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Editing: autoclass.py

# -*- coding: utf-8 -*-
# Copyright 2021 Google LLC All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""This module provides the autoclass command to gsutil."""

from __future__ import absolute_import
from __future__ import print_function

import textwrap

from gslib import metrics
from gslib.command import Command
from gslib.command_argument import CommandArgument
from gslib.cs_api_map import ApiSelector
from gslib.exception import CommandException
from gslib.exception import NO_URLS_MATCHED_TARGET
from gslib.help_provider import CreateHelpText
from gslib.third_party.storage_apitools import storage_v1_messages as apitools_messages
from gslib.utils import text_util
from gslib.utils.constants import NO_MAX
from gslib.utils.shim_util import GcloudStorageMap
from gslib.utils import shim_util

_SET_SYNOPSIS = """
  gsutil autoclass set (on|off) gs://<bucket_name>...
"""

_GET_SYNOPSIS = """
  gsutil autoclass get gs://<bucket_name>...
"""

_SYNOPSIS = _SET_SYNOPSIS + _GET_SYNOPSIS.lstrip('\n')

_SET_DESCRIPTION = """
<B>SET</B>
  The ``set`` sub-command requires an additional sub-command, either ``on``
  or ``off``, which enables or disables Autoclass for the specified
  bucket(s).
"""

_GET_DESCRIPTION = """
<B>GET</B>
  The ``get`` sub-command gets the current Autoclass configuration for a
  bucket. The returned configuration has the following fields:

``enabled``: a boolean field indicating whether the feature is on or off.

``toggleTime``: a timestamp indicating when the enabled field was set.
"""

_DESCRIPTION = """
  The `Autoclass <https://cloud.google.com/storage/docs/autoclass>`_
  feature automatically selects the best storage class for objects based
  on access patterns. This command has two sub-commands, ``get`` and
  ``set``.
""" + _GET_DESCRIPTION + _SET_DESCRIPTION

_DETAILED_HELP_TEXT = CreateHelpText(_SYNOPSIS, _DESCRIPTION)
_set_help_text = CreateHelpText(_SET_SYNOPSIS, _SET_DESCRIPTION)
_get_help_text = CreateHelpText(_GET_SYNOPSIS, _GET_DESCRIPTION)

_GCLOUD_FORMAT_STRING = ('--format=value[separator="' +
                         shim_util.get_format_flag_newline() + '"](' +
                         'format("gs://{}:", name),' +
                         ' format("  Enabled: {}",' +
                         'autoclass.enabled.yesno(True, False)),' +
                         ' format("  Toggle Time: {}",' +
                         'autoclass.toggleTime))')

class AutoclassCommand(Command):
  """Implements the gsutil autoclass command."""

command_spec = Command.CreateCommandSpec(
      'autoclass',
      command_name_aliases=[],
      usage_synopsis=_SYNOPSIS,
      min_args=2,
      max_args=NO_MAX,
      supported_sub_args='',
      file_url_ok=False,
      provider_url_ok=False,
      urls_start_arg=2,
      gs_api_support=[ApiSelector.JSON],
      gs_default_api=ApiSelector.JSON,
      argparse_arguments={
          'get': [CommandArgument.MakeNCloudURLsArgument(1),],
          'set': [
              CommandArgument('mode', choices=['on', 'off']),
              CommandArgument.MakeZeroOrMoreCloudBucketURLsArgument()
          ],
      })
  # Help specification. See help_provider.py for documentation.
  help_spec = Command.HelpSpec(
      help_name='autoclass',
      help_name_aliases=[],
      help_type='command_help',
      help_one_line_summary='Configure Autoclass feature',
      help_text=_DETAILED_HELP_TEXT,
      subcommand_help_text={
          'get': _get_help_text,
          'set': _set_help_text,
      },
  )

