Change simple-cdd configuration to have full installer work offline

We move the default preseed to the kali profile so that the default
preseed can actually again enable simple-cdd-profiles that we need
because we want the other profiles to have their preseed and postinst
working (and they work through the script run when simple-cdd-profiles
is installed).

We add an offline profile that disables the network mirror (but not
the networking!) and we add a "postinst" script that is run in the
finish-install step to actually configure /etc/apt/sources.list that
is empty due to the preseed.

simple-cdd/profiles/default.preseed

@@ -1 +0,0 @@
-../../kali-config/common/includes.installer/preseed.cfg

simple-cdd/profiles/default.preseed

@@ -0,0 +1,3 @@
+# loads the simple-cdd-profiles udeb to which asks for which profiles to use,
+# load the debconf preseeding and queue packages for installation.
+d-i preseed/early_command string anna-install simple-cdd-profiles

simple-cdd/profiles/default.udebs

@@ -1,2 +1 @@
-# Disable default udebs from simple-cdd
-# We don't want simple-cdd-profiles, we want to use tasksel
+simple-cdd-profiles

simple-cdd/profiles/kali.postinst

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+if grep -q '^deb ' /etc/apt/sources.list; then
+    echo "INFO: sources.list is configured, everything is fine"
+    exit 0
+fi
+
+echo "INFO: sources.list is empty, setting up a default one for Kali"
+
+cat >/etc/apt/sources.list <<END
+# See https://www.kali.org/docs/general-use/kali-linux-sources-list-repositories/
+deb http://http.kali.org/kali kali-rolling main contrib non-free
+
+# Additional line for source packages
+# deb-src http://http.kali.org/kali kali-rolling main contrib non-free
+END
+apt-get update

simple-cdd/profiles/kali.preseed

@@ -0,0 +1 @@
+../../kali-config/common/includes.installer/preseed.cfg

simple-cdd/profiles/offline.preseed

@@ -0,0 +1,3 @@
+# Do not use a network mirror, full offline install
+d-i apt-setup/use_mirror boolean false
+d-i pkgsel/upgrade select none

simple-cdd/simple-cdd.conf

@@ -30,8 +30,17 @@
 # To automatically select profiles (must also be listed in profiles):
 # auto_profiles="foo bar baz"
 
+if [ "$DISKTYPE" = "DVD" ]; then
+    # Enable offline installation for full installer image
+    profiles="kali offline"
+    auto_profiles="kali offline"
+else
+    profiles="kali"
+    auto_profiles="kali"
+fi
+
 # To include profiles which only effect the CD build
-build_profiles="kali"
+# build_profiles="kali"
 
 # Mirror tools
 mirror_tools="reprepro download"