From cb8b5e77bb0c0f9f41f760184f428e3cc14d1dae Mon Sep 17 00:00:00 2001
From: Joe Higton <draxil@gmail.com>
Date: Tue, 2 Aug 2022 08:50:01 +0100
Subject: [PATCH] [main] read version info from the binary when not set

---
 json2nd.go | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/json2nd.go b/json2nd.go
index 1217e70..abd83fa 100644
--- a/json2nd.go
+++ b/json2nd.go
@@ -4,9 +4,10 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"runtime/debug"
 )
 
-var version = "dev"
+var version = ""
 
 func main() {
 
@@ -35,7 +36,17 @@ func flags() (tolerant bool, path string, args []string) {
 	args = flag.Args()
 
 	if *showVersion {
-		fmt.Println(version)
+		if version != "" {
+			fmt.Println(version)
+		} else {
+			info, ok := debug.ReadBuildInfo()
+			if ok {
+				fmt.Println(info.Main.Version)
+			} else {
+				fmt.Println("don't know")
+			}
+		}
+
 		os.Exit(0)
 	}