[cli] Fix exporting of plugin interfaces

Signed-off-by: Ferdinand Thiessen <rpm@fthiessen.de>

flaschengeist/cli/export_cmd.py

@@ -1,4 +1,5 @@
 import click
+from importlib_metadata import entry_points
 
 
 @click.command()
@@ -8,14 +9,21 @@ import click
 @click.option("--no-core", help="Skip models / types from flaschengeist core", is_flag=True)
 def export(namespace, output, no_core, plugin):
     from flaschengeist import logger, models
-    from flaschengeist.app import get_plugins
     from .InterfaceGenerator import InterfaceGenerator
 
     gen = InterfaceGenerator(namespace, output, logger)
     if not no_core:
         gen.run(models)
     if plugin:
-        for plugin_class in get_plugins():
-            if (len(plugin) == 0 or plugin_class.id in plugin) and plugin_class.models is not None:
-                gen.run(plugin_class.models)
+        for entry_point in entry_points(group="flaschengeist.plugins"):
+            if len(plugin) == 0 or entry_point.name in plugin:
+                try:
+                    plugin = entry_point.load()
+                    gen.run(plugin.models)
+                except:
+                    logger.error(
+                        f"Plugin {entry_point.name} could not be loaded due to an error.",
+                        exc_info=True,
+                    )
+                    continue
     gen.write()