guix-devel/gnu/packages/code.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2015, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2016, 2017 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2017, 2018 Tobias Geerinckx-Rice <me@tobias.gr>
;;; Copyright © 2017, 2018 Clément Lassieur <clement@lassieur.org>
;;; Copyright © 2017 Andy Wingo <wingo@igalia.com>
;;; Copyright © 2018 Fis Trivial <ybbs.daans@hotmail.com>
;;; Copyright © 2018 Pierre Neidhardt <ambrevar@gmail.com>
;;; Copyright © 2014 Eric Bavier <bavier@member.fsf.org>
;;; Copyright © 2013 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
;;;
;;; 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 code)
  #:use-module (guix packages)
  #:use-module (guix download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system cmake)
  #:use-module (guix build-system trivial)
  #:use-module (gnu packages)
  #:use-module (gnu packages base)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages cpp)
  #:use-module (gnu packages databases)
  #:use-module (gnu packages emacs)
  #:use-module (gnu packages gcc)
  #:use-module (gnu packages graphviz)
  #:use-module (gnu packages pcre)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages texinfo)
  #:use-module (gnu packages autogen)
  #:use-module (gnu packages ncurses)
  #:use-module (gnu packages autotools)
  #:use-module (gnu packages llvm)
  #:use-module (gnu packages lua)
  #:use-module (gnu packages bash))

;;; Tools to deal with source code: metrics, cross-references, etc.

(define-public cflow
  (package
    (name "cflow")
    (version "1.5")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnu/cflow/cflow-"
                                  version ".tar.bz2"))
              (sha256
               (base32
                "0yq33k5ap1zpnja64n89iai4zh018ffr72wki5a6mzczd880mr3g"))))
    (build-system gnu-build-system)

    ;; Needed to have cflow-mode.el installed.
    (native-inputs `(("emacs" ,emacs-minimal)))
    (arguments
     '(#:configure-flags (list (string-append "CPPFLAGS="
                                              "-D" "CFLOW_PREPROC=\\\""
                                              (assoc-ref %build-inputs "gcc")
                                              "/bin/cpp\\\""))))
    (home-page "https://www.gnu.org/software/cflow/")
    (synopsis "Create a graph of control flow within a program")
    (description
     "GNU cflow analyzes C source files and produces a graph charting the
control flow of the program.  It can output the graph in several styles and
in either the POSIX format or in an extended GNU format.  cflow also includes
a major mode for Emacs for examining the flowcharts that it produces.")
    (license license:gpl3+)))

(define-public complexity
  (package
    (name "complexity")
    (version "1.10")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://gnu/complexity/complexity-"
                                  version ".tar.xz"))
              (sha256
               (base32
                "0lr0l9kj2w3jilz9h9y4np9pf9i9ccpy6331lanki2fnz4z8ldvd"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("texinfo" ,texinfo)
       ("autogen" ,autogen)))
    (home-page "https://www.gnu.org/software/complexity/")
    (synopsis "Analyze complexity of C functions")
    (description
     "GNU complexity provides tools for finding procedures that are
convoluted, overly long or otherwise difficult to understand.  This
may help in learning or reviewing unfamiliar code or perhaps
highlighting your own code that seemed comprehensible when you wrote it.")
    (license license:gpl3+)))

(define-public global                             ; a global variable
  (package
    (name "global")
    (version "6.6.2")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnu/global/global-"
                                 version ".tar.gz"))
             (sha256
              (base32
               "0zvi5vxwiq0dy8mq2cgs64m8harxs0fvkmsnvi0ayb0w608lgij3"))))
    (build-system gnu-build-system)
    (inputs `(("ncurses" ,ncurses)
              ("libltdl" ,libltdl)
              ("sqlite" ,sqlite)))
    (arguments
     `(#:configure-flags
       (list (string-append "--with-ncurses="
                            (assoc-ref %build-inputs "ncurses"))
             (string-append "--with-sqlite3="
                            (assoc-ref %build-inputs "sqlite")))

