Support displaying choice lists in help

src/azure/cli/_help.py

@@ -78,6 +78,7 @@ def print_arguments(help_file):
     for p in sorted(help_file.parameters, key=lambda p: str(not p.required) + p.name):
         indent = 1
         required_text = required_tag if p.required else ''
+        p.short_summary = (p.short_summary if p.short_summary else '') + _get_choices_str(p)
         _print_indent('{0}{1}{2}{3}'.format(p.name,
                                             _get_column_indent(p.name + required_text,
                                                                max_name_length),
@@ -124,6 +125,14 @@ def _print_groups(help_file):
                       indent)
     _print_indent('')
 
+def _get_choices_str(p):
+    choice_str = ""
+    if p.choices:
+        choice_str = (' ' if p.short_summary else '') \
+            + '[{}{}]'.format(', '.join(p.choices),
+                              ('; default: ' + p.default) if p.default else '')
+    return choice_str
+
 def _print_examples(help_file):
     indent = 0
     _print_indent(L('Examples'), indent)
@@ -204,7 +213,9 @@ def __init__(self, delimiters, parser):
         for action in [a for a in parser._actions if a.help != argparse.SUPPRESS]: # pylint: disable=protected-access
             self.parameters.append(HelpParameter(' '.join(sorted(action.option_strings)),
                                                  action.help,
-                                                 required=action.required))
+                                                 required=action.required,
+                                                 choices=action.choices,
+                                                 default=action.default))
 
     def _load_from_data(self, data):
         super(CommandHelpFile, self)._load_from_data(data)
@@ -228,14 +239,16 @@ def _load_from_data(self, data):
         self.parameters = loaded_params
 
 
-class HelpParameter(object): #pylint: disable=too-few-public-methods
-    def __init__(self, param_name, description, required):
+class HelpParameter(object): #pylint: disable=too-few-public-methods, too-many-instance-attributes
+    def __init__(self, param_name, description, required, choices=None, default=None): #pylint: disable=too-many-arguments
         self.name = param_name
         self.required = required
         self.type = 'string'
         self.short_summary = description
         self.long_summary = ''
         self.value_sources = []
+        self.choices = choices
+        self.default = default
 
     def update_from_data(self, data):
         if self.name != data.get('name'):

src/azure/cli/application.py

@@ -138,7 +138,8 @@ def _register_builtin_arguments(parser):
         parser.add_argument('--subscription', dest='_subscription_id', help=argparse.SUPPRESS)
         parser.add_argument('--output', '-o', dest='_output_format',
                             choices=['list', 'json', 'tsv'],
-                            help='Output format of type "list", "json" or "tsv"')
+                            default='list',
+                            help='Output format')
         # The arguments for verbosity don't get parsed by argparse but we add it here for help.
         parser.add_argument('--verbose', dest='_log_verbosity_verbose',
                             help='Increase logging verbosity. Use --debug for full debug logs.')

src/command_modules/azure-cli-storage/azure/cli/command_modules/storage/__init__.py

@@ -301,7 +301,7 @@ def exists_container(args):
 @command_table.option(**PARAMETER_ALIASES['container_name'])
 @command_table.option(**PARAMETER_ALIASES['blob_name'])
 @command_table.option('--type', required=True, choices=blob_types.keys(),
-                      help=L('type of blob to upload ({})'.format(blob_types_str)))
+                      help=L('type of blob to upload'))
 @command_table.option('--upload-from', required=True,
                       help=L('local path to upload from'))
 @command_table.option_set(STORAGE_DATA_CLIENT_ARGS)