Add rbx Formula.

Author: brixen

Formula/rbx.rb

@@ -0,0 +1,23 @@
+class Rbx < Formula
+  desc "Rubinius Language Platform compiler and runtime"
+  homepage "https://github.com/rubinius/rbx"
+  url "https://github.com/rubinius/rbx/archive/refs/tags/v26.0.tar.gz"
+  sha256 "5bbc588ff47ba6aed128a7bb947547de0bbf2587595a26928390c0ebaba4ce8d"
+  license "BSD-3-Clause"
+
+  depends_on "build2" => :build
+  depends_on "make" => [:build, :test]
+
+  def install
+    system "make", "setup"
+    system "make", "config"
+    system "make", "build"
+
+    # Not in Makefile because installation specific
+    system "b", "install", "config.install.root=#{prefix}"
+  end
+
+  test do
+    system "make", "test"
+  end
+end