[Core] Allow disabling color

src/azure-cli-core/azure/cli/core/__init__.py

@@ -85,8 +85,8 @@ def get_cli_version(self):
 
     def show_version(self):
         from azure.cli.core.util import get_az_version_string
-        from azure.cli.core.commands.constants import SURVEY_PROMPT
-        import colorama
+        from azure.cli.core.commands.constants import SURVEY_PROMPT, SURVEY_PROMPT_COLOR
+
         ver_string, updates_available = get_az_version_string()
         print(ver_string)
         if updates_available == -1:
@@ -98,9 +98,7 @@ def show_version(self):
         else:
             print('Your CLI is up-to-date.')
 
-        colorama.init()  # This could be removed when knack fix is released
-        print('\n' + SURVEY_PROMPT)
-        colorama.deinit()  # This could be removed when knack fix is released
+        print('\n' + (SURVEY_PROMPT_COLOR if self.enable_color else SURVEY_PROMPT))
 
     def exception_handler(self, ex):  # pylint: disable=no-self-use
         from azure.cli.core.util import handle_exception
@@ -448,6 +446,7 @@ def command_group(self, group_name, command_type=None, **kwargs):
             kwargs['deprecate_info'].target = group_name
         if kwargs.get('is_preview', False):
             kwargs['preview_info'] = PreviewItem(
+                cli_ctx=self.cli_ctx,
                 target=group_name,
                 object_type='command group'
             )

src/azure-cli-core/azure/cli/core/_help.py

@@ -7,7 +7,7 @@
 import argparse
 
 from azure.cli.core.commands import ExtensionCommandSource
-from azure.cli.core.commands.constants import SURVEY_PROMPT
+from azure.cli.core.commands.constants import SURVEY_PROMPT, SURVEY_PROMPT_COLOR
 
 from knack.help import (HelpFile as KnackHelpFile, CommandHelpFile as KnackCommandHelpFile,
                         GroupHelpFile as KnackGroupHelpFile, ArgumentGroupRegistry as KnackArgumentGroupRegistry,
@@ -64,6 +64,7 @@ def _print_header(self, cli_name, help_file):
     def _print_detailed_help(self, cli_name, help_file):
         CLIPrintMixin._print_extensions_msg(help_file)
         super(CLIPrintMixin, self)._print_detailed_help(cli_name, help_file)
+        self._print_az_find_message(help_file.command, self.cli_ctx.enable_color)
 
     @staticmethod
     def _get_choices_defaults_sources_str(p):
@@ -75,7 +76,6 @@ def _get_choices_defaults_sources_str(p):
 
     @staticmethod
     def _print_examples(help_file):
-        from colorama import Style
         indent = 0
         _print_indent('Examples', indent)
         for e in help_file.examples:
@@ -86,9 +86,15 @@ def _print_examples(help_file):
                 _print_indent(u'{0}'.format(e.long_summary), indent)
             _print_indent(u'{0}'.format(e.command), indent)
             print('')
+
+    @staticmethod
+    def _print_az_find_message(command, enable_color):
+        from colorama import Style
         indent = 0
-        message = 'For more specific examples, use: az find "az {}"'.format(help_file.command)
-        _print_indent(Style.BRIGHT + message + Style.RESET_ALL + '\n', indent)
+        message = 'For more specific examples, use: az find "az {}"'.format(command)
+        if enable_color:
+            message = Style.BRIGHT + message + Style.RESET_ALL
+        _print_indent(message + '\n', indent)
 
     @staticmethod
     def _process_value_sources(p):
@@ -150,8 +156,6 @@ def new_normalize_text(s):
     def show_help(self, cli_name, nouns, parser, is_group):
         self.update_loaders_with_help_file_contents(nouns)
 
-        import colorama
-        colorama.init(autoreset=True)
         delimiters = ' '.join(nouns)
         help_file = self.command_help_cls(self, delimiters, parser) if not is_group \
             else self.group_help_cls(self, delimiters, parser)
@@ -162,7 +166,8 @@ def show_help(self, cli_name, nouns, parser, is_group):
             AzCliHelp.update_examples(help_file)
         self._print_detailed_help(cli_name, help_file)
 
