diff options
Diffstat (limited to 'devscripts/make_lazy_extractors.py')
| -rw-r--r-- | devscripts/make_lazy_extractors.py | 213 |
1 files changed, 118 insertions, 95 deletions
diff --git a/devscripts/make_lazy_extractors.py b/devscripts/make_lazy_extractors.py index 1e22620..69e1758 100644 --- a/devscripts/make_lazy_extractors.py +++ b/devscripts/make_lazy_extractors.py @@ -1,105 +1,128 @@ #!/usr/bin/env python3 -from __future__ import unicode_literals, print_function -from inspect import getsource -import io +# Allow direct execution import os -from os.path import dirname as dirn +import shutil import sys -sys.path.insert(0, dirn(dirn((os.path.abspath(__file__))))) - -lazy_extractors_filename = sys.argv[1] if len(sys.argv) > 1 else 'hypervideo_dl/extractor/lazy_extractors.py' -if os.path.exists(lazy_extractors_filename): - os.remove(lazy_extractors_filename) - -# Block plugins from loading -plugins_dirname = 'ytdlp_plugins' -plugins_blocked_dirname = 'ytdlp_plugins_blocked' -if os.path.exists(plugins_dirname): - os.rename(plugins_dirname, plugins_blocked_dirname) - -from hypervideo_dl.extractor import _ALL_CLASSES -from hypervideo_dl.extractor.common import InfoExtractor, SearchInfoExtractor +sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__)))) -if os.path.exists(plugins_blocked_dirname): - os.rename(plugins_blocked_dirname, plugins_dirname) -with open('devscripts/lazy_load_template.py', 'rt') as f: - module_template = f.read() - -CLASS_PROPERTIES = ['ie_key', 'working', '_match_valid_url', 'suitable', '_match_id', 'get_temp_id'] -module_contents = [ - module_template, - *[getsource(getattr(InfoExtractor, k)) for k in CLASS_PROPERTIES], - '\nclass LazyLoadSearchExtractor(LazyLoadExtractor):\n pass\n'] +from inspect import getsource -ie_template = ''' +from devscripts.utils import get_filename_args, read_file, write_file + +NO_ATTR = object() +STATIC_CLASS_PROPERTIES = [ + 'IE_NAME', '_ENABLED', '_VALID_URL', # Used for URL matching + '_WORKING', 'IE_DESC', '_NETRC_MACHINE', 'SEARCH_KEY', # Used for --extractor-descriptions + 'age_limit', # Used for --age-limit (evaluated) + '_RETURN_TYPE', # Accessed in CLI only with instance (evaluated) +] +CLASS_METHODS = [ + 'ie_key', 'suitable', '_match_valid_url', # Used for URL matching + 'working', 'get_temp_id', '_match_id', # Accessed just before instance creation + 'description', # Used for --extractor-descriptions + 'is_suitable', # Used for --age-limit + 'supports_login', 'is_single_video', # Accessed in CLI only with instance +] +IE_TEMPLATE = ''' class {name}({bases}): - _module = '{module}' + _module = {module!r} ''' - - -def get_base_name(base): - if base is InfoExtractor: - return 'LazyLoadExtractor' - elif base is SearchInfoExtractor: - return 'LazyLoadSearchExtractor' - else: - return base.__name__ - - -def build_lazy_ie(ie, name): - s = ie_template.format( - name=name, - bases=', '.join(map(get_base_name, ie.__bases__)), - module=ie.__module__) - valid_url = getattr(ie, '_VALID_URL', None) - if not valid_url and hasattr(ie, '_make_valid_url'): - valid_url = ie._make_valid_url() - if valid_url: - s += f' _VALID_URL = {valid_url!r}\n' - if not ie._WORKING: - s += ' _WORKING = False\n' - if ie.suitable.__func__ is not InfoExtractor.suitable.__func__: - s += f'\n{getsource(ie.suitable)}' - return s - - -# find the correct sorting and add the required base classes so that subclasses -# can be correctly created -classes = _ALL_CLASSES[:-1] -ordered_cls = [] -while classes: - for c in classes[:]: - bases = set(c.__bases__) - set((object, InfoExtractor, SearchInfoExtractor)) - stop = False - for b in bases: - if b not in classes and b not in ordered_cls: - if b.