checkout: gracefully handle files deleted from the index #5698
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chrisd8088
approved these changes
Apr 3, 2024
Right now, when someone deletes a pointer from the index with `git rm` and then runs `git lfs checkout`, the operation fails with a message of "Could not update the index" because our invocation of `git update-index` is missing the `--add` flag. Obviously, the user does not expect an error in this case, and `git checkout` simply ignores files staged for deletation, so let's do the same thing. If a file on disk is deleted, check the index with `git diff-index` to see if it's deleted from `HEAD`. If so, ignore the file, just like Git does. Note that we use `git diff-index` specifically because it doesn't refresh the index and is therefore much cheaper than alternatives, such as `git status`, which might do that.
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Right now, when someone deletes a pointer from the index with
git rmand then runsgit lfs checkout, the operation fails with a message of "Could not update the index" because our invocation ofgit update-indexis missing the--addflag.Obviously, the user does not expect an error in this case, and
git checkoutsimply ignores files staged for deletation, so let's do the same thing. If a file on disk is deleted, check the index withgit diff-indexto see if it's deleted fromHEAD. If so, ignore the file, just like Git does. Note that we usegit diff-indexspecifically because it doesn't refresh the index and is therefore much cheaper than alternatives, such asgit status, which might do that.Fixes #5669