-        print(SURVEY_PROMPT)
+        from colorama import Fore, Style
+        print(SURVEY_PROMPT_COLOR if self.cli_ctx.enable_color else SURVEY_PROMPT)
 
     def _register_help_loaders(self):
         import azure.cli.core._help_loaders as help_loaders

src/azure-cli-core/azure/cli/core/commands/__init__.py

@@ -686,8 +686,6 @@ def resolve_warnings(self, cmd, parsed_args):
         self._resolve_extension_override_warning(cmd)
 
     def _resolve_preview_and_deprecation_warnings(self, cmd, parsed_args):
-        import colorama
-
         deprecations = [] + getattr(parsed_args, '_argument_deprecations', [])
         if cmd.deprecate_info:
             deprecations.append(cmd.deprecate_info)
@@ -724,12 +722,10 @@ def _resolve_preview_and_deprecation_warnings(self, cmd, parsed_args):
                 del preview_kwargs['_get_message']
                 previews.append(ImplicitPreviewItem(**preview_kwargs))
 
-        colorama.init()
         for d in deprecations:
             print(d.message, file=sys.stderr)
         for p in previews:
             print(p.message, file=sys.stderr)
-        colorama.deinit()
 
     def _resolve_extension_override_warning(self, cmd):  # pylint: disable=no-self-use
         if isinstance(cmd.command_source, ExtensionCommandSource) and cmd.command_source.overrides_command:
@@ -864,12 +860,8 @@ def _generate_template_progress(self, correlation_id):  # pylint: disable=no-sel
                                 logger.info(result)
 
     def __call__(self, poller):
-        import colorama
         from msrest.exceptions import ClientException
 
-        # https://github.com/azure/azure-cli/issues/3555
-        colorama.init()
-
         correlation_message = ''
         self.cli_ctx.get_progress_controller().begin()
         correlation_id = None
@@ -910,7 +902,6 @@ def __call__(self, poller):
             handle_long_running_operation_exception(client_exception)
 
         self.cli_ctx.get_progress_controller().end()
-        colorama.deinit()
 
         return result
 

src/azure-cli-core/azure/cli/core/commands/constants.py

@@ -31,5 +31,6 @@
 
 BLACKLISTED_MODS = ['context', 'shell', 'documentdb', 'component']
 
-SURVEY_PROMPT = Fore.YELLOW + Style.BRIGHT + 'Please let us know how we are doing: ' + Fore.BLUE \
-    + 'https://aka.ms/clihats' + Style.RESET_ALL
+SURVEY_PROMPT = 'Please let us know how we are doing: https://aka.ms/clihats'
+SURVEY_PROMPT_COLOR = Fore.YELLOW + Style.BRIGHT + 'Please let us know how we are doing: ' + Fore.BLUE \
+                + 'https://aka.ms/clihats' + Style.RESET_ALL

src/azure-cli-core/azure/cli/core/extension/operations.py

@@ -77,8 +77,6 @@ def _validate_whl_extension(ext_file):
 
 
 def _add_whl_ext(cmd, source, ext_sha256=None, pip_extra_index_urls=None, pip_proxy=None):  # pylint: disable=too-many-statements
-    import colorama
-    colorama.init()  # Required for displaying the spinner correctly on windows issue #9140
     cmd.cli_ctx.get_progress_controller().add(message='Analyzing')
     if not source.endswith('.whl'):
         raise ValueError('Unknown extension type. Only Python wheels are supported.')
@@ -155,7 +153,6 @@ def _add_whl_ext(cmd, source, ext_sha256=None, pip_extra_index_urls=None, pip_pr
     dst = os.path.join(extension_path, whl_filename)
     shutil.copyfile(ext_file, dst)
     logger.debug('Saved the whl to %s', dst)
-    colorama.deinit()
 
 
 def is_valid_sha256sum(a_file, expected_sum):
@@ -201,10 +198,7 @@ def add_extension(cmd, source=None, extension_name=None, index_url=None, yes=Non
                   pip_extra_index_urls=None, pip_proxy=None):
     ext_sha256 = None
     if extension_name:
-        import colorama
-        colorama.init()  # Required for displaying the spinner correctly on windows issue #9140
         cmd.cli_ctx.get_progress_controller().add(message='Searching')
-        colorama.deinit()
         ext = None
         try:
             ext = get_extension(extension_name)