conditionalize use of git on executability of /usr/bin/git binary

diff --git a/debian/rules b/debian/rules
index f4e9f840fccd39f337e46cea40bc292e992b2d6e..f6efe9900a96b5487086e75c0222585086425367 100755 (executable)
--- a/debian/rules
+++ b/debian/rules
@@ -3,7 +3,7 @@
 
 export DH_VERBOSE=1
 PKG_VERSION := $(shell dpkg-parsechangelog | sed -ne 's/^Version: \(.*\)/\1/p')
-DEB_VERSION := $(shell -git describe | tr - +)
+DEB_VERSION := $(shell if [ -x /usr/bin/git ]; then git describe; else echo 0; fi | tr - +)
 
 # this target invoked by git-buildpackage using a clean hook, see .gbp.conf
 prebuild: