sbrun: rename old build.log to build.log.old instead of deleting, sbodl: always cache file if it exists already

1 files changed, 2 insertions, 0 deletions

diff --git a/sbrun b/sbrun
index 5dd2222..1eeeb73 100755
--- a/sbrun
+++ b/sbrun
@@ -29,6 +29,8 @@ if [ "$(id -u)" != "0" ]; then
 		"$0" "$@"
 fi
 
+[ -e "$BUILDLOG" ] && mv "$BUILDLOG" "$BUILDLOG".old
+
 # Inherit MAKEFLAGS from env, if present.
 MAKEFLAGS="${MAKEFLAGS:-$DEFAULT_MAKEFLAGS}"