;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015, 2016, 2017, 2018 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2016, 2017 Marius Bakke <mbakke@fastmail.com>
;;; Copyright © 2016 Hartmut Goebel <h.goebel@crazy-compilers.com>
;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2018 Kei Kebreau <kkebreau@posteo.net>
;;; Copyright © 2018 Mark Meyer <mark@ofosos.org>
;;; Copyright © 2018 Ben Woodcroft <donttrustben@gmail.com>
;;; Copyright © 2018 Fis Trivial <ybbs.daans@hotmail.com>
;;; Copyright © 2018 Julien Lepiller <julien@lepiller.eu>
;;; Copyright © 2018 Björn Höfling <bjoern.hoefling@bjoernhoefling.de>
;;;
;;; 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 machine-learning)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix utils)
  #:use-module (guix download)
  #:use-module (guix svn-download)
  #:use-module (guix build-system cmake)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system ocaml)
  #:use-module (guix build-system python)
  #:use-module (guix build-system r)
  #:use-module (guix git-download)
  #:use-module (gnu packages)
  #:use-module (gnu packages adns)
  #:use-module (gnu packages algebra)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages boost)
  #:use-module (gnu packages check)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages cran)
  #:use-module (gnu packages databases)
  #:use-module (gnu packages dejagnu)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages image)
  #:use-module (gnu packages maths)
  #:use-module (gnu packages mpi)
  #:use-module (gnu packages ocaml)
  #:use-module (gnu packages onc-rpc)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages protobuf)
  #:use-module (gnu packages python)
  #:use-module (gnu packages statistics)
  #:use-module (gnu packages swig)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages xml)
  #:use-module (gnu packages xorg)
  #:use-module (ice-9 match))

(define-public fann
  ;; The last release is >100 commits behind, so we package from git.
  (let ((commit "d71d54788bee56ba4cf7522801270152da5209d7"))
    (package
      (name "fann")
      (version (string-append "2.2.0-1." (string-take commit 8)))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url "https://github.com/libfann/fann.git")
                      (commit commit)))
                (file-name (string-append name "-" version "-checkout"))
                (sha256
                 (base32
                  "0ibwpfrjs6q2lijs8slxjgzb2llcl6rk3v2ski4r6215g5jjhg3x"))))
      (build-system cmake-build-system)
      (arguments
       `(#:phases
         (modify-phases %standard-phases
           (replace 'check
             (lambda* (#:key outputs #:allow-other-keys)
               (let* ((out (assoc-ref outputs "out")))
                 (with-directory-excursion (string-append (getcwd) "/tests")
                   (invoke "./fann_tests"))))))))
      (home-page "http://leenissen.dk/fann/wp/")
      (synopsis "Fast Artificial Neural Network")
      (description
       "FANN is a free open source neural network library, which implements
multilayer artificial neural networks in C with support for both fully
connected and sparsely connected networks.")
      (license license:lgpl2.1))))

(define-public libsvm
  (package
    (name "libsvm")
    (version "3.22")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://www.csie.ntu.edu.tw/~cjlin/libsvm/"
                           name "-" version ".tar.gz"))
       (sha256
        (base32
         "0zd7s19y5vb7agczl6456bn45cj1y64739sslaskw1qk7dywd0bd"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ;no "check" target
       #:phases (modify-phases %standard-phases
                  (delete 'configure)
                  (replace
                   'install             ; no ‘install’ target
                   (lambda* (#:key outputs #:allow-other-keys)
                     (let* ((out (assoc-ref outputs "out"))
                            (bin (string-append out "/bin/")))
                       (mkdir-p bin)
                       (for-each (lambda (file)
                                   (copy-file file (string-append bin file)))
                                 '("svm-train"
                                   "svm-predict"
                                   "svm-scale")))
                     #t)))))
    (home-page "http://www.csie.ntu.edu.tw/~cjlin/libsvm/")
    (synopsis "Library for Support Vector Machines")
    (description
     "LIBSVM is a machine learning library for support vector
classification, (C-SVC, nu-SVC), regression (epsilon-SVR, nu-SVR) and
distribution estimation (one-class SVM).  It supports multi-class
classification.")
    (license license:bsd-3)))

(define-public python-libsvm
  (package (inherit libsvm)
    (name "python-libsvm")
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ;no "check" target
       #:make-flags '("-C" "python")
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)
         (replace
          'install                      ; no ‘install’ target
          (lambda* (#:key inputs outputs #:allow-other-keys)
            (let ((site (string-append (assoc-ref outputs "out")
                                       "/lib/python"
                                       (string-take
                                        (string-take-right
                                         (assoc-ref inputs "python") 5) 3)
                                       "/site-packages/")))
              (substitute* "python/svm.py"
                (("../libsvm.so.2") "libsvm.so.2"))
              (mkdir-p site)
              (for-each (lambda (file)
                          (copy-file file (string-append site (basename file))))
                        (find-files "python" "\\.py"))
              (copy-file "libsvm.so.2"
                         (string-append site "libsvm.so.2")))
            #t)))))
    (inputs
     `(("python" ,python)))
    (synopsis "Python bindings of libSVM")))

(define-public ghmm
  ;; The latest release candidate is several years and a couple of fixes have
  ;; been published since.  This is why we download the sources from the SVN
  ;; repository.
  (let ((svn-revision 2341))
    (package
      (name "ghmm")
      (version (string-append "0.9-rc3-0." (number->string svn-revision)))
      (source (origin
                (method svn-fetch)
                (uri (svn-reference
                      (url "http://svn.code.sf.net/p/ghmm/code/trunk")
                      (revision svn-revision)))
                (file-name (string-append name "-" version))
                (sha256
                 (base32
                  "0qbq1rqp94l530f043qzp8aw5lj7dng9wq0miffd7spd1ff638wq"))))
      (build-system gnu-build-system)
      (arguments
       `(#:imported-modules (,@%gnu-build-system-modules
                             (guix build python-build-system))
         #:phases
         (modify-phases %standard-phases
           (add-after 'unpack 'enter-dir
             (lambda _ (chdir "ghmm") #t))
           (delete 'check)
           (add-after 'install 'check
             (assoc-ref %standard-phases 'check))
           (add-before 'check 'fix-PYTHONPATH
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (let ((python-version ((@@ (guix build python-build-system)
                                           get-python-version)
                                      (assoc-ref inputs "python"))))
                 (setenv "PYTHONPATH"
                         (string-append (getenv "PYTHONPATH")
                                        ":" (assoc-ref outputs "out")
                                        "/lib/python" python-version
                                        "/site-packages")))
               #t))
           (add-after 'enter-dir 'fix-runpath
             (lambda* (#:key outputs #:allow-other-keys)
               (substitute* "ghmmwrapper/setup.py"
                 (("^(.*)extra_compile_args = \\[" line indent)
                  (string-append indent
                                 "extra_link_args = [\"-Wl,-rpath="
                                 (assoc-ref outputs "out") "/lib\"],\n"
                                 line
                                 "\"-Wl,-rpath="
                                 (assoc-ref outputs "out")
                                 "/lib\", ")))
               #t))
           (add-after 'enter-dir 'disable-broken-tests
             (lambda _
               (substitute* "tests/Makefile.am"
                 ;; GHMM_SILENT_TESTS is assumed to be a command.
                 (("TESTS_ENVIRONMENT.*") "")
                 ;; Do not build broken tests.
                 (("chmm .*") "")
                 (("read_fa .*") "")
                 (("mcmc .*") "")
                 (("label_higher_order_test.*$")
                  "label_higher_order_test\n"))

