desktop-exports

###############################################
# Launcher common exports for any desktop app #
###############################################

function prepend_dir() {
  local var="$1"
  local dir="$2"
  if [ -d "$dir" ]; then
    eval "export $var=\"\$dir\${$var:+:\$$var}\""
  fi
}

function append_dir() {
  local var="$1"
  local dir="$2"
  if [ -d "$dir" ]; then
    eval "export $var=\"\${$var:+\$$var:}\$dir\""
  fi
}

WITH_RUNTIME=no
if [ -z "$RUNTIME" ]; then
  RUNTIME=$SNAP
else
  # add general paths not added by snapcraft due to runtime snap
  append_dir LD_LIBRARY_PATH $RUNTIME/lib/$ARCH
  append_dir LD_LIBRARY_PATH $RUNTIME/usr/lib/$ARCH
  append_dir PATH $RUNTIME/usr/bin
  WITH_RUNTIME=yes
fi

# XKB config
export XKB_CONFIG_ROOT=$RUNTIME/usr/share/X11/xkb

# Give XOpenIM a chance to locate locale data.
# This is required for text input to work in SDL2 games.
export XLOCALEDIR=$RUNTIME/usr/share/X11/locale

# Mesa Libs for OpenGL support
append_dir LD_LIBRARY_PATH $RUNTIME/usr/lib/$ARCH/mesa
append_dir LD_LIBRARY_PATH $RUNTIME/usr/lib/$ARCH/mesa-egl

# Tell libGL where to find the drivers
export LIBGL_DRIVERS_PATH=$RUNTIME/usr/lib/$ARCH/dri
append_dir LD_LIBRARY_PATH $LIBGL_DRIVERS_PATH

# Workaround in snapd for proprietary nVidia drivers mounts the drivers in
# /var/lib/snapd/lib/gl that needs to be in LD_LIBRARY_PATH
# Without that OpenGL using apps do not work with the nVidia drivers.
# Ref.: https://bugs.launchpad.net/snappy/+bug/1588192
append_dir LD_LIBRARY_PATH /var/lib/snapd/lib/gl

# Unity7 export (workaround for https://launchpad.net/bugs/1638405)
append_dir LD_LIBRARY_PATH $RUNTIME/usr/lib/$ARCH/libunity

# Pulseaudio export
append_dir LD_LIBRARY_PATH $RUNTIME/usr/lib/$ARCH/pulseaudio

# Tell GStreamer where to find its plugins
export GST_PLUGIN_PATH=$SNAP/usr/lib/$ARCH/gstreamer-1.0
export GST_PLUGIN_SYSTEM_PATH=$RUNTIME/usr/lib/$ARCH/gstreamer-1.0
# gst plugin scanner doesn't install in the correct path: https://github.com/ubuntu/snapcraft-desktop-helpers/issues/43
export GST_PLUGIN_SCANNER=$RUNTIME/usr/lib/$ARCH/gstreamer1.0/gstreamer-1.0/gst-plugin-scanner

# XDG Config
[ "$WITH_RUNTIME" = yes ] && prepend_dir XDG_CONFIG_DIRS $RUNTIME/etc/xdg
prepend_dir XDG_CONFIG_DIRS $SNAP/etc/xdg

# Define snaps' own data dir
[ "$WITH_RUNTIME" = yes ] && prepend_dir XDG_DATA_DIRS $RUNTIME/usr/share
prepend_dir XDG_DATA_DIRS $SNAP/usr/share
prepend_dir XDG_DATA_DIRS $SNAP_USER_DATA

# Set XDG_DATA_HOME to local path
export XDG_DATA_HOME=$SNAP_USER_DATA/.local/share
mkdir -p $XDG_DATA_HOME

# Workaround for GLib < 2.53.2 not searching for schemas in $XDG_DATA_HOME:
#   https://bugzilla.gnome.org/show_bug.cgi?id=741335
prepend_dir XDG_DATA_DIRS $XDG_DATA_HOME

# Set cache folder to local path
export XDG_CACHE_HOME=$SNAP_USER_DATA/.cache
mkdir -p $XDG_CACHE_HOME

# Set config folder to local path
export XDG_CONFIG_HOME=$SNAP_USER_DATA/.config
mkdir -p $XDG_CONFIG_HOME

# Run xdg-user-dirs-update
if [ `which xdg-user-dirs-update` ]; then
   xdg-user-dirs-update
fi

# Create $XDG_RUNTIME_DIR if not exists (to be removed when LP: #1656340 is fixed)
[ -n "$XDG_RUNTIME_DIR" ] && mkdir -p $XDG_RUNTIME_DIR -m 700

