update make_style.sh

make_style.sh

@@ -1,14 +1,27 @@
 #!/bin/sh
-cd "$(dirname "$0")" || exit
+if ! [ -x "$(command -v sass)" ]; then
+  echo 'Error: sass is not installed.' >&2
+  exit 1
+fi
+
+if ! [ -x "$(command -v postcss)" ]; then
+  echo 'Error: postcss is not installed.' >&2
+  exit 1
+fi
 
-node scripts/check-package-installed.js postcss sass autoprefixer || exit
+if ! [ -x "$(command -v autoprefixer)" ]; then
+  echo 'Error: autoprefixer is not installed.' >&2
+  exit 1
+fi
+
+cd "$(dirname "$0")" || exit
 
 build_style() {
   echo "Creating $1 style..."
   cp resources/vars-$1.scss resources/vars.scss
-  npx sass resources:sass_processed
-  npx postcss sass_processed/style.css sass_processed/martor-description.css sass_processed/select2-dmoj.css --verbose --use autoprefixer -d $2
+  sass resources:sass_processed
+  postcss sass_processed/style.css sass_processed/martor-description.css sass_processed/select2-dmoj.css --verbose --use autoprefixer -d $2
 }
 
 build_style 'default' 'resources'
-build_style 'dark' 'resources/dark'
+build_style 'dark' 'resources/dark'