       #:phases
       (modify-phases %standard-phases
        (add-after 'install 'post-install
          (lambda* (#:key outputs #:allow-other-keys)
            ;; Install the Emacs Lisp file in the right place.
            (let* ((out  (assoc-ref outputs "out"))
                   (data (string-append out "/share/gtags"))
                   (lisp (string-append out "/share/emacs/site-lisp")))
              (install-file (string-append data "/gtags.el") lisp)
              (delete-file (string-append data "/gtags.el"))
              #t))))))
    (home-page "https://www.gnu.org/software/global/")
    (synopsis "Cross-environment source code tag system")
    (description
     "GNU GLOBAL is a source code tagging system that functions in the same
way across a wide array of environments, such as different text editors,
shells and web browsers.  The resulting tags are useful for quickly moving
around in a large, deeply nested project.")
    (license license:gpl3+)))

(define-public sloccount
  (package
    (name "sloccount")
    (version "2.26")
    (source (origin
              (method url-fetch)
              (uri (string-append "http://www.dwheeler.com/sloccount/sloccount-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "0ayiwfjdh1946asah861ah9269s5xkc8p5fv1wnxs9znyaxs4zzs"))))
    (build-system gnu-build-system)
    (arguments
     '(#:phases (modify-phases %standard-phases
                  (delete 'configure)
                  (add-before 'build 'make-dotl-files-older
                              (lambda _
                                ;; Make the '.l' files as old as the '.c'
                                ;; files to avoid triggering the rule that
                                ;; requires Flex.
                                (define ref
                                  (stat "README"))

                                (for-each (lambda (file)
                                            (set-file-time file ref))
                                          (find-files "." "\\.[chl]$"))
                                #t))
                  (add-before 'install 'make-target-directories
                              (lambda* (#:key outputs #:allow-other-keys)
                                (let ((out (assoc-ref outputs "out")))
                                  (mkdir-p (string-append out "/bin"))
                                  (mkdir-p (string-append out
                                                          "/share/man/man1"))
                                  (mkdir-p (string-append out
                                                          "/share/doc")))))
                  (replace 'check
                           (lambda _
                             (setenv "HOME" (getcwd))
                             (setenv "PATH"
                                     (string-append (getcwd) ":"
                                                    (getenv "PATH")))
                             (zero? (system* "make" "test")))))

        #:make-flags (list (string-append "PREFIX="
                                          (assoc-ref %outputs "out")))))
    (inputs `(("perl" ,perl)))
    (home-page "http://www.dwheeler.com/sloccount/")
    (synopsis "Count physical source lines of code (SLOC)")
    (description
     "SLOCCount is a set of the programs for counting source lines of
code (SLOC) in large software systems.  It can automatically identify and
measure a wide range of programming languages.  It automatically estimates the
effort, time, and money it would take to develop the software, using the
COCOMO model or user-provided parameters.")
    (license license:gpl2+)))

