pyrefly: init at 0.17.1 (#412863)

maintainers/maintainer-list.nix

@@ -5354,6 +5354,11 @@
     githubId = 16950437;
     name = "cwyc";
   };
+  cybardev = {
+    name = "Sheikh";
+    github = "cybardev";
+    githubId = 50134239;
+  };
   cybershadow = {
     name = "Vladimir Panteleev";
     email = "nixpkgs@cy.md";
@@ -20516,6 +20521,11 @@
     githubId = 39039420;
     name = "Quinn Dougherty";
   };
+  QuiNzX = {
+    name = "QuiNz-";
+    github = "QuiNzX";
+    githubId = 76129478;
+  };
   quodlibetor = {
     email = "quodlibetor@gmail.com";
     github = "quodlibetor";

pkgs/by-name/py/pyrefly/package.nix

@@ -0,0 +1,51 @@
+{
+  lib,
+  python3,
+  fetchPypi,
+  versionCheckHook,
+  nix-update-script,
+  rustPlatform,
+  maturin,
+}:
+python3.pkgs.buildPythonApplication rec {
+  pname = "pyrefly";
+  version = "0.17.1";
+  pyproject = true;
+
+  # fetch from PyPI instead of GitHub, since source repo does not have Cargo.lock
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-w4ivRtmApXiXQT95GI4vvYBop7yxdbbkpW+YTyFtgXM=";
+  };
+
+  cargoDeps = rustPlatform.fetchCargoVendor {
+    inherit src;
+    hash = "sha256-Op5ueVkzZTiJ1zeBGVi8oeLcfSzXMYfk5zEg4OGyA5g=";
+  };
+
+  build-system = [ maturin ];
+
+  nativeBuildInputs = with rustPlatform; [
+    cargoSetupHook
+    maturinBuildHook
+  ];
+
+  nativeCheckInputs = [ versionCheckHook ];
+
+  # requires unstable rust features
+  env.RUSTC_BOOTSTRAP = 1;
+
+  passthru.updateScript = nix-update-script { };
+
+  meta = {
+    description = "Fast type checker and IDE for Python";
+    homepage = "https://github.com/facebook/pyrefly";
+    license = lib.licenses.mit;
+    mainProgram = "pyrefly";
+    platforms = lib.platforms.linux ++ lib.platforms.darwin;
+    maintainers = with lib.maintainers; [
+      cybardev
+      QuiNzX
+    ];
+  };
+}