apfel: add v3.1.1 (now CMakePackage) (#45661)

Co-authored-by: wdconinc <wdconinc@users.noreply.github.com>
Co-authored-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

var/spack/repos/builtin/packages/apfel/package.py

@@ -3,10 +3,11 @@
 #
 # SPDX-License-Identifier: (Apache-2.0 OR MIT)
 
+from spack.build_systems import autotools, cmake
 from spack.package import *
 
 
-class Apfel(AutotoolsPackage):
+class Apfel(AutotoolsPackage, CMakePackage):
     """APFEL is a library able to perform DGLAP evolution up to NNLO in QCD and
     to NLO in QED, both with pole and MSbar masses. The coupled DGLAP
     QCD+QED evolution equations are solved in x-space by means of higher
@@ -19,25 +20,44 @@ class Apfel(AutotoolsPackage):
 
     license("GPL-3.0-or-later")
 
+    build_system(
+        conditional("autotools", when="@:3.0"), conditional("cmake", when="@3.1:"), default="cmake"
+    )
+
+    version("3.1.1", sha256="9006b2a9544e504e8f6b5047f665054151870c3c3a4a05db3d4fb46f21908d4b")
     version("3.0.6", sha256="7063c9eee457e030b97926ac166cdaedd84625b31397e1dfd01ae47371fb9f61")
     version("3.0.4", sha256="c7bfae7fe2dc0185981850f2fe6ae4842749339d064c25bf525b4ef412bbb224")
 
-    depends_on("cxx", type="build")  # generated
-    depends_on("fortran", type="build")  # generated
+    depends_on("cxx", type="build")
+    depends_on("fortran", type="build")
 
+    with when("build_system=cmake"):
+        depends_on("cmake@03.15:")
+
+    extends("python", when="+python")
     depends_on("swig", when="+python")
-    depends_on("python", type=("build", "run"))
+    depends_on("python", when="+python", type=("build", "run"))
     depends_on("lhapdf", when="+lhapdf", type=("build", "run"))
 
     variant("python", description="Build python wrapper", default=False)
     variant("lhapdf", description="Link to LHAPDF", default=False)
 
+
+class CMakeBuilder(cmake.CMakeBuilder):
+    def cmake_args(self):
+        args = [
+            self.define_from_variant("APFEL_ENABLE_PYTHON", "python"),
+            self.define_from_variant("APFEL_ENABLE_LHAPDF", "lhapdf"),
+        ]
+        # ensure installation of python module under CMAKE_INSTALL_PREFIX
+        if self.spec.satisfies("+python"):
+            args.append(self.define("APFEL_Python_SITEARCH", "autoprefix"))
+        return args
+
+
+class AutotoolsBuilder(autotools.AutotoolsBuilder):
     def configure_args(self):
         args = []
-        if self.spec.satisfies("~python"):
-            args.append("--disable-pywrap")
-        else:
-            args.append("--enable-pywrap")
-
+        args += self.enable_or_disable("pywrap", variant="python")
         args += self.enable_or_disable("lhapdf")
         return args