Currently, `uv init` works without a `git` executable, and with a
working `git` executable, but not with a broken `git`, be it from GitHub
Action's Windows CI or from the shim we insert.
`uv init` calls git twice: Once `git rev-parse` to check whether a git
repo already exists, and then `git init` (if there is no git repository
yet and no `--vcs none`).
By separately handling the cases where git failed during `git rev-parse`
doesn't work vs. where the is no repository when checking for an
existing repo work tree, we can avoid calling `git init` for broken git
and erroring. We have to hardcode the expected git command outputs to be
able to check.
## Summary
Similiar to `cargo init --vcs <VCS>`, this PR adds the `--vcs <VCS>`
flag for `uv init`, allowing to create a version control system during
initialization. By default, `uv init` will create a Git repository if
the `--vcs` flag is not provided. Use `--vcs none` to disable this
feature.
Currently, only Git is supported. While Cargo also supports hg, pijul,
and fossil, this initial PR only includes Git. We can add more later if
there are any user requests.
---------
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
konsti
Jo