Mercurial setup
Mercurial services (hg.python.org) are currently hosted on dinsdale.python.org. Everything is under user hg's home directory in /data/hg.
Mercurial itself uses a recent stable build, with a couple of patches. The Mercurial tree is in ~hg/mercurial. The patches are in named branch local, which is branched off branch stable. This source tree is installed in ~hg/lib/python, using make install-home.
Scripts are in ~hg/bin, which is itself versioned using Mercurial:
genauth regenerates the .ssh/authorized_keys file using the current committers' public keys
hg-ssh is used as a shell for remote logins of user hg, in order to restrict them to a few safe commands
gcrepos detects "stale" repositories in a directory ("stale" meaning having received no new changesets since their creation), so as to enable garbage-collecting of unused server-side clones; this still needs wrapping in a cronjob
hg itself is the Mercurial executable installed by make install-home