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As discussed in the maintainer meeting on 2024-01-29.
Mainly this is to avoid a situation where the name is parsed and
treated as a file name, mostly to protect users.
.-* and ..-* are also considered invalid because they might strip
on that separator to remove versions. Doesn't really work, but that's
what we decided, and I won't argue with it, because .-* probably
doesn't seem to have a real world application anyway.
We do still permit a 1-character name that's just "-", which still
poses a similar risk in such a situation. We can't start disallowing
trailing -, because a non-zero number of users will need it and we've
seen how annoying and painful such a change is.
What matters most is preventing a situation where . or .. can be
injected, and to just get this done.
(cherry picked from commit f1b4663805a9dbcb1ace64ec110092d17c9155e0)
Change-Id: I900a8509933cee662f888c3c76fa8986b0058839
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This reverts commit 24bda0c7b381e1a017023c6f7cb9661fae8560bd.
(cherry picked from commit 9ddd0f2af8fd95e1380027a70d0aa650ea2fd5e4)
Change-Id: Ideb547e2a8ac911cf39d58d3e0c1553867bdd776
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This has been the behaviour before Nix 2.4. It was dropped in a rewrite
in 759947bf72c134592f0ce23d385e48095bd0a301, allowing the creation of
store paths that aren't considered valid by older Nix versions or other
Nix tooling.
Nix 2.4 didn't ship in NixOS until 22.05, and stdenv.mkDerivation in
nixpkgs drops leading periods since April 2022, so it's unlikely anyone
is relying on the current lax behaviour.
Closes #9091.
Change-Id: I4a57bd9899e1b0dba56870ae5a1b680918a18ce9
(cherry picked from commit 24bda0c7b381e1a017023c6f7cb9661fae8560bd)
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`///@file` makes them show up in the internal API dos. A tiny few were
missing `#pragma once`.
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The property test in fact found a bug: we were excluding numbers!
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