| # -*- 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, including exception stack traces. |
| |
| -DD Shows HTTP requests/headers, additional debug info, |
| execption stack traces, 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. |
| |
| -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={}, |
| ) |