Improve build script

build.sh

@@ -1,3 +1,32 @@
-rm vbox.sys
+#!/bin/bash
+
+set -e
+
+IMG=kolibri.img
+DRV=vbox.sys
+
+check_utils()
+{
+    printf "%s: " $1
+    if command -v $1 &> /dev/null
+    then
+        echo -e "ok\r"
+    else
+        echo -e "no\r"
+    fi
+}
+
+check_utils fasm
+check_utils kpack
+check_utils mcopy
+
+if [ ! -e "$IMG" ]; then
+    echo "File $IMG does not exist"
+    exit
+fi
+
 fasm vbox.asm
-mcopy -D o -i kolibri.img vbox.sys ::drivers/vbox.sys
+kpack /nologo /driver $DRV
+mcopy -D o -i $IMG $DRV ::drivers/$DRV
+
+echo -e "Done.\r"