[Devel] [PATCH rh7 1/2] Makefile: properly generate KERNELRELEASE value

[Konstantin Khorenko]

In case kernel is built from the tree (not with help of rpmbuild),
KERNELRELEASE env variable is not provided and should be
constructed from local git tags.

Generated KERNELRELEASE example:
"3.10.0-229.7.2.ovz.9.10-00001-g1da4621"

VZVERSION has been also aligned with format used in kernel.spec:
"9.10" instead of "ovz.9.10".

https://jira.sw.ru/browse/PSBM-34957

Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>
---
 Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 02d6a38..0e9306d 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,13 @@ RHEL_DRM_SUBLEVEL = 7
 VZVERSION = ovz.custom
 
 ifeq ($(VZVERSION), ovz.custom)
-  VZVERSION := $(shell if [ -d ".git" ]; then git describe | sed -r 's/^.*\.vz7\./ovz./'; fi)
+  VZVERSION := $(shell if [ -d ".git" ]; then \
+  		 git describe --abbrev=0 2>/dev/null | \
+  		 sed -r 's/^.*\.vz7\.//'; fi)
+
+  ifeq ($(EXTRAVERSION),)
+    EXTRAVERSION := -$(RHEL_RELEASE).ovz.$(VZVERSION)
+  endif
 endif
 
 # *DOCUMENTATION*
-- 
1.8.3.1