Function main

Platforms/emscripten/wasm_assets.py:191–230

()

def main() -> None:
    args = parser.parse_args()

    relative_prefix = args.prefix.relative_to(pathlib.Path("/"))
    args.srcdir = SRCDIR
    args.srcdir_lib = SRCDIR_LIB
    args.wasm_root = args.buildroot / relative_prefix
    args.wasm_stdlib = args.wasm_root / WASM_STDLIB
    args.wasm_dynload = args.wasm_root / WASM_DYNLOAD

    # bpo-17004: zipimport supports only zlib compression.
    # Emscripten ZIP_STORED + -sLZ4=1 linker flags results in larger file.
    args.compression = zipfile.ZIP_DEFLATED
    args.compresslevel = 9

    args.builddir = get_builddir(args)
    args.sysconfig_data = get_sysconfigdata(args)
    if not args.sysconfig_data.is_file():
        raise ValueError(f"sysconfigdata file {args.sysconfig_data} missing.")

    extmods = detect_extension_modules(args)
    omit_files = list(OMIT_FILES)
    if sysconfig.get_platform().startswith("emscripten"):
        omit_files.extend(OMIT_NETWORKING_FILES)
    for modname, modfiles in OMIT_MODULE_FILES.items():
        if not extmods.get(modname):
            omit_files.extend(modfiles)

    args.omit_files_absolute = {
        (args.srcdir_lib / name).resolve() for name in omit_files
    }

    # Empty, unused directory for dynamic libs, but required for site initialization.
    args.wasm_dynload.mkdir(parents=True, exist_ok=True)
    marker = args.wasm_dynload / ".empty"
    marker.touch()
    # The rest of stdlib that's useful in a WASM context.
    create_stdlib_zip(args)
    size = round(args.output.stat().st_size / 1024**2, 2)
    parser.exit(0, f"Created {args.output} ({size} MiB)\n")


if __name__ == "__main__":