mahout 0.8

Closes Homebrew/homebrew#23846.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/mahout.rb

@@ -0,0 +1,37 @@
+require 'formula'
+
+class Mahout < Formula
+  homepage 'http://mahout.apache.org/'
+  head 'http://svn.apache.org/repos/asf/mahout/trunk'
+  url 'http://apache.cs.utah.edu/mahout/0.8/mahout-distribution-0.8.tar.gz'
+  sha1 '67669fa4a8969a8b8c6ebb94fa7f5aeae96e9119'
+
+  depends_on 'maven' => :build
+  depends_on 'hadoop'
+
+  def install
+    if build.head?
+      system 'chmod 755 ./bin'
+      system 'mvn -DskipTests clean install'
+    end
+
+    libexec.install %w[bin]
+
+    if build.head?
+      libexec.install Dir['buildtools/target/*.jar']
+      libexec.install Dir['core/target/*.jar']
+      libexec.install Dir['examples/target/*.jar']
+      libexec.install Dir['math/target/*.jar']
+    else
+      libexec.install Dir['*.jar']
+    end
+
+    bin.write_exec_script Dir["#{libexec}/bin/*"]
+  end
+
+  def caveats; <<-EOS.undent
+    Mahout requires JAVA_HOME to be set:
+      export JAVA_HOME=$(/usr/libexec/java_home)
+    EOS
+  end
+end