code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
;;; Copyright © 2020 Morgan Smith <Morgan.J.Smith@outlook.com>
;;;
;;; 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 (guix build-system emacs)
  #:use-module ((guix build emacs-build-system)
                #:select (%default-include %default-exclude))
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix packages)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-26)
  #:export (%emacs-build-system-modules
            emacs-build
            emacs-build-system)
  #:re-export (%default-include         ;for convenience
               %default-exclude))

;; Commentary:
;;
;; Standard build procedure for Emacs packages.  This is implemented as an
;; extension of 'gnu-build-system'.
;;
;; Code:

(define %emacs-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build emacs-build-system)
    (guix build emacs-utils)
    ,@%gnu-build-system-modules))

(define (default-emacs)
  "Return the default Emacs package."
  ;; Lazily resolve the binding to avoid a circular dependency.
  (let ((emacs-mod (resolve-interface '(gnu packages emacs))))
    (module-ref emacs-mod 'emacs-minimal)))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (emacs (default-emacs))
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:target #:emacs #:inputs #:native-inputs))

  (and (not target)                               ;XXX: no cross-compilation
       (bag
         (name name)
         (system system)
         (host-inputs `(,@(if source
                              `(("source" ,source))
                              '())
                        ,@inputs

                        ;; Keep the standard inputs of 'gnu-build-system'.
                        ,@(standard-packages)))
         (build-inputs `(("emacs" ,emacs)
                         ,@native-inputs))
         (outputs outputs)
         (build emacs-build)
         (arguments (strip-keyword-arguments private-keywords arguments)))))

(define* (emacs-build store name inputs
                      #:key source
                      (tests? #f)
                      (parallel-tests? #t)
                      (test-command ''("make" "check"))
                      (phases '(@ (guix build emacs-build-system)
                                  %standard-phases))
                      (outputs '("out"))
                      (include (quote %default-include))
                      (exclude (quote %default-exclude))
                      (search-paths '())
                      (system (%current-system))
                      (guile #f)
                      (imported-modules %emacs-build-system-modules)
                      (modules '((guix build emacs-build-system)
                                 (guix build utils)
                                 (guix build emacs-utils))))
  "Build SOURCE using EMACS, and with INPUTS."
  (define builder
    `(begin
       (use-modules ,@modules)
       (emacs-build #:name ,name
                    #:source ,(match (assoc-ref inputs "source")
                                (((? derivation? source))
                                 (derivation->output-path source))
                                ((source)
                                 source)
                                (source
                                 source))
                    #:system ,system
                    #:test-command ,test-command
                    #:tests? ,tests?
                    #:parallel-tests? ,parallel-tests?
                    #:phases ,phases
                    #:outputs %outputs
                    #:include ,include
                    #:exclude ,exclude
                    #:search-paths ',(map search-path-specification->sexp
                                          search-paths)
                    #:inputs %build-inputs)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:inputs inputs
                                #:system system
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define emacs-build-system
  (build-system
    (name 'emacs)
    (description "The build system for Emacs packages")
    (lower lower)))

;;; emacs.scm ends here


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; 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 (guix build-system font)
  #:use-module (guix utils)
  #:use-module (guix packages)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (ice-9 match)
  #:export (%font-build-system-modules
            font-build
            font-build-system))

;; Commentary:
;;
;; Standard build procedure for fonts.  This is implemented as an extension of
;; 'gnu-build-system'.
;;
;; Code:

(define %font-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build font-build-system)
    ,@%gnu-build-system-modules))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:target #:inputs #:native-inputs))

  (bag
    (name name)
    (system system)
    (host-inputs `(,@(if source
                         `(("source" ,source))
                         '())
                   ,@inputs
                   ,(list "tar" (module-ref (resolve-interface '(gnu packages base)) 'tar))
                   ,@(let ((compression (resolve-interface '(gnu packages compression))))
                       (map (match-lambda
                              ((name package)
                               (list name (module-ref compression package))))
                            `(("gzip" gzip)
                              ("bzip2" bzip2)
                              ("unzip" unzip)
                              ("xz" xz))))))
    (build-inputs native-inputs)
    (outputs outputs)
    (build font-build)
    (arguments (strip-keyword-arguments private-keywords arguments))))

(define* (font-build store name inputs
                     #:key source
                     (tests? #t)
                     (test-target "test")
                     (configure-flags ''())
                     (phases '(@ (guix build font-build-system)
                                 %standard-phases))
                     (outputs '("out"))
                     (search-paths '())
                     (system (%current-system))
                     (guile #f)
                     (imported-modules %font-build-system-modules)
                     (modules '((guix build font-build-system)
                                (guix build utils))))
  "Build SOURCE with INPUTS."
  (define builder
    `(begin
       (use-modules ,@modules)
       (font-build #:name ,name
                   #:source ,(match (assoc-ref inputs "source")
                               (((? derivation? source))
                                (derivation->output-path source))
                               ((source)
                                source)
                               (source
                                source))
                   #:configure-flags ,configure-flags
                   #:system ,system
                   #:test-target ,test-target
                   #:tests? ,tests?
                   #:phases ,phases
                   #:outputs %outputs
                   #:search-paths ',(map search-path-specification->sexp
                                         search-paths)
                   #:inputs %build-inputs)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:inputs inputs
                                #:system system
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define font-build-system
  (build-system
    (name 'font)
    (description "The build system for font packages")
    (lower lower)))

;;; font.scm ends here

repo_name: maximed/guix

license: mit


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013 Cyril Roelandt <tipecaml@gmail.com>
;;; Copyright © 2014 Federico Beffa <beffa@fbengineering.ch>
;;;
;;; 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 (guix build-system glib-or-gtk)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (guix packages)
  #:use-module (ice-9 match)
  #:export (%glib-or-gtk-build-system-modules
            glib-or-gtk-build
            glib-or-gtk-build-system))

;; Commentary:
;;
;; This build system is an extension of the 'gnu-build-system'.  It
;; accomodates the needs of applications making use of glib or gtk+ (with "or"
;; to be interpreted in the mathematical sense).  This is achieved by adding
;; two phases run after the 'install' phase:
;;
;; 'glib-or-gtk-wrap' phase:
;;
;; a) This phase looks for GSettings schemas, GIO modules and theming data.
;; If any of these is found in any input package, then all programs in
;; "out/bin" are wrapped in scripts defining the nedessary environment
;; variables.
;;
;; b) Looks for the existence of "libdir/gtk-3.0" directories in all input
;; packages.  If any is found, then the environment variable "GTK_PATH" is
;; suitably set and added to the wrappers.  The variable "GTK_PATH" has been
;; preferred over "GTK_EXE_PREFIX" because the latter can only point to a
;; single directory, while we may need to point to several ones.
;;
;; 'glib-or-gtk-compile-schemas' phase:
;;
;; Looks for the presence of "out/share/glib-2.0/schemas".  If that directory
;; exists and does not include a file named "gschemas.compiled", then
;; "glib-compile-schemas" is run in that directory.
;;
;; Code:

(define %default-modules
  ;; Build-side modules made available in the build environment.
  '((guix build glib-or-gtk-build-system)
    (guix build utils)))

(define %glib-or-gtk-build-system-modules
  ;; Build-side modules imported and used by default.
  `((guix build glib-or-gtk-build-system)
    ,@%gnu-build-system-modules))

(define (default-glib)
  "Return the default glib package from which we use
\"glib-compile-schemas\"."
  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages glib))))
    (module-ref module 'glib)))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (glib (default-glib))
                (implicit-inputs? #t)
                (strip-binaries? #t)
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:source #:target #:glib #:inputs #:native-inputs
      #:outputs #:implicit-inputs?))

