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The [https://uutils.github.io/ Uutils] project reimplements ubiquitous command line utilities in memory-safe Rust
The [https://uutils.github.io/ Uutils] project reimplements ubiquitous command line utilities in memory-safe Rust.


== Coreutils ==
== Coreutils ==
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<small>For details, see [https://github.com/uutils/coreutils/blob/main/docs/src/extensions.md Uutils Coreutils - Extensions]</small>
<small>For details, see [https://github.com/uutils/coreutils/blob/main/docs/src/extensions.md Uutils Coreutils - Extensions]</small>


=== Usage ===
[https://search.nixos.org/packages?show=uutils-diffutils Nixpkgs - <code>uutils-coreutils</code>]
In your configuration file, add the [https://search.nixos.org/packages?show=uutils-coreutils-noprefix <code>uutils-coreutils-noprefix</code>] package in <code>environment.systemsPackages</code>, and give it a high priority in order to avoid potential conflicts with [https://search.nixos.org/packages?show=coreutils-full <code>coreutils-full</code>]
 
{{File|3={ pkgs, ... }:
{
  environment.systemPackages = with pkgs; [
    (lib.hiPrio pkgs.uutils-coreutils-noprefix) # `lib.hiPrio` is used to avoid potential conflict with `coreutils-full` (also see https://discourse.nixos.org/t/how-to-use-uutils-coreutils-instead-of-the-builtin-coreutils/8904/15?u=malix)
  ];
}|name=/etc/nixos/configuration.nix|lang=nix}}
<small>If you want a prefixed package for some reason, use [https://search.nixos.org/packages?show=uutils-coreutils <code>uutils-coreutils</code>] instead</small>
<small>If you want a prefixed package for some reason, use [https://search.nixos.org/packages?show=uutils-coreutils <code>uutils-coreutils</code>] instead</small>
{{Note|1=This will '''not''' replace [https://search.nixos.org/packages?show=coreutils-full the <code>coreutils-full</code> package], only install it and give it higher priority
Using [https://search.nixos.org/options?show=system.replaceDependencies <code>system.replaceDependencies</code>] instead of [https://search.nixos.org/options?show=environment.systemPackages <code>environment.systemPackages</code>] seems to be a better approach, but it has not been successful yet
<small>For details, see [https://discourse.nixos.org/t/how-to-use-uutils-coreutils-instead-of-the-builtin-coreutils/8904/36?u=malix NixOS - Discourse: "How to use uutils-coreutils instead of the builtin coreutils?" (8904) - Comment 36]</small>}}


== Findutils ==
== Findutils ==
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[https://search.nixos.org/packages?show=uutils-diffutils Nixpkgs - <code>uutils-diffutils</code>]
[https://search.nixos.org/packages?show=uutils-diffutils Nixpkgs - <code>uutils-diffutils</code>]
== Installation ==
To do a systemwide replacement of gnu utils with uutils you can use system.replaceDependencies. It should be noted that the name of the dependency is hardcoded in the binaries, therefore the name of the replacing dependency needs to have exactly the same length as the name of the source dependency. To do this declaratively this snippet should be added to your configs:
{{File|3={ pkgs, ... }:
let
  coreutils-full-name = "coreuutils-full" + builtins.concatStringsSep ""
    (builtins.genList (_: "_") (builtins.stringLength pkgs.coreutils-full.version));
  coreutils-name = "coreuutils" + builtins.concatStringsSep ""
    (builtins.genList (_: "_") (builtins.stringLength pkgs.coreutils.version));
  findutils-name = "finduutils" + builtins.concatStringsSep ""
    (builtins.genList (_: "_") (builtins.stringLength pkgs.findutils.version));
  diffutils-name = "diffuutils" + builtins.concatStringsSep ""
    (builtins.genList (_: "_") (builtins.stringLength pkgs.diffutils.version));
in
{
  system.replaceDependencies.replacements = [
    # coreutils
    {
      # system
      oldDependency = pkgs.coreutils-full;
      newDependency = pkgs.symlinkJoin {
        # Make the name length match so it builds
        name = coreutils-full-name;
        paths = [pkgs.uutils-coreutils-noprefix];
      };
    }
    {
      # applications
      oldDependency = pkgs.coreutils;
      newDependency = pkgs.symlinkJoin {
        # Make the name length match so it builds
        name = coreutils-name;
        paths = [pkgs.uutils-coreutils-noprefix];
      };
    }
    # findutils
    {
      # applications
      oldDependency = pkgs.findutils;
      newDependency = pkgs.symlinkJoin {
        # Make the name length match so it builds
        name = findutils-name;
        paths = [pkgs.uutils-findutils];
      };
    }
    # diffutils
    {
      # applications
      oldDependency = pkgs.diffutils;
      newDependency = pkgs.symlinkJoin {
        # Make the name length match so it builds
        name = diffutils-name;
        paths = [pkgs.uutils-diffutils];
      };
    }
  ];
}|name=/etc/nixos/configuration.nix|lang=nix}}
It should be noted that this is of course still quite a hacky solution, as the name of the resulting binaries will simply be padded with the char '_'. A better solution might be found in the future.
<small>For details, see [https://discourse.nixos.org/t/how-to-use-uutils-coreutils-instead-of-the-builtin-coreutils/8904/36?u=malix NixOS - Discourse: "How to use uutils-coreutils instead of the builtin coreutils?" (8904) - Comment 36]</small>}}
[[Category:CLI_Applications]]
[[Category:Applications]]
[[Category:Rust]]]
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