A function to cd to the root of the current Mercurial repository.

.cdg.sh

#!/usr/bin/env bash

# cd to the root of the current Mercurial repo
#
# usage:
#     Add the following function to your `.bashrc` or `.bash_profile` file,
#     or save it somewhere (i.e. `~/.cdg.sh`) and source it in `.bashrc`

cdh () {
    hg root >/dev/null && cd "`hg root`"
}