base-strap.in

#!/bin/bash

#
# Assumptions:
#  1) User has partitioned, formatted, and mounted partitions on /mnt
#  2) Network is functional
#  3) Arguments passed to the script are valid kepler targets
#  4) A valid mirror appears in /etc/kepler.d/mirrorlist
#

shopt -s extglob

m4_include(common)

hostcache=0
copykeyring=1
initkeyring=0
copymirrorlist=1
kepler_args=()
keplermode=-Sy
setup=chroot_setup
unshare=0
copyconf=0
kepler_config=/etc/kepler.conf

usage() {
  cat <<EOF
usage: ${0##*/} [options] root [packages...]

  Options:
    -C <config>    Use an alternate config file for kepler
    -c             Use the package cache on the host, rather than the target
    -D             Skip kepler dependency checks
    -G             Avoid copying the host's kepler keyring to the target
    -i             Prompt for package confirmation when needed (run interactively)
    -K             Initialize an empty kepler keyring in the target (implies '-G')
    -M             Avoid copying the host's mirrorlist to the target
    -N             Run in unshare mode as a regular user
    -P             Copy the host's kepler config to the target
    -U             Use kepler -U to install packages

    -h             Print this help message

base-strap installs packages to the specified new root directory. If no packages
are given, base-strap defaults to the "base" group.

EOF
}

if [[ -z $1 || $1 = @(-h|--help) ]]; then
  usage
  exit $(( $# ? 0 : 1 ))
fi

while getopts ':C:cDGiKMNPU' flag; do
  case $flag in
    C)
      kepler_config=$OPTARG
      ;;
    D)
      kepler_args+=(-dd)
      ;;
    c)
      hostcache=1
      ;;
    i)
      interactive=1
      ;;
    G)
      copykeyring=0
      ;;
    K)
      initkeyring=1
      ;;
    M)
      copymirrorlist=0
      ;;
    N)
      setup=unshare_setup
      unshare=1
      ;;
    P)
      copyconf=1
      ;;
    U)
      keplermode=-U
      ;;
    :)
      die '%s: option requires an argument -- '\''%s'\' "${0##*/}" "$OPTARG"
      ;;
    ?)
      die '%s: invalid option -- '\''%s'\' "${0##*/}" "$OPTARG"
      ;;
  esac
done
shift $(( OPTIND - 1 ))

(( $# )) || die "No root directory specified"
newroot=$1; shift
kepler_args+=("$keplermode" "${@:-base}" --config="$kepler_config")

if (( ! hostcache )); then
  kepler_args+=(--cachedir="$newroot/var/cache/kepler/pkg")
fi

if (( ! interactive )); then
  kepler_args+=(--noconfirm)
fi

[[ -d $newroot ]] || die "%s is not a directory" "$newroot"

base-strap() {
  (( EUID == 0 )) || die 'This script must be run with root privileges'

  # create obligatory directories
  msg 'Creating install root at %s' "$newroot"
  mkdir -m 0755 -p "$newroot"/var/{cache/kepler/pkg,lib/kepler,log} "$newroot"/{dev,run,etc/kepler.d}
  mkdir -m 1777 -p "$newroot"/tmp
  mkdir -m 0555 -p "$newroot"/{sys,proc}

  # mount API filesystems
  $setup "$newroot" || die "failed to setup chroot %s" "$newroot"

  if [[ ! -d $newroot/etc/kepler.d/gnupg ]]; then
    if (( initkeyring )); then
      kepler-key --gpgdir "$newroot"/etc/kepler.d/gnupg --init
    elif (( copykeyring )) && [[ -d /etc/kepler.d/gnupg ]]; then
      # if there's a keyring on the host, copy it into the new root
      cp -a --no-preserve=ownership /etc/kepler.d/gnupg "$newroot/etc/kepler.d/"
    fi
  fi

  msg 'Installing packages to %s' "$newroot"
  if ! $pid_unshare kepler -r "$newroot" "${kepler_args[@]}"; then
    die 'Failed to install packages to new root'
  fi

  if (( copymirrorlist )); then
    # install the host's mirrorlist onto the new root
    cp -a /etc/kepler.d/mirrorlist "$newroot/etc/kepler.d/"
  fi

  if (( copyconf )); then
    cp -a "$kepler_config" "$newroot/etc/kepler.conf"
  fi
}

if (( unshare )); then
  $mount_unshare bash -c "$(declare_all); base-strap"
else
  base-strap
fi

# vim: et ts=2 sw=2 ft=sh: