From cbe184ccdc4fbf713bae56ffa1a4a70c44b17753 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Thu, 24 Sep 2015 19:30:06 +0200
Subject: Fetch commit hash before nixos-rebuild

As described in #81, we should fetch the hash of the current HEAD before
starting the nixos-rebuild run, as if this run takes a lot of time, the
HEAD could have changed in between and so we would generate a tag on a
wrong commit.
---
 nix-script-switch.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/nix-script-switch.sh b/nix-script-switch.sh
index 6848a57..bd26c76 100755
--- a/nix-script-switch.sh
+++ b/nix-script-switch.sh
@@ -147,6 +147,9 @@ dbg "ARGS = $ARGS"
 
 [[ ! -d "$WD" ]] && stderr "No directory: $WD" && exit 1
 
+TAG_TARGET=$(__git "$WD" rev-parse HEAD)
+stdout "Tag in config will be generated at '$TAG_TARGET'"
+
 if [[ -z "$DONT_BUILD" ]]
 then
     __q="-Q"
@@ -181,7 +184,7 @@ then
     fi
 fi
 
-__git "$WD" tag $TAG_FLAGS "$TAG_NAME"
+__git "$WD" tag $TAG_FLAGS "$TAG_NAME" "$TAG_TARGET"
 
 if [[ $TAG_NIXPKGS -eq 1 ]]
 then
-- 
cgit v1.2.3