Revert "drop gzip support when compressing base.tar file. Always use …

…xz."

This reverts commit a419535.

bin/fai-make-nfsroot

@@ -156,6 +156,11 @@ deldir=$NFSROOT
 ROOTCMD="chroot $NFSROOT"
 export DEBIAN_FRONTEND=noninteractive
 
+usexz=0
+if [ -x "$(which xz)" ]; then
+    usexz=1
+fi
+
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 adjust_nfsroot() {
 
@@ -290,9 +295,17 @@ create_base() {
     call_debootstrap $FAI_DEBOOTSTRAP
     $ROOTCMD apt-get clean
     rm -f $NFSROOT/etc/resolv.conf $NFSROOT/etc/hostname $NFSROOT/etc/udev/rules.d/70-persistent-net.rules
-    echo "Creating base.tar.xz"
+    if [ $usexz -eq 0 ]; then
+        echo "Creating base.tar.gz"
+    else
+        echo "Creating base.tar.xz"
+    fi
     tar --one-file-system -C $NFSROOT -cf $NFSROOT/var/tmp/base.tar --exclude var/tmp/base.tar --exclude 'var/lib/apt/lists/*_*' .
-    nice xz -q $NFSROOT/var/tmp/base.tar &
+    if [ $usexz -eq 1 ]; then
+        nice xz -q $NFSROOT/var/tmp/base.tar &
+    else
+        nice gzip $NFSROOT/var/tmp/base.tar &
+    fi
 }
 # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 extract_base() {

debian/control

@@ -39,7 +39,7 @@ Description: Documentation for FAI
 
 Package: fai-server
 Architecture: all
-Depends: fai-client, debootstrap, xz-utils, ${misc:Depends}
+Depends: fai-client, debootstrap, ${misc:Depends}
 Recommends: nfs-kernel-server, isc-dhcp-server, tftpd-hpa | atftpd, openssh-server, openssh-client, openbsd-inetd | inet-superserver, libproc-daemon-perl
 Suggests: debmirror, reprepro, xorriso, binutils, grub, aptitude, perl-tk
 Description: Fully Automatic Installation server package