Make it possible for projects to have volumes

[jawher]

An example:

In the upcoming bazooka e2e (end to end tests):

• The go test code places some files in a folder, say a .bazooka.yml and a couple .go files for example
• The test code then starts a git daemon container to serve these files over the git:// protocol. The files directory is bind-mounted to the git container

This works if the test code is executed on the host, but not in bazooka, because the test code places the files in a directory in its own filesystem, which is not visible from the outside and cannot be mounted as a volume in another container.

[julienvey]

would a simple syntax like services be enough ?

volumes:
  - /some/path/on/host:/a/container/path

and we juste add this when running docker run on the build container

[jawher]

I really don't like the idea of specifying host paths in the .bazooka.yml file.

I was thinking of something like:

volumes:
  - env_var_name:/a/container/path

Where bazooka would mount a host directory in the container under the specified path, while also exposing an env var with the specified name containing the said host path.