gnu: Add composer-classloader.

* gnu/packages/php-xyz.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.

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

gnu/local.mk

@@ -508,6 +508,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/photo.scm			\
   %D%/packages/phabricator.scm 			\
   %D%/packages/php.scm				\
+  %D%/packages/php-xyz.scm			\
   %D%/packages/piet.scm			\
   %D%/packages/pikchr.scm			\
   %D%/packages/pkg-config.scm			\

gnu/packages/php-xyz.scm

@@ -0,0 +1,60 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2019 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 (gnu packages php-xyz)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages php)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system composer)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix utils)
+  #:use-module ((guix licenses) #:prefix license:))
+
+(define-public composer-classloader
+  (package
+    (name "composer-classloader")
+    (version "1.9.0")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/composer/composer")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0127zmmg3yx84ljngfs86q7kjhyypybkf4d1ihfrfnzgynzxfxdf"))))
+    (build-system gnu-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (delete 'configure)
+         (delete 'build)
+         (delete 'check)
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out")))
+               (install-file "src/Composer/Autoload/ClassLoader.php"
+                             (string-append out "/share/web/composer/"))))))))
+    (home-page "https://getcomposer.org")
+    (synopsis "PHP class loader extracted from the composer package")
+    (description "This package contains the class loader class used by Composer to
+build its autoloading feature.  This package is used by the composer-build-system
+to build its own store-aware autoloading feature.")
+    (license license:expat)))