pyoxidizer: allow extensions to be loaded from the file system
It seems that setting this config is all that's needed to be able to
load extensions from the file system (which we clearly want). Thanks
for making this work, Gregory Szorc!.
Differential Revision: https://phab.mercurial-scm.org/D8122
#if no-windows no-osx
$ mkdir -p xdgconf/hg
$ echo '[ui]' > xdgconf/hg/hgrc
$ echo 'username = foobar' >> xdgconf/hg/hgrc
$ XDG_CONFIG_HOME="`pwd`/xdgconf" ; export XDG_CONFIG_HOME
$ unset HGRCPATH
$ hg config ui.username 2>/dev/null
foobar
#endif