setup: register the vault cli subcommand

also set the main command name to 'vault' so the main 'swh' cli tool
can generate shell completion properly.

setup.py

@@ -53,6 +53,8 @@ setup(
     entry_points='''
         [console_scripts]
         swh-vault=swh.vault.cli:main
+        [swh.cli.subcommands]
+        vault=swh.vault.cli:cli
     ''',
     classifiers=[
         "Programming Language :: Python :: 3",

swh/vault/cli.py

 import logging
+
 import click
 import aiohttp
 
@@ -8,13 +9,10 @@ from swh.vault.api.server import make_app_from_configfile
 CONTEXT_SETTINGS = dict(help_option_names=['-h', '--help'])
 
 
-@click.command(context_settings=CONTEXT_SETTINGS)
+@click.command(name='vault', context_settings=CONTEXT_SETTINGS)
 @click.option('--config-file', '-C', default=None,
               type=click.Path(exists=True, dir_okay=False,),
               help="Configuration file.")
-@click.option('--log-level', '-l', default='INFO',
-              type=click.Choice(logging._nameToLevel.keys()),
-              help="Log level (default to INFO)")
 @click.option('--no-stdout', is_flag=True, default=False,
               help="Do NOT output logs on the console")
 @click.option('--host', default='0.0.0.0', help="Host to run the server")
@@ -23,13 +21,15 @@ CONTEXT_SETTINGS = dict(help_option_names=['-h', '--help'])
 @click.option('--debug/--no-debug', default=True,
               help="Indicates if the server should run in debug mode")
 @click.pass_context
-def cli(ctx, config_file, log_level, no_stdout, host, port, debug):
+def cli(ctx, config_file, no_stdout, host, port, debug):
     """Software Heritage Vault API server
 
     """
     from swh.scheduler.celery_backend.config import setup_log_handler
-    log_level = setup_log_handler(
-        loglevel=log_level, colorize=False,
+
+    ctx.ensure_object(dict)
+    setup_log_handler(
+        loglevel=ctx.obj.get('log_level', logging.INFO), colorize=False,
         format='[%(levelname)s] %(name)s -- %(message)s',
         log_console=not no_stdout)
 
@@ -43,6 +43,7 @@ def cli(ctx, config_file, log_level, no_stdout, host, port, debug):
 
 
 def main():
+    logging.basicConfig()
     return cli(auto_envvar_prefix='SWH_VAULT')