Use git filter-branch to move all projects files to a subdir and rewrite all commits

git-filter-branch-move-files.md

1. Clone project

2. Checkout all branches that contain the files that should be moved

3. Delete the remote

4. Run the filter-branch command:

   git filter-branch --tree-filter 'mkdir -p /path/to/tmp; mv * /path/to/tmp; mkdir subdir; mv /path/to/tmp/* subdir/' --tag-name-filter cat --prune-empty -- --all

   • All files are first copied to a temporary dir and move from there to the new destination
   • Existing tags are updated
   • Empty commits are ignored
   • The filters are applied to all branches

5. Add the remote

6. Push (force) all branches and tags back to remote:

   git push -f --all
   git push -f --tags