;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2019 Nicolas Goaziou <mail@nicolasgoaziou.fr>
;;; Copyright © 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
;;; Copyright © 2021 Efraim Flashner <efraim@flashner.co.il>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages sagemath)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix build-system cmake)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system python)
  #:use-module (guix build-system trivial)
  #:use-module (guix download)
  #:use-module (guix gexp)
  #:use-module (guix git-download)
  #:use-module (guix packages)
  #:use-module (guix utils)
  #:use-module (gnu packages)
  #:use-module (gnu packages algebra)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bdw-gc)
  #:use-module (gnu packages boost)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages image)
  #:use-module (gnu packages lisp)
  #:use-module (gnu packages maths)
  #:use-module (gnu packages multiprecision)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages popt)
  #:use-module (gnu packages python)
  #:use-module (gnu packages python-xyz))


(define-public python-cypari2
  (package
    (name "python-cypari2")
    (version "2.1.2")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri "cypari2" version))
       (sha256
        (base32
         "0ymc4i9y60aazscc1blivirkr1rflzz6akkmvfzyn5l7mgnlbk83"))))
    (build-system python-build-system)
    (native-inputs
     (list python-cython))
    (propagated-inputs
     (list python-cysignals))
    (inputs
     (list gmp pari-gp))
    (home-page "https://cypari2.readthedocs.io/")
    (synopsis
     "Python interface to the number theory library libpari")
    (description
     "Cypari2 provides a Python interface to the number theory library
PARI/GP.  It has been spun off from the SageMath mathematics software system,
but it can be used independently.")
    (license license:gpl2+)))

;; The stable version of the following package is not young enough to be
;; used with Sage, since it does not support cython; so we use a beta
;; release.
(define-public python-gmpy2
  (package
    (name "python-gmpy2")
    (version "2.1.0b1")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/aleaxit/gmpy")
                    (commit (string-append "gmpy2-" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "0ljvnmhxqdfsp0yy4c2hynhk5sggm63kkqsq4iwq4k9vsnx2xm97"))))
    (build-system python-build-system)
    (native-inputs
     (list unzip))
    (inputs
     (list gmp mpfr mpc))
    (home-page "https://github.com/aleaxit/gmpy")
    (synopsis
     "GMP/MPIR, MPFR, and MPC interface to Python 2.6+ and 3.x")
    (description
     "This package provides a Python interface to the GNU multiprecision
libraries GMO, MPFR and MPC.")
    (license license:lgpl3+)))

(define-public cliquer
  (package
    (name "cliquer")
    (version "1.22")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/dimpase/autocliquer")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "00gcmrhi2fjn8b246w5a3b0pl7p6haxy5wjvd9kcqib1xanz59z4"))))
    (build-system gnu-build-system)
    (native-inputs (list autoconf automake libtool))
    (synopsis "C routines for finding cliques in weighted graphs")
    (description "Cliquer is a set of reentrant C routines for finding
cliques in a weighted or unweighted graph.  It uses an exact
branch-and-bound algorithm.  It can search for maximum or maximum-weight
cliques or cliques with size or weight within a given range, restrict the
search to maximal cliques, store cliques in memory and call a user-defined
function for every found clique.")
    (license license:gpl2+)
    (home-page "https://github.com/dimpase/autocliquer")))

(define-public libbraiding
  (package
    (name "libbraiding")
    (version "1.0")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
              (url (string-append "https://github.com/miguelmarco/"
                                  name))
              (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "0l68rikfr7k2l547gb3pp3g8cj5zzxwipm79xrb5r8ffj466ydxg"))))
    (build-system gnu-build-system)
    (native-inputs
     (list autoconf automake libtool))
    (synopsis "Computations with braid groups")
    (description "libbraiding performs computations with braid groups,
in particular it computes normal forms of group elements.")
    (license license:gpl2+)
    (home-page "https://github.com/miguelmarco/libbraiding")))

