Log message:
Update gsutil to 4.51.

It now includes its own vendored copy of Boto.

Release 4.51 (release date: 2020-03-26)
======================================
- Fixed file permissions for credstor2 and tracker files (#1002 and # 1005)
- Added a check to restrict the duration (-d option) for signurl command
  to 12 hours if -u flag is used. (#1014)
- Updated rsync command to try patching before overwriting,
  rather than checking ACL (#1016)
- Several documentation updates and clarifications.

Release 4.50 (release date: 2020-04-30)
======================================
- Switched to Using V4 signature as default for S3 (#981)
- Updated rsa library to release-4.0 (#992)
- Updated test script to install pyenv if missing for kokoro (#990)
- Fixed print ordering in kms set by using print instead of
  text_util.print_to_fd (#974)
- Several documentation updates and clarifications (#969) (#987)

Release 4.49 (release date: 2020-03-26)
======================================
- Added support for service account impersonation for signurl.
- Fixed an issue with rsync throwing error when the destination url is a prefix of
  an existing object.
- Several documentation updates and clarifications.

Release 4.48 (release date: 2020-02-28)
======================================
- Fixed special character handling in filenames on Windows with Python3.
- Fixed issue while transferring binary files from S3 with Python3.
- Fixed KMS tests, so that keys are created in the same region as their buckets.
- Several documentation updates and clarifications.

Log message:
net/py-gsutil: remove nonexistent file from REPLACE_PYTHON

Log message:
py-gsutil: updated to 4.47

Release 4.47:

New Features
- Added support for the new archive storage class.

Other Changes
- Several documentation updates and clarifications.

Log message:
py-gsutil: updated to 4.46

Release 4.46:
Bug Fixes
- Fixed issue with domain permissions functionality.

Log message:
Update py-gsutil to 4.45, now with Python 3 support!

Release 4.45 (release date: 2019-10-18)
=======================================
Bug Fixes
------------------
 - Fixed exception when using CMEK with resumable uploads.
 - Fixed alias for new ubla command.
 - Fixed default RDNS behavior for backwards compatibility with 4.42 and earlier.

Other Changes
------------------
- Improvements to continuous integration workflow.

Release 4.44 (release date: 2019-10-02)
=======================================
New Features
------------------
- Added support for service account impersonation through a new `-i` option to
  specify a service account to impersonate.
- Added support for members using the deleted syntax (i.e. `deleted:user:...`,
  `deleted:group:...`, `deleted:serviceAccount:...`).
- Added support for the new uniform bucket-level access (`ubla`) command
  (currently an alias of `bucketpolicyonly`).
- Added `-w` flag to `kms` command, which shows a warning rather than failing
  when updating key permissions does not succeed.

Bug Fixes
------------------
- Fixed regression in cp where a statement like
  `cp my-file gs://my-bucket/non-existent-folder/` would create a file called
  `non-existent-folder` rather than `non-existent-folder/my-file`.
- Fixed streaming uploads for Python 3.

Release 4.43 (release date: 2019-09-20)
=======================================
New Features
------------------
- Added support for socks proxies, including socks4 and socks5.

Bug Fixes
------------------
- Fixed cp/mv errors that occur when  destination directory is a substring of
  another directory. Behavior now more closely matches OS cp/mv commands.
- Fixed issue where set IAM policy on objects threw errors.
- Fixed issue when showing help in a pager in Python 3 environments.

Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.42 (release date: 2019-08-05)
=======================================
 Bug Fixes
------------------
- Fixed some text encoding/decoding issues in certain Python 3 environments.
- Fixed issue where bundled crcmod for macOS could not be imported and would
  crash gsutil on Python 3.
- Fixed issue where trying to run gsutil on an unsupported version of Python 3
  (3.4 or below) would crash instead of presenting an informative error.

Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.41 (release date: 2019-07-16)
=======================================
New Features
------------------
- Added HMAC key management for service accounts. This includes a new \ 
"hmac"
  command to create/get/list/update/delete HMAC keys on service accounts.
  Currently, your project must be whitelisted for use with this new HMAC
  functionality. This restriction will be lifted in the near future.

 Bug Fixes
------------------
- Fixed bug where copying files > 100MiB from GCS to S3 was hanging.
- Fixed issue where content type was sometimes set improperly.

Release 4.40 (release date: 2019-07-01)
=======================================
New Features
------------------
- Added support for running gsutil on Python 3.5+. Python 2 will reach its EOL
  (End of Life) on Jan. 1, 2020, and gsutil will stop supporting Python 2.7 at
  some point afterward (TBD).

