nifi 0.2.1 (new formula)

Closes Homebrew/homebrew#43153.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

Formula/nifi.rb

@@ -0,0 +1,21 @@
+class Nifi < Formula
+  desc "Easy to use, powerful, and reliable system to process and distribute data."
+  homepage "https://nifi.apache.org"
+  url "https://www.apache.org/dyn/closer.cgi?path=/nifi/0.2.1/nifi-0.2.1-bin.tar.gz"
+  sha256 "e151dab553a8ea466f7462d75145e2aa08ced938499aef184850aa4d3209c605"
+
+  depends_on :java => "1.7+"
+
+  def install
+    libexec.install Dir["*"]
+
+    ENV["NIFI_HOME"] = libexec
+
+    bin.install libexec/"bin/nifi.sh" => "nifi"
+    bin.env_script_all_files libexec/"bin/", :NIFI_HOME => libexec
+  end
+
+  test do
+    system bin/"nifi", "status"
+  end
+end