[beast: 8/23] BUILD: detect git repo by inspecting HEAD:configure.ac

[Tim Janik <timj src gnome org>]

commit 4c63734248a4c05cef4d535a723753afb45bd3e4
Author: Tim Janik <timj gnu org>
Date:   Wed Oct 7 22:21:14 2015 +0200

    BUILD: detect git repo by inspecting HEAD:configure.ac
    
    Signed-off-by: Tim Janik <timj gnu org>

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a7f0f00..0ab7db0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -637,7 +637,7 @@ test x"$enable_devel_mode" = xyes || enable_devel_mode=no
 AM_CONDITIONAL(ENABLE_DEVEL_MODE, test x"$enable_devel_mode" = xyes)
 AC_MSG_RESULT([$enable_devel_mode])
 if test x"$enable_devel_mode" = xyes ; then
-  git cat-file commit af82337c966c1182e 2>&1 | fgrep -q bb4f6e48724a6731 || { # 0.8.0
+  git show HEAD:configure.ac 2>&1 | grep -q 'AC'_'INIT.*\bbeast\b.*,' || {
     AC_MSG_ERROR([development build rules require a beast.git repository])
   }
   MC_ASSERT_PROG(XMLLINT, xmllint, [See: http://xmlsoft.org/xmllint.html])