fixed timezone, firefox in french, optional grub and isolinux folders

prepare.sh

@@ -2,7 +2,7 @@
 set -eE
 
 function clean() {
-    echo "==== CLEAN ERR ===="
+    echo "==== CLEAN ===="
     sudo umount "$WORKDIR/squashfs" || :
     sudo umount /tmp/livecd || :
 }
@@ -59,12 +59,16 @@ echo "==== Install extensions ===="
 sudo cp "$SPATH/firefox/extensions/"* "$WORKDIR/custom/usr/lib/firefox/distribution/extensions/"
 
 echo "==== Mod ISOLINUX (BIOS) AND GRUB (EFI) ===="
+if [[ -d isolinux ]]; then
     # isolinux
     chmod -R +w "$WORKDIR/cd/isolinux"
     cp isolinux/* "$WORKDIR/cd/isolinux/"
+fi
+if [[ -d grub ]]; then
     # grub
     chmod -R +w "$WORKDIR/cd/boot/grub"
     cp grub/* "$WORKDIR/cd/boot/grub/"
+fi
 
 # setup iso
 echo "==== Setup ISO ===="

tasks.sh

@@ -7,11 +7,13 @@ mount -t devpts none /dev/pts/
 
 # set timezone
 echo "Europe/Paris" > /etc/timezone
-ln -sf /usr/share/zoneinfo/$(cat /etc/timezone /etc/localtime
+ln -sf /usr/share/zoneinfo/$(cat /etc/timezone) /etc/localtime
 dpkg-reconfigure -f noninteractive tzdata
 
 sudo apt-get update
 
+sudo apt-get upgrade -y
+
 # install lang pack
 lang=fr
 for l in $(cat /usr/share/linuxmint/mintlocale/language_packs); do