.SystemCertPool()