On Wed, Mar 05, 2008 at 08:28:44AM +0200, Michael Livshin wrote:
Brian Mastenbrook brian@mastenbrook.net writes:
No. These days it appears that cvs is becoming the least common denominator from which people mirror git or $DVCSOFWEEK. Folks who want to use a distributed version control system can set up mirroring from cvs upstream. For the rest of us it's just one less package to install on N different computers where I have SLIME checked out. In fact it'd probably be even better if actual development took place off the mirror and got pushed to CVS HEAD when it worked reliably.
what he said. this is effectively today's SBCL situation, BTW, and it Seems To Work Just Fine.
The irony is (and I think I can say this authoritatively, having written most of one before giving up) writing a CVS importer into a changeset-DAG-based system that works correctly in all cases is /really/ hard, by far the hardest of all of the currently-popular systems. SVN is probably second, because of its losing branches-are-copies model.
It's quite easy (theoretically) to migrate between any of the changeset-DAG-based systems.
At least in git's case, all of the existing CVS importers have some flaw or another:
* git cvsimport: Incremental, but uses cvsps, which means it is slow and makes fantastically incorrect decisions sometimes. Treats vendor branches like normal branches, which means everything gets completely mangled. * parsecvs: Fast, not incremental, sometimes misplaces tags. This is what I've wound up using for one-time imports, and I fix the tags by hand when they're wrong. * fromcvs: Fast, incremental, doesn't do tags at all. This is what I use for incremental imports. * cvs2svn/cvs2git: Not incremental, but probably the most correct of all current importers. Unfortunately, AFAIK it still makes everything look like an SVN repository (i.e. with an extra branch for each tag). * Tailor: Slow, incremental, and has made very bad decisions on me similar to the ones that git cvsimport makes.
This is getting quite off topic though, sorry...
-bcd