(define-public libhomfly
  (package
    (name "libhomfly")
    (version "1.02r6")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
              (url (string-append "https://github.com/miguelmarco/"
                                  name))
              (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "0sv3cwrf9v9sb5a8wbhjmarxvya13ma3j8y8592f9ymxlk5y0ldk"))))
    (build-system gnu-build-system)
    (native-inputs
     (list autoconf automake libtool))
    (inputs
     (list libgc))
    (synopsis "Computation of homfly polynomials of links")
    (description "libhomfly computes homfly polynomials of links,
represented as strings.")
    (license license:public-domain)
    (home-page "https://github.com/miguelmarco/libhomfly")))

(define-public pynac
  (package
    (name "pynac")
    (version "0.7.26")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
              (url "https://github.com/pynac/pynac/")
              (commit (string-append "pynac-" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "09d2p74x1arkydlxy6pw4p4byi7r8q7f29w373h4d8a215kadc6d"))))
    (build-system gnu-build-system)
    (native-inputs
     (list autoconf automake libtool pkg-config))
    (inputs
     (list flint gmp python singular))
    (synopsis "Sage fork of GiNaC")
    (description "Pynac is a derivative of the C++ library GiNaC, which
allows manipulation of symbolic expressions.  It currently provides the
backend for symbolic expressions in Sage.  The main difference between
Pynac and GiNaC is that Pynac relies on Sage to provide the operations
on numerical types, while GiNaC depends on CLN for this purpose.")
    (license license:gpl2+)
    (home-page "http://pynac.org/")))

;; Sage has become upstream of the following package.
(define-public zn-poly
  (package
    (name "zn-poly")
    (version "0.9.2")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
              (url (string-append "https://gitlab.com/sagemath/"
                                  "zn_poly.git/"))
              (commit version)))
       (file-name (git-file-name "zn_poly" version))
       (sha256
        (base32 "1wbc3apxcldxfcw1dnwnn7fvlfb6bwvlr8glvgv6hf79p9r2s4j0"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("python" ,python-2)))
    (inputs
     (list gmp))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (replace 'configure
           ;; The configure script chokes on --enable-fast-install.
           (lambda* (#:key inputs outputs #:allow-other-keys)
             (invoke "./configure"
                     (string-append "--prefix=" (assoc-ref outputs "out"))
                     "--cflags=-O3 -fPIC")))
         (add-before 'build 'prepare-build
           (lambda _
             (setenv "CC" "gcc")
             #t))
         (add-after 'build 'build-so
           (lambda _
             (invoke "make" "libzn_poly.so")))
         (add-after 'install 'install-so
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (lib (string-append out "/lib"))
                    (soname (string-append "libzn_poly-" ,version ".so"))
                    (target (string-append lib "/" soname)))
               (install-file "libzn_poly.a" lib)
               (install-file soname lib)
               (symlink target
                        (string-append lib "/libzn_poly.so"))
               (symlink target
                        (string-append lib "/libzn_poly-"
                                       ,(version-major+minor version)
                                       ".so")))
             #t)))))
    (synopsis "Arithmetic for polynomials over Z/NZ")
    (description "zn_poly implements the arithmetic of polynomials the
coefficients of which are modular integers.")
    (license (list license:gpl2 license:gpl3)) ; dual licensed
    (home-page "https://gitlab.com/sagemath/zn_poly")))

