guetzli 1.0 (new formula)

Closes #11190.

Signed-off-by: FX Coudert <fxcoudert@gmail.com>

Formula/guetzli.rb

@@ -0,0 +1,28 @@
+class Guetzli < Formula
+  desc "Perceptual JPEG encoder"
+  homepage "https://github.com/google/guetzli"
+  url "https://github.com/google/guetzli/archive/v1.0.tar.gz"
+  sha256 "9766353d4bcfb9ea1c4018770d23a321986cdf1544d0805d14361686d7592c92"
+
+  head "https://github.com/google/guetzli.git"
+
+  depends_on "libpng"
+  depends_on "gflags"
+
+  # Linker fails with atom not found in symbolIndex on Yosemite
+  depends_on :macos => :el_capitan
+
+  resource "test_image" do
+    url "https://github.com/google/guetzli/releases/download/v1.0/bees.png"
+    sha256 "2c1784bf4efb90c57f00a3ab4898ac8ec4784c60d7a0f70d2ba2c00af910520b"
+  end
+
+  def install
+    system "make"
+    bin.install "bin/Release/guetzli"
+  end
+
+  test do
+    resource("test_image").stage { system "#{bin}/guetzli", "bees.png", "bees.jpg" }
+  end
+end