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lib/types: add types.pathNotInStore #373287

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@jfly jfly commented Jan 12, 2025

NOTE: This PR depends on #373285 (which is why there are 2 commits in here). Please review/merge #373285 before this one! One it's merged, I'll rebase this and take it out of draft state.

This option parallels our existing types.pathInStore type. This is
useful for when a module needs a path to a file, and wants to protect
people from accidentally leaking that file into the nix store.

Things done

  • Built on platform(s)
    • x86_64-linux
    • aarch64-linux
    • x86_64-darwin
    • aarch64-darwin
  • For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
    • sandbox = relaxed
    • sandbox = true
  • Tested, as applicable:
  • Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
  • Tested basic functionality of all binary files (usually in ./result/bin/)
  • 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
    • (Package updates) Added a release notes entry if the change is major or breaking
    • (Module updates) Added a release notes entry if the change is significant
    • (Module addition) Added a release notes entry if adding a new NixOS module
  • Fits CONTRIBUTING.md.

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jfly added 2 commits January 12, 2025 13:10
As of [nix v2.21.0](https://nix.dev/manual/nix/2.25/release-notes/rl-2.21.html):

> Store paths are allowed to start with `.`

I'm not entirely sure what range of versions of `nix` we try to stay
compatible with over here in `nixpkgs`. That said, I don't think
particular change would cause issues for people using a version of `nix`
that doesn't support leading periods.
This option parallels our existing `types.pathInStore` type. This is
useful for when a module needs a path to a file, and wants to protect
people from accidentally leaking that file into the nix store.
@github-actions github-actions bot added 6.topic: nixos Issues or PRs affecting NixOS modules, or package usability issues specific to NixOS 8.has: module (update) This PR changes an existing module in `nixos/` 6.topic: module system About "NixOS" module system internals 6.topic: lib The Nixpkgs function library labels Jan 12, 2025
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6.topic: lib The Nixpkgs function library 6.topic: module system About "NixOS" module system internals 6.topic: nixos Issues or PRs affecting NixOS modules, or package usability issues specific to NixOS 8.has: module (update) This PR changes an existing module in `nixos/` 10.rebuild-darwin: 1-10 10.rebuild-linux: 1-10
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