[cleanup] Sort imports

[yt-dlp.git] / devscripts / make_lazy_extractors.py

diff --git a/devscripts/make_lazy_extractors.py b/devscripts/make_lazy_extractors.py
index 8627d0b1caf0cc75bab891866cba2291eb0217bf..6d5f96cf0e472b2c412725915871bf42962bf0e2 100644 (file)
--- a/devscripts/make_lazy_extractors.py
+++ b/devscripts/make_lazy_extractors.py
@@ -1,63 +1,102 @@
-from __future__ import unicode_literals, print_function
-
-from inspect import getsource
+#!/usr/bin/env python3
 import os
-from os.path import dirname as dirn
 import sys
+from inspect import getsource
+from os.path import dirname as dirn
 
-print('WARNING: Lazy loading extractors is an experimental feature that may not always work', file=sys.stderr)
-
-sys.path.insert(0, dirn(dirn((os.path.abspath(__file__)))))
+sys.path.insert(0, dirn(dirn(os.path.abspath(__file__))))
 
-lazy_extractors_filename = sys.argv[1]
+lazy_extractors_filename = sys.argv[1] if len(sys.argv) > 1 else 'yt_dlp/extractor/lazy_extractors.py'
 if os.path.exists(lazy_extractors_filename):
     os.remove(lazy_extractors_filename)
 
-from youtube_dl.extractor import _ALL_CLASSES
-from youtube_dl.extractor.common import InfoExtractor
+# 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 yt_dlp.extractor import _ALL_CLASSES
+from yt_dlp.extractor.common import InfoExtractor, SearchInfoExtractor
 
-with open('devscripts/lazy_load_template.py', 'rt') as f:
+if os.path.exists(plugins_blocked_dirname):
+    os.rename(plugins_blocked_dirname, plugins_dirname)
+
+with open('devscripts/lazy_load_template.py') as f:
     module_template = f.read()
 
-module_contents = [module_template + '\n' + getsource(InfoExtractor.suitable)]
+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']
 
 ie_template = '''
-class {name}(LazyLoadExtractor):
-    _VALID_URL = {valid_url!r}
+class {name}({bases}):
     _module = '{module}'
 '''
 
-make_valid_template = '''
-    @classmethod
-    def _make_valid_url(cls):
-        return {!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):
-    valid_url = getattr(ie, '_VALID_URL', None)
     s = ie_template.format(
         name=name,
-        valid_url=valid_url,
+        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 += getsource(ie.suitable)
-    if hasattr(ie, '_make_valid_url'):
-        # search extractors
-        s += make_valid_template.format(ie._make_valid_url())
+        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__) - {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 _ALL_CLASSES:
-    name = ie.ie_key() + 'IE'
+for ie in ordered_cls:
+    name = ie.__name__
     src = build_lazy_ie(ie, name)
     module_contents.append(src)
-    names.append(name)
+    if ie in _ALL_CLASSES:
+        names.append(name)
 
 module_contents.append(
-    '_ALL_CLASSES = [{}]'.format(', '.join(names)))
+    '\n_ALL_CLASSES = [{}]'.format(', '.join(names)))
 
-module_src = '\n'.join(module_contents)
+module_src = '\n'.join(module_contents) + '\n'
 
-with open(lazy_extractors_filename, 'wt') as f:
+with open(lazy_extractors_filename, 'wt', encoding='utf-8') as f:
     f.write(module_src)