add watch arg to build-themes.sh

build-themes.sh

@@ -4,10 +4,17 @@ set -e
 sass_dir="sass"
 css_dir="data/static/css"
 
+if [[ "$1" == "--watch" && -n "$2" ]]; then
+  file="$2"
+  [[ $(basename "$file") = _* ]] && exit 1
+  sass --no-source-map --watch "$file" "$css_dir/theme-$(basename "$file" .scss).css"
+else
   #build default first
   sass --no-source-map "$sass_dir/_default.scss" "$css_dir/style.css"
 
+  rm -rf "$out_dir"/*.css 2>/dev/null
   for file in "$sass_dir"/*.scss; do
     [[ $(basename "$file") = _* ]] && continue
     sass --no-source-map "$file" "$css_dir/theme-$(basename "$file" .scss).css"
   done
+fi