               ;; These Python unittests are broken as there is no gato.
               ;; See https://sourceforge.net/p/ghmm/support-requests/3/
               (substitute* "ghmmwrapper/ghmmunittests.py"
                 (("^(.*)def (testNewXML|testMultipleTransitionClasses|testNewXML)"
                   line indent)
                  (string-append indent
                                 "@unittest.skip(\"Disabled by Guix\")\n"
                                 line)))
               #t))
           (add-after 'disable-broken-tests 'autogen
             (lambda _
               (invoke "bash" "autogen.sh"))))))
      (inputs
       `(("python" ,python-2) ; only Python 2 is supported
         ("libxml2" ,libxml2)))
      (native-inputs
       `(("pkg-config" ,pkg-config)
         ("dejagnu" ,dejagnu)
         ("swig" ,swig)
         ("autoconf" ,autoconf)
         ("automake" ,automake)
         ("libtool" ,libtool)))
      (home-page "http://ghmm.org")
      (synopsis "Hidden Markov Model library")
      (description
       "The General Hidden Markov Model library (GHMM) is a C library with
additional Python bindings implementing a wide range of types of @dfn{Hidden
Markov Models} (HMM) and algorithms: discrete, continuous emissions, basic
training, HMM clustering, HMM mixtures.")
      (license license:lgpl2.0+))))

(define-public mcl
  (package
    (name "mcl")
    (version "14.137")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://micans.org/mcl/src/mcl-"
                    (string-replace-substring version "." "-")
                    ".tar.gz"))
              (sha256
               (base32
                "15xlax3z31lsn62vlg94hkm75nm40q4679amnfg13jm8m2bnhy5m"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags (list "--enable-blast")))
    (inputs
     `(("perl" ,perl)))
    (home-page "http://micans.org/mcl/")
    (synopsis "Clustering algorithm for graphs")
    (description
     "The MCL algorithm is short for the @dfn{Markov Cluster Algorithm}, a
fast and scalable unsupervised cluster algorithm for graphs (also known as
networks) based on simulation of (stochastic) flow in graphs.")
    ;; In the LICENCE file and web page it says "The software is licensed
    ;; under the GNU General Public License, version 3.", but in several of
    ;; the source code files it suggests GPL3 or later.
    ;; http://listserver.ebi.ac.uk/pipermail/mcl-users/2016/000376.html
    (license license:gpl3)))

(define-public ocaml-mcl
  (package
    (name "ocaml-mcl")
    (version "12-068oasis4")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "https://github.com/fhcrc/mcl/archive/"
             version ".tar.gz"))
       (file-name (string-append name "-" version ".tar.gz"))
       (sha256
        (base32
         "1l5jbhwjpsj38x8b9698hfpkv75h8hn3kj0gihjhn8ym2cwwv110"))))
    (build-system ocaml-build-system)
    (arguments
     `(#:ocaml ,ocaml-4.02
       #:findlib ,ocaml4.02-findlib
       #:phases
       (modify-phases %standard-phases
         (add-before 'configure 'patch-paths
           (lambda _
             (substitute* "configure"
               (("SHELL = /bin/sh") (string-append "SHELL = "(which "sh"))))
             (substitute* "setup.ml"
               (("LDFLAGS=-fPIC")
                (string-append "LDFLAGS=-fPIC\"; \"SHELL=" (which "sh"))))
             #t)))))
    (home-page "https://github.com/fhcrc/mcl")
    (synopsis "OCaml wrappers around MCL")
    (description
     "This package provides OCaml bindings for the MCL graph clustering
algorithm.")
    (license license:gpl3)))

(define-public ocaml4.01-mcl
  (package-with-ocaml4.01 ocaml-mcl))

(define-public randomjungle
  (package
    (name "randomjungle")
    (version "2.1.0")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "https://www.imbs.uni-luebeck.de/fileadmin/files/Software"
             "/randomjungle/randomjungle-" version ".tar_.gz"))
       (patches (search-patches "randomjungle-disable-static-build.patch"))
       (sha256
        (base32
         "12c8rf30cla71swx2mf4ww9mfd8jbdw5lnxd7dxhyw1ygrvg6y4w"))))
    (build-system gnu-build-system)
    (arguments
     `(#:configure-flags
       (list "--disable-static"
             (string-append "--with-boost="
                            (assoc-ref %build-inputs "boost")))
       #:phases
       (modify-phases %standard-phases
         (add-before
          'configure 'set-CXXFLAGS
          (lambda _
            (setenv "CXXFLAGS" "-fpermissive ")
            #t)))))
    (inputs
     `(("boost" ,boost)
       ("gsl" ,gsl)
       ("libxml2" ,libxml2)
       ("zlib" ,zlib)))
    (native-inputs
     `(("gfortran" ,gfortran)
       ("gfortran:lib" ,gfortran "lib")))
    ;; Non-portable assembly instructions are used so building fails on
    ;; platforms other than x86_64 or i686.
    (supported-systems '("x86_64-linux" "i686-linux"))
    (home-page "https://www.imbs.uni-luebeck.de/forschung/software/details.html#c224")
    (synopsis "Implementation of the Random Forests machine learning method")
    (description
     "Random Jungle is an implementation of Random Forests.  It is supposed to
analyse high dimensional data.  In genetics, it can be used for analysing big
Genome Wide Association (GWA) data.  Random Forests is a powerful machine
learning method.  Most interesting features are variable selection, missing
value imputation, classifier creation, generalization error estimation and
sample proximities between pairs of cases.")
    (license license:gpl3+)))

