Added logic to add CLI commands from external packages

src/cpl_cli/main.py

@@ -1,15 +1,52 @@
-from cpl_cli.startup_argument_extension import StartupArgumentExtension
-from cpl_core.application.application_builder import ApplicationBuilder
+from typing import Type
+
+import pkg_resources
+
 from cpl_cli.cli import CLI
 from cpl_cli.startup import Startup
+from cpl_cli.startup_argument_extension import StartupArgumentExtension
+from cpl_core.application.application_builder import ApplicationBuilder
+from cpl_core.application.startup_extension_abc import StartupExtensionABC
+
+
+def get_startup_extensions() -> list[Type[StartupExtensionABC]]:
+    blacklisted_packages = ['cpl-cli']
+    startup_extensions = []
+
+    installed_packages = pkg_resources.working_set
+    for p in installed_packages:
+        package = str(p).split(' ')[0]
+        if not package.startswith('cpl-') or package in blacklisted_packages:
+            continue
+
+        package = package.replace('-', '_')
+        loaded_package = __import__(package)
+        if '__cli_startup_extension__' not in dir(loaded_package):
+            continue
+        startup_extensions.append(loaded_package.__cli_startup_extension__)
+
+    return startup_extensions
 
 
 def main():
     app_builder = ApplicationBuilder(CLI)
     app_builder.use_startup(Startup)
     app_builder.use_extension(StartupArgumentExtension)
+    for extension in get_startup_extensions():
+        app_builder.use_extension(extension)
+
     app_builder.build().run()
 
 
 if __name__ == '__main__':
     main()
+
+#           ((
+#           ( `)
+#           ; / ,
+#          /  \/
+#         /  |
+#        /  ~/
+#       / )  )   ~ edraft
+#   ___// | /
+#   `--'  \_~-,