Get add and locate to use new repo and dirstate walk code. They use a walk function that abstracts out the irritating details, so that there's a higher likelihood of commands behaving uniformly.

#!/bin/sh

set -x
mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -t "test" -u test -d "0 0"
hg history
hg manifest
hg cat a
hg verify