PY-77993 drop legacy pkg_resources-style namespace package declarations

(cherry picked from commit 953ecce0b4f80ecd176f3f867aeed90324e8420e)

IJ-MR-166981

GitOrigin-RevId: a7522b79c0fec5d363453d0875b9529b7f232e3b

python/helpers/pydev/pydev_tests_python/my_extensions/pydevd_plugins/__init__.py

@@ -1,5 +1,2 @@
-try:
-    __import__('pkg_resources').declare_namespace(__name__)
-except ImportError:
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)

python/helpers/pydev/pydev_tests_python/my_extensions/pydevd_plugins/extensions/__init__.py

@@ -1,5 +1,2 @@
-try:
-    __import__('pkg_resources').declare_namespace(__name__)
-except ImportError:
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)

python/helpers/pydev/pydev_tests_python/test_pydevd_extension_utils.py

@@ -0,0 +1,24 @@
+import os
+
+import pytest
+
+
+@pytest.fixture
+def with_my_extensions(monkeypatch):
+    my_extensions_path = os.path.join(os.path.dirname(__file__), "my_extensions")
+    monkeypatch.syspath_prepend(my_extensions_path)
+
+
+def test_could_load_extensions(with_my_extensions):
+    from _pydevd_bundle.pydevd_extension_utils import ExtensionManager
+
+    em = ExtensionManager()
+    em._load_modules()
+
+    expected_modules = [
+        'pydevd_plugins.extensions.pydevd_plugin_test_events',
+        'pydevd_plugins.extensions.pydevd_plugin_test_exttype',
+        'pydevd_plugins.extensions.types.pydevd_plugin_numpy_types',
+        'pydevd_plugins.extensions.types.pydevd_plugins_django_form_str',
+    ]
+    assert [m.__name__ for m in em.loaded_extensions] == expected_modules

python/helpers/pydev/pydevd_plugins/__init__.py

@@ -1,5 +1,2 @@
-try:
-    __import__('pkg_resources').declare_namespace(__name__)
-except:
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)

python/helpers/pydev/pydevd_plugins/extensions/README.md

@@ -1,25 +1,25 @@
-Extensions allow extending the debugger without modifying the debugger code. This is implemented with explicit namespace
-packages.
+Extensions allow extending the debugger without modifying the debugger code.
+This is implemented with explicit namespace packages.
 
-To implement your own extension:
+To implement your own extension ...
 
-1. Ensure that the root folder of your extension is in sys.path (add it to PYTHONPATH) 
+1. Ensure that the root folder of your extension is in `sys.path` (add it to `PYTHONPATH`) 
 2. Ensure that your module follows the directory structure below
-3. The ``__init__.py`` files inside the pydevd_plugin and extension folder must contain the preamble below,
-and nothing else.
-Preamble: 
+3. The `__init__.py` files inside the pydevd_plugin and extension folder must contain the preamble below,
+   and nothing else
+4. Your plugin name inside the extensions folder must start with `pydevd_plugin`
+5. Implement one or more of the abstract base classes defined in `_pydevd_bundle.pydevd_extension_api`,
+   this can be done by either inheriting from them or registering with the abstract base class
+
+# Preamble
+
 ```python
-try:
-    __import__('pkg_resources').declare_namespace(__name__)
-except ImportError:
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)
 ```
-4. Your plugin name inside the extensions folder must start with `"pydevd_plugin"`
-5. Implement one or more of the abstract base classes defined in `_pydevd_bundle.pydevd_extension_api`. This can be done
-by either inheriting from them or registering with the abstract base class.
+
+# Directory Structure
 
-* Directory structure:
 ```
 |--  root_directory-> must be on python path
 |    |-- pydevd_plugins
@@ -27,4 +27,4 @@ by either inheriting from them or registering with the abstract base class.
 |    |   |-- extensions
 |    |   |   |-- __init__.py -> must contain preamble
 |    |   |   |-- pydevd_plugin_plugin_name.py
-```
+```

python/helpers/pydev/pydevd_plugins/extensions/__init__.py

@@ -1,5 +1,2 @@
-try:
-    __import__('pkg_resources').declare_namespace(__name__)
-except:
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)

python/helpers/pydev/pydevd_plugins/extensions/types/README.md

@@ -1,30 +0,0 @@
-Extensions allow extending the debugger without modifying the debugger code. This is implemented with explicit namespace
-packages.
-
-To implement your own extension:
-
-1. Ensure that the root folder of your extension is in sys.path (add it to PYTHONPATH) 
-2. Ensure that your module follows the directory structure below
-3. The ``__init__.py`` files inside the pydevd_plugin and extension folder must contain the preamble below,
-and nothing else.
-Preamble: 
-```python
-try:
-    __import__('pkg_resources').declare_namespace(__name__)
-except ImportError:
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
-```
-4. Your plugin name inside the extensions folder must start with `"pydevd_plugin"`
-5. Implement one or more of the abstract base classes defined in `_pydevd_bundle.pydevd_extension_api`. This can be done
-by either inheriting from them or registering with the abstract base class.
-
-* Directory structure:
-```
-|--  root_directory-> must be on python path
-|    |-- pydevd_plugins
-|    |   |-- __init__.py -> must contain preamble
-|    |   |-- extensions
-|    |   |   |-- __init__.py -> must contain preamble
-|    |   |   |-- pydevd_plugin_plugin_name.py
-```

python/helpers/pydev/pydevd_plugins/extensions/types/__init__.py

@@ -1,5 +1,2 @@
-try:
-    __import__('pkg_resources').declare_namespace(__name__)
-except:
-    import pkgutil
-    __path__ = pkgutil.extend_path(__path__, __name__)
+import pkgutil
+__path__ = pkgutil.extend_path(__path__, __name__)