AsyncSSH 2.0.0 released!

[Ron Frederick]

AsyncSSH version 2.0.0 is now available on Github and PyPI. This is a major update which changes the code to use the modern async/await syntax internally and now requires a minimum Python version of 3.6. Those wishing to use AsyncSSH on Python 3.4 or 3.5 should stick to the AsyncSSH 1.x releases.

This release contains some potentially incompatible changes . See below for more information.

Here’s a list of changes since 1.18.0:

* Changed first argument of SFTPServer constructor from an
SSHServerConnection (conn) to an SSHServerChannel (chan) to allow
custom SFTP server implementations to access environment variables
set on the channel that SFTP is run over. Applications which subclass
the SFTPServer class and implement an __init__ method will need to be
updated to account for this change and pass the new argument through
to the SFTPServer parent class. If the subclass has no __init__ and
just uses the connection, channel, and env properties of SFTPServer
to access this information, no changes should be required.

* Removed deprecated "session_encoding" and "session_errors" arguments
from create_server() and listen() functions. These arguments were
renamed to "encoding" and "errors" back in version 1.16.0 to be
consistent with other AsyncSSH APIs.

* Removed get_environment(), get_command(), and get_subsystem() methods
on SSHServerProcess class. This information was made available as
"env", "command", and "subsystem" properties of SSHServerProcess in
AsyncSSH 1.11.0.

* Removed optional loop argument from all public AsyncSSH APIs,
consistent with the deprecation of this argument in the asyncio
package in Python 3.8. Calls will now always use the event loop
which is active at the time of the call.

* Removed support for non-async context managers on AsyncSSH connections
and processes and SFTP client connections and file objects. Callers
should use "async with" to invoke the async the context managers on
these objects.

* Added support for SSHAgentClient being an async context manager. To
be consistent with other connect calls, connect_agent() will now
raise an exception when no agent is found or a connection failure
occurs, rather than logging a warning and returning None. Callers
should catch OSError or ChannelOpenError exceptions rather than
looking for a return value of None when calling this function.

* Added set_input() and clear_input() methods on SSHLineEditorChannel
to change the value of the current input line when line editing is
enabled.

* Added is_closing() method to the SSHChannel, SSHProcess, SSHWriter,
and SSHSubprocessTransport classes. mirroring the asyncio
BaseTransport and StreamWriter methods added in Python 3.7.

* Added wait_closed() async method to the SSHWriter class, mirroring
the asyncio StreamWriter method added in Python 3.7.

Downloads can be found in the usual place:

Home page: http://asyncssh.readthedocs.io
PyPI: https://pypi.python.org/pypi/asyncssh
GitHub: https://github.com/ronf/asyncssh

Please let me know if you have any questions or problems with this new release.
--
Ron Frederick
ro...@timeheart.net