burn: Check where Pi Imager caches downloaded images

[rickotten]

https://www.raspberrypi.org/forums/viewtopic.php?t=272923

Looks like on OSx, it is the following file:

OSx: ~/Library/Caches/Raspberry\ Pi/Imager/lastdownload.cache

Windows: ~\AppData\Local\Raspberry Pi\Imager\cache\lastdownload.cache

Linux: ~/.cache/Raspberry Pi/Imager/lastdownload.cache

Pi: ? (likely same as linux)

Naturally, it appears it only caches the last download.

[jpfleischer]

where are images stored on raspberry pi using pi imager?
read the first line of the file and split on .img. in C:\Users<username>\AppData\Local\Raspberry Pi\Imager\cache on windows this is where the cache is stored. for example it is
try to figure
split on \0 (reads like NUL in notepad++) and find the line that contains .img first to get the file name.

[laszewsk]

can we reuse this for burning?

[laszewsk]

we found this and we found the name of teh os is not preserved in the filename, so we may just put in a comment in the FAQ where it is saved.
mayebe we went an image name such as --image=rpi-imager and then it uses that image, but ist nt super important

[laszewsk]

remember cms has also rpi-imager build in if it is installed