build system: Only setup git hooks if we're in a git checkout

A bit crude test, but before we would have _created_ .git
and confused later git presence tests.

Change-Id: Iec882d0e38ce1bd227cae8c1e541fb21be085290
Signed-off-by: Patrick Georgi <>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <>
diff --git a/ b/
index 951cfee..eb8b601 100644
--- a/
+++ b/
@@ -436,6 +436,7 @@
 	rm -f $$LINTLOG
+	[ -d .git ]
 	mkdir -p .git/hooks
 	for hook in commit-msg pre-commit ; do                       \
 		if [ util/gitconfig/$$hook -nt .git/hooks/$$hook -o  \