working argparse based CLI with most commands implemented

archivebox/cli/__init__.py

@@ -0,0 +1,27 @@
+__package__ = 'archivebox.cli'
+
+import os
+from importlib import import_module
+
+CLI_DIR = os.path.dirname(os.path.abspath(__file__))
+
+required_attrs = ('__package__', '__command__', '__description__', 'main')
+
+
+def list_subcommands():
+    COMMANDS = {}
+    for filename in os.listdir(CLI_DIR):
+        if filename.startswith('archivebox_') and filename.endswith('.py'):
+            subcommand = filename.replace('archivebox_', '').replace('.py', '')
+            module = import_module('.archivebox_{}'.format(subcommand), __package__)
+
+            assert all(hasattr(module, attr) for attr in required_attrs)
+            assert module.__command__.split(' ')[-1] == subcommand
+            COMMANDS[subcommand] = module.__description__
+
+    return COMMANDS
+
+
+def run_subcommand(subcommand: str, args=None):
+    module = import_module('.archivebox_{}'.format(subcommand), __package__)
+    return module.main(args)    # type: ignore