(define-public brial
  (package
    (name "brial")
    (version "1.2.8")
    (source
    (origin
      (method git-fetch)
      (uri (git-reference
             (url "https://github.com/BRiAl/BRiAl/")
             (commit version)))
      (file-name (git-file-name name version))
      (sha256
       (base32 "0qhgckd4fvbs40jw14mvw89rccv94d3df27kipd27hxd4cx7y80y"))))
    (build-system gnu-build-system)
    (native-inputs
     (list autoconf automake libtool pkg-config))
    (inputs
     (list boost libpng m4ri))
    (arguments
    ;; We are missing the boost unit test framework.
     `(#:tests? #f
       #:configure-flags (list "--without-boost-unit-test-framework")))
    (synopsis "Arithmetic of polynomials over boolean rings")
    (description "BRiAl is the successor to  PolyBoRi maintained by the
Sage community.  Its core is a C++ library, which provides high-level data
types for Boolean polynomials and monomials, exponent vectors, as well as
for the underlying polynomial rings and subsets of the powerset of the
Boolean variables.  As a unique approach, binary decision diagrams are
used as internal storage type for polynomial structures.")
    (license license:gpl2+)
    (home-page "https://github.com/BRiAl/BRiAl/")))

(define-public lcalc
  (package
    (name "lcalc")
    (version "2.0.5")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://gitlab.com/sagemath/lcalc")
                    (commit version)))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1rwyx292y3jbsp88wagn9nhl9z7wsnl2yrs5imxkbxq87pnrj5a7"))))
    (build-system gnu-build-system)
    (arguments
     (list #:configure-flags '(list "--with-pari")))
    (inputs (list pari-gp))
    (native-inputs (list autoconf automake libtool pkg-config gengetopt))
    (home-page "https://gitlab.com/sagemath/lcalc")
    (synopsis "C++ library for with L-functions")
    (description
     "Lcalc computes L-functions, in particular the Riemann zeta function and its
twists by quadratic characters.")
    (license license:gpl2+)))

(define-public ratpoints
  (package
    (name "ratpoints")
    (version "2.1.3")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://www.mathe2.uni-bayreuth.de/stoll/programs/"
                    "ratpoints-" version ".tar.gz"))
              (sha256
               (base32
                "0zhad84sfds7izyksbqjmwpfw4rvyqk63yzdjd3ysd32zss5bgf4"))
              (patches
               ;; Taken from
               ;; <https://git.sagemath.org/sage.git/plain/build/pkgs/ratpoints/patches/>
               (search-patches "ratpoints-sturm_and_rp_private.patch"))))
    (build-system gnu-build-system)
    (arguments
     `(#:test-target "test"
       #:make-flags
       (list (string-append "INSTALL_DIR=" (assoc-ref %outputs "out"))
             "CCFLAGS=-fPIC")
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)            ;no configure script
         (add-before 'install 'create-install-directories
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out")))
               (mkdir-p out)
               (with-directory-excursion out
                 (for-each (lambda (d) (mkdir-p d))
                           '("bin" "include" "lib"))))
             #t)))))
    (inputs
     (list gmp))
    (home-page "http://www.mathe2.uni-bayreuth.de/stoll/programs/")
    (synopsis "Find rational points on hyperelliptic curves")
    (description "Ratpoints tries to find all rational points within
a given height bound on a hyperelliptic curve in a very efficient way,
by using an optimized quadratic sieve algorithm.")
    (license license:gpl2+)))

(define-public python-memory-allocator
  (package
    (name "python-memory-allocator")
    (version "0.1.3")
    (source (origin
              (method url-fetch)
              (uri (pypi-uri "memory_allocator" version))
              (sha256
               (base32
                "0qiijpv8zr7c5rjy64i4q3rb8qhn6v4yms5mza4p86y0w4m5r00k"))))
    (build-system python-build-system)
    (propagated-inputs (list python-cython))
    (home-page "https://github.com/sagemath/memory_allocator")
    (synopsis "An extension class to allocate memory easily with cython")
    (description "An extension class to allocate memory easily with cython")
    (license license:gpl3)))