(define-public cloc
  (package
    (name "cloc")
    (version "1.76")
    (source
     (origin
       (method url-fetch)
       (uri (string-append
             "https://github.com/AlDanial/cloc/releases/download/v" version
             "/cloc-" version ".tar.gz"))
       (sha256
        (base32
         "05srlvzwisr7y7ymvzb5yfdsrspja27ysqdmkwhiiivy84mq2gnl"))))
    (build-system gnu-build-system)
    (inputs
     `(("coreutils" ,coreutils)
       ("perl" ,perl)
       ("perl-algorithm-diff" ,perl-algorithm-diff)
       ("perl-digest-md5" ,perl-digest-md5)
       ("perl-parallel-forkmanager" ,perl-parallel-forkmanager)
       ("perl-regexp-common" ,perl-regexp-common)))
    (arguments
     `(#:phases (modify-phases %standard-phases
                  (delete 'configure)
                  (delete 'build)
                  (replace 'install
                    (lambda* (#:key inputs outputs #:allow-other-keys)
                      (let* ((out (assoc-ref outputs "out")))
                        (invoke "make" "-C" "Unix"
                                (string-append "prefix=" out)
                                (string-append "INSTALL="
                                               (assoc-ref inputs "coreutils")
                                               "/bin/install")
                                "install")
                        #t)))
                  (add-after 'install 'wrap-program
                    (lambda* (#:key inputs outputs #:allow-other-keys)
                      (let ((out (assoc-ref outputs "out")))
                        (wrap-program (string-append out "/bin/cloc")
                          `("PERL5LIB" ":" =
                            ,(string-split (getenv "PERL5LIB") #\:)))
                        #t))))
       #:out-of-source? #t
       ;; Tests require some other packages.
       #:tests? #f))
    (home-page "https://github.com/AlDanial/cloc")
    (synopsis "Count source lines of code (SLOC) and other source code metrics")
    (description "cloc counts blank lines, comment lines, and physical lines
of source code in many programming languages.  Given two versions of a code
base, cloc can compute differences in blank, comment, and source lines.

cloc contains code from David Wheeler's SLOCCount.  Compared to SLOCCount,
cloc can handle a greater variety of programming languages.")
    (license license:gpl2+)))

(define-public the-silver-searcher
  (package
    (name "the-silver-searcher")
    (version "2.1.0")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "http://geoff.greer.fm/ag/releases/the_silver_searcher-"
                    version ".tar.gz"))
              (sha256
               (base32
                "1m0mih1x4jpswc8ganhqh0gmwbmd2hzmz7402mxfh19s3kcjnrfl"))))
    (build-system gnu-build-system)
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("pcre" ,pcre)
       ("xz" ,xz)
       ("zlib" ,zlib)))
    (home-page "http://geoff.greer.fm/ag/")
    (synopsis "Fast code searching tool")
    (description
     "The Silver Searcher (@command{ag}) is a tool for quickly searching large
numbers of files.  It's intended primarily for source code repositories, and
respects files like @file{.gitignore} and @file{.hgignore}.  It's also an order
of magnitude faster than its inspiration, @command{ack}, and less specialised
tools such as @command{grep}.")
    (license license:asl2.0)))

(define-public trio
  (package
    (name "trio")
    (version "1.16")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/ctrio/trio/trio-"
                                  version ".tar.gz"))
              (sha256
               (base32
                "02pwd5m5vq7hbrffgm2na1dfc249z50yyr5jv73vdw15bd7ygl44"))))
    (build-system gnu-build-system)
    (home-page "http://daniel.haxx.se/projects/trio/")
    (synopsis "Portable and extendable printf and string functions")
    (description
     "Trio is a set of @code{printf} and string functions designed be used by
applications with a focus on portability or with the need for additional
features that are not supported by the standard @code{stdio} implementation.")
    ;; This license is very similar to the ISC license, but the wording is
    ;; slightly different.
    (license (license:non-copyleft
              "http://sourceforge.net/p/ctrio/git/ci/master/tree/README"))))