(define-public shogun
  (package
    (name "shogun")
    (version "6.1.3")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "ftp://shogun-toolbox.org/shogun/releases/"
             (version-major+minor version)
             "/sources/shogun-" version ".tar.bz2"))
       (sha256
        (base32
         "1rn9skm3nw6hr7mr3lgp2gfqhi7ii0lyxck7qmqnf8avq349s5jp"))
       (modules '((guix build utils)
                  (ice-9 rdelim)))
       (snippet
        '(begin
           ;; Remove non-free sources and files referencing them
           (for-each delete-file
                     (find-files "src/shogun/classifier/svm/"
                                 "SVMLight\\.(cpp|h)"))
           (for-each delete-file
                     (find-files "examples/undocumented/libshogun/"
                                 (string-append
                                  "(classifier_.*svmlight.*|"
                                  "evaluation_cross_validation_locked_comparison).cpp")))
           ;; Remove non-free functions.
           (define (delete-ifdefs file)
             (with-atomic-file-replacement file
               (lambda (in out)
                 (let loop ((line (read-line in 'concat))
                            (skipping? #f))
                   (if (eof-object? line)
                       #t
                       (let ((skip-next?
                              (or (and skipping?
                                       (not (string-prefix?
                                             "#endif //USE_SVMLIGHT" line)))
                                  (string-prefix?
                                   "#ifdef USE_SVMLIGHT" line))))
                         (when (or (not skipping?)
                                   (and skipping? (not skip-next?)))
                           (display line out))
                         (loop (read-line in 'concat) skip-next?)))))))
           (for-each delete-ifdefs
                     (append
                      (find-files "src/shogun/classifier/mkl"
                                  "^MKLClassification\\.cpp")
                      (find-files "src/shogun/classifier/svm"
                                  "^SVMLightOneClass\\.(cpp|h)")
                      (find-files "src/shogun/multiclass"
                                  "^ScatterSVM\\.(cpp|h)")
                      (find-files "src/shogun/kernel/"
                                  "^(Kernel|CombinedKernel|ProductKernel)\\.(cpp|h)")
                      (find-files "src/shogun/regression/svr"
                                  "^(MKLRegression|SVRLight)\\.(cpp|h)")
                      (find-files "src/shogun/transfer/domain_adaptation"
                                  "^DomainAdaptationSVM\\.(cpp|h)")))
           #t))))
    (build-system cmake-build-system)
    (arguments
     '(#:tests? #f ;no check target
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'delete-broken-symlinks
           (lambda _
             (for-each delete-file '("applications/arts/data"
                                     "applications/asp/data"
                                     "applications/easysvm/data"
                                     "applications/msplicer/data"
                                     "applications/ocr/data"
                                     "examples/meta/data"
                                     "examples/undocumented/data"))
             #t))
         (add-after 'unpack 'change-R-target-path
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* '("src/interfaces/r/CMakeLists.txt"
                            "examples/meta/r/CMakeLists.txt")
               (("\\$\\{R_COMPONENT_LIB_PATH\\}")
                (string-append (assoc-ref outputs "out")
                               "/lib/R/library/")))
             #t))
         (add-after 'unpack 'fix-octave-modules
           (lambda* (#:key outputs #:allow-other-keys)
             (substitute* "src/interfaces/octave/CMakeLists.txt"
               (("^include_directories\\(\\$\\{OCTAVE_INCLUDE_DIRS\\}")
                "include_directories(${OCTAVE_INCLUDE_DIRS} ${OCTAVE_INCLUDE_DIRS}/octave")
               ;; change target directory
               (("\\$\\{OCTAVE_OCT_LOCAL_API_FILE_DIR\\}")
                (string-append (assoc-ref outputs "out")
                               "/share/octave/packages")))
             (substitute* '("src/interfaces/octave/swig_typemaps.i"
                            "src/interfaces/octave/sg_print_functions.cpp")
               ;; "octave/config.h" and "octave/oct-obj.h" deprecated in Octave.
               (("octave/config\\.h") "octave/octave-config.h")
               (("octave/oct-obj.h") "octave/ovl.h"))
             #t))
         (add-after 'unpack 'move-rxcpp
           (lambda* (#:key inputs #:allow-other-keys)
             (let ((rxcpp-dir "shogun/third-party/rxcpp"))
               (mkdir-p rxcpp-dir)
               (install-file (assoc-ref inputs "rxcpp") rxcpp-dir)
               #t)))
         (add-before 'build 'set-HOME
           ;; $HOME needs to be set at some point during the build phase
           (lambda _ (setenv "HOME" "/tmp") #t)))
       #:configure-flags
       (list "-DCMAKE_BUILD_WITH_INSTALL_RPATH=TRUE"
             "-DUSE_SVMLIGHT=OFF" ;disable proprietary SVMLIGHT
             "-DBUILD_META_EXAMPLES=OFF" ;requires unpackaged ctags
             ;;"-DINTERFACE_JAVA=ON" ;requires unpackaged jblas
             ;;"-DINTERFACE_RUBY=ON" ;requires unpackaged ruby-narray
             ;;"-DINTERFACE_PERL=ON" ;"FindPerlLibs" does not exist
             ;;"-DINTERFACE_LUA=ON"  ;fails because lua doesn't build pkgconfig file
             "-DINTERFACE_OCTAVE=ON"
             "-DINTERFACE_PYTHON=ON"
             "-DINTERFACE_R=ON")))
    (inputs
     `(("python" ,python)
       ("numpy" ,python-numpy)
       ("r-minimal" ,r-minimal)
       ("octave" ,octave-cli)
       ("swig" ,swig)
       ("eigen" ,eigen)
       ("hdf5" ,hdf5)
       ("atlas" ,atlas)
       ("arpack" ,arpack-ng)
       ("lapack" ,lapack)
       ("glpk" ,glpk)
       ("libxml2" ,libxml2)
       ("lzo" ,lzo)
       ("zlib" ,zlib)))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("rxcpp" ,rxcpp)))
    ;; Non-portable SSE instructions are used so building fails on platforms
    ;; other than x86_64.
    (supported-systems '("x86_64-linux"))
    (home-page "http://shogun-toolbox.org/")
    (synopsis "Machine learning toolbox")
    (description
     "The Shogun Machine learning toolbox provides a wide range of unified and
efficient Machine Learning (ML) methods.  The toolbox seamlessly allows to
combine multiple data representations, algorithm classes, and general purpose
tools.  This enables both rapid prototyping of data pipelines and extensibility
in terms of new algorithms.")
    (license license:gpl3+)))

(define-public rxcpp
  (package
    (name "rxcpp")
    (version "4.0.0")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://github.com/ReactiveX/RxCpp/archive/v"
                           version ".tar.gz"))
       (sha256
        (base32
         "0y2isr8dy2n1yjr9c5570kpc9lvdlch6jv0jvw000amwn5d3krsh"))
       (file-name (string-append name "-" version ".tar.gz"))))
    (build-system cmake-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'remove-werror
           (lambda _
             (substitute* (find-files ".")
               (("-Werror") ""))
             #t))
         (replace 'check
           (lambda _
             (invoke "ctest"))))))
    (native-inputs
     `(("catch" ,catch-framework)))
    (home-page "http://reactivex.io/")
    (synopsis "Reactive Extensions for C++")
    (description
     "The Reactive Extensions for C++ (RxCpp) is a library of algorithms for
values-distributed-in-time.  ReactiveX is a library for composing asynchronous
and event-based programs by using observable sequences.

It extends the observer pattern to support sequences of data and/or events and
adds operators that allow you to compose sequences together declaratively while
abstracting away concerns about things like low-level threading,
synchronization, thread-safety, concurrent data structures, and non-blocking
I/O.")
    (license license:asl2.0)))

(define-public r-adaptivesparsity
  (package
    (name "r-adaptivesparsity")
    (version "1.6")
    (source (origin
              (method url-fetch)
              (uri (cran-uri "AdaptiveSparsity" version))
              (sha256
               (base32
                "0imr5m8mll9j6n4icsv6z9rl5kbnwsp9wvzrg7n90nnmcxq2cz91"))))
    (properties
     `((upstream-name . "AdaptiveSparsity")))
    (build-system r-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'link-against-armadillo
           (lambda _
             (substitute* "src/Makevars"
               (("PKG_LIBS=" prefix)
                (string-append prefix "-larmadillo"))))))))
    (propagated-inputs
     `(("r-mass" ,r-mass)
       ("r-matrix" ,r-matrix)
       ("r-rcpp" ,r-rcpp)
       ("r-rcpparmadillo" ,r-rcpparmadillo)))
    (inputs
     `(("armadillo" ,armadillo)))
    (home-page "https://cran.r-project.org/web/packages/AdaptiveSparsity")
    (synopsis "Adaptive sparsity models")
    (description
     "This package implements the Figueiredo machine learning algorithm for
adaptive sparsity and the Wong algorithm for adaptively sparse gaussian
geometric models.")
    (license license:lgpl3+)))

(define-public r-kernlab
  (package
    (name "r-kernlab")
    (version "0.9-27")
    (source
     (origin
       (method url-fetch)
       (uri (cran-uri "kernlab" version))
       (sha256
        (base32
         "1m0xqf6gyvwayz7w3c83y32ayvnlz0jicj8ijk808zq9sh7dbbgn"))))
    (build-system r-build-system)
    (home-page "https://cran.r-project.org/web/packages/kernlab")
    (synopsis "Kernel-based machine learning tools")
    (description
     "This package provides kernel-based machine learning methods for
classification, regression, clustering, novelty detection, quantile regression
and dimensionality reduction.  Among other methods @code{kernlab} includes
Support Vector Machines, Spectral Clustering, Kernel PCA, Gaussian Processes
and a QP solver.")
    (license license:gpl2)))

