From 6f76333567b19affdd122784d16b792485f0e812 Mon Sep 17 00:00:00 2001
From: "Niels G. W. Serup" <ngws@metanohi.name>
Date: Thu, 25 Aug 2016 02:36:24 +0200
Subject: [PATCH] Optimize script.

---
 scripts/resize-thumbnails.sh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/scripts/resize-thumbnails.sh b/scripts/resize-thumbnails.sh
index 4d8f705..23491f8 100755
--- a/scripts/resize-thumbnails.sh
+++ b/scripts/resize-thumbnails.sh
@@ -8,10 +8,13 @@ cd "$(dirname "$0")"
 
 cd ..
 
-rm -rf thumbnails-small
-mkdir thumbnails-small
+mkdir -p thumbnails-small
 
 cd thumbnails
 for x in *; do
-    convert $x -resize x"$thumbnail_height" ../thumbnails-small/$x
+    large=$x
+    small=../thumbnails-small/$x
+    if [ $large -nt $small ]; then
+	convert $x -resize x"$thumbnail_height" $small
+    fi
 done