Creating an 'hg ignore' extension

I often wish Mercurial had an 'hg ignore' command similar to 'bzr ignore'. Turns out it's pretty easy to add one:

#!/usr/bin/env python
"""Ignore pathnames and patterns"""

import os

def ignore(ui, repo, *pathnames):
    """Ignore the given pathnames and patterns."""
    outf = open(os.path.join(repo.root, ".hgignore"), "a")
    for p in pathnames:
        outf.write(p + "\n")

cmdtable = {
    'ignore': (ignore, [], "hg ignore pathname [pathname]"),

To use this, save it to a file such as ${HOME}/platform/independent/lib/hg/ Then add the extension to your ${HOME}/.hgrc: