main: Start unifying command handling

- Removes show_deps and show_config from commands module. These
  are now handled directly in the main() method pending subcommands.
- Unifies show_config with general main() config handling.
- Sets default verbosity level to zero.
- Reduce verbosity when --show-config or --show-deps is called.
- Update console logging to consider verbosity < 0 quiet/

mopidy/__main__.py

@@ -21,7 +21,7 @@ from mopidy import commands, ext
 from mopidy.audio import Audio
 from mopidy import config as config_lib
 from mopidy.core import Core
-from mopidy.utils import log, path, process
+from mopidy.utils import deps, log, path, process
 
 logger = logging.getLogger('mopidy.main')
 
@@ -33,10 +33,8 @@ def main():
     parser = commands.build_parser()
     args = parser.parse_args(args=mopidy_args)
 
-    if args.show_config:
-        commands.show_config(args)
-    if args.show_deps:
-        commands.show_deps()
+    if args.show_deps or args.show_config:
+        args.verbosity_level -= 1
 
     bootstrap_logging(args)
 
@@ -45,20 +43,40 @@ def main():
         check_old_locations()
 
         installed_extensions = ext.load_extensions()
-
         config, config_errors = config_lib.load(
             args.config_files, installed_extensions, args.config_overrides)
 
-        # Filter out disabled extensions and remove any config errors for them.
         enabled_extensions = []
         for extension in installed_extensions:
-            enabled = config[extension.ext_name]['enabled']
-            if ext.validate_extension(extension) and enabled:
+            if not ext.validate_extension(extension):
+                config[extension.ext_name] = {b'enabled': False}
+                config_errors[extension.ext_name] = {
+                    b'enabled': b'extension disabled by self check.'}
+            elif not config[extension.ext_name]['enabled']:
+                config[extension.ext_name] = {b'enabled': False}
+                config_errors[extension.ext_name] = {
+                    b'enabled': b'extension disabled by user config.'}
+            else:
                 enabled_extensions.append(extension)
-            elif extension.ext_name in config_errors:
-                del config_errors[extension.ext_name]
 
         log_extension_info(installed_extensions, enabled_extensions)
+
+        # TODO: move to 'mopidy config' and 'mopidy deps'
+        if args.show_config:
+            logger.info('Dumping sanitized user config and exiting.')
+            print config_lib.format(
+                config, installed_extensions, config_errors)
+            sys.exit(0)
+        if args.show_deps:
+            logger.info('Dumping debug info about dependencies and exiting.')
+            print deps.format_dependency_list()
+            sys.exit(0)
+
+        # Remove errors for extensions that are not enabled:
+        for extension in installed_extensions:
+            if extension not in enabled_extensions:
+                config_errors.pop(extension.ext_name, None)
+
         check_config_errors(config_errors)
 
         # Read-only config from here on, please.

mopidy/commands.py

@@ -1,10 +1,8 @@
 from __future__ import unicode_literals
 
 import argparse
-import sys
 
-from mopidy import config as config_lib, ext
-from mopidy.utils import deps, versioning
+from mopidy.utils import versioning
 
 
 def config_files_type(value):
@@ -23,6 +21,7 @@ def config_override_type(value):
 
 def build_parser():
     parser = argparse.ArgumentParser()
+    parser.set_defaults(verbosity_level=0)
     parser.add_argument(
         '--version', action='version',
         version='Mopidy %s' % versioning.get_version())
@@ -57,30 +56,3 @@ def build_parser():
         help='`section/key=value` values to override config options')
 
     return parser
-
-
-def show_config(args):
-    """Prints the effective config and exits."""
-    extensions = ext.load_extensions()
-    config, errors = config_lib.load(
-        args.config_files, extensions, args.config_overrides)
-
-    # Clear out any config for disabled extensions.
-    for extension in extensions:
-        if not ext.validate_extension(extension):
-            config[extension.ext_name] = {b'enabled': False}
-            errors[extension.ext_name] = {
-                b'enabled': b'extension disabled itself.'}
-        elif not config[extension.ext_name]['enabled']:
-            config[extension.ext_name] = {b'enabled': False}
-            errors[extension.ext_name] = {
-                b'enabled': b'extension disabled by config.'}
-
-    print config_lib.format(config, extensions, errors)
-    sys.exit(0)
-
-
-def show_deps():
-    """Prints a list of all dependencies and exits."""
-    print deps.format_dependency_list()
-    sys.exit(0)

mopidy/utils/log.py

@@ -34,7 +34,7 @@ def setup_root_logger():
 
 
 def setup_console_logging(config, verbosity_level):
-    if verbosity_level == -1:
+    if verbosity_level < 0:
         log_level = logging.WARNING
         log_format = config['logging']['console_format']
     elif verbosity_level >= 1: