gnu: Add ninja.

* gnu/packages/ninja.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

gnu-system.am

@@ -191,6 +191,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/ncurses.scm			\
   gnu/packages/netpbm.scm			\
   gnu/packages/nettle.scm			\
+  gnu/packages/ninja.scm			\
   gnu/packages/node.scm				\
   gnu/packages/noweb.scm			\
   gnu/packages/ntp.scm				\

gnu/packages/ninja.scm

@@ -0,0 +1,87 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Sou Bunnbu <iyzsong@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 (gnu packages ninja)
+  #:use-module ((guix licenses) #:select (asl2.0))
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages python))
+
+(define-public ninja
+  (package
+    (name "ninja")
+    (version "1.5.3")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://github.com/martine/ninja/"
+                                  "archive/v" version ".tar.gz"))
+              (sha256
+               (base32
+                "1h3yfwcfl61v493vna6jia2fizh8rpig7qw2504cvkr6gid3p5bw"))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:phases
+       (alist-replace
+        'configure
+        (lambda _
+          (substitute* "src/subprocess-posix.cc"
+            (("/bin/sh") (which "sh"))))
+        (alist-replace
+         'build
+         (lambda _
+           (zero? (system* "./configure.py" "--bootstrap")))
+         (alist-replace
+          'check
+          (lambda _
+            (and (zero? (system* "./configure.py"))
+                 (zero? (system* "./ninja" "ninja_test"))
+                 ;; SubprocessTest.SetWithLots fails with:
+                 ;;   Raise [ulimit -n] well above 1025 to make this test go.
+                 ;; Skip it.
+                 ;;
+                 ;; SubprocessTest.InterruptChild fails when using 'system*':
+                 ;;   *** Failure in src/subprocess_test.cc:83
+                 ;;   ExitInterrupted == subproc->Finish()
+                 ;; Pass it by using 'system' instead of 'system*'.
+                 (zero? (system (string-append
+                                 "./ninja_test "
+                                 "--gtest_filter="
+                                 "-SubprocessTest.SetWithLots")))))
+          (alist-replace
+           'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (bin (string-append out "/bin"))
+                    (doc (string-append out "/share/doc/ninja")))
+               (mkdir-p bin)
+               (copy-file "ninja" (string-append bin "/ninja"))
+               (mkdir-p doc)
+               (copy-file "doc/manual.asciidoc"
+                          (string-append doc "/manual.asciidoc"))))
+           %standard-phases))))))
+    (native-inputs `(("python" ,python-2)))
+    (home-page "http://martine.github.io/ninja/")
+    (synopsis "Small build system")
+    (description
+     "Ninja is a small build system with a focus on speed.  It differs from
+other build systems in two major respects: it is designed to have its input
+files generated by a higher-level build system, and it is designed to run
+builds as fast as possible.")
+    (license asl2.0)))