  (and (not target)                               ;XXX: no cross-compilation
       (bag
         (name name)
         (system system)
         (host-inputs (if source
                          `(("source" ,source))
                          '()))
         (build-inputs `(,@native-inputs
                         ,@inputs
                         ("glib:bin" ,glib "bin") ; to compile schemas
                         ,@(if implicit-inputs?
                               (standard-packages)
                               '())))
         (outputs outputs)
         (build glib-or-gtk-build)
         (arguments (strip-keyword-arguments private-keywords arguments)))))

(define* (glib-or-gtk-build store name inputs
                            #:key (guile #f)
                            (outputs '("out"))
                            (search-paths '())
                            (configure-flags ''())
                            ;; Disable icon theme cache generation.
                            (make-flags ''("gtk_update_icon_cache=true"))
                            (out-of-source? #f)
                            (tests? #t)
                            (test-target "check")
                            (parallel-build? #t)
                            (parallel-tests? #t)
                            (validate-runpath? #t)
                            (patch-shebangs? #t)
                            (strip-binaries? #t)
                            (strip-flags ''("--strip-debug"))
                            (strip-directories ''("lib" "lib64" "libexec"
                                                  "bin" "sbin"))
                            (phases '(@ (guix build glib-or-gtk-build-system)
                                        %standard-phases))
                            (glib-or-gtk-wrap-excluded-outputs ''())
                            (system (%current-system))
                            (imported-modules %glib-or-gtk-build-system-modules)
                            (modules %default-modules)
                            allowed-references
                            disallowed-references)
  "Build SOURCE with INPUTS.  See GNU-BUILD for more details."
  (define canonicalize-reference
    (match-lambda
     ((? package? p)
      (derivation->output-path (package-derivation store p system)))
     (((? package? p) output)
      (derivation->output-path (package-derivation store p system)
                               output))
     ((? string? output)
      output)))

  (define builder
    `(begin
       (use-modules ,@modules)
       (glib-or-gtk-build #:source ,(match (assoc-ref inputs "source")
                                      (((? derivation? source))
                                       (derivation->output-path source))
                                      ((source)
                                       source)
                                      (source
                                       source))
                          #:system ,system
                          #:outputs %outputs
                          #:inputs %build-inputs
                          #:search-paths ',(map search-path-specification->sexp
                                                search-paths)
                          #:phases ,phases
                          #:glib-or-gtk-wrap-excluded-outputs
                           ,glib-or-gtk-wrap-excluded-outputs
                          #:configure-flags ,configure-flags
                          #:make-flags ,make-flags
                          #:out-of-source? ,out-of-source?
                          #:tests? ,tests?
                          #:test-target ,test-target
                          #:parallel-build? ,parallel-build?
                          #:parallel-tests? ,parallel-tests?
                          #:validate-runpath? ,validate-runpath?
                          #:patch-shebangs? ,patch-shebangs?
                          #:strip-binaries? ,strip-binaries?
                          #:strip-flags ,strip-flags
                          #:strip-directories ,strip-directories)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:system system
                                #:inputs inputs
                                #:modules imported-modules
                                #:outputs outputs
                                #:allowed-references
                                (and allowed-references
                                     (map canonicalize-reference
                                          allowed-references))
                                #:disallowed-references
                                (and disallowed-references
                                     (map canonicalize-reference
                                          disallowed-references))
                                #:guile-for-build guile-for-build))

(define glib-or-gtk-build-system
  (build-system
    (name 'glib-or-gtk)
    (description
     "The GNU Build System—i.e., ./configure && make && make install,
augmented with definition of suitable environment variables for glib and gtk+
in program wrappers.")
    (lower lower)))


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2019, 2020 Ludovic Courtès <ludo@gnu.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 (guix build-system gnu)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix memoization)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix packages)
  #:use-module (srfi srfi-1)
  #:use-module (ice-9 match)
  #:export (%gnu-build-system-modules
            gnu-build
            gnu-build-system
            standard-packages
            standard-cross-packages
            package-with-explicit-inputs
            package-with-extra-configure-variable
            static-libgcc-package
            static-package
            dist-package
            package-with-restricted-references))

;; Commentary:
;;
;; Standard build procedure for packages using the GNU Build System or
;; something compatible ("./configure && make && make install").
;;
;; Code:

(define %gnu-build-system-modules
  ;; Build-side modules imported and used by default.
  '((guix build gnu-build-system)
    (guix build utils)
    (guix build gremlin)
    (guix elf)))

(define %default-modules
  ;; Modules in scope in the build-side environment.
  '((guix build gnu-build-system)
    (guix build utils)))

(define* (package-with-explicit-inputs/deprecated p inputs
                                                  #:optional
                                                  (loc (current-source-location))
                                                  #:key (native-inputs '())
                                                  guile)
  "This variant is deprecated because it is inefficient: it memoizes only
temporarily instead of memoizing across all transformations where INPUTS is
the same.

Rewrite P, which is assumed to use GNU-BUILD-SYSTEM, to take INPUTS and
NATIVE-INPUTS as explicit inputs instead of the implicit default, and return
it.  INPUTS and NATIVE-INPUTS can be either input lists or thunks; in the
latter case, they will be called in a context where the `%current-system' and
`%current-target-system' are suitably parametrized.  Use GUILE to run the
builder, or the distro's final Guile when GUILE is #f."
  (define inputs* inputs)
  (define native-inputs* native-inputs)

  (define (call inputs)
    (if (procedure? inputs)
        (inputs)
        inputs))

  (define (duplicate-filter inputs)
    (let ((names (match (call inputs)
                   (((name _ ...) ...)
                    name))))
      (lambda (inputs)
        (fold alist-delete inputs names))))

  (let loop ((p p))
    (define rewritten-input
      (mlambda (input)
        (match input
          ((name (? package? p) sub-drv ...)
           ;; XXX: Check whether P's build system knows #:implicit-inputs, for
           ;; things like `cross-pkg-config'.
           (if (eq? (package-build-system p) gnu-build-system)
               (cons* name (loop p) sub-drv)
               (cons* name p sub-drv)))
          (x x))))

    (package (inherit p)
      (location (if (pair? loc) (source-properties->location loc) loc))
      (arguments
       ;; 'ensure-keyword-arguments' guarantees that this procedure is
       ;; idempotent.
       (ensure-keyword-arguments (package-arguments p)
                                 `(#:guile ,guile
                                   #:implicit-inputs? #f)))
      (replacement
       (let ((replacement (package-replacement p)))
         (and replacement
              (package-with-explicit-inputs replacement inputs loc
                                            #:native-inputs
                                            native-inputs
                                            #:guile guile))))
      (native-inputs
       (let ((filtered (duplicate-filter native-inputs*)))
        `(,@(call native-inputs*)
          ,@(map rewritten-input
                 (filtered (package-native-inputs p))))))
      (propagated-inputs
       (map rewritten-input
            (package-propagated-inputs p)))
      (inputs
       (let ((filtered (duplicate-filter inputs*)))
         `(,@(call inputs*)
           ,@(map rewritten-input
                  (filtered (package-inputs p)))))))))

(define* (package-with-explicit-inputs* inputs #:optional guile)
  "Return a procedure that rewrites the given package and all its dependencies
so that they use INPUTS (a thunk) instead of implicit inputs."
  (define (duplicate-filter package-inputs)
    (let ((names (match (inputs)
                   (((name _ ...) ...)
                    name))))
      (fold alist-delete package-inputs names)))

  (define (add-explicit-inputs p)
    (if (and (eq? (package-build-system p) gnu-build-system)
             (not (memq #:implicit-inputs? (package-arguments p))))
        (package
          (inherit p)
          (inputs (append (inputs)
                          (duplicate-filter (package-inputs p))))
          (arguments
           (ensure-keyword-arguments (package-arguments p)
                                     `(#:implicit-inputs? #f
                                       #:guile ,guile))))
        p))

  (define (cut? p)
    (or (not (eq? (package-build-system p) gnu-build-system))
        (memq #:implicit-inputs? (package-arguments p))))

  (package-mapping add-explicit-inputs cut?))