(define-public withershins
  (package
    (name "withershins")
    (version "0.1")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/cameronwhite/withershins/archive/v"
                    version ".tar.gz"))
              (file-name (string-append name "-" version ".tar.gz"))
              (sha256
               (base32
                "08z3lyvswx7sad10637vfpwglbcbgzzcpfihw0x8lzr74f3b70bh"))))
    (build-system cmake-build-system)
    (arguments
     `(#:out-of-source? #f
       #:phases
       (modify-phases %standard-phases
         (add-after
          'unpack 'find-libiberty
          (lambda _
            (let ((libiberty (assoc-ref %build-inputs "libiberty")))
              (substitute* "cmake/FindIberty.cmake"
                (("/usr/include") (string-append libiberty "/include"))
                (("libiberty.a iberty")
                 (string-append "NAMES libiberty.a iberty\nPATHS \""
                                libiberty "/lib" "\"")))
              #t)))
         (replace
          'install
          (lambda* (#:key outputs #:allow-other-keys)
            (let* ((out (assoc-ref outputs "out"))
                   (include (string-append out "/include"))
                   (lib (string-append out "/lib")))
              (mkdir-p include)
              (install-file "src/withershins.hpp" include)
              (mkdir-p lib)
              (install-file "src/libwithershins.a" lib))
            #t)))))
    (home-page "https://github.com/cameronwhite/withershins")
    (inputs
     `(("libiberty" ,libiberty)
       ("binutils" ,binutils) ;for libbfd
       ("zlib" ,zlib)))
    (synopsis "C++11 library for generating stack traces")
    (description
     "Withershins is a simple cross-platform C++11 library for generating
stack traces.")
    ;; Sources are released under Expat license, but since BFD is licensed
    ;; under the GPLv3+ the combined work is GPLv3+ as well.
    (license license:gpl3+)))

(define-public lcov
  (package
    (name "lcov")
    (version "1.13")
    (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/ltp/Coverage%20Analysis"
                                  "/LCOV-" version "/lcov-" version ".tar.gz"))
              (sha256
               (base32
                "08wabnb0gcjqk0qc65a6cgbbmz6b8lvam3p7byh0dk42hj3jr5s4"))))
    (build-system gnu-build-system)
    (arguments
     '(#:make-flags
       (let ((out (assoc-ref %outputs "out")))
         (list (string-append "PREFIX=" out)))
       #:phases
       (modify-phases %standard-phases
         (delete 'configure))           ; no configure script
       #:tests? #f))                    ; no 'check' target
    (inputs `(("perl" ,perl)))
    (home-page "http://ltp.sourceforge.net/coverage/lcov.php")
    (synopsis "Code coverage tool that enhances GNU gcov")
    (description
     "LCOV is an extension of @command{gcov}, a tool part of the
GNU@tie{}Binutils, which provides information about what parts of a program
are actually executed (i.e., \"covered\") while running a particular test
case.  The extension consists of a set of Perl scripts which build on the
textual @command{gcov} output to implement the following enhanced
functionality such as HTML output.")
    (license license:gpl2+)))

(define-public rtags
  (package
    (name "rtags")
    (version "2.18")
    (home-page "https://github.com/Andersbakken/rtags")
    (source
     (origin
       (method url-fetch)
       (uri
        (string-append home-page "/archive/v" version ".tar.gz"))
       (file-name (string-append name "-" version ".tar.gz"))
       (patches (search-patches "rtags-separate-rct.patch"))
       (modules '((guix build utils)))
       (snippet
        ;; Part of spliting rct with rtags.
        ;; Substitute #include "rct/header.h" with #include <rct/header.h>.
        '(with-directory-excursion "src"
           (delete-file-recursively "rct")        ;remove bundled copy
           (let ((files (find-files "." ".*\\.cpp|.*\\.h")))
             (substitute* files
               (("#include ?\"rct/(.*.h)\"" all header)
                (string-append "#include <rct/" header ">"))))))
       (sha256
        (base32
         "0scjbp1z201q8njvrxqz7lk2m9b6k2rxd5q1shrng6532r7ndif2"))))
    (build-system cmake-build-system)
    (arguments
     '(#:build-type "RelWithDebInfo"
       #:configure-flags
       '("-DRTAGS_NO_ELISP_FILES=1"
         "-DCMAKE_CXX_FLAGS=-std=c++11"
         "-DBUILD_TESTING=FALSE")
       #:tests? #f))
    (native-inputs
     `(("pkg-config" ,pkg-config)))
    (inputs
     `(("bash-completion" ,bash-completion)
       ("clang" ,clang)
       ("llvm" ,llvm)
       ("lua" ,lua)
       ("rct" ,rct)
       ("selene" ,selene)))
    (synopsis "Indexer for the C language family with Emacs integration")
    (description
     "RTags is a client/server application that indexes C/C++ code and keeps a
persistent file-based database of references, declarations, definitions,
symbolnames etc.  There’s also limited support for ObjC/ObjC++.  It allows you
to find symbols by name (including nested class and namespace scope).  Most
importantly we give you proper follow-symbol and find-references support.")
    (license license:gpl3+)))

