contrib/synthrepo: only generate 2 parents if model contains merges If `hg analyze` is run on a revision set which contains no merges, then `hg synthesize` will raise IndexError trying to select from p2distance, which will be empty.

convert: add support to find git copies from all files in the working copy I couldn't think of a better name for this option, so I stole the Git one in the hope that anyone converting a Git repo knows what it means.

convert: add support to detect git renames and copies Git is fairly unique among VCSes in that it doesn't record copies and renames, instead choosing to detect them on the fly. Since Mercurial expects copies and renames to be recorded, it can be valuable to preserve this history while converting a Git repository to Mercurial. This patch adds a new convert option, called 'convert.git.similarity', which determines how similar files must be to be treated as renames or copies.

convert: for git, factor out code to add entries to a separate function We're going to call this for multiple files in one iteration in upcoming patches.

convert: for git's getchanges, always split entry line into components We always need to know whether the entry is a rename or copy, so split it up unconditionally.

convert: for git's getchanges, use explicit index for iteration Upcoming patches will add support for copies and renames, for which we'll need to access multiple lines of the difftree output at once.

convert: add initial docs for git sources Upcoming patches will add config options for git sources. This patch adds a place to document them.