Push local repo to new sub-directory of remote repo

Question

I have a local git repository that I created and have been using for months. However this work will now be part of a larger project that has an existing repository, so I'd like to add the larger project's server as a remote and push my work into a sub-directory of that repository.

However I believe these naive steps will push my local repo into the top-level directory of the larger project's repo:

$ pwd
/home/yotommy/my-local-project
$ git remote add origin git://example.com/gitscn/larger-project.git
$ git push origin master ### goes to top-level directory, not desired!

I tried specifying a (not-yet-existing) subdirectory:

$ git remote add origin git://example.com/gitscm/larger-project.git/my/sub/dir
$ git push origin master
fatal: '/gitscm/larger-project.git/my/sub/dir' does not appear to be a git repository

Should I add the sub-directory to the larger-project repo first? Or is there a better approach?

Answer 1

Following the lead from @twalberg, I found documentation for subtree merging. Here is a condensed recipe for the case posed in the question.

$ git clone git://example.com/gitscm/larger-project.git
$ git remote add subproj_remote /home/yotommy/my-local-project
$ git fetch subproj_remote
warning: no common commits
remote: Counting objects: 461, done.
remote: Compressing objects: 100% (332/332), done.
remote: Total 461 (delta 157), reused 0 (delta 0)
Receiving objects: 100% (461/461), 272.89 KiB, done.
Resolving deltas: 100% (157/157), done.
From subproj_remote /home/yotommy/my-local-project
 * [new branch]      master     -> subproj_remote/master
$ git checkout -b subproj_branch subproj_remote/master
Branch subproj_branch set up to track remote branch master from subproj_remote.
Switched to a new branch 'subproj_branch'
$ git checkout master
Switched to branch 'master'
$ git read-tree --prefix=subproj/ -u subproj_branch
$ git commit -m "merged subproj"