convert svn: minor improvement to tag detection. The better way is probably to list the latest tags directory and look up the last log message for each entry. This is surprisingly annoying to do.

#!/bin/sh

hg init
echo a > a
hg ci -Am t

hg mv a b
hg ci -Am t1
hg debugrename b

hg mv b a
hg ci -Am t2
hg debugrename a

echo % test with --rev
hg debugrename --rev 1 b