Re: Git push subtree fail unknown revision or path possibly due to missing git-subtree-split commit

From: Philippe Blain <levraiphilippeblain@gmail.com>
Date: Oct 7, 2021, 02:52 UTC
Message-ID: <61ee8bec-1e6c-e3c7-2cef-7520f376c18c@gmail.com>
In-Reply-To: <CANcBuaZstymNMvbPX553kgr=FsrFFcDEivfiDPsPe3uyGLb78g@mail.gmail.com>

Hi Eddie,

Le 2021-10-05 à 00:53, Eddie Ridwan a écrit :

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> Thank you for filling out a Git bug report!
> Please answer the following questions to help us understand your issue.
> 
> What did you do before the bug happened? (Steps to reproduce your issue)
> git pull/push subtree as normal, although it is possible that one of
> the contributors to the subtree repo may have done a force push.

I think that is indeed what happened (see below).

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> 
> What did you expect to happen? (Expected behavior)
> git push subtree to update the remote subtree repo.
> 
> What happened instead? (Actual behavior)
> Failed to update the remote subtree repo. Error message:
> 
>         fatal: ambiguous argument
> '3f44cc87ceb87df1d9171096596a824fc3050a27^{commit}': unknown revision
> or path not in the working tree.
>      Use '--' to separate paths from revisions, like this:
>      'git <command> [<revision>...] -- [<file>...]'
>      could not rev-parse split hash
> 3f44cc87ceb87df1d9171096596a824fc3050a27 from commit
> 8577911bf6183497cc246aa620e7be1b6becec29

It would be easier to help you if you gave a URL for your repository :) (or at least for the subtree). I managed to find you Stack Overflow post [1] by Googling these commit hashes (!). Fortunately you mention the subtree URL in your question, and that's enough to go by in this case.

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> 
> What's different between what you expected and what actually happened?
> 
> Failed to update the subtree repo, as expected;
> 
> Anything else you want to add:
> 
> I am not able to find the commit/hash
> 3f44cc87ceb87df1d9171096596a824fc3050a27 in the repo. In gitx, I can
> see that the commit is a git-subtree-split. But it appears to no
> longer exist in the repo.

Here, I'm assuming that by "in the repo" you mean in a clone of the subtree repo, i.e. a clone of https://github.com/OpenSID/tema-natra.

Indeed the commit with hash 3f44cc87ceb87df1d9171096596a824fc3050a27 does not exist in such a clone. But, it still exists on GitHub:

https://github.com/OpenSID/tema-natra/commit/3f44cc87ceb87df1d9171096596a824fc3050a27

GitHub almost never removes commits in practice. This is good news, because it means you can fetch it locally.

> How can I bypass or recover from this apparent missing commit? Any
> help would be greatly appreciated.

The git-subtree script does need the commit locally to work. So, just fetch the commit by its hash. In your project repository (the one which uses tema-natra as a subtree), run:

git fetch https://github.com/OpenSID/tema-natra.git 3f44cc87ceb87df1d9171096596a824fc3050a27

This will download the needed objects. After that, you *should* be able to run your 'git subtree push' command.

Note: I think that the 'premium' branch (mentioned in your Stack Overflow question)
was indeed force-pushed, since 'git log --oneline dadcd0167^..' does not show the two
commits that appear in your image [2] that read "Update statistik_pengunjung.php"

Hope that helps,

Philippe.

[1] https://stackoverflow.com/questions/69431546/git-push-subtree-fail-unknown-revision-or-path-possibly-due-to-missing-git-subtr [2] https://i.stack.imgur.com/1tMln.jpg