(define package-with-explicit-inputs
  (case-lambda*
   ((inputs #:optional guile)
    (package-with-explicit-inputs* inputs guile))
   ((p inputs #:optional (loc (current-source-location))
       #:key (native-inputs '()) guile)
    ;; deprecated
    (package-with-explicit-inputs/deprecated p inputs
                                             loc
                                             #:native-inputs
                                             native-inputs
                                             #:guile guile))))

(define (package-with-extra-configure-variable p variable value)
  "Return a version of P with VARIABLE=VALUE specified as an extra `configure'
flag, recursively.  An example is LDFLAGS=-static.  If P already has configure
flags for VARIABLE, the associated value is augmented."
  (let loop ((p p))
    (define (rewritten-inputs inputs)
      (map (match-lambda
            ((name (? package? p) sub ...)
             `(,name ,(loop p) ,@sub))
            (input input))
           inputs))

    (package (inherit p)
      (arguments
       (let ((args (package-arguments p)))
         (substitute-keyword-arguments args
           ((#:configure-flags flags)
            (let* ((var= (string-append variable "="))
                   (len  (string-length var=)))
              `(cons ,(string-append var= value)
                     (map (lambda (flag)
                            (if (string-prefix? ,var= flag)
                                (string-append
                                 ,(string-append var= value " ")
                                 (substring flag ,len))
                                flag))
                          ,flags)))))))
      (replacement
       (let ((replacement (package-replacement p)))
         (and replacement
              (package-with-extra-configure-variable replacement
                                                     variable value))))
      (inputs (rewritten-inputs (package-inputs p)))
      (propagated-inputs (rewritten-inputs (package-propagated-inputs p))))))

(define (static-libgcc-package p)
  "A version of P linked with `-static-gcc'."
  (package-with-extra-configure-variable p "LDFLAGS" "-static-libgcc"))

(define* (static-package p #:key (strip-all? #t))
  "Return a statically-linked version of package P.  If STRIP-ALL? is true,
use `--strip-all' as the arguments to `strip'."
  (package (inherit p)
    (arguments
     (let ((a (default-keyword-arguments (package-arguments p)
                '(#:configure-flags '()
                  #:strip-flags '("--strip-debug")))))
       (substitute-keyword-arguments a
         ((#:configure-flags flags)
          `(cons* "--disable-shared" "LDFLAGS=-static" ,flags))
         ((#:strip-flags flags)
          (if strip-all?
              ''("--strip-all")
              flags)))))
    (replacement (and=> (package-replacement p) static-package))))

(define* (dist-package p source #:key (phases '%dist-phases))
  "Return a package that runs takes source files from the SOURCE directory,
runs `make distcheck' and whose result is one or more source tarballs.  The
exact build phases are defined by PHASES."
  (let ((s source))
    (package (inherit p)
      (name (string-append (package-name p) "-dist"))
      (source s)
      (arguments
       ;; Use the right phases and modules.
       (substitute-keyword-arguments (package-arguments p)
         ((#:modules modules %default-modules)
          `((guix build gnu-dist)
            ,@modules))
         ((#:imported-modules modules %gnu-build-system-modules)
          `((guix build gnu-dist)
            ,@modules))
         ((#:phases _ #f)
          phases)))
      (native-inputs
       ;; Add autotools & co. as inputs.
       (let ((ref (lambda (module var)
                    (module-ref (resolve-interface module) var))))
         `(,@(package-native-inputs p)
           ("autoconf" ,(ref '(gnu packages autotools) 'autoconf-wrapper))
           ("automake" ,(ref '(gnu packages autotools) 'automake))
           ("libtool"  ,(ref '(gnu packages autotools) 'libtool))
           ("gettext"  ,(ref '(gnu packages gettext) 'gnu-gettext))
           ("texinfo"  ,(ref '(gnu packages texinfo) 'texinfo))))))))

(define (package-with-restricted-references p refs)
  "Return a package whose outputs are guaranteed to only refer to the packages
listed in REFS."
  (if (eq? (package-build-system p) gnu-build-system) ; XXX: dirty
      (package (inherit p)
        (arguments `(#:allowed-references ,refs
                     ,@(package-arguments p))))
      p))

(define (standard-packages)
  "Return the list of (NAME PACKAGE OUTPUT) or (NAME PACKAGE) tuples of
standard packages used as implicit inputs of the GNU build system."

  ;; Resolve (gnu packages commencement) lazily to hide circular dependency.
  (let ((distro (resolve-module '(gnu packages commencement))))
    (module-ref distro '%final-inputs)))

(define* (lower name
                #:key source inputs native-inputs outputs target
                (implicit-inputs? #t) (implicit-cross-inputs? #t)
                (strip-binaries? #t) system
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME from the given arguments."
  (define private-keywords
    `(#:source #:inputs #:native-inputs #:outputs
      #:implicit-inputs? #:implicit-cross-inputs?
      ,@(if target '() '(#:target))))

  (bag
    (name name)
    (system system) (target target)
    (build-inputs `(,@(if source
                          `(("source" ,source))
                          '())
                    ,@native-inputs

                    ;; When not cross-compiling, ensure implicit inputs come
                    ;; last.  That way, libc headers come last, which allows
                    ;; #include_next to work correctly; see
                    ;; <https://bugs.gnu.org/30756>.
                    ,@(if target '() inputs)
                    ,@(if (and target implicit-cross-inputs?)
                          (standard-cross-packages target 'host)
                          '())
                    ,@(if implicit-inputs?
                          (standard-packages)
                          '())))
    (host-inputs (if target inputs '()))

    ;; The cross-libc is really a target package, but for bootstrapping
    ;; reasons, we can't put it in 'host-inputs'.  Namely, 'cross-gcc' is a
    ;; native package, so it would end up using a "native" variant of
    ;; 'cross-libc' (built with 'gnu-build'), whereas all the other packages
    ;; would use a target variant (built with 'gnu-cross-build'.)
    (target-inputs (if (and target implicit-cross-inputs?)
                       (standard-cross-packages target 'target)
                       '()))
    (outputs (if strip-binaries?
                 outputs
                 (delete "debug" outputs)))
    (build (if target gnu-cross-build gnu-build))
    (arguments (strip-keyword-arguments private-keywords arguments))))

(define %license-file-regexp
  ;; Regexp matching license files.
  "^(COPYING.*|LICEN[CS]E.*|[Ll]icen[cs]e.*|Copy[Rr]ight(\\.(txt|md))?)$")

(define* (gnu-build store name input-drvs
                    #:key (guile #f)
                    (outputs '("out"))
                    (search-paths '())
                    (configure-flags ''())
                    (make-flags ''())
                    (out-of-source? #f)
                    (tests? #t)
                    (test-target "check")
                    (parallel-build? #t)
                    (parallel-tests? #t)
                    (patch-shebangs? #t)
                    (strip-binaries? #t)
                    (strip-flags ''("--strip-debug"
                                    "--enable-deterministic-archives"))
                    (strip-directories ''("lib" "lib64" "libexec"
                                          "bin" "sbin"))
                    (validate-runpath? #t)
                    (license-file-regexp %license-file-regexp)
                    (phases '%standard-phases)
                    (locale "en_US.utf8")
                    (system (%current-system))
                    (build (nix-system->gnu-triplet system))
                    (imported-modules %gnu-build-system-modules)
                    (modules %default-modules)
                    (substitutable? #t)
                    allowed-references
                    disallowed-references)
  "Return a derivation called NAME that builds from tarball SOURCE, with
input derivation INPUTS, using the usual procedure of the GNU Build
System.  The builder is run with GUILE, or with the distro's final Guile
package if GUILE is #f or omitted.

