Launch Qt and Electron apps under pure Wayland with support for Flatpak

wayland-launch.sh

#!/bin/sh

platform_args=""
flatpak_args=""

# Check platform argument
case "$1" in
    -electron)
        platform=electron
        ;;
    -qt5)
        platform=qt
        ;;
    *)
        echo "Usage: $0 -electron|-qt5 [command]"
        exit 1
esac

# Extract app name and make $@ point to it's args
app="$2"
shift 2

if [ "$XDG_SESSION_TYPE" = "wayland" ]; then
    # Check if an application is started through flatpak
    test "$(basename "$app")" = "flatpak" && using_flatpak=1

    # On GNOME retrieve cursor size from settings and pass to an application
    gnome_cursor_size="$(gsettings get org.gnome.desktop.interface cursor-size 2>/dev/null)"
    if [ -n "$gnome_cursor_size" ]; then
        if [ -n "$using_flatpak" ]; then
            flatpak_args="--env=XCURSOR_SIZE=$gnome_cursor_size --env=DISPLAY="
        else
            export XCURSOR_SIZE="$gnome_cursor_size"
            export DISPLAY=
        fi
    fi

    case "$platform" in
        electron)
            platform_args="--enable-features=UseOzonePlatform,WaylandWindowDecorations"
            platform_args="$platform_args --ozone-platform=wayland"
            ;;
        qt)
            platform_args="-platform wayland"
            if [ -n "$using_flatpak" ]; then
                flatpak_args="$flatpak_args --env=QT_QPA_PLATFORM=wayland"
            else
                export QT_QPA_PLATFORM=wayland
            fi
            ;;
    esac
fi

exec "$app" $flatpak_args "$@" $platform_args