(define-public python-pplpy
  (package
    (name "python-pplpy")
    (version "0.8.7")
    (source (origin
              (method url-fetch)
              (uri (pypi-uri "pplpy" version))
              (sha256
               (base32
                "1gfq5czkqxl395k06s77zij3xv7maiwagjvzmrpraxhsmvsd02sh"))))
    (build-system python-build-system)
    (inputs (list gmp
                  mpc
                  mpfr
                  pari-gp
                  ppl
                  python-cysignals
                  python-gmpy2))
    (native-inputs (list python-cython))
    (home-page "https://gitlab.com/videlec/pplpy")
    (synopsis "Python PPL wrapper")
    (description
     "This Python module pplpy provides a wrapper to the C++ Parma Polyhedra
Library (PPL).")
    (license license:gpl3)))

(define-public primecount
  (package
    (name "primecount")
    (version "7.4")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/kimwalisch/primecount/")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1dnkkmszc2knrrqmfbwf96ajxd7rpmaw0b8dx6z5r0f9w1wx7ak4"))))
    (build-system cmake-build-system)
    (arguments '(#:configure-flags (list "-DBUILD_SHARED_LIBS=ON" "-DBUILD_TESTS=ON")))
    (home-page "https://github.com/kimwalisch/primecount/")
    (synopsis "Fast prime counting function implementations")
    (description "primecount is a command-line program and C/C++ library that counts the number
of primes ≤ x (maximum 10^31) using highly optimized implementations of the
combinatorial prime counting algorithms.")
    (license license:bsd-2)))

(define-public python-primecountpy
  (package
    (name "python-primecountpy")
    (version "0.1.0")
    (source (origin
              (method url-fetch)
              (uri (pypi-uri "primecountpy" version))
              (sha256
               (base32
                "0xh6zx5zw5scy7jygqirks9y6z4zyfm0zjfp8nd6dw0m471przkq"))))
    (build-system python-build-system)
    (arguments (list #:phases #~(modify-phases %standard-phases
                                  (add-before 'build 'set-cflags
                                    (lambda _
                                      (setenv "CFLAGS" "-fopenmp")
                                      (setenv "CXXFLAGS" "-fopenmp"))))))
    (inputs (list pari-gp primecount))
    (propagated-inputs (list python-cysignals python-cython))
    (home-page "https://github.com/dimpase/primecountpy")
    (synopsis "Cython interface for C++ primecount library")
    (description "Cython interface for C++ primecount library")
    (license license:gpl3)))

(define-public python-lrcalc
  (package
    (name "python-lrcalc")
    (version "2.1")
    (source (origin
              (method url-fetch)
              (uri (pypi-uri "lrcalc" version))
              (sha256
               (base32
                "1adassfjalsdsngy01c37835qsx3gj0jx9cinc9b91x4xnd51873"))))
    (build-system python-build-system)
    (inputs (list lrcalc))
    (native-inputs (list python-cython))
    (home-page "https://math.rutgers.edu/~asbuch/lrcalc")
    (synopsis "Littlewood-Richardson Calculator bindings")
    (description "Littlewood-Richardson Calculator bindings")
    (license license:gpl3+)))

(define-public palp
  (package
    (name "palp")
    (version "2.20")
    (source (origin
              (method url-fetch)
              (uri (string-append "http://hep.itp.tuwien.ac.at/~kreuzer/CY/palp/palp-" version ".tar.gz"))
              (sha256
               (base32
                "1q1cl3vpdir16szy0jcadysydcrjp48hqxyx42kr8g9digkqjgkj"))))
    (build-system gnu-build-system)
    (arguments
     (list #:make-flags #~(list (string-append "CC=" #$(cc-for-target)))
           #:tests? #f                  ; no tests
           #:phases #~(modify-phases %standard-phases
                        (delete 'configure)
                        (replace 'install
                          (lambda _
                            (for-each
                             (lambda (name)
                               (install-file name (string-append #$output "/bin")))
                             '("class.x" "cws.x" "mori.x" "nef.x" "poly.x")))))))
    (home-page "http://hep.itp.tuwien.ac.at/~kreuzer/CY/CYpalp.html")
    (synopsis "Package for Analyzing Lattice Polytopes")
    (description synopsis)
    (license license:gpl3)))

