Docker Machine pre_window command breaks pane commands

[adambiggs]

Docker Machine requires an init command to be run in each shell session, which I've set as the Tmuxinator pre_window command:

pre_window: eval "$(docker-machine env test-vm)"

This worked great at first, but a few weeks ago I noticed that any following pane commands don't work. Strangely, they're printed in the console but not evaluated.

E.g.:

pre_window: eval "$(docker-machine env test-vm)"

windows:
  - "Test":
    panes:
      - ls

When I launch the above config, I get the following output:

$ eval "$(docker-machine env test-vm)"
ls
$

[neumachen]

Can you get a full trace?

[geowa4]

I can also confirm this is happening. I just switched one of my projects from boot2docker to docker-machine. If I switch back to boot2docker, it works even though the command fails. echo $? returns 0 when using this eval statement so I don't believe that's the issue.

[geowa4]

Changing to the following also fails the same way. It runs the eval statement, but no more.

windows:
    - work:
        root: /path/to/project
        panes:
            - main:
                - eval "$(docker-machine env dev)"
                - workon myenv

[adambiggs]

I just found this issue over in the Docker Machine repo. @pstengel's workaround fixed the issue for me:

eval "$(docker-machine env default </dev/null)"