 Bug Fixes
------------------
- Fixed bug introduced in v4.39 where rsync would not correctly sync object/file
  names containing some special URL-encodable characters (e.g. "+" and
  whitespace characters).
- Fixed the update command so that it no longer fails when it detects the
  presence of additional top-level files that were added in the v4.39 release.

 Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.39 (release date: 2019-06-13)
=======================================
New Features
------------------
- Compression level is now configurable by setting "gzip_compression_level"
  under the "GSUtil" section in the boto config file. The default \ 
value is 9.

 Bug Fixes
------------------
- Fixed bug where IAM operations failed on buckets whose names lacked any
  letters.

 Other Changes
------------------
- Revised contribution guidelines to direct developers to submit GitHub pull
  requests instead of using the Rietveld code review tool.
- Several code changes to work toward Python 3 support (coming in a subsequent
  release).
- Several documentation and command help improvements.
- Various improvements to test stability and feedback.

Release 4.38 (release date: 2019-03-25)
=======================================
Bug Fixes
------------------
- Fixed issue where multiprocessing check would raise an exception if
  /etc/os-release was not in the expected format.

Other Changes
------------------
- Improved error message for trying to retrieve default object ACLs on a bucket
  with Bucket Policy Only enabled.
- When running "gsutil -D rsync ..." and encountering an error listing \ 
local
  files, gsutil will now print a stack trace as debug-level output.
- Several documentation updates and clarifications.

Release 4.37 (release date: 2019-02-26)
=======================================
Bug Fixes
------------------
- Fixed a bug where XML API requests would sometimes fail with SSLError
  exceptions due to SNI not being used for https connections.
- Fixed "du" output spacing for 6-digit sizes.

Other Changes
------------------
- Updated crcmod installation instructions for CentOS 6.

Release 4.36 (release date: 2019-01-28)
=======================================
New features
------------------
- Added Bucket Policy Only support to gsutil. This includes a new
  "bucketpolicyonly" command to get/set BPO on existing buckets, as \ 
well adding
  the ability to set BPO at bucket creation time with "mb -b". \ 
Currently, your
  project must be whitelisted for use with the new BPO functionality. This
  restriction will be lifted in the near future.

Bug Fixes
------------------
- Fixed a bug where "cp -n" would overwrite a local file at the \ 
destination if
  its size differed from the source's size.

Other Changes
------------------
- Updated crcmod installation instructions for enterprise SUSE systems.

Release 4.35 (release date: 2018-12-18)
=======================================
New features
------------------
- Added -u option to rsync; this will skip copying files/objects that are newer
  (as determined by checking mtime) at the destination.

Bug Fixes
------------------
- The "iam ch" command now allows supplying custom IAM roles.
- Fixed an issue where debug output was not displaying all of the loaded config
  files under the "config path(s)" label.
- Disabled running with multiple processes when running on Alpine Linux, as this
  would sometimes cause gsutil to hang forever. Running with multiple threads is
  still allowed.
- The "rsync" command now prints log messages during synchronization \ 
to indicate
  when symlinks are being skipped.
- The "Boto:ca_certificates_file" config option can now be overridden using
  the -o option.

Other Changes
------------------
- Disallowed installing gsutil on Python versions != 2.7.
- Several documentation updates and clarifications.

Log message:
py-gsutil: updated to 4.34

Release 4.34:

New features
- Added bucket lock support to gsutil. Currently, your project must be
  whitelisted for use with the new bucket lock functionality. This restriction
  will be lifted in the near future.

Bug Fixes
- Fixed issue where "rsync -P" would fail if run as the root user.
- Fixed an issue with credential caching where the source credentials for an
  entity would change but the old cached credentials would still be used.

Other Changes
- OAuth2 token exchanges now go to https://oauth2.googleapis.com/token instead
  of https://accounts.google.com/o/oauth2/token. Users using gsutil behind a
  firewall may need to adjust their firewall rules.
- If invoked via the Cloud SDK, gsutil's debug output now displays the path to
  gcloud's gsutil wrapper script for "gsutil path", rather than the \ 
actual entry
  point for the bundled gsutil component.
- Improved error messages for failed Cloud KMS requests.
- Improved error messages for "iam ch" command to clarify that assigning
  roles to project convenience groups (e.g. "projectEditor") is not \ 
allowed.
- Enhanced perfdiag command to include GCE instance details (if applicable)
  and the target bucket's location and storage class.
- Several documentation updates and clarifications.

Log message:
py-gsutil: updated to 4.33

Release 4.33:

Bug Fixes
- Fixed an issue with the "rsync" command on Windows that would cause \ 
gsutil
  to incorrectly join file path segments when the source given was the root
  of a drive, e.g. "C:".
- Fixed several places where gsutil referenced a variable that had not been
  correctly imported.

