Replace rerun with %save + %runscript or %runfile

[BoPeng]

Although %rerun is convenient in rerunning the same workflow with different options, it is not clear what is the "previous run'. Since we already have the %save magic to save the content of cell to a file, it seems to make sense to introduce %runfile to workflow from an external script. It is similar to !sos run script but can make use of the task status, background mode etc.

[gaow]

does it support running ipynb format?

[BoPeng]

Yes, it does, and if you do not specify an extension, it will search for .sos and then .ipynb.

[BoPeng]

But having a for a.sos or a.ipynb makes the %runfile filename suspicious so I am thinking if I should rename the magic to something like %runscript, which does not sound quite correct either. Perhaps I should require the specification of full filename (with extension).

[BoPeng]

OK. I guess I will just keep the extension search feature hidden...