#!/bin/bash
#===============================================================================
#
# DIRECTORY:
#   /home/*/.local/share/nautilus/scripts/06-Qemu/
# OR
#   /home/*/.gnome2/nautilus-sctipts/06-Qemu/ (deprecated)
#
# FILE:
#   05a-RPi-cli
#
# USAGE:
#   Right klick on a RAW image (.dd) and
#   choose this nautilus script from the context menu.
#
# OPTIONS:
#   none
#
# DESCRIPTION:
#   Boot up an emulated Raspberry Pi image with command line but more RAM.
#
# REQUIREMENTS:
#   bash, zenity...
#
# BUGS:
#   ---
#
# NOTES:
#   Tested on
#   - Debian 8+
#   - Arch Linux
#
# AUTHOR:
#   Patrick Neumann, patrick@neumannsland.de
#
# COMPANY:
#   (privately)
#
# VERSION:
#   0.9 (beta)
#
# LINK TO THE MOST CURRENT VERSION:
#   https://...
#
# CREATED:
#   01.12.2020
#
# COPYRIGHT (C):
#   2015-2020 - Patrick Neumann
#
# LICENSE:
#   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.
#
# WARRANTY:
#   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/>.
#
# TODO:
#   ---
#
# HISTORY:
#   0.9 - Patrick Neumann - Initial (public) release
#
#===============================================================================

#-------------------------------------------------------------------------------
# Additional supported Distribution(s) (add before Library!).
#-------------------------------------------------------------------------------
SUPPORTED_OSR="arch"

#-------------------------------------------------------------------------------
# Check for library (casualscripter_nautilus-scripts_functions.sh).
#-------------------------------------------------------------------------------
readonly LIBRARY="${0%/*/*}/.casualscripter_nautilus-scripts_functions.sh"
if [ ! -f "${LIBRARY}" ] ; then
  zenity --error \
         --text \
         "ERROR: casualscripter_nautilus-scripts_functions.sh MISSING!"
  exit 1
fi

source "${LIBRARY}"

#-------------------------------------------------------------------------------
# Checks (see library "casualscripter_nautilus-scripts_functions.sh").
#-------------------------------------------------------------------------------
check_dep "${LS_BIN}" "coreutils"
check_dep "${GREP_BIN}" "grep"
check_dep "${AWK_BIN}" "gawk"
check_dep "${TR_BIN}" "coreutils"
check_dep "${FCAT_BIN}" "sleuthkit"
check_dep "${SED_BIN}" "sed"
check_dep "${GTERMINAL_BIN}" "gnome-terminal"
check_dep "${QEMUSYSARM_BIN}" "qemu-arch-extra"

check_ext "${SOURCE}" "dd"

#-------------------------------------------------------------------------------
# Avoid unintended changes to the Image.
#-------------------------------------------------------------------------------
check_if_pwd_is_used_as_mountpoint

#-------------------------------------------------------------------------------
# Check, if source is not mounted.
#-------------------------------------------------------------------------------
check_if_source_is_not_mounted

#-------------------------------------------------------------------------------
# Choose kernel:
#-------------------------------------------------------------------------------
readonly DIRECTORY="${HOME}/RPi"
readonly VERSIONS="$( ${LS_BIN} -1 "${DIRECTORY}" \
                             | ${GREP_BIN} "^[[:digit:]]" \
                             | ${AWK_BIN} 'NR == 1 { print "TRUE", $0; }; NR > 1 { print "FALSE", $0; }' \
                             | ${TR_BIN} "\n" " " )"
readonly VERSION="$( ${ZENITY_BIN} --list \
                                   --text "Choose kernel version:" \
                                   --radiolist \
                                   --width=180 \
                                   --height=400 \
                                   --column "Pick" \
                                   --column "Option" ${VERSIONS} )"

if [ -z "${VERSION}" ] ; then
  ${ZENITY_BIN} --error \
                --text \
                "ERROR: no version choosen!"
  exit 1
fi

readonly KERNELS="$( ${LS_BIN} -1 "${DIRECTORY}/${VERSION}" \
                             | ${AWK_BIN} 'NR == 1 { print "TRUE", $0; }; NR > 1 { print "FALSE", $0; }' \
                             | ${TR_BIN} "\n" " " )"
readonly KERNEL="$( ${ZENITY_BIN} --list \
                                  --text "Choose kernel arch:" \
                                  --radiolist \
                                  --width=240 \
                                  --height=240 \
                                  --column "Pick" \
                                  --column "Option" ${KERNELS} )"

if [ -z "${KERNEL}" ] ; then
  ${ZENITY_BIN} --error \
                --text \
                "ERROR: no arch choosen!"
  exit 1
fi

# allways offset 8192 or has it to be more generic!?
readonly CMDLINE="$( ${FCAT_BIN} -o 8192 "/cmdline.txt" "${SOURCE}" \
                     | ${SED_BIN} 's/tty1/ttyAMA0/' )"

#-------------------------------------------------------------------------------
# ...
#-------------------------------------------------------------------------------
${GTERMINAL_BIN} --execute \
  ${QEMUSYSARM_BIN} \
    -kernel "${DIRECTORY}/${VERSION}/${KERNEL}" \
    -append "${CMDLINE}" \
    -m 1024 \
    -M virt \
    -cpu cortex-a7 \
    -drive file="${SOURCE}",format=raw,if=none,id=hd-root \
    -device virtio-blk-device,drive=hd-root \
    -netdev user,id=mynet \
    -device virtio-net-device,netdev=mynet \
    -object rng-random,filename=/dev/urandom,id=rng0 \
    -device virtio-rng-pci,rng=rng0 \
    -nographic \
    -no-reboot

exit 0