(define-public gfan
  (package
    (name "gfan")
    (version "0.6.2")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://users-math.au.dk/jensen/software/gfan/gfan" version ".tar.gz"))
              (sha256
               (base32
                "02pihqb1lb76a0xbfwjzs1cd6ay3ldfxsm8dvsbl6qs3vkjxax56"))))
    (build-system gnu-build-system)
    (arguments
     (list #:make-flags #~(list (string-append "PREFIX=" #$output)
                                (string-append "CC=" #$(cc-for-target))
                                (string-append "CXX=" #$(cxx-for-target)))
           #:phases #~(modify-phases %standard-phases
                        (delete 'configure)
                        (add-before 'build 'fix-cddlib-include
                          (lambda _
                            (substitute* '("src/lp_cdd.cpp" "src/gfanlib_zcone.cpp" "src/app_librarytest.cpp")
                              (("^#include \"cdd/") "#include \"cddlib/")))))))
    (inputs (list cddlib gmp))
    (home-page "https://users-math.au.dk/jensen/software/gfan/gfan.html")
    (synopsis "Software package for computing Gröbner fans and tropical varieties")
    (description synopsis)
    (license license:gpl2+)))

(define-public flintqs
  (package
    (name "flintqs")
    (version "1.0")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/sagemath/FlintQS")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1f0lnayz6j6qgasx8pbq61d2fqam0wwhsmh6h15l4vq58l1vvbwj"))))
    (build-system gnu-build-system)
    (arguments
     (list #:phases #~(modify-phases %standard-phases
                        (add-after 'unpack 'create-changelog
                          (lambda _
                            (with-output-to-file "ChangeLog"
                              (lambda () (display ""))))))))
    (inputs (list gmp))
    (native-inputs (list autoconf automake))
    (home-page "https://github.com/sagemath/FlintQS")
    (synopsis "Highly optimized multi-polynomial quadratic sieve for integer
factorization")
    (description synopsis)
    (license license:gpl2)))

(define-public tachyon
  (package
    (name "tachyon")
    (version "0.99.5")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://jedi.ks.uiuc.edu/~johns/raytracer/files/" version
                    "/tachyon-" version ".tar.gz"))
              (sha256
               (base32
                "1xd6h5d4v6dsnm6w46bdcr15fwkcz44p8dncymfry50i4c83q809"))
              (patches (search-patches "tachyon-make-arch.patch"))))
    (build-system gnu-build-system)
    (arguments
     (list #:tests? #f ; no tests
           #:make-flags #~(list "linux-thr"
                                (string-append "CC=" #$(cc-for-target))
                                (string-append "AR=" #$(ar-for-target)))
           #:phases #~(modify-phases %standard-phases
                        (delete 'configure)
                        (add-after 'unpack 'cd-to-src
                          (lambda _
                            (chdir "unix")))
                        (add-before 'build 'enable-png-jpeg-support
                          (lambda* (#:key inputs #:allow-other-keys)
                            (substitute* "Make-config"
                              (("USEJPEG=") "USEJPEG = -DUSEJPEG")
                              (("JPEGLIB=") "JPEGLIB = -ljpeg")
                              (("USEPNG=") "USEPNG = -DUSEPNG")
                              (("PNGLIB=") "PNGLIB = -lpng -lz"))))
                        (add-before 'build 'fix-paths
                          (lambda* (#:key inputs #:allow-other-keys)
                            (substitute* "Make-config"
                              (("SHELL=/bin/sh")
                               (string-append "SHELL=" (search-input-file inputs "/bin/sh"))))))
                        (replace 'install
                          (lambda _
                            (install-file "../compile/tachyon"
                                          (string-append #$output "/bin"))
                            (install-file "../compile/libtachyon.a"
                                          (string-append #$output "/lib")))))))
    (inputs (list libjpeg-turbo libpng))
    (home-page "http://jedi.ks.uiuc.edu/~johns/raytracer/")
    (synopsis "Multithreaded ray tracing software")
    (description synopsis)
    (license license:bsd-3)))