(define-public colormake
  (package
    (name "colormake")
    (version "0.9.20140503")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "https://github.com/pagekite/Colormake/archive/"
                           version ".tar.gz"))
       (file-name (string-append name "-" version ".tar.gz"))
       (sha256
        (base32
         "08ldss9zd8ls6bjahvxhffpsjcysifr720yf3jz9db2mlklzmyd3"))))
    (build-system trivial-build-system)
    (native-inputs
     `(("bash" ,bash)
       ("gzip" ,gzip)
       ("perl" ,perl)
       ("tar" ,tar)))
    (arguments
     `(#:modules ((guix build utils))
       #:builder
       (begin
         (use-modules (guix build utils))
         ;; bootstrap
         (setenv "PATH" (string-append
                         (assoc-ref %build-inputs "tar") "/bin" ":"
                         (assoc-ref %build-inputs "gzip") "/bin"))
         (invoke "tar" "xvf" (assoc-ref %build-inputs "source"))
         (chdir (string-append (string-capitalize ,name) "-" ,version))
         (patch-shebang  "colormake.pl"
                         (list (string-append (assoc-ref %build-inputs "perl")
                                              "/bin")))
         (let* ((out (assoc-ref %outputs "out"))
                (bin (string-append out "/bin"))
                (doc (string-append out "/share/doc"))
                (install-files (lambda (files directory)
                                 (for-each (lambda (file)
                                             (install-file file directory))
                                           files))))
           (substitute* "colormake"
             (("colormake\\.pl") (string-append bin "/colormake.pl"))
             (("/bin/bash")
              (string-append (assoc-ref %build-inputs "bash") "/bin/sh")))
           (install-file "colormake.1" (string-append doc "/man/man1"))
           (install-files '("AUTHORS" "BUGS" "ChangeLog" "README") doc)
           (install-files '("colormake" "colormake-short" "clmake"
                            "clmake-short" "colormake.pl")
                          bin)))))
    (home-page "http://bre.klaki.net/programs/colormake/")
    (synopsis "Wrapper around @command{make} to produce colored output")
    (description "This package provides a wrapper around @command{make} to
produce colored output.")
    (license license:gpl2+)))

(define-public makefile2graph
  (package
    (name "makefile2graph")
    (version "1.5.0")
    (source (origin
              (method url-fetch)
              (uri (string-append "https://github.com/lindenb/" name
                                  "/archive/v" version ".tar.gz"))
              (sha256
               (base32
                "0h1vchkpmm9h6s87p5nf0ksjxcmsxpx8k62a508w428n570wcr4l"))
              (file-name (string-append name "-" version ".tar.gz"))))
    (build-system gnu-build-system)
    (arguments
     '(#:test-target "test"
       #:make-flags (list "CC=gcc" (string-append "prefix=" %output))
       #:phases
       (modify-phases %standard-phases
         (delete 'configure))))
    (native-inputs
     `(("graphviz" ,graphviz)))
    (home-page "https://github.com/lindenb/makefile2graph")
    (synopsis "Creates a graph of dependencies from GNU Make")
    (description
     "@code{make2graph} creates a graph of dependencies from GNU Make.  The
output is a graphviz-dot file, a Gexf-XML file or a list of the deepest
independent targets.")
    (license license:expat)))

