genometools: import from homebrew/science

Closes #21573.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Formula/genometools.rb

@@ -0,0 +1,32 @@
+class Genometools < Formula
+  desc "GenomeTools: The versatile open source genome analysis software"
+  homepage "http://genometools.org/"
+  url "http://genometools.org/pub/genometools-1.5.10.tar.gz"
+  sha256 "0208591333b74594bc219fb67f5a29b81bb2ab872f540c408ac1743716274e6a"
+  head "https://github.com/genometools/genometools.git"
+
+  depends_on "pkg-config" => :build
+  depends_on "cairo"
+  depends_on "pango"
+  depends_on :python if MacOS.version <= :snow_leopard
+
+  def install
+    system "make", "prefix=#{prefix}"
+    system "make", "install", "prefix=#{prefix}"
+
+    cd "gtpython" do
+      # Use the shared library from this specific version of genometools.
+      inreplace "gt/dlload.py",
+        "gtlib = CDLL(\"libgenometools\" + soext)",
+        "gtlib = CDLL(\"#{lib}/libgenometools\" + soext)"
+
+      system "python", *Language::Python.setup_install_args(prefix)
+      system "python", "-m", "unittest", "discover", "tests"
+    end
+  end
+
+  test do
+    system "#{bin}/gt", "-test"
+    system "python", "-c", "import gt"
+  end
+end