htslib: import from homebrew/science

Closes #18733.

Signed-off-by: JCount <JCount42@gmail.com>

Formula/htslib.rb

@@ -0,0 +1,24 @@
+class Htslib < Formula
+  desc "C library for high-throughput sequencing data formats"
+  homepage "http://www.htslib.org/"
+  url "https://github.com/samtools/htslib/releases/download/1.6/htslib-1.6.tar.bz2"
+  sha256 "9588be8be0c2390a87b7952d644e7a88bead2991b3468371347965f2e0504ccb"
+  revision 1
+
+  depends_on "xz"
+
+  def install
+    system "./configure", "--prefix=#{prefix}"
+    system "make", "install"
+    pkgshare.install "test"
+  end
+
+  test do
+    sam = pkgshare/"test/ce#1.sam"
+    assert_match "SAM", shell_output("#{bin}/htsfile #{sam}")
+    system "#{bin}/bgzip -c #{sam} > sam.gz"
+    assert_predicate testpath/"sam.gz", :exist?
+    system "#{bin}/tabix", "-p", "sam", "sam.gz"
+    assert_predicate testpath/"sam.gz.tbi", :exist?
+  end
+end