Some useful examples of [[Hooks]].
See also http://hgbook.red-bean.com/read/handling-repository-events-with-hooks.html

=== Don't commit code marked otherwise ===
Just add '''# NOCOMMIT''' in temporary sourcecode 
{{{#!FORMAT python
pretxncommit.nocommit = hg export tip | (! egrep -q '^\+.*#[ \t]*NOCOMMIT.*$')
}}}
=== Check for whitespace ===
{{{#!FORMAT python
pretxncommit.whitespace = hg export tip | (! egrep -q '^\+.*[ \t]$')}}}
=== Don't commit breakpoints ===
{{{#!FORMAT python
pretxncommit.pdb = hg export tip | (! egrep -q '^\+.*pdb\.set_trace\(\).*$')}}}