#!/bin/sh

# Chromium launcher

# Authors:
#  Fabien Tassin <fta@sofaraway.org>
# License: GPLv2 or later

APPNAME=chromium

GDB=/usr/bin/gdb
LIBDIR=/usr/lib/$APPNAME
CHROMIUM_FLAGS=""

usage () {
  echo "$APPNAME [-h|--help] [-g|--debug] [--no-memcheck] [--temp-profile] [options] [URL]"
  echo
  echo "        -g or --debug              Start within $GDB"
  echo "        -h or --help               This help screen"
  echo "        --no-memcheck              Skip warning on low RAM devices"
  echo "        --temp-profile             Start with a new and temporary profile"
  echo "        --enable-remote-extensions Allow extensions from remote sites"
  echo
  echo " Other supported options are:"
  MANWIDTH=80 man chromium | sed -e '1,/OPTIONS/d; /ENVIRONMENT/,$d'
  echo " See 'man chromium' for more details"
}

display_msg() {
  if [ -z "$DISPLAY" ]; then
    echo "$@" 1>&2
  else
    zenoty --title=Chromium --text="$@"
  fi
}

display_qstn() {
  if [ -z "$DISPLAY" ]; then
    echo "$1"
  else
    zenoty --title=Chromium --text="$1" --question --ok-label="$2" \
      --cancel-label=Cancel --icon-name=dialog-warning
  fi
}

nosse3="\
The hardware on this system lacks support for the sse3 instruction set.
The upstream chromium project no longer supports this configuration.
For more information, please read and possibly provide input to their
bug tracking system at http://crbug.com/1123353"

noneon="\
The hardware on this system lacks support for NEON SIMD extensions.
We now require NEON or equivalent architecture extensions on ARM-based
machines. See https://lists.debian.org/debian-devel/2023/09/msg00175.html
for more information."

lowmem="\
It is not recommended to run Chromium on devices with less than 1GB of RAM."

lowmemok="Launch anyway"

case `uname -m` in
    i386|i586|i686|x86_64)
        # Check whether this system supports SSE3 (aka PNI)
        if ! grep -q 'sse3\|pni' /proc/cpuinfo; then
            display_msg "$nosse3"
            exit 1
        fi
        ;;
    armv?l)
        # Check whether this system supports NEON or ASIMD. Even though there
        # could be ARMv8 systems without ASIMD, we're far more likely to hit
        # v8 hardware emulating v7 systems with buggy VMs; so don't even
        # bother checking armv8l for now. If we do check in the future, they
        # advertise 'asimd' instead of 'neon'.
        if ! grep -q 'neon\|asimd' /proc/cpuinfo; then
            display_msg "$noneon"
            exit 1
        fi
        ;;
esac

# Clean up old crash reports (see https://bugs.debian.org/1015931)
# after 30 days.
test -d "$HOME/.config/chromium/Crash Reports/pending/" && \
  find "$HOME/.config/chromium/Crash Reports/pending/" -mtime +30 \
  \( -name "*.meta" -o -name "*.dmp" \) -exec rm \{\} \;

# Source additional settings
for file in /etc/chromium.d/*; do
  test $file = /etc/chromium.d/README || expr $file : .*\.dpkg > /dev/null || . $file
done

# Use the /usr/bin helper script for generated launchers
if test -z "$CHROME_WRAPPER"; then
    export CHROME_WRAPPER="/usr/bin/$APPNAME"
fi

# Set the correct file name for the desktop file
export CHROME_DESKTOP="chromium.desktop"

# Set CHROME_VERSION_EXTRA text, which is displayed in the About dialog
export CHROME_VERSION_EXTRA="built on Debian GNU/Linux 13 (trixie)"

want_debug=0
want_gles=1
want_memcheck=1
want_temp_profile=0
extra_args=0
while [ $# -gt 0 -a $# -ne $extra_args ]; do
  case "$1" in
    -h | --help | -help )
      usage
      exit 0 ;;
    -g | --debug )
      want_debug=1
      shift ;;
    --temp-profile )
      want_temp_profile=1
      shift ;;
    --no-gl-override)
      want_gles=0
      shift ;;
    --no-memcheck )
      want_memcheck=0
      shift ;;
    --enable-remote-extensions )
      CHROMIUM_FLAGS="$CHROMIUM_FLAGS --enable-remote-extensions"
      shift ;;
    -- ) # Stop option processing
      shift
      break ;;
    --* ) # Preserve (unknown to us) chromium flags at the end of the stack
      set -- "$@" "$1"
      extra_args=$((extra_args+1))
      shift ;;
    * )
      break ;;
  esac
done

if [ $want_memcheck -eq 1 ]; then
  memkb=$(awk '/^MemTotal/{print $2; exit}' /proc/meminfo)
  if [ $memkb -le 524288 ]; then
    if ! display_qstn "$lowmem" "$lowmemok"; then
	    exit 1
    fi
  fi
fi

if [ $want_gles -eq 1 ]; then
	CHROMIUM_FLAGS="$CHROMIUM_FLAGS --use-angle=gles"
fi

# Whitelist installed extensions that are specified via --load-extension
if [ -z "$(echo $CHROMIUM_FLAGS | grep \\-\\-enable-remote-extensions)" ]; then
  export CHROMIUM_FLAGS="$CHROMIUM_FLAGS --disable-background-networking"
  export CHROMIUM_FLAGS="$CHROMIUM_FLAGS --disable-extensions-except=$(echo $CHROMIUM_FLAGS | tr ' ' \\n | grep \\-\\-load-extension | cut -d= -f2 | tr \\n ,)"
fi

if [ $want_temp_profile -eq 1 ] ; then
  TEMP_PROFILE=`mktemp -d`
  echo "Using temporary profile: $TEMP_PROFILE"
  CHROMIUM_FLAGS="$CHROMIUM_FLAGS --user-data-dir=$TEMP_PROFILE"
fi

if [ $want_debug -eq 1 ] ; then
  if [ ! -x $GDB ] ; then
    echo "Sorry, can't find usable $GDB. Please install it."
    exit 1
  fi
  tmpfile=`mktemp /tmp/chromiumargs.XXXXXX` || { echo "Cannot create temporary file" >&2; exit 1; }
  trap " [ -f \"$tmpfile\" ] && /bin/rm -f -- \"$tmpfile\"" 0 1 2 3 13 15
  echo "set args $CHROMIUM_FLAGS --single-process ${1+"$@"}" > $tmpfile
  echo "# Env:"
  echo "#     LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
  echo "#                PATH=$PATH"
  echo "#            GTK_PATH=$GTK_PATH"
  echo "#      CHROMIUM_FLAGS=$CHROMIUM_FLAGS"
  echo "$GDB $LIBDIR/$APPNAME -x $tmpfile"
  $GDB "$LIBDIR/$APPNAME" -x $tmpfile
  if [ $want_temp_profile -eq 1 ] ; then
    rm -rf $TEMP_PROFILE
  fi
  exit $?
else
  if [ $want_temp_profile -eq 0 ] ; then
    exec $LIBDIR/$APPNAME $CHROMIUM_FLAGS "$@"
  else
    # we can't exec here as we need to clean-up the temporary profile
    $LIBDIR/$APPNAME $CHROMIUM_FLAGS "$@"
    rm -rf $TEMP_PROFILE
  fi
fi