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Faithfully convert Subversion repositories to Git. SubConvert.py, version 1.0 Copyright (c) 2011, BoostPro Computing. All rights reserved. This script replays Subversion dump files as Git actions, yielding a Git repository which has as close of a 1:1 correspondence with the original Subversion repository as possible. Some respects in which this are not possible are: * Subversion allows for multiple transactions within a single revision, and it is possible that some of those transactions may affect more than one branch. This must be mapped as two separate Git commits if/when it occurs. * Subversion supports revisions which modify only directories and/or properties of files and directories. Since Git tracks only files, and has no notion of Subversion's properties, these revisions are ignored. * Subversion models all content in a flat filesystem, such that semantically, there is no distinction between branches and tags, except that typically a "tag" is a directory which is never modified after initial creation. Because proper identification of branches and tags cannot faithfully be done hueristically, this script makes a best guess based on activity within all revisions, and then outputs a data file for the user to correct before performing the final conversion. * Subversion also tracks version history for multiple projects within this same, single filesystem. This script, if provided with a submodules "manifest" file, can create multiple repositories in parallel: one to model the original Subversion repository as exactly as possible, with all projects conflated in a single filesystem; and a separate repository for each submodule. Note that for efficiency's sake -- to avoid thrashing disk unnecessarily and taking orders of magnitude more time -- this script performs Git actions directly, completely bypassing use of a working tree. That is, instead of using porcelain commands such as git add, remove, commit, etc., and git checkout to switch between branches, it uses the underlying plumbing commands: hash-object, mktree, commit-tree, update-ref, symbolic-ref, etc. The final checkout to yield the working tree(s) is done only after all repositories and their branches and tags have been finalized.