Using bzrlib is probably easier than parsing the bzr log output:
from bzrlib.bzrdir import BzrDir
revision = BzrDir.open(pathToBranchDir).open_branch().revno()
I'll have a go at hacking on this tomorrow.
** Changed in: bughelper (upstream)
Assignee: (unassigned) => Dean Sas
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RFE: print bughelper version
https://launchpad.net/bugs/79231