Less magic in the command lines options.

[gabrieldemarmiesse]

From what I understand, subclassing CommandLineOption is not yet intended to be used by end users. I would like to take this chance to use less magic in the codebase, so that if we expose it in the API, it will be intuitive to users.

[coveralls]

Coverage decreased (-0.03%) to 85.279% when pulling 5ecbe86 on gabrieldemarmiesse:less_magic_for_command_line into d3fe102 on IDSIA:master.

[JarnoRFB]

Alas I believe this is already user facing https://sacred.readthedocs.io/en/latest/command_line.html?highlight=CommandLineOption#custom-flags . We might take a similar approach as with the host_info_gather decorator and make this an optional argument of Experiment.

[gabrieldemarmiesse]

My bad. I'm really bad at searching in the docs.

We might take a similar approach as with the host_info_gather decorator and make this an optional argument of Experiment.

I'm totally in favor of that. It's way less magic than before. Now the question is how to transition without breaking everything.

[gabrieldemarmiesse]

Closing as this PR won't be merged unless there are major changes.