fix: remove pkg_resources for python 3.12 compatibility

pkg_resources is available in python 3.12 only if setuptools is
explicitely installed, which is not always the case. We fix that by
replacing all usage of pkg_resources with importlib_resources and
importlib_metadata.

Close #966

changelog.d/20240202_153925_danyal.faheem_remove_pkg_resources.md

@@ -0,0 +1 @@
+[Depreciation] Replace pkg_resources with importlib_metadata and importlib_resources. (by @Danyal-Faheem)

requirements/base.in

@@ -6,3 +6,5 @@ mypy
 pycryptodome>=3.17.0
 pyyaml>=6.0
 typing-extensions>=4.4.0
+importlib-metadata>=7.0.1
+importlib-resources>=6.1.1

requirements/base.txt

@@ -20,6 +20,10 @@ google-auth==2.23.3
     # via kubernetes
 idna==3.4
     # via requests
+importlib-metadata==7.0.1
+    # via -r requirements/base.in
+importlib-resources==6.1.1
+    # via -r requirements/base.in
 jinja2==3.1.3
     # via -r requirements/base.in
 kubernetes==28.1.0
@@ -72,3 +76,7 @@ urllib3==1.26.18
     #   requests
 websocket-client==1.6.4
     # via kubernetes
+zipp==3.17.0
+    # via
+    #   importlib-metadata
+    #   importlib-resources

requirements/dev.txt

@@ -58,14 +58,17 @@ idna==3.4
     # via
     #   -r requirements/base.txt
     #   requests
-importlib-metadata==6.8.0
+importlib-metadata==7.0.1
     # via
+    #   -r requirements/base.txt
     #   build
     #   keyring
     #   pyinstaller
     #   twine
 importlib-resources==6.1.1
-    # via keyring
+    # via
+    #   -r requirements/base.txt
+    #   keyring
 isort==5.12.0
     # via pylint
 jaraco-classes==3.3.0
@@ -232,6 +235,7 @@ wheel==0.41.2
     # via pip-tools
 zipp==3.17.0
     # via
+    #   -r requirements/base.txt
     #   importlib-metadata
     #   importlib-resources
 

requirements/docs.txt

@@ -42,8 +42,12 @@ idna==3.4
     #   requests
 imagesize==1.4.1
     # via sphinx
-importlib-metadata==6.8.0
-    # via sphinx
+importlib-metadata==7.0.1
+    # via
+    #   -r requirements/base.txt
+    #   sphinx
+importlib-resources==6.1.1
+    # via -r requirements/base.txt
 jinja2==3.1.3
     # via
     #   -r requirements/base.txt
@@ -153,4 +157,7 @@ websocket-client==1.6.4
     #   -r requirements/base.txt
     #   kubernetes
 zipp==3.17.0
-    # via importlib-metadata
+    # via
+    #   -r requirements/base.txt
+    #   importlib-metadata
+    #   importlib-resources

tutor.spec

@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 import importlib
 import os
-import pkg_resources
+from importlib_metadata
 
 block_cipher = None
 
@@ -10,10 +10,10 @@ hidden_imports = []
 
 # Auto-discover plugins and include patches & templates folders
 for entrypoint_version in ["tutor.plugin.v0", "tutor.plugin.v1"]:
-    for entrypoint in pkg_resources.iter_entry_points(entrypoint_version):
+    for entrypoint in importlib_metadata.entry_points(group=entrypoint_version):
         plugin_name = entrypoint.name
         try:
-            plugin = entrypoint.load()
+            plugin = importlib.import_module(entrypoint.value)
         except Exception as e:
             print(f"ERROR Failed to load plugin {plugin_name}: {e}")
             continue

tutor/env.py

@@ -7,13 +7,13 @@ import typing as t
 from copy import deepcopy
 
 import jinja2
-import pkg_resources
+import importlib_resources
 
 from tutor import exceptions, fmt, hooks, plugins, utils
 from tutor.__about__ import __app__, __version__
 from tutor.types import Config, ConfigValue
 
-TEMPLATES_ROOT = pkg_resources.resource_filename("tutor", "templates")
+TEMPLATES_ROOT = str(importlib_resources.files("tutor") / "templates")
 VERSION_FILENAME = "version"
 BIN_FILE_EXTENSIONS = [
     ".ico",

tutor/plugins/v0.py

@@ -5,7 +5,7 @@ import typing as t
 from glob import glob
 
 import click
-import pkg_resources
+import importlib_metadata
 
 from tutor import env, exceptions, fmt, hooks, serialize
 from tutor.__about__ import __app__
@@ -246,12 +246,12 @@ class EntrypointPlugin(BasePlugin):
 
     ENTRYPOINT = "tutor.plugin.v0"
 
-    def __init__(self, entrypoint: pkg_resources.EntryPoint) -> None:
-        self.loader: pkg_resources.EntryPoint
+    def __init__(self, entrypoint: importlib_metadata.EntryPoint) -> None:
+        self.loader: importlib_metadata.EntryPoint = entrypoint
         super().__init__(entrypoint.name, entrypoint)
 
     def _load_obj(self) -> None:
-        self.obj = self.loader.load()
+        self.obj = importlib.import_module(self.loader.value)
 
     def _version(self) -> t.Optional[str]:
         if not self.loader.dist:
@@ -260,12 +260,11 @@ class EntrypointPlugin(BasePlugin):
 
     @classmethod
     def discover_all(cls) -> None:
-        for entrypoint in pkg_resources.iter_entry_points(cls.ENTRYPOINT):
+        entrypoints = importlib_metadata.entry_points(group=cls.ENTRYPOINT)
+        for entrypoint in entrypoints:
             try:
                 error: t.Optional[str] = None
                 cls(entrypoint)
-            except pkg_resources.VersionConflict as e:
-                error = e.report()
             except Exception as e:  # pylint: disable=broad-except
                 error = str(e)
             if error:

tutor/plugins/v1.py

@@ -2,7 +2,7 @@ import importlib.util
 import os
 from glob import glob
 
-import pkg_resources
+import importlib_metadata
 
 from tutor import hooks
 
@@ -26,7 +26,7 @@ def _discover_entrypoint_plugins() -> None:
     """
     with hooks.Contexts.PLUGINS.enter():
         if "TUTOR_IGNORE_ENTRYPOINT_PLUGINS" not in os.environ:
-            for entrypoint in pkg_resources.iter_entry_points("tutor.plugin.v1"):
+            for entrypoint in importlib_metadata.entry_points(group="tutor.plugin.v1"):
                 discover_package(entrypoint)
 
 
@@ -56,7 +56,7 @@ def discover_module(path: str) -> None:
             spec.loader.exec_module(module)
 
 
-def discover_package(entrypoint: pkg_resources.EntryPoint) -> None:
+def discover_package(entrypoint: importlib_metadata.EntryPoint) -> None:
     """
     Install a plugin from a python package.
     """
@@ -68,10 +68,11 @@ def discover_package(entrypoint: pkg_resources.EntryPoint) -> None:
     # Add plugin information
     if entrypoint.dist is None:
         raise ValueError(f"Could not read plugin version: {name}")
-    hooks.Filters.PLUGINS_INFO.add_item((name, entrypoint.dist.version))
+    dist_version = entrypoint.dist.version if entrypoint.dist else "Unknown"
+    hooks.Filters.PLUGINS_INFO.add_item((name, dist_version))
 
     # Import module on enable
     @hooks.Actions.PLUGIN_LOADED.add()
     def load(plugin_name: str) -> None:
         if name == plugin_name:
-            entrypoint.load()
+            importlib.import_module(entrypoint.value)