From b64d900f0ffb56a176dcce62cb1363bcbdc8b4f0 Mon Sep 17 00:00:00 2001
From: David Anderson <danderson@tailscale.com>
Date: Fri, 10 Feb 2023 21:52:58 -0800
Subject: [PATCH] version: fix version output for "go run"

Before (note attempted use of absent date and commit hash):

"short": "1.37.0-dev",
"long": "1.37.0-dev-t",

After:

"short": "1.37.0-ERR-BuildInfo",
"long": "1.37.0-ERR-BuildInfo",

Signed-off-by: David Anderson <danderson@tailscale.com>
---
 version/version.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/version/version.go b/version/version.go
index 17a74a338..98e3892e6 100644
--- a/version/version.go
+++ b/version/version.go
@@ -134,6 +134,11 @@ var getEmbeddedInfo = lazy.SyncFunc(func() embeddedInfo {
 			ret.dirty = true
 		}
 	}
+	if ret.commit == "" || ret.commitDate == "" {
+		// Build info is present in the binary, but has no useful data. Act as
+		// if it's missing.
+		return embeddedInfo{}
+	}
 	return ret
 })