backends: in "god function" to generate targets, early return after delegated func

We would return in a handful of lines when we check for a
guaranteed-true statement, `if name in self.processed_targets:`

But explicitly returning here lets mypy type narrow on the isinstance
checks.

1 files changed, 2 insertions, 0 deletions

diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index a095b7652..072789541 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -876,8 +876,10 @@ class NinjaBackend(backends.Backend):
             os.makedirs(self.get_target_private_dir_abs(target), exist_ok=True)
         if isinstance(target, build.CustomTarget):
             self.generate_custom_target(target)
+            return
         if isinstance(target, build.RunTarget):
             self.generate_run_target(target)
+            return
         compiled_sources: T.List[str] = []
         source2object: T.Dict[str, str] = {}
         name = target.get_id()