gcloud_storage_map = GcloudStorageMap(
      gcloud_command={
          'get':
              GcloudStorageMap(
                  gcloud_command=[
                      'storage', 'buckets', 'list', _GCLOUD_FORMAT_STRING,
                      '--raw'
                  ],
                  flag_map={},
                  supports_output_translation=True,
              ),
          'set':
              GcloudStorageMap(
                  gcloud_command={
                      'on':
                          GcloudStorageMap(
                              gcloud_command=[
                                  'storage',
                                  'buckets',
                                  'update',
                                  '--enable-autoclass',
                              ],
                              flag_map={},
                          ),
                      'off':
                          GcloudStorageMap(
                              gcloud_command=[
                                  'storage',
                                  'buckets',
                                  'update',
                                  '--no-enable-autoclass',
                              ],
                              flag_map={},
                          ),
                  },
                  flag_map={},
              )
      },
      flag_map={},
  )

def _get_autoclass(self, blr):
    """Gets the autoclass setting for a bucket."""
    bucket_url = blr.storage_url

bucket_metadata = self.gsutil_api.GetBucket(bucket_url.bucket_name,
                                                fields=['autoclass'],
                                                provider=bucket_url.scheme)
    bucket = str(bucket_url).rstrip('/')
    if bucket_metadata.autoclass:
      enabled = getattr(bucket_metadata.autoclass, 'enabled', False)
      toggle_time = getattr(bucket_metadata.autoclass, 'toggleTime', None)
    else:
      enabled = False
      toggle_time = None
    print('{}:\n'
          '  Enabled: {}\n'
          '  Toggle Time: {}'.format(bucket, enabled, toggle_time))

def _set_autoclass(self, blr, setting_arg):
    """Turns autoclass on or off for a bucket."""
    bucket_url = blr.storage_url

autoclass_config = apitools_messages.Bucket.AutoclassValue()
    autoclass_config.enabled = (setting_arg == 'on')

bucket_metadata = apitools_messages.Bucket(autoclass=autoclass_config)

print('Setting Autoclass %s for %s' %
          (setting_arg, str(bucket_url).rstrip('/')))

self.gsutil_api.PatchBucket(bucket_url.bucket_name,
                                bucket_metadata,
                                fields=['autoclass'],
                                provider=bucket_url.scheme)
    return 0

def _autoclass(self):
    """Handles autoclass command on Cloud Storage buckets."""
    subcommand = self.args.pop(0)

if subcommand not in ('get', 'set'):
      raise CommandException('autoclass only supports get|set')

subcommand_func = None
    subcommand_args = []
    setting_arg = None

if subcommand == 'get':
      subcommand_func = self._get_autoclass
    elif subcommand == 'set':
      subcommand_func = self._set_autoclass
      setting_arg = self.args.pop(0)
      text_util.InsistOnOrOff(setting_arg,
                              'Only on and off values allowed for set option')
      subcommand_args.append(setting_arg)

if self.gsutil_api.GetApiSelector('gs') != ApiSelector.JSON:
      raise CommandException('\n'.join(
          textwrap.wrap(('The "%s" command can only be with the Cloud Storage '
                         'JSON API.') % self.command_name)))

# Iterate over bucket args, performing the specified subsubcommand.
    some_matched = False
    url_args = self.args
    if not url_args:
      self.RaiseWrongNumberOfArgumentsException()
    for url_str in url_args:
      # Throws a CommandException if the argument is not a bucket.
      bucket_iter = self.GetBucketUrlIterFromArg(url_str)
      for bucket_listing_ref in bucket_iter:
        if self.gsutil_api.GetApiSelector(
            bucket_listing_ref.storage_url.scheme) != ApiSelector.JSON:
          raise CommandException('\n'.join(
              textwrap.wrap(('The "%s" command can only be used for GCS '
                             'Buckets.') % self.command_name)))

some_matched = True
        subcommand_func(bucket_listing_ref, *subcommand_args)

if not some_matched:
      raise CommandException(NO_URLS_MATCHED_TARGET % list(url_args))
    return 0

def RunCommand(self):
    """Command entry point for the autoclass command."""
    action_subcommand = self.args[0]
    self.ParseSubOpts(check_args=True)

if action_subcommand == 'get' or action_subcommand == 'set':
      metrics.LogCommandParams(sub_opts=self.sub_opts)
      metrics.LogCommandParams(subcommands=[action_subcommand])
      return self._autoclass()
    else:
      raise CommandException('Invalid subcommand "%s", use get|set instead.' %
                             action_subcommand)

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