(define-public sagemath-data-conway-polynomials
  (let
      ((install-py-origin
        (origin
          (method url-fetch)
          (uri
           "https://raw.githubusercontent.com/sagemath/sage/9.6/build/pkgs/conway_polynomials/spkg-install.py")
          (sha256 (base32
                   "1bwnqasnyv793hxg29viing4dnliz29grkhldsirq19d509yk1fs")))))
    (package
      (name "sagemath-data-conway-polynomials")
      (version "0.5")
      (source (origin
                (method url-fetch)
                (uri (string-append
                      "https://mirrors.mit.edu/sage/spkg/upstream/conway_polynomials/conway_polynomials-"
                      version ".tar.bz2"))
                (sha256
                 (base32
                  "05zb1ly9x2bbscqv0jgc45g48xx77mfs7qdbqhn4ihmihn57iwnq"))))
      (build-system trivial-build-system)
      (arguments
       (list #:modules '((guix build utils))
             #:builder #~(begin
                           (use-modules (guix build utils))

                           (setenv "PATH"
                                   (string-append #+(file-append bzip2 "/bin")
                                                  ":"
                                                  #+(file-append tar "/bin")
                                                  ":"
                                                  #+(file-append python "/bin")))
                           (setenv "SAGE_SHARE" (string-append #$output "/share"))
                           (setenv "PYTHONPATH" (getcwd))

                           (invoke "tar" "-xvf" #$source)
                           (symlink (string-append "conway_polynomials-" #$version) "src")
                           (invoke "python3" (assoc-ref %build-inputs "install-py")))))
      (inputs `(("install-py" ,install-py-origin)))
      (home-page
       "https://www.math.rwth-aachen.de/~Frank.Luebeck/data/ConwayPol/index.html")
      (synopsis "Tables of Conway polynomials over finite fields")
      (description synopsis)
      ;; no idea, Arch claims gpl, debian gpl2+??
      (license #f))))

(define-public sagemath-data-elliptic-curves
  (let
      ((install-py-origin
        (origin
          (method url-fetch)
          (uri
           "https://raw.githubusercontent.com/sagemath/sage/9.6/build/pkgs/elliptic_curves/spkg-install.py")
          (sha256 (base32
                   "116g684i6mvs11fvb6fzfsr4fn903axn31vigdyb8bgpf8l4hvc5")))))
    (package
      (name "sagemath-data-elliptic-curves")
      (version "0.8.1")
      (source (origin
                (method url-fetch)
                (uri (string-append
                      "https://mirrors.mit.edu/sage/spkg/upstream/elliptic_curves/elliptic_curves-"
                      version ".tar.bz2"))
                (sha256
                 (base32
                  "0l7xh4abw5sb4d37r0ylr3vwb88fpx2zrvfm5ql0c7yrv5q59fjz"))))
      (build-system trivial-build-system)
      (arguments
       (list #:modules '((guix build utils))
             #:builder #~(begin
                           (use-modules (guix build utils))

                           (setenv "PATH"
                                   (string-append #+(file-append bzip2 "/bin")
                                                  ":"
                                                  #+(file-append tar "/bin") ":"
                                                  #+(file-append python "/bin")))
                           (setenv "SAGE_SHARE" (string-append #$output "/share"))
                           (setenv "PYTHONPATH" (getcwd))

                           (invoke "tar" "-xvf" #$source)
                           (symlink (string-append "elliptic_curves-" #$version) "src")
                           (invoke "python3" (assoc-ref %build-inputs "install-py")))))
      (inputs `(("install-py" ,install-py-origin)))
      (home-page "https://johncremona.github.io/ecdata/")
      (synopsis "Databases of elliptic curves")
      (description synopsis)
      ;; no idea, Arch claims gpl, alledgedly is part of
      ;; https://github.com/JohnCremona/ecdata Artistic 2.0
      (license #f))))