builtins.fetchGit: Fix build when fetching a git worktree #3229
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Worktrees[1] are a feature of git which allow you to check out a ref in
a different directory.
While playing around with flakes I realized that git repositories in a
worktree checkout break when trying to build a flake:
This issue has been fixed by determining with
git rev-parse --git-common-dir
where the actual
.git
directory is.Please note that this issue only exists on the
flakes
branch, fetchingworktree checkouts with Nix master seems to work fine.
[1] https://git-scm.com/docs/git-worktree