#require bzr

  $ . "$TESTDIR/bzr-definitions"

  $ cat > treeset.py <<EOF

  > import sys

  > from breezy import workingtree

  > import breezy.bzr.bzrdir

  > wt = workingtree.WorkingTree.open('.')

  > 

  > message, rootid = sys.argv[1:]

  > wt.set_root_id(b'tree_root-%s' % rootid.encode())

  > wt.commit(message)

  > EOF

change the id of the tree root

  $ mkdir test-change-treeroot-id

  $ cd test-change-treeroot-id

  $ brz init -q source

  $ cd source

  $ echo content > file

  $ brz add -q file

  $ brz commit -q -m 'Initial add'

  $ "$PYTHON" ../../treeset.py 'Changed root' new

  $ cd ..

  $ hg convert source source-hg

  initializing destination source-hg repository

  scanning source...

  sorting...

  converting...

  1 Initial add

  0 Changed root

  $ manifest source-hg tip

  % manifest of tip

  644   file

  $ cd ..