Add Azul's Zulu JDK bundle

Zulu is a supported release of OpenJDK published by Azul systems.

Casks/zulu.rb

@@ -0,0 +1,53 @@
+cask 'zulu' do
+  version '1.8.0_72,8.13.0.5'
+  sha256 '1e6ab8b4660ad50248d5e1c9568566bb2d6206788d4ff913d6539b47520da0ac'
+
+  url "http://cdn.azul.com/zulu/bin/zulu#{version.after_comma}-jdk#{version[2..7].underscores_to_dots}-macosx_x64.dmg",
+      referer: 'http://www.azul.com/downloads/zulu/zulu-mac/'
+  name 'Azul Zulu Java Standard Edition Development Kit'
+  homepage 'http://www.azul.com/downloads/zulu/zulu-mac/'
+  license :gratis
+
+  conflicts_with cask: 'java'
+
+  pkg "Double-Click to Install Zulu #{version.minor}.pkg"
+
+  postflight do
+    system '/usr/bin/sudo', '-E', '--',
+           '/bin/mv', '-f', '--', "/Library/Java/JavaVirtualMachines/zulu-#{version.minor}.jdk", "/Library/Java/JavaVirtualMachines/zulu#{version.before_comma}.jdk"
+    system '/usr/bin/sudo', '-E', '--',
+           '/bin/ln', '-nsf', '--', "/Library/Java/JavaVirtualMachines/zulu#{version.before_comma}.jdk", "/Library/Java/JavaVirtualMachines/zulu-#{version.minor}.jdk"
+    system '/usr/bin/sudo', '-E', '--',
+           '/bin/ln', '-nsf', '--', "/Library/Java/JavaVirtualMachines/zulu#{version.before_comma}.jdk/Contents/Home", '/Library/Java/Home'
+    if MacOS.release <= :mavericks
+      system '/usr/bin/sudo', '-E', '--',
+             '/bin/rm', '-rf', '--', '/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK'
+      system '/usr/bin/sudo', '-E', '--',
+             '/bin/ln', '-nsf', '--', "/Library/Java/JavaVirtualMachines/zulu#{version.before_comma}.jdk/Contents", '/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK'
+    end
+  end
+
+  uninstall pkgutil: [
+                       "com.azulsystems.zulu.#{version.minor}",
+                     ],
+            delete:  [
+                       "/Library/Java/JavaVirtualMachines/zulu#{version.before_comma}.jdk",
+                       "/Library/Java/JavaVirtualMachines/zulu-#{version.minor}.jdk",
+                       '/Library/Java/Home',
+                       if MacOS.release <= :mavericks
+                         [
+                           '/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK',
+                         ]
+                       end,
+                     ].keep_if { |v| !v.nil? }
+
+  caveats <<-EOS.undent
+    If this cask is upgraded, previous stale versions will be left under
+    'Caskroom/zulu/{version}'. Stale versions may also be left under
+    '/Library/Java/JavaVirtualMachines/zulu{version}.jdk'. Removing them may
+    require manual deletion, e.g.
+
+      rm -rf /opt/homebrew-cask/Caskroom/zulu/
+      rm -rf /Library/Java/JavaVirtualMachines/zulu*.jdk
+  EOS
+end