The builder is run in a context where MODULES are used; IMPORTED-MODULES
specifies modules not provided by Guile itself that must be imported in
the builder's environment, from the host.  Note that we distinguish
between both, because for Guile's own modules like (ice-9 foo), we want
to use GUILE's own version of it, rather than import the user's one,
which could lead to gratuitous input divergence.

SUBSTITUTABLE? determines whether users may be able to use substitutes of the
returned derivations, or whether they should always build it locally.

ALLOWED-REFERENCES can be either #f, or a list of packages that the outputs
are allowed to refer to.  Likewise for DISALLOWED-REFERENCES, which lists
packages that must not be referenced."
  (define canonicalize-reference
    (match-lambda
     ((? package? p)
      (derivation->output-path (package-derivation store p system
                                                   #:graft? #f)))
     (((? package? p) output)
      (derivation->output-path (package-derivation store p system
                                                   #:graft? #f)
                               output))
     ((? string? output)
      output)))

  (define builder
    `(begin
       (use-modules ,@modules)
       (gnu-build #:source ,(match (assoc-ref input-drvs "source")
                              (((? derivation? source))
                               (derivation->output-path source))
                              ((source)
                               source)
                              (source
                               source))
                  #:system ,system
                  #:build ,build
                  #:outputs %outputs
                  #:inputs %build-inputs
                  #:search-paths ',(map search-path-specification->sexp
                                        search-paths)
                  #:phases ,phases
                  #:locale ,locale
                  #:configure-flags ,configure-flags
                  #:make-flags ,make-flags
                  #:out-of-source? ,out-of-source?
                  #:tests? ,tests?
                  #:test-target ,test-target
                  #:parallel-build? ,parallel-build?
                  #:parallel-tests? ,parallel-tests?
                  #:patch-shebangs? ,patch-shebangs?
                  #:strip-binaries? ,strip-binaries?
                  #:validate-runpath? ,validate-runpath?
                  #:license-file-regexp ,license-file-regexp
                  #:strip-flags ,strip-flags
                  #:strip-directories ,strip-directories)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system
                             #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:system system
                                #:inputs input-drvs
                                #:outputs outputs
                                #:modules imported-modules
                                #:substitutable? substitutable?

                                #:allowed-references
                                (and allowed-references
                                     (map canonicalize-reference
                                          allowed-references))
                                #:disallowed-references
                                (and disallowed-references
                                     (map canonicalize-reference
                                          disallowed-references))
                                #:guile-for-build guile-for-build))

;;;
;;; Cross-compilation.
;;;

(define standard-cross-packages
  (mlambda (target kind)
    "Return the list of name/package tuples to cross-build for TARGET.  KIND
is one of `host' or `target'."
    (let* ((cross     (resolve-interface '(gnu packages cross-base)))
           (gcc       (module-ref cross 'cross-gcc))
           (binutils  (module-ref cross 'cross-binutils))
           (libc      (module-ref cross 'cross-libc)))
      (case kind
        ((host)
         ;; Cross-GCC appears once here, so that it's in $PATH...
         `(("cross-gcc" ,(gcc target
                              #:xbinutils (binutils target)
                              #:libc (libc target)))
           ("cross-binutils" ,(binutils target))))
        ((target)
         (let ((libc (libc target)))
           ;; ... and once here, so that libstdc++ & co. are in
           ;; CROSS_CPLUS_INCLUDE_PATH, etc.
           `(("cross-gcc" ,(gcc target
                                #:xbinutils (binutils target)
                                #:libc libc))
             ("cross-libc" ,libc)

             ;; MinGW's libc doesn't have a "static" output.
             ,@(if (member "static" (package-outputs libc))
                   `(("cross-libc:static" ,libc "static"))
                   '()))))))))

(define* (gnu-cross-build store name
                          #:key
                          target native-drvs target-drvs
                          (guile #f)
                          source
                          (outputs '("out"))
                          (search-paths '())
                          (native-search-paths '())

                          (configure-flags ''())
                          (make-flags ''())
                          (out-of-source? #f)
                          (tests? #f)             ; nothing can be done
                          (test-target "check")
                          (parallel-build? #t) (parallel-tests? #t)
                          (patch-shebangs? #t)
                          (strip-binaries? #t)
                          (strip-flags ''("--strip-debug"
                                          "--enable-deterministic-archives"))
                          (strip-directories ''("lib" "lib64" "libexec"
                                                "bin" "sbin"))
                          (validate-runpath? #t)
                          (license-file-regexp %license-file-regexp)
                          (phases '%standard-phases)
                          (locale "en_US.utf8")
                          (system (%current-system))
                          (build (nix-system->gnu-triplet system))
                          (imported-modules %gnu-build-system-modules)
                          (modules %default-modules)
                          (substitutable? #t)
                          allowed-references
                          disallowed-references)
  "Cross-build NAME for TARGET, where TARGET is a GNU triplet.  INPUTS are
cross-built inputs, and NATIVE-INPUTS are inputs that run on the build
platform."
  (define canonicalize-reference
    (match-lambda
     ((? package? p)
      (derivation->output-path (package-cross-derivation store p
                                                         target system)))
     (((? package? p) output)
      (derivation->output-path (package-cross-derivation store p
                                                         target system)
                               output))
     ((? string? output)
      output)))

  (define builder
    `(begin
       (use-modules ,@modules)

       (let ()
         (define %build-host-inputs
           ',(map (match-lambda
                   ((name (? derivation? drv) sub ...)
                    `(,name . ,(apply derivation->output-path drv sub)))
                   ((name path)
                    `(,name . ,path)))
                  native-drvs))

         (define %build-target-inputs
           ',(map (match-lambda
                   ((name (? derivation? drv) sub ...)
                    `(,name . ,(apply derivation->output-path drv sub)))
                   ((name (? package? pkg) sub ...)
                    (let ((drv (package-cross-derivation store pkg
                                                         target system)))
                      `(,name . ,(apply derivation->output-path drv sub))))
                   ((name path)
                    `(,name . ,path)))
                  target-drvs))

         (gnu-build #:source ,(match (assoc-ref native-drvs "source")
                                (((? derivation? source))
                                 (derivation->output-path source))
                                ((source)
                                 source)
                                (source
                                 source))
                    #:system ,system
                    #:build ,build
                    #:target ,target
                    #:outputs %outputs
                    #:inputs %build-target-inputs
                    #:native-inputs %build-host-inputs
                    #:search-paths ',(map search-path-specification->sexp
                                          search-paths)
                    #:native-search-paths ',(map
                                             search-path-specification->sexp
                                             native-search-paths)
                    #:phases ,phases
                    #:locale ,locale
                    #:configure-flags ,configure-flags
                    #:make-flags ,make-flags
                    #:out-of-source? ,out-of-source?
                    #:tests? ,tests?
                    #:test-target ,test-target
                    #:parallel-build? ,parallel-build?
                    #:parallel-tests? ,parallel-tests?
                    #:patch-shebangs? ,patch-shebangs?
                    #:strip-binaries? ,strip-binaries?
                    #:validate-runpath? ,validate-runpath?
                    #:license-file-regexp ,license-file-regexp
                    #:strip-flags ,strip-flags
                    #:strip-directories ,strip-directories))))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:system system
                                #:inputs (append native-drvs target-drvs)
                                #:outputs outputs
                                #:modules imported-modules
                                #:substitutable? substitutable?

