Use SourcePath for reading flake.{nix,lock}#10088
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Flakes still reside in the Nix store (so there shouldn't be any change
in behaviour), but they are now accessed via the rootFS
accessor. Since rootFS implements access checks, we no longer have to
worry about flake.{nix,lock} or their parents being symlinks that
escape from the flake.
Extracted from the lazy-trees branch.
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@edolstra Can we use |
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| LockFile() {}; | ||
| LockFile(const nlohmann::json & json, const Path & path); | ||
| LockFile(std::string_view contents, std::string_view path); |
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| LockFile(std::string_view contents, std::string_view path); | |
| LockFile(nlohmann::json json, std::string_view path); |
I think I would prefer that: let the caller parse and move in. Just as efficient, and keeps are more informative method type.
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I don't think that would be better. To the caller the lockfile is just an opaque string. The fact that it's JSON is an implementation detail of LockFile.
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Well, the caller does want to know that toJSON() and this are related by a round trip law, right?
I don't mind also exposing the current signature as a simple wrapper if it is easier for call sites.
Probably best not to do that right now, because it could change semantics if the paths seen by the evaluator are not in |
Wouldn't it only affect flakes, and only affect flakes that have bugs? Granted, legacy code should be usable through flakes, but maybe this particular issue is very minor. I think we could try that in 2.22, if 2.21 goes fairly well. |
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#9852 This is the bug I am thinking of, FYI. |
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This pull request has been mentioned on NixOS Discourse. There might be relevant details there: |
5 participants
Motivation
Flakes still reside in the Nix store (so there shouldn't be any change in behaviour), but they are now accessed via the
rootFSaccessor. Since rootFS implements access checks, we no longer have to worry aboutflake.{nix,lock}or their parents being symlinks that escape from the flake.Extracted from the lazy-trees branch.
Context
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