Custom MyBinder laucher

[fmaussion]

Hi! For reasons discussed at length here, I'd like my JupyterBook notebooks to be launched via gitpuller in another binder-ready repository. The structure of the URL I'd like the binder button to create for me is following:

https://mybinder.org/v2/gh/{repo_binder}/master?urlpath=git-pull?repo=https://github.com/{repo_book}%26amp%3Bbranch=master%26amp%3Burlpath=lab/tree/{repo_book/path/to/notebook}%3Fautodecode

So a little bit like the hub config (with gitpuller) but with mybinder and an additional repo.

Is this possible at the moment? Thanks!!!