aboutsummaryrefslogtreecommitdiff
path: root/devscripts/make_lazy_extractors.py
diff options
context:
space:
mode:
Diffstat (limited to 'devscripts/make_lazy_extractors.py')
-rw-r--r--devscripts/make_lazy_extractors.py63
1 files changed, 63 insertions, 0 deletions
diff --git a/devscripts/make_lazy_extractors.py b/devscripts/make_lazy_extractors.py
new file mode 100644
index 000000000..8627d0b1c
--- /dev/null
+++ b/devscripts/make_lazy_extractors.py
@@ -0,0 +1,63 @@
+from __future__ import unicode_literals, print_function
+
+from inspect import getsource
+import os
+from os.path import dirname as dirn
+import sys
+
+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__)))))
+
+lazy_extractors_filename = sys.argv[1]
+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
+
+with open('devscripts/lazy_load_template.py', 'rt') as f:
+ module_template = f.read()
+
+module_contents = [module_template + '\n' + getsource(InfoExtractor.suitable)]
+
+ie_template = '''
+class {name}(LazyLoadExtractor):
+ _VALID_URL = {valid_url!r}
+ _module = '{module}'
+'''
+
+make_valid_template = '''
+ @classmethod
+ def _make_valid_url(cls):
+ return {!r}
+'''
+
+
+def build_lazy_ie(ie, name):
+ valid_url = getattr(ie, '_VALID_URL', None)
+ s = ie_template.format(
+ name=name,
+ valid_url=valid_url,
+ module=ie.__module__)
+ 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())
+ return s
+
+names = []
+for ie in _ALL_CLASSES:
+ name = ie.ie_key() + 'IE'
+ src = build_lazy_ie(ie, name)
+ module_contents.append(src)
+ names.append(name)
+
+module_contents.append(
+ '_ALL_CLASSES = [{}]'.format(', '.join(names)))
+
+module_src = '\n'.join(module_contents)
+
+with open(lazy_extractors_filename, 'wt') as f:
+ f.write(module_src)