kbuild: fix delay in setlocalversion on readonly source

Do not update index on read only media. Idea published by Christian Kujau <[email protected]>. Cc: Nico Schottelius <[email protected]> Cc: Christian Kujau <[email protected]>
josf · Jun 14, 2009 · a2bb90a · a2bb90a
1 parent b2d8993
commit a2bb90a
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
@@ -39,8 +39,10 @@ if head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
 	        printf -- '-svn%s' "`git svn find-rev $head`"
 	fi
 
-	# Are there uncommitted changes?
-	git update-index --refresh --unmerged > /dev/null
+	# Update index only on r/w media
+	[ -w . ] && git update-index --refresh --unmerged > /dev/null
+
+	# Check for uncommitted changes
 	if git diff-index --name-only HEAD | grep -v "^scripts/package" \
 	    | read dummy; then
 		printf '%s' -dirty