Survive pull/discover for hosted repositories in all VCSes
Summary:
Hosted repositories only sometimes survive the pull/discover phases right now, due to issues like:
- Pull tries to git clone, but should git init.
- Mercurial doesn't handle empty repositories with on branches.
- SVN tries to connect to an invalid remote.
- None of them set the INIT repo flag correctly, so status doesn't get updated properly in the UI.
Fix all this stuff.
Test Plan:
- For each of Git, SVN and Mercurial:
- Created a new repository from the web UI in a deactivated state.
- Made it hosted.
- Manually ran pull/discover.
- Verified we end up with initialized, empty repositories in consistent states.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2230
Differential Revision: https://secure.phabricator.com/D7474