gnu: Add bio-locus.

* gnu/packages/bioinformatics.scm (bio-locus): New variable.

gnu/packages/bioinformatics.scm

@@ -27,6 +27,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system perl)
   #:use-module (guix build-system python)
+  #:use-module (guix build-system ruby)
   #:use-module (guix build-system trivial)
   #:use-module (gnu packages)
   #:use-module (gnu packages algebra)
@@ -45,6 +46,7 @@
   #:use-module (gnu packages popt)
   #:use-module (gnu packages protobuf)
   #:use-module (gnu packages python)
+  #:use-module (gnu packages ruby)
   #:use-module (gnu packages statistics)
   #:use-module (gnu packages tbb)
   #:use-module (gnu packages textutils)
@@ -2616,3 +2618,27 @@ data in the form of VCF files.")
     ;; The license is declared as LGPLv3 in the README and
     ;; at http://vcftools.sourceforge.net/license.html
     (license license:lgpl3)))
+
+(define-public bio-locus
+  (package
+    (name "bio-locus")
+    (version "0.0.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (rubygems-uri "bio-locus" version))
+       (sha256
+        (base32
+         "02vmrxyimkj9sahsp4zhfhnmbvz6dbbqz1y01vglf8cbwvkajfl0"))))
+    (build-system ruby-build-system)
+    (native-inputs
+     `(("ruby-rspec" ,ruby-rspec)))
+    (synopsis "Tool for fast querying of genome locations")
+    (description
+     "Bio-locus is a tabix-like tool for fast querying of genome
+locations.  Many file formats in bioinformatics contain records that
+start with a chromosome name and a position for a SNP, or a start-end
+position for indels.  Bio-locus allows users to store this chr+pos or
+chr+pos+alt information in a database.")
+    (home-page "https://github.com/pjotrp/bio-locus")
+    (license license:expat)))