(define-public gemmlowp-for-tensorflow
  ;; The commit hash is taken from "tensorflow/workspace.bzl".
  (let ((commit "38ebac7b059e84692f53e5938f97a9943c120d98")
        (revision "2"))
    (package
      (name "gemmlowp")
      (version (git-version "0" revision commit))
      (source (origin
                (method url-fetch)
                (uri (string-append "https://mirror.bazel.build/"
                                    "github.com/google/gemmlowp/archive/"
                                    commit ".zip"))
                (file-name (string-append "gemmlowp-" version ".zip"))
                (sha256
                 (base32
                  "0n56s2g8hrssm4w8qj1v58gfm56a04n9v992ixkmvk6zjiralzxq"))))
      (build-system cmake-build-system)
      (arguments
       `(#:configure-flags
         (list ,@(match (%current-system)
                   ((or "x86_64-linux" "i686-linux")
                    '("-DCMAKE_CXX_FLAGS=-msse4.1"))
                   (_ '())))
         #:phases
         (modify-phases %standard-phases
           ;; This directory contains the CMakeLists.txt.
           (add-after 'unpack 'chdir
             (lambda _ (chdir "contrib") #t))
           ;; There is no install target
           (replace 'install
             (lambda* (#:key outputs #:allow-other-keys)
               (let* ((out (assoc-ref outputs "out"))
                      (lib (string-append out "/lib/"))
                      (inc (string-append out "/include/")))
                 (install-file "../build/libeight_bit_int_gemm.so" lib)
                 (for-each (lambda (dir)
                             (let ((target (string-append inc "/" dir)))
                               (mkdir-p target)
                               (for-each (lambda (h)
                                           (install-file h target))
                                         (find-files (string-append "../" dir)
                                                     "\\.h$"))))
                           '("meta" "profiling" "public" "fixedpoint"
                             "eight_bit_int_gemm" "internal"))
                 #t))))))
      (native-inputs
       `(("unzip" ,unzip)))
      (home-page "https://github.com/google/gemmlowp")
      (synopsis "Small self-contained low-precision GEMM library")
      (description
       "This is a small self-contained low-precision @dfn{general matrix
multiplication} (GEMM) library.  It is not a full linear algebra library.
Low-precision means that the input and output matrix entries are integers on
at most 8 bits.  To avoid overflow, results are internally accumulated on more
than 8 bits, and at the end only some significant 8 bits are kept.")
      (license license:asl2.0))))

(define-public tensorflow-core
  (package
    (name "tensorflow-core")
    (version "1.7.0")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/tensorflow/tensorflow.git")
             (commit (string-append "v" version))))
       (file-name (string-append "tensorflow-" version "-checkout"))
       (sha256
        (base32
         "0jljzbwhmxi8crbivwachcmlfrrv279qrsvwc62cnnbyw0n1g0kp"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f ; no "check" target
       #:make-flags
       (list "-f" "tensorflow/contrib/makefile/Makefile"
             "CC=gcc")
       #:phases
       (modify-phases %standard-phases
         (delete 'configure)
         (add-after 'unpack 'fix-version
           (lambda _
             (substitute* "tensorflow/tools/git/gen_git_source.sh"
               (("^GIT_VERSION=.*")
                (string-append "GIT_VERSION=" ,version "\n")))
             #t))
         (add-after 'unpack 'unpack-third-party
           (lambda* (#:key inputs #:allow-other-keys)
             (with-directory-excursion "tensorflow/contrib/makefile/"
               (let ((fft2d "downloads/fft2d")
                     (nsync "downloads/nsync"))
                 (mkdir-p fft2d)
                 (invoke "tar" "xf" (assoc-ref inputs "fft2d")
                         "-C" fft2d "--strip-components=1")
                 (mkdir-p nsync)
                 (invoke "tar" "xf" (assoc-ref inputs "nsync")
                         "-C" nsync "--strip-components=1")))))
         ;; FIXME: it would be nice to build a separate package for nsync and
         ;; use it here.  Unfortunately, I could not build Tensorflow with a
         ;; separately built nsync.
         (add-before 'build 'build-nsync
           (lambda _
             (with-directory-excursion "tensorflow/contrib/makefile/"
               (invoke "bash" "compile_nsync.sh")
               (setenv "TARGET_NSYNC_LIB"
                       "tensorflow/contrib/makefile/downloads/nsync/builds/default.linux.c++11/nsync.a")
               (setenv "HOST_NSYNC_LIB"
                       "tensorflow/contrib/makefile/downloads/nsync/builds/default.linux.c++11/nsync.a")
               #t)))
         (add-after 'unpack 'find-eigen-headers
           (lambda* (#:key inputs #:allow-other-keys)
             ;; Ensure that Eigen headers can be found
             (setenv "CPLUS_INCLUDE_PATH"
                     (string-append (getenv "CPLUS_INCLUDE_PATH")
                                    ":"
                                    (assoc-ref inputs "eigen")
                                    "/include/eigen3"))
             #t))
         (replace 'install
           (lambda* (#:key outputs #:allow-other-keys)
             (let* ((out (assoc-ref outputs "out"))
                    (lib (string-append out "/lib"))
                    (inc (string-append out "/include")))
               (install-file "tensorflow/contrib/makefile/gen/lib/libtensorflow-core.a" lib)
               (for-each (lambda (file)
                           (let ((target (string-append inc "/"
                                                        (dirname file))))
                             (mkdir-p target)
                             (install-file file target)))
                         (find-files "tensorflow/core" ".*\\.h$"))
               #t))))))
    (native-inputs
     `(("protobuf" ,protobuf)           ; protoc
       ;; "You may use, copy, modify this code for any purpose and without
       ;; fee. You may distribute this ORIGINAL package."
       ("fft2d"
        ,(origin
           (method url-fetch)
           (uri "https://mirror.bazel.build/www.kurims.kyoto-u.ac.jp/~ooura/fft.tgz")
           (sha256
            (base32
             "15jjkfvhqvl2c0753d2di8hz0pyzn598g74wqy79awdrf1y67fsj"))))
       ("nsync"
        ,(origin
           (method url-fetch)
           (uri (string-append "https://mirror.bazel.build/"
                               "github.com/google/nsync/archive/"
                               "0559ce013feac8db639ee1bf776aca0325d28777.tar.gz"))
           (sha256
            (base32
             "0qdkyqym34x739mmzv97ah5r7ph462v5xkxqxvidmcfqbi64b132"))))
       ("googletest" ,googletest)))
    (inputs
     `(("eigen" ,eigen)
       ("gemmlowp" ,gemmlowp-for-tensorflow)
       ("protobuf" ,protobuf)
       ("zlib" ,zlib)))
    (home-page "https://tensorflow.org")
    (synopsis "Machine learning framework")
    (description
     "TensorFlow is a software library for high performance numerical
computation.  Its flexible architecture allows easy deployment of computation
across a variety of platforms, and from desktops to clusters of servers to
mobile and edge devices.

This package provides only the core library.")
    (license license:asl2.0)))

(define-public grpc
  (package
    (name "grpc")
    (version "1.16.1")
    (source (origin
              (method git-fetch)
              (uri (git-reference
                    (url "https://github.com/grpc/grpc.git")
                    (commit (string-append "v" version))))
              (file-name (git-file-name name version))
              (sha256
               (base32
                "1jimqz3115f9pli5w6ik9wi7mjc7ix6y7yrq4a1ab9fc3dalj7p2"))))
    (build-system cmake-build-system)
    (arguments
     `(#:tests? #f ; no test target
       #:configure-flags
       (list "-DgRPC_ZLIB_PROVIDER=package"
             "-DgRPC_CARES_PROVIDER=package"
             "-DgRPC_SSL_PROVIDER=package"
             "-DgRPC_PROTOBUF_PROVIDER=package")))
    (inputs
     `(("c-ares" ,c-ares-next)
       ("openssl" ,openssl)
       ("zlib" ,zlib)))
    (native-inputs
     `(("protobuf" ,protobuf-next)
       ("python" ,python-wrapper)))
    (home-page "https://grpc.io")
    (synopsis "High performance universal RPC framework")
    (description "gRPC is a modern open source high performance @dfn{Remote
Procedure Call} (RPC) framework that can run in any environment.  It can
efficiently connect services in and across data centers with pluggable support
for load balancing, tracing, health checking and authentication.  It is also
applicable in last mile of distributed computing to connect devices, mobile
applications and browsers to backend services.")
    (license license:asl2.0)))