                                #:allowed-references
                                (and allowed-references
                                     (map canonicalize-reference
                                          allowed-references))
                                #:disallowed-references
                                (and disallowed-references
                                     (map canonicalize-reference
                                          disallowed-references))
                                #:guile-for-build guile-for-build))

(define gnu-build-system
  (build-system
    (name 'gnu)
    (description
     "The GNU Build System—i.e., ./configure && make && make install")
    (lower lower)))


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Petter <petter@mykolab.ch>
;;; Copyright © 2017 Leo Famulari <leo@famulari.name>
;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
;;;
;;; 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 (guix build-system go)
  #:use-module (guix utils)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (guix packages)
  #:use-module (ice-9 match)
  #:use-module (ice-9 regex)
  #:export (%go-build-system-modules
            go-build
            go-build-system

            go-pseudo-version?
            go-version->git-ref))

;; Commentary:
;;
;; Standard build procedure for packages using the Go build system.  It is
;; implemented as an extension of 'gnu-build-system'.
;;
;; Code:

(define %go-pseudo-version-rx
  ;; Match only the end of the version string; this is so that matching the
  ;; more complex leading semantic version pattern is not required.
  (make-regexp (string-append
                "([0-9]{14}-)"                 ;timestamp
                "([0-9A-Fa-f]{12})"            ;commit hash
                "(\\+incompatible)?$")))       ;optional +incompatible tag

(define (go-version->git-ref version)
  "Parse VERSION, a \"pseudo-version\" as defined at
<https://golang.org/ref/mod#pseudo-versions>, and extract the commit hash from
it, defaulting to full VERSION (stripped from the \"+incompatible\" suffix if
present) if a pseudo-version pattern is not recognized."
  ;; A module version like v1.2.3 is introduced by tagging a revision in the
  ;; underlying source repository.  Untagged revisions can be referred to
  ;; using a "pseudo-version" like v0.0.0-yyyymmddhhmmss-abcdefabcdef, where
  ;; the time is the commit time in UTC and the final suffix is the prefix of
  ;; the commit hash (see: https://golang.org/ref/mod#pseudo-versions).
  (let* ((version
          ;; If a source code repository has a v2.0.0 or later tag for a file
          ;; tree with no go.mod, the version is considered to be part of the
          ;; v1 module's available versions and is given an +incompatible
          ;; suffix
          ;; (see:https://golang.org/cmd/go/#hdr-Module_compatibility_and_semantic_versioning).
          (if (string-suffix? "+incompatible" version)
              (string-drop-right version 13)
              version))
         (match (regexp-exec %go-pseudo-version-rx version)))
    (if match
        (match:substring match 2)
        version)))

(define (go-pseudo-version? version)
  "True if VERSION is a Go pseudo-version, i.e., a version string made of a
commit hash and its date rather than a proper release tag."
  (regexp-exec %go-pseudo-version-rx version))

(define %go-build-system-modules
  ;; Build-side modules imported and used by default.
  `((guix build go-build-system)
    (guix build union)
    ,@%gnu-build-system-modules))

(define (default-go)
  ;; Lazily resolve the binding to avoid a circular dependency.
  (let ((go (resolve-interface '(gnu packages golang))))
    (module-ref go 'go)))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (go (default-go))
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:source #:target #:go #:inputs #:native-inputs))

  (and (not target)                               ;XXX: no cross-compilation
       (bag
         (name name)
         (system system)
         (host-inputs `(,@(if source
                              `(("source" ,source))
                              '())
                        ,@inputs

                        ;; Keep the standard inputs of 'gnu-build-system'.
                        ,@(standard-packages)))
         (build-inputs `(("go" ,go)
                         ,@native-inputs))
         (outputs outputs)
         (build go-build)
         (arguments (strip-keyword-arguments private-keywords arguments)))))

(define* (go-build store name inputs
                   #:key
                   (phases '(@ (guix build go-build-system)
                               %standard-phases))
                   (outputs '("out"))
                   (search-paths '())
                   (install-source? #t)
                   (import-path "")
                   (unpack-path "")
                   (build-flags ''())
                   (tests? #t)
                   (allow-go-reference? #f)
                   (system (%current-system))
                   (guile #f)
                   (imported-modules %go-build-system-modules)
                   (modules '((guix build go-build-system)
                              (guix build union)
                              (guix build utils))))
  (define builder
   `(begin
      (use-modules ,@modules)
      (go-build #:name ,name
                #:source ,(match (assoc-ref inputs "source")
                                 (((? derivation? source))
                                  (derivation->output-path source))
                                 ((source)
                                  source)
                                 (source
                                  source))
                #:system ,system
                #:phases ,phases
                #:outputs %outputs
                #:search-paths ',(map search-path-specification->sexp
                                      search-paths)
                #:install-source? ,install-source?
                #:import-path ,import-path
                #:unpack-path ,unpack-path
                #:build-flags ,build-flags
                #:tests? ,tests?
                #:allow-go-reference? ,allow-go-reference?
                #:inputs %build-inputs)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system
                             #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:inputs inputs
                                #:system system
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define go-build-system
  (build-system
    (name 'go)
    (description
     "Build system for Go programs")
    (lower lower)))


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2019 Ludovic Courtès <ludo@gnu.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 (guix build-system guile)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix packages)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-26)
  #:export (%guile-build-system-modules
            guile-build-system))

(define %scheme-file-regexp
  ;; Regexp to match Scheme files.
  "\\.(scm|sls)$")

(define %guile-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build guile-build-system)
    ,@%gnu-build-system-modules))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (implicit-inputs? #t)
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."

  ;; Note: There's no #:guile argument (unlike, for instance,
  ;; 'ocaml-build-system' which has #:ocaml.)  This is so we can keep
  ;; procedures like 'package-for-guile-2.0' unchanged and simple.

  (define private-keywords
    '(#:target #:inputs #:native-inputs
      #:implicit-inputs?))

  (bag
    (name name)
    (system system) (target target)
    (host-inputs `(
                   ,@inputs))
    (build-inputs `(,@(if source
                          `(("source" ,source))
                          '())
                    ,@native-inputs
                    ,@(if implicit-inputs?
                          (map (cute assoc <> (standard-packages))
                               '("tar" "gzip" "bzip2" "xz" "locales"))
                          '())))
    (outputs outputs)
    (build (if target guile-cross-build guile-build))
    (arguments (strip-keyword-arguments private-keywords arguments))))

(define %compile-flags
  ;; Flags passed to 'guild compile' by default.  We choose a common
  ;; denominator between Guile 2.0 and 2.2.
  ''("-Wunbound-variable" "-Warity-mismatch" "-Wformat"))

(define* (guile-build store name inputs
                      #:key source
                      (guile #f)
                      (phases '%standard-phases)
                      (outputs '("out"))
                      (search-paths '())
                      (system (%current-system))
                      (source-directory ".")
                      not-compiled-file-regexp
                      (scheme-file-regexp %scheme-file-regexp)
                      (compile-flags %compile-flags)
                      (imported-modules %guile-build-system-modules)
                      (modules '((guix build guile-build-system)
                                 (guix build utils))))
  "Build SOURCE using Guile taken from the native inputs, and with INPUTS."
  (define builder
    `(begin
       (use-modules ,@modules)
       (guile-build #:name ,name
                    #:source ,(match (assoc-ref inputs "source")
                                (((? derivation? source))
                                 (derivation->output-path source))
                                ((source)
                                 source)
                                (source
                                 source))
                    #:source-directory ,source-directory
                    #:scheme-file-regexp ,scheme-file-regexp
                    #:not-compiled-file-regexp ,not-compiled-file-regexp
                    #:compile-flags ,compile-flags
                    #:phases ,phases
                    #:system ,system
                    #:outputs %outputs
                    #:search-paths ',(map search-path-specification->sexp
                                          search-paths)
                    #:inputs %build-inputs)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:inputs inputs
                                #:system system
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define* (guile-cross-build store name
                            #:key
                            (system (%current-system)) target
                            native-drvs target-drvs
                            (guile #f)
                            source
                            (outputs '("out"))
                            (search-paths '())
                            (native-search-paths '())

