A command line tool to transfer files from one git branch to another

This tool is still in active development.

For now, it uses the following syntax:

bxfer -b <targetbranch> -t <target> <source>

This copies the contents of source directory in the current working directory and replaces the contents of the target directory in the targetbranch with them, and finally commits the changes to the targetbranch. If the target directory is not provided, the contents are copied into the source directory in the targetbranch.

It provides a binary that replaces the contents of the target subdirectory in the targetbranch with the contents of the source subdirectory in the current working directory in a git repo. Then, the changes are committed to the targetbranch.

This tool is indebted to three tools that precede it:

• ghp-import: almost exactly the same functionality
• quarto-cli: similar functionality bundled in with other stuff. It renders the quarto project, and copies the source directory configured in the _quarto.yml file to the target branch
• Documenter.jl: similar functionality but bundled with other stuff. It first renders the documentation, and the file transfer only works on CI machines. This is the genesis of this project! I wanted to manually transfer rendered documentation to the gh-pages branch on my local machine, but I couldn't force it to do that. It is possible that this functionality exists, and I failed to see how to trigger the file transfer to gh-pages. But again, the file transfer only happens after a render, and this project aims to provide a standalone utility like ghp-import. I must add that I learned a lot from the code in this project. In fact, the idea of using a temporary directory came from the deploydocs function.

ghp-import mostly does what this branchtransfer does. So why write a new tool? There are a few reasons:

• this is an excuse for me to learn Rust!
• ghp-import as it says in its documentation will destroy the target branch. This tool only rewrites the contents of the target folder.
• ghp-import also copies any untracked files in the working directory
• to the best of my understanding (and I could be wrong) ghp-import does everything in current directory

branchtransfer uses git worktrees to copy files from one branch to another. Thus, all potentially destructive operations occur in a separate directory altogether. Additionally, to reduce potential issues, the worktree corresponding to the target directory is opened in a temporary directory (h/t Documenter.jl).