Massive conversion from Package to CMakePackage (#4975)

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

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class Cgns(Package):
+class Cgns(CMakePackage):
     """The CFD General Notation System (CGNS) provides a general, portable,
     and extensible standard for the storage and retrieval of computational
     fluid dynamics (CFD) analysis data."""
@@ -37,11 +37,12 @@ class Cgns(Package):
 
     variant('hdf5', default=True, description='Enable HDF5 interface')
 
-    depends_on('cmake', type='build')
+    depends_on('cmake@2.8:', type='build')
     depends_on('hdf5', when='+hdf5')
 
-    def install(self, spec, prefix):
-        cmake_args = std_cmake_args[:]
+    def cmake_args(self):
+        spec = self.spec
+        cmake_args = []
 
         if self.compiler.f77 and self.compiler.fc:
             cmake_args.append('-DCGNS_ENABLE_FORTRAN=ON')
@@ -66,8 +67,4 @@ def install(self, spec, prefix):
         else:
             cmake_args.append('-DCGNS_ENABLE_HDF5=OFF')
 
-        with working_dir('spack-build', create=True):
-            cmake('..', *cmake_args)
-
-            make()
-            make('install')
+        return cmake_args