                            (phases '%standard-phases)
                            (source-directory ".")
                            not-compiled-file-regexp
                            (compile-flags %compile-flags)
                            (imported-modules %guile-build-system-modules)
                            (modules '((guix build guile-build-system)
                                       (guix build utils))))
  (define builder
    `(begin
       (use-modules ,@modules)

       (let ()
         (define %build-host-inputs
           ',(map (match-lambda
                    ((name (? derivation? drv) sub ...)
                     `(,name . ,(apply derivation->output-path drv sub)))
                    ((name path)
                     `(,name . ,path)))
                  native-drvs))

         (define %build-target-inputs
           ',(map (match-lambda
                    ((name (? derivation? drv) sub ...)
                     `(,name . ,(apply derivation->output-path drv sub)))
                    ((name (? package? pkg) sub ...)
                     (let ((drv (package-cross-derivation store pkg
                                                          target system)))
                       `(,name . ,(apply derivation->output-path drv sub))))
                    ((name path)
                     `(,name . ,path)))
                  target-drvs))

         (guile-build #:source ,(match (assoc-ref native-drvs "source")
                                  (((? derivation? source))
                                   (derivation->output-path source))
                                  ((source)
                                   source)
                                  (source
                                   source))
                      #:system ,system
                      #:target ,target
                      #:outputs %outputs
                      #:source-directory ,source-directory
                      #:not-compiled-file-regexp ,not-compiled-file-regexp
                      #:compile-flags ,compile-flags
                      #:inputs %build-target-inputs
                      #:native-inputs %build-host-inputs
                      #:search-paths ',(map search-path-specification->sexp
                                            search-paths)
                      #:native-search-paths ',(map
                                               search-path-specification->sexp
                                               native-search-paths)
                      #:phases ,phases))))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:system system
                                #:inputs (append native-drvs target-drvs)
                                #:outputs outputs
                                #:modules imported-modules
                                #:substitutable? substitutable?
                                #:guile-for-build guile-for-build))

(define guile-build-system
  (build-system
    (name 'guile)
    (description "The build system for simple Guile packages")
    (lower lower)))


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
;;; Copyright © 2020 Timothy Sample <samplet@ngyro.com>
;;; Copyright © 2020 Simon Tournier <zimon.toutoune@gmail.com>
;;;
;;; 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 (guix build-system haskell)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix packages)
  #:use-module (guix derivations)
  #:use-module (guix download)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:export (%haskell-build-system-modules
            haskell-build
            haskell-build-system))

;; Commentary:
;;
;; Standard build procedure for Haskell packages using 'Setup.hs'.  This is
;; implemented as an extension of 'gnu-build-system'.
;;
;; Code:

(define %haskell-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build haskell-build-system)
    ,@%gnu-build-system-modules))

(define (default-haskell)
  "Return the default Haskell package."
  ;; Lazily resolve the binding to avoid a circular dependency.
  (let ((haskell (resolve-interface '(gnu packages haskell))))
    (module-ref haskell 'ghc)))

(define (source-url->revision-url url revision)
  "Convert URL (a Hackage source URL) to the URL for the Cabal file at
version REVISION."
  (let* ((last-slash (string-rindex url #\/))
         (next-slash (string-rindex url #\/ 0 last-slash)))
    (string-append (substring url 0 next-slash)
                   (substring url last-slash (- (string-length url)
                                                (string-length ".tar.gz")))
                   "/revision/" revision ".cabal")))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (haskell (default-haskell))
                cabal-revision
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:target #:haskell #:cabal-revision #:inputs #:native-inputs #:outputs))

  (define (cabal-revision->origin cabal-revision)
    (match cabal-revision
      ((revision hash)
       (origin
         (method url-fetch)
         (uri (source-url->revision-url (origin-uri source) revision))
         (sha256 (base32 hash))
         (file-name (string-append name "-" revision ".cabal"))))
      (#f #f)))

  (and (not target)                               ;XXX: no cross-compilation
       (bag
         (name name)
         (system system)
         (host-inputs `(,@(if source
                              `(("source" ,source))
                              '())
                        ,@(match (cabal-revision->origin cabal-revision)
                            (#f '())
                            (revision `(("cabal-revision" ,revision))))
                        ,@inputs

                        ;; Keep the standard inputs of 'gnu-build-system'.
                        ,@(standard-packages)))
         (build-inputs `(("haskell" ,haskell)
                         ,@native-inputs))
         ;; XXX: this is a hack to get around issue #41569.
         (outputs (match outputs
                    (("out") (cons "static" outputs))
                    (_ outputs)))
         (build haskell-build)
         (arguments
          (substitute-keyword-arguments
              (strip-keyword-arguments private-keywords arguments)
            ((#:extra-directories extra-directories)
             `(list ,@(append-map
                       (lambda (name)
                         (match (assoc name inputs)
                           ((_ pkg)
                            (match (package-transitive-propagated-inputs pkg)
                              (((propagated-names . _) ...)
                               (cons name propagated-names))))))
                       extra-directories))))))))

(define* (haskell-build store name inputs
                        #:key source
                        (haddock? #t)
                        (haddock-flags ''())
                        (tests? #t)
                        (test-target "test")
                        ;; FIXME: Parallel builds lead to indeterministic
                        ;; results, see <http://issues.guix.gnu.org/43843#3>.
                        (parallel-build? #f)
                        (configure-flags ''())
                        (extra-directories ''())
                        (phases '(@ (guix build haskell-build-system)
                                    %standard-phases))
                        (outputs '("out" "static"))
                        (search-paths '())
                        (system (%current-system))
                        (guile #f)
                        (imported-modules %haskell-build-system-modules)
                        (modules '((guix build haskell-build-system)
                                   (guix build utils))))
  "Build SOURCE using HASKELL, and with INPUTS.  This assumes that SOURCE
provides a 'Setup.hs' file as its build system."
  (define builder
    `(begin
       (use-modules ,@modules)
       (haskell-build #:name ,name
                      #:source ,(match (assoc-ref inputs "source")
                                  (((? derivation? source))
                                   (derivation->output-path source))
                                  ((source)
                                   source)
                                  (source
                                   source))
                      #:cabal-revision ,(match (assoc-ref inputs
                                                          "cabal-revision")
                                          (((? derivation? revision))
                                           (derivation->output-path revision))
                                          (revision revision))
                      #:configure-flags ,configure-flags
                      #:extra-directories ,extra-directories
                      #:haddock-flags ,haddock-flags
                      #:system ,system
                      #:test-target ,test-target
                      #:tests? ,tests?
                      #:parallel-build? ,parallel-build?
                      #:haddock? ,haddock?
                      #:phases ,phases
                      #:outputs %outputs
                      #:search-paths ',(map search-path-specification->sexp
                                            search-paths)
                      #:inputs %build-inputs)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:inputs inputs
                                #:system system
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define haskell-build-system
  (build-system
    (name 'haskell)
    (description "The standard Haskell build system")
    (lower lower)))

;;; haskell.scm ends here


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Nicolò Balzarotti <nicolo@nixo.xyz>
;;;
;;; 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 (guix build-system julia)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix packages)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-26)
  #:export (%julia-build-system-modules
            julia-build
            julia-build-system))

;; Commentary:
;;
;; Standard build procedure for Julia packages.
;;
;; Code:

