[PATCH 3/3] scripts/make-erofs.sh: Avoid unneeded calls to mkdir

[Demi Marie Obenour <demiobenour@gmail.com>]

Don't call it if the target directory already exists.

Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>
---
 scripts/make-erofs.sh | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/scripts/make-erofs.sh b/scripts/make-erofs.sh
index ac62a65f53e0b6417b164f475a537960fc5203bc..30b83b0b41cbe7bc4fd7786cfcdddcf10c78cc5a 100755
--- a/scripts/make-erofs.sh
+++ b/scripts/make-erofs.sh
@@ -44,10 +44,15 @@ while read -r arg1; do
 	# a subset of all paths, but this subset includes all of
 	# the ones passed in practice other than /.
 	case $arg2 in
-	(*/*) parent=${arg2%/*};;
-	(*) parent=.;;
+	(*/*)
+		# Make the parent directory if needed
+		parent=$root/${arg2%/*}
+		if [ ! -d "$parent" ]; then mkdir -p -- "$parent"; fi
+		;;
+	(*)
+		# Parent $root which definitely exists
+		;;
 	esac
-	mkdir -p -- "$root/$parent"
 	cp -RT -- "$arg1" "$root/$arg2"
 done
 

-- 
2.51.0