#!/bin/bash

set -e
set -o pipefail # Bashism

# You can put a local mirror here if you want
# (or you can set it in .mirror)
if [ -e .mirror ]; then
  kali_mirror=$(cat .mirror)
else
  kali_mirror=http://kali.download/kali
fi

### DO NOT EDIT THE REST OF THIS FILE ###

public_kali_mirror=http://http.kali.org/kali

# Detect target architecture and filter args
temp=""
arch=$(dpkg --print-architecture)
dist="kali-rolling"
lb_opts=""
while [ $# -gt 0 ]; do
     arg="$1"
  case "$arg" in
    -a|--arch|--architecture|--architectures)
    arch="$2"
    temp="$temp "'"'"$arg"'"'
    temp="$temp "'"'"$2"'"'
    shift
    ;;
  --distribution)
    dist="$2"
    shift
    ;;
  --variant)
    variant="$2"
    shift
    ;;
  -p|--proposed-updates)
    enable_pu="1"
    ;;
  --)
    # Skip the separator, it was added so that "lb config"
    # doesn't barf on our own options, but now we are
    # filtering them away assuming that the remaining ones
    # are intended for lb config !
    ;;
  *)
    temp="$temp "'"'"$arg"'"'
    ;;
  esac
  shift
done
eval set -- "$temp"

# Resolve release name
dist=$(wget -q -O- $kali_mirror/dists/$dist/Release | awk '/^Codename:/ {print $2}')
if [ -z "$dist" ]; then
  echo "ERROR: Build release could not be resolved"
  exit 1
fi

# live-build doesn't work if --parent-debian-distribution is unknown of
# debian-cd => we have to put a symlink so that it deals with kali like sid
if [ ! -e ${LIVE_BUILD:-/usr/share/live/build}/data/debian-cd/$dist ]; then
  if [ -w ${LIVE_BUILD:-/usr/share/live/build}/data/debian-cd ]; then
    ln -sf sid ${LIVE_BUILD:-/usr/share/live/build}/data/debian-cd/$dist
  else
    echo "ERROR: Run this first:"
    echo "ln -sf sid ${LIVE_BUILD:-/usr/share/live/build}/data/debian-cd/$dist"
    exit 1
  fi
fi

# Define options that vary across architectures
case "$arch" in
  amd64)
  lb_opts="$lb_opts --debian-installer live"
  ;;
  i386)
  lb_opts="$lb_opts --debian-installer live --linux-flavours 686-pae"
  ;;
  arm64)
  lb_opts="$lb_opts --bootloaders grub-efi --uefi-secure-boot disable"
  ;;
  armel|armhf)
  lb_opts="$lb_opts --binary-images hdd --binary-filesystem ext4 --chroot-filesystem none"
  ;;
  *)
  echo "WARNING: configuration not tested on arch $arch" >&2
  ;;
esac

# Define options that vary across distributions
case "$dist" in
  kali-last-snapshot)
  # We don't want kali-last-snapshot to end up in the image, it
  # should be replaced with kali-rolling
  lb_opts="$lb_opts --distribution-binary kali-rolling"
  lb_opts="$lb_opts --debootstrap-script /usr/share/debootstrap/scripts/kali-rolling"
  ;;
esac

# Setup configuration files from variant and options

# Drop all files that a former run might have put into place
for file in $(cd kali-config && find ./common ./variant-* -type f); do
  file=${file#./*/}
  rm -fv config/$file
done
rm -fv config/archives/kali-proposed-updates.list.*

# Copy over all files from official kali configuration
cp -rT kali-config/common config
[ ! -d kali-config/variant-$variant ] || cp -rTL kali-config/variant-$variant config

if [ -n "$enable_pu" ]; then
  mkdir -p config/archives
  echo "deb $kali_mirror $dist-proposed-updates main contrib non-free non-free-firmware" \
    > config/archives/kali-proposed-updates.list.chroot
  echo "deb $public_kali_mirror $dist-proposed-updates main contrib non-free non-free-firmware" \
    > config/archives/kali-proposed-updates.list.binary
fi

lb config noauto \
  --apt-indices=false \
  --distribution "$dist" \
  --debian-installer-distribution "$dist" \
  --archive-areas "main contrib non-free non-free-firmware" \
  --debootstrap-options "--keyring=/usr/share/keyrings/kali-archive-keyring.gpg" \
  --keyring-packages kali-archive-keyring \
  --updates false \
  --backports false \
  --source false \
  --firmware-binary true \
  --firmware-chroot true \
  --mirror-bootstrap "$kali_mirror" \
  --mirror-debian-installer "$kali_mirror" \
  --mirror-binary "$public_kali_mirror" \
  --iso-application "Kali Linux" \
  --iso-publisher "Kali" \
  --iso-volume "Kali Live" \
  --linux-packages linux-image \
  --memtest memtest86+ \
  --bootappend-live "boot=live components quiet splash noeject" \
  --bootappend-live-failsafe "boot=live components noeject memtest noapic noapm nodma nomce nolapic nomodeset nosmp nosplash vga=normal" \
  --bootappend-install "net.ifnames=0" \
  --security false \
  --win32-loader false \
  $lb_opts \
  "$@"
