Sergei Zimmerman 918a3cebaa libexpr: Use Store::requireStoreObjectAccessor instead or toRealPath in fetch
This forces the code to go through proper abstractions instead of the raw filesystem
API.

This issue is evident from this reproducer:

nix eval --expr 'builtins.fetchurl { url = "https://example.com"; sha256 = ""; }' --json --eval-store "dummy://?read-only=false"

error:
       … while calling the 'fetchurl' builtin
         at «string»:1:1:
            1| builtins.fetchurl { url = "https://example.com"; sha256 = ""; }
             | ^

       error: opening file '/nix/store/r4f87yrl98f2m6v9z8ai2rbg4qwlcakq-example.com': No such file or directory
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2022-01-24 13:28:21 +01:00

Nix

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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.

Installation and first steps

Visit nix.dev for installation instructions and beginner tutorials.

Full reference documentation can be found in the Nix manual.

Building and developing

Follow instructions in the Nix reference manual to set up a development environment and build Nix from source.

Contributing

Check the contributing guide if you want to get involved with developing Nix.

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.

License

Nix is released under the LGPL v2.1.

Description
Nix, the purely functional package manager
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