gtk-launch

#!/bin/bash

# Set to '2' for GTK2 apps, set to '3' for GTK3 apps
GTK_SELECTOR=2

if [ "$SNAP_ARCH" == "amd64" ]; then
  ARCH="x86_64-linux-gnu"
elif [ "$SNAP_ARCH" == "armhf" ]; then
  ARCH="arm-linux-gnueabihf"
else
  ARCH="$SNAP_ARCH-linux-gnu"
fi

if [ $GTK_SELECTOR -eq 2 ]; then
  GTK_UPDATE_ICON_CACHE=gtk-update-icon-cache
elif [ $GTK_SELECTOR -eq 3 ]; then
  GTK_UPDATE_ICON_CACHE=gtk-update-icon-cache-3.0
  # GTK modules
  export GTK_PATH=$SNAP/usr/lib/$ARCH/gtk-3.0
else
  echo "Please specify a valid GTK version (2 or 3)"
  exit 0
fi

export LD_LIBRARY_PATH=$SNAP/usr/lib/$ARCH:$LD_LIBRARY_PATH

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

# Mesa Libs
export LD_LIBRARY_PATH=$SNAP/usr/lib/$ARCH/mesa:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=$SNAP/usr/lib/$ARCH/mesa-egl:$LD_LIBRARY_PATH

# XDG Config
export XDG_CONFIG_DIRS=$SNAP/etc/xdg:$XDG_CONFIG_DIRS
export XDG_CONFIG_DIRS=$SNAP/usr/xdg:$XDG_CONFIG_DIRS

# Note: this doesn't seem to work, QML's LocalStorage either ignores
# or fails to use $SNAP_USER_DATA if defined here
export XDG_DATA_DIRS=$SNAP_USER_DATA:$XDG_DATA_DIRS
export XDG_DATA_DIRS=$SNAP/usr/share:$XDG_DATA_DIRS

# Not good, needed for fontconfig
export XDG_DATA_HOME=$SNAP/usr/share

# Font Config
export FONTCONFIG_PATH=$SNAP/etc/fonts/config.d
export FONTCONFIG_FILE=$SNAP/etc/fonts/fonts.conf

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

# Necessary for the SDK to find the translations directory
#export APP_DIR=$SNAP

# Set XDG_DATA_HOME to local path, dependent on snap version
export XDG_DATA_HOME=$SNAP_USER_DATA/.local-$SNAP_VERSION/share
export XDG_DATA_DIRS=$XDG_DATA_HOME:$XDG_DATA_DIRS
mkdir -p $XDG_DATA_HOME

# Set cache folder to local path, dependent on snap version
export XDG_CACHE_HOME=$SNAP_USER_DATA/.cache-$SNAP_VERSION
mkdir -p $XDG_CACHE_HOME

# Setup GI Repository typelibs (needed as some packages doesn't support multiarch)
export GI_TYPELIB_PATH=$SNAP/usr/lib/$ARCH/girepository-1.0:$SNAP/usr/lib/girepository-1.0

# Not good, needed for fontconfig and themes
ln -sf $SNAP/usr/share/{fontconfig,fonts,fonts-*,themes} $XDG_DATA_HOME

# Gio modules and cache
export GIO_MODULE_DIR=$XDG_CACHE_HOME/gio-modules

if [ ! -d $GIO_MODULE_DIR ]; then
  mkdir -p $GIO_MODULE_DIR
  ln -s $SNAP/usr/lib/$ARCH/gio/modules/*.so $GIO_MODULE_DIR
  $SNAP/usr/lib/$ARCH/glib-2.0/gio-querymodules $GIO_MODULE_DIR
fi

# Build mime.cache
if [ ! -d $XDG_DATA_HOME/mime ]; then
  cp -a $SNAP/usr/share/mime $XDG_DATA_HOME
  update-mime-database $XDG_DATA_HOME/mime
fi

# Setup GDK pixbuf loaders
export GDK_PIXBUF_MODULE_FILE=$XDG_CACHE_HOME/gdk-pixbuf-loaders.cache
export GDK_PIXBUF_MODULEDIR=$SNAP/usr/lib/$ARCH/gdk-pixbuf-2.0/2.10.0/loaders

if [ ! -e $GDK_PIXBUF_MODULE_FILE ]; then
  $SNAP/usr/lib/$ARCH/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders > $GDK_PIXBUF_MODULE_FILE
fi

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

# Setup compiled gsettings schema
GS_SCHEMA_DIR=$XDG_DATA_HOME/glib-2.0/schemas

if [ ! -d $GS_SCHEMA_DIR ]; then
  mkdir -p $GS_SCHEMA_DIR
  for d in "${data_dirs_array[@]}"; do
    ln -s $d/glib-2.0/schemas/*.xml $GS_SCHEMA_DIR
  done

  $SNAP/usr/lib/$ARCH/glib-2.0/glib-compile-schemas $GS_SCHEMA_DIR
fi

# Icon themes cache
if [ ! -d $XDG_DATA_HOME/icons ]; then
  mkdir -p $XDG_DATA_HOME/icons
  for d in "${data_dirs_array[@]}"; do
    for i in $d/icons/*; do
      if [ -d "$i" ]; then
        theme_dir=$XDG_DATA_HOME/icons/$(basename "$i")
        mkdir -p "$theme_dir"
        ln -s $i/* "$theme_dir"
        $SNAP/usr/sbin/update-icon-caches "$theme_dir"
        "$(GTK_UPDATE_ICON_CACHE "$theme_dir")"
      fi
    done
  done
fi

cd $SNAP
exec "$@"