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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.
10 lines
604 B
Markdown
10 lines
604 B
Markdown
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synopsis: Store paths are allowed to start with `.`
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issues: 912
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prs: 9867 9091 9095 9120 9121 9122 9130 9219 9224
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Leading periods were allowed by accident in Nix 2.4. The Nix team has considered this to be a bug, but this behavior has since been relied on by users, leading to unnecessary difficulties.
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From now on, leading periods are officially, definitively supported. The names `.` and `..` are disallowed, as well as those starting with `.-` or `..-`.
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Nix versions that denied leading periods are documented [in the issue](https://github.com/NixOS/nix/issues/912#issuecomment-1919583286).
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