#!/bin/bash
 ##############################################################################
 #                       parabola-arm-imagebuilder                            #
 #                                                                            #
 #    Copyright (C) 2017  Andreas Grapentin                                   #
 #                                                                            #
 #    This program is free software: you can redistribute it and/or modify    #
 #    it under the terms of the GNU General Public License as published by    #
 #    the Free Software Foundation, either version 3 of the License, or       #
 #    (at your option) any later version.                                     #
 #                                                                            #
 #    This program is distributed in the hope that it will be useful,         #
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
 #    GNU General Public License for more details.                            #
 #                                                                            #
 #    You should have received a copy of the GNU General Public License       #
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.   #
 ##############################################################################

set -eu

die() { echo "$*" 1>&2 ; exit 1; }

# this script prepares an armv7h parabola image for use with start.sh

[ $(id -u) -ne 0 ] && die "must be root"
[ -z "${SUDO_USER:-}" ] && die "SUDO_USER not set"

export OUTFILE="${OUTFILE:-armv7h.img}"
export SIZE="${SIZE:-64G}"
export ARCHTARBALL="${ARCHTARBALL:-ArchLinuxARM-armv7-latest.tar.gz}"
export PARABOLATARBALL="${PARABOLATARBALL:-ParabolaARM-armv7-LATEST.tar.gz}"

export _builddir=build
mkdir -p "$_builddir"
chown $SUDO_USER "$_builddir"

export _outfile="$_builddir/$(basename "$OUTFILE")"

# prepare the empty image
./src/stage0.sh

if [ -n "${ARCHBOOTSTRAP:-}" ]; then
  # install a clean archlinux-arm system in the empty image
  wget -nc http://os.archlinuxarm.org/os/$ARCHTARBALL
  TARBALL="$ARCHTARBALL" ./src/stage1.sh

  # migrate the installed image to a clean parabola
  ./src/stage2.sh
else
  # install a clean parabola-arm system in the empty image
  wget -nc https://repo.parabola.nu/iso/arm/LATEST/$PARABOLATARBALL
  TARBALL="$PARABOLATARBALL" ./src/stage1.sh
fi

# setup package development environment
[ -n "${DEVSETUP:-}" ] && ./src/stage3.sh

# cleanup
chown $SUDO_USER $_outfile
mv -v "$_outfile" "$OUTFILE"
rm -rf "$_builddir"

echo "all done :)"