Unexpected behaviour of "history" feature

[icchalmers]

I have been using the EBE via bsp-xilinx, but the issue seems better suited here.

The "history" feature is undocumented (as far as I have been able to find) and I have found it's behaviour nonintuitive:

1. I would expect history to be stored on a per-repo basis, but it is instead always stored in ~/.ebe/{history_path}. This means history persists across repo clones, and also on complete deletion of a repo.
2. History is not cleared on a --clean-all

I would suggest:

1. Change the default history_path config option to be specified relative to the cloned repo OR allow specification of an absolute path
2. Add clearing of history as part of a --clean-all, and potentially as a targeted --clean-history

enclustra-buildscripts/build.py

Line 621 in 089d9ab

history_path = os.path.expanduser("~") + "/.ebe/" + history_path + "/"