6dfeff04c1
Previously arguments to getFile, upsertFile weren't checked to be inside the root directory. It's not a very big issue since substituters/stores are already a trusted component and can't be specified without being a trusted user. Still, it's nice to validate the necessary preconditions. Also changes the binaryCacheDir to be a std::filesystem::path. Note the gotcha with absolute paths and operator/.
Nix
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
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Additional resources
Nix was created by Eelco Dolstra and developed as the subject of his PhD thesis The Purely Functional Software Deployment Model, published 2006. Today, a world-wide developer community contributes to Nix and the ecosystem that has grown around it.
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