# If detect wayland server socket, then set environment so applications prefer
# wayland, and setup compat symlink (until we use user mounts. Remember,
# XDG_RUNTIME_DIR is /run/user/<uid>/snap.$SNAP so look in the parent directory
# for the socket. For details:
# https://forum.snapcraft.io/t/wayland-dconf-and-xdg-runtime-dir/186/10
# Applications that don't support wayland natively may define DISABLE_WAYLAND
# (to any non-empty value) to skip that logic entirely.
if [[ -n "$XDG_RUNTIME_DIR" && -z "$DISABLE_WAYLAND" ]]; then
    wdisplay="wayland-0"
    if [ -n "$WAYLAND_DISPLAY" ]; then
        wdisplay="$WAYLAND_DISPLAY"
    fi
    wayland_sockpath="$XDG_RUNTIME_DIR/../$wdisplay"
    wayland_snappath="$XDG_RUNTIME_DIR/$wdisplay"
    if [ -S "$wayland_sockpath" ]; then
        # if running under wayland, use it
        #export WAYLAND_DEBUG=1
        export GDK_BACKEND="wayland"
        export CLUTTER_BACKEND="wayland"
        export QT_QPA_PLATFORM="wayland-egl"
        # create the compat symlink for now
        if [ ! -e "$wayland_snappath" ]; then
            ln -s "$wayland_sockpath" "$wayland_snappath"
        fi
    fi
fi

# Make PulseAudio socket available inside the snap-specific $XDG_RUNTIME_DIR
if [ -n "$XDG_RUNTIME_DIR" ]; then
    pulsenative="pulse/native"
    pulseaudio_sockpath="$XDG_RUNTIME_DIR/../$pulsenative"
    if [ -S "$pulseaudio_sockpath" ]; then
        export PULSE_SERVER="unix:${pulseaudio_sockpath}"
    fi
fi

# GI repository
[ "$WITH_RUNTIME" = yes ] && prepend_dir GI_TYPELIB_PATH $RUNTIME/usr/lib/$ARCH/girepository-1.0
[ "$WITH_RUNTIME" = yes ] && prepend_dir GI_TYPELIB_PATH $RUNTIME/usr/lib/girepository-1.0
prepend_dir GI_TYPELIB_PATH $SNAP/usr/lib/$ARCH/girepository-1.0
prepend_dir GI_TYPELIB_PATH $SNAP/usr/lib/girepository-1.0
prepend_dir GI_TYPELIB_PATH $SNAP/usr/lib/gjs/girepository-1.0

# Keep an array of data dirs, for looping through them
IFS=':' read -r -a data_dirs_array <<< "$XDG_DATA_DIRS"

# Font Config and themes
export FONTCONFIG_PATH=$RUNTIME/etc/fonts/conf.d
export FONTCONFIG_FILE=$RUNTIME/etc/fonts/fonts.conf

function make_user_fontconfig {
  echo "<fontconfig>"
  if [ -d /home/$USER/.local/share/fonts ]; then
    echo "  <dir>/home/$USER/.local/share/fonts</dir>"
  fi
  if [ -d /home/$USER/.fonts ]; then
    echo "  <dir>/home/$USER/.fonts</dir>"
  fi
  for d in "${data_dirs_array[@]}"; do
    if [ -d "$d/fonts" ]; then
      echo "  <dir>$d/fonts</dir>"
    fi
  done
  # We need to include this default cachedir first so that caching
  # works: without it, fontconfig will try to write to the /home/$USER
  # cachedir and be blocked by AppArmor.
  echo '  <cachedir prefix="xdg">fontconfig</cachedir>'
  if [ -d /home/$USER/.cache/fontconfig ]; then
    echo "  <cachedir>/home/$USER/.cache/fontconfig</cachedir>"
  fi
  echo "</fontconfig>"
}

if [ $needs_update = true ]; then
  rm -rf $XDG_DATA_HOME/{fontconfig,fonts,fonts-*,themes,.themes}
  mkdir -p $XDG_CONFIG_HOME/fontconfig
  make_user_fontconfig > $XDG_CONFIG_HOME/fontconfig/fonts.conf

  # the themes symlink are needed for GTK 3.18 when the prefix isn't changed
  # GTK 3.20 looks into XDG_DATA_DIR which has connected themes.
  ln -sf $RUNTIME/usr/share/themes $XDG_DATA_HOME
  ln -sfn $RUNTIME/usr/share/themes $SNAP_USER_DATA/.themes
fi

# Build mime.cache
# needed for gtk and qt icon
if [ $needs_update = true ]; then
  rm -rf $XDG_DATA_HOME/mime
  if [ ! -f $RUNTIME/usr/share/mime/mime.cache ]; then
    if [ `which update-mime-database` ]; then
      cp --preserve=timestamps -dR $RUNTIME/usr/share/mime $XDG_DATA_HOME
      update-mime-database $XDG_DATA_HOME/mime
    fi
  fi
fi

