Re: Weirdness with git change detection

> On Tue, Jul 11, 2017 at 06:15:17AM +0200, Torsten Bögershausen wrote:
>
>> On 11/07/17 01:45, Peter Eckersley wrote:
>> > I have a local git repo that's in some weird state where changes
>> > appear to be detected by "git diff" and prevent operations like "git
>> > checkout" from switching branches, but those changes are not removed
>> > by a "git reset --hard" or "git stash".
>> >
>> > Here's an example of the behaviour, with "git reset --hard" failing to
>> > clear a diff in the index:
>> >
>> > https://paste.debian.net/975811/
>> >
>> > Happy to collect additional debugging information if it's useful.
>> >
>> If possible, we need to clone the repo and debug ourselfs - in other
>> words, the problem must be reproducible for others.
>>
>> It the repo public ?
>
> It looks like https://github.com/AI-metrics/AI-metrics.
>
> I notice it has a .gitattributes file with:
>
>   *.ipynb filter=clean_ipynb
>
> There's a config snippet in the repo with:
>
>   [filter "clean_ipynb"]
>     clean = ipynb_drop_output
>     smudge = cat
>
> and the drop_output script is included. From the paste we can see that
> Peter was at commit c464aaa. Checking out that commit and running the
> script shows that it produces the differences that Git is showing.
>
> The problem is that the currently committed contents do not match the
> output of the clean filter. So even when "git reset --hard" puts the
> content from the repository back into the working tree (putting it
> through the smudge filter, which is a noop), running the clean filter on
> the result will always have a difference. Either the filter needs to be
> disabled, or the cleaned contents committed.
>
> -Peff