git filter-branch --subdirectory-filter

Hi All,

I have some issues with git filter-branch.

I have a git repository that I wish to split into multiple seperate repositories for each logical module that it contains. Each logical module is already in its own directory at the root of the repo.

My experiments with 'git filter-branch' have been *partially* successful.

To extract a module into its own repo, I first copied the original repo (this was a simple cp -r, as it seemed to be the simplest way as git clone doesn't get all the branches) and ran filter-branch with a --commit-filter to skip commits that were irrelevant to th subdir.

That step worked just fine.

The next pass was to 'hoist' the contents of the subdir in the new repo into the root dir. I thought I could do this with a --subdirectory-filter argument to filter-branch, except when I do this, I loose tons of commits. (The working tree is correct, i.e. the same as the original repo working tree, but the history is screwed).

Anybody have any idea what I am doing wrong? If it can't be done with --subdirectory-filter can it be done with the 'subtree' merge strategy somehow?

Cheers,