On Windows look for mercurial.ini in $USERPROFILE, too, if available as os.path.expanduser('~') does not always yield a useful directory. Based on a patch from Edouard Gomez <ed.gomez@free.fr>

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m "test" -d "1000000 0"
hg verify
hg parents
hg status
hg rollback
hg verify
hg parents
hg status