mirror of
https://github.com/LibreTranslate/LibreTranslate.git
synced 2024-11-16 20:40:10 +01:00
75 lines
3.3 KiB
Python
75 lines
3.3 KiB
Python
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from argostranslate import package, translate
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from packaging import version
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import libretranslate.language
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def boot(load_only=None, update_models=False, install_models=False):
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try:
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if update_models:
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check_and_install_models(load_only_lang_codes=load_only, update=update_models)
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else:
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check_and_install_models(force=install_models, load_only_lang_codes=load_only)
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except Exception as e:
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print("Cannot update models (normal if you're offline): %s" % str(e))
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def check_and_install_models(force=False, load_only_lang_codes=None,update=False):
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if len(package.get_installed_packages()) < 2 or force or update:
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# Update package definitions from remote
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print("Updating language models")
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package.update_package_index()
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# Load available packages from local package index
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available_packages = package.get_available_packages()
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installed_packages = package.get_installed_packages()
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print("Found %s models" % len(available_packages))
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if load_only_lang_codes is not None:
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# load_only_lang_codes: List[str] (codes)
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# Ensure the user does not use any unavailable language code.
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unavailable_lang_codes = set(load_only_lang_codes)
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for pack in available_packages:
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unavailable_lang_codes -= {pack.from_code, pack.to_code}
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if unavailable_lang_codes:
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raise ValueError(
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"Unavailable language codes: %s."
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% ",".join(sorted(unavailable_lang_codes))
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)
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# Keep only the packages that have both from_code and to_code in our list.
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available_packages = [
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pack
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for pack in available_packages
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if pack.from_code in load_only_lang_codes and pack.to_code in load_only_lang_codes
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]
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if not available_packages:
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raise ValueError("no available package")
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print("Keep %s models" % len(available_packages))
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# Download and install all available packages
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for available_package in available_packages:
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update = False
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if not force:
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for pack in installed_packages:
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if (
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pack.from_code == available_package.from_code
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and pack.to_code == available_package.to_code
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):
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update = True
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if version.parse(pack.package_version) < version.parse(available_package.package_version):
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print(
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f"Updating {available_package} ({pack.package_version}->{available_package.package_version}) ..."
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)
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pack.update()
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if not update:
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print(
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f"Downloading {available_package} ({available_package.package_version}) ..."
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)
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available_package.install()
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# reload installed languages
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libretranslate.language.languages = translate.get_installed_languages()
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print(
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f"Loaded support for {len(translate.get_installed_languages())} languages ({len(available_packages)} models total)!"
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)
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