added tabbed output

azure-cli.pyproj

@@ -14,7 +14,7 @@
     <LaunchProvider>Standard Python launcher</LaunchProvider>
     <InterpreterId>{12627503-1b89-4332-94a5-8ddd298e66ac}</InterpreterId>
     <InterpreterVersion>3.5</InterpreterVersion>
-    <CommandLineArguments>login --help</CommandLineArguments>
+    <CommandLineArguments>account li</CommandLineArguments>
     <EnableNativeCodeDebugging>False</EnableNativeCodeDebugging>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)' == 'Debug'" />

src/azure/cli/_argparse.py

@@ -177,7 +177,10 @@ class ArgumentParser(object):
                 nouns.append(n.lower())
             except LookupError:
                 if '$args' not in m:
-                    show_usage = True
+                    #show_usage = True
+                    print(L('\nCommand "{0}" not found, names starting with "{0}":\n'.format(n)))
+                    args.append('--complete')
+                    show_completions = True
                 break
             n = next(it, '')
 
@@ -228,8 +231,8 @@ class ArgumentParser(object):
             try:
                 parsed[a]
             except KeyError:
-                print(L("Missing required argument {}".format(a)))
-                return ArgumentParserResult(self._display_usage(nouns, m, out))
+                print(L('Missing required argument "{}"'.format(a)))
+                return ArgumentParserResult("")
 
         try:
             output_format = others.pop('output') if others else None

src/azure/cli/_help.py

@@ -9,21 +9,31 @@ from ._output import OutputProducer, TableOutput, format_table, format_list, for
 def print_detailed_help(help_file, out=sys.stdout):  # TODO: wire up out to print statements
     indent = 0
     print('')
-    _printIndent('{0}{1}'.format(help_file.command, ': ' + help_file.short_summary if help_file.short_summary else ''), indent)
+    _printIndent('{0}{1}'.format(help_file.command, ': ' + help_file.short_summary
+                                 if help_file.short_summary
+                                 else ''), 
+                 indent)
 
     indent = 1
     _printIndent('{0}'.format(help_file.long_summary), indent)
     print('')
 
     indent = 0
-    _printIndent('Arguments' if help_file.type == 'command' else 'Sub-Commands', indent) 
+    _printIndent('Arguments'
+                 if help_file.type == 'command'
+                 else 'Sub-Commands', indent)
 
     if help_file.type == 'command':
         if len(help_file.parameters) == 0:
             _printIndent('none', indent)
+        max_name_length = max(len(p.name) for p in help_file.parameters)
         for p in help_file.parameters:
             indent = 1
-            _printIndent('{0}{1}'.format(p.name, ': ' + p.short_summary if p.short_summary else ''), indent)
+            _printIndent('{0}{1}{2}{3}'.format(p.name,
+                                            ' [Required]' if p.required else '',
+                                            get_column_indent(p.name, max_name_length),
+                                            ': ' + p.short_summary if p.short_summary else ''), 
+                         indent)
 
             indent = 2
             _printIndent('{0}'.format(p.long_summary), indent)
@@ -140,6 +150,9 @@ def _printIndent(str, indent=0):
     tw = textwrap.TextWrapper(initial_indent = "    "*indent, subsequent_indent = "    "*indent)
     print(tw.fill(str))
 
+def get_column_indent(text, max_name_length):
+    return ' '*(max_name_length - len(text))
+
 def _load_help_file(delimiters):
     s = """
     type: command