[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/gslib/addlhelp/command_opts.py

Index: third_party/gsutil/gslib/addlhelp/command_opts.py
diff --git a/third_party/gsutil/gslib/addlhelp/command_opts.py b/third_party/gsutil/gslib/addlhelp/command_opts.py
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+# -*- coding: utf-8 -*-
+# Copyright 2012 Google Inc. 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.
+"""Additional help about gsutil command-level options."""
+
+from __future__ import absolute_import
+
+from gslib.help_provider import HelpProvider
+
+_DETAILED_HELP_TEXT = ("""
+<B>SYNOPSIS</B>
+  Top-level gsutil Options
+
+
+<B>DESCRIPTION</B>
+  gsutil supports separate options for the top-level gsutil command and
+  the individual sub-commands (like cp, rm, etc.) The top-level options
+  control behavior of gsutil that apply across commands. For example, in
+  the command:
+
+    gsutil -m cp -p file gs://bucket/obj
+
+  the -m option applies to gsutil, while the -p option applies to the cp
+  sub-command.
+
+
+<B>OPTIONS</B>
+  -D          Shows HTTP requests/headers and additional debug info needed when
+              posting support requests.
+
+  -DD         Shows HTTP requests/headers, additional debug info plus HTTP
+              upstream payload.
+
+  -h          Allows you to specify certain HTTP headers, for example:
+
+                gsutil -h "Cache-Control:public,max-age=3600" \\
+                       -h "Content-Type:text/html" cp ...
+
+              Note that you need to quote the headers/values that
+              contain spaces (such as "Content-Disposition: attachment;
+              filename=filename.ext"), to avoid having the shell split them
+              into separate arguments.
+
+              The following headers are supported:
+              Cache-Control
+              Content-Disposition
+              Content-Encoding
+              Content-Language
+              Content-MD5
+              Content-Type
+              Custom metadata headers with a matching Cloud Storage Provider
+              prefix, such as:
+
+                x-goog-meta-
+
+              Note that for gs:// URLs, the Cache Control header is specific to
+              the API being used. The XML API will accept any cache control
+              headers and return them during object downloads.  The JSON API
+              respects only the public, private, no-cache, and max-age cache
+              control headers, and may add its own no-transform directive even
+              if it was not specified. See 'gsutil help apis' for more
+              information on gsutil's interaction with APIs.
+
+              See also "gsutil help setmeta" for the ability to set metadata
+              fields on objects after they have been uploaded.
+
+  -m          Causes supported operations (acl ch, acl set, cp, mv, rm, rsync,
+              and setmeta) to run in parallel. This can significantly improve
+              performance if you are performing operations on a large number of
+              files over a reasonably fast network connection.
+
+              gsutil performs the specified operation using a combination of
+              multi-threading and multi-processing, using a number of threads
+              and processors determined by the parallel_thread_count and
+              parallel_process_count values set in the boto configuration
+              file. You might want to experiment with these values, as the
+              best values can vary based on a number of factors, including
+              network speed, number of CPUs, and available memory.
+
+              Using the -m option may make your performance worse if you
+              are using a slower network, such as the typical network speeds
+              offered by non-business home network plans. It can also make
+              your performance worse for cases that perform all operations
+              locally (e.g., gsutil rsync, where both source and desination URLs
+              are on the local disk), because it can "thrash" your local disk.
+
+              If a download or upload operation using parallel transfer fails
+              before the entire transfer is complete (e.g. failing after 300 of
+              1000 files have been transferred), you will need to restart the
+              entire transfer.
+
+              Also, although most commands will normally fail upon encountering
+              an error when the -m flag is disabled, all commands will
+              continue to try all operations when -m is enabled with multiple
+              threads or processes, and the number of failed operations (if any)
+              will be reported at the end of the command's execution.
+
+              WARNING: If you use the gsutil -m option when copying data
+              between versioned buckets, object version ordering will not be
+              preserved. For more information see the
+              "COPYING VERSIONED BUCKETS" section under
+              'gsutil help versions'.
+
+  -o          Set/override values in the boto configuration value, in the format
+              <section>:<name>=<value>, e.g. gsutil -o "Boto:proxy=host" ...
+              This will not pass the option to gsutil integration tests, which
+              run in a separate process.
+
+  -q          Causes gsutil to perform operations quietly, i.e., without
+              reporting progress indicators of files being copied or removed,
+              etc. Errors are still reported. This option can be useful for
+              running gsutil from a cron job that logs its output to a file, for
+              which the only information desired in the log is failures.
+""")
+
+
+class CommandOptions(HelpProvider):
+  """Additional help about gsutil command-level options."""
+
+  # Help specification. See help_provider.py for documentation.
+  help_spec = HelpProvider.HelpSpec(
+      help_name='options',
+      help_name_aliases=['arg', 'args', 'cli', 'opt', 'opts'],
+      help_type='additional_help',
+      help_one_line_summary='Top-Level Command-Line Options',
+      help_text=_DETAILED_HELP_TEXT,
+      subcommand_help_text={},
+  )