docker.cmd.test assumes an image name

[bfirsh]

The docker.cmd.test label requires you to pass an absolute image name. The image being tested might be under a different name or tag.

A much more useful label for me would be a path to an executable inside the container to run. This would be portable across runtimes, and allow the consumer of the label to easily pass their own options, etc.

[lizrice]

I like the idea of being able to specify these cmd.* labels in a runtime-portable way. Would it work to have cmd, cmd.test, cmd.help etc that just have the path to the executable (and no options)? If you need to pass in particular options you'd need to specify docker.cmd.*, but if no options are required (or the label consumer knows what they are somehow) you could just use a vanilla cmd.*. Wdyt?

[bfirsh]

That sounds like it'd work!