gnu: openclonk: Use gexps and new input style.

* gnu/packages/games.scm (openclonk)[arguments]: Use gexps.
[source]: Reindent.
[inputs, native-inputs]: Drop labels.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu/packages/games.scm

@@ -9377,7 +9377,8 @@ (define-public openclonk
   (package
     (name "openclonk")
     (version "8.1")
-    (source (origin
+    (source
+     (origin
        (method url-fetch)
        (uri (string-append
              "https://www.openclonk.org/builds/release/" version "/"
@@ -9412,29 +9413,32 @@ (define-public openclonk
                "#include <sort.h>"))))))
     (build-system cmake-build-system)
     (arguments
-     `(#:configure-flags '("-DAudio_TK=OpenAL")
+     (list
+      #:configure-flags
+      #~(list "-DAudio_TK=OpenAL")
       #:test-target "tests"
       #:phases
-       (modify-phases %standard-phases
+      #~(modify-phases %standard-phases
           (add-after 'unpack 'prepare-gmock
             (lambda* (#:key inputs #:allow-other-keys)
+              (let ((gmock (search-input-directory inputs "/googlemock"))
+                    (gtest (search-input-directory inputs "/googletest")))
                 (mkdir "gmock")
-             (copy-recursively (assoc-ref inputs "googlemock") "gmock")
+                (copy-recursively gmock "gmock/googlemock")
+                (copy-recursively gtest "gmock/googletest")
                 (substitute* "tests/CMakeLists.txt"
                   (("/usr/src/gmock")
                    (string-append (getcwd) "/gmock/googlemock"))
                   (("/usr/src/gtest")
                    (string-append (getcwd) "/gmock/googletest"))
                   (("PATH_SUFFIXES \"src\" \"gtest\"")
-                "PATH_SUFFIXES \"src\""))
+                   "PATH_SUFFIXES \"src\"")))))
-             #t))
           (add-after 'prepare-gmock 'lax-freealut-requirement
             ;; TODO: We provide freealut 1.1.0, but pkg-config somehow detects
             ;; it as 1.0.1.  Force minimal version.
             (lambda _
               (substitute* "cmake/FindAudio.cmake"
-               (("freealut>=1.1.0") "freealut>=1.0.1"))
+                (("freealut>=1.1.0") "freealut>=1.0.1"))))
-             #t))
           (add-after 'lax-freealut-requirement 'fix-directories
             ;; Prefer "$out/share/openclonk" over
             ;; "$out/share/games/openclonk". Also install "openclonk"
@@ -9443,31 +9447,30 @@ (define-public openclonk
               (substitute* "CMakeLists.txt"
                 (("share/games/openclonk") "share/openclonk")
                 (("TARGETS openclonk DESTINATION games")
-                "TARGETS openclonk DESTINATION bin"))
+                 "TARGETS openclonk DESTINATION bin")))))))
-             #t)))))
     (native-inputs
-     `(("googlemock" ,(package-source googletest))
+     (list (package-source googletest)
-       ("googletest" ,googletest)
+           googletest
-       ("pkg-config" ,pkg-config)))
+           pkg-config))
     (inputs
-     `(("c-template-sort" ,c-template-sort)
+     (list c-template-sort
-       ("freealut" ,freealut)
+           freealut
-       ("freetype" ,freetype)
+           freetype
-       ("glew" ,glew)
+           glew
-       ("libb2" ,libb2)
+           libb2
-       ("libjpeg" ,libjpeg-turbo)
+           libjpeg-turbo
-       ("libogg" ,libogg)
+           libogg
-       ("libpng" ,libpng)
+           libpng
-       ("libvorbis" ,libvorbis)
+           libvorbis
-       ("libxrandr" ,libxrandr)
+           libxrandr
-       ("mesa" ,mesa)
+           mesa
-       ("miniupnpc" ,miniupnpc)
+           miniupnpc
-       ("openal" ,openal)
+           openal
-       ("pcg-cpp" ,pcg-cpp)
+           pcg-cpp
-       ("qtbase" ,qtbase-5)
+           qtbase-5
-       ("readline" ,readline)
+           readline
-       ("sdl" ,sdl2)
+           sdl2
-       ("tinyxml" ,tinyxml)))
+           tinyxml))
     (home-page "https://www.openclonk.org/")
     (synopsis
      "Multiplayer action game where you control small and nimble humanoids")