From 0b32492fd6133e2f650d10ad9c3629d863346a0d Mon Sep 17 00:00:00 2001
From: Eli Ribble <eli@gleipnir.technology>
Date: Mon, 20 Apr 2026 01:58:44 +0000
Subject: [PATCH] Add version information to build output

---
 default.nix | 15 +++++++++++++++
 version.go  |  6 ++++++
 2 files changed, 21 insertions(+)
 create mode 100644 version.go

diff --git a/default.nix b/default.nix
index 65e44f62..f8b6db60 100644
--- a/default.nix
+++ b/default.nix
@@ -1,6 +1,21 @@
 { pkgs ? import <nixpkgs> { }, proj ? pkgs.proj }:
 
 pkgs.buildGoModule rec {
+  # Try to get git info, fallback to version if .git doesn't exist
+  # Note: This runs at eval time, so it captures the version when you build
+  gitRevision = 
+    if builtins.pathExists ./.git 
+    then pkgs.lib.commitIdFromGitRepo ./.git 
+    else "unknown";
+  gitDescribe = builtins.readFile (pkgs.runCommand "git-describe" {} ''
+    ${pkgs.git}/bin/git -C ${./.} describe --always --dirty --tags 2>/dev/null > $out || echo "${version}" > $out
+  '');
+  ldflags = [
+    "-s"
+    "-w"
+    "-X main.Version=${version}"
+    "-X main.Commit=${gitRevision}"
+  ];
   meta = {
     description = "Nidus Sync";
     homepage = "https://github.com/Gleipnir-Technology/nidus-sync";
diff --git a/version.go b/version.go
new file mode 100644
index 00000000..e2f1bc4b
--- /dev/null
+++ b/version.go
@@ -0,0 +1,6 @@
+package main
+
+var (
+	Version = "dev"
+	Commit  = "none"
+)