standalone: print an error if the destination isn't a Git repository #5283
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When the handler setup fails, we just exit right now, instead of sending an error message. That leads to less than helpful behaviour if the destination repository isn't a valid Git repository for whatever reason. To improve this, let's make sure that we return an error message at setup if something fails so that the user in turn gets an error message.
If `git rev-parse --git-dir` fails, Git doesn't think that the destination is a valid repository for whatever reason. One of the most common reasons for that is that the repository is owned by another user. In such a case, we want to show the error message from Git, since we really have no other indication that this is the case. It could be just that the destination isn't a repository at all. Regardless, the error message would be useful to the user to determine the problem, so let's return it if standard error isn't empty.
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If
git rev-parse --git-dirfails, Git doesn't think that the destination is a valid repository for whatever reason. One of the most common reasons for that is that the repository is owned by another user.In such a case, we want to show the error message from Git, since we really have no other indication that this is the case. It could be just that the destination isn't a repository at all. Regardless, the error message would be useful to the user to determine the problem, so let's return it if standard error isn't empty.
We also have an initial commit that sets up the error message processing.
Fixes #5081