topic: introduce a minimal extensions to enable topic on the server
This small extensions simply expose topic in the branch. This should help
getting minimal support for topic from various hosting solution (eg: bitbucket
maybe ?) See extensions help for details.
#require test-repo pyflakes
Copied from Mercurial core (60ee2593a270)
$ cd "`dirname "$TESTDIR"`"
run pyflakes on all tracked files ending in .py or without a file ending
(skipping binary file random-seed)
$ hg locate 'set:(**.py or grep("^#!.*python")) - removed()' 2>/dev/null \
> | xargs pyflakes 2>/dev/null