Rewriting Git history to place all work in a subfolder instead of root

Question

I have a simple repository with linear history where work was done in the root folder. I would like to rewrite history so that all the work from every commit looks like it happened in the /server directory instead of the root directory.

In the end, the repository should have a single folder called server in its root, with all my project's files and folders now (and at all points of history before) located in /server.

Answer 1

git filter-branch --commit-filter '  
            toptree=`printf "040000 tree %s\\tserver" $1 | git mktree`
            shift
            git commit-tree $toptree "$@"
    ' -- --branches