scaff 
Painless scaffolding of the boring part of setting up projects that people other than you can use.
Scaff can be used to generate licenses, initial READMEs, makefiles, build derivations, whatever really. All thanks to the awesome Tera templating engine!
Example use
How it works
scaff will basically download a tarball, run tera on everything, and
extract out everything from any directory named scaff-out. The
reason for not extracting the whole tarball is to support hidden files
that you could potentially include from tera, and also to support
downloading a git repository directly from GitHub/GitLab without
including the root directory or any other non-relevant files like
readmes.
Getting it
You can get it using cargo, the official rust package manager:
You can also use Nix, although the default.nix embedded in this
repository is slow to compile. The GitLab CI will continously update a
binary cache you can use with Cachix.
Don't bloat down your repositories
It might be easy to think I'm condoning bloat when I literally make a tool to dumb code into your perhaps already filled code repos. This is not the case - I do not endorse bloat and I wouldn't recommend using this tool to extract 100 lines of code or whatever. That's part of the reason this tool doesn't allow updating any changes in the archives; it should only be used as a base, not as something that you sync between repositories.
For config files you intend to reuse and sync, I recommend the dhall configuration language to keep everything modular. This is not a replacement for dhall, it's merely a way to dump a base dhall file for modification later.