Newer tox prevents usage of ssh agent (2.0.1)

[pytoxbot]

• Bitbucket: https://bitbucket.org/hpk42/tox/issue/253
• Originally reported by: @jbeluch
• Originally created at: 2015-05-21T22:34:30.462

Solution is to add passenv = SSH_AUTH_SOCK to your tox.ini.

Perhaps make this work by default?

[pytoxbot]

Original comment by @hpk42

with https://bitbucket.org/hpk42/tox/commits/521459223e524337d187ef07277f0ee1485cd313 all env variables are passed through for install.

[pytoxbot]

Original comment by @RonnyPfannschmidt

for additional contexts taken from irc - requirement files that end up using ssh will prompt for pass-phrases if the agent socket is unavailiable