Other Changes
- Several documentation updates and clarifications.

Release 4.32:

Bug Fixes
- Fixed a file path resolution issue on Windows that affected local-to-cloud
  copy-based operations ("cp", "mv", "rsync"). If \ 
a local file URI containing
  relative path components ("." or "..") or forward slashes \ 
(rather than
  backslashes) was provided as a source argument, the resulting destination
  object(s) was incorrectly named. For recursive operations, this resulted in
  several files being copied to the same object path, overwriting each other.
- Fixed an issue with the "rsync" command on Windows that resulted in \ 
each rsync
  invocation not being able to delete its temporary synchronization files on
  disk.
- Fixed an issue where reading a specific generation of an object from S3 would
  fail.
- Fixed an issue where running gsutil with the top-level "-q" flag \ 
would result
  in credential-related logging statements being emitted to stderr.
- Gsutil no longer allows copying from streamed input if the top-level \ 
"-m" flag
  is specified. While this was previously allowed, it did not work correctly.

Other Changes
- Several documentation updates and clarifications.

Log message:
Update py-gsutil to 4.31.

Fix all dependencies. This time, there is an actual working gsutil binary.
Thus, fix PR pkg/52941.

Release 4.31 (release date: 2018-04-26)
=======================================
New features
------------------
- Added support for reauthentication within gsutil. Note that this only affects
  authentication when "gs_oauth2_refresh_token" is configured under the
  "Credentials" section of the boto config file and that token \ 
corresponds to a
  user account enrolled in 2-step verification.

Bug Fixes
------------------
- When creating a signed URL via the "signurl" command, gsutil now \ 
verifies that
  the specified expiration isn't longer than 7 days (the maximum allowed by the
  service).
- To support rewriting objects to be encrypted using a bucket's default KMS key,
  the "rewrite" command now rewrites all specified objects if no value is
  specified for "encryption_key" under the "GSUtil" section \ 
in the boto config
  file.

Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.30 (release date: 2018-03-28)
=======================================
New features
------------------
- Added Cloud KMS support for Google Cloud Storage resources, allowing the use
  of customer-managed encryption keys (CMEKs). Bucket-related functionality
  includes the new "kms" command, which can be used to get or set a \ 
bucket's
  default KMS key. Concerning objects, users may now specify the CMEK to be used
  for encryption via their boto config file, in the "encryption_key" \ 
attribute.
  In this way, users may specify either a CSEK or a CMEK to encrypt new objects,
  but not both. For more information, see "gsutil help encryption".

Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.29 (release date: 2018-03-14)
=======================================
New features
------------------
- Added transport compression support, available through the "-j" and \ 
"-J"
  options for the "cp", "mv", and "rsync" \ 
commands. This is useful when
  uploading files with highly-compressible content. When specificed, files being
  uploaded are compressed on-the-fly in memory, sent to GCS, and uncompressed by
  GCS before they are stored. See "gsutil help cp" for additional \ 
information.
- When "use_magicfile=True" is set in the boto config file, gsutil will now
  append the detected charset, if present, to the object's Content-Type metadata
  field. For example, a Content-Type might be populated with
  "text/html; charset=us-ascii" rather than simply "text/html".

Bug Fixes
------------------
- Improved error handling and logging for upload resumption.
- After encountering a PreconditionException, the "acl ch" command will now
  re-fetch the object generation before retrying.
- Fixed issue with parsing lifecycle conditions when using the XML API.
  Conditions whose values could be evaluated by Python as "falsy" \ 
(e.g. setting
  an "age" condition to the number 0 or "isLive" to false) \ 
would be omitted from
  the lifecycle configuration when "prefer_api=xml" was set in the \ 
boto config
  file. Note that the JSON API is preferred by default, so most users were
  unlikely to encounter this issue.
- For commands that fetch bucket ACLs or default ACLs, when the user does not
  have storage.buckets.getIamPolicy on the GCS bucket, using the XML API will
  now behave consistently with the JSON API and display ACL/default ACL fields
  as empty, rather than throwing a CommandException.

Other Changes
------------------
- Several documentation updates and clarifications.
- The "signurl" command now uses signature V4 signing format to \ 
generate URLs.

Log message:
Add a subset of dependencies.

This adds some of the required Python module dependencies, but not all of
them. More to come.

Log message:
Add a package for py-gsutil, version 4.28.

gsutil is a Python application that lets you access Google Cloud Storage and
Amazon S3 from the command line. You can use gsutil to do a wide range of
bucket and object management tasks, including:

* Creating and deleting buckets
* Uploading, downloading, and deleting objects
* Listing buckets and objects
* Moving, copying, and renaming objects
* Editing object and bucket ACLs