If configure is located at git repository, acquire branch and revision
of head to be printed at --version output.

Signed-off-by: Alon Bar-Lev <alon.bar...@gmail.com>
---
 configure.ac          |   11 +++++++++++
 src/openvpn/options.c |    3 +++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index 399b4e7..812d336 100644
--- a/configure.ac
+++ b/configure.ac
@@ -307,11 +307,13 @@ AC_ARG_VAR([ROUTE], [full path to route utility])
 AC_ARG_VAR([IPROUTE], [full path to ip utility])
 AC_ARG_VAR([NETSTAT], [path to netstat utility]) # tests
 AC_ARG_VAR([MAN2HTML], [path to man2html utility])
+AC_ARG_VAR([GIT], [path to git utility])
 AC_PATH_PROGS([IFCONFIG], [ifconfig],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
 AC_PATH_PROGS([ROUTE], [route],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
 AC_PATH_PROGS([IPROUTE], [ip],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
 AC_CHECK_PROGS([NETSTAT], [netstat], [netstat], 
[$PATH:/usr/local/sbin:/usr/sbin:/sbin:/etc]) # tests
 AC_CHECK_PROGS([MAN2HTML], [man2html])
+AC_CHECK_PROGS([GIT], [git]) # optional
 AC_DEFINE_UNQUOTED([IFCONFIG_PATH], ["$IFCONFIG"], [Path to ifconfig tool])
 AC_DEFINE_UNQUOTED([IPROUTE_PATH], ["$IPROUTE"], [Path to iproute tool])
 AC_DEFINE_UNQUOTED([ROUTE_PATH], ["$ROUTE"], [Path to route tool])
@@ -781,6 +783,15 @@ PKG_CHECK_MODULES(
        []
 )

+AC_MSG_CHECKING([git checkout])
+if test -n "${GIT}" -a -d "${srcdir}/.git"; then
+       PACKAGE_VERSION_EXTRA_GIT_REVISION="`GIT_DIR=\"${srcdir}/.git\" git 
rev-parse --symbolic-full-name HEAD`/`GIT_DIR=\"${srcdir}/.git\" git rev-parse 
--short HEAD`"
+       AC_MSG_RESULT([${PACKAGE_VERSION_EXTRA_GIT_REVISION}])
+       AC_DEFINE_UNQUOTED([PACKAGE_VERSION_EXTRA_GIT_REVISION], 
["${PACKAGE_VERSION_EXTRA_GIT_REVISION}"], [Git checkout revision])
+else
+       AC_MSG_RESULT([no])
+fi
+
 if test -n "${SP_PLATFORM_WINDOWS}"; then
        AC_DEFINE_UNQUOTED([PATH_SEPARATOR], ['\\\\'], [Path separator]) #"
        AC_DEFINE_UNQUOTED([PATH_SEPARATOR_STR], ["\\\\"], [Path separator]) #"
diff --git a/src/openvpn/options.c b/src/openvpn/options.c
index 019be57..c1aedfb 100644
--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -3430,6 +3430,9 @@ usage_version (void)
 #ifdef CONFIGURE_DEFINES
   msg (M_INFO|M_NOPREFIX, "Compile time defines: %s", CONFIGURE_DEFINES);
 #endif
+#ifdef PACKAGE_VERSION_EXTRA_GIT_REVISION
+  msg (M_INFO|M_NOPREFIX, "git revision: %s", 
PACKAGE_VERSION_EXTRA_GIT_REVISION);
+#endif
 #endif
   openvpn_exit (OPENVPN_EXIT_STATUS_USAGE); /* exit point */
 }
-- 
1.7.3.4


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