Add brew formula

README.md

@@ -39,7 +39,13 @@ single independent executable for Linux.
 For a more permanent installation, you could [install Sausagewiki as a systemd
 service](https://github.com/maghoff/sausagewiki/wiki/System-wide-installation-with-systemd).
 
-Alternatively, you could build it from source code with `cargo build`.
+Alternative installation methods include the following:
+
+**Build from source** with `cargo build`. This requires you to have a working
+installation of [rust](https://www.rust-lang.org/en-US/).
+
+**Install with [Homebrew](https://brew.sh/)** on OS X/macOS:
+`brew install --HEAD https://raw.githubusercontent.com/maghoff/sausagewiki/master/deploy/sausagewiki.rb`
 
 Command line arguments
 ----------------------

deploy/sausagewiki.rb

@@ -0,0 +1,16 @@
+class Sausagewiki < Formula
+  desc "A simple, self-contained Wiki engine"
+  homepage "https://github.com/maghoff/sausagewiki/"
+  head "https://github.com/maghoff/sausagewiki.git"
+
+  depends_on "rust" => :build
+
+  def install
+    system "cargo", "build", "--release"
+    bin.install "target/release/sausagewiki"
+  end
+
+  test do
+    system "#{bin}/sausagewiki", "--version"
+  end
+end