A tool for editing version-control repositories and translating among different systems. Supports git, bzr, Subversion, darcs, and fossil directly, also hg, CVS, and RCS through plugins.

reposurgeon - a repository surgeon

reposurgeon enables risky operations that version-control systems don't want to let you do, such as (a) editing past comments and metadata, (b) excising commits, (c) coalescing commits, and (d) removing files and subtrees from repo history. The original motivation for reposurgeon was to clean up artifacts created by repository conversions.

reposurgeon is also useful for scripting very high-quality conversions from Subversion. It is better than git-svn at tag lifting, automatically cleaning up cvs2svn conversion artifacts, dealing with nonstandard repository layouts, recognizing branch merges, handling mixed-branch commits, and generally at coping with Subversion's many odd corner cases. Normally Subversion repos should be analyzed at a rate of upwards of ten thousand commits per minute.

repodiffer is a program that reports differences between repository histories. It uses a diff(1)-like algorithm to identify spans of identical revisions, and to pick out revisions that have been changed or deleted or inserted. It may be useful for comparing the output of different repository-conversion tools in detail.

Another auxiliary program, repotool, performs various useful operations such as checkouts and tag listing in a VCS-independent manner. Yet another, repomapper, assists in automatically preparing contributor maps of CVS and SVN repositories.

The repocutter program is available for some specialized operations on Subversion dumpfiles; it may be useful in extracting portions of particularly gnarly Subversion repositories for conversion witth reposurgeon.

This distribution supports a generic conversion workflow using these tools, and includes the DVCS Migration Guide that describes how to use it.

The file 'reposurgeon-git-aliasescan be appended to your~/.gitconfig' to support working directly with action stamps in git.

Finally, an Emacs Lisp mode with useful functions for editing large comment mailboxes is included.

There is an extensive regression-test suite in the test/ directory. To test the correctness of this software, ensure that pylint is installed and then type make check.

See reporting-bugs.asc for advice on how to troubleshoot problems with reposurgeon and report bugs.

The main reposurgeon website along with the documentation in HTML files lives at

The files Dockerfile, .dockerignore, .gitlab-ci.yml, and the contents of ci/ are not distributed; they are configuration for test builds on GitLab's CI machinery.