mirror of
https://github.com/LibreTranslate/LibreTranslate.git
synced 2024-11-21 23:41:01 +00:00
94 lines
3.4 KiB
Python
94 lines
3.4 KiB
Python
from pathlib import Path
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import polyglot
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from argostranslate import package, translate
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import app.language
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def boot(load_only=None):
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try:
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check_and_install_models(load_only_lang_codes=load_only)
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check_and_install_transliteration()
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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):
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if len(package.get_installed_packages()) < 2 or force:
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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.load_available_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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print(
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"Downloading %s (%s) ..."
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% (available_package, available_package.package_version)
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)
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download_path = available_package.download()
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package.install_from_path(download_path)
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# reload installed languages
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app.language.languages = translate.load_installed_languages()
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print(
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"Loaded support for %s languages (%s models total)!"
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% (len(translate.load_installed_languages()), len(available_packages))
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)
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def check_and_install_transliteration(force=False):
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# 'en' is not a supported transliteration language
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transliteration_languages = [
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l.code for l in app.language.languages if l.code != "en"
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]
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# check installed
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install_needed = []
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if not force:
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t_packages_path = Path(polyglot.polyglot_path) / "transliteration2"
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for lang in transliteration_languages:
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if not (
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t_packages_path / lang / f"transliteration.{lang}.tar.bz2"
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).exists():
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install_needed.append(lang)
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else:
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install_needed = transliteration_languages
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# install the needed transliteration packages
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if install_needed:
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print(
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f"Installing transliteration models for the following languages: {', '.join(install_needed)}"
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)
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from polyglot.downloader import Downloader
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downloader = Downloader()
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for lang in install_needed:
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downloader.download(f"transliteration2.{lang}")
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