debugdiscovery: add flags to run discovery on subsets of the local repo
Generating new repository using strip of local clone is very expensive for large
repositories. And such large repository are the most likely to requires
debugging around discovery. So we add a simple way to run discovery using
provided sets of heads.
Differential Revision: https://phab.mercurial-scm.org/D9945
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install::
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing::
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.