/data wipe from other MTD roms

[fbis251]

We need to figure out a way to check which MTD rom we're flashing from. If it's a non-upgrade rom (CM7 -> CM7 or CM9 -> CM9) we also need a /data wipe in updater.sh

[jt1134]

Would be easy enough to check for a CM specific app or something, and wipe if not found.

If it is found and it was really a different ROM, then that's that person's fault and they need to quit kanging so hard :p

Or maybe just stick a flag somewhere, /data/.cm or something

[Fluidification]

the problem is TWRP doesn't seem to let you read the build.prop even when you have system mounted.

It works fine in CWM. So it'd work for those on CWM, but not on TWRP.

[fbis251]

I hadn't looked into this for a while (11 months...) but I think jt's suggestion would be the easiest to get working. It wouldn't be that hard to just check for the following supported roms:
/data/.cm9
/data/.cm7
/data/.aokp_ics

etc etc