`transfers.rsync` ignores ssh agent and always asks for key password

Thanks for making patchwork compatible with Python 3! Trying to port one small project to Fabric v2:

from invoke import task
from patchwork.transfers import rsync

def get_proj_path():
    from fabric.main import program
    return program.collection.loaded_from

@task
def upload(c):
    rsync(c, '%s/configs' % get_proj_path(), '/tmp')

> /Users/user/.virtualenvs/test1/lib/python3.6/site-packages/patchwork/transfers.py(131)rsync()
    129     cmd = cmd.format(options, source, user, host, target)
    130     import ipdb; ipdb.set_trace()
--> 131     return c.local(cmd)

Remote command works fine with ssh agent running:

ipdb> print(c.run('pwd'))
/root
Command exited with status 0.
=== stdout ===
/root

(no stderr)

c.local("rsync -pthrvz --rsh='ssh -p 22 ' /Users/user/work/project/configs root@1.2.3.4:/tmp") asks for ssh key:

ipdb> c
Enter passphrase for key '/Users/user/.ssh/id_rsa':

Running the same command from the shell works fine:

% rsync  -pthrvz  --rsh='ssh  -p 22 ' /Users/user/work/project/configs root@1.2.3.4:/tmp
sending an incremental file list

sent 237 bytes  received 18 bytes  72.86 bytes/sec
total size is 10.45K  speedup is 40.99

[max-arnold]

Below is my current workaround for this issue:

def rsync_with_agent(ctx, *args, **kwargs):
    """Ugly workaround for https://github.com/fabric/patchwork/issues/16."""
    ssh_agent = os.environ.get('SSH_AUTH_SOCK', None)
    if ssh_agent:
        ctx.config['run']['env']['SSH_AUTH_SOCK'] = ssh_agent
    return rsync(ctx, *args, **kwargs)

[krupan]

I’m having another problem related to this (problems with local mentioned above), trying to run my django unit tests before deploying:

c.local('poetry run python manage.py test')

Gives me this:

[KeyError]  
'PATH' 

But running remotely with c.run works just fine.