Re: Emacs git repo mangled

[Michael Albinus]

Gregory Heytings <gregory@heytings.org> writes:

Hi Gregory,

> I don't know what happened exactly, but the Eglot tree has another
> root, so when you are inside that branch you should not see any of the
> files that are part of the Emacs tree (e.g. "Makefile" and
> "configure").  What was the cause of your confusion?

Exactly this: all files were lost, I thought. I'm not so fluent with
git, and so I did panic.

>> - If the bad commit is inside the merge, you won't see it, because
>> you have marked the whole merged subtree as good (by marking the
>> last commit of the merged subtree).
>
> By definition, the bad commit cannot be inside the merged Eglot tree,
> because that three contains only Eglot, not Emacs.  It bad commit
> could be the merge commit, but that one is not excluded during the
> bisection if you mark the last commit before the merge as "good".

That's the eglot case. I was speaking about a merge in general.

>> - It would require manual actions, because first you need to
>> determine the range of the merged subtree in order to mark last
>> commit of this.
>
> That is correct, and it is the price to pay to preserve history when a
> tree with another root is merged.

Sigh.

> Perhaps we could maintain a list of such merges somewhere, with the
> commit SHA of the last commit before each merge.  Or perhaps even a
> commented script, that would do a "git bisect good ..." for each such
> commit.

Don't know, I let it to the git aficionados.

Best regards, Michael.