From 499b870a1a8e6688ff03b958709955075064b7e5 Mon Sep 17 00:00:00 2001
From: Zahary Karadjov <zahary@gmail.com>
Date: Thu, 30 Mar 2023 19:59:36 +0300
Subject: [PATCH] Allow the git revision to be specified with
 -d:git_revision_override=xxxxxx

---
 beacon_chain/version.nim | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/beacon_chain/version.nim b/beacon_chain/version.nim
index bc554754f..131f9b429 100644
--- a/beacon_chain/version.nim
+++ b/beacon_chain/version.nim
@@ -9,7 +9,7 @@
 
 {.push raises: [].}
 
-import strutils
+import std/[strutils, compilesettings]
 
 when not defined(nimscript):
   import times
@@ -22,7 +22,25 @@ const
 
   versionBlob* = "stateofus" # Single word - ends up in the default graffiti
 
-  gitRevision* = strip(staticExec("git rev-parse --short HEAD"))[0..5]
+  ## You can override this if you are building the
+  ## sources outside the git tree of Nimbus:
+  git_revision_override* {.strdefine.} =
+    when querySetting(SingleValueSetting.command) == "check":
+      # The staticExec call below returns an empty string
+      # when `nim check` is used and this leads to a faux
+      # compile-time error.
+      # We work-around the problem with this override and
+      # save some time in executing the external command.
+      "123456"
+    else:
+      ""
+
+  gitRevisionLong* = when git_revision_override.len == 0:
+    staticExec "git rev-parse --short HEAD"
+  else:
+    git_revision_override
+
+  gitRevision* = strip(gitRevisionLong)[0..5]
 
   nimFullBanner* = staticExec("nim --version")
   nimBanner* = staticExec("nim --version | grep Version")