(define %julia-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build julia-build-system)
    ,@%gnu-build-system-modules))

(define (default-julia)
  "Return the default Julia package."
  ;; Lazily resolve the binding to avoid a circular dependency.
  (let ((julia-mod (resolve-interface '(gnu packages julia))))
    (module-ref julia-mod 'julia)))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (julia (default-julia))
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:target #:julia #:inputs #:native-inputs))

  (and (not target)                        ;XXX: no cross-compilation
       (bag
         (name name)
         (system system)
         (host-inputs `(,@(if source
                              `(("source" ,source))
                              '())
                        ,@inputs

                        ;; Keep the standard inputs of 'gnu-build-system'.
                        ,@(standard-packages)))
         (build-inputs `(("julia" ,julia)
                         ,@native-inputs))
         (outputs outputs)
         (build julia-build)
         (arguments (strip-keyword-arguments private-keywords arguments)))))

(define* (julia-build store name inputs
                      #:key source
                      (tests? #t)
                      (phases '(@ (guix build julia-build-system)
                                  %standard-phases))
                      (outputs '("out"))
                      (search-paths '())
                      (system (%current-system))
                      (guile #f)
                      (julia-package-name #f)
                      (imported-modules %julia-build-system-modules)
                      (modules '((guix build julia-build-system)
                                 (guix build utils))))
  "Build SOURCE using Julia, and with INPUTS."
  (define builder
    `(begin
       (use-modules ,@modules)
       (julia-build #:name ,name
                    #:source ,(match (assoc-ref inputs "source")
                                (((? derivation? source))
                                 (derivation->output-path source))
                                ((source)
                                 source)
                                (source
                                 source))
                    #:system ,system
                    #:tests? ,tests?
                    #:phases ,phases
                    #:outputs %outputs
                    #:search-paths ',(map search-path-specification->sexp
                                          search-paths)
                    #:inputs %build-inputs
                    #:julia-package-name ,julia-package-name)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:inputs inputs
                                #:system system
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define julia-build-system
  (build-system
   (name 'julia)
   (description "The build system for Julia packages")
   (lower lower)))

;;; julia.scm ends here


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Danny Milosavljevic <dannym@scratchpost.org>
;;; Copyright © 2020 Mathieu Othacehe <m.othacehe@gmail.com>
;;;
;;; 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 (guix build-system linux-module)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (guix packages)
  #:use-module (ice-9 match)
  #:export (%linux-module-build-system-modules
            linux-module-build
            linux-module-build-system))

;; Commentary:
;;
;; Code:

(define %linux-module-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build linux-module-build-system)
    ,@%gnu-build-system-modules))

(define (default-linux)
  "Return the default Linux package."

  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages linux))))
    (module-ref module 'linux-libre)))

(define (system->arch system)
  (let ((module (resolve-interface '(gnu packages linux))))
    ((module-ref module 'system->linux-architecture) system)))

(define (make-linux-module-builder linux)
  (package
    (inherit linux)
    (name (string-append (package-name linux) "-module-builder"))
    (inputs
     `(("linux" ,linux)))
    (arguments
     (substitute-keyword-arguments (package-arguments linux)
      ((#:phases phases)
       `(modify-phases ,phases
          (replace 'build
            (lambda _
              (invoke "make" "modules_prepare")))
          (delete 'strip) ; faster.
          (replace 'install
            (lambda* (#:key inputs outputs #:allow-other-keys)
              (let* ((out (assoc-ref outputs "out"))
                     (out-lib-build (string-append out "/lib/modules/build")))
                ;; Delete some huge items that we probably don't need.
                ;; TODO: Only preserve the minimum, i.e. [Kbuild], Kconfig,
                ;; scripts, include, ".config".
                (copy-recursively "." out-lib-build)
                (for-each (lambda (name)
                            (when (file-exists? name)
                            (delete-file-recursively name)))
                 (map (lambda (name)
                        (string-append out-lib-build "/" name))
                  '("arch" ; 137 MB
                    ;"tools" ; 44 MB ; Note: is built by our 'build phase.
                    "tools/testing" ; 14 MB
                    "tools/perf" ; 17 MB
                    "drivers" ; 600 MB
                    "Documentation" ; 52 MB
                    "fs" ; 43 MB
                    "net" ; 33 MB
                    "samples" ; 2 MB
                    "sound"))) ; 40 MB
                ;; Reinstate arch/**/dts since "scripts/dtc" depends on it.
                ;; Reinstate arch/**/include directories.
                ;; Reinstate arch/**/Makefile.
                ;; Reinstate arch/**/module.lds.
                (for-each
                 (lambda (name)
                   (mkdir-p (dirname (string-append out-lib-build "/" name)))
                   (copy-recursively name
                                     (string-append out-lib-build "/" name)))
                 (append (find-files "arch" "^(dts|include)$" #:directories? #t)
                         (find-files "arch" "^(Makefile|module.lds)$")))
                (let* ((linux (assoc-ref inputs "linux")))
                  (install-file (string-append linux "/System.map")
                                out-lib-build)
                  (let ((source (string-append linux "/Module.symvers")))
                    (when (file-exists? source)
                        (install-file source out-lib-build))))
                #t)))))))))

(define* (lower name
                #:key source inputs native-inputs outputs
                system target
                (linux (default-linux))
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    `(#:source #:target #:gcc #:kmod #:linux #:inputs #:native-inputs
      ,@(if target '() '(#:target))))

  (bag
    (name name)
    (system system) (target target)
    (build-inputs `(,@(if source
                          `(("source" ,source))
                          '())
                    ,@native-inputs
                    ;; TODO: Remove "gmp", "mpfr", "mpc" since they are
                    ;; only needed to compile the gcc plugins.  Maybe
                    ;; remove "flex", "bison", "elfutils", "perl",
                    ;; "openssl".  That leaves very little ("bc", "gcc",
                    ;; "kmod").
                    ,@(package-native-inputs linux)
                    ,@(if target
                          ;; Use the standard cross inputs of
                          ;; 'gnu-build-system'.
                          (standard-cross-packages target 'host)
                          '())
                    ;; Keep the standard inputs of 'gnu-build-system'.
                    ,@(standard-packages)))
    (host-inputs `(,@inputs
                   ("linux" ,linux)
                   ("linux-module-builder"
                    ,(make-linux-module-builder linux))))
    (target-inputs (if target
                       (standard-cross-packages target 'target)
                       '()))
    (outputs outputs)
    (build (if target linux-module-build-cross linux-module-build))
    (arguments (strip-keyword-arguments private-keywords arguments))))

(define* (linux-module-build store name inputs
                             #:key
                             target
                             (search-paths '())
                             (tests? #t)
                             (phases '(@ (guix build linux-module-build-system)
                                         %standard-phases))
                             (outputs '("out"))
                             (make-flags ''())
                             (system (%current-system))
                             (guile #f)
                             (substitutable? #t)
                             (imported-modules
                              %linux-module-build-system-modules)
                             (modules '((guix build linux-module-build-system)
                                        (guix build utils))))
  "Build SOURCE using LINUX, and with INPUTS."
  (define builder
    `(begin
       (use-modules ,@modules)
       (linux-module-build #:name ,name
                     #:source ,(match (assoc-ref inputs "source")
                                      (((? derivation? source))
                                       (derivation->output-path source))
                                      ((source)
                                       source)
                                      (source
                                        source))
                     #:search-paths ',(map search-path-specification->sexp
                                           search-paths)
                     #:phases ,phases
                     #:system ,system
                     #:target ,target
                     #:arch ,(system->arch (or target system))
                     #:tests? ,tests?
                     #:outputs %outputs
                     #:make-flags ,make-flags
                     #:inputs %build-inputs)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:system system
                                #:inputs inputs
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build
                                #:substitutable? substitutable?))

