release notes: 2.27.0

doc/manual/source/release-notes/rl-2.27.md

@@ -0,0 +1,38 @@
+# Release 2.27.0 (2025-02-26)
+
+- Set FD_CLOEXEC on sockets created by curl [#12439](https://github.com/NixOS/nix/pull/12439)
+
+  Curl creates sockets without setting FD_CLOEXEC/SOCK_CLOEXEC, this can cause connections to remain open forever when using commands like `nix shell`
+
+  This change sets the FD_CLOEXEC flag using a CURLOPT_SOCKOPTFUNCTION callback.
+
+- Git LFS support [#10153](https://github.com/NixOS/nix/pull/10153) [#12468](https://github.com/NixOS/nix/pull/12468)
+
+  The Git fetcher now supports Large File Storage (LFS). This can be enabled by passing the attribute `lfs = true` to the fetcher, e.g.
+  ```console
+  nix flake prefetch 'git+ssh://git@github.com/Apress/repo-with-large-file-storage.git?lfs=1'
+  ```
+
+  A flake can also declare that it requires lfs to be enabled:
+  ```
+  {
+    inputs.self.lfs = true;
+  }
+  ```
+
+  Author: [**@b-camacho**](https://github.com/b-camacho), [**@kip93**](https://github.com/kip93)
+
+- `inputs.self.submodules` flake attribute [#12421](https://github.com/NixOS/nix/pull/12421)
+
+  Flakes in Git repositories can now declare that they need Git submodules to be enabled:
+  ```
+  {
+    inputs.self.submodules = true;
+  }
+  ```
+  Thus, it's no longer needed for the caller of the flake to pass `submodules = true`.
+
+
+# Contributors
+
+Querying GitHub API for 5cf9e18167b86f39864e39e5fe129e5f6c1a15e0, to get handle for fabianm88@gmail.com