unionfs-fuse: add 2.1 bottle.

Formula/unionfs-fuse.rb

@@ -0,0 +1,40 @@
+require_relative "../require/macfuse"
+
+class UnionfsFuse < Formula
+  desc "Union filesystem using FUSE"
+  homepage "https://github.com/rpodgorny/unionfs-fuse"
+  url "https://github.com/rpodgorny/unionfs-fuse/archive/refs/tags/v2.1.tar.gz"
+  sha256 "c705072a33a18cbc73ffe799331d43410b6deef5d6f2042038f8fd3ab17b6e2e"
+  license "BSD-3-Clause"
+
+  bottle do
+    root_url "https://github.com/gromgit/homebrew-fuse/releases/download/unionfs-fuse-2.1"
+    sha256 cellar: :any, monterey: "0c1c5cd2c5fba1a924e5cf6f9b1435cb8920c48eb87d6b7f434829dc19064227"
+  end
+
+  depends_on MacfuseRequirement
+
+  def install
+    setup_fuse
+    system "make", "PREFIX=#{prefix}", "install"
+  end
+
+  test do
+    (testpath/"t1").mkdir
+    (testpath/"t1/test1.txt").write <<~EOS
+      This is test 1.
+    EOS
+    (testpath/"t2").mkdir
+    (testpath/"t2/test2.txt").write <<~EOS
+      This is test 2.
+    EOS
+    (testpath/"t3").mkdir
+    begin
+      system "#{bin}/unionfs", "-o", "cow,max_files=32768,allow_other,use_ino,nonempty",
+             "#{testpath}/t1=RW:#{testpath}/t2=RO", testpath/"t3"
+      assert_match "test 2", pipe_output("cat #{testpath}/t3/test2.txt")
+    ensure
+      system "umount #{testpath}/t3"
+    end
+  end
+end