simplify comment-handling

conda_smithy/configure_feedstock.py

@@ -595,15 +595,11 @@ def _render_ci_provider(
             os.path.join(forge_dir, forge_config["recipe_dir"], "meta.yaml")
         ) as f:
             meta_lines = f.readlines()
-        # looking for `compiler('cuda')` with both quote variants
-        pat = re.compile(r".*compiler\((\"cuda\"|\'cuda\')\).*")
+        # looking for `compiler('cuda')` with both quote variants;
+        # do not match if there is a `#` somewhere before on the line
+        pat = re.compile(r"^[^\#]*compiler\((\"cuda\"|\'cuda\')\).*")
         for ml in meta_lines:
             if pat.match(ml):
-                # since python re-module does not support variable-length
-                # lookbehind, manually detect if line contains a comment,
-                # and if `compiler('cuda')` appears _before_ comment-sign.
-                if '#' in ml and not pat.match(ml.split("#")[0]):
-                    continue
                 os.environ["CF_CUDA_ENABLED"] = "True"
 
         config = conda_build.config.get_or_merge_config(