# Initialize a debian chroot using debootstrap into the provided directory

# Parameters that I want on the command line:
# <arch> <suite> <repo>

[ "$(which debootstrap 2>&-)" ] || pebkac "j_init: debian: debootstrap not found"

: ${arch=${1}}
: ${suite=${2}}
: ${repo=${3}}
: ${include=bash-completion,curl,ed,file,less,locales,sudo,vim,whois}

[ "${arch}" ] || pebkac "Debian seed needs <arch> <suite> [repo]"

case "${arch}" in
x86|i386) arch=i386 ;;
amd64|x86_64|x64) arch=amd64 ;;
*) pebkac "Unsupported arch '${arch}'" ;;
esac

[ "${suite}" ] || pebkac "Debian seed needs <arch> <suite> [repo]"

[ "${repo}" ] || {
  if [ -f "${jseed}/debian/dists/${suite}/Release" ]
  then
    echo "Using local ${suite} pool for installation" >&2
    repo="file://${jseed}/debian"
  else
    case "${suite}" in
    buzz|rex|bo|hamm|slink|potato|woody|sarge|etch|lenny)
      repo="http://archive.debian.org/debian" ;;
    squeeze|wheezy|sid|*)
      repo="http://ftp.debian.org/debian" ;;
    esac
    echo "Using site '${repo}' for installation" >&2
  fi
}

keyring="${jseed}/debian/debian-archive-keyring.gpg"
[ -f "${keyring}" ] || unset keyring


[ ! -d "${jseed}/debian/pool" ] || {
  echo "Seeding deb archives from local pool" >&2
  mkdir -p "${jroot}/var/cache/apt/archives"
  find "${jseed}/debian/pool" -name '*.deb' -exec cp -l {} "${jroot}/var/cache/apt/archives" \;
}

cmd="debootstrap '--arch=${arch}' ${keyring+'--keyring=${jseed}/debian/debian-archive-keyring.gpg'} '--include=${include}' '${suite}' '${jroot}' '${repo}'"
echo "Executing: ${cmd}"
eval "${cmd}"

# Make sure locales are generated on first start
mkdir -p "${jroot}/etc/rcJ.d"
cat > "${jroot}/etc/rcJ.d/S00localegen" <<"EOF"
#!/bin/sh
/bin/sed -i '/en_US/s/^# //' /etc/locale.gen
/usr/sbin/locale-gen
/bin/rm -f "${0}"
EOF
chmod 755 "${jroot}/etc/rcJ.d/S00localegen"

echo "Adding user"
ed "${jroot}/etc/sudoers" <<"EOF"
H
$a
%sudo ALL=(ALL) NOPASSWD: ALL
.
w
EOF
user="${ORIG_USER}"
uid="$(id -u "${ORIG_USER}")"
[ "${user}" -a "${uid}" ] || { echo "Cannot add nonexistent user"; false; }
chroot "${jroot}" /usr/sbin/useradd -m -o -u "${uid}" -G root,sudo "${user}"
echo "Propagating password hash"
[ -f /etc/shadow ] && {
  hash="$(grep "^${user}:" /etc/shadow | cut -d: -f2)"
  [ "${hash}" ] && sed -i "s?^${user}:[^:]*:?${user}:${hash}:?" "${jroot}/etc/shadow"
}