How did PortableApps implement relative paths?

[PLegoux]

Continuation of the subject How did PortableApps implement relative paths? :

@emyoulation

Whenever a USB device is plugged into a new system, it is assigned an arbitrary drive letter. But PortableGramps detects its own location upon launch and revises the relative offsets. Then triggers Gramps. And Gramps registers the correct .ini files, plugins, relative media path, database path, and so forth.

Contrary to what @emyoulation said, relative media path does not always work.

It seems using a linux style path for Media relative path in Gramps preferences, at least for Gramps PortableApp, is the way to store media path and make it compatible to drive letter change from PC to PC. e.g:

That Windows media style path : i:\gramps\grampsportable\data\Archive Documents
don’t work anymore if drive letter on another PC change from I: to D: or anything else than I:

But this linux style one: /gramps/grampsportable/data/Archive Documents
works fine with the PortableApp on any PC with any drive letter the USB stick is assigned to.

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I’ve just seen @ennoborg answer to another post very similar to mine