mercurial: mercurial (a distributed source management system) mercurial: mercurial: Mercurial is a cross-platform, distributed source management tool for mercurial: software developers. It is written in Python, with a binary diff mercurial: implementation written in C. Its major features include high- mercurial: performance; serverless, fully distributed collaborative development; mercurial: robust handling of both plain text and binary files; advanced mercurial: branching and merging capabilities; and full source code available mercurial: under the terms of the LGPL. mercurial: mercurial: Mercurial was written by Matt Mackall and other contributors.