(define* (linux-module-build-cross
          store name
          #:key
          target native-drvs target-drvs
          (guile #f)
          (outputs '("out"))
          (make-flags ''())
          (search-paths '())
          (native-search-paths '())
          (tests? #f)
          (phases '(@ (guix build linux-module-build-system)
                      %standard-phases))
          (system (%current-system))
          (substitutable? #t)
          (imported-modules
           %linux-module-build-system-modules)
          (modules '((guix build linux-module-build-system)
                     (guix build utils))))
  (define builder
    `(begin
       (use-modules ,@modules)
       (let ()
         (define %build-host-inputs
           ',(map (match-lambda
                    ((name (? derivation? drv) sub ...)
                     `(,name . ,(apply derivation->output-path drv sub)))
                    ((name path)
                     `(,name . ,path)))
                  native-drvs))

         (define %build-target-inputs
           ',(map (match-lambda
                    ((name (? derivation? drv) sub ...)
                     `(,name . ,(apply derivation->output-path drv sub)))
                    ((name (? package? pkg) sub ...)
                     (let ((drv (package-cross-derivation store pkg
                                                          target system)))
                       `(,name . ,(apply derivation->output-path drv sub))))
                    ((name path)
                     `(,name . ,path)))
                  target-drvs))

         (linux-module-build #:name ,name
                             #:source ,(match (assoc-ref native-drvs "source")
                                         (((? derivation? source))
                                          (derivation->output-path source))
                                         ((source)
                                          source)
                                         (source
                                          source))
                             #:system ,system
                             #:target ,target
                             #:arch ,(system->arch (or target system))
                             #:outputs %outputs
                             #:make-flags ,make-flags
                             #:inputs %build-target-inputs
                             #:native-inputs %build-host-inputs
                             #:search-paths
                             ',(map search-path-specification->sexp
                                    search-paths)
                             #:native-search-paths
                             ',(map
                                search-path-specification->sexp
                                native-search-paths)
                             #:phases ,phases
                             #:tests? ,tests?))))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:system system
                                #:inputs (append native-drvs target-drvs)
                                #:outputs outputs
                                #:modules imported-modules
                                #:guile-for-build guile-for-build
                                #:substitutable? substitutable?))

(define linux-module-build-system
  (build-system
    (name 'linux-module)
    (description "The Linux module build system")
    (lower lower)))

;;; linux-module.scm ends here


code:
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 Julien Lepiller <julien@lepiller.eu>
;;;
;;; 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 (guix build-system maven)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix derivations)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (guix packages)
  #:use-module (ice-9 match)
  #:use-module (srfi srfi-1)
  #:export (%maven-build-system-modules
            default-maven
            default-maven-plugins
            %default-exclude
            lower
            maven-build
            maven-build-system))

;; Commentary:
;;
;; Standard build procedure for Maven packages.  This is implemented as an
;; extension of `gnu-build-system'.
;;
;; Code:

(define %maven-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build maven-build-system)
    (guix build maven pom)
    ,@%gnu-build-system-modules))

(define (default-maven)
  "Return the default maven package."

  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages maven))))
    (module-ref module 'maven)))

(define (default-maven-compiler-plugin)
  "Return the default maven compiler plugin package."
  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages maven))))
    (module-ref module 'maven-compiler-plugin)))

(define (default-maven-jar-plugin)
  "Return the default maven jar plugin package."
  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages maven))))
    (module-ref module 'maven-jar-plugin)))

(define (default-maven-resources-plugin)
  "Return the default maven resources plugin package."
  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages maven))))
    (module-ref module 'maven-resources-plugin)))

(define (default-maven-surefire-plugin)
  "Return the default maven surefire plugin package."
  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages maven))))
    (module-ref module 'maven-surefire-plugin)))

(define (default-java-surefire-junit4)
  "Return the default surefire junit4 provider package."
  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages maven))))
    (module-ref module 'java-surefire-junit4)))

(define (default-maven-install-plugin)
  "Return the default maven install plugin package."
  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages maven))))
    (module-ref module 'maven-install-plugin)))

(define (default-jdk)
  "Return the default JDK package."
  ;; Lazily resolve the binding to avoid a circular dependency.
  (let ((jdk-mod (resolve-interface '(gnu packages java))))
    (module-ref jdk-mod 'icedtea)))

(define (default-maven-plugins)
  `(("maven-compiler-plugin" ,(default-maven-compiler-plugin))
    ("maven-jar-plugin" ,(default-maven-jar-plugin))
    ("maven-resources-plugin" ,(default-maven-resources-plugin))
    ("maven-surefire-plugin" ,(default-maven-surefire-plugin))
    ("java-surefire-junit4" ,(default-java-surefire-junit4))
    ("maven-install-plugin" ,(default-maven-install-plugin))))

(define %default-exclude
  `(("org.apache.maven.plugins" .
      ("maven-release-plugin" "maven-site-plugin"))))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (maven (default-maven))
                (jdk (default-jdk))
                (maven-plugins (default-maven-plugins))
                (local-packages '())
                (exclude %default-exclude)
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:source #:target #:jdk #:maven #:maven-plugins #:inputs #:native-inputs))

  (and (not target)                               ;XXX: no cross-compilation
       (bag
         (name name)
         (system system)
         (host-inputs `(,@(if source
                              `(("source" ,source))
                              '())
                        ,@inputs

                        ;; Keep the standard inputs of 'gnu-build-system'.
                        ,@(standard-packages)))
         (build-inputs `(("maven" ,maven)
                         ("jdk" ,jdk "jdk")
                         ,@maven-plugins
                         ,@native-inputs))
         (outputs outputs)
         (build maven-build)
         (arguments (strip-keyword-arguments private-keywords arguments)))))

(define* (maven-build store name inputs
                       #:key (guile #f)
                       (outputs '("out"))
                       (search-paths '())
                       (out-of-source? #t)
                       (validate-runpath? #t)
                       (patch-shebangs? #t)
                       (strip-binaries? #t)
                       (exclude %default-exclude)
                       (local-packages '())
                       (tests? #t)
                       (strip-flags ''("--strip-debug"))
                       (strip-directories ''("lib" "lib64" "libexec"
                                             "bin" "sbin"))
                       (phases '(@ (guix build maven-build-system)
                                   %standard-phases))
                       (system (%current-system))
                       (imported-modules %maven-build-system-modules)
                       (modules '((guix build maven-build-system)
                                  (guix build maven pom)
                                  (guix build utils))))
  "Build SOURCE using PATCHELF, and with INPUTS. This assumes that SOURCE
provides its own binaries."
  (define builder
    `(begin
       (use-modules ,@modules)
       (maven-build #:source ,(match (assoc-ref inputs "source")
                                 (((? derivation? source))
                                  (derivation->output-path source))
                                 ((source)
                                  source)
                                 (source
                                  source))
                     #:system ,system
                     #:outputs %outputs
                     #:inputs %build-inputs
                     #:search-paths ',(map search-path-specification->sexp
                                           search-paths)
                     #:phases ,phases
                     #:exclude (quote ,exclude)
                     #:local-packages (quote ,local-packages)
                     #:tests? ,tests?
                     #:out-of-source? ,out-of-source?
                     #:validate-runpath? ,validate-runpath?
                     #:patch-shebangs? ,patch-shebangs?
                     #:strip-binaries? ,strip-binaries?
                     #:strip-flags ,strip-flags
                     #:strip-directories ,strip-directories)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:system system
                                #:inputs inputs
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define maven-build-system
  (build-system
    (name 'maven)
    (description "The standard Maven build system")
    (lower lower)))

;;; maven.scm ends here