Remove extensions mechanism (#5895)

* Remove extensions mechanism.

* Missing change.

bin/bundle-extensions

@@ -1,126 +0,0 @@
-#!/usr/bin/env python3
-"""Copy bundle extension files to the client/app/extension directory"""
-import logging
-import os
-from pathlib import Path
-from shutil import copy
-from collections import OrderedDict as odict
-
-import importlib_metadata
-import importlib_resources
-
-# Name of the subdirectory
-BUNDLE_DIRECTORY = "bundle"
-
-logger = logging.getLogger(__name__)
-
-
-# Make a directory for extensions and set it as an environment variable
-# to be picked up by webpack.
-extensions_relative_path = Path("client", "app", "extensions")
-extensions_directory = Path(__file__).parent.parent / extensions_relative_path
-
-if not extensions_directory.exists():
-    extensions_directory.mkdir()
-os.environ["EXTENSIONS_DIRECTORY"] = str(extensions_relative_path)
-
-
-def entry_point_module(entry_point):
-    """Returns the dotted module path for the given entry point"""
-    return entry_point.pattern.match(entry_point.value).group("module")
-
-
-def load_bundles():
-    """"Load bundles as defined in Redash extensions.
-
-    The bundle entry point can be defined as a dotted path to a module
-    or a callable, but it won't be called but just used as a means
-    to find the files under its file system path.
-
-    The name of the directory it looks for files in is "bundle".
-
-    So a Python package with an extension bundle could look like this::
-
-        my_extensions/
-        ├── __init__.py
-        └── wide_footer
-            ├── __init__.py
-            └── bundle
-                ├── extension.js
-                └── styles.css
-
-    and would then need to register the bundle with an entry point
-    under the "redash.bundles" group, e.g. in your setup.py::
-
-        setup(
-            # ...
-            entry_points={
-                "redash.bundles": [
-                    "wide_footer = my_extensions.wide_footer",
-                ]
-                # ...
-            },
-            # ...
-        )
-
-    """
-    bundles = odict()
-    # HACK:
-    #   bin/bundle-extensions is tested in different versions.
-    #   circleci frontend-unit-tests: python 3.5 and importlib-metadata-2.1.3
-    #   circleci backend-unit-tests: python 3.7 and importlib-metadata-5.0.0
-    if importlib_metadata.version("importlib_metadata") >= "5.0.0":
-        bundles_entry_points = importlib_metadata.entry_points(group="redash.bundles")
-    else:
-        bundles_entry_points = importlib_metadata.entry_points().get(
-            "redash.bundles", []
-        )
-
-    for entry_point in bundles_entry_points:
-        logger.info('Loading Redash bundle "%s".', entry_point.name)
-        module = entry_point_module(entry_point)
-        # Try to get a list of bundle files
-        try:
-            bundle_dir = importlib_resources.files(module).joinpath(BUNDLE_DIRECTORY)
-        except (ImportError, TypeError):
-            # Module isn't a package, so can't have a subdirectory/-package
-            logger.error(
-                'Redash bundle module "%s" could not be imported: "%s"',
-                entry_point.name,
-                module,
-            )
-            continue
-        if not bundle_dir.is_dir():
-            logger.error(
-                'Redash bundle directory "%s" could not be found or is not a directory: "%s"',
-                entry_point.name,
-                bundle_dir,
-            )
-            continue
-        bundles[entry_point.name] = list(bundle_dir.rglob("*"))
-    return bundles
-
-
-bundles = load_bundles().items()
-if bundles:
-    print("Number of extension bundles found: {}".format(len(bundles)))
-else:
-    print("No extension bundles found.")
-
-for bundle_name, paths in bundles:
-    # Shortcut in case not paths were found for the bundle
-    if not paths:
-        print('No paths found for bundle "{}".'.format(bundle_name))
-        continue
-
-    # The destination for the bundle files with the entry point name as the subdirectory
-    destination = Path(extensions_directory, bundle_name)
-    if not destination.exists():
-        destination.mkdir()
-
-    # Copy the bundle directory from the module to its destination.
-    print('Copying "{}" bundle to {}:'.format(bundle_name, destination.resolve()))
-    for src_path in paths:
-        dest_path = destination / src_path.name
-        print(" - {} -> {}".format(src_path, dest_path))
-        copy(str(src_path), str(dest_path))