git-carbon: duplicate files between repositories

git-carbon is a tool that helps manage duplicated files across repositories. One can think of it like git-submodule but for individual files.

Getting started

Add a file from an other repository

Add a file from a remote repository to your local worktree:

git carbon add ssh://git@github.com:myorg/sharedfiles.git .editorconfig

git-carbon will refuse to overwrite a file that already exist, unless you use --force:

git carbon add --force ssh://git@github.com:myorg/sharedfiles.git .editorconfig

git-carbon automatically stages its changes, so the only thing left is to commit:

git commit -m "Add shared .editorconfig"

Update shared file

git-carbon remembers where it got the files from, so it can apply changes easily. To get the new version of a shared file, you can use the update subcommand:

git carbon update .editorconfig

You can also update all files git-carbon knows about by passing --all to the subcommand:

git carbon update --all