Source location information is not always available in propagators

[kostrzewa]

It would be good to have the source location (and perhaps more info) added in the inverter info lime message or be present in propagator files in some other way.

[Siebren]

A general solution to this problem is not so easy, as there are several use cases, which in general need to be handled differently, and proposed solutions are not available/desirable for all cases.

• A point source is generated inside the code
• A volume source is generated inside the code
• A source is read in.

For sources generated inside the code, we can reasonably expect the tmLQCD code to deliver all relevant information in some way with the propagator. For a read in source, the best we could do is copy meta information from inside the source (LIME messages?), and put these in the propagator.

For point like sources, it was (is?) standard to put the timeslice in the filename, but more information is available, such as x,y and z coordinates.

While a complete solution probably depends on properly defining what a source is, and how to describe a lot of (all?) sources, we can at least make some improvements here by at least supplying the information we have access to (LIME messages, input file settings), and accepting that that information is incomplete/inelegant for now.