06ab82d945
Dynamic linking on WebAssembly involves preloading .so libraries during startup of application. Normally, those plugin preload lists are generating manually by user, which can be tedious. Add a bash script which demonstrates how to call python programs to generate preload lists. Change-Id: I0a9869ad0d26606f8b33af2c38248cec3088dd0d Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io> (cherry picked from commit 010ed1788402bf98d9b98500fdb1f61c333cebe5) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
58 lines
1.9 KiB
Python
Executable File
58 lines
1.9 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (C) 2023 The Qt Company Ltd.
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# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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import os
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import sys
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import json
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# Path to plugins on the Qt installation on the web server. "$QTPATH" is replaced by qtloader.js
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# at load time (defaults to "qt"), which makes it possible to relocate the application build relative
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# to the Qt build on the web server.
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qt_plugins_path = "$QTDIR/plugins"
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# Path to plugins on the in-memory file system provided by Emscripten. This script emits
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# preload commands which copies plugins to this directory.
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qt_deploy_plugins_path = "/qt/plugins"
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def find_so_files(directory):
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so_files = []
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for root, dirs, files in os.walk(directory):
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for file in files:
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if file.endswith(".so"):
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relative_path = os.path.relpath(os.path.join(root, file), directory)
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so_files.append(relative_path)
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return so_files
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if __name__ == "__main__":
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if len(sys.argv) != 3:
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print("Usage: python preload_qt_plugins.py <qt-wasm-path> <output-dir>")
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sys.exit(1)
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qt_wasm_path = sys.argv[1]
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output_dir = sys.argv[2]
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# preload all plugins
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plugins = find_so_files(os.path.join(qt_wasm_path, "plugins"))
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preload = [
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{
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"source": os.path.join(qt_plugins_path, plugin),
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"destination": os.path.join(qt_deploy_plugins_path, plugin),
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}
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for plugin in plugins
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]
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# Create and preload qt.conf which will tell Qt to look for plugins
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# and QML imports in /qt/plugins and /qt/qml. The qt.conf file is
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# written to the current directory.
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qtconf = "[Paths]\nPrefix = /qt\n"
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with open(f"{output_dir}/qt.conf", "w") as f:
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f.write(qtconf)
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preload.append({"source": "qt.conf", "destination": "/qt.conf"})
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with open(f"{output_dir}/qt_plugins.json", "w") as f:
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f.write(json.dumps(preload, indent=2))
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