Raise exception instead of exiting on dependency resolution errors

fusesoc/edalizer.py

@@ -74,16 +74,7 @@ def cores(self):
     @property
     def resolved_cores(self):
         """Get a list of all "used" cores after the dependency resolution"""
-        try:
-            return self.core_manager.get_depends(self.toplevel, self.flags)
-        except DependencyError as e:
-            logger.error(
-                e.msg + f"\nFailed to resolve dependencies for {self.toplevel}"
-            )
-            exit(1)
-        except SyntaxError as e:
-            logger.error(e.msg)
-            exit(1)
+        return self.core_manager.get_depends(self.toplevel, self.flags)
 
     @property
     def discovered_cores(self):

fusesoc/fusesoc.py

@@ -159,6 +159,10 @@ def get_backend(self, core, flags, backendargs=[]):
             raise RuntimeError(e.msg)
         except RuntimeError as e:
             raise RuntimeError("Setup failed : {}".format(str(e)))
+        except DependencyError as e:
+            raise RuntimeError(
+                "Failed to resolve dependencies. " + e.msg
+            )
 
         if os.path.exists(edam_file):
             old_edam = yaml_fread(edam_file, self.config.resolve_env_vars_early)