>From e7d84066efe5857581c1d03be5dfda95c1541462 Mon Sep 17 00:00:00 2001
From: Roel Janssen <address@hidden>
Date: Fri, 22 Apr 2016 09:35:47 +0200
Subject: [PATCH] gnu: Add multichoose.

* gnu/packages/bioinformatics.scm (multichoose): New variable.
---
 gnu/packages/bioinformatics.scm | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index d3895fd..41493ca 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -5108,3 +5108,38 @@ group or two ChIP groups run under different conditions.")
    (description "This is a C++ wrapper around the Tabix project which abstracts
 some of the details of opening and jumping in Tabix-indexed files.")
    (license license:expat)))
+
+(define-public multichoose
+  (package
+    (name "multichoose")
+    (version "1.0.3")
+    (source (origin
+      (method url-fetch)
+      (uri (string-append "https://github.com/ekg/multichoose/archive/v"
+                          version ".tar.gz"))
+      (file-name (string-append name "-" version ".tar.gz"))
+      (sha256
+       (base32 "0xy86vvr3qrs4l81qis7ia1q2hnqv0xcb4a1n60smxbhqqis5w3l"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:tests? #f ; There are no tests to run.
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'configure) ; There is no configure phase.
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((bin (string-append (assoc-ref outputs "out") "/bin")))
+               (install-file "multichoose" bin)
+               (install-file "multipermute" bin)))))))
+    (native-inputs
+     `(("python" ,python-2)
+       ("node" ,node)))
+    (home-page "https://github.com/ekg/multichoose")
+    (synopsis "Library for a loopless multiset combination generation
+algorithm")
+    (description "This package provides a library implementing an efficient
+loopless multiset combination generation algorithm which is (approximately)
+described in \"Loopless algorithms for generating permutations, combinations,
+and other combinatorial configurations.\" G Ehrlich - Journal of the ACM (JACM),
+1973. (Algorithm 7.)")
+    (license license:expat)))
-- 
2.5.5