From 86cd055477ab91a6134a0bc437c3f6e24e0ac602 Mon Sep 17 00:00:00 2001
From: Eduard Bachmakov <e.bachmakov@gmail.com>
Date: Sat, 27 Dec 2014 21:43:04 +0100
Subject: [PATCH] Add option to display git revision to nixos-version

Example use case: git checkout `nixos-version --hash`
---
 nixos/modules/installer/tools/nixos-version.sh | 10 +++++++++-
 nixos/modules/installer/tools/tools.nix        |  2 +-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/installer/tools/nixos-version.sh b/nixos/modules/installer/tools/nixos-version.sh
index 5dbf277fe4c4..51aa2dd82321 100644
--- a/nixos/modules/installer/tools/nixos-version.sh
+++ b/nixos/modules/installer/tools/nixos-version.sh
@@ -1,2 +1,10 @@
 #! @shell@
-echo "@nixosVersion@ (@nixosCodeName@)"
+
+case "$1" in
+  --hash|--revision)
+    echo "@nixosRevision@"
+    ;;
+  *)
+    echo "@nixosVersion@ (@nixosCodeName@)"
+    ;;
+esac
diff --git a/nixos/modules/installer/tools/tools.nix b/nixos/modules/installer/tools/tools.nix
index 2c796250a982..2ba1dc0841e2 100644
--- a/nixos/modules/installer/tools/tools.nix
+++ b/nixos/modules/installer/tools/tools.nix
@@ -50,7 +50,7 @@ let
   nixos-version = makeProg {
     name = "nixos-version";
     src = ./nixos-version.sh;
-    inherit (config.system) nixosVersion nixosCodeName;
+    inherit (config.system) nixosVersion nixosCodeName nixosRevision;
   };
 
   /*