bots: Indicate source of bot (from source/module/registry) upon startup.

Amend tests to include new parameter.

zulip_bots/zulip_bots/finder.py

@@ -32,7 +32,7 @@ class DuplicateRegisteredBotName(Exception):
     pass
 
 
-def import_module_from_zulip_bot_registry(name: str) -> Optional[ModuleType]:
+def import_module_from_zulip_bot_registry(name: str) -> Tuple[str, Optional[ModuleType]]:
     # Prior to Python 3.10, calling importlib.metadata.entry_points returns a
     # SelectableGroups object when no parameters is given. Currently we use
     # the importlib_metadata library for compatibility, but we need to migrate
@@ -42,12 +42,38 @@ def import_module_from_zulip_bot_registry(name: str) -> Optional[ModuleType]:
     matching_bots = [bot for bot in registered_bots if bot.name == name]
 
     if len(matching_bots) == 1:  # Unique matching entrypoint
-        return matching_bots[0].load()
+        """We expect external bots to be registered using entry_points in the
+        group "zulip_bots.registry", where the name of the entry point should
+        match the name of the module containing the bot handler and the value
+        of it should be the package containing the bot handler module.
+
+        E.g, an Python package for a bot called "packaged_bot" should have an
+        `entry_points` setup like the following:
+
+        setup(
+            ...
+            entry_points={
+                "zulip_bots.registry":[
+                    "packaged_bot=packaged_bot.packaged_bot"
+                ]
+            }
+            ...
+        )
+        """
+        bot = matching_bots[0]
+        bot_name = bot.name
+        bot_module = bot.load()
+        bot_version = bot_module.__version__
+
+        if bot_version is not None:
+            return f"{bot_name}: {bot_version}", bot_module
+        else:
+            return f"editable package: {bot_name}", bot_module
 
     if len(matching_bots) > 1:
         raise DuplicateRegisteredBotName(name)
 
-    return None  # no matches in registry
+    return "", None  # no matches in registry
 
 
 def resolve_bot_path(name: str) -> Optional[Tuple[Path, str]]:

zulip_bots/zulip_bots/lib.py

@@ -443,6 +443,7 @@ def run_message_handler_for_bot(
     config_file: str,
     bot_config_file: str,
     bot_name: str,
+    bot_source: str,
 ) -> Any:
     """
     lib_module is of type Any, since it can contain any bot's
@@ -473,7 +474,7 @@ def run_message_handler_for_bot(
     message_handler = prepare_message_handler(bot_name, restricted_client, lib_module)
 
     if not quiet:
-        print("Running {} Bot:".format(bot_details["name"]))
+        print("Running {} Bot (from {}):".format(bot_details["name"], bot_source))
         if bot_details["description"] != "":
             print("\n\t{}".format(bot_details["description"]))
         if hasattr(message_handler, "usage"):

zulip_bots/zulip_bots/run.py

@@ -118,7 +118,7 @@ def main() -> None:
 
     if args.registry:
         try:
-            lib_module = finder.import_module_from_zulip_bot_registry(args.bot)
+            bot_source, lib_module = finder.import_module_from_zulip_bot_registry(args.bot)
         except finder.DuplicateRegisteredBotName as error:
             print(
                 f'ERROR: Found duplicate entries for "{error}" in zulip bots registry.\n'
@@ -151,10 +151,12 @@ def main() -> None:
                 )
                 print(dep_err_msg.format(bot_name=bot_name, deps_list=deps_list))
                 sys.exit(1)
+            bot_source = "source"
         else:
             lib_module = finder.import_module_by_name(args.bot)
             if lib_module:
                 bot_name = lib_module.__name__
+                bot_source = "named module"
                 if args.provision:
                     print("ERROR: Could not load bot's module for '{}'. Exiting now.")
                     sys.exit(1)
@@ -179,6 +181,7 @@ def main() -> None:
             bot_config_file=args.bot_config_file,
             quiet=args.quiet,
             bot_name=bot_name,
+            bot_source=bot_source,
         )
     except NoBotConfigException:
         print(

zulip_bots/zulip_bots/tests/test_lib.py

@@ -197,6 +197,7 @@ class LibTest(TestCase):
                 config_file=None,
                 bot_config_file=None,
                 bot_name="testbot",
+                bot_source="bot code location",
             )
 
     def test_upload_file(self):

zulip_bots/zulip_bots/tests/test_run.py

@@ -2,13 +2,13 @@
 import os
 import sys
 import unittest
-from importlib.metadata import EntryPoint
 from pathlib import Path
 from typing import Optional
 from unittest import TestCase, mock
-from unittest.mock import patch
+from unittest.mock import MagicMock, patch
 
 import zulip_bots.run
+from zulip_bots.finder import metadata
 from zulip_bots.lib import extract_query_without_mention
 
 
@@ -16,7 +16,10 @@ class TestDefaultArguments(TestCase):
 
     our_dir = os.path.dirname(__file__)
     path_to_bot = os.path.abspath(os.path.join(our_dir, "../bots/giphy/giphy.py"))
-    packaged_bot_entrypoint = EntryPoint("packaged_bot", "module_name", "zulip_bots.registry")
+    packaged_bot_module = MagicMock(__version__="1.0.0")
+    packaged_bot_entrypoint = metadata.EntryPoint(
+        "packaged_bot", "module_name", "zulip_bots.registry"
+    )
 
     @patch("sys.argv", ["zulip-run-bot", "giphy", "--config-file", "/foo/bar/baz.conf"])
     @patch("zulip_bots.run.run_message_handler_for_bot")
@@ -31,6 +34,7 @@ class TestDefaultArguments(TestCase):
             config_file="/foo/bar/baz.conf",
             bot_config_file=None,
             lib_module=mock.ANY,
+            bot_source="source",
             quiet=False,
         )
 
@@ -47,6 +51,7 @@ class TestDefaultArguments(TestCase):
             config_file="/foo/bar/baz.conf",
             bot_config_file=None,
             lib_module=mock.ANY,
+            bot_source="source",
             quiet=False,
         )
 
@@ -58,7 +63,8 @@ class TestDefaultArguments(TestCase):
         self, mock_run_message_handler_for_bot: mock.Mock
     ) -> None:
         with patch("zulip_bots.run.exit_gracefully_if_zulip_config_is_missing"), patch(
-            "zulip_bots.finder.metadata.EntryPoint.load"
+            "zulip_bots.finder.metadata.EntryPoint.load",
+            return_value=self.packaged_bot_module,
         ), patch(
             "zulip_bots.finder.metadata.entry_points",
             return_value=(self.packaged_bot_entrypoint,),
@@ -70,6 +76,7 @@ class TestDefaultArguments(TestCase):
             config_file="/foo/bar/baz.conf",
             bot_config_file=None,
             lib_module=mock.ANY,
+            bot_source="packaged_bot: 1.0.0",
             quiet=False,
         )