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#!/usr/bin/env python3
# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
import os
import sys
import subprocess
import json
# Paths to shared libraries and qml imports on the Qt installation on the web server.
# "$QTDIR" is replaced by qtloader.js at load time (defaults to "qt"), and makes
# possible to relocate the application build relative to the Qt build on the web server.
qt_lib_path = "$QTDIR/lib"
qt_qml_path = "$QTDIR/qml"
# Path to QML imports on the in-memory file system provided by Emscripten. This script emits
# preload commands which copies QML imports to this directory. In addition, preload_qt_plugins.py
# creates (and preloads) a qt.conf file which makes Qt load QML plugins from this location.
qt_deploy_qml_path = "/qt/qml"
def eprint(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
def preload_file(source, destination):
preload_files.append({"source": source, "destination": destination})
def extract_preload_files_from_imports(imports):
libraries = []
for qml_import in imports:
try:
relative_path = qml_import["relativePath"]
plugin = qml_import["plugin"]
# plugin .so
plugin_filename = "lib" + plugin + ".so"
so_plugin_source_path = os.path.join(
qt_qml_path, relative_path, plugin_filename
)
so_plugin_destination_path = os.path.join(
qt_deploy_qml_path, relative_path, plugin_filename
)
preload_file(so_plugin_source_path, so_plugin_destination_path)
so_plugin_qt_install_path = os.path.join(
qt_wasm_path, "qml", relative_path, plugin_filename
)
# qmldir file
qmldir_source_path = os.path.join(qt_qml_path, relative_path, "qmldir")
qmldir_destination_path = os.path.join(
qt_deploy_qml_path, relative_path, "qmldir"
)
preload_file(qmldir_source_path, qmldir_destination_path)
except Exception as e:
eprint(e)
continue
return libraries
if __name__ == "__main__":
if len(sys.argv) != 4:
print("Usage: python preload_qml_imports.py <qml-source-path> <qt-host-path> <qt-wasm-path>")
sys.exit(1)
qml_source_path = sys.argv[1]
qt_host_path = sys.argv[2]
qt_wasm_path = sys.argv[3]
qml_import_path = os.path.join(qt_wasm_path, "qml")
qmlimportsscanner_path = os.path.join(qt_host_path, "libexec/qmlimportscanner")
eprint("runing qmlimportsscanner")
command = [qmlimportsscanner_path, "-rootPath", qml_source_path, "-importPath", qml_import_path]
result = subprocess.run(command, stdout=subprocess.PIPE)
imports = json.loads(result.stdout)
preload_files = []
libraries = extract_preload_files_from_imports(imports)
# Deploy plugin dependencies, that is, shared libraries used by the plugins.
# Skip some of the obvious libraries which will be
skip_libraries = [
"libQt6Core.so",
"libQt6Gui.so",
"libQt6Quick.so",
"libQt6Qml.so" "libQt6Network.so",
"libQt6OpenGL.so",
]
libraries = set(libraries) - set(skip_libraries)
for library in libraries:
source = os.path.join(qt_lib_path, library)
# Emscripten looks for shared libraries on "/", shared libraries
# most be deployed there instead of at /qt/lib
destination = os.path.join("/", library)
preload_file(source, destination)
print(json.dumps(preload_files, indent=2))
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