Add `nixfmt`

Change-Id: I7f21695e3971cfd02b2cce0dd016ff6eb3389905

1 files changed, 65 insertions, 0 deletions

diff --git a/nix-support/nixfmt.nix b/nix-support/nixfmt.nix
new file mode 100644
index 000000000..b51e26295
--- /dev/null
+++ b/nix-support/nixfmt.nix
@@ -0,0 +1,65 @@
+# Copy of `nixfmt-rfc-style` vendored from `nixpkgs` master:
+# https://github.com/NixOS/nixpkgs/blob/ab6071eb54cc9b66dda436111d4f569e4e56cbf4/pkgs/by-name/ni/nixfmt-rfc-style/package.nix
+{
+  haskell,
+  haskellPackages,
+  fetchFromGitHub,
+}:
+let
+  inherit (haskell.lib.compose) justStaticExecutables;
+  raw-pkg = haskellPackages.callPackage (
+    {
+      mkDerivation,
+      base,
+      cmdargs,
+      directory,
+      fetchzip,
+      filepath,
+      lib,
+      megaparsec,
+      mtl,
+      parser-combinators,
+      safe-exceptions,
+      scientific,
+      text,
+      transformers,
+      unix,
+    }:
+    mkDerivation {
+      pname = "nixfmt";
+      version = "0.6.0-unstable-2024-03-14";
+      src = fetchFromGitHub {
+        owner = "serokell";
+        repo = "nixfmt";
+        rev = "8d13b593fa8d8d6e5075f541f3231222a08e84df";
+        hash = "sha256-HtXvzmfN4wk45qiKZ7V+/5WBV7jnTHfd7iBwF4XGl64=";
+      };
+      isLibrary = true;
+      isExecutable = true;
+      libraryHaskellDepends = [
+        base
+        megaparsec
+        mtl
+        parser-combinators
+        scientific
+        text
+        transformers
+      ];
+      executableHaskellDepends = [
+        base
+        cmdargs
+        directory
+        filepath
+        safe-exceptions
+        text
+        unix
+      ];
+      jailbreak = true;
+      homepage = "https://github.com/serokell/nixfmt";
+      description = "An opinionated formatter for Nix";
+      license = lib.licenses.mpl20;
+      mainProgram = "nixfmt";
+    }
+  ) { };
+in
+justStaticExecutables raw-pkg