Create a Launcher for Capsul v3

[sapetnioc]

This issue is probably more general than Capsul and could be moved in another project. The launcher will be the main entry point for users. This issue will hold the first decisions taken during various discussions that will come about this topic. There a many open question about this launcher. For instance :

• Is there only one launcher or several ?
• What are the name(s) of the launcher(s) ? BrainVISA, MIA, Populse, ... ?
• How launcher content is organized ?
• etc.

[sapetnioc]

I propose to change this issue because we are not ready yet to create a launcher but we are ready to build some GUI for Capsul configuration and engines management. Here are the changes I propose:

Subject: Create an entry point for Capsul Description: There is a need for a graphical and command line global entry point for Capsul. This entry point would allow to

• Inspect and change configuration.
• Get the status of configured engines and allow to start/stop database and workers.
• Follow the execution of processes and pipelines.

There will be one single entry point :

python -m capsul [global options] [command and command options]

Without command, it will open a GUI entry point (whose content is still to be discussed). If a command is given, it will be executed in text mode. If GUI becomes complex, we could also define commands to open a specific part of the GUI.