packaging: don't use plain 'python' if another python has been specified Before this change, packaging on CentOS 8 failed because 'python' is used instead of 'python3'. Change was tested with: - make docker-centos7 - make docker-centos8 - make docker-ubuntu-bionic Differential Revision: https://phab.mercurial-scm.org/D9464

packaging: add pygit2 to the py3 Windows installers This is needed to be able to use the git extension. The extension no longer complains about the library being not installed, but `hg log -r .` on a repo that works in WSL yielded a TypeError: ... File "mercurial.hg", line 188, in _peerorrepo File "mercurial.localrepo", line 3224, in instance File "mercurial.localrepo", line 623, in makelocalrepository File "hgext.git", line 117, in _makestore File "hgext.git", line 48, in __init__ TypeError: Repository unable to unpack backend. Differential Revision: https://phab.mercurial-scm.org/D9405

upgrade: directly use the upgrade action constant This make the code simpler and will make it simpler to add more case in the future. Differential Revision: https://phab.mercurial-scm.org/D9467

upgrade: rename UPGRADE_FILELOG to UPGRADE_FILELOGS They are multiple filelog to upgrade, so this seems more accurate. Differential Revision: https://phab.mercurial-scm.org/D9466

bisect: add `-G` to an `hg log` command in a test This helps readers see what shape of DAG to expect Differential Revision: https://phab.mercurial-scm.org/D9373

bisect: refactor to work on a list of revspecs This will allow adding a `--rev` flag that can be passed more than once. Differential Revision: https://phab.mercurial-scm.org/D9372

copies: simplify the call to _merge_copies_dict Let's get the argument into the right order, then call the function once. Differential Revision: https://phab.mercurial-scm.org/D9417