[app:files] Use current directory for hashing.

[evilham]

This fixes collisions that were causing uploads to break in a very
terrible way.

Kudos to @kesselb for finding the problematic place and to
@hottwister for the proposed solution.

Fixes #10527.

It would be great if this were backported to 15.0.

[kesselb]

Please keep in mind that these changes are only a part of the fix from owncloud. I'm still unsure if we need the other changes for something.

https://github.com/owncloud/core/pull/29393/files

[kesselb]

@evilham could you please sign off your commits (check https://github.com/nextcloud/server/pull/14674/checks?check_run_id=77759184 for help)?

[MorrisJobke]

Tested and works 👍

[MorrisJobke]

@evilham could you please sign off your commits (check https://github.com/nextcloud/server/pull/14674/checks?check_run_id=77759184 for help)?

@evilham Any chance that you can add this?

[MorrisJobke]

Should also be fine without, because it's very little code change itself.

[MorrisJobke]

/backport to stable15

[welcome]

Thanks for your first pull request and welcome to the community! Feel free to keep them coming! If you are looking for issues to tackle then have a look at this selection: https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22
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[backportbot-nextcloud]

backport to stable15 in #14762

[evilham]

Sorry for the delay and thank you for merging.

Just as a comment: although I understand the motivation, I strongly disagree with the legal-name requirement; and indeed those bits of code are already unmistakeably under a compatible license.