More helpful error message when failing to load BBOT module

bbot/core/helpers/depsinstaller/installer.py

@@ -16,6 +16,7 @@
 from ansible_runner.interface import run
 from subprocess import CalledProcessError
 
+from bbot import __version__
 from ..misc import can_sudo_without_password, os_platform, rm_at_exit, get_python_constraints
 
 log = logging.getLogger("bbot.core.helpers.depsinstaller")
@@ -174,6 +175,7 @@ async def install(self, *modules):
                     + self.venv
                     + str(self.parent_helper.bbot_home)
                     + os.uname()[1]
+                    + str(__version__)
                 ).hexdigest()
                 success = self.setup_status.get(module_hash, None)
                 dependencies = list(chain(*preloaded["deps"].values()))

bbot/core/modules.py

@@ -460,7 +460,12 @@ def preload_module(self, module_file):
     def load_modules(self, module_names):
         modules = {}
         for module_name in module_names:
-            module = self.load_module(module_name)
+            try:
+                module = self.load_module(module_name)
+            except ModuleNotFoundError as e:
+                raise BBOTError(
+                    f"Error loading module {module_name}: {e}. You may have leftover artifacts from an older version of BBOT. Try deleting/renaming your '~/.bbot' directory."
+                ) from e
             modules[module_name] = module
         return modules