build-system: Add 'meson-build-system'.

* Makefile.am (MODULES): Add 'guix/build-system/meson.scm' and
'guix/build/meson-build-system.scm'.
* guix/build-system/meson.scm: New file.
* guix/build/meson-build-system.scm: New file.
* doc/guix.texi (Build Systems): Add 'meson-build-system'.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

1 files changed, 178 insertions, 0 deletions

diff --git a/guix/build-system/meson.scm b/guix/build-system/meson.scm
new file mode 100644
index 0000000000..d66ec760a4
--- /dev/null
+++ b/guix/build-system/meson.scm
@@ -0,0 +1,178 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2017 Peter Mikkelsen <petermikkelsen10@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 meson)
+  #: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 build-system glib-or-gtk)
+  #:use-module (guix packages)
+  #:use-module (ice-9 match)
+  #:export (%meson-build-system-modules
+            meson-build-system))
+
+;; Commentary:
+;;
+;; Standard build procedure for packages using Meson. This is implemented as an
+;; extension of `gnu-build-system', with the option to turn on the glib/gtk
+;; phases from `glib-or-gtk-build-system'.
+;;
+;; Code:
+
+(define %meson-build-system-modules
+  ;; Build-side modules imported by default.
+  `((guix build meson-build-system)
+    (guix build rpath)
+    ;; The modules from glib-or-gtk contains the modules from gnu-build-system,
+    ;; so there is no need to import that too.
+    ,@%glib-or-gtk-build-system-modules))
+
+(define (default-ninja)
+  "Return the default ninja package."
+  ;; Lazily resolve the binding to avoid a circular dependency.
+  (let ((module (resolve-interface '(gnu packages ninja))))
+    (module-ref module 'ninja)))
+
+(define (default-meson)
+  "Return the default meson package."
+  ;; Lazily resolve the binding to avoid a circular dependency.
+  (let ((module (resolve-interface '(gnu packages build-tools))))
+    (module-ref module 'meson-for-build)))
+
+(define (default-patchelf)
+  "Return the default patchelf package."
+  ;; Lazily resolve the binding to avoid a circular dependency.
+  (let ((module (resolve-interface '(gnu packages elf))))
+    (module-ref module 'patchelf)))
+
+(define* (lower name
+                #:key source inputs native-inputs outputs system target
+                (meson (default-meson))
+                (ninja (default-ninja))
+                (glib-or-gtk #f)
+                #:allow-other-keys
+                #:rest arguments)
+  "Return a bag for NAME."
+  (define private-keywords
+    `(#:source #:meson #:ninja #:inputs #:native-inputs #:outputs #:target))
+
+  (and (not target) ;; TODO: add support for cross-compilation.
+       (bag
+         (name name)
+         (system system)
+         (build-inputs `(("meson" ,meson)
+                         ("ninja" ,ninja)
+                         ;; Add patchelf for (guix build rpath) to work.
+                         ("patchelf" ,(default-patchelf))
+                         ,@native-inputs))
+         (host-inputs `(,@(if source
+                              `(("source" ,source))
+                              '())
+                        ,@inputs
+                        ;; Keep the standard inputs of 'gnu-build-system'.
+                        ,@(standard-packages)))
+         (outputs outputs)
+         (build meson-build)
+         (arguments (strip-keyword-arguments private-keywords arguments)))))
+
+(define* (meson-build store name inputs
+                      #:key (guile #f)
+                      (outputs '("out"))
+                      (configure-flags ''())
+                      (search-paths '())
+                      (build-type "plain")
+                      (tests? #t)
+                      (test-target "test")
+                      (glib-or-gtk? #f)
+                      (parallel-build? #t)
+                      (parallel-tests? #f)
+                      (validate-runpath? #t)
+                      (patch-shebangs? #t)
+                      (strip-binaries? #t)
+                      (strip-flags ''("--strip-debug"))
+                      (strip-directories ''("lib" "lib64" "libexec"
+                                            "bin" "sbin"))
+                      (elf-directories ''("lib" "lib64" "libexec"
+                                          "bin" "sbin"))
+                      (phases '(@ (guix build meson-build-system)
+                                  %standard-phases))
+                      (system (%current-system))
+                      (imported-modules %meson-build-system-modules)
+                      (modules '((guix build meson-build-system)
+                                 (guix build utils))))
+  "Build SOURCE using MESON, and with INPUTS, assuming that SOURCE
+has a 'meson.build' file."
+  (define builder
+    `(let ((build-phases (if ,glib-or-gtk?
+                             ,phases
+                             (modify-phases ,phases
+                               (delete 'glib-or-gtk-compile-schemas)
+                               (delete 'glib-or-gtk-wrap)))))
+       (use-modules ,@modules)
+       (meson-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 build-phases
+                    #:configure-flags ,configure-flags
+                    #:build-type ,build-type
+                    #: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
+                    #:elf-directories ,elf-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 meson-build-system
+  (build-system
+    (name 'meson)
+    (description "The standard Meson build system")
+    (lower lower)))
+
+;;; meson.scm ends here