# Ensure the app finds locale definitions (requires locales-all to be installed)
append_dir LOCPATH $SNAP/usr/lib/locale

# Gio modules and cache (including gsettings module)
export GIO_MODULE_DIR=$XDG_CACHE_HOME/gio-modules
function compile_giomodules {
  if [ -f $1/glib-2.0/gio-querymodules ]; then
    rm -rf $GIO_MODULE_DIR
    mkdir -p $GIO_MODULE_DIR
    ln -s $1/gio/modules/*.so $GIO_MODULE_DIR
    $1/glib-2.0/gio-querymodules $GIO_MODULE_DIR
  fi
}
if [ $needs_update = true ]; then
  compile_giomodules $RUNTIME/usr/lib/$ARCH
fi

# Setup compiled gsettings schema
GS_SCHEMA_DIR=$XDG_DATA_HOME/glib-2.0/schemas
function compile_schemas {
  if [ -f "$1" ]; then
    rm -rf $GS_SCHEMA_DIR
    mkdir -p $GS_SCHEMA_DIR
    for d in "${data_dirs_array[@]}"; do
      schema_dir=$d/glib-2.0/schemas
      if [ -f "$schema_dir/gschemas.compiled" ]; then
        # This directory already has compiled schemas
        continue
      fi
      if [ -n "$(ls -A $schema_dir/*.xml 2>/dev/null)" ]; then
        ln -s $schema_dir/*.xml $GS_SCHEMA_DIR
      fi
      if [ -n "$(ls -A $schema_dir/*.override 2>/dev/null)" ]; then
        ln -s $schema_dir/*.override $GS_SCHEMA_DIR
      fi
    done
    # Only compile schemas if we copied anyting
    if [ -n "$(ls -A $GS_SCHEMA_DIR/*.xml $GS_SCHEMA_DIR/*.override 2>/dev/null)" ]; then
      "$1" $GS_SCHEMA_DIR
    fi
  fi
}
if [ $needs_update = true ]; then
  compile_schemas $RUNTIME/usr/lib/$ARCH/glib-2.0/glib-compile-schemas
fi

# Enable gsettings user changes
# symlink the dconf file if home plug is connected for read
DCONF_DEST_USER_DIR=$SNAP_USER_DATA/.config/dconf
if [ ! -f $DCONF_DEST_USER_DIR/user ]; then
  if [ -f /home/$USER/.config/dconf/user ]; then
    mkdir -p $DCONF_DEST_USER_DIR
    ln -s /home/$USER/.config/dconf/user $DCONF_DEST_USER_DIR
  fi
fi

# Testability support
append_dir LD_LIBRARY_PATH $SNAP/testability
append_dir LD_LIBRARY_PATH $SNAP/testability/$ARCH
append_dir LD_LIBRARY_PATH $SNAP/testability/$ARCH/mesa

# Gdk-pixbuf loaders
export GDK_PIXBUF_MODULE_FILE=$XDG_CACHE_HOME/gdk-pixbuf-loaders.cache
export GDK_PIXBUF_MODULEDIR=$RUNTIME/usr/lib/$ARCH/gdk-pixbuf-2.0/2.10.0/loaders
if [ $needs_update = true ]; then
  rm -f $GDK_PIXBUF_MODULE_FILE
  if [ -f $RUNTIME/usr/lib/$ARCH/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders ]; then
    $RUNTIME/usr/lib/$ARCH/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders > $GDK_PIXBUF_MODULE_FILE
  fi
fi

# Icon themes cache
if [ $needs_update = true ]; then
  rm -rf $XDG_DATA_HOME/icons
  mkdir -p $XDG_DATA_HOME/icons
  for d in "${data_dirs_array[@]}"; do
    for i in $d/icons/*; do
      if [ -f "$i/index.theme" -a ! -f "$i/icon-theme.cache" ]; then
        theme_dir=$XDG_DATA_HOME/icons/$(basename "$i")
        if [ ! -d "$theme_dir" ]; then
          mkdir -p "$theme_dir"
          ln -s $i/* "$theme_dir"
          if [ -f $RUNTIME/usr/sbin/update-icon-caches ]; then
            $RUNTIME/usr/sbin/update-icon-caches "$theme_dir"
          elif [ -f $RUNTIME/usr/sbin/update-icon-cache.gtk2 ]; then
            $RUNTIME/usr/sbin/update-icon-cache.gtk2 "$theme_dir"
          fi
        fi
      fi
    done
  done
fi

# GTK theme and behavior modifier
# Those can impact the theme engine used by Qt as well
gtk_configs=(.config/gtk-3.0/settings.ini .config/gtk-3.0/bookmarks .config/gtk-2.0/gtkfilechooser.ini)
for f in ${gtk_configs[@]}; do
  dest="$SNAP_USER_DATA/$f"
  if [ ! -L "$dest" ]
  then
    mkdir -p `dirname $dest`
    ln -s /home/$USER/$f $dest
  fi
done