(define-public python-grpcio
  (package
    (name "python-grpcio")
    (version "1.17.1")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri "grpcio" version))
       (sha256
        (base32
         "0qb9y6j83nxa6d4kc60i8yfgdm7a8ms7b54kncjzf5y7nsxp8rzx"))))
    (build-system python-build-system)
    (propagated-inputs
     `(("python-six" ,python-six)))
    (home-page "https://grpc.io")
    (synopsis "HTTP/2-based RPC framework")
    (description "This package provides a Python library for communicating
with the HTTP/2-based RPC framework gRPC.")
    (license license:asl2.0)))

(define-public tensorflow
  (package
    (name "tensorflow")
    (version "1.9.0")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/tensorflow/tensorflow.git")
             (commit (string-append "v" version))))
       (file-name (string-append "tensorflow-" version "-checkout"))
       (sha256
        (base32
         "0a9kwha395g3wgxfwln5j8vn9nkspmd75xldrlqdq540w996g8xa"))))
    (build-system cmake-build-system)
    (arguments
     `(#:tests? #f                      ; no "check" target
       #:build-type "Release"
       #:configure-flags
       (let ((protobuf (assoc-ref %build-inputs "protobuf"))
             (snappy (assoc-ref %build-inputs "snappy"))
             (sqlite (assoc-ref %build-inputs "sqlite")))
         (list ;; TODO: Use protobuf from Guix
          ;; (string-append "-Dprotobuf_STATIC_LIBRARIES="
          ;;                protobuf "/lib/libprotobuf.a")
          (string-append "-DPROTOBUF_PROTOC_EXECUTABLE="
                         protobuf "/bin/protoc")
          ;; TODO: Use snappy from Guix
          ;; (string-append "-Dsnappy_STATIC_LIBRARIES="
          ;;                snappy "/lib/libsnappy.a")
          ;; (string-append "-Dsnappy_HEADERS="
          ;;                snappy "/include/snappy.h")
          ;; TODO: this is ignored.  Should be a definition in code.
          ;;"-DTF_USE_SNAPPY"
          ;; Use sqlite from Guix
          (string-append "-Dsqlite_STATIC_LIBRARIES="
                         sqlite "/lib/libsqlite.a")
          (string-append "-Dsqlite_HEADERS="
                         sqlite "/include/sqlite3.h "
                         sqlite "/include/sqlite3ext.h")
          ;; Use system libraries wherever possible.  Currently, this
          ;; only affects zlib.
          "-Dsystemlib_ALL=ON"

          ;;"-DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=true"
          "-Dtensorflow_ENABLE_POSITION_INDEPENDENT_CODE=ON"
          "-Dtensorflow_BUILD_SHARED_LIB=ON"
          "-Dtensorflow_OPTIMIZE_FOR_NATIVE_ARCH=OFF"
          "-Dtensorflow_ENABLE_SSL_SUPPORT=OFF"
          "-Dtensorflow_BUILD_CONTRIB_KERNELS=OFF"))
       #:make-flags
       (list "CC=gcc")
       #:modules ((ice-9 ftw)
                  (guix build utils)
                  (guix build cmake-build-system))
       #:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'set-source-file-times-to-1980
           ;; At the end of the tf_python_build_pip_package target, a ZIP
           ;; archive should be generated via bdist_wheel, but it fails with
           ;; "ZIP does not support timestamps before 1980".  Luckily,
           ;; SOURCE_DATE_EPOCH is respected, which we set to some time in
           ;; 1980.
          (lambda _ (setenv "SOURCE_DATE_EPOCH" "315532800") #t))
         ;; See https://github.com/tensorflow/tensorflow/issues/20517#issuecomment-406373913
         (add-after 'unpack 'python3.7-compatibility
           (lambda _
             (substitute* '("tensorflow/python/eager/pywrap_tfe_src.cc"
                            "tensorflow/python/lib/core/ndarray_tensor.cc"
                            "tensorflow/python/lib/core/py_func.cc")
               (("PyUnicode_AsUTF8") "(char *)PyUnicode_AsUTF8"))
             (substitute* "tensorflow/c/eager/c_api.h"
               (("unsigned char async")
                "unsigned char is_async"))

             ;; Remove dependency on tensorboard, a complicated but probably
             ;; optional package.
             (substitute* "tensorflow/tools/pip_package/setup.py"
               ((".*'tensorboard >.*") ""))
             #t))
         (add-after 'python3.7-compatibility 'chdir
           (lambda _ (chdir "tensorflow/contrib/cmake") #t))
         (add-after 'chdir 'disable-downloads
           (lambda* (#:key inputs #:allow-other-keys)
             (substitute* (find-files "external" "\\.cmake$")
               (("GIT_REPOSITORY.*") "")
               (("GIT_TAG.*") "")
               (("PREFIX ")
                "DOWNLOAD_COMMAND \"\"\nPREFIX "))

             ;; Use packages from Guix
             (let ((grpc (assoc-ref inputs "grpc")))
               (substitute* "CMakeLists.txt"
                 ;; Sqlite
                 (("include\\(sqlite\\)") "")
                 (("\\$\\{sqlite_STATIC_LIBRARIES\\}")
                  (string-append (assoc-ref inputs "sqlite")
                                 "/lib/libsqlite3.so"))
                 (("sqlite_copy_headers_to_destination") "")

                 ;; PNG
                 (("include\\(png\\)") "")
                 (("\\$\\{png_STATIC_LIBRARIES\\}")
                  (string-append (assoc-ref inputs "libpng")
                                 "/lib/libpng16.so"))
                 (("png_copy_headers_to_destination") "")

                 ;; JPEG
                 (("include\\(jpeg\\)") "")
                 (("\\$\\{jpeg_STATIC_LIBRARIES\\}")
                  (string-append (assoc-ref inputs "libjpeg")
                                 "/lib/libjpeg.so"))
                 (("jpeg_copy_headers_to_destination") "")

                 ;; GIF
                 (("include\\(gif\\)") "")
                 (("\\$\\{gif_STATIC_LIBRARIES\\}")
                  (string-append (assoc-ref inputs "giflib")
                                 "/lib/libgif.so"))
                 (("gif_copy_headers_to_destination") "")

                 ;; lmdb
                 (("include\\(lmdb\\)") "")
                 (("\\$\\{lmdb_STATIC_LIBRARIES\\}")
                  (string-append (assoc-ref inputs "lmdb")
                                 "/lib/liblmdb.so"))
                 (("lmdb_copy_headers_to_destination") "")

                 ;; TODO: the "protobuf" project is depended on by other
                 ;; projects in the cmake files, so removing it is a little
                 ;; tricky.
                 ;;(("include\\(protobuf\\)") "")
                 ;; (("\\$\\{protobuf_STATIC_LIBRARIES\\}")
                 ;;  (string-append (assoc-ref inputs "protobuf:static")
                 ;;                 "/lib/libprotobuf.a"))
                 ;;(("protobuf_copy_headers_to_destination") "")
                 ;;(("^ +protobuf$") "")

                 ;; gRPC
                 ;; TODO: the gRPC sources are needed by protobuf
                 ;; (("include\\(grpc\\)") "")
                 ;; (("\\$\\{grpc_STATIC_LIBRARIES\\}")
                 ;;  (string-append grpc "/lib/libaddress_sorting.a "
                 ;;                 grpc "/lib/libgpr.a "
                 ;;                 grpc "/lib/libgrpc++.a "
                 ;;                 grpc "/lib/libgrpc.a "
                 ;;                 grpc "/lib/libgrpc++_cronet.a "
                 ;;                 grpc "/lib/libgrpc_cronet.a "
                 ;;                 grpc "/lib/libgrpc++_error_details.a "
                 ;;                 grpc "/lib/libgrpc_plugin_support.a "
                 ;;                 grpc "/lib/libgrpcpp_channelz.a "
                 ;;                 grpc "/lib/libgrpc++_reflection.a "
                 ;;                 grpc "/lib/libgrpc++_unsecure.a "
                 ;;                 grpc "/lib/libgrpc_unsecure.a "))
                 ;; (("list\\(APPEND tensorflow_EXTERNAL_DEPENDENCIES grpc\\)") "")
                 ))