(define-public uncrustify
  (package
    (name "uncrustify")
    (version "0.67")
    (source (origin
              (method url-fetch)
              (uri (string-append
                    "https://github.com/uncrustify/uncrustify/archive/"
                    "uncrustify-" version ".zip"))
              (sha256
               (base32
                "0n13kq0nsm35fxhdp0f275n4x0w88hdv3bdjy0hgvv42x0dx5zyp"))))
    (build-system cmake-build-system)
    (native-inputs
     `(("unzip" ,unzip)))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'unpack-etc
           (lambda* (#:key inputs outputs #:allow-other-keys)
             ;; Configuration samples are not installed by default.
             (let* ((output (assoc-ref outputs "out"))
                    (etcdir (string-append output "/etc")))
               (for-each (lambda (l)
                           (install-file l etcdir))
                         (find-files "etc" "\\.cfg$")))
             #t)))))
    (home-page "http://uncrustify.sourceforge.net/")
    (synopsis "Code formatter for C and other related languages")
    (description
     "Beautify source code in many languages of the C family (C, C++, C#,
Objective@tie{}C, D, Java, Pawn, and Vala).  Features:
@itemize
@item Indent and align code.
@item Reformat comments (a little bit).
@item Fix inter-character spacing.
@item Add or remove parens / braces.
@item Supports embedded SQL @code{EXEC SQL} stuff.
@item Highly configurable - More than 600 configurable options.
@end itemize\n")
    (license license:gpl2+)))

(define-public astyle
  (package
    (name "astyle")
    (version "2.05")
    (source
     (origin
       (method url-fetch)
       (uri (string-append "mirror://sourceforge/astyle/astyle/astyle%20"
                           version "/astyle_"  version "_linux.tar.gz"))
       (sha256
        (base32
         "0f9sh9kq5ajp1yz133h00fr9235p1m698x7n3h7zbrhjiwgynd6s"))))
    (build-system gnu-build-system)
    (arguments
     `(#:tests? #f                      ;no tests
       #:make-flags (list (string-append "prefix=" %output)
                          "INSTALL=install"
                          "all")
       #:phases
       (modify-phases %standard-phases
         (replace 'configure
           (lambda _ (chdir "build/gcc") #t))
         (add-after 'install 'install-libs
           (lambda* (#:key outputs #:allow-other-keys)
             ;; Libraries are not installed by default
             (let* ((output (assoc-ref outputs "out"))
                    (libdir (string-append output "/lib")))
               (begin
                 (mkdir-p libdir)
                 (for-each (lambda (l)
                             (copy-file
                              l (string-append libdir "/" (basename l))))
                           (find-files "bin" "lib*"))))
             #t)))))
    (home-page "http://astyle.sourceforge.net/")
    (synopsis "Source code indenter, formatter, and beautifier")
    (description
     "Artistic Style is a source code indenter, formatter, and beautifier for
the C, C++, C++/CLI, Objective‑C, C#, and Java programming languages.")
    (license license:lgpl3+)))

(define-public indent
  (package
   (name "indent")
   (version "2.2.10")
   (source (origin
            (method url-fetch)
            (uri (string-append "mirror://gnu/indent/indent-" version
                                ".tar.gz"))
            (sha256 (base32
                     "0f9655vqdvfwbxvs1gpa7py8k1z71aqh8hp73f65vazwbfz436wa"))))
   (build-system gnu-build-system)
   (arguments
    `(#:phases (alist-cons-after
                'unpack 'fix-docdir
                (lambda _
                  ;; Although indent uses a modern autoconf in which docdir
                  ;; defaults to PREFIX/share/doc, the doc/Makefile.am
                  ;; overrides this to be in PREFIX/doc.  Fix this.
                  (substitute* "doc/Makefile.in"
                    (("^docdir = .*$") "docdir = @docdir@\n")))
                %standard-phases)))
   (synopsis "Code reformatter")
   (description
    "Indent is a program that makes source code easier to read by
reformatting it in a consistent style.  It can change the style to one of
several different styles such as GNU, BSD or K&R.  It has some flexibility to
deal with incomplete or malformed syntax.  GNU indent offers several
extensions over the standard utility.")
   (license license:gpl3+)
   (home-page "https://www.gnu.org/software/indent/")))