__name__ == 'GenericIE': - exit() - classes.insert(0, b) - stop = True - if stop: - break - if all(b in ordered_cls for b in bases): - ordered_cls.append(c) - classes.remove(c) - break -ordered_cls.append(_ALL_CLASSES[-1]) - -names = [] -for ie in ordered_cls: - name = ie.__name__ - src = build_lazy_ie(ie, name) - module_contents.append(src) - if ie in _ALL_CLASSES: - names.append(name) - -module_contents.append( - '\n_ALL_CLASSES = [{0}]'.format(', '.join(names))) - -module_src = '\n'.join(module_contents) + '\n' - -with io.open(lazy_extractors_filename, 'wt', encoding='utf-8') as f: - f.write(module_src) +MODULE_TEMPLATE = read_file('devscripts/lazy_load_template.py') + + +def main(): + lazy_extractors_filename = get_filename_args(default_outfile='hypervideo_dl/extractor/lazy_extractors.py') + if os.path.exists(lazy_extractors_filename): + os.remove(lazy_extractors_filename) + + _ALL_CLASSES = get_all_ies() # Must be before import + + from hypervideo_dl.extractor.common import InfoExtractor, SearchInfoExtractor + + DummyInfoExtractor = type('InfoExtractor', (InfoExtractor,), {'IE_NAME': NO_ATTR}) + module_src = '\n'.join(( + MODULE_TEMPLATE, + ' _module = None', + *extra_ie_code(DummyInfoExtractor), + '\nclass LazyLoadSearchExtractor(LazyLoadExtractor):\n pass\n', + *build_ies(_ALL_CLASSES, (InfoExtractor, SearchInfoExtractor), DummyInfoExtractor), + )) + + write_file(lazy_extractors_filename, f'{module_src}\n') + + +def get_all_ies(): + PLUGINS_DIRNAME = 'ytdlp_plugins' + BLOCKED_DIRNAME = f'{PLUGINS_DIRNAME}_blocked' + if os.path.exists(PLUGINS_DIRNAME): + # os.rename cannot be used, e.g. in Docker. See https://github.com/hypervideo/hypervideo/pull/4958 + shutil.move(PLUGINS_DIRNAME, BLOCKED_DIRNAME) + try: + from hypervideo_dl.extractor.extractors import _ALL_CLASSES + finally: + if os.path.exists(BLOCKED_DIRNAME): + shutil.move(BLOCKED_DIRNAME, PLUGINS_DIRNAME) + return _ALL_CLASSES + + +def extra_ie_code(ie, base=None): + for var in STATIC_CLASS_PROPERTIES: + val = getattr(ie, var) + if val != (getattr(base, var) if base else NO_ATTR): + yield f' {var} = {val!r}' + yield '' + + for name in CLASS_METHODS: + f = getattr(ie, name) + if not base or f.__func__ != getattr(base, name).__func__: + yield getsource(f) + + +def build_ies(ies, bases, attr_base): + names = [] + for ie in sort_ies(ies, bases): + yield build_lazy_ie(ie, ie.__name__, attr_base) + if ie in ies: + names.append(ie.__name__) + + yield f'\n_ALL_CLASSES = [{", ".join(names)}]' + + +def sort_ies(ies, ignored_bases): + """find the correct sorting and add the required base classes so that subclasses can be correctly created""" + classes, returned_classes = ies[:-1], set() + assert ies[-1].__name__ == 'GenericIE', 'Last IE must be GenericIE' + while classes: + for c in classes[:]: + bases = set(c.__bases__) - {object, *ignored_bases} + restart = False + for b in sorted(bases, key=lambda x: x.__name__): + if b not in classes and b not in returned_classes: + assert b.__name__ != 'GenericIE', 'Cannot inherit from GenericIE' + classes.insert(0, b) + restart = True + if restart: + break + if bases <= returned_classes: + yield c + returned_classes.add(c) + classes.remove(c) + break + yield ies[-1] + + +def build_lazy_ie(ie, name, attr_base): + bases = ', '.join({ + 'InfoExtractor': 'LazyLoadExtractor', + 'SearchInfoExtractor': 'LazyLoadSearchExtractor', + }.get(base.__name__, base.__name__) for base in ie.__bases__) + + s = IE_TEMPLATE.format(name=name, module=ie.__module__, bases=bases) + return s + '\n'.join(extra_ie_code(ie, attr_base)) + + +if __name__ == '__main__': + main() |