             ;; ;; Remove dependency on bundled grpc
             ;; (substitute* "tf_core_distributed_runtime.cmake"
             ;;   (("tf_core_cpu grpc") "tf_core_cpu"))
             ;; (substitute* "tf_tools.cmake"
             ;;   (("add_dependencies\\(\\$\\{proto_text\\} grpc\\)") ""))

             (substitute* "external/grpc.cmake"
               (("\\$\\{CMAKE_CURRENT_BINARY_DIR\\}/grpc/src/grpc/third_party/cares/cares/lib/libcares.a")
                (string-append (assoc-ref inputs "c-ares")
                               "/lib/libcares.so")))
             #t))
         (add-after 'configure 'unpack-third-party
           (lambda* (#:key inputs #:allow-other-keys)
             ;; This is needed to configure bundled packages properly.
             (setenv "CONFIG_SHELL" (which "bash"))
             (for-each
              (lambda (name)
                (let* ((what  (assoc-ref inputs (string-append name "-src")))
                       (name* (string-map (lambda (c)
                                            (if (char=? c #\-)
                                                #\_ c)) name))
                       (where (string-append "../build/" name* "/src/" name*)))
                  (cond
                   ((string-suffix? ".zip" what)
                    (mkdir-p where)
                    (with-directory-excursion where
                      (invoke "unzip" what)))
                   ((string-suffix? ".tar.gz" what)
                    (mkdir-p where)
                    (invoke "tar" "xf" what
                            "-C" where "--strip-components=1"))
                   (else
                    ;; TODO: merge with "where"
                    (let ((parent (string-append "../build/" name* "/src/")))
                      (mkdir-p parent)
                      (with-directory-excursion parent
                        (when (file-exists? name*)
                          (delete-file-recursively name*))
                        (copy-recursively what name*)
                        (map make-file-writable
                             (find-files name* ".*"))))))))
              (list "boringssl"
                    "cub"
                    "double-conversion"
                    "eigen"
                    "farmhash"
                    "fft2d"
                    "grpc" ; TODO: the sources need to be available for protobuf magic
                    "highwayhash"
                    "jsoncpp"
                    "nsync"
                    "protobuf"
                    "re2"
                    "snappy"))

             (rename-file "../build/cub/src/cub/cub-1.8.0/"
                          "../build/cub/src/cub/cub/")

             ;; gRPC dependencies: use installed packages instead of bundled
             ;; sources.
             (substitute* "../build/grpc/src/grpc/CMakeLists.txt"
               (("set\\(gRPC_ZLIB_PROVIDER \"module\"")
                "set(gRPC_ZLIB_PROVIDER \"package\"")
               (("set\\(gRPC_CARES_PROVIDER \"module\"")
                "set(gRPC_CARES_PROVIDER \"package\"")
               (("set\\(gRPC_SSL_PROVIDER \"module\"")
                "set(gRPC_SSL_PROVIDER \"package\"")
               (("set\\(gRPC_PROTOBUF_PROVIDER \"module\"")
                "set(gRPC_PROTOBUF_PROVIDER \"package\""))
             #t))
         (add-after 'unpack 'fix-python-build
           (lambda* (#:key outputs #:allow-other-keys)
             ;; Ensure that all Python dependencies can be found at build time.
             (substitute* "tensorflow/contrib/cmake/tf_python.cmake"
               (("PYTHONPATH=\\$\\{CMAKE_CURRENT_BINARY_DIR\\}/tf_python" m)
                (string-append m ":" (getenv "PYTHONPATH"))))

             ;; Correct the RUNPATH of ops libraries generated for Python.
             ;; TODO: this doesn't work :(
             ;; /gnu/store/...-tensorflow-1.9.0/lib/python3.7/site-packages/tensorflow/contrib/seq2seq/python/ops/lib_beam_search_ops.so:
             ;; warning: RUNPATH contains bogus entries: ("/tmp/guix-build-tensorflow-1.9.0.drv-0/source/tensorflow/contrib/build")
             ;; /gnu/store/...-tensorflow-1.9.0/lib/python3.7/site-packages/tensorflow/contrib/seq2seq/python/ops/lib_beam_search_ops.so:
             ;; error: depends on 'libpywrap_tensorflow_internal.so', which
             ;; cannot be found in RUNPATH ...
             (substitute* "tensorflow/contrib/cmake/tf_cc_ops.cmake"
               (("set_target_properties.*")
                (string-append "set_target_properties(${_AT_TARGET} PROPERTIES \
COMPILE_FLAGS ${target_compile_flags} \
INSTALL_RPATH_USE_LINK_PATH TRUE \
INSTALL_RPATH " (assoc-ref outputs "out") "/lib)\n")))
             #t))
         (add-after 'unpack 'find-eigen-headers
           (lambda* (#:key inputs #:allow-other-keys)
             ;; Ensure that Eigen headers can be found
             (setenv "CPLUS_INCLUDE_PATH"
                     (string-append (getenv "CPLUS_INCLUDE_PATH")
                                    ":"
                                    (assoc-ref inputs "eigen")
                                    "/include/eigen3"))
             #t))
         (add-after 'build 'build-pip-package
           (lambda* (#:key outputs #:allow-other-keys)
             (setenv "LDFLAGS"
                     (string-append "-Wl,-rpath="
                                    (assoc-ref outputs "out") "/lib"))
             (invoke "make" "tf_python_build_pip_package")
             #t))
         (add-after 'build-pip-package 'install-python
           (lambda* (#:key outputs #:allow-other-keys)
             (let ((out (assoc-ref outputs "out"))
                   (wheel (car (find-files "../build/tf_python/dist/" "\\.whl$"))))
               (invoke "python" "-m" "pip" "install" wheel
                       (string-append "--prefix=" out))

