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-rw-r--r--.gitignore1
-rw-r--r--Makefile8
-rw-r--r--devscripts/lazy_load_template.py17
-rw-r--r--devscripts/make_lazy_extractors.py63
-rw-r--r--youtube_dl/extractor/__init__.py20
5 files changed, 100 insertions, 9 deletions
diff --git a/.gitignore b/.gitignore
index 26dbde73d..72c10425d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@ README.txt
youtube-dl.1
youtube-dl.bash-completion
youtube-dl.fish
+youtube_dl/extractor/lazy_extractors.py
youtube-dl
youtube-dl.exe
youtube-dl.tar.gz
diff --git a/Makefile b/Makefile
index ba7f7ed36..06cffcb71 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
all: youtube-dl README.md CONTRIBUTING.md README.txt youtube-dl.1 youtube-dl.bash-completion youtube-dl.zsh youtube-dl.fish supportedsites
clean:
- rm -rf youtube-dl.1.temp.md youtube-dl.1 youtube-dl.bash-completion README.txt MANIFEST build/ dist/ .coverage cover/ youtube-dl.tar.gz youtube-dl.zsh youtube-dl.fish *.dump *.part *.info.json *.mp4 *.flv *.mp3 *.avi CONTRIBUTING.md.tmp ISSUE_TEMPLATE.md.tmp youtube-dl youtube-dl.exe
+ rm -rf youtube-dl.1.temp.md youtube-dl.1 youtube-dl.bash-completion README.txt MANIFEST build/ dist/ .coverage cover/ youtube-dl.tar.gz youtube-dl.zsh youtube-dl.fish youtube_dl/extractor/lazy_extractors.py *.dump *.part *.info.json *.mp4 *.flv *.mp3 *.avi CONTRIBUTING.md.tmp ISSUE_TEMPLATE.md.tmp youtube-dl youtube-dl.exe
find . -name "*.pyc" -delete
find . -name "*.class" -delete
@@ -88,6 +88,12 @@ youtube-dl.fish: youtube_dl/*.py youtube_dl/*/*.py devscripts/fish-completion.in
fish-completion: youtube-dl.fish
+lazy-extractors: youtube_dl/extractor/lazy_extractors.py
+
+_EXTRACTOR_FILES != find youtube_dl/extractor -iname '*.py' -and -not -iname 'lazy_extractors.py'
+youtube_dl/extractor/lazy_extractors.py: devscripts/make_lazy_extractors.py devscripts/lazy_load_template.py $(_EXTRACTOR_FILES)
+ $(PYTHON) devscripts/make_lazy_extractors.py $@
+
youtube-dl.tar.gz: youtube-dl README.md README.txt youtube-dl.1 youtube-dl.bash-completion youtube-dl.zsh youtube-dl.fish
@tar -czf youtube-dl.tar.gz --transform "s|^|youtube-dl/|" --owner 0 --group 0 \
--exclude '*.DS_Store' \
diff --git a/devscripts/lazy_load_template.py b/devscripts/lazy_load_template.py
new file mode 100644
index 000000000..ae2bd2701
--- /dev/null
+++ b/devscripts/lazy_load_template.py
@@ -0,0 +1,17 @@
+# flake8: noqa
+from __future__ import unicode_literals
+
+import re
+
+
+class LazyLoadExtractor(object):
+ _module = None
+
+ @classmethod
+ def ie_key(cls):
+ return cls.__name__[:-2]
+
+ def __new__(cls):
+ mod = __import__(cls._module, fromlist=(cls.__name__,))
+ real_cls = getattr(mod, cls.__name__)
+ return real_cls.__new__(real_cls)
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)
diff --git a/youtube_dl/extractor/__init__.py b/youtube_dl/extractor/__init__.py
index a0a53445a..b0d4d156b 100644
--- a/youtube_dl/extractor/__init__.py
+++ b/youtube_dl/extractor/__init__.py
@@ -1,13 +1,17 @@
from __future__ import unicode_literals
-from .extractors import *
-
-_ALL_CLASSES = [
- klass
- for name, klass in globals().items()
- if name.endswith('IE') and name != 'GenericIE'
-]
-_ALL_CLASSES.append(GenericIE)
+try:
+ from .lazy_extractors import *
+ from .lazy_extractors import _ALL_CLASSES
+except ImportError:
+ from .extractors import *
+
+ _ALL_CLASSES = [
+ klass
+ for name, klass in globals().items()
+ if name.endswith('IE') and name != 'GenericIE'
+ ]
+ _ALL_CLASSES.append(GenericIE)
def gen_extractor_classes():