Re: [PATCH/RFC] add: listen to --ignore-errors for submodule-errors

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Erik Faye-Lund <kusmabite@xxxxxxxxx> writes:

> I recently tried to do the following in the msysGit-repo:
>
>  $ git add --ignore-errors -- */.gitignore
>  fatal: Path 'src/git-cheetah/.gitignore' is in submodule 'src/git-cheetah'
>
> I was a bit puzzled by this; I explicitly specified --ignore-errors
> because I did not want to be stopped due to src/git-cheetah/.gitignore
> being located in a submodule.

If I recall correctly, originally --ignore-errors was added was by
those who (arguably misguidedly) wanted to randomly run "git add"
that can potentially race with ongoing working tree updates
(i.e. think of a poor-man's unreliable snapshotting filesystem), to
which "git add" will notice that the working tree file it was asked
to index changed while it was reading and error out.  Also on some
systems, "git add" on files that are currently open may not be able
to read from them, which would also cause a run-time error.  The
kind of errors the option was meant to ignore were "these paths are
perfectly OK to add, but for some reason, adding them fails at this
moment, and for the purpose of poor-man's unreliable snapshot, it is
OK not to pick the exact current state up, as we will pick it up the
next round", not your kind of request that will lead to an error of
the "adding this path will break the structural integrity of the
repository and git should error out" kind.

> The documentation seems to suggest that this is what is supposed to
> happen, and this seems like the most likely behavior that the user
> wanted. After all, there's no good reason submodules are special
> in this regard, no?

How does "git add .git" or "git add .git/config" behave with your
patch applied?  It is exactly the same kind of error that breaks the
structural integrity of the repository as adding src/cheetah/.gitignore
to the top-level project repository, and there is no good reason to
special case submodules, either.


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