Add required argument to get_cuda_cc_template_value

In many places it isn't an error to have no CUDA compute capabilities.
Having a parameter to handle this case allows to avoid having to check
the EC parameter and the build option in every case causing potential inconsistencies.

Author: Flamefire

easybuild/framework/easyconfig/easyconfig.py

@@ -1968,17 +1968,22 @@ def asdict(self):
                 res[key] = value
         return res
 
-    def get_cuda_cc_template_value(self, key):
+    def get_cuda_cc_template_value(self, key, required=True):
         """
         Get template value based on --cuda-compute-capabilities EasyBuild configuration option
         and cuda_compute_capabilities easyconfig parameter.
         Returns user-friendly error message in case neither are defined,
         or if an unknown key is used.
+
+        :param required: If False and the key is not found, return an empty string instead of raising an error.
         """
         if key.startswith('cuda_') and any(x == key for x in TEMPLATE_NAMES_DYNAMIC):
             try:
                 return self.template_values[key]
             except KeyError:
+                if not required:
+                    self.log.debug(f'Key {key} not found in template values, returning empty value')
+                    return ''
                 error_msg = "Template value '%s' is not defined!\n"
                 error_msg += "Make sure that either the --cuda-compute-capabilities EasyBuild configuration "
                 error_msg += "option is set, or that the cuda_compute_capabilities easyconfig parameter is defined."

test/framework/easyconfig.py

@@ -5090,6 +5090,7 @@ def test_get_cuda_cc_template_value(self):
         }
         for key in cuda_template_values:
             self.assertErrorRegex(EasyBuildError, error_pattern % key, ec.get_cuda_cc_template_value, key)
+            self.assertEqual(ec.get_cuda_cc_template_value(key, required=False), '')
 
         update_build_option('cuda_compute_capabilities', ['6.5', '7.0'])
         ec = EasyConfig(self.eb_file)