git and cvs: Coexistence

There is a relatively trivial way to use git on trees managed by cvs which I use often to carry around cvs projects for new work and enjoy the distributed nature (which comes quite handy when on a train). Recipe: Check out the target tree with cvs, go into the root, git init, and cvs-files | xargs git add. One git commit -m initial and you are ready to go.

Now you can clone around as you like, and do cvs updates in the gitted sandbox, and commit those into git, and back. Only thing is that on the way back to cvs you manually need to track file additions/deletions.

The script cvs-files looks like:

#!/bin/sh
find * -name CVS -type d | while read cdir
do
  dir=`dirname $cdir`
  if test X$dir = X. ; then
    dir=""
  else
    dir="$dir/"
  fi
  sed -ne 's:^/\([^/][^/]*\)/.*$:\1:p' /dev/null ${dir}CVS/Entries* | \
    sort -u | while read name
  do
    if test -r $dir$name; then
      echo $dir$name
    fi
  done
done

It just goes through the CVS/Entries files to find out what's under CVS control to initially put those into git.