               ;; XXX: broken RUNPATH, see fix-python-build phase.
               (delete-file (string-append out "/lib/python3.7/site-packages/tensorflow/contrib/seq2seq/python/ops/lib_beam_search_ops.so"))
               #t))))))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ("protobuf" ,protobuf-next)      ; protoc
       ;; The commit hashes and URLs for third-party source code are taken
       ;; from "tensorflow/workspace.bzl".
       ("boringssl-src"
        ,(let ((commit "ee7aa02")
               (revision "1"))
           (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://boringssl.googlesource.com/boringssl")
                   (commit commit)))
             (file-name (string-append "boringssl-0-" revision
                                       (string-take commit 7)
                                       "-checkout"))
             (sha256
              (base32
               "1jf693q0nw0adsic6cgmbdx6g7wr4rj4vxa8j1hpn792fqhd8wgw")))))
       ("cub-src"
        ,(let ((version "1.8.0"))
           (origin
             (method url-fetch)
             (uri (string-append "https://mirror.bazel.build/github.com/NVlabs/"
                                 "cub/archive/" version ".zip"))
             (file-name (string-append "cub-" version ".zip"))
             (sha256
              (base32
               "1hsqikqridb90dkxkjr2918dcry6pfh46ccnwrzawl56aamhdykb")))))
       ("double-conversion-src"
        ,(let ((commit "5664746")
               (revision "1"))
           (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/google/double-conversion.git")
                   (commit commit)))
             (file-name (string-append "double-conversion-0-" revision
                                       (string-take commit 7)
                                       "-checkout"))
             (sha256
              (base32
               "1h5lppqqxcvdg5jq42i5msgwx20ryij3apvmndflngrgdpc04gn1")))))
       ("eigen-src"
        ,(let ((version "fd6845384b86"))
           (origin
             (method url-fetch)
             (uri (string-append "https://mirror.bazel.build/bitbucket.org/"
                                 "eigen/eigen/get/" version ".tar.gz"))
             (file-name (string-append "eigen-" version ".tar.gz"))
             (sha256
              (base32
               "1aan4mvan8i5xsx4ivyqlg8ckbnnaqjw6i9ad8my992gg1fl2mnr")))))
       ("farmhash-src"
        ,(let ((commit "816a4ae622e964763ca0862d9dbd19324a1eaf45"))
           (origin
             (method url-fetch)
             (uri (string-append
                   "https://mirror.bazel.build/github.com/google/farmhash/archive/"
                   commit ".tar.gz"))
             (file-name (string-append "farmhash-0-"
                                       (string-take commit 7)
                                       ".tar.gz"))
             (sha256
              (base32
               "185b2xdxl4d4cnsnv6abg8s22gxvx8673jq2yaq85bz4cdy58q35")))))
       ;; The license notice on the home page at
       ;; http://www.kurims.kyoto-u.ac.jp/~ooura/fft.html says:
       ;;   Copyright Takuya OOURA, 1996-2001
       ;;
       ;;   You may use, copy, modify and distribute this code for any purpose
       ;;   (include commercial use) and without fee. Please refer to this
       ;;   package when you modify this code.
       ;;
       ;; We take the identical tarball from the Bazel mirror, because the URL
       ;; at the home page is not versioned and might change.
       ("fft2d-src"
        ,(origin
           (method url-fetch)
           (uri "https://mirror.bazel.build/www.kurims.kyoto-u.ac.jp/~ooura/fft.tgz")
           (file-name "fft2d.tar.gz")
           (sha256
            (base32
             "15jjkfvhqvl2c0753d2di8hz0pyzn598g74wqy79awdrf1y67fsj"))))
       ("grpc-src"
        ,(let ((version "d184fa229d75d336aedea0041bd59cb93e7e267f"))
           (origin
             (method url-fetch)
             (uri (string-append
                   "https://mirror.bazel.build/"
                   "github.com/grpc/grpc/archive/"
                   version".tar.gz"))
             (file-name (string-append "grpc-" version ".tar.gz"))
             (sha256
              (base32
               "0wsn0yvwnc08i9cq76083kgfv9k8q1wafnap6gvn32ki1qqk2nw9")))))
       ("highwayhash-src"
        ,(let ((commit "be5edafc2e1a455768e260ccd68ae7317b6690ee")
               (revision "1"))
           (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/google/highwayhash.git")
                   (commit commit)))
             (file-name (string-append "highwayhash-0-" revision
                                       (string-take commit 7)
                                       "-checkout"))
             (sha256
              (base32
               "154jwf98cyy54hldr94pgjn85zynly3abpnc1avmb8a18lzwjyb6")))))
       ("jsoncpp-src"
        ,(let ((commit "4356d9b")
               (revision "1"))
           (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/open-source-parsers/jsoncpp.git")
                   (commit commit)))
             (file-name (string-append "jsoncpp-0-" revision
                                       (string-take commit 7)
                                       "-checkout"))
             (sha256
              (base32
               "1anixxs5nwqknmcdxjd9zii5x0z7jx5qy011narjp2vxid59dzqa")))))
       ("nsync-src"
        ,(let ((version "0559ce013feac8db639ee1bf776aca0325d28777")
               (revision "1"))
           (origin
             (method url-fetch)
             (uri (string-append "https://mirror.bazel.build/"
                                 "github.com/google/nsync/archive/"
                                 version ".tar.gz"))
             (file-name (string-append "nsync-0." revision
                                       "-" (string-take version 7)
                                       ".tar.gz"))
             (sha256
              (base32
               "0qdkyqym34x739mmzv97ah5r7ph462v5xkxqxvidmcfqbi64b132")))))
       ("protobuf-src"
        ,(let ((version "396336eb961b75f03b25824fe86cf6490fb75e3a"))
           (origin
             (method url-fetch)
             (uri (string-append "https://mirror.bazel.build/"
                                 "github.com/google/protobuf/archive/"
                                 version ".tar.gz"))
             (file-name (string-append "protobuf-" version ".tar.gz"))
             (sha256
              (base32
               "1qsr5hgmmikshrg3035q6klbpv945lxfz0h8xhry4aj7rxx90vc4")))))
       ("re2-src"
        ,(let ((commit "e7efc48")
               (revision "1"))
           (origin
             (method git-fetch)
             (uri (git-reference
                   (url "https://github.com/google/re2")
                   (commit commit)))
             (file-name (string-append "re2-0-" revision
                                       (string-take commit 7)
                                       "-checkout"))
             (sha256
              (base32
               "161g9841rjfsy5pn52fcis0s9hdr7rxvb06pad38j5rppfihvign")))))
       ("snappy-src"
        ,(let ((version "1.1.7"))
           (origin
             (method url-fetch)
             (uri (string-append "https://mirror.bazel.build/"
                                 "github.com/google/snappy/archive/"
                                 version ".tar.gz"))
             (file-name (string-append "snappy-" version ".tar.gz"))
             (sha256
              (base32
               "1m7rcdqzkys5lspj8jcsaah8w33zh28s771bw0ga2lgzfgl05yix")))))
       ("googletest" ,googletest)
       ("swig" ,swig)
       ("unzip" ,unzip)))
    (propagated-inputs
     `(("python-absl-py" ,python-absl-py)
       ("python-astor" ,python-astor)
       ("python-gast" ,python-gast)
       ("python-grpcio" ,python-grpcio)
       ("python-numpy" ,python-numpy)
       ("python-protobuf" ,python-protobuf)
       ("python-six" ,python-six)
       ("python-termcolo" ,python-termcolor)
       ("python-wheel" ,python-wheel)))
    (inputs
     `(("c-ares" ,c-ares-next)          ; for grpc
       ("eigen" ,eigen)
       ("gemmlowp" ,gemmlowp-for-tensorflow)
       ("lmdb" ,lmdb)
       ("libjpeg" ,libjpeg)
       ("libpng" ,libpng)
       ("giflib" ,giflib)
       ("sqlite" ,sqlite)
       ("python" ,python-wrapper)
       ("zlib" ,zlib)))
    (home-page "https://tensorflow.org")
    (synopsis "Machine learning framework")
    (description
     "TensorFlow is a software library for high performance numerical
computation.  Its flexible architecture allows easy deployment of computation
across a variety of platforms, and from desktops to clusters of servers to
mobile and edge devices.")
    (license license:asl2.0)))

(define-public dlib
  (package
    (name "dlib")
    (version "19.7")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://dlib.net/files/dlib-" version ".tar.bz2"))
              (sha256
               (base32
                "1mljz02kwkrbggyncxv5fpnyjdybw2qihaacb3js8yfkw12vwpc2"))
              (modules '((guix build utils)))
              (snippet
               '(begin
                  ;; Delete ~13MB of bundled dependencies.
                  (delete-file-recursively "dlib/external")
                  (delete-file-recursively "docs/dlib/external")
                  #t))))
    (build-system cmake-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'disable-asserts
           (lambda _
             ;; config.h recommends explicitly enabling or disabling asserts
             ;; when building as a shared library. By default neither is set.
             (substitute* "dlib/config.h"
               (("^//#define DLIB_DISABLE_ASSERTS") "#define DLIB_DISABLE_ASSERTS"))
             #t))
         (add-after 'disable-asserts 'disable-failing-tests
           (lambda _
             ;; One test times out on MIPS, so we need to disable it.
             ;; Others are flaky on some platforms.
             (let* ((system ,(or (%current-target-system)
                                 (%current-system)))
                    (disabled-tests (cond
                                     ((string-prefix? "mips64" system)
                                      '("object_detector" ; timeout
                                        "data_io"))
                                     ((string-prefix? "armhf" system)
                                      '("learning_to_track"))
                                     ((string-prefix? "i686" system)
                                      '("optimization"))
                                     (else '()))))
               (for-each
                (lambda (test)
                  (substitute* "dlib/test/makefile"
                    (((string-append "SRC \\+= " test "\\.cpp")) "")))
                disabled-tests)
               #t)))
         (replace 'check
           (lambda _
             ;; No test target, so we build and run the unit tests here.
             (let ((test-dir (string-append "../dlib-" ,version "/dlib/test")))
               (with-directory-excursion test-dir
                 (invoke "make" "-j" (number->string (parallel-job-count)))
                 (invoke "./dtest" "--runall"))
               #t)))
         (add-after 'install 'delete-static-library
           (lambda* (#:key outputs #:allow-other-keys)
             (delete-file (string-append (assoc-ref outputs "out")
                                         "/lib/libdlib.a"))
             #t)))))
    (native-inputs
     `(("pkg-config" ,pkg-config)
       ;; For tests.
       ("libnsl" ,libnsl)))
    (inputs
     `(("giflib" ,giflib)
       ("lapack" ,lapack)
       ("libjpeg" ,libjpeg)
       ("libpng" ,libpng)
       ("libx11" ,libx11)
       ("openblas" ,openblas)
       ("zlib" ,zlib)))
    (synopsis
     "Toolkit for making machine learning and data analysis applications in C++")
    (description
     "Dlib is a modern C++ toolkit containing machine learning algorithms and
tools.  It is used in both industry and academia in a wide range of domains
including robotics, embedded devices, mobile phones, and large high performance
computing environments.")
    (home-page "http://dlib.net")
    (license license:boost1.0)))

(define-public python-scikit-learn
  (package
    (name "python-scikit-learn")
    (version "0.20.1")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
             (url "https://github.com/scikit-learn/scikit-learn.git")
             (commit version)))
       (file-name (git-file-name name version))
       (sha256
        (base32
         "0fkhwg3xn1s7ln9q1szq6kwc4jhwvjh8w4kmv9wcrqy7cq3lbv0d"))))
    (build-system python-build-system)
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'build 'build-ext
           (lambda _ (invoke "python" "setup.py" "build_ext" "--inplace") #t))
         (replace 'check
           (lambda _
             ;; Restrict OpenBLAS threads to prevent segfaults while testing!
             (setenv "OPENBLAS_NUM_THREADS" "1")

             ;; Some tests require write access to $HOME.
             (setenv "HOME" "/tmp")

             (invoke "pytest" "sklearn" "-m" "not network")))
         ;; FIXME: This fails with permission denied
         (delete 'reset-gzip-timestamps))))
    (inputs
     `(("openblas" ,openblas)))
    (native-inputs
     `(("python-pytest" ,python-pytest)
       ("python-pandas" ,python-pandas) ;for tests
       ("python-cython" ,python-cython)))
    (propagated-inputs
     `(("python-numpy" ,python-numpy)
       ("python-scipy" ,python-scipy)))
    (home-page "http://scikit-learn.org/")
    (synopsis "Machine Learning in Python")
    (description
     "Scikit-learn provides simple and efficient tools for data mining and
data analysis.")
    (license license:bsd-3)))

(define-public python2-scikit-learn
  (package-with-python2 python-scikit-learn))

(define-public python-autograd
  (let* ((commit "442205dfefe407beffb33550846434baa90c4de7")
         (revision "0")
         (version (git-version "0.0.0" revision commit)))
    (package
      (name "python-autograd")
      (home-page "https://github.com/HIPS/autograd")
      (source (origin
                (method git-fetch)
                (uri (git-reference
                      (url home-page)
                      (commit commit)))
                (sha256
                 (base32
                  "189sv2xb0mwnjawa9z7mrgdglc1miaq93pnck26r28fi1jdwg0z4"))
                (file-name (git-file-name name version))))
      (version version)
      (build-system python-build-system)
      (native-inputs
       `(("python-nose" ,python-nose)
         ("python-pytest" ,python-pytest)))
      (propagated-inputs
       `(("python-future" ,python-future)
         ("python-numpy" ,python-numpy)))
      (arguments
       `(#:phases (modify-phases %standard-phases
                    (replace 'check
                      (lambda _
                        (invoke "py.test" "-v"))))))
      (synopsis "Efficiently computes derivatives of NumPy code")
      (description "Autograd can automatically differentiate native Python and
NumPy code.  It can handle a large subset of Python's features, including loops,
ifs, recursion and closures, and it can even take derivatives of derivatives
of derivatives.  It supports reverse-mode differentiation
(a.k.a. backpropagation), which means it can efficiently take gradients of
scalar-valued functions with respect to array-valued arguments, as well as
forward-mode differentiation, and the two can be composed arbitrarily.  The
main intended application of Autograd is gradient-based optimization.")
      (license license:expat))))

(define-public python2-autograd
  (package-with-python2 python-autograd))

(define-public lightgbm
  (package
    (name "lightgbm")
    (version "2.0.12")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/Microsoft/LightGBM/archive/v"
                    version ".tar.gz"))
              (sha256
               (base32
                "132zf0yk0545mg72hyzxm102g3hpb6ixx9hnf8zd2k55gas6cjj1"))
              (file-name (string-append name "-" version ".tar.gz"))))
    (native-inputs
     `(("python-pytest" ,python-pytest)
       ("python-nose" ,python-nose)))
    (inputs
     `(("openmpi" ,openmpi)))
    (propagated-inputs
     `(("python-numpy" ,python-numpy)
       ("python-scipy" ,python-scipy)))
    (arguments
     `(#:configure-flags
       '("-DUSE_MPI=ON")
       #:phases
       (modify-phases %standard-phases
         (replace 'check
           (lambda* (#:key outputs #:allow-other-keys)
             (with-directory-excursion ,(string-append "../LightGBM-" version)
               (invoke "pytest" "tests/c_api_test/test_.py")))))))
    (build-system cmake-build-system)
    (home-page "https://github.com/Microsoft/LightGBM")
    (synopsis "Gradient boosting framework based on decision tree algorithms")
    (description "LightGBM is a gradient boosting framework that uses tree
based learning algorithms.  It is designed to be distributed and efficient with
the following advantages:

@itemize
@item Faster training speed and higher efficiency
@item Lower memory usage
@item Better accuracy
@item Parallel and GPU learning supported (not enabled in this package)
@item Capable of handling large-scale data
@end itemize\n")
    (license license:expat)))

(define-public vowpal-wabbit
  ;; Language bindings not included.
  (package
    (name "vowpal-wabbit")
    (version "8.5.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/JohnLangford/vowpal_wabbit/archive/"
                    version ".tar.gz"))
              (sha256
               (base32
                "0clp2kb7rk5sckhllxjr5a651awf4s8dgzg4659yh4hf5cqnf0gr"))
              (file-name (string-append name "-" version ".tar.gz"))))
    (inputs
     `(("boost" ,boost)
       ("zlib" ,zlib)))
    (arguments
     `(#:configure-flags
       (list (string-append "--with-boost="
                            (assoc-ref %build-inputs "boost")))))
    (build-system gnu-build-system)
    (home-page "https://github.com/JohnLangford/vowpal_wabbit")
    (synopsis "Fast machine learning library for online learning")
    (description "Vowpal Wabbit is a machine learning system with techniques
such as online, hashing, allreduce, reductions, learning2search, active, and
interactive learning.")
    (license license:bsd-3)))