rewatch: init at 1.0.9

see release: https://github.com/rescript-lang/rewatch/releases/tag/v1.0.9

pkgs/development/tools/rescript/rewatch/default.nix

@@ -0,0 +1,33 @@
+{
+  lib,
+  rustPlatform,
+  fetchFromGitHub,
+  nix-update-script,
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "rewatch";
+  version = "1.0.9";
+
+  src = fetchFromGitHub {
+    owner = "rescript-lang";
+    repo = "rewatch";
+    rev = "v${version}";
+    hash = "sha256-y+0tBwGa7Fjrnd3O7CwZjapgXJojfgXBZyqAW3cz1Zk=";
+  };
+
+  cargoHash = "sha256-cZTA50gm7o+vBaRNjpZI0LQkXaHIukVTBXoYMUubZgw=";
+
+  doCheck = true;
+
+  passthru.updateScript = nix-update-script { };
+
+  meta = {
+    description = "Alternative build system for the Rescript Compiler.";
+    homepage = "https://github.com/rescript-lang/rewatch";
+    changelog = "https://github.com/rescript-lang/rewatch/releases/tag/v${version}";
+    mainProgram = "rewatch";
+    maintainers = with lib.maintainers; [ r17x ];
+    license = lib.licenses.mit;
+  };
+}