Cleanup of Apple OpenGL shim packages (#44269)

- Remove duplicated code
- Use BundlePackage as a base class

var/spack/repos/builtin/packages/apple-gl/package.py

@@ -2,34 +2,14 @@
 # Spack Project Developers. See the top-level COPYRIGHT file for details.
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
-
-
 from spack.package import *
 
 
-class AppleGl(Package):
-    """Shim package for the core OpenGL library from Apple"""
-
+class AppleGlBase(BundlePackage):
     homepage = "https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_intro/opengl_intro.html"
 
     maintainers("aphecetche")
 
-    has_code = False
-
-    version("4.1.0")
-
-    provides("gl@4.1")
-
-    # Only supported on 'platform=darwin' and compiler=apple-clang
-    conflicts("platform=linux")
-    conflicts("platform=cray")
-    conflicts("platform=windows")
-    conflicts("%gcc")
-    conflicts("%clang")
-    conflicts("%msvc")
-
-    phases = []
-
     def setup_dependent_build_environment(self, env, dependent_spec):
         # we try to setup a build environment with enough hints
         # for the build system to pick up on the Apple framework version
@@ -50,3 +30,16 @@ def headers(self):
     @property
     def libs(self):
         return LibraryList(join_path(self.prefix, "System/Library/Frameworks/OpenGL.framework"))
+
+
+class AppleGl(AppleGlBase):
+    """Shim package for the core OpenGL library from Apple"""
+
+    version("4.1.0")
+
+    provides("gl@4.1")
+
+    requires(
+        "%apple-clang platform=darwin",
+        msg="Apple-GL is only available on Darwin, when using Apple Clang",
+    )

var/spack/repos/builtin/packages/apple-glu/package.py

@@ -2,49 +2,18 @@
 # Spack Project Developers. See the top-level COPYRIGHT file for details.
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
-
-
 from spack.package import *
+from spack.pkg.builtin.apple_gl import AppleGlBase
 
 
-class AppleGlu(Package):
+class AppleGlu(AppleGlBase):
     """Shim package for Apple implementation of OpenGL Utility Libray (GLU)"""
 
-    homepage = "https://developer.apple.com/library/archive/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_intro/opengl_intro.html"
-
-    maintainers("aphecetche")
-
-    has_code = False
-
     version("1.3.0")
 
     provides("glu@1.3")
 
-    # Only supported on 'platform=darwin' and compiler=apple-clang
-    conflicts("platform=linux")
-    conflicts("platform=cray")
-    conflicts("%gcc")
-    conflicts("%clang")
-
-    phases = []
-
-    def setup_dependent_build_environment(self, env, dependent_spec):
-        # we try to setup a build environment with enough hints
-        # for the build system to pick up on the Apple framework version
-        # of OpenGL.
-        # - for a cmake build we actually needs nothing at all as
-        # find_package(OpenGL) will do the right thing
-        # - for the rest of the build systems we'll assume that
-        # setting the C_INCLUDE_PATH will be enough for the compilation phase
-        # and *** for the link phase.
-        env.prepend_path("C_INCLUDE_PATH", self.prefix[:-4])
-
-    @property
-    def headers(self):
-        return HeaderList(
-            join_path(self.prefix, "System/Library/Frameworks/OpenGL.framework/Headers")
+    requires(
+        "%apple-clang platform=darwin",
+        msg="Apple-GLU is only available on Darwin, when using Apple Clang",
     )
-
-    @property
-    def libs(self):
-        return LibraryList(join_path(self.prefix, "System/Library/Frameworks/OpenGL.framework"))