run_RISC_OS

#!/bin/bash
#
# Copyright (c) 2018, Timothy Baldwin
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

set -e

: ${RISC_OS__OpenTerm:=0}

term=
choose_term() {
  for term in xterm x-terminal-emulator konsole gnome-terminal mate-terminal
  do
    if command -v $term 2>/dev/null; then
      return 0
    fi
  done
  return 1
}

readonly() {
  RISC_OS__BWRAP_EXTRA="$RISC_OS__BWRAP_EXTRA --ro-bind ${1@Q} ${1@Q}"
}

readwrite() {
  RISC_OS__BWRAP_EXTRA="$RISC_OS__BWRAP_EXTRA --bind ${1@Q} ${1@Q}"
}

init_make_opts() {
  make_opts=( -f Unix/LinuxSupport/common.mk script-all )
  if [[ "$RISC_OS__INSECURE" == "YES" ]]; then
    make_opts+=( INSECURE=YES )
  else
    make_opts+=( Built/seccomp- )
  fi
}

gui_make_opts() {
  eval "gui=( ${RISC_OS__GUI:=Built/sdl} )"
  if [[ $gui == Built/sdl || $gui == Built/opengl ]]; then
    make_opts+=( "$gui" )
  fi
}

run_make() {
  mkdir -p Built
  if [[ $RISC_OS__OpenTerm -gt 0 ]]; then
    (
      flock --close Built make -j$(getconf _NPROCESSORS_ONLN) "${make_opts[@]}" || { sleep 3600; false; }
    ) 2>&1 | (
      if ! Built/wait_stdin; then
        choose_term
        ( $term -e bash -c "cat </proc/$BASHPID/fd/0; sleep 6" ) &
      fi
    )
  else
    flock --close Built make -j$(getconf _NPROCESSORS_ONLN) "${make_opts[@]}"
  fi
}

if [[ -r config ]]; then
  . config
fi

if [[ $RISC_OS__OpenTerm -gt 0 ]]; then
  exec >/dev/null </dev/null
  exec 2> >(cat >&2)
fi

init_make_opts
gui_make_opts
run_make

if [[ ! -e 'HardDisc4/!Boot/Loader/CMOS' ]]; then (
  shopt -s nullglob
  mkdir -p 'HardDisc4/!Boot/Loader'
  nvram=('HardDisc4/!Boot/CMOS',??? 'HardDisc4/!Boot/CMOS')
  ln "$nvram" 'HardDisc4/!Boot/Loader/CMOS'
) fi

: ${RISC_OS_Alias_IXFSBoot:='/<IXFS$HardDisc4>.!Boot'}
export RISC_OS_Alias_IXFSBoot
eval "bwrap_extra=($RISC_OS__BWRAP_EXTRA)"

for i in /usr /sbin /bin /lib* /etc/alternatives /etc/manpath.config; do
  if [[ -L "$i" ]]; then
    bwrap_extra+=(--symlink "$(readlink "$i")" "$i")
  else
    bwrap_extra+=(--ro-bind-try "$i" "$i")
  fi
done

if [[ "$RISC_OS__INSECURE" == "YES" ]]; then
  RISC_OS_IXFS_HardDisc4='IXFS:$.dev.fd.5.HardDisc4' exec $RISC_OS__GUI Built/wrapper --handle-reboots -- Built/qemu-link Unix/RISCOS.IMG --nvram 'HardDisc4/!Boot/Loader/CMOS' 5<.
else
  RISC_OS_IXFS_HardDisc4='IXFS:$.HardDisc4' exec $RISC_OS__GUI Built/wrapper --network --handle-reboots \
  bwrap --seccomp -- --unshare-all --die-with-parent --cap-drop ALL --tmpfs / --proc /proc --dev /dev \
  --ro-bind Built /Built \
  --ro-bind Unix/RISCOS.IMG /RISC_OS \
  --bind HardDisc4 /HardDisc4 \
  "${bwrap_extra[@]}" --chdir /bin \
  --tmpfs /tmp --tmpfs /run \
  --remount-ro / \
  /Built/qemu-link /RISC_OS --nvram '/HardDisc4/!Boot/Loader/CMOS'
fi