But I suspect this may also be an XY Problem. Perhaps you can explain why you (think you) need this. A module shouldn't normally need to know the full filename of its caller. Looking at it another way, why can't the script use the more reliable FindBin to determine its own path, and then pass that as an argument to the module?

I have a module that outputs a hash of useful information. The info is embedded in the module DATA but it changes (annually I think). The info can be found online so I'm trying to figure out a sane mechanism to update it without having to reinstall the module.

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