nixVersions.git: 2025-04-07 -> 2025-04-09

This adds the nix-fetchers-c library (C API) which may be of interest.
Technically, since 2.28 is not packaged with these files at this time,
the conditionals are redundant, but I'd like this commit to serve as a
blueprint for future updates, and I'd like to keep options open for
2.28 packaging.

pkgs/tools/package-management/nix/default.nix

···
       };
 
       nixComponents_git = nixDependencies.callPackage ./modular/packages.nix rec {
-        version = "2.29pre20250407_${lib.substring 0 8 src.rev}";
+        version = "2.29pre20250409_${lib.substring 0 8 src.rev}";
         inherit (self.nix_2_24.meta) maintainers;
         otherSplices = generateSplicesForNixComponents "nixComponents_git";
         src = fetchFromGitHub {
           owner = "NixOS";
           repo = "nix";
-          rev = "73d3159ba0b4b711c1f124a587f16e2486d685d7";
-          hash = "sha256-9wJXUGqXIqMjNyKWJKCcxrDHM/KxDkvJMwo6S3s+WuM=";
+          rev = "e76bbe413e86e3208bb9824e339d59af25327101";
+          hash = "sha256-Aqnj5+sA7B4ZRympuyfWPPK83iomKHEHMYhlwslI8iA=";
         };
       };
 

pkgs/tools/package-management/nix/modular/packaging/components.nix

···
       }
     );
 
+  whenAtLeast = v: thing: if lib.versionAtLeast version v then thing else null;
+
 in
 
 # This becomes the pkgs.nixComponents attribute set
···
   nix-store-tests = callPackage ../src/libstore-tests/package.nix { };
 
   nix-fetchers = callPackage ../src/libfetchers/package.nix { };
+  ${whenAtLeast "2.29pre" "nix-fetchers-c"} = callPackage ../src/libfetchers-c/package.nix { };
   nix-fetchers-tests = callPackage ../src/libfetchers-tests/package.nix { };
 
   nix-expr = callPackage ../src/libexpr/package.nix { };

pkgs/tools/package-management/nix/modular/packaging/everything.nix

···
 
   maintainers,
 
+  version,
+
   nix-util,
   nix-util-c,
   nix-util-tests,
···
   nix-store-tests,
 
   nix-fetchers,
+  nix-fetchers-c,
   nix-fetchers-tests,
 
   nix-expr,
···
         nix-cmd
         ;
     }
-    // lib.optionalAttrs
-      (!stdenv.hostPlatform.isStatic && stdenv.buildPlatform.canExecute stdenv.hostPlatform)
-      {
-        # Currently fails in static build
-        inherit
-          nix-perl-bindings
-          ;
-      };
+    // lib.optionalAttrs (lib.versionAtLeast version "2.29pre") {
+      inherit
+        nix-fetchers-c
+        ;
+    }
+    //
+      lib.optionalAttrs
+        (!stdenv.hostPlatform.isStatic && stdenv.buildPlatform.canExecute stdenv.hostPlatform)
+        {
+          # Currently fails in static build
+          inherit
+            nix-perl-bindings
+            ;
+        };
 
   devdoc = buildEnv {
     name = "nix-${nix-cli.version}-devdoc";
···
       "out"
       "man"
     ];
-    pkgConfigModules = [
-      "nix-cmd"
-      "nix-expr"
-      "nix-expr-c"
-      "nix-fetchers"
-      "nix-flake"
-      "nix-flake-c"
-      "nix-main"
-      "nix-main-c"
-      "nix-store"
-      "nix-store-c"
-      "nix-util"
-      "nix-util-c"
-    ];
+    pkgConfigModules =
+      [
+        "nix-cmd"
+        "nix-expr"
+        "nix-expr-c"
+        "nix-fetchers"
+      ]
+      ++ lib.optionals (lib.versionAtLeast version "2.29pre") [
+        "nix-fetchers-c"
+      ]
+      ++ [
+        "nix-flake"
+        "nix-flake-c"
+        "nix-main"
+        "nix-main-c"
+        "nix-store"
+        "nix-store-c"
+        "nix-util"
+        "nix-util-c"
+      ];
   };
 
 })

pkgs/tools/package-management/nix/modular/src/libfetchers-c/package.nix

···
+{
+  lib,
+  mkMesonLibrary,
+
+  nix-store-c,
+  nix-expr-c,
+  nix-util-c,
+  nix-fetchers,
+
+  # Configuration Options
+
+  version,
+}:
+
+mkMesonLibrary (finalAttrs: {
+  pname = "nix-fetchers-c";
+  inherit version;
+
+  workDir = ./.;
+
+  propagatedBuildInputs = [
+    nix-util-c
+    nix-expr-c
+    nix-store-c
+    nix-fetchers
+  ];
+
+  mesonFlags = [ ];
+
+  meta = {
+    platforms = lib.platforms.unix ++ lib.platforms.windows;
+  };
+
+})

pkgs/tools/package-management/nix/modular/src/libfetchers-tests/package.nix

···
   mkMesonExecutable,
 
   nix-fetchers,
+  nix-fetchers-c,
   nix-store-test-support,
 
   libgit2,
···
       nix-store-test-support
       rapidcheck
       gtest
+    ]
+    ++ lib.optionals (lib.versionAtLeast version "2.29pre") [
+      nix-fetchers-c
     ]
     ++ lib.optionals (lib.versionAtLeast version "2.27") [
       libgit2

pkgs/tools/package-management/nix/modular/src/libflake-c/package.nix

···
 
   nix-store-c,
   nix-expr-c,
+  nix-fetchers-c,
   nix-flake,
 
   # Configuration Options
···
 
   workDir = ./.;
 
-  propagatedBuildInputs = [
-    nix-expr-c
-    nix-store-c
-    nix-flake
-  ];
+  propagatedBuildInputs =
+    [
+      nix-expr-c
+      nix-store-c
+    ]
+    ++ lib.optionals (lib.versionAtLeast version "2.29pre") [
+      nix-fetchers-c
+    ]
+    ++ [
+      nix